Patent ID: 7936042

Claim:
A field effect transistor comprising: a body having a doping of a first conductivity type located atop a buried insulator, said body including a silicon body portion having at least a region that is laterally positioned between a wide band gap semiconductor material containing body portion and a silicon germanium alloy containing body portion; a gate dielectric located on an upper surface of said silicon body portion; a drain region including a wide band gap semiconductor material containing drain portion located at least within an upper region of said wide band gap semiconductor material containing body portion, wherein said wide band gap semiconductor material containing body portion and said wide band gap semiconductor material containing drain portion comprises a semiconductor material having a wider band gap than silicon and wherein said silicon body portion has an upper surface in direct contact with a lower surface of said gate dielectric and wherein no portions of the wide band gap semiconductor material containing body portion and said silicon germanium alloy containing body portion are in direct contact with said lower surface of said gate dielectric, and wherein a lower boundary of said wide band gap semiconductor material containing drain portion does not extend below a lower boundary of said wide band gap semiconductor material containing body portion; and a source region including a silicon-germanium alloy containing source portion and located laterally adjacent said body, wherein said silicon-germanium alloy containing source portion and said wide band gap semiconductor material containing body portion are not in contact with said buried insulator.