Semiconductor English

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TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 01: Wafer Fabrication Flow and Process Integration
Original fictional case: New product coordinator Eric describes lot L24 as being in packaging because the status says BEOL. Integration engineer Min explains that this lot is still in wafer fabrication, building on-wafer interconnect layers. Its current operation concerns metal layer M2. In this fictional route, an inspection review must be completed before the next authorized operation. Packaging has not started, and the lot is on hold pending that review. Eric must correct the customer update without inventing a shipping date.
Language workshop: Back-end does not always mean packaging
Communication goal: Explain the current process stage and ownership without confusing wafer interconnect fabrication with package assembly.
Language guidance: BEOL is still part of wafer fabrication in this conversation. It is not interchangeable with package assembly, although some organizations also use back-end for assembly and test. Expand the term and state the actual operation before communicating status.
Useful expressions (preserve the supplied facts): Here BEOL means back end of line. / The lot is still in wafer fabrication. / The current operation concerns metal layer M2. / On-wafer interconnect formation is not package assembly. / We need to preserve compatibility between successive process modules. / Which lot and wafer IDs does the update cover? / What is the next operation on the approved route? / L24 is on hold pending inspection review. / The next move needs authorized disposition. / This stage does not establish a shipment date. / Wafer sort and final packaged-device test are different steps. / Which team owns the inspection review? / Packaging has not started for this lot. / Keep the traveler linked to the lot and operation. / Does completed mean processed, inspected, or released? / Report the stage, hold reason, owner, and next decision.
Vocabulary: wafer: A semiconductor substrate on which many devices are fabricated. / die: An individual circuit area or chip separated from a wafer. / fab: A semiconductor fabrication facility. / wafer fabrication: Processes that form devices and interconnects on wafers. / process flow: The defined sequence of manufacturing operations. / process integration: Coordination of process steps into a functioning device flow. / FEOL: Front end of line, principally the formation of active devices. / MOL: Middle of line, connecting devices to the interconnect structure. / BEOL: Back end of line, forming the on-wafer interconnect structure. / interconnect: A conductive structure connecting circuit elements. / metal layer: A defined level of conductive routing in a chip. / via: A conductive connection between interconnect levels. / dielectric: An electrically insulating material used between conductors. / process module: A related group of operations within the fabrication flow. / lot: A tracked group of wafers or units processed under defined identity. / wafer ID: The identifier assigned to an individual wafer. / route: The controlled sequence assigned to a tracked product or lot. / traveler: A record accompanying material through its required operations. / WIP: Work in process: material not yet through the defined manufacturing flow. / lot hold: A restriction preventing a lot from proceeding without disposition. / disposition: An authorized decision about the next treatment or status of material. / wafer sort: Electrical testing of individual die while on the wafer. / dicing: Separating individual die from a wafer. / package assembly: Integrating and protecting die in the intended package structure.
Speaking task: Check the dialogue answers. Read Eric and Min aloud, expanding BEOL and FEOL when they appear. Switch roles. Read turns 9-20 again, stressing the hold, required decision, and stage not yet started. Complete the transfer and check its key. Read the corrected update without adding a shipping date.
Partner: Eric: Product coordinator / Min: Process integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Lot N6 is forming on-wafer interconnects. It is on hold for inspection review. Package assembly has not started, and no shipping date is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Eric: I will correct the packaging statement now, before the customer plans around a stage the lot has not reached.
Min: Say that package assembly has not started for this lot. You can give a precise current status without inventing dates for the remaining operations.
Eric: The revised message will locate L24 in wafer fabrication at M2, explain the inspection hold, and identify the next review. It will leave shipment timing uncommitted.
Min: That reflects the process flow accurately. The customer gets a clear explanation of progress and the pending decision instead of an optimistic interpretation of an abbreviation.
END REFERENCE

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TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 01: Wafer Fabrication Flow and Process Integration
Original fictional case: New product coordinator Eric describes lot L24 as being in packaging because the status says BEOL. Integration engineer Min explains that this lot is still in wafer fabrication, building on-wafer interconnect layers. Its current operation concerns metal layer M2. In this fictional route, an inspection review must be completed before the next authorized operation. Packaging has not started, and the lot is on hold pending that review. Eric must correct the customer update without inventing a shipping date.
Language workshop: Back-end does not always mean packaging
Communication goal: Explain the current process stage and ownership without confusing wafer interconnect fabrication with package assembly.
Language guidance: BEOL is still part of wafer fabrication in this conversation. It is not interchangeable with package assembly, although some organizations also use back-end for assembly and test. Expand the term and state the actual operation before communicating status.
Useful expressions (preserve the supplied facts): Here BEOL means back end of line. / The lot is still in wafer fabrication. / The current operation concerns metal layer M2. / On-wafer interconnect formation is not package assembly. / We need to preserve compatibility between successive process modules. / Which lot and wafer IDs does the update cover? / What is the next operation on the approved route? / L24 is on hold pending inspection review. / The next move needs authorized disposition. / This stage does not establish a shipment date. / Wafer sort and final packaged-device test are different steps. / Which team owns the inspection review? / Packaging has not started for this lot. / Keep the traveler linked to the lot and operation. / Does completed mean processed, inspected, or released? / Report the stage, hold reason, owner, and next decision.
Vocabulary: wafer: A semiconductor substrate on which many devices are fabricated. / die: An individual circuit area or chip separated from a wafer. / fab: A semiconductor fabrication facility. / wafer fabrication: Processes that form devices and interconnects on wafers. / process flow: The defined sequence of manufacturing operations. / process integration: Coordination of process steps into a functioning device flow. / FEOL: Front end of line, principally the formation of active devices. / MOL: Middle of line, connecting devices to the interconnect structure. / BEOL: Back end of line, forming the on-wafer interconnect structure. / interconnect: A conductive structure connecting circuit elements. / metal layer: A defined level of conductive routing in a chip. / via: A conductive connection between interconnect levels. / dielectric: An electrically insulating material used between conductors. / process module: A related group of operations within the fabrication flow. / lot: A tracked group of wafers or units processed under defined identity. / wafer ID: The identifier assigned to an individual wafer. / route: The controlled sequence assigned to a tracked product or lot. / traveler: A record accompanying material through its required operations. / WIP: Work in process: material not yet through the defined manufacturing flow. / lot hold: A restriction preventing a lot from proceeding without disposition. / disposition: An authorized decision about the next treatment or status of material. / wafer sort: Electrical testing of individual die while on the wafer. / dicing: Separating individual die from a wafer. / package assembly: Integrating and protecting die in the intended package structure.
Speaking task: Check the dialogue answers. Read Eric and Min aloud, expanding BEOL and FEOL when they appear. Switch roles. Read turns 9-20 again, stressing the hold, required decision, and stage not yet started. Complete the transfer and check its key. Read the corrected update without adding a shipping date.
Partner: Eric: Product coordinator / Min: Process integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Lot N6 is forming on-wafer interconnects. It is on hold for inspection review. Package assembly has not started, and no shipping date is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Eric: I will correct the packaging statement now, before the customer plans around a stage the lot has not reached.
Min: Say that package assembly has not started for this lot. You can give a precise current status without inventing dates for the remaining operations.
Eric: The revised message will locate L24 in wafer fabrication at M2, explain the inspection hold, and identify the next review. It will leave shipment timing uncommitted.
Min: That reflects the process flow accurately. The customer gets a clear explanation of progress and the pending decision instead of an optimistic interpretation of an abbreviation.
END REFERENCE

