Patent ID: 7943988

Claim:
A semiconductor device, comprising: a semiconductor layer of a first conductivity type and a first doping concentration; a first semiconductor region above a first portion of the semiconductor layer, wherein the first semiconductor region is of the first conductivity type and has a doping concentration less than the first doping concentration; a gate dielectric on a top surface of the first semiconductor region; a gate electrode on the gate dielectric, wherein the gate electrode comprises a center portion that comprises metal on the gate dielectric, a first silicon portion on the gate dielectric laterally adjacent to a first side of the center portion, and a second silicon portion on the gate dielectric laterally adjacent to a second side of the center portion in which the first side is opposite the second side; a second semiconductor region comprising a first portion under the first silicon portion and the gate dielectric, wherein the second semiconductor region is of a second conductivity type different from the first conductivity type; and a third semiconductor region laterally adjacent to the first portion of the second semiconductor region, wherein the third semiconductor region is of the first conductivity type.