Patent ID: 6214904
Filing Date: 2001-04-10
Classification: C08G,C08L,H01L,Y10T

Abstract:
An epoxy resin composition which seals semiconductors constructed of a semiconductor element, a base to support said semiconductor element, and an epoxy resin composition covering only one side opposite to the base, said epoxy resin composition comprising (A) epoxy resin selected from the group consisting of cresol novolak epoxy resin, phenol novolak epoxy resin, biphenyl epoxy resin, novolak epoxy resins synthesized from bisphenol-A or resorcinol, linear aliphatic epoxy resin, alicyclic epoxy resin, heterocyclic epoxy resin, halogenated epoxy resin and mixtures thereof, (B) a phenol hardener which is a compound represented by the structural formula (I) below:R.sup.3 (CH.sub.2 --R.sup.1 --CH.sub.2 --R.sup.2).sub.n CH.sub.2 --R.sup.1 --CH.sub.2 --R.sup.3 (I)(where R.sup.1 denotes a divalent aromatic group having no hydroxyl groups, R.sup.2 denotes a divalent aromatic group having one or more hydroxyl groups, R.sup.3 denotes a monovalent aromatic group having one or more hydroxyl groups, and n denotes a non-negative integer), (C) and inorganic filler of 85 to 95 % by weight based on the total amount of the epoxy resin composition, and giving a cured product which has (a) a flexural modulus of elasticity of 10 to 30 GPa at 23.degree. C. and (b) a coefficient of linear expansion of 4.times.10.sup.-6 /K to 10.times.10.sup.-6 /K in the temperature range from 23.degree. C. to the glass transition point, with the product of (a) and (b) being smaller than 2.times.10.sup.-4 GPa/K.