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TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 01: Wafer Fabrication Flow and Process Integration
Original fictional case: New product coordinator Eric describes lot L24 as being in packaging because the status says BEOL. Integration engineer Min explains that this lot is still in wafer fabrication, building on-wafer interconnect layers. Its current operation concerns metal layer M2. In this fictional route, an inspection review must be completed before the next authorized operation. Packaging has not started, and the lot is on hold pending that review. Eric must correct the customer update without inventing a shipping date.
Language workshop: Back-end does not always mean packaging
Communication goal: Explain the current process stage and ownership without confusing wafer interconnect fabrication with package assembly.
Language guidance: BEOL is still part of wafer fabrication in this conversation. It is not interchangeable with package assembly, although some organizations also use back-end for assembly and test. Expand the term and state the actual operation before communicating status.
Useful expressions (preserve the supplied facts): Here BEOL means back end of line. / The lot is still in wafer fabrication. / The current operation concerns metal layer M2. / On-wafer interconnect formation is not package assembly. / We need to preserve compatibility between successive process modules. / Which lot and wafer IDs does the update cover? / What is the next operation on the approved route? / L24 is on hold pending inspection review. / The next move needs authorized disposition. / This stage does not establish a shipment date. / Wafer sort and final packaged-device test are different steps. / Which team owns the inspection review? / Packaging has not started for this lot. / Keep the traveler linked to the lot and operation. / Does completed mean processed, inspected, or released? / Report the stage, hold reason, owner, and next decision.
Vocabulary: wafer: A semiconductor substrate on which many devices are fabricated. / die: An individual circuit area or chip separated from a wafer. / fab: A semiconductor fabrication facility. / wafer fabrication: Processes that form devices and interconnects on wafers. / process flow: The defined sequence of manufacturing operations. / process integration: Coordination of process steps into a functioning device flow. / FEOL: Front end of line, principally the formation of active devices. / MOL: Middle of line, connecting devices to the interconnect structure. / BEOL: Back end of line, forming the on-wafer interconnect structure. / interconnect: A conductive structure connecting circuit elements. / metal layer: A defined level of conductive routing in a chip. / via: A conductive connection between interconnect levels. / dielectric: An electrically insulating material used between conductors. / process module: A related group of operations within the fabrication flow. / lot: A tracked group of wafers or units processed under defined identity. / wafer ID: The identifier assigned to an individual wafer. / route: The controlled sequence assigned to a tracked product or lot. / traveler: A record accompanying material through its required operations. / WIP: Work in process: material not yet through the defined manufacturing flow. / lot hold: A restriction preventing a lot from proceeding without disposition. / disposition: An authorized decision about the next treatment or status of material. / wafer sort: Electrical testing of individual die while on the wafer. / dicing: Separating individual die from a wafer. / package assembly: Integrating and protecting die in the intended package structure.
Speaking task: Check the dialogue answers. Read Eric and Min aloud, expanding BEOL and FEOL when they appear. Switch roles. Read turns 9-20 again, stressing the hold, required decision, and stage not yet started. Complete the transfer and check its key. Read the corrected update without adding a shipping date.
Partner: Eric: Product coordinator / Min: Process integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Lot N6 is forming on-wafer interconnects. It is on hold for inspection review. Package assembly has not started, and no shipping date is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Eric: I will correct the packaging statement now, before the customer plans around a stage the lot has not reached.
Min: Say that package assembly has not started for this lot. You can give a precise current status without inventing dates for the remaining operations.
Eric: The revised message will locate L24 in wafer fabrication at M2, explain the inspection hold, and identify the next review. It will leave shipment timing uncommitted.
Min: That reflects the process flow accurately. The customer gets a clear explanation of progress and the pending decision instead of an optimistic interpretation of an abbreviation.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 02: Lithography, Reticles, and Critical Dimensions
Original fictional case: Lithography engineer Lina reviews a reported critical-dimension increase with metrology engineer Theo. The summary initially omits the layer and stage. The records show M2 after etch, with means of 86 nm and 89 nm. However, the two measurements used different CD-SEM recipes and different sampling sites. No comparable remeasurement, specification assessment, or cause investigation is complete. Lina must report the apparent 3 nm difference without treating it as a confirmed lithography shift or changing an exposure setting.
Language workshop: A three-nanometer shift without a common basis
Communication goal: Clarify a reported dimension change by identifying the layer, process stage, sampling, and measurement recipe before attributing a cause.
Language guidance: The arithmetic difference is 3 nm. That does not prove a 3 nm physical process shift because the recipes and sampled sites differ. A post-etch CD combines the history of pattern formation and transfer; it does not identify exposure as the sole cause.
Useful expressions (preserve the supplied facts): Which layer and feature does the CD refer to? / These measurements are from M2 after etch. / The reported means are 86 and 89 nm. / The apparent difference is 3 nm. / Did both datasets use the same CD-SEM recipe? / Were the same types of sites sampled? / Post-etch CD does not isolate exposure performance. / Overlay is not another name for critical dimension. / Remeasure on an agreed, traceable basis. / Keep both original recipes with their datasets. / Do not infer an exposure change from this comparison alone. / Which specification applies to this feature and stage? / A mean shift and within-wafer variation are different questions. / Which reticle revision was used for the layer? / Resolve the measurement difference before attributing the process cause. / State the apparent shift and the comparability limitation together.
Vocabulary: lithography: Pattern formation using exposure of a sensitive layer. / reticle: A patterned optical element used in lithographic exposure. / photoresist: A radiation-sensitive material used to form a pattern. / exposure dose: The delivered exposure energy per unit area. / focus offset: A displacement from a defined best-focus reference. / critical dimension: A feature dimension important to process or device performance, abbreviated CD. / CD-SEM: A scanning electron microscope used for critical-dimension measurement. / measurement recipe: The controlled settings and analysis used to obtain a measurement. / sampling site: A specified location selected for measurement. / post-develop: Measured or occurring after resist development. / post-etch: Measured or occurring after an etch operation. / etch bias: A dimensional difference associated with pattern transfer through etch. / overlay: Alignment accuracy between patterned layers. / alignment mark: A feature used to position a layer or measurement. / line-edge roughness: Variation of a patterned line edge from its intended shape. / line-width roughness: Variation in the width of a patterned line. / pitch: The repeat distance between corresponding features. / pattern fidelity: Agreement between the intended and produced pattern. / optical proximity correction: Layout adjustments compensating for imaging effects, abbreviated OPC. / focus-exposure matrix: A test pattern set spanning selected focus and dose conditions. / depth of focus: A usable focus range under a defined imaging criterion. / exposure latitude: A usable dose range under a defined imaging criterion. / measurement bias: A systematic measurement difference relative to a reference. / remeasurement: A repeated measurement under identified conditions.
Speaking task: Check the answers. Read 86 nm and 89 nm as complete spoken measurements. Switch roles for turns 7-16. Stress apparent difference, post-etch, and the changed measurement basis. Check and read the transfer twice. Keep feature size distinct from alignment.
Partner: Lina: Lithography engineer / Theo: Metrology engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A layer has reported means of 120 and 124 nm after etch. Different measurement recipes and sampling sites were used. The cause is not established.
Model for comparison AFTER my attempt, not a response to give me first: Lina: I will include the reticle revision in the context record as well. That gives the investigation the configuration information without implying the reticle has been found defective.
Theo: Good. The reticle identity belongs with the layer history. Configuration details help evaluate hypotheses, but listing a component does not make it the cause.
Lina: The revised slide will keep the two means and the three-nanometer difference, state the changed measurement basis, and leave the cause and specification assessment open.
Theo: That protects pattern fidelity discussions from unsupported conclusions. We can plan the next evidence review without treating this comparison as permission to change exposure settings.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 02: Lithography, Reticles, and Critical Dimensions
Original fictional case: Lithography engineer Lina reviews a reported critical-dimension increase with metrology engineer Theo. The summary initially omits the layer and stage. The records show M2 after etch, with means of 86 nm and 89 nm. However, the two measurements used different CD-SEM recipes and different sampling sites. No comparable remeasurement, specification assessment, or cause investigation is complete. Lina must report the apparent 3 nm difference without treating it as a confirmed lithography shift or changing an exposure setting.
Language workshop: A three-nanometer shift without a common basis
Communication goal: Clarify a reported dimension change by identifying the layer, process stage, sampling, and measurement recipe before attributing a cause.
Language guidance: The arithmetic difference is 3 nm. That does not prove a 3 nm physical process shift because the recipes and sampled sites differ. A post-etch CD combines the history of pattern formation and transfer; it does not identify exposure as the sole cause.
Useful expressions (preserve the supplied facts): Which layer and feature does the CD refer to? / These measurements are from M2 after etch. / The reported means are 86 and 89 nm. / The apparent difference is 3 nm. / Did both datasets use the same CD-SEM recipe? / Were the same types of sites sampled? / Post-etch CD does not isolate exposure performance. / Overlay is not another name for critical dimension. / Remeasure on an agreed, traceable basis. / Keep both original recipes with their datasets. / Do not infer an exposure change from this comparison alone. / Which specification applies to this feature and stage? / A mean shift and within-wafer variation are different questions. / Which reticle revision was used for the layer? / Resolve the measurement difference before attributing the process cause. / State the apparent shift and the comparability limitation together.
Vocabulary: lithography: Pattern formation using exposure of a sensitive layer. / reticle: A patterned optical element used in lithographic exposure. / photoresist: A radiation-sensitive material used to form a pattern. / exposure dose: The delivered exposure energy per unit area. / focus offset: A displacement from a defined best-focus reference. / critical dimension: A feature dimension important to process or device performance, abbreviated CD. / CD-SEM: A scanning electron microscope used for critical-dimension measurement. / measurement recipe: The controlled settings and analysis used to obtain a measurement. / sampling site: A specified location selected for measurement. / post-develop: Measured or occurring after resist development. / post-etch: Measured or occurring after an etch operation. / etch bias: A dimensional difference associated with pattern transfer through etch. / overlay: Alignment accuracy between patterned layers. / alignment mark: A feature used to position a layer or measurement. / line-edge roughness: Variation of a patterned line edge from its intended shape. / line-width roughness: Variation in the width of a patterned line. / pitch: The repeat distance between corresponding features. / pattern fidelity: Agreement between the intended and produced pattern. / optical proximity correction: Layout adjustments compensating for imaging effects, abbreviated OPC. / focus-exposure matrix: A test pattern set spanning selected focus and dose conditions. / depth of focus: A usable focus range under a defined imaging criterion. / exposure latitude: A usable dose range under a defined imaging criterion. / measurement bias: A systematic measurement difference relative to a reference. / remeasurement: A repeated measurement under identified conditions.
Speaking task: Check the answers. Read 86 nm and 89 nm as complete spoken measurements. Switch roles for turns 7-16. Stress apparent difference, post-etch, and the changed measurement basis. Check and read the transfer twice. Keep feature size distinct from alignment.
Partner: Lina: Lithography engineer / Theo: Metrology engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A layer has reported means of 120 and 124 nm after etch. Different measurement recipes and sampling sites were used. The cause is not established.
Model for comparison AFTER my attempt, not a response to give me first: Lina: I will include the reticle revision in the context record as well. That gives the investigation the configuration information without implying the reticle has been found defective.
Theo: Good. The reticle identity belongs with the layer history. Configuration details help evaluate hypotheses, but listing a component does not make it the cause.
Lina: The revised slide will keep the two means and the three-nanometer difference, state the changed measurement basis, and leave the cause and specification assessment open.
Theo: That protects pattern fidelity discussions from unsupported conclusions. We can plan the next evidence review without treating this comparison as permission to change exposure settings.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 02: Lithography, Reticles, and Critical Dimensions
Original fictional case: Lithography engineer Lina reviews a reported critical-dimension increase with metrology engineer Theo. The summary initially omits the layer and stage. The records show M2 after etch, with means of 86 nm and 89 nm. However, the two measurements used different CD-SEM recipes and different sampling sites. No comparable remeasurement, specification assessment, or cause investigation is complete. Lina must report the apparent 3 nm difference without treating it as a confirmed lithography shift or changing an exposure setting.
Language workshop: A three-nanometer shift without a common basis
Communication goal: Clarify a reported dimension change by identifying the layer, process stage, sampling, and measurement recipe before attributing a cause.
Language guidance: The arithmetic difference is 3 nm. That does not prove a 3 nm physical process shift because the recipes and sampled sites differ. A post-etch CD combines the history of pattern formation and transfer; it does not identify exposure as the sole cause.
Useful expressions (preserve the supplied facts): Which layer and feature does the CD refer to? / These measurements are from M2 after etch. / The reported means are 86 and 89 nm. / The apparent difference is 3 nm. / Did both datasets use the same CD-SEM recipe? / Were the same types of sites sampled? / Post-etch CD does not isolate exposure performance. / Overlay is not another name for critical dimension. / Remeasure on an agreed, traceable basis. / Keep both original recipes with their datasets. / Do not infer an exposure change from this comparison alone. / Which specification applies to this feature and stage? / A mean shift and within-wafer variation are different questions. / Which reticle revision was used for the layer? / Resolve the measurement difference before attributing the process cause. / State the apparent shift and the comparability limitation together.
Vocabulary: lithography: Pattern formation using exposure of a sensitive layer. / reticle: A patterned optical element used in lithographic exposure. / photoresist: A radiation-sensitive material used to form a pattern. / exposure dose: The delivered exposure energy per unit area. / focus offset: A displacement from a defined best-focus reference. / critical dimension: A feature dimension important to process or device performance, abbreviated CD. / CD-SEM: A scanning electron microscope used for critical-dimension measurement. / measurement recipe: The controlled settings and analysis used to obtain a measurement. / sampling site: A specified location selected for measurement. / post-develop: Measured or occurring after resist development. / post-etch: Measured or occurring after an etch operation. / etch bias: A dimensional difference associated with pattern transfer through etch. / overlay: Alignment accuracy between patterned layers. / alignment mark: A feature used to position a layer or measurement. / line-edge roughness: Variation of a patterned line edge from its intended shape. / line-width roughness: Variation in the width of a patterned line. / pitch: The repeat distance between corresponding features. / pattern fidelity: Agreement between the intended and produced pattern. / optical proximity correction: Layout adjustments compensating for imaging effects, abbreviated OPC. / focus-exposure matrix: A test pattern set spanning selected focus and dose conditions. / depth of focus: A usable focus range under a defined imaging criterion. / exposure latitude: A usable dose range under a defined imaging criterion. / measurement bias: A systematic measurement difference relative to a reference. / remeasurement: A repeated measurement under identified conditions.
Speaking task: Check the answers. Read 86 nm and 89 nm as complete spoken measurements. Switch roles for turns 7-16. Stress apparent difference, post-etch, and the changed measurement basis. Check and read the transfer twice. Keep feature size distinct from alignment.
Partner: Lina: Lithography engineer / Theo: Metrology engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A layer has reported means of 120 and 124 nm after etch. Different measurement recipes and sampling sites were used. The cause is not established.
Model for comparison AFTER my attempt, not a response to give me first: Lina: I will include the reticle revision in the context record as well. That gives the investigation the configuration information without implying the reticle has been found defective.
Theo: Good. The reticle identity belongs with the layer history. Configuration details help evaluate hypotheses, but listing a component does not make it the cause.
Lina: The revised slide will keep the two means and the three-nanometer difference, state the changed measurement basis, and leave the cause and specification assessment open.
Theo: That protects pattern fidelity discussions from unsupported conclusions. We can plan the next evidence review without treating this comparison as permission to change exposure settings.
END REFERENCE

