Patent ID: 7973318

Claim:
A schottky diode comprising: a SiC substrate including a first surface and a second surface facing away from the first surface; a semiconductor layer formed on the first surface of the SiC substrate; an annular guard ring formed in the semiconductor layer; an insulation layer covering part of the guard ring; a schottky electrode in contact with the semiconductor layer, the schottky electrode overlapping both the guard ring and the insulation layer; a metal layer covering the schottky electrode and overlapping both the guard ring and the insulation layer; and an ohmic electrode in contact with the second surface of the SiC substrate; wherein the first surface of the SiC substrate is provided by a (000-1) C surface, wherein the schottky electrode is made of Mo, and a schottky barrier height between the semiconductor layer and the schottky electrode is greater than 1.3 eV and not greater than 1.7 eV.