Patent ID: 7250650

Claim:
A field-effect transistor structure comprising: a first and second source/drain region of a first conduction type, which are formed in a semiconductor substrate of a second conduction type, to define a channel region; a gate insulation layer formed at a surface of the channel region; a control layer formed at a surface of the gate insulation layer; a diode doping region of the first conduction type that realizes a diode in the semiconductor substrate; an electrically conductive diode connection layer that connects the diode doping region to the control layer; and a depression formed in the semiconductor substrate, the diode doping region formed at a bottom of the depression and the diode connection layer formed in the depression to dissipate excess charge carriers in the semiconductor substrate; a dielectric layer formed at walls of the depression between the diode connection layer and the semiconductor substrate to realize a capacitor connected to the control layer.