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TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 03: Deposition, Etch, CMP, and Process Windows
Original fictional case: Deposition engineer Yuki and integration engineer Sam review a trial film process. At the nominal setting, a defined thickness-nonuniformity metric falls from 5% to 3%; lower is better on this unchanged measurement basis. Only that center condition has been tested. The proposed low and high settings remain untested, and effects on subsequent etch and chemical mechanical planarization are not assessed. The new recipe is not released. A summary nevertheless says the complete process window is validated.
Language workshop: A better center point is not a wider window
Communication goal: Describe a process trial improvement without extending it to untested conditions or overlooking downstream integration effects.
Language guidance: The metric improves by 2 percentage points, a 40% relative reduction from its initial 5% value. Neither calculation establishes the proposed window. The same measurement definition is used here; other nonuniformity formulas must not be mixed into the comparison.
Useful expressions (preserve the supplied facts): The defined thickness-nonuniformity metric fell from 5% to 3%. / Both values use the same measurement definition. / The result applies to the nominal setting only. / That is two percentage points, or a 40% relative reduction. / One center point does not establish a process window. / The proposed low and high settings are untested. / What does the film change mean for the subsequent etch? / Has compatibility with the CMP step been assessed? / Better uniformity does not prove every film property improved. / We still need the integration trade-off assessment. / This is a trial result, not a released recipe. / Which responses must meet limits across the range? / Keep the trial recipe revision with the measurement record. / Assess the planned range and the identified downstream effects. / Untested corners are unresolved, not failed. / Report the center-point result and the remaining validation scope.
Vocabulary: deposition: Formation of a material film on a surface. / thin film: A material layer with a small controlled thickness. / CVD: Chemical vapor deposition, forming a film through chemical reactions of vapor precursors. / PVD: Physical vapor deposition, forming a film from material vaporized by methods such as sputtering or evaporation. / ALD: Atomic layer deposition, using successive self-limiting surface reactions. / precursor: A starting substance used in a film-forming reaction. / conformality: How consistently a film coats different surface orientations or features. / step coverage: Film thickness on a specified feature relative to thickness on a reference surface. / film stress: Internal stress within a deposited film. / thickness nonuniformity: Variation in film thickness under a defined metric. / etch selectivity: Relative removal rates of different materials in an etch process. / anisotropy: Direction-dependent behavior, such as preferential vertical removal. / endpoint detection: Monitoring used to identify a process completion condition. / overetch: Additional etching beyond a defined clearing or endpoint condition. / CMP: Chemical mechanical planarization, combining chemical and mechanical surface removal. / slurry: A polishing fluid mixture supplying chemical action and often suspended abrasive particles in CMP. / dishing: Local depression of a material surface during planarization. / erosion: Excess regional material removal during planarization. / process window: A range of conditions meeting defined process requirements. / nominal setting: The chosen central or reference process setting. / corner condition: A selected limiting combination in an evaluation range. / process interaction: An effect arising from the relationship between process steps or factors. / integration trade-off: An exchange between benefits and effects across process steps. / recipe release: Authorization of a controlled process recipe for defined use.
Speaking task: Check the answers. Read the opening six turns, distinguishing two percentage points from forty percent. Switch roles. Read the etch and CMP exchanges while keeping both assessments pending. Complete and check the transfer. Read nominal setting, process window, and release as separate claims.
Partner: Yuki: Deposition engineer / Sam: Integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: At one nominal setting, an unchanged nonuniformity metric falls from 8% to 6%. Lower is better. Edge settings and downstream etch remain untested; the recipe is not released.
Model for comparison AFTER my attempt, not a response to give me first: Yuki: Please keep trial revision on the summary. Planning is asking about routine use, and I do not want this result mistaken for a production release.
Sam: Keep recipe release separate from the experiment. A favorable metric can support the review, but the required scope and approvals still need to be completed.
Yuki: I will revise the summary to report the center-point improvement, the unchanged metric basis, and the untested range. I will list the etch and planarization reviews as pending.
Sam: That presents the deposition result accurately. The team can recognize progress while seeing exactly what evidence is still needed before making a broader process claim.
END REFERENCE

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TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 03: Deposition, Etch, CMP, and Process Windows
Original fictional case: Deposition engineer Yuki and integration engineer Sam review a trial film process. At the nominal setting, a defined thickness-nonuniformity metric falls from 5% to 3%; lower is better on this unchanged measurement basis. Only that center condition has been tested. The proposed low and high settings remain untested, and effects on subsequent etch and chemical mechanical planarization are not assessed. The new recipe is not released. A summary nevertheless says the complete process window is validated.
Language workshop: A better center point is not a wider window
Communication goal: Describe a process trial improvement without extending it to untested conditions or overlooking downstream integration effects.
Language guidance: The metric improves by 2 percentage points, a 40% relative reduction from its initial 5% value. Neither calculation establishes the proposed window. The same measurement definition is used here; other nonuniformity formulas must not be mixed into the comparison.
Useful expressions (preserve the supplied facts): The defined thickness-nonuniformity metric fell from 5% to 3%. / Both values use the same measurement definition. / The result applies to the nominal setting only. / That is two percentage points, or a 40% relative reduction. / One center point does not establish a process window. / The proposed low and high settings are untested. / What does the film change mean for the subsequent etch? / Has compatibility with the CMP step been assessed? / Better uniformity does not prove every film property improved. / We still need the integration trade-off assessment. / This is a trial result, not a released recipe. / Which responses must meet limits across the range? / Keep the trial recipe revision with the measurement record. / Assess the planned range and the identified downstream effects. / Untested corners are unresolved, not failed. / Report the center-point result and the remaining validation scope.
Vocabulary: deposition: Formation of a material film on a surface. / thin film: A material layer with a small controlled thickness. / CVD: Chemical vapor deposition, forming a film through chemical reactions of vapor precursors. / PVD: Physical vapor deposition, forming a film from material vaporized by methods such as sputtering or evaporation. / ALD: Atomic layer deposition, using successive self-limiting surface reactions. / precursor: A starting substance used in a film-forming reaction. / conformality: How consistently a film coats different surface orientations or features. / step coverage: Film thickness on a specified feature relative to thickness on a reference surface. / film stress: Internal stress within a deposited film. / thickness nonuniformity: Variation in film thickness under a defined metric. / etch selectivity: Relative removal rates of different materials in an etch process. / anisotropy: Direction-dependent behavior, such as preferential vertical removal. / endpoint detection: Monitoring used to identify a process completion condition. / overetch: Additional etching beyond a defined clearing or endpoint condition. / CMP: Chemical mechanical planarization, combining chemical and mechanical surface removal. / slurry: A polishing fluid mixture supplying chemical action and often suspended abrasive particles in CMP. / dishing: Local depression of a material surface during planarization. / erosion: Excess regional material removal during planarization. / process window: A range of conditions meeting defined process requirements. / nominal setting: The chosen central or reference process setting. / corner condition: A selected limiting combination in an evaluation range. / process interaction: An effect arising from the relationship between process steps or factors. / integration trade-off: An exchange between benefits and effects across process steps. / recipe release: Authorization of a controlled process recipe for defined use.
Speaking task: Check the answers. Read the opening six turns, distinguishing two percentage points from forty percent. Switch roles. Read the etch and CMP exchanges while keeping both assessments pending. Complete and check the transfer. Read nominal setting, process window, and release as separate claims.
Partner: Yuki: Deposition engineer / Sam: Integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: At one nominal setting, an unchanged nonuniformity metric falls from 8% to 6%. Lower is better. Edge settings and downstream etch remain untested; the recipe is not released.
Model for comparison AFTER my attempt, not a response to give me first: Yuki: Please keep trial revision on the summary. Planning is asking about routine use, and I do not want this result mistaken for a production release.
Sam: Keep recipe release separate from the experiment. A favorable metric can support the review, but the required scope and approvals still need to be completed.
Yuki: I will revise the summary to report the center-point improvement, the unchanged metric basis, and the untested range. I will list the etch and planarization reviews as pending.
Sam: That presents the deposition result accurately. The team can recognize progress while seeing exactly what evidence is still needed before making a broader process claim.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 03: Deposition, Etch, CMP, and Process Windows
Original fictional case: Deposition engineer Yuki and integration engineer Sam review a trial film process. At the nominal setting, a defined thickness-nonuniformity metric falls from 5% to 3%; lower is better on this unchanged measurement basis. Only that center condition has been tested. The proposed low and high settings remain untested, and effects on subsequent etch and chemical mechanical planarization are not assessed. The new recipe is not released. A summary nevertheless says the complete process window is validated.
Language workshop: A better center point is not a wider window
Communication goal: Describe a process trial improvement without extending it to untested conditions or overlooking downstream integration effects.
Language guidance: The metric improves by 2 percentage points, a 40% relative reduction from its initial 5% value. Neither calculation establishes the proposed window. The same measurement definition is used here; other nonuniformity formulas must not be mixed into the comparison.
Useful expressions (preserve the supplied facts): The defined thickness-nonuniformity metric fell from 5% to 3%. / Both values use the same measurement definition. / The result applies to the nominal setting only. / That is two percentage points, or a 40% relative reduction. / One center point does not establish a process window. / The proposed low and high settings are untested. / What does the film change mean for the subsequent etch? / Has compatibility with the CMP step been assessed? / Better uniformity does not prove every film property improved. / We still need the integration trade-off assessment. / This is a trial result, not a released recipe. / Which responses must meet limits across the range? / Keep the trial recipe revision with the measurement record. / Assess the planned range and the identified downstream effects. / Untested corners are unresolved, not failed. / Report the center-point result and the remaining validation scope.
Vocabulary: deposition: Formation of a material film on a surface. / thin film: A material layer with a small controlled thickness. / CVD: Chemical vapor deposition, forming a film through chemical reactions of vapor precursors. / PVD: Physical vapor deposition, forming a film from material vaporized by methods such as sputtering or evaporation. / ALD: Atomic layer deposition, using successive self-limiting surface reactions. / precursor: A starting substance used in a film-forming reaction. / conformality: How consistently a film coats different surface orientations or features. / step coverage: Film thickness on a specified feature relative to thickness on a reference surface. / film stress: Internal stress within a deposited film. / thickness nonuniformity: Variation in film thickness under a defined metric. / etch selectivity: Relative removal rates of different materials in an etch process. / anisotropy: Direction-dependent behavior, such as preferential vertical removal. / endpoint detection: Monitoring used to identify a process completion condition. / overetch: Additional etching beyond a defined clearing or endpoint condition. / CMP: Chemical mechanical planarization, combining chemical and mechanical surface removal. / slurry: A polishing fluid mixture supplying chemical action and often suspended abrasive particles in CMP. / dishing: Local depression of a material surface during planarization. / erosion: Excess regional material removal during planarization. / process window: A range of conditions meeting defined process requirements. / nominal setting: The chosen central or reference process setting. / corner condition: A selected limiting combination in an evaluation range. / process interaction: An effect arising from the relationship between process steps or factors. / integration trade-off: An exchange between benefits and effects across process steps. / recipe release: Authorization of a controlled process recipe for defined use.
Speaking task: Check the answers. Read the opening six turns, distinguishing two percentage points from forty percent. Switch roles. Read the etch and CMP exchanges while keeping both assessments pending. Complete and check the transfer. Read nominal setting, process window, and release as separate claims.
Partner: Yuki: Deposition engineer / Sam: Integration engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: At one nominal setting, an unchanged nonuniformity metric falls from 8% to 6%. Lower is better. Edge settings and downstream etch remain untested; the recipe is not released.
Model for comparison AFTER my attempt, not a response to give me first: Yuki: Please keep trial revision on the summary. Planning is asking about routine use, and I do not want this result mistaken for a production release.
Sam: Keep recipe release separate from the experiment. A favorable metric can support the review, but the required scope and approvals still need to be completed.
Yuki: I will revise the summary to report the center-point improvement, the unchanged metric basis, and the untested range. I will list the etch and planarization reviews as pending.
Sam: That presents the deposition result accurately. The team can recognize progress while seeing exactly what evidence is still needed before making a broader process claim.
END REFERENCE

