Patent ID: 6410615
Filing Date: 2002-06-25
Classification: C08L,H01L,Y10S

Abstract:
An epoxy resin composition for semiconductor encapsulation which comprises an epoxy resin, a phenolic resin, a hardening accelerator and an inorganic filler, said epoxy resin composition having the following properties (X) to (Z):(X) the viscosity thereof as measured with a flow tester at 175Â° C. is from 50 to 500 poise; (Y) the minimum melt viscosity thereof as determined from the temperature dependence of viscosity thereof as measured with a dynamic viscoelastic meter at a shear rate of 5 (1/s) is 1Ã—105poise or lower, and (Z) the ratio of the viscosity thereof as measured at 90Â° C. (Z1) to that as measured at 110Â° C. (Z2) both with a dynamic viscoelastic meter at a shear rate of 5 (1/s), (Z1/Z2), is 2.0 or higher, wherein the content of the inorganic filler is from 80 to 92% by weight based on the whole epoxy resin composition.