Semiconductor Advanced Packaging & Test worked example

Underfill Usage with underfill dispense rate of 6 units / hr: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop underfill dispense rate to 6 units / hr, then walk the calculation through step by step. Estimate underfill usage for semiconductor advanced packaging and test using production-ready inputs so teams can budget material or utility usage and compare it with actual consumption.

The inputs for this scenario

  • Underfill dispense rate: 6 units / hr (the input this scenario stresses; the baseline uses 12)
  • Dispenser runtime this run: 8 hr (held at the documented default)
  • Underfill material cost per unit: 3.5 $ / unit (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Underfill usage consumed = underfill usage use rate × underfill usage runtime.
  • Underfill usage consumed works out to 48 units at these inputs, and this is the headline figure for the scenario.
  • Underfill usage run cost works out to 168 $ at these inputs.
  • Underfill usage runtime works out to 8 hr at these inputs.
  • Underfill usage unit cost works out to 3.5 $ / unit at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where underfill dispense rate sits at 12 units / hr and the headline result is 96 units, this scenario comes in 50% below the baseline at 48 units.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to underfill dispense rate, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes a constant dispense rate and ignores purge, priming waste, and pot-life scrap, so actual material draw usually runs a few percent higher.

Results at a glance

  • Underfill usage consumed: 48 units (headline result)
  • Underfill usage run cost: 168 $
  • Underfill usage runtime: 8 hr
  • Underfill usage unit cost: 3.5 $ / unit

Run it with your numbers

  • To rerun this with your own numbers, open the live Underfill Usage calculator, set underfill dispense rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.