Semiconductor Advanced Packaging & Test worked example

Substrate Cost at 70% substrate yield to usable good: a worked example

This worked example runs the substrate cost numbers for a tougher week than the baseline: 70% substrate yield to usable good instead of the typical 97%. Estimates the substrate material cost contribution to an advanced semiconductor package.

The inputs for this scenario

  • Packages built in the run: 50,000 units (held at the documented default)
  • Substrate purchase price per unit: 1.85 $/unit (held at the documented default)
  • Substrate yield to usable good: 70 % (the input this scenario stresses; the baseline uses 97)
  • Tooling and NRE amortization: 12,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total = packages x substrate price x yield% + tooling and NRE.
  • Total substrate cost works out to 76,750 $ at these inputs, and this is the headline figure for the scenario.
  • Substrate cost per unit works out to 1.54 $ / piece at these inputs.
  • Variable substrate cost works out to 64,750 $ at these inputs.
  • Fixed substrate cost adder works out to 12,000 $ at these inputs.

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 24.55% below the baseline at 76,750 $.
  • Use it when quoting a package, comparing substrate suppliers, or deciding whether a design's layer count is affordable at the target volume. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total substrate cost: 76,750 $ (headline result)
  • Substrate cost per unit: 1.54 $ / piece
  • Variable substrate cost: 64,750 $
  • Fixed substrate cost adder: 12,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Substrate Cost calculator, set substrate yield to usable good to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.