Patent ID: 8258541

Claim:
A gallium nitride-based compound semiconductor light-emitting device comprising a substrate; an n-type semiconductor layer, a light-emitting layer, and a p-type semiconductor layer, the layers being formed of a gallium nitride-based compound semiconductor and being stacked in this order on the substrate; a positive electrode which is provided so as to contact the p-type semiconductor layer; and a negative electrode which is provided so as to contact the n-type semiconductor layer, wherein the positive electrode is a positive electrode having openings, and at least a portion of the surface of the p-type semiconductor layer corresponding to the openings are roughened surfaces whose apical portions are semispherical, wherein a density of protruding portions (particulates) of the roughened surface is from 1×10 5 pieces/mm 2 to 1×10 8 pieces/mm 2 .