Patent ID: 8431972

Claim:
A semiconductor device comprising: a semiconductor body; a gate formed over a channel in the semiconductor body, the channel being doped with a first concentration of dopants of a first conductivity type; a first source/drain region formed on a surface of the semiconductor body adjacent to a first edge of the gate, wherein the first source/drain region is doped with a dopant of a second conductivity type opposite the first conductivity type, and a first portion of the first source/drain region is counter-doped with a counter-dopant of the first conductivity type, wherein the first portion of the first source/drain region does not extend to a region adjacent to the first edge of the gate, a concentration of the second conductivity type dopant exceeds a concentration of the first conductivity type counter-dopant in the first portion of the first source/drain region, and the concentration of the first conductivity type counter-dopant in the first portion of the first source/drain region exceeds the first concentration; and a second source/drain region formed at an upper surface of the semiconductor body adjacent to a second edge of the gate, wherein the second source/drain region is doped with the dopant of the second conductivity type.