Semiconductor Advanced Packaging & Test worked example

Chiplet Assembly Yield at 99% target chiplet assembly yield rate: a worked example

This scenario runs the chiplet assembly yield calculation on the strong side: 99% target chiplet assembly yield rate, with every other input held at its documented default. Use it when chiplet assembly yield in semiconductor advanced packaging and test needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Good chiplet assemblies passing final AOI: 8 count (unchanged)
  • Total chiplet assemblies attempted on the module: 250 count (unchanged)
  • Target chiplet assembly yield rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Chiplet assembly yield rate = chiplet assembly yield count ÷ total chiplet assembly yield population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for chiplet assembly yield rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for chiplet assembly yield gap to target.
  • At this operating point the engine returns 8 count for chiplet assembly yield count.
  • At this operating point the engine returns 250 count for total chiplet assembly yield population.

How this compares with the baseline

  • Against the tool's baseline example, where target chiplet assembly yield rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • Use it after each build lot or process change to gauge whether die-attach, hybrid bonding, or reflow is holding your composite-yield budget. 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

  • Chiplet assembly yield rate: 3.2 % (headline result)
  • Chiplet assembly yield gap to target: 95.8 points
  • Chiplet assembly yield count: 8 count
  • Total chiplet assembly yield population: 250 count

Run it with your numbers

  • Every input above is editable in the live Chiplet Assembly Yield calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.