Patent ID: 8575692

Claim:
A field LDMOS device, comprising: a semiconductor body having a first surface, and having therein a drift space of a first conductivity type with a first edge extending to the first surface and a WELL region of a second, opposite, conductivity type with a second edge extending to the first surface, the first and second edges being laterally separated by a first conductivity type part of the semiconductor body; a source and drain of the first conductivity type in the semiconductor body, the source being located in the WELL region and the drain being located in the drift space; an insulated gate located over the semiconductor body, the gate having a third edge toward the source and a fourth edge toward the drain; a doped further region of the second conductivity type extending across a part of the WELL region and under the third edge and having a fifth edge in the part of the semiconductor body; and a doped still further region of the first conductivity type in the further region, in Ohmic contact with the source, having a sixth edge laterally proximate the third edge and separated from the fifth edge by a part of the further region adapted to form therein a field induceable conductive channel of the first conductivity type, the field induceable channel having a channel length laterally bounded by the fifth and the sixth edges.