Patent ID: 7273900

Claim:
A resin composition comprising: a crosslinking component with a weight average molecular weight of 1,000 or less having a plurality of styrene groups and represented by the following general formula: wherein R is a hydrocarbon skeleton; each of R 1 s, which may be the same or different, is a hydrogen atom or a hydrocarbon group of 1 to 20 carbon atoms; each of R 2 , R 3 and R 4 , which may be the same or different, is a hydrogen atom or an alkyl group of 1 to 6 carbon atoms; m is an integer of 1 to 4; and n is an integer of 2 or more, at least one high-molecular weight compound with a weight average molecular weight of 5,000 or more, an inorganic filler having a dielectric loss tangent of 0.002 or less, and at least one treating agent having a functional group reactive to a styrene group, wherein said at least one treating agent is selected from the group consisting of dimethylvinylmethoxysilane, methylvinyldimethoxysilane, γ-methacryloxypropyltrimethoxysilane, vinyltrichlorosilane, vinyltrimethoxysilane, vinyltriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane and 3-acryloxypropyltrimethoxysilane.