Testing and inspection

What is the two-dimensional chart called that summarizes pass/fail results while varying conditions such as supply voltage and operating frequency?

  1. APareto chart
  2. BWafer map
  3. CShmoo plot
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Answer: C. Shmoo plot

A shmoo plot shows, for example with operating frequency on the horizontal axis and supply voltage on the vertical axis, whether the test passed or failed under each condition. It shows at a glance the range of conditions under which an LSI works correctly (its operating margin).

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More Testing and inspection questions

  1. Which correctly describes the typical test flow of semiconductor products?
  2. Which items are mainly checked in an AC test?
  3. What is the technology called that expands test patterns inside the chip and compresses the responses to reduce scan test data volume and test time?
  4. What is the test called that runs at the actual operating frequency to detect defects where signals propagate too slowly?
  5. What is it called to classify products by performance, such as operating speed and power consumption, based on test results?