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TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 04: Metrology, SPC, and Yield Learning
Original fictional case: Yield engineer Ravi presents a pilot lot with 92 passing die out of 100 tested, compared with a reference lot with 900 passing die out of 1,000 tested. The product mixes differ, and no controlled comparison or statistical significance assessment has been completed. Manager Elena wants to announce that a process change caused a two-percent yield improvement. The team also has no time-ordered control-chart analysis supporting a stability claim. Ravi must preserve the useful observations while correcting the causal, percentage, and stability language.
Language workshop: Two percentage points, not a proven process gain
Communication goal: Report yield with counts and comparison limits, and distinguish product acceptance from evidence about process stability.
Language guidance: The pilot has 92% yield and the reference 90%. The difference is 2 percentage points, or about 2.22% relative to 90%. Different product mixes and sample sizes mean this observation alone does not establish a causal improvement or statistical significance.
Useful expressions (preserve the supplied facts): The pilot passed 92 of 100 tested die. / The reference passed 900 of 1,000 tested die. / The observed difference is two percentage points. / Relative to 90%, that is approximately 2.22%. / The two lots have different product mixes. / The process change is not isolated by this comparison. / Statistical significance has not been assessed. / Compare relevant product groups on a consistent basis. / Control limits and specification limits serve different purposes. / Which time-ordered evidence supports the stability claim? / State the subgrouping and monitoring rules. / A control signal warrants investigation under the defined procedure. / The signal does not identify its own cause. / The pilot result is encouraging but limited. / Confirm the measurement and test basis before combining data. / Report the counts, observed difference, limitations, and next analysis.
Vocabulary: metrology: The science and practice of measurement. / electrical yield: The proportion meeting defined electrical test criteria. / pass count: The number of tested items meeting the stated criteria. / tested population: The set of items included in a reported test result. / denominator: The total used as the base of a fraction or percentage. / product mix: The composition of different products in a dataset. / pilot lot: A limited production lot used to evaluate a process or product. / reference lot: A lot used as a stated comparison basis. / percentage point: A unit for the absolute difference between percentages. / relative change: A change divided by its specified starting value. / confounding factor: A factor that prevents clean attribution of an observed relationship. / stratification: Separating data into relevant comparable groups. / SPC: Statistical process control, using data to monitor process behavior. / control chart: A time-ordered chart with a defined process-monitoring method. / control limit: A monitoring boundary derived under a stated process model or method. / specification limit: A defined product or process acceptance boundary. / common-cause variation: Variation inherent in the currently defined process system. / special-cause variation: Variation associated with a nonroutine identifiable influence. / control signal: A result meeting a defined rule for investigation on a control chart. / process stability: Consistent statistical behavior under the defined monitoring basis. / subgroup: A defined set of observations grouped for process analysis. / measurement system: The instruments, methods, people, and conditions producing measurements. / yield learning: Investigation that improves understanding of yield losses and drivers. / causal attribution: Assigning an observed effect to a particular cause.
Speaking task: Check the answers. Read both pass counts and denominators before reading their percentages. Switch roles. Read turns 5-16, emphasizing percentage points, product mix, and the two types of limits. Complete and check the transfer. Read the corrected exchange without turning the observed difference into a causal claim.
Partner: Elena: Yield program manager / Ravi: Yield engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A trial passes 48 of 50 tested die, or 96%. A reference passes 450 of 500, or 90%. Product mixes differ, and no causal analysis is complete.
Model for comparison AFTER my attempt, not a response to give me first: Elena: We also need to make sure the measurements and test criteria are consistent before combining records. Otherwise the next comparison could carry a different hidden change.
Ravi: Check the measurement system and test basis. Clear denominators are essential, but they do not solve inconsistencies in how observations were produced or classified.
Elena: The revised update will report the counts, the two-point difference, and the changed product mix. It will leave significance, stability, and causality unclaimed pending the appropriate analysis.
Ravi: That supports yield learning. The pilot remains informative, and the team gets a precise next question instead of a success claim that the present data cannot establish.
END REFERENCE

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TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 04: Metrology, SPC, and Yield Learning
Original fictional case: Yield engineer Ravi presents a pilot lot with 92 passing die out of 100 tested, compared with a reference lot with 900 passing die out of 1,000 tested. The product mixes differ, and no controlled comparison or statistical significance assessment has been completed. Manager Elena wants to announce that a process change caused a two-percent yield improvement. The team also has no time-ordered control-chart analysis supporting a stability claim. Ravi must preserve the useful observations while correcting the causal, percentage, and stability language.
Language workshop: Two percentage points, not a proven process gain
Communication goal: Report yield with counts and comparison limits, and distinguish product acceptance from evidence about process stability.
Language guidance: The pilot has 92% yield and the reference 90%. The difference is 2 percentage points, or about 2.22% relative to 90%. Different product mixes and sample sizes mean this observation alone does not establish a causal improvement or statistical significance.
Useful expressions (preserve the supplied facts): The pilot passed 92 of 100 tested die. / The reference passed 900 of 1,000 tested die. / The observed difference is two percentage points. / Relative to 90%, that is approximately 2.22%. / The two lots have different product mixes. / The process change is not isolated by this comparison. / Statistical significance has not been assessed. / Compare relevant product groups on a consistent basis. / Control limits and specification limits serve different purposes. / Which time-ordered evidence supports the stability claim? / State the subgrouping and monitoring rules. / A control signal warrants investigation under the defined procedure. / The signal does not identify its own cause. / The pilot result is encouraging but limited. / Confirm the measurement and test basis before combining data. / Report the counts, observed difference, limitations, and next analysis.
Vocabulary: metrology: The science and practice of measurement. / electrical yield: The proportion meeting defined electrical test criteria. / pass count: The number of tested items meeting the stated criteria. / tested population: The set of items included in a reported test result. / denominator: The total used as the base of a fraction or percentage. / product mix: The composition of different products in a dataset. / pilot lot: A limited production lot used to evaluate a process or product. / reference lot: A lot used as a stated comparison basis. / percentage point: A unit for the absolute difference between percentages. / relative change: A change divided by its specified starting value. / confounding factor: A factor that prevents clean attribution of an observed relationship. / stratification: Separating data into relevant comparable groups. / SPC: Statistical process control, using data to monitor process behavior. / control chart: A time-ordered chart with a defined process-monitoring method. / control limit: A monitoring boundary derived under a stated process model or method. / specification limit: A defined product or process acceptance boundary. / common-cause variation: Variation inherent in the currently defined process system. / special-cause variation: Variation associated with a nonroutine identifiable influence. / control signal: A result meeting a defined rule for investigation on a control chart. / process stability: Consistent statistical behavior under the defined monitoring basis. / subgroup: A defined set of observations grouped for process analysis. / measurement system: The instruments, methods, people, and conditions producing measurements. / yield learning: Investigation that improves understanding of yield losses and drivers. / causal attribution: Assigning an observed effect to a particular cause.
Speaking task: Check the answers. Read both pass counts and denominators before reading their percentages. Switch roles. Read turns 5-16, emphasizing percentage points, product mix, and the two types of limits. Complete and check the transfer. Read the corrected exchange without turning the observed difference into a causal claim.
Partner: Elena: Yield program manager / Ravi: Yield engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A trial passes 48 of 50 tested die, or 96%. A reference passes 450 of 500, or 90%. Product mixes differ, and no causal analysis is complete.
Model for comparison AFTER my attempt, not a response to give me first: Elena: We also need to make sure the measurements and test criteria are consistent before combining records. Otherwise the next comparison could carry a different hidden change.
Ravi: Check the measurement system and test basis. Clear denominators are essential, but they do not solve inconsistencies in how observations were produced or classified.
Elena: The revised update will report the counts, the two-point difference, and the changed product mix. It will leave significance, stability, and causality unclaimed pending the appropriate analysis.
Ravi: That supports yield learning. The pilot remains informative, and the team gets a precise next question instead of a success claim that the present data cannot establish.
END REFERENCE

