Patent ID: 7964933

Claim:
A semiconductor integrated circuit comprising: a) semiconductor substrate having material of a first conductivity type, b) a first region in said substrate in which an integrated circuit is fabricated, c) a second region in said substrate having material of a second conductivity type in which a power diode is fabricated, wherein the second regions comprises a first subregion having a first concentration of material of the second conductivity type, and a second subregion having a second concentration of material of the second conductivity type, wherein the power diode includes a conductive layer on a surface of the substrate functioning as a first electrode, and a conductive via extending from the surface into the substrate and contacting semiconductor material of the second conductivity type which functions as a second electrode, and d) dielectric material between the first region and the second region providing electrical isolation between the first region and the second region, wherein the power diode comprises a plurality of MOS source/drain elements and associated gate elements all connected together by the first electrode, a semiconductor layer of a second conductivity type in the second region and in which the plurality of MOS source/drain elements are fabricated, the semiconductor layer being contacted by the second electrode.