Patent ID: 6080443
Filing Date: 2000-06-27
Classification: H01B,H01L,H05K

Abstract:
A process for producing a microcapsule-type electro-conductive filler, comprising the steps of:a first step of treating electro-conductive metallic particles with a coupling agent, the amount of coupling agent being in the range of 0.1 and 10% by weight, based on the amount of metallic particles;a second step of mixing the coupling agent treated metallic particles with a solvent in which bisphenol A epoxy resin is dissolved, to coat the bisphenol A epoxy resin onto the surface of the electro-conductive metallic particles;a third step of dispersing the mixture obtained from said second step in an aqueous phase having a viscosity in the range of between 20 and 10,000 cps and having tetraethylene pentamine dissolved therein, to form an aqueous suspension; anda fourth step of stirring said aqueous suspension at a rate in the range of 50 and 250 rpm to polymerize the bisphenol A epoxy resin and the tetraethylene pentanine to form an insulating resin on the surface of the metallic particles.