Patent ID: 7791098

Claim:
A nitride semiconductor light emitting device comprising: a substrate, an n-side nitride semiconductor layer and a p-side nitride semiconductor layer formed on said substrate, a light transmitting electrode formed on said p-side nitride semiconductor layer, a p-side pad electrode formed on said p-side nitride semiconductor layer for connection with an outside circuit, and an n-side pad electrode for connection of the n-side nitride semiconductor layer with the outside circuit, wherein end faces of said light transmitting electrode have non-uniform taper angles, wherein a side face of said substrate is perpendicular to a principal surface of the substrate in a region on the semiconductor layer side, and is inclined to the principal surface of the substrate in a region on the back side thereof, and wherein a width X of the p-side nitride semiconductor layer connected with said p-side pad electrode and a maximum width R p of said p-side pad electrode in a direction of shorter side of the substrate satisfy a relation of inequality X<2R p .