Patent ID: 8441017

Claim:
A schottky diode comprising: a SiC substrate including a first surface and a second surface opposite to the first surface; a semiconductor layer formed on the first surface of the SiC substrate; a schottky electrode in contact with the semiconductor layer; an ohmic electrode in contact with the second surface of the SiC substrate; and an insulation layer formed on the semiconductor layer and including a rear surface and a front surface opposite to the rear surface, the rear surface being closer to the semiconductor layer than the front surface is, the insulation layer being formed with an opening through which a part of the semiconductor layer is exposed; wherein the insulation layer includes an inner side surface defining the opening, the inner side surface being inclined with respect to a normal direction of the first surface of the SiC substrate so that the opening becomes greater in cross section as proceeding away from the semiconductor layer, wherein the schottky electrode extends from the exposed part of the semiconductor layer, on the inner side surface of the insulation layer, and onto the front surface of the insulation layer, wherein a schottky barrier height between the semiconductor layer and the schottky electrode is in a range from 1.3 through 1.7 eV.