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TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 04: Metrology, SPC, and Yield Learning
Original fictional case: Yield engineer Ravi presents a pilot lot with 92 passing die out of 100 tested, compared with a reference lot with 900 passing die out of 1,000 tested. The product mixes differ, and no controlled comparison or statistical significance assessment has been completed. Manager Elena wants to announce that a process change caused a two-percent yield improvement. The team also has no time-ordered control-chart analysis supporting a stability claim. Ravi must preserve the useful observations while correcting the causal, percentage, and stability language.
Language workshop: Two percentage points, not a proven process gain
Communication goal: Report yield with counts and comparison limits, and distinguish product acceptance from evidence about process stability.
Language guidance: The pilot has 92% yield and the reference 90%. The difference is 2 percentage points, or about 2.22% relative to 90%. Different product mixes and sample sizes mean this observation alone does not establish a causal improvement or statistical significance.
Useful expressions (preserve the supplied facts): The pilot passed 92 of 100 tested die. / The reference passed 900 of 1,000 tested die. / The observed difference is two percentage points. / Relative to 90%, that is approximately 2.22%. / The two lots have different product mixes. / The process change is not isolated by this comparison. / Statistical significance has not been assessed. / Compare relevant product groups on a consistent basis. / Control limits and specification limits serve different purposes. / Which time-ordered evidence supports the stability claim? / State the subgrouping and monitoring rules. / A control signal warrants investigation under the defined procedure. / The signal does not identify its own cause. / The pilot result is encouraging but limited. / Confirm the measurement and test basis before combining data. / Report the counts, observed difference, limitations, and next analysis.
Vocabulary: metrology: The science and practice of measurement. / electrical yield: The proportion meeting defined electrical test criteria. / pass count: The number of tested items meeting the stated criteria. / tested population: The set of items included in a reported test result. / denominator: The total used as the base of a fraction or percentage. / product mix: The composition of different products in a dataset. / pilot lot: A limited production lot used to evaluate a process or product. / reference lot: A lot used as a stated comparison basis. / percentage point: A unit for the absolute difference between percentages. / relative change: A change divided by its specified starting value. / confounding factor: A factor that prevents clean attribution of an observed relationship. / stratification: Separating data into relevant comparable groups. / SPC: Statistical process control, using data to monitor process behavior. / control chart: A time-ordered chart with a defined process-monitoring method. / control limit: A monitoring boundary derived under a stated process model or method. / specification limit: A defined product or process acceptance boundary. / common-cause variation: Variation inherent in the currently defined process system. / special-cause variation: Variation associated with a nonroutine identifiable influence. / control signal: A result meeting a defined rule for investigation on a control chart. / process stability: Consistent statistical behavior under the defined monitoring basis. / subgroup: A defined set of observations grouped for process analysis. / measurement system: The instruments, methods, people, and conditions producing measurements. / yield learning: Investigation that improves understanding of yield losses and drivers. / causal attribution: Assigning an observed effect to a particular cause.
Speaking task: Check the answers. Read both pass counts and denominators before reading their percentages. Switch roles. Read turns 5-16, emphasizing percentage points, product mix, and the two types of limits. Complete and check the transfer. Read the corrected exchange without turning the observed difference into a causal claim.
Partner: Elena: Yield program manager / Ravi: Yield engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A trial passes 48 of 50 tested die, or 96%. A reference passes 450 of 500, or 90%. Product mixes differ, and no causal analysis is complete.
Model for comparison AFTER my attempt, not a response to give me first: Elena: We also need to make sure the measurements and test criteria are consistent before combining records. Otherwise the next comparison could carry a different hidden change.
Ravi: Check the measurement system and test basis. Clear denominators are essential, but they do not solve inconsistencies in how observations were produced or classified.
Elena: The revised update will report the counts, the two-point difference, and the changed product mix. It will leave significance, stability, and causality unclaimed pending the appropriate analysis.
Ravi: That supports yield learning. The pilot remains informative, and the team gets a precise next question instead of a success claim that the present data cannot establish.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 05: Defect Density and Cleanroom Contamination
Original fictional case: Inspection engineer Hana and contamination-control engineer Oscar review a note saying cleanroom problem. The underlying record contains 24 particle-like detections over 200 square centimeters inspected on wafers from lot P8 after tool C2 between 9 and 10 a.m. The map shows an edge cluster. No comparable pre-process scan exists, defect review is incomplete, and no source is confirmed. The lot is held under the local procedure. The team must distinguish detections, confirmed defects, added defects, and airborne particle measurements.
Language workshop: Twenty-four detections are not a confirmed source
Communication goal: Describe inspection findings with location, area, timing, and classification while avoiding premature contamination-source claims.
Language guidance: The observed detection density is 24 divided by 200, or 0.12 detections per square centimeter. Do not call it a confirmed killer-defect density. Classification is incomplete, and no comparable pre-scan establishes how many detections were introduced by C2.
Useful expressions (preserve the supplied facts): The record shows particle-like surface detections, not a confirmed cleanroom source. / There were 24 detections over 200 square centimeters inspected. / That is 0.12 detections per square centimeter. / The wafer map shows an edge cluster. / These records follow C2 between 9 and 10 a.m. / Defect classification remains incomplete. / We lack a comparable pre-process scan. / Surface detections are not airborne particle counts. / Were the inspection settings and size threshold consistent? / The spatial signature does not confirm the source. / Link the map to the lot, wafers, and process history. / P8 remains held under the local procedure. / Review the detections and relevant exposure history. / Not every flagged feature is a confirmed killer defect. / Which material is included in the current containment? / Report observations, limits, containment status, and investigation ownership.
Vocabulary: inspection detection: A feature flagged by an inspection method for assessment. / defect review: Examination used to classify and interpret detected features. / defect density: Defects per unit area on a stated counting and inspection basis. / inspected area: The surface area included in an inspection result. / particle-like signature: An observed appearance consistent with a particle, pending review. / nuisance detection: A flagged feature not relevant to the defect concern being assessed. / killer defect: A defect that causes functional failure in its particular context. / defect classification: Assignment of detected features to defined categories. / wafer map: A spatial representation of results on a wafer. / edge cluster: A concentration of observations near a wafer's edge. / spatial signature: A location pattern in measured or inspected results. / added defect: A defect introduced between comparable inspection points. / pre-process scan: Inspection performed before a specified process step. / post-process scan: Inspection performed after a specified process step. / airborne particle count: A count of particles in a defined air sample or volume. / surface contamination: Unwanted material present on a surface. / cross-contamination: Transfer of unwanted material between areas, items, or processes. / contamination source: The origin of unwanted material. / particle excursion: An unusual particle-related result under defined monitoring rules. / inspection sensitivity: The ability of an inspection method to detect specified features. / size threshold: The size boundary used for counting or classifying features. / exposure history: The record of relevant environments and handling encountered. / suspect interval: A defined period being examined for possible affected material. / containment scope: The material or operations covered by a temporary restriction.
Speaking task: Check the answers. Read 24 detections over 200 square centimeters and the resulting density aloud. Switch roles for turns 5-14. Keep the edge pattern, possible source, and surface-versus-air distinction explicit. Complete and check the transfer. Read the evidence requests without naming an unconfirmed contamination source.
Partner: Hana: Inspection engineer / Oscar: Contamination-control engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A post-process scan flags 12 features over 100 square centimeters. Classification is pending, and no comparable pre-process scan exists. No contamination source is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Hana: We can reconstruct the lot's recent handling and process history alongside the spatial pattern. That should help distinguish possible explanations and identify useful follow-up evidence.
Oscar: Review the exposure history. It can guide source investigation, but a shared tool or time interval is not enough on its own to establish the origin.
Hana: The corrected note will give the count, area, edge pattern, interval, and incomplete classification. It will state that introduction by C2 and an airborne source are unconfirmed.
Oscar: That keeps the contamination source question open on an accurate basis. We can investigate efficiently while preserving the distinction between an observation, a hypothesis, and a confirmed cause.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 05: Defect Density and Cleanroom Contamination
Original fictional case: Inspection engineer Hana and contamination-control engineer Oscar review a note saying cleanroom problem. The underlying record contains 24 particle-like detections over 200 square centimeters inspected on wafers from lot P8 after tool C2 between 9 and 10 a.m. The map shows an edge cluster. No comparable pre-process scan exists, defect review is incomplete, and no source is confirmed. The lot is held under the local procedure. The team must distinguish detections, confirmed defects, added defects, and airborne particle measurements.
Language workshop: Twenty-four detections are not a confirmed source
Communication goal: Describe inspection findings with location, area, timing, and classification while avoiding premature contamination-source claims.
Language guidance: The observed detection density is 24 divided by 200, or 0.12 detections per square centimeter. Do not call it a confirmed killer-defect density. Classification is incomplete, and no comparable pre-scan establishes how many detections were introduced by C2.
Useful expressions (preserve the supplied facts): The record shows particle-like surface detections, not a confirmed cleanroom source. / There were 24 detections over 200 square centimeters inspected. / That is 0.12 detections per square centimeter. / The wafer map shows an edge cluster. / These records follow C2 between 9 and 10 a.m. / Defect classification remains incomplete. / We lack a comparable pre-process scan. / Surface detections are not airborne particle counts. / Were the inspection settings and size threshold consistent? / The spatial signature does not confirm the source. / Link the map to the lot, wafers, and process history. / P8 remains held under the local procedure. / Review the detections and relevant exposure history. / Not every flagged feature is a confirmed killer defect. / Which material is included in the current containment? / Report observations, limits, containment status, and investigation ownership.
Vocabulary: inspection detection: A feature flagged by an inspection method for assessment. / defect review: Examination used to classify and interpret detected features. / defect density: Defects per unit area on a stated counting and inspection basis. / inspected area: The surface area included in an inspection result. / particle-like signature: An observed appearance consistent with a particle, pending review. / nuisance detection: A flagged feature not relevant to the defect concern being assessed. / killer defect: A defect that causes functional failure in its particular context. / defect classification: Assignment of detected features to defined categories. / wafer map: A spatial representation of results on a wafer. / edge cluster: A concentration of observations near a wafer's edge. / spatial signature: A location pattern in measured or inspected results. / added defect: A defect introduced between comparable inspection points. / pre-process scan: Inspection performed before a specified process step. / post-process scan: Inspection performed after a specified process step. / airborne particle count: A count of particles in a defined air sample or volume. / surface contamination: Unwanted material present on a surface. / cross-contamination: Transfer of unwanted material between areas, items, or processes. / contamination source: The origin of unwanted material. / particle excursion: An unusual particle-related result under defined monitoring rules. / inspection sensitivity: The ability of an inspection method to detect specified features. / size threshold: The size boundary used for counting or classifying features. / exposure history: The record of relevant environments and handling encountered. / suspect interval: A defined period being examined for possible affected material. / containment scope: The material or operations covered by a temporary restriction.
Speaking task: Check the answers. Read 24 detections over 200 square centimeters and the resulting density aloud. Switch roles for turns 5-14. Keep the edge pattern, possible source, and surface-versus-air distinction explicit. Complete and check the transfer. Read the evidence requests without naming an unconfirmed contamination source.
Partner: Hana: Inspection engineer / Oscar: Contamination-control engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A post-process scan flags 12 features over 100 square centimeters. Classification is pending, and no comparable pre-process scan exists. No contamination source is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Hana: We can reconstruct the lot's recent handling and process history alongside the spatial pattern. That should help distinguish possible explanations and identify useful follow-up evidence.
Oscar: Review the exposure history. It can guide source investigation, but a shared tool or time interval is not enough on its own to establish the origin.
Hana: The corrected note will give the count, area, edge pattern, interval, and incomplete classification. It will state that introduction by C2 and an airborne source are unconfirmed.
Oscar: That keeps the contamination source question open on an accurate basis. We can investigate efficiently while preserving the distinction between an observation, a hypothesis, and a confirmed cause.
END REFERENCE

