Patent ID: 6995452

Claim:
A metal-oxide-semiconductor field effect transistor (MOSFET) device comprising: a channel region formed on a monocrystalline silicon layer of a siliconon-on-insulator (SOI) substrate; a source/drain region formed in the monocrystalline silicon layer and comprising a deep junction region and a shallow extension region; a first silicon oxide film pattern formed on the monocrystalline silicon layer to contact the deep junction region and doped with a first impurity of a first conductivity type at a first concentration; a second silicon oxide film spacer formed on the monocrystalline silicon layer to contact the shallow extension region and doped with a second impurity of the first conductivity type at a second concentration; a gate electrode formed on the channel region and having a T-shaped section; and a gate dielectric film interposed between the channel region and the gate electrode.