Patent ID: 7372106

Claim:
A semiconductor device comprising: a semiconductor layer formed on a dielectric layer; a gate electrode disposed on the semiconductor layer; a source layer disposed on one side of the gate electrode and formed in the semiconductor layer, the source layer having a gate-electrode-side surface nearest the gate electrode and an opposite surface facing away from the gate electrode; a drain layer disposed on another side of the gate electrode and formed in the semiconductor layer; a body region formed in the semiconductor layer at a position below the gate electrode, the body region being isolated between the source layer and the drain layer; a body-source connection layer that contacts the source layer and the body region; an electric field relieving region provided between the source layer and the body-source connection layer, the electric field relieving region extending from the gate-electrode-side surface of the source layer to the opposite surface of the source layer so as to separate the source layer and the body-source connection layer; and a contact region that directly contacts the electric field relieving region and that connects the source layer and the body-source connection layer.