Patent ID: 7397139

Claim:
An encapsulating solid epoxy resin molding material, comprising (A) an epoxy resin, (B) a curing agent, and (C) a silica, wherein (C) the silica has a maximum diameter size of at least 32 μm, an average particle size of 12 μm or less and a specific surface area of 3.0 m 2 /g or more, and wherein (C) the silica satisfies the following conditions: the amount of particles having a particle size of 12 μm or less is 50% or more by weight; the amount of particles having a particle size of 24 μm or less is 70% or more by weight; and the amount of particles having a particle size of 32 μm or less is 80% or more by weight; the amount of particles having a particle size of 48 μm or less is 90% or more by weight.