Yield and quality control

What is it called that shows yield improving over time as defect causes are analyzed and addressed after a new process is launched?

  1. ABathtub curve
  2. BYield learning curve
  3. CS-curve
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Answer: B. Yield learning curve

Right after a new process is launched, yield is low, and it gradually improves through repeated failure analysis and countermeasures. The yield learning curve shows this progression. Raising yield to a high level quickly is directly tied to a semiconductor maker's competitiveness.

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More Yield and quality control questions

  1. What is the purpose of evaluating manufacturing variation separately by factor, such as lot-to-lot, wafer-to-wafer and within-wafer?
  2. Which correctly describes the idea behind the quality management activity called 'Six Sigma'?
  3. On the same wafer, why does making chip area smaller greatly increase the number of good chips per wafer?
  4. Which control chart is used to control the fraction defective?
  5. What is the purpose of inspecting for defects after each step and extracting only the defects newly added since the previous step?