Patent ID: 7071526
Filing Date: 2006-07-04
Classification: H01L

Abstract:
1. A semiconductor device comprising a semiconductor layer which comprises a Group III–V compound semiconductor using Ga v ,Al 1-v , (where, 0≦v≦1) as a main component of the Group III-elements and N as a main component of the Group V-elements and a Schottky junction metal layer which is in contact with the semiconductor layer, wherein: said Schottky junction metal layer comprises a laminated structure wherein a first metal layer is in contact with said semiconductor layer, a second metal layer is in contact with said first metal layer, and a third layer is in contact with said second layer; said second metal layer comprises a metal material having a higher melting point than those of the metal materials in said first metal layer and said third metal layer; said third metal layer comprises a metal material having a lower resistivity than those of the metal materials in said first metal layer and said second metal layer; said first metal layer comprises any metal material selected from a group comprising Ni said second metal layer comprises any metal material selected from a group comprising Mo, W, Ta, Mo