Patent ID: 6429238
Filing Date: 2002-08-06
Classification: C08G,C08L,H01L

Abstract:
A sealing material for flip-chip type semiconductor devices in the form of a liquid epoxy resin composition comprising(A) a liquid epoxy resin, (B) an inorganic filler, (C) a curing accelerator having a solubility of up to 1% by weight in the epoxy resin, a melting point of at least 170Â° C., a mean particle diameter of up to 5 &mgr;m, and a maximum particle diameter of up to 20 &mgr;m, and represented by the following general formula (1): wherein R1 and R2 each are hydrogen, methyl, ethyl, hydroxymethyl or phenyl, R3 is methyl, ethyl, phenyl or allyl, and R4 is hydrogen or a group of the following formula (2): and(D) an amino group-containing, polyether-modified polysiloxane of the following general formula (3): wherein R5 is a monovalent hydrocarbon group of 1 to 6 carbon atoms, R6 is a monovalent hydrocarbon group of 1 to 6 carbon atoms or monovalent organic nitrogenous group having at least one NH group, R7 is a divalent hydrocarbon group of 1 to 10 carbon atoms or divalent organic nitrogenous group having at least one NH group, the compound of formula (3) containing at least one NH group in a molecule, (a) is an integer of 10 to 200, (b) is an integer of 1 to 10, (c) is an integer of 0 to 10, and (d) is equal to 0 or 1, and Y is a group of the following general formula (4): wherein R8 is a monovalent hydrocarbon group of 1 to 6 carbon atoms, (e) is an integer of 0 to 25, (f) is an integer of 5 to 50, and (e) and (f) satisfy e/f&lE;1 and e+f=10 to 50.