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TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 05: Defect Density and Cleanroom Contamination
Original fictional case: Inspection engineer Hana and contamination-control engineer Oscar review a note saying cleanroom problem. The underlying record contains 24 particle-like detections over 200 square centimeters inspected on wafers from lot P8 after tool C2 between 9 and 10 a.m. The map shows an edge cluster. No comparable pre-process scan exists, defect review is incomplete, and no source is confirmed. The lot is held under the local procedure. The team must distinguish detections, confirmed defects, added defects, and airborne particle measurements.
Language workshop: Twenty-four detections are not a confirmed source
Communication goal: Describe inspection findings with location, area, timing, and classification while avoiding premature contamination-source claims.
Language guidance: The observed detection density is 24 divided by 200, or 0.12 detections per square centimeter. Do not call it a confirmed killer-defect density. Classification is incomplete, and no comparable pre-scan establishes how many detections were introduced by C2.
Useful expressions (preserve the supplied facts): The record shows particle-like surface detections, not a confirmed cleanroom source. / There were 24 detections over 200 square centimeters inspected. / That is 0.12 detections per square centimeter. / The wafer map shows an edge cluster. / These records follow C2 between 9 and 10 a.m. / Defect classification remains incomplete. / We lack a comparable pre-process scan. / Surface detections are not airborne particle counts. / Were the inspection settings and size threshold consistent? / The spatial signature does not confirm the source. / Link the map to the lot, wafers, and process history. / P8 remains held under the local procedure. / Review the detections and relevant exposure history. / Not every flagged feature is a confirmed killer defect. / Which material is included in the current containment? / Report observations, limits, containment status, and investigation ownership.
Vocabulary: inspection detection: A feature flagged by an inspection method for assessment. / defect review: Examination used to classify and interpret detected features. / defect density: Defects per unit area on a stated counting and inspection basis. / inspected area: The surface area included in an inspection result. / particle-like signature: An observed appearance consistent with a particle, pending review. / nuisance detection: A flagged feature not relevant to the defect concern being assessed. / killer defect: A defect that causes functional failure in its particular context. / defect classification: Assignment of detected features to defined categories. / wafer map: A spatial representation of results on a wafer. / edge cluster: A concentration of observations near a wafer's edge. / spatial signature: A location pattern in measured or inspected results. / added defect: A defect introduced between comparable inspection points. / pre-process scan: Inspection performed before a specified process step. / post-process scan: Inspection performed after a specified process step. / airborne particle count: A count of particles in a defined air sample or volume. / surface contamination: Unwanted material present on a surface. / cross-contamination: Transfer of unwanted material between areas, items, or processes. / contamination source: The origin of unwanted material. / particle excursion: An unusual particle-related result under defined monitoring rules. / inspection sensitivity: The ability of an inspection method to detect specified features. / size threshold: The size boundary used for counting or classifying features. / exposure history: The record of relevant environments and handling encountered. / suspect interval: A defined period being examined for possible affected material. / containment scope: The material or operations covered by a temporary restriction.
Speaking task: Check the answers. Read 24 detections over 200 square centimeters and the resulting density aloud. Switch roles for turns 5-14. Keep the edge pattern, possible source, and surface-versus-air distinction explicit. Complete and check the transfer. Read the evidence requests without naming an unconfirmed contamination source.
Partner: Hana: Inspection engineer / Oscar: Contamination-control engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A post-process scan flags 12 features over 100 square centimeters. Classification is pending, and no comparable pre-process scan exists. No contamination source is confirmed.
Model for comparison AFTER my attempt, not a response to give me first: Hana: We can reconstruct the lot's recent handling and process history alongside the spatial pattern. That should help distinguish possible explanations and identify useful follow-up evidence.
Oscar: Review the exposure history. It can guide source investigation, but a shared tool or time interval is not enough on its own to establish the origin.
Hana: The corrected note will give the count, area, edge pattern, interval, and incomplete classification. It will state that introduction by C2 and an airborne source are unconfirmed.
Oscar: That keeps the contamination source question open on an accurate basis. We can investigate efficiently while preserving the distinction between an observation, a hypothesis, and a confirmed cause.
END REFERENCE

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TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 06: Equipment Uptime, Recipes, and Tool Matching
Original fictional case: Equipment engineer Victor and process engineer Asha compare tools A and B using the same identified R7 recipe and an agreed comparable measurement basis. Their film-thickness sample means are 98 nm and 102 nm. The local mean specification is 95 to 105 nm, but the tool-matching criterion requires the means to differ by no more than 2 nm. Tool B was available for 900 of a defined 1,000-minute window. A colleague uses the identical recipe and 90% availability to claim B is an approved interchangeable backup. No transfer approval is recorded.
Language workshop: Same recipe, different means
Communication goal: Distinguish recipe identity, specification performance, tool matching, and equipment availability in a transfer discussion.
Language guidance: Both sample means meet the local 95-to-105 nm mean specification. Their difference is 4 nm, so they fail the separate 2 nm matching criterion. This does not establish the status of every individual wafer, whose measurements are not supplied.
Useful expressions (preserve the supplied facts): Both tools used the identified R7 revision. / Identical setpoints do not prove identical performance. / A measured 98 nm and B measured 102 nm. / The means are 4 nm apart. / Matching allows no more than a 2 nm difference. / Both means are in spec, but the pair is not matched. / These are sample means, not every individual wafer result. / Were the relevant chamber conditions documented? / Confirm the calibration and measurement basis. / B was available for 900 of the defined 1,000 minutes. / That 90% figure is availability, not yield. / Backup status needs the required qualification and approval. / Review the observed offset before proposing a correction. / Do not change the recipe from this comparison alone. / Which process, product, and tool combination is proposed? / Report specification, matching, availability, and release separately.
Vocabulary: tool matching: Demonstrating comparable tool performance against defined criteria. / chamber matching: Demonstrating comparable performance between process chambers. / recipe revision: The identified version of a process recipe. / setpoint: A commanded target value for a controlled variable. / actual value: The measured or achieved value rather than the commanded target. / equipment state: The recorded operational condition of a tool. / availability: The share of a defined time basis during which equipment is available. / utilization: The share of a stated time basis during which equipment is used. / scheduled downtime: Planned time when equipment is unavailable for the defined use. / unscheduled downtime: Unplanned time when equipment is unavailable. / preventive maintenance: Planned work intended to reduce equipment failures or deterioration. / corrective maintenance: Work to restore equipment after a fault or failure. / MTBF: Mean time between failures under a stated operating and event definition. / MTTR: Mean time to repair or restore under the stated local definition. / chamber condition: The physical and operating state of a process chamber. / seasoning: Controlled processing used to establish a required chamber condition. / calibration status: The current documented state of required measurement calibration. / qualification wafer: A wafer used to assess a specified tool or process condition. / monitor wafer: A wafer used to track selected process or tool behavior. / matching criterion: A defined limit for acceptable performance difference. / process transfer: Moving a defined process to another tool or location. / backup tool: An alternative tool intended for use under defined conditions. / release status: Whether the required authorization for a specified use is in place. / offset correction: A controlled adjustment addressing a measured systematic difference.
Speaking task: Check the answers. Read the 98 nm and 102 nm means, then the separate specification and matching limits. Switch roles. Read the availability exchange without replacing availability with yield or utilization. Complete and check the transfer. Read each claim with its own criterion and keep approval pending.
Partner: Victor: Equipment engineer / Asha: Process engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Two tools have sample means of 50 and 53 nm. Both meet a mean specification of 48 to 55 nm. Matching allows at most 1 nm difference. Transfer approval is pending.
Model for comparison AFTER my attempt, not a response to give me first: Victor: The backup proposal remains useful because capacity is constrained, but it needs the appropriate technical assessment and approval before production relies on it.
Asha: Treat it as a process transfer decision. The defined scope, matching evidence, and required authorization must be clear instead of being inferred from the existence of an alternative tool.
Victor: I will revise the planning note to separate the passing means, failed matching comparison, ninety-percent availability, and missing approval. It will no longer call B interchangeable.
Asha: That preserves the release status accurately. We can pursue the backup option while making its unresolved requirements visible to the people planning production.
END REFERENCE

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TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 06: Equipment Uptime, Recipes, and Tool Matching
Original fictional case: Equipment engineer Victor and process engineer Asha compare tools A and B using the same identified R7 recipe and an agreed comparable measurement basis. Their film-thickness sample means are 98 nm and 102 nm. The local mean specification is 95 to 105 nm, but the tool-matching criterion requires the means to differ by no more than 2 nm. Tool B was available for 900 of a defined 1,000-minute window. A colleague uses the identical recipe and 90% availability to claim B is an approved interchangeable backup. No transfer approval is recorded.
Language workshop: Same recipe, different means
Communication goal: Distinguish recipe identity, specification performance, tool matching, and equipment availability in a transfer discussion.
Language guidance: Both sample means meet the local 95-to-105 nm mean specification. Their difference is 4 nm, so they fail the separate 2 nm matching criterion. This does not establish the status of every individual wafer, whose measurements are not supplied.
Useful expressions (preserve the supplied facts): Both tools used the identified R7 revision. / Identical setpoints do not prove identical performance. / A measured 98 nm and B measured 102 nm. / The means are 4 nm apart. / Matching allows no more than a 2 nm difference. / Both means are in spec, but the pair is not matched. / These are sample means, not every individual wafer result. / Were the relevant chamber conditions documented? / Confirm the calibration and measurement basis. / B was available for 900 of the defined 1,000 minutes. / That 90% figure is availability, not yield. / Backup status needs the required qualification and approval. / Review the observed offset before proposing a correction. / Do not change the recipe from this comparison alone. / Which process, product, and tool combination is proposed? / Report specification, matching, availability, and release separately.
Vocabulary: tool matching: Demonstrating comparable tool performance against defined criteria. / chamber matching: Demonstrating comparable performance between process chambers. / recipe revision: The identified version of a process recipe. / setpoint: A commanded target value for a controlled variable. / actual value: The measured or achieved value rather than the commanded target. / equipment state: The recorded operational condition of a tool. / availability: The share of a defined time basis during which equipment is available. / utilization: The share of a stated time basis during which equipment is used. / scheduled downtime: Planned time when equipment is unavailable for the defined use. / unscheduled downtime: Unplanned time when equipment is unavailable. / preventive maintenance: Planned work intended to reduce equipment failures or deterioration. / corrective maintenance: Work to restore equipment after a fault or failure. / MTBF: Mean time between failures under a stated operating and event definition. / MTTR: Mean time to repair or restore under the stated local definition. / chamber condition: The physical and operating state of a process chamber. / seasoning: Controlled processing used to establish a required chamber condition. / calibration status: The current documented state of required measurement calibration. / qualification wafer: A wafer used to assess a specified tool or process condition. / monitor wafer: A wafer used to track selected process or tool behavior. / matching criterion: A defined limit for acceptable performance difference. / process transfer: Moving a defined process to another tool or location. / backup tool: An alternative tool intended for use under defined conditions. / release status: Whether the required authorization for a specified use is in place. / offset correction: A controlled adjustment addressing a measured systematic difference.
Speaking task: Check the answers. Read the 98 nm and 102 nm means, then the separate specification and matching limits. Switch roles. Read the availability exchange without replacing availability with yield or utilization. Complete and check the transfer. Read each claim with its own criterion and keep approval pending.
Partner: Victor: Equipment engineer / Asha: Process engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Two tools have sample means of 50 and 53 nm. Both meet a mean specification of 48 to 55 nm. Matching allows at most 1 nm difference. Transfer approval is pending.
Model for comparison AFTER my attempt, not a response to give me first: Victor: The backup proposal remains useful because capacity is constrained, but it needs the appropriate technical assessment and approval before production relies on it.
Asha: Treat it as a process transfer decision. The defined scope, matching evidence, and required authorization must be clear instead of being inferred from the existence of an alternative tool.
Victor: I will revise the planning note to separate the passing means, failed matching comparison, ninety-percent availability, and missing approval. It will no longer call B interchangeable.
Asha: That preserves the release status accurately. We can pursue the backup option while making its unresolved requirements visible to the people planning production.
END REFERENCE

