Patent ID: 7952145

Claim:
A semiconductor device comprising: a semiconductor substrate; a first distinct p-channel laterally diffused metal oxide semiconductor (LDMOS) transistor formed over said semiconductor substrate; at least one second distinct p-channel LDMOS transistor formed over said semiconductor substrate each of the first and second distinct p-channel LDMOS transistors being configured to operate independent of the other; first lightly doped drain region and a first gate electrode formed over said substrate and electrically coupled to said first LDMOS transistor; second lightly doped drain region and a second gate electrode formed over said substrate and electrically coupled to said second LDMOS transistor; a source region and a channel region of said first and second LDMOS transistors being electrically connected to said substrate via a conductive plug, wherein the transistors are configured so that current in channels of the LDMOS transistors flow vertically into the substrate, wherein the channel regions and lightly doped drain regions are doped to a depth to abut the top surface of the substrate; and a common source electrode electrically coupled to said substrate.