Patent ID: 8546877

Claim:
A semiconductor device comprising: a semiconductor substrate of a first general conductivity type; a semiconductor layer of a second general conductivity type formed on the semiconductor substrate; a body layer of the first general conductivity type formed in a surface portion of the semiconductor layer, the body layer comprising a channel region; a source layer of the second general conductivity type formed in a surface portion of the body layer; a gate electrode disposed on a portion of the body layer; a gate insulation film disposed between the channel region and the gate electrode; a drain layer of the second general conductivity type formed in the surface portion of the semiconductor layer; an insulating isolation layer of the first general conductivity type that isolates a region of the semiconductor layer in which the body layer is formed from other region of the semiconductor layer; a drain electrode electrically connected to the drain layer; and a diffusion layer of the second general conductivity type electrically connected to the drain electrode and physically separated from the drain layer, wherein the drain layer is disposed between the source layer and the diffusion layer.