Electrical resistance modeling of isotropically conductive adhesive joints

Abstract

An isotropically conductive adhesive (ICA) is a composite material consisting of a nonconductive polymer binder and conductive filler particles. When the filler content is high enough the nonconductive binder is transformed into a good electrical conductor. A 2D model is presented to analyze the principle influences of the geometrical and electrical properties of the filler particles on the probability of interconnection and the electrical resistance of an ICA joint. With this model the arrangement of the particles within the joint is calculated by considering different types of mechanical forces. Taking into account the electrical properties of the particles, the electrical contact behavior is investigated