Patent ID: 7671387

Claim:
A lateral junction field effect transistor comprising: a first semiconductor layer located on a semiconductor substrate, and doped with impurities (p) of a first conductivity type; a second semiconductor layer located on said first semiconductor layer, and doped with impurities (n) of a second conductivity type more heavily than said first semiconductor layer; a third semiconductor layer located on said second semiconductor layer, and doped with impurities (p) of the first conductivity type; a fourth semiconductor layer located on said third semiconductor layer, and doped with impurities (n) of the second conductivity type; a fifth semiconductor layer located on said fourth semiconductor layer, and doped with impurities (p) of the first conductivity type; source/drain region layers formed in said fifth semiconductor layer, spaced from each other by a predetermined distance, having a lower surface extending on said second semiconductor layer, and doped with impurities of the second conductivity type more heavily than said second and fourth semiconductor layers; a first gate electrode layer arranged in said fifth semiconductor layer between said source/drain region layers, having a lower surface extending on said second semiconductor layer, and doped with impurities (p) of the first conductivity type more heavily than said second semiconductor layer; and a second gate electrode layer of the first conductivity type (p) arranged in said fifth semiconductor layer between said source/drain region layers, neighboring to said first gate electrode layer, having substantially the same impurity concentration as said first gate electrode layer, and having the same potential as said first gate electrode layer.