Power Electronics, Motors & Drives worked example

Power Module First-Pass Yield at 99% target module yield: a worked example

This scenario runs the power module first-pass yield calculation on the strong side: 99% target module yield, with every other input held at its documented default. Use it when reviewing die attach, wire bond, solder void, substrate attach, partial discharge, thermal cycling, or EOL test performance.

The inputs for this scenario

  • Power modules passed first time: 8 modules (unchanged)
  • Total power modules tested: 250 modules (unchanged)
  • Target module yield: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Power module first-pass yield = power modules passed first time ÷ total power modules tested × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for power module first-pass yield, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for module yield gap to target.
  • At this operating point the engine returns 8 count for power modules passed first time.
  • At this operating point the engine returns 250 count for total power modules tested.

How this compares with the baseline

  • Against the tool's baseline example, where target module yield sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it at end-of-line or after a critical test gate to trend quality and to quantify the distance to a yield target for a power-module line. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Power module first-pass yield: 3.2 % (headline result)
  • Module yield gap to target: 95.8 points
  • Power modules passed first time: 8 count
  • Total power modules tested: 250 count

Run it with your numbers

  • Every input above is editable in the live Power Module First-Pass Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.