Patent ID: 8409704

Claim:
A prepreg, obtained by impregnating a base material with an epoxy resin composition containing an epoxy resin(A), a curing agent (B), an accelerator (C), a phenoxy resin (D), and an inorganic filler (E) and semi-hardening the impregnated material, wherein the inorganic filler (E) has an average particle diameter of 3 μm or less, and wherein the phenoxy resin (D) contains a phenoxy resin (D2) having the skeleton(s) represented by the following General Formula (1) and/or General Formula (2): (in Formulae (1) and (2), R1 represents an alkylene group or —SO 2 —; R2 represents a linear or cyclic carbonyl group having a carbon number of 1 to 20 or aromatic carbonyl group at a rate of 5 to 99 mol % and a hydrogen atom at a rate of 1 to 95 mol %; and R3 represents a hydrogen atom or a methyl group).