Yield and quality control

Which system manages which lot is at which step and tool, under what conditions it was processed and so on, directing and recording the production flow in a factory?

  1. ABIST
  2. BMES (manufacturing execution system)
  3. CEDA
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Answer: B. MES (manufacturing execution system)

An MES (manufacturing execution system) manages lot progress, equipment status, processing conditions (recipes) and work records, and directs which tool processes what next. It also forms the foundation for tracing manufacturing history (traceability).

  • A. BIST is built-in self-test circuitry on a chip.
  • B. Correct. It manages the factory's production flow.
  • C. EDA refers to circuit design tools.
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More Yield and quality control questions

  1. In sampling inspection, which judges an entire lot as accepted or rejected by inspecting a sample, which metric expresses the quality level considered acceptable?
  2. When analyzing yield data, which example correctly illustrates that "a correlation between two quantities does not mean one causes the other"?
  3. Which correctly describes efforts to raise yield by analyzing the large amounts of equipment data, metrology data and test results accumulated in a fab with machine learning and similar methods?
  4. Which yield model accounts for defects that occur clustered unevenly on the wafer?
  5. What is the quantity called that, for each type of defect found by inspection, gives the fraction of chips containing that defect that actually fail electrically?