Patent ID: 7714381

Claim:
An integrated power device comprising: a semiconductor substrate of a first conductivity type having a first surface; an epitaxial layer on the first surface of the semiconductor substrate, the epitaxial layer having a first surface that is opposite to the first surface of the semiconductor substrate; a vertical power transistor formed on the first surface of the epitaxial layer, the vertical power transistor having a channel region and also having a plurality of trench type gates formed within respective plurality off openings formed to extend from the first surface of the epitaxial layer into the epitaxial layer; a first doped region having the first conductivity type and within the epitaxial layer, the first doped region extending continuously between and underlying each trench type gate of the plurality of trench type gates wherein the first doped region does not extend to the first surface of the epitaxial layer; and a second doped region within the epitaxial layer forming a body region of the vertical power transistor, a portion of the second doped region extending between each trench type gate of the plurality of trench type gates wherein all of the portion of the second doped region overlies the first doped region and does not extend to touch the semiconductor substrate.