Patent ID: 6979861
Filing Date: 2005-12-27
Classification: H01L

Abstract:
1. A semiconductor power diode comprising: a) a semiconductor body of one conductivity type, b) at least one gate electrode overlying a gate insulator on a first surface of the body, c) a channel region having dopant of a second conductivity type in the first surface of the body underlying all of the gate electrode, d) a first doped region of the second conductivity type contiguous with the channel region, and positioned deeper in the body than the channel region and under a peripheral region of the gate electrode, e) a second doped region with dopant of the first conductivity type in the first surface of the body abutting the channel region and adjacent to the gate electrode, f) a first electrode on the first surface in ohmic contact with the second doped region and the gate electrode, and g) a second electrode on a second surface of the body opposite from the first surface, whereby an inversion region extends through the channel region and electrically connects the first electrode and the second electrode through the second doped region, the inversion region, and the body when the gate electrode is forward biased, the channel region underlaying all of the gate electrode providing reduced reverse bias leakage current between the first electrode and the second electrode, an the first doped region defines a vertical current path from the inversion region into the semiconductor body under the gate electrode between the first electrode and the second electrode.