Patent ID: 8642682

Claim:
A semiconductor device encapsulant which is used in resin encapsulation for semiconductor devices and their peripheral electrode wirings, comprising 100 parts by weight of an epoxy resin component (A) containing an epoxy compound having at least 2 epoxy groups in its molecule and a curing agent, wherein the epoxy compound is a mixture composed of an epoxy compound containing no halogen atom and a brominated epoxy compound, 70 parts by weight to not higher than 400 parts by weight of a carbon precursor (B) having a carbon content of 80 to 97% by mass and a volume resistivity of 10 2 to 10 10 Ω·cm, 0 parts by weight of a conductive filler (C) having a volume resistivity lower than 10 2 Ω·cm and 100 to 1,500 parts by weight of another filler (D) which is inorganic, wherein the total proportion of the fillers composed of the carbon precursor (B) and said another filler (D) is 70 to 90% by weight based on the total weight of the semiconductor device encapsulant, wherein the surface resistivity of a molded product encapsulated by the semiconductor device encapsulant is 10 6 to 10 12 Ω per a surface area unit, and wherein the static decay time required until the potential of the molded product encapsulated by the semiconductor device encapsulant is reduced from 1,000 V to 50 V is at most 10 seconds.