Patent ID: 6376100
Filing Date: 2002-04-23
Classification: C08K,H01L,Y10T

Abstract:
An underfill material for flip-chip type semiconductor devices, comprising(A) 100 parts by weight of a liquid epoxy resin, (B) 100 to 300 parts by weight of a spherical inorganic filler having a maximum particle size of up to 50 &mgr;m and a mean particle size of 0.5 to 10 &mgr;m, (C) 0.1 to 6 parts by weight of a reactive functional group-containing silicone compound of the following compositional formula (1): R1aR2bSi(OR3)c(OH)dO(4âˆ’aâˆ’bâˆ’câˆ’d)/2â€ƒâ€ƒ(1) wherein R1 is a monovalent organic group having a reactive functional group, R2 and R3 are independently unsubstituted or alkoxy-substituted monovalent hydrocarbon groups of 1 to 8 carbon atoms, a is a number of 0.16 to 1.0, b is a number of 0 to 2.0, c is a number of 0.5 to 2.0, d is a number of 0 to 1.0, and a+b+c+d is 0.8 to 3, the number of silicon atoms per molecule being from 2 to 6, and(D) 0.01 to 10 parts by weight of a curing accelerator.