Patent ID: 8829559

Claim:
A nitride semiconductor light-emitting device comprising: at least one n-type nitride semiconductor layer, an active layer and at least one p-type nitride semiconductor layer stacked in this order on an upper surface of a substrate so as to form a nitride semiconductor region, said n-type nitride semiconductor layer having a partial exposed area formed by removing part of the p-type nitride semiconductor layer side, an n-side electrode pad formed on the partial exposed area of said n-type nitride semiconductor layer, a current diffusion layer formed on said p-type nitride semiconductor layer, a p-side electrode pad and a p-side branch electrode extended from the p-side electrode pad that are formed on said current diffusion layer, wherein sheet resistance Rs 2 of said current diffusion layer and sheet resistance Rs 1 of said n-type nitride semiconductor layer satisfy the relation of Rs 2 =x×Rs 1 where 1≦x≦4, in plan view of nitride semiconductor light-emitting device, said nitride semiconductor region has a rectangle shape having a first side and a second side, and a condition of 0.8≦Y/X<1 is satisfied, when the center of said p-side electrode pad and the center of said n-side electrode pad are connected with a straight line, the first side is parallel to said straight line and has a length of Y, and the second side is perpendicular to said straight line and has a length of X, and said p-side electrode pad and said n-side electrode pad are allocated at the center in the longer side direction and aligned along the shorter side direction of said nitride semiconductor region.