Patent ID: 8169007

Claim:
A semiconductor structure comprising: a body layer comprising a semiconductor material and having a doping of a first conductivity type and located in a semiconductor substrate; a source region comprising said semiconductor material and having a doping of said first conductivity type and laterally abutting said body layer; a drain region comprising said semiconductor material and having a doping of said first conductivity type and laterally abutting said body layer; an upper gate region comprising said semiconductor material and having a doping of a second conductivity type and vertically abutting a top surface of said body layer, wherein said second conductivity type is the opposite of said first conductivity type; and a lower gate region comprising said semiconductor material and having a doping of said second conductivity type and vertically abutting a bottom surface of said body layer and laterally abutting sidewalls of said body layer and abutting said upper gate region, wherein said source region and said drain region have substantially coplanar top surfaces, and wherein a bottom surface of said source region is located below a level of a bottommost surface of said drain region.