Patent ID: 8357946

Claim:
A nitride semiconductor light emitting device comprising: a support base comprising a hexagonal gallium nitride, the support base including a semipolar primary surface inclined with respect to a plane perpendicular to a c-axis of the hexagonal gallium nitride; a light emitting layer provided on the support base, the light emitting layer comprising a gallium nitride-based semiconductor; an In X1 Al Y1 Ga 1-X1-Y1 N (0<X 1 <1, 0<Y 1 <1, X 1 +Y 1 <1) layer provided between the support base and the light emitting layer; and a p-type gallium nitride-based semiconductor layer, the support base, the In X1 Al Y1 Ga 1-X1-Y1 N layer, the light emitting layer, and the p-type gallium nitride-based semiconductor layer being arranged in order along a normal axis to the semipolar surface of the support base, the light emitting layer having a quantum well structure, the quantum well structure comprising an InGaN layer, a thickness of the In X1 Al Y1 Ga 1-X1-Y1 N layer being larger than a thickness of the quantum well structure, a bandgap of the In X1 Al Y1 Ga 1-X1-Y1 N layer being not less than a bandgap of the hexagonal gallium nitride, the In X1 Al Y1 Ga 1-X1-Y1 N layer being doped with an n-type dopant, and a c-plane of the In X1 Al Y1 Ga 1-X1-Y1 N layer being inclined with respect to the normal axis.