Patent ID: 7884379

Claim:
A nitride semiconductor light emitting device comprising: a substrate, an n-type nitride semiconductor layer formed on the substrate; a p-type nitride semiconductor layer formed on the n-type nitride semiconductor layer, an n-side pad electrode formed on a surface of the n-type nitride semiconductor layer which is exposed by removing a part of the p-type nitride semiconductor layer and a part of the n-type nitride semiconductor layer, a translucent electrode formed on the p-type nitride semiconductor layer, and a p-side pad electrode formed within a surface of the translucent electrode, wherein the translucent electrode is formed from an electrically conductive oxide, the n-side pad electrode adjoins a periphery of the translucent electrode and the p-side pad electrode is disposed so as to satisfy the following relationships: 0.4L≦X≦0.7L and 0.25L≦Y≦0.55L where X is a distance between ends of the p-side pad electrode and the n-side pad electrode, Y is a distance between an end of the p-side pad electrode on a side opposite to the n-side pad electrode and a periphery of the translucent electrode on a line connecting centroids of the n-side pad electrode and the p-side pad electrode, L is a length of the translucent electrode on the line connecting centroids of the n-side pad electrode and the p-side pad electrode minus an outer diameter d of the p-side pad electrode.