Yield and quality control

A wafer has 600 chips and the yield is 80%. How many good chips are there?

  1. A120
  2. B480
  3. C520
Show answer and explanation

Answer: B. 480

The number of good chips is the number of chips × yield: 600 × 0.8 = 480. 120 is the number of defective chips.

Practice this topic Back to topic

More Yield and quality control questions

  1. If wafer process yield is 95% and wafer test yield is 90%, approximately what is the overall yield obtained by multiplying them?
  2. What is the system called that tracks each product's manufacturing history, needed to identify products that may have been affected when an abnormality is found?
  3. Which technique rejects chips that are within specification in test but show values far outside the distribution of the same lot?
  4. Which correctly describes the difference between the control limits of a control chart and a product's specification limits?
  5. What is the correct order of the PDCA cycle used in quality control and process improvement?