Transient liquid phase sintering composites: Polymer adhesives with metallurgical bonds
Conductive composites composed of a metallurgically alloyed web with an interpenetrating polymer network have been developed. The metal and polymer networks are simultaneously formed in situ. Bulk as well as interface electrical connections are metallurgically alloyed providing stable conduction. Conventional solder paste dispensing and processing equipment can be utilized. Preliminary analysis of electrical, mechanical and reliability characteristics have been performed. The bulk and interfacial electrical resistance is comparable to solder compounds. Test vehicles pass drop testing with a variety of lead configurations and surface finishes. Electrical characteristics remain consistent both during and following humidity exposure and thermal cycling.