Patent ID: 6518091
Filing Date: 2003-02-11
Classification: B29C,G02F,H01L,H05K

Abstract:
A method of making an anisotropic conductive element for use in microelectronic packaging comprising the steps of:(a) providing a layer of a material having a pair of oppositely-directed major faces, said layer incorporating a curable dielectric material in a fluid condition and electrically conductive particles in said curable dielectric material; (b) applying a magnetic field to said layer of a material so as to alter the configuration of said particles and so as to form areas of high particle concentration defining a plurality of conductive paths extending between the major faces of said layer; (c) compressing said layer for moving said conductive particles together to provide lower resistance electrical paths through said layer; and (d) after the applying a magnetic field step, curing said dielectric material.