Patent ID: 6255365
Filing Date: 2001-07-03
Classification: C08G,C08L,H01L

Abstract:
An epoxy resin composition comprising:(a) an epoxy resin mixture comprising:(1) about 50-95 parts by weight of a novolak type epoxy resin, and(2) about 5-50 parts by weight of a 4,4'-biphenol type epoxy resin represented by the general formula (I): ##STR6##wherein an average value of m is about 0-0.5; and(b) an epoxy resin hardener represented by the general formula (II): ##STR7##wherein R, which may be the same or different, represents an alkyl group having 1-10 carbon atoms, a substituted or unsubstituted phenyl group, a substituted or unsubstituted aralkyl group, an alkoxyl group, or a halogen atom; Z, which may be the same or different, represents a divalent hydrocarbon group having 1-15 carbon atoms, provided that at least one Z is a divalent hydrocarbon group having 5-15 carbon atoms; n is a number of 0-8 on the average value; and i, which may be the same or different, is an integer of 0-3, wherein the epoxy resin hardener is used in an amount such that the sum of groups reacting with epoxy groups in all epoxy resin hardener components is about 0.5-2.0 moles per one mole of epoxy group in all epoxy resin components;(c) about 80-95% by weight of an inorganic filler of the whole composition; and(d) a curing accelerator.