Patent ID: 7235876

Claim:
A semiconductor device comprising: first and second metallic plates, each of which includes a heat radiation surface and an inner surface, wherein the inner surfaces of the metallic plates face each other; a semiconductor element disposed between the metallic plates; a block disposed between the second metallic plate and the semiconductor element; a solder member disposed between the second metallic plate and the block in order to connect therebetween; and a resin mold for molding the metallic plates, the semiconductor element and the block, wherein the heat radiation surface of each metallic plate is exposed from the resin mold, the second metallic plate includes a groove for preventing the solder member from expanding outside the block, the groove is disposed on the inner surface of the second metallic plate, and disposed on an outer periphery of the block, the second metallic plate further includes an inner surface member on an inner surface of the grove, and the inner surface member has a solder wettability, which is larger than a solder wettability of the block.