What is the hermetic seal yield calculator for?

It calculates the percentage of hermetic packages that passed leak or seal integrity testing.

What information should I enter?

Use passing package count, total tested package count, and the target yield for the same device lot and leak test method.

What does the result tell me?

The result shows seal yield and the point gap to the target, which helps decide whether to release, hold, or investigate the lot.

When is the result only an estimate?

It is an estimate when counts are preliminary, sampling is incomplete, test methods differ, or failures still need engineering review.

Implantable Electronics & Neurodevices calculator

Hermetic Seal Yield Calculator

Use this calculator to turn hermetic seal inspection results into a clear yield percentage and target gap. It is written for implantable electronics lots where titanium cans, ceramic feedthroughs, laser welds, or glass seals must pass before downstream assembly or sterile packaging.

What this calculator does

Calculate the pass rate for implantable device hermetic packages after helium leak testing or seal inspection.
Use it when quality or process engineering needs to compare hermetic package seal results against the release target for a pacemaker, neurostimulator, sensor, or feedthrough lot.
The result shows the sealed package pass rate and whether the lot is above or below the target yield.

Formula used

Hermetic seal yield = hermetic packages passing leak test ÷ hermetic packages tested × 100
Hermetic seal yield gap to target = hermetic seal yield - target hermetic seal yield

Inputs explained

Hermetic packages passing leak test: Count only packages that passed the specified helium leak, gross leak, or seal integrity acceptance criteria.
Hermetic packages tested: Use the total number of cans, feedthrough assemblies, or sealed modules tested in the same lot.
Target hermetic seal yield: Use the process control target, validation acceptance criterion, or lot release target used by quality.

How to use the result

Use it during laser weld qualification, helium leak test review, supplier seal audits, or lot disposition meetings.
It does not replace validated leak rate limits, device history record review, nonconformance disposition, or investigation of specific seal failure modes.

Common questions

What is the hermetic seal yield calculator for? It calculates the percentage of hermetic packages that passed leak or seal integrity testing.
What information should I enter? Use passing package count, total tested package count, and the target yield for the same device lot and leak test method.
What does the result tell me? The result shows seal yield and the point gap to the target, which helps decide whether to release, hold, or investigate the lot.
When is the result only an estimate? It is an estimate when counts are preliminary, sampling is incomplete, test methods differ, or failures still need engineering review.

Last reviewed 2026-05-12.