Patent ID: 11876147
Assignee: THE REGENTS OF THE UNIVERSITY OF MICHIGAN
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A method of fabricating a device, the method comprising:
forming a buffer layer over a substrate;
forming an undoped aluminum gallium nitride (AlGaN) layer over the buffer layer; and
forming one or more layers above the undoped AlGaN layer, the one or more layers comprising a magnesium (Mg)-doped AlGaN layer and a p-doped contact layer, wherein the Mg-doped AlGaN layer is formed by:
depositing Mg, Al, Ga, and N in a layer using molecular beam epitaxy (MBE), wherein excess Ga is provided during said depositing and forms a liquid Ga layer on the Mg-doped AlGaN layer, wherein the liquid Ga layer causes formation of a metal-semiconductor junction during epitaxy of the Mg-doped AlGaN layer, and wherein the liquid Ga layer is smooth and conformal across the Mg-doped AlGaN layer throughout said depositing.