Semiconductor Advanced Packaging & Test worked example

Burn-in Capacity at 65% expected burn-in oven uptime: a worked example

Suppose expected burn-in oven uptime falls to 65%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate burn-in capacity for semiconductor advanced packaging and test using production-ready inputs so teams can confirm whether capacity can cover demand before committing the schedule.

The inputs for this scenario

  • Burn-in devices loaded per oven cycle: 4 units / cycle (held at the documented default)
  • Available burn-in oven cycles: 480 cycles (held at the documented default)
  • Expected burn-in oven uptime: 65 % (the input this scenario stresses; the baseline uses 90)
  • Expected burn-in first-pass yield: 97 % (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Gross burn-in capacity = burn-in capacity output per cycle × available burn-in capacity cycles.
  • Good burn-in capacity works out to 1,211 units at these inputs, and this is the headline figure for the scenario.
  • Gross burn-in capacity works out to 1,920 units at these inputs.
  • Burn-in capacity downtime loss works out to 672 units at these inputs.
  • Burn-in capacity yield loss works out to 37.44 units at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where expected burn-in oven uptime sits at 90% and the headline result is 1,676 units, this scenario comes in 27.78% below the baseline at 1,211 units.
  • It multiplies devices loaded per oven cycle by available cycles for gross capacity, then derates by oven uptime and post-burn-in first-pass yield to get good screened devices. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Good burn-in capacity: 1,211 units (headline result)
  • Gross burn-in capacity: 1,920 units
  • Burn-in capacity downtime loss: 672 units
  • Burn-in capacity yield loss: 37.44 units

Run it with your numbers

  • To rerun this with your own numbers, open the live Burn-in Capacity calculator, set expected burn-in oven uptime to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.