Patent ID: 6410145
Filing Date: 2002-06-25
Classification: C08L,H05K,Y10T

Abstract:
An insulation layer having a thickness of 10 to 300 &mgr;m used for build-up method, wherein the layer is formed by curing a thermosetting resin composition comprising (A) an epoxy resin represented by formula (I), (B) a curing agent for epoxy resin, and (C) a poly(ether sulfone), in the formula, Gly represents glycidyl group; R represents each independently, an alkyl group having 1 to 10 carbons, a cycloalkyl group having 5 to 7 carbons, or a hydrocarbon group having 6 to 20 carbon atoms which contains a cycloalkyl group having 5 to 7 carbons; i represents each independently a numeral of 0 to 4; when i is 2 or more, R may be the same or different from each other; and n represents a repeating number of 1 to 10.