Patent ID: 8836071

Claim:
A method of fabricating a Schottky diode using gallium nitride (GaN) materials, the method comprising: providing an n-type GaN substrate having a first surface and a second surface, the second surface opposing the first surface; forming an ohmic metal contact electrically coupled to the first surface of the n-type GaN substrate; forming an n-type GaN epitaxial layer coupled to the second surface of the n-type GaN substrate; forming an n-type aluminum gallium nitride (AlGaN) surface layer coupled to the n-type GaN epitaxial layer; and forming a Schottky contact electrically coupled to the n-type AlGaN surface layer, wherein, during operation, an interface between the n-type GaN epitaxial layer and the n-type AlGaN surface layer is substantially free from a two-dimensional electron gas, and wherein the n-type GaN epitaxial layer comprises a polar GaN material.