Patent ID: 7126166

Claim:
A lateral IGFET device comprising: semiconductor substrate having a first conductivity type; a region of semiconductor material comprising alternating layers of first and second conductivity type material deposited over the semiconductor substrate and having a first major surface, the region of semiconductor material further including a top layer of the first conductivity type formed adjacent the first major surface and one of the alternating layers of the second conductivity type formed adjacent and below the top layer; a drain region of the second conductivity type extending from the first major surface into at least a portion of the region of semiconductor material and adjoining at least a portion of the alternating layers; a body region of the first conductivity type formed in a portion of the region of semiconductor material and extending from the first major surface partially into the top layer; a first source region formed in the body region; a trench gate structure formed in a portion of the region of semiconductor material and adjoining the alternating layers, the body region and the first source region, wherein the trench gate structure controls a sub-surface channel region; and a surface gate structure including a gate dielectric layer formed overlying t-he first major surface and a gate electrode layer over-lying the gate dielectric layer, wherein the surface gate structure extends over the first source region and controls conduction in a surface channel region.