TRI Austin developed procedures that can be used as a “standard of evaluation” for lead free solders, making it possible to compare them with each other and with lead/tin solders. Leading lead free solder alloys and conductive adhesives suitable for military applications were cataloged. Standardized models to predict thermal-mechanical failure were developed, given a formulation and a specified geometry. A standardized stress test was designed to validate the above model and enhance failure prediction.
TRI’s expertise in accelerated life testing provided the basis for evaluating lead free solders using thermal models and in the simulation of actual exposures to various “real world” environmental conditions. The technology can enhance the reliability of future missile and other weapons systems, and is applicable to National Missile Defense initiatives. It also provides the commercial electronics industry with tools to increase the reliability of consumer electronic components that use lead free solder interconnects.