Patent ID: 7952116

Claim:
A gallium nitride-based compