Patent ID: 7470471
Filing Date: 2008-12-30
Classification: C08K,H05K,Y10T

Abstract:
1. A prepreg obtained by impregnating a substrate with a resin composition, wherein the resin composition comprises a resin component containing a maleimide group-containing compound, an epoxy resin, a phenolic resin containing at least one naphthalene ring, and a calcinated talc, wherein the calcinated talc is contained in an amount of not less than 30 weight parts and not more than 250 weight parts to 100 weight parts of the total amount of the resin component, and wherein the maleimide group-containing compound contains 2 or more maleimide groups, and is at least one selected from the group consisting of following compounds (1), (3) and (4); wherein in formula (1), R R wherein in formulae (2-1), (2-2) and (2-3), X is the same or different with one another, and represents —CH Y is the same or different with one another and represents —CH wherein in formula (3), n is 0 to 10 in average; and wherein in formula (4), n is 0 to 10 in average.