Patent ID: 6376101
Filing Date: 2002-04-23
Classification: C08L,H01L,Y10T

Abstract:
An epoxy resin for encapsulating semiconductor elements, consisting essentially of:(A) an epoxy resin in which the proportion of carbon atoms of aromatic derivation to all of the carbon atoms epoxy resin is 70% or more; (B) a phenol resin in which the proportion of the carbon atoms of aromatic derivation to all of the carbon atoms in the phenol resin is 70% or more, and whose phenolic hydroxy equivalent is 140 to 300; (C) a curing accelerator, and (D) an inorganic filler whose content W (wt %) in the whole epoxy resin composition satisfied 88&lE;W&lE;94, wherein combustion starting temperature in thermogravimetric analysis of the cured epoxy resin composition in an air atmosphere 280Â° C. or higher.