Patent ID: 8330220

Claim:
A laterally double diffused metal oxide semiconductor device comprising: a first well region having a first conductivity type; a first doped region having a second conductivity type, wherein the first doped region is adjacent to, aligned with, and below the first well region, and the second conductivity type is different in type than the first conductivity type; a first doped buried semiconductor region having the first conductivity type, wherein: the first doped buried semiconductor region is under the first well region but is not in physical contact with the first well region, the first doped buried semiconductor region is under the first doped region and in contact with the first doped region, the first doped region extends below a top surface of the first doped buried semiconductor region and is adjacent to at least a portion of at least one side of the first doped buried semiconductor region, and the first doped buried semiconductor region is capable of redistributing carriers in the first well region; an epitaxial layer having the second conductivity type, wherein the epitaxial layer is adjacent to at least a portion of the first doped region, the epitaxial layer is adjacent to a bottom surface of the first doped buried semiconductor region and a portion of the at least one side of the first doped buried semiconductor region that is not adjacent to the first doped region, and the first doped region is doped at a concentration greater than that of the epitaxial layer; a buried layer under the first doped buried semiconductor region, wherein: the buried layer has the first conductivity type, the buried layer is doped at a concentration greater than that of the first well region and greater than that of the first doped buried semiconductor region, and the buried layer is electrically tied to the first well region.