A study of Anisotropic Conductive Adhesives with Novel Spacer Particles

Abstract

A method for quantitative evaluation of particle distribution, which includes clusterization and dispersion, is developed. Clusterization parameter C and dispersion parameter D were measured by statistical calculation of clusters/particles size in the matrix and sub-region particle area fraction respectively. Sensitivity of the method to different distribution patterns was high and in consistency with failure rate analytical model. This methods provides a good evaluation and classification of how well particles distribute in ACA. Results from applying the methods to real ACA bonding also show an agreement between ACA distribution and electrical failure rate. (...)