How do you calculate underfill usage?

Multiply the dispense rate by runtime for quantity, then multiply by unit cost for spend. At 12 units/hr for 8 hours you consume 96 units, costing $336 at $3.50 per unit.

What does the run cost include?

Only the underfill material itself. The $336 example excludes labor, machine time, and purge or priming waste, which you should budget separately.

How much underfill does a flip-chip run use?

It scales with runtime and dispense rate. The default gives 96 units of material over an 8-hour run at 12 units per hour.

Why track underfill consumption at all?

Underfill has short pot life and high cost, so over-ordering leads to scrap and under-ordering stops the line. Consumption planning keeps just-enough material on hand.

Does capillary vs. molded underfill change the numbers?

Yes; molded and capillary flows have different dispense rates and unit costs. Enter the rate and cost specific to your material and process.

How do I account for purge and priming waste?

This tool covers dispensed material only. Add a waste factor of a few percent on top of the 96-unit result to cover purge, priming, and pot-life scrap.

Semiconductor Advanced Packaging & Test calculator

Underfill Usage Calculator

Underfill Usage estimates how much capillary or molded underfill a flip-chip run consumes and what that material costs. Process and cost engineers at OSATs use it to budget epoxy volume, plan reorders, and price the underfill step into a package quote. Underfill is a high-value consumable with limited pot life, so tracking consumption against runtime avoids both stockouts and expensive scrapped syringes. The tool multiplies a dispense rate by runtime to get quantity, then applies unit cost for a run total.

What this calculator does

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.
Use it when underfill usage in semiconductor advanced packaging and test is being quoted and consumables are a real chunk of the cost stack.
It computes total underfill consumed as dispense rate times runtime, and the run material cost as consumption times unit cost.

Formula used

Underfill usage consumed = underfill usage use rate × underfill usage runtime
Underfill usage run cost = consumption × underfill usage unit cost

Inputs explained

Underfill dispense rate:
Dispenser runtime this run:
Underfill material cost per unit:

How to use the result

Use it to size material orders, budget a production run, or add underfill cost into a package price.
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.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The producer price index for paperboard and containers stands at 276.831 (BLS, May 2026), up 8.8% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate underfill usage? Multiply the dispense rate by runtime for quantity, then multiply by unit cost for spend. At 12 units/hr for 8 hours you consume 96 units, costing $336 at $3.50 per unit.
What does the run cost include? Only the underfill material itself. The $336 example excludes labor, machine time, and purge or priming waste, which you should budget separately.
How much underfill does a flip-chip run use? It scales with runtime and dispense rate. The default gives 96 units of material over an 8-hour run at 12 units per hour.
Why track underfill consumption at all? Underfill has short pot life and high cost, so over-ordering leads to scrap and under-ordering stops the line. Consumption planning keeps just-enough material on hand.
Does capillary vs. molded underfill change the numbers? Yes; molded and capillary flows have different dispense rates and unit costs. Enter the rate and cost specific to your material and process.

Last reviewed 2026-05-12.