Patent ID: 8436428

Claim:
An integrated power MOSFET device, comprising: a substrate; an epitaxial layer of a first conductivity type, the epitaxial layer and the substrate defining a first surface and a second surface, respectively; a sinker region of a second conductivity type, extending through the epitaxial layer from the first surface and in electrical contact with the substrate; a body region of the second conductivity type, extending within the sinker region from the first surface; a source region of the first conductivity type, extending within the body region from the first surface, the source region delimiting a channel region within the body region and facing the first surface; a gate region, extending over, and electrically insulated from, the first surface, above the channel region; a source contact, extending over the first surface and electrically connected to the body region and to the source region; a drain contact, extending over the first surface and electrically connected to the epitaxial layer; and a source metallization region, extending over the second surface and electrically connected to the substrate.