Patent ID: 9172017
Filing Date: 2015-10-27
Classification: H01L,H01S

Abstract:
1. A semiconductor device comprising: a first semiconductor layer of an n type including a nitride semiconductor; a first metal layer of an alloy containing Al, Au and Ni, the first metal layer being in contact with the first semiconductor layer; a second metal layer in contact with the first metal layer, the second metal layer including a metal different from Al, the first metal layer being disposed between the second metal layer and the first semiconductor layer, wherein a ratio of Ni in the alloy is not less than 0.05 and not more than 0.14, a ratio of Al in the alloy is not less than 0.14 and not more than 0.34, a ratio of Au in the alloy is not less than 0.55 and not more than 0.84, and a total of the ratio of the Ni, the ratio of the Al, and the ratio of the Au is 1.