Patent ID: 7105857
Filing Date: 2006-09-12
Classification: H01L

Abstract:
1. A nitride semiconductor device comprising: a substrate having two opposed main faces and having a thermal expansion coefficient higher than that of a nitride semiconductor; a bonding layer placed on one main face of said substrate and comprising an eutectic layer; a p-electrode on said bonding layer; one or more p-type nitride semiconductor layers electrically connected to the p-electrode; an active layer comprising at least a well layer of Al one or more n-type nitride semiconductor layers on said active layer; a n-electrode electrically connected to one or more of said n-type nitride semiconductor layers; wherein said p-type nitride semiconductor layers, said active layer and said n-type nitride semiconductor layers are sandwiched between said p-electrode and said n-electrode, and wherein said n-type nitride semiconductor layers contain Al at least in a part of said n-type nitride semiconductor layers that is in contact with said n-electrode.