Patent ID: 7018915

Claim:
A method of forming a p-electrode on a device including a p-type Group III nitride compound semiconductor, said method comprising: forming said p-electrode comprising a member selected from a group consisting of tantalum nitride (TaN x ) and tantalum titanium nitride (Ta y Ti 1−y N z ) on said p-type Group III nitride compound semiconductor by a reactive sputtering with a mixing gas of nitrogen and a rare gas, wherein said p-electrode comprises a mixture of said member selected from the group consisting of tantalum nitride (TaN x ) and tantalum titanium nitride (Ta y Ti 1−y N z ) and at least one of titanium nitride (TiN), zirconium nitride (ZrN), niobium nitride (NbN), and tungsten nitride (WN).