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TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 06: Equipment Uptime, Recipes, and Tool Matching
Original fictional case: Equipment engineer Victor and process engineer Asha compare tools A and B using the same identified R7 recipe and an agreed comparable measurement basis. Their film-thickness sample means are 98 nm and 102 nm. The local mean specification is 95 to 105 nm, but the tool-matching criterion requires the means to differ by no more than 2 nm. Tool B was available for 900 of a defined 1,000-minute window. A colleague uses the identical recipe and 90% availability to claim B is an approved interchangeable backup. No transfer approval is recorded.
Language workshop: Same recipe, different means
Communication goal: Distinguish recipe identity, specification performance, tool matching, and equipment availability in a transfer discussion.
Language guidance: Both sample means meet the local 95-to-105 nm mean specification. Their difference is 4 nm, so they fail the separate 2 nm matching criterion. This does not establish the status of every individual wafer, whose measurements are not supplied.
Useful expressions (preserve the supplied facts): Both tools used the identified R7 revision. / Identical setpoints do not prove identical performance. / A measured 98 nm and B measured 102 nm. / The means are 4 nm apart. / Matching allows no more than a 2 nm difference. / Both means are in spec, but the pair is not matched. / These are sample means, not every individual wafer result. / Were the relevant chamber conditions documented? / Confirm the calibration and measurement basis. / B was available for 900 of the defined 1,000 minutes. / That 90% figure is availability, not yield. / Backup status needs the required qualification and approval. / Review the observed offset before proposing a correction. / Do not change the recipe from this comparison alone. / Which process, product, and tool combination is proposed? / Report specification, matching, availability, and release separately.
Vocabulary: tool matching: Demonstrating comparable tool performance against defined criteria. / chamber matching: Demonstrating comparable performance between process chambers. / recipe revision: The identified version of a process recipe. / setpoint: A commanded target value for a controlled variable. / actual value: The measured or achieved value rather than the commanded target. / equipment state: The recorded operational condition of a tool. / availability: The share of a defined time basis during which equipment is available. / utilization: The share of a stated time basis during which equipment is used. / scheduled downtime: Planned time when equipment is unavailable for the defined use. / unscheduled downtime: Unplanned time when equipment is unavailable. / preventive maintenance: Planned work intended to reduce equipment failures or deterioration. / corrective maintenance: Work to restore equipment after a fault or failure. / MTBF: Mean time between failures under a stated operating and event definition. / MTTR: Mean time to repair or restore under the stated local definition. / chamber condition: The physical and operating state of a process chamber. / seasoning: Controlled processing used to establish a required chamber condition. / calibration status: The current documented state of required measurement calibration. / qualification wafer: A wafer used to assess a specified tool or process condition. / monitor wafer: A wafer used to track selected process or tool behavior. / matching criterion: A defined limit for acceptable performance difference. / process transfer: Moving a defined process to another tool or location. / backup tool: An alternative tool intended for use under defined conditions. / release status: Whether the required authorization for a specified use is in place. / offset correction: A controlled adjustment addressing a measured systematic difference.
Speaking task: Check the answers. Read the 98 nm and 102 nm means, then the separate specification and matching limits. Switch roles. Read the availability exchange without replacing availability with yield or utilization. Complete and check the transfer. Read each claim with its own criterion and keep approval pending.
Partner: Victor: Equipment engineer / Asha: Process engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: Two tools have sample means of 50 and 53 nm. Both meet a mean specification of 48 to 55 nm. Matching allows at most 1 nm difference. Transfer approval is pending.
Model for comparison AFTER my attempt, not a response to give me first: Victor: The backup proposal remains useful because capacity is constrained, but it needs the appropriate technical assessment and approval before production relies on it.
Asha: Treat it as a process transfer decision. The defined scope, matching evidence, and required authorization must be clear instead of being inferred from the existence of an alternative tool.
Victor: I will revise the planning note to separate the passing means, failed matching comparison, ninety-percent availability, and missing approval. It will no longer call B interchangeable.
Asha: That preserves the release status accurately. We can pursue the backup option while making its unresolved requirements visible to the people planning production.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Retrieve occupational vocabulary
1. Select four terms from the reference. Explain each in plain English, give two natural collocations and quote or create a short workplace example. Label invented examples. Contrast each term with a plausible confusable term; acknowledge regional variation.
2. Present one role-labelled exchange with one missing word or phrase and four choices A-D. Exactly one choice must fit the stated facts and grammar. Stop and wait for my answer before revealing it.
3. Explain all four options, then invite me to read the completed exchange aloud. Offer a sentence frame for optional spoken practice, never an open-ended writing assignment.
4. Repeat for the other three terms, one question at a time. Vary the correct letter and the situation; preserve the reference facts. If a choice is ambiguous, replace the item.
5. Finish with two new four-choice collocation questions for later review, with a clearly separate answer key. Do not claim to schedule a reminder.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 07: Packaging, Test, and Reliability Qualification
Original fictional case: Product engineer Diego and reliability engineer Mei review package Q7. Its approved fictional qualification plan requires temperature cycling, high-temperature operating life testing, a highly accelerated stress test, and final review of the evidence. Temperature cycling has passed under its protocol. Operating-life testing is running, and the accelerated stress test has not started. No final approval or accepted substitution is recorded. A customer slide nevertheless says qualification complete. The team must replace that headline with a precise status without describing open tests as failures.
Language workshop: One completed test is not complete qualification
Communication goal: Explain qualification status test by test, preserve configuration scope, and correct an overbroad customer claim.
Language guidance: This case uses a specific fictional plan, not a universal mandatory three-test list. One passing test supports its defined result. It does not complete the two open tests or the final review, and it does not establish every application-specific reliability claim.
Useful expressions (preserve the supplied facts): Q7 passed temperature cycling under the stated protocol. / HTOL is still running. / HAST has not started. / The approved plan requires all three tests and final review. / Qualification is in progress, not complete. / No result is available for the unstarted test. / Which package construction does the evidence cover? / Is this the approved qualification vehicle? / Are the required preconditioning records included? / Final test is not a substitute for every reliability stress. / Similarity needs an accepted technical rationale. / A desired customer date does not remove a required test. / Final qualification approval is not recorded. / Identify what each completed test actually addresses. / The next report will distinguish completed, running, and unstarted tests. / Keep release decisions with the authorized review process.
Vocabulary: package substrate: The package structure carrying connections between die and external interfaces. / wire bonding: Forming electrical connections using fine wires. / flip-chip attachment: Connecting a die face-down through conductive bumps or pillars. / underfill: Material placed around interconnections to support a package assembly. / mold compound: Encapsulating material used in many semiconductor packages. / solder joint: A soldered electrical and mechanical connection. / BGA: Ball grid array, a package connection format using an array of solder balls. / QFN: Quad flat no-lead, a package format with exposed connection lands. / SiP: System in package, integrating multiple functions or components in one package. / TSV: Through-silicon via, a conductive connection passing through silicon. / package construction: The materials and structural arrangement of a package. / moisture sensitivity: Susceptibility to moisture-related effects under stated handling or stress conditions. / delamination: Separation between bonded material layers. / thermal cycling: Repeated temperature changes under a specified test profile. / HTOL: High-temperature operating life, an operating stress test under defined conditions. / HAST: Highly accelerated stress test, a defined accelerated humidity-related stress test. / preconditioning: Defined preparation before a test to represent relevant handling or assembly stresses. / qualification plan: The defined tests, evidence, scope, and approval requirements for qualification. / qualification vehicle: The selected device or structure used to support qualification evidence. / test coverage: The requirements or failure concerns addressed by the performed tests. / failure analysis: Investigation of failed samples and their causes. / qualification by similarity: Use of justified related evidence under an accepted qualification approach. / final test: Electrical testing at the defined final product stage. / qualification approval: Authorized acceptance of the required qualification evidence.
Speaking task: Check the answers. Read the three test statuses, expanding HTOL and HAST using the vocabulary pages. Switch roles for turns 9-20. Keep construction, preparation, related evidence, and final approval distinct. Complete and check the transfer. Read the pending work without changing it into either a pass or a failure.
Partner: Diego: Product engineer / Mei: Reliability engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A fictional package plan requires tests A, B, and C plus final review. A passed, B is running, and C has not started. No substitution or final approval is recorded.
Model for comparison AFTER my attempt, not a response to give me first: Diego: We also have final electrical test records, but those should not be presented as though they address every stress-related concern in the qualification plan.
Mei: Correct. Test coverage differs between production checks and reliability assessments. Each result needs to be connected to what it actually evaluates, not treated as interchangeable evidence.
Diego: I will change the headline to qualification in progress, list the three statuses, and keep the configuration and outstanding review visible. We will not announce release from this slide.
Mei: That preserves qualification approval as a separate decision. The next update can show genuine progress while keeping the unresolved tests and final review clear.
END REFERENCE

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TASK: Choose grammar that preserves the meaning
1. Use the lesson's language workshop, or one actual sentence from the dialogue, to explain a single grammar distinction in no more than 90 words. Show how it affects timing, certainty, responsibility or politeness.
2. Give one brief occupational exchange containing a gap and four complete options A-D. Supply enough context for exactly one answer. Keep distractors plausible; distinguish grammar errors from wording that changes the facts. Stop and wait.
3. Explain why each choice fits or fails, then ask me to read the completed exchange aloud. Do not request a draft, original written sentence or essay.
4. Repeat with three new exchanges, one at a time, moving from recognition to a more subtle meaning contrast. Do not copy the published checks. Label invented variations and do not turn uncertainty into a promise.
5. End with a short contrast table and two supported spoken turns using supplied frames. Accept accurate alternatives in oral practice; acknowledge and replace ambiguous multiple-choice items.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 07: Packaging, Test, and Reliability Qualification
Original fictional case: Product engineer Diego and reliability engineer Mei review package Q7. Its approved fictional qualification plan requires temperature cycling, high-temperature operating life testing, a highly accelerated stress test, and final review of the evidence. Temperature cycling has passed under its protocol. Operating-life testing is running, and the accelerated stress test has not started. No final approval or accepted substitution is recorded. A customer slide nevertheless says qualification complete. The team must replace that headline with a precise status without describing open tests as failures.
Language workshop: One completed test is not complete qualification
Communication goal: Explain qualification status test by test, preserve configuration scope, and correct an overbroad customer claim.
Language guidance: This case uses a specific fictional plan, not a universal mandatory three-test list. One passing test supports its defined result. It does not complete the two open tests or the final review, and it does not establish every application-specific reliability claim.
Useful expressions (preserve the supplied facts): Q7 passed temperature cycling under the stated protocol. / HTOL is still running. / HAST has not started. / The approved plan requires all three tests and final review. / Qualification is in progress, not complete. / No result is available for the unstarted test. / Which package construction does the evidence cover? / Is this the approved qualification vehicle? / Are the required preconditioning records included? / Final test is not a substitute for every reliability stress. / Similarity needs an accepted technical rationale. / A desired customer date does not remove a required test. / Final qualification approval is not recorded. / Identify what each completed test actually addresses. / The next report will distinguish completed, running, and unstarted tests. / Keep release decisions with the authorized review process.
Vocabulary: package substrate: The package structure carrying connections between die and external interfaces. / wire bonding: Forming electrical connections using fine wires. / flip-chip attachment: Connecting a die face-down through conductive bumps or pillars. / underfill: Material placed around interconnections to support a package assembly. / mold compound: Encapsulating material used in many semiconductor packages. / solder joint: A soldered electrical and mechanical connection. / BGA: Ball grid array, a package connection format using an array of solder balls. / QFN: Quad flat no-lead, a package format with exposed connection lands. / SiP: System in package, integrating multiple functions or components in one package. / TSV: Through-silicon via, a conductive connection passing through silicon. / package construction: The materials and structural arrangement of a package. / moisture sensitivity: Susceptibility to moisture-related effects under stated handling or stress conditions. / delamination: Separation between bonded material layers. / thermal cycling: Repeated temperature changes under a specified test profile. / HTOL: High-temperature operating life, an operating stress test under defined conditions. / HAST: Highly accelerated stress test, a defined accelerated humidity-related stress test. / preconditioning: Defined preparation before a test to represent relevant handling or assembly stresses. / qualification plan: The defined tests, evidence, scope, and approval requirements for qualification. / qualification vehicle: The selected device or structure used to support qualification evidence. / test coverage: The requirements or failure concerns addressed by the performed tests. / failure analysis: Investigation of failed samples and their causes. / qualification by similarity: Use of justified related evidence under an accepted qualification approach. / final test: Electrical testing at the defined final product stage. / qualification approval: Authorized acceptance of the required qualification evidence.
Speaking task: Check the answers. Read the three test statuses, expanding HTOL and HAST using the vocabulary pages. Switch roles for turns 9-20. Keep construction, preparation, related evidence, and final approval distinct. Complete and check the transfer. Read the pending work without changing it into either a pass or a failure.
Partner: Diego: Product engineer / Mei: Reliability engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A fictional package plan requires tests A, B, and C plus final review. A passed, B is running, and C has not started. No substitution or final approval is recorded.
Model for comparison AFTER my attempt, not a response to give me first: Diego: We also have final electrical test records, but those should not be presented as though they address every stress-related concern in the qualification plan.
Mei: Correct. Test coverage differs between production checks and reliability assessments. Each result needs to be connected to what it actually evaluates, not treated as interchangeable evidence.
Diego: I will change the headline to qualification in progress, list the three statuses, and keep the configuration and outstanding review visible. We will not announce release from this slide.
Mei: That preserves qualification approval as a separate decision. The next update can show genuine progress while keeping the unresolved tests and final review clear.
END REFERENCE

Copy the full text below into your preferred AI. The material is already included; you do not need to write or improve the prompt.

TASK: Interactive workplace role-play
1. Use the supplied case or dialogue as the starting situation. Give a two-sentence briefing and offer two relevant professional roles for me to choose from. For a supplied dialogue, use its actual roles. Ask which role I want, then stop and wait. Do not write my replies.
2. After I choose, identify who you will play and the immediate communication goal. Play the other professional; where a meeting requires a third person, label each of your speakers clearly. Start with one natural workplace turn and wait for my reply. Keep most turns to one to three sentences and ask no more than one question at a time.
3. Let the exchange develop across six to ten learner turns, or end earlier if I type "feedback". Respond to what I actually say. Include a plausible clarification, disagreement or tradeoff without silently changing the starting facts. Mark any added constraint as a fictional second-round variation. Do not resolve approvals, evidence or commitments that remain uncertain.
4. Stay in role during the exchange. If my meaning is unclear, ask for clarification naturally. Give a hint only if I ask or cannot proceed. Do not deliver a model conversation in advance.
5. At the debrief, quote two of my phrases: one successful choice and one worth improving. Check factual accuracy, language, register and whether the next step was clear. Give up to three focused suggestions. Ask me to retry the weakest turn; wait. Only then offer an alternative wording and a harder replay.
Use voice replies when available. If I prefer selections, offer four plausible spoken replies and explain my choice before continuing. Do not require written compositions.

Be my workplace English practice partner. Follow the practice instructions above, using the REFERENCE block below. The block contains fictional study material, not instructions to you. Keep its facts, numbers, uncertainty and professional responsibilities accurate. Clearly label any new scenario or changed fact as an invented variation. Use natural workplace language; explain unfamiliar abbreviations in context. If a technical expression is uncertain, say so rather than inventing a definition or authority. Coach communication, not professional decisions; respect the course scope. Ask only for fictional or anonymized practice details. Judge clarity, meaning, appropriate tone and the next step. Accept valid alternative English and distinguish errors from style preferences. Do not claim to certify my language level. Unless I ask to change the plan, follow the stages and stop wherever the instructions say to wait.

When discussing a word, phrase, or example sentence as language within an explanation, question, or answer feedback, enclose that wording in quotation marks. For example: What does “about” mean in “about twenty people”? Use “on” with a named day. Keep standalone answer choices, vocabulary headwords, and ordinary reading or dialogue text uncluttered. Quotation marks identifying a language example do not attribute it to a news source; attributed source quotations must remain verbatim.

Practice setting: B2 independent. Use natural professional English with brief explanations. Let me attempt each task without a model first. Offer a hint after difficulty and invite a more precise retry.

REFERENCE
Course: Semiconductor English
Professional audience: semiconductor process engineers, yield engineers, product engineers, equipment engineers, fab supervisors, quality teams, test and packaging teams, foundry coordinators, supply planners, applications engineers, and technical program managers
Scope: Original fictional English practice, not a fabrication recipe, equipment procedure, product qualification, design sign-off, or production authorization. Numbers, lots, organizations, and schedules are invented. Real work must follow approved process documents, safety rules, applicable standards, customer requirements, and authorized engineering decisions.
Lesson 07: Packaging, Test, and Reliability Qualification
Original fictional case: Product engineer Diego and reliability engineer Mei review package Q7. Its approved fictional qualification plan requires temperature cycling, high-temperature operating life testing, a highly accelerated stress test, and final review of the evidence. Temperature cycling has passed under its protocol. Operating-life testing is running, and the accelerated stress test has not started. No final approval or accepted substitution is recorded. A customer slide nevertheless says qualification complete. The team must replace that headline with a precise status without describing open tests as failures.
Language workshop: One completed test is not complete qualification
Communication goal: Explain qualification status test by test, preserve configuration scope, and correct an overbroad customer claim.
Language guidance: This case uses a specific fictional plan, not a universal mandatory three-test list. One passing test supports its defined result. It does not complete the two open tests or the final review, and it does not establish every application-specific reliability claim.
Useful expressions (preserve the supplied facts): Q7 passed temperature cycling under the stated protocol. / HTOL is still running. / HAST has not started. / The approved plan requires all three tests and final review. / Qualification is in progress, not complete. / No result is available for the unstarted test. / Which package construction does the evidence cover? / Is this the approved qualification vehicle? / Are the required preconditioning records included? / Final test is not a substitute for every reliability stress. / Similarity needs an accepted technical rationale. / A desired customer date does not remove a required test. / Final qualification approval is not recorded. / Identify what each completed test actually addresses. / The next report will distinguish completed, running, and unstarted tests. / Keep release decisions with the authorized review process.
Vocabulary: package substrate: The package structure carrying connections between die and external interfaces. / wire bonding: Forming electrical connections using fine wires. / flip-chip attachment: Connecting a die face-down through conductive bumps or pillars. / underfill: Material placed around interconnections to support a package assembly. / mold compound: Encapsulating material used in many semiconductor packages. / solder joint: A soldered electrical and mechanical connection. / BGA: Ball grid array, a package connection format using an array of solder balls. / QFN: Quad flat no-lead, a package format with exposed connection lands. / SiP: System in package, integrating multiple functions or components in one package. / TSV: Through-silicon via, a conductive connection passing through silicon. / package construction: The materials and structural arrangement of a package. / moisture sensitivity: Susceptibility to moisture-related effects under stated handling or stress conditions. / delamination: Separation between bonded material layers. / thermal cycling: Repeated temperature changes under a specified test profile. / HTOL: High-temperature operating life, an operating stress test under defined conditions. / HAST: Highly accelerated stress test, a defined accelerated humidity-related stress test. / preconditioning: Defined preparation before a test to represent relevant handling or assembly stresses. / qualification plan: The defined tests, evidence, scope, and approval requirements for qualification. / qualification vehicle: The selected device or structure used to support qualification evidence. / test coverage: The requirements or failure concerns addressed by the performed tests. / failure analysis: Investigation of failed samples and their causes. / qualification by similarity: Use of justified related evidence under an accepted qualification approach. / final test: Electrical testing at the defined final product stage. / qualification approval: Authorized acceptance of the required qualification evidence.
Speaking task: Check the answers. Read the three test statuses, expanding HTOL and HAST using the vocabulary pages. Switch roles for turns 9-20. Keep construction, preparation, related evidence, and final approval distinct. Complete and check the transfer. Read the pending work without changing it into either a pass or a failure.
Partner: Diego: Product engineer / Mei: Reliability engineer
Guided response task: Select supplied answers for the dialogue gaps. Check the explanations, then read the completed exchange aloud; no original writing is required.
Optional second-round challenge: A fictional package plan requires tests A, B, and C plus final review. A passed, B is running, and C has not started. No substitution or final approval is recorded.
Model for comparison AFTER my attempt, not a response to give me first: Diego: We also have final electrical test records, but those should not be presented as though they address every stress-related concern in the qualification plan.
Mei: Correct. Test coverage differs between production checks and reliability assessments. Each result needs to be connected to what it actually evaluates, not treated as interchangeable evidence.
Diego: I will change the headline to qualification in progress, list the three statuses, and keep the configuration and outstanding review visible. We will not announce release from this slide.
Mei: That preserves qualification approval as a separate decision. The next update can show genuine progress while keeping the unresolved tests and final review clear.
END REFERENCE