Patent ID: 8552572
Filing Date: 2013-10-08
Classification: C08G,H01L

Abstract:
1. A resin composition for encapsulating a semiconductor comprising: a phenol resin (A), an epoxy resin (B), and an inorganic filler (C); wherein the phenol resin (A) comprises at least one polymer component (A0) composed of a polymer having structural units represented by the following general formulae (1) and (2): wherein, in the general formula (1), R1 and R2 are each independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms; each R3 is independently a hydrocarbon group having 1 to 6 carbon atoms; and a is an integer of 0 to 3, wherein, in the general formula (2), R5, R6, R8 and R9 are each independently a hydrogen atom or a hydrocarbon group having 1 to 6 carbon atoms; each R4 and R7 is independently a hydrocarbon group having 1 to 6 carbon atoms; b is an integer of 0 to 3; and c is an integer of 0 to 4; and wherein at least one of said at least one polymer component (A0) is composed of a polymer having structural units represented by general formulae (1) and (2) and terminated on at least one end with an aromatic group free of polar groups and containing at least one alkyl group having 1 to 3 carbon atoms.