Testing and inspection

What is the printed circuit board called that attaches to the tester's test head, carries the IC socket and peripheral components and routes signals to the IC for each product?

  1. ALoad board (DUT board)
  2. BMotherboard
  3. CPackage substrate
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Answer: A. Load board (DUT board)

A load board (DUT board) is a product-specific board connecting the tester to the device under test (DUT). It carries the socket, supply capacitors, relays, load circuits and so on, wiring tester signals correctly to the IC's terminals. One must be designed and built for each product.

  • A. Correct. It is a product-specific board connecting tester and IC.
  • B. A motherboard is the main board of a PC or similar.
  • C. A package substrate is part of the package that holds the chip.
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More Testing and inspection questions

  1. What is the main advantage of vertical probe cards, which stand the needles perpendicular to the pads?
  2. As wafer testing continues, aluminum debris from the pads and the like accumulates on the probe tips. What is done periodically in response?
  3. What is the purpose of enabling a prober's wafer stage (chuck) to be controlled to high or low temperature?
  4. In logic testing, which pair correctly names the test that exhaustively detects structural faults (such as stuck-at faults) using scan and similar, and the test that checks function as in actual operation?
  5. What is it called when good chips are judged defective and discarded because test limits are too strict or measurements are unstable?