Patent ID: 7235845

Claim:
A laterally diffused metal-oxide-semiconductor transistor device comprising: a doped substrate having bottom and top surfaces and an epitaxial layer thereover having an upper surface; source and drain regions of a first conductivity type formed in the epitaxial layer proximate the upper surface of said epitaxial layer, said source and drain regions being spaced from one another and having a channel region of a second conductivity type formed therebetween in said epitaxial layer, said channel region having a portion extending under said source region, wherein said drain region comprises a lightly doped drain region formed adjacent to said channel region; a doped drain contact region spaced from said channel region by said lightly doped drain region; a source contact electrically coupling said source region and channel region to said substrate; and a conductive gate having an upper surface and sidewall surfaces, said conductive gate formed over a gate dielectric layer formed over said channel region, said conductive gate partially overlapping said source and drain regions, wherein the channel region and lightly doped drain regions are doped to a depth to abut the top surface of said substrate.