Still need more information?

Apps Notes, articles, newsletters, software downloads, podcasts, Mobile Apps and more - get it all here!

Be sure to check out our blog for the latest tech info, tips, tricks, and musings from our applications and engineering staff!

Educational Resources


Fine Leak

Fine leak is a term used in microelectronic package hermetic leak testing. 

A hermetically sealed package is pressurized with helium or sealed with a helium trace gas inside the package.  The sealed package is subjected to a vacuum chamber connected to a mass spectrometer and the rate of helium leak is measured in atm-cc/sec. 

Military standard allowable leak rate for a hermetically sealed package is less than or equal to 5 x 10-8 atm-cc/sec.