Current Issue

FTIR, SEM/EDS and ion chromatography used in concert with a pair of extraction methods offered varying degrees of precision.

A group of 25 conformal-coated, no-clean assemblies was placed in an environmental test chamber at 40°C/90%RH for 168 hr. under functional conditions. Each assembly was tested with its plastic/metal enclosure on the unit; large openings in the enclosures permitted the assemblies to be exposed to the environmental conditions. Twenty-two units produced dendrites in multiple locations; all grew shorts on the SMT pad without components (FIGURE 1). The units were biased with 3.3V for 168 hr. at 40oC/90%RH.

To continue reading, please log in or register using the link in the upper right corner of the page.

Submit to FacebookSubmit to Google PlusSubmit to TwitterSubmit to LinkedInPrint Article
Don't have an account yet? Register Now!

Sign in to your account