Continuous electrical resistance monitoring, pull strength, and fatigue life of isotropically conductive adhesive joints

Four isotropically conducting adhesives were used to form lap joints betwee n copper fingers which had been prepared with four surface metallizations ( Cu, Au, Pd, and PdNi). A micromechanical tester was used to perform pull an d fatigue tests on the 16 adhesive/finish combinations. The micro-ohm resis tance change was measured during both the pull and fatigue tests. The simil arities and differences between the mechanical strength, fatigue life, and resistance change for the 16 adhesive/finish combinations have been reporte d, and conclusions were made about relative motion between silver particles , and the fracture interfaces.