Patent ID: 6867458

Claim:
A semiconductor device, comprising: a source region formed of a semiconductor; a drain region formed of a semiconductor of the same conductive type as that of said source region; a channel region formed of a semiconductor between said source region and said drain region; a gate insulating film provided on said channel region; and a gate electrode provided on said gate insulating film and formed with a P-N junction including a P-type semiconductor region and an N-type semiconductor region, said P-N junction extending parallel to a source-drain direction of said source region and said drain region, wherein said P-type semiconductor region and said N-type semiconductor region of said P-N junction of said gate electrode are electrically insulated on all sides of said P-N junction, wherein said gate electrode includes a first gate portion provided above said channel region and a second gate portion provided in the semiconductor device overlying outside of a region which consists of said channel region, said source region and said drain region, and said second gate portion includes said P-N junction.