Patent ID: 8154036

Claim:
A nitride semiconductor device, comprising: at least an n-electrode; an n-type semiconductor layer; an active layer; a p-type semiconductor layer; and a p-electrode sequentially, wherein the n-type semiconductor layer includes an n-type GaN contact layer of n-type impurity-doped GaN having an electron concentration ranging from 5×10 16 cm −3 to 5×10 18 cm −3 , and a generating layer comprised of at least one of Al x Ga 1-x N (0<x<1) and In x Ga 1-x N (0<x<1), wherein the n-electrode is provided on one main surface of the n-type GaN contact layer wherein the p-electrode is a transparent electrode and is provided on one main surface of the p-type semiconductor layer, wherein the nitride semiconductor device further comprises: an electron accumulation layer provided on another main surface of the n-type GaN contact layer for accumulating electrons at a boundary surface with the n-type GaN contact layer; a reflecting mirror film provided on the p-electrode; an adhesive film provided on the reflecting mirror film; and a supporting substrate bonded to the reflecting mirror film via the adhesive film, wherein the generating layer is provided on another main surface of the n-type GaN contact layer and generates an electron accumulation layer for accumulating electrons at a boundary surface with the n-type GaN contact layer.