Semiconductor Advanced Packaging & Test worked example

Substrate Cost at 99% substrate yield to usable good: a worked example

What does the result look like when substrate yield to usable good reaches 99%? The full calculation is worked below with real intermediate numbers. Use it to model how substrate pricing and yield drive the bill of materials on a packaging quote.

The inputs for this scenario

  • Packages built in the run: 50,000 units (unchanged)
  • Substrate purchase price per unit: 1.85 $/unit (unchanged)
  • Substrate yield to usable good: 99 % (raised for this scenario; the documented default is 97)
  • Tooling and NRE amortization: 12,000 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Total = packages x substrate price x yield% + tooling and NRE) to the inputs above produces each figure below.
  • At this operating point the engine returns 103,575 $ for total substrate cost, the number this scenario is built around.
  • At this operating point the engine returns 2.07 $ / piece for substrate cost per unit.
  • At this operating point the engine returns 91,575 $ for variable substrate cost.
  • At this operating point the engine returns 12,000 $ for fixed substrate cost adder.

How this compares with the baseline

  • Against the tool's baseline example, where substrate yield to usable good sits at 97% and the headline result is 101,725 $, this scenario comes in 1.82% above the baseline at 103,575 $.
  • A figure at this level is achievable when substrate yield to usable good is genuinely sustained, not just peaked for a shift. It treats substrate price and usable yield as flat averages, so it won't capture price breaks at higher volume tiers or defect clustering that changes usable yield lot to lot.

Results at a glance

  • Total substrate cost: 103,575 $ (headline result)
  • Substrate cost per unit: 2.07 $ / piece
  • Variable substrate cost: 91,575 $
  • Fixed substrate cost adder: 12,000 $

Run it with your numbers

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

Last reviewed 2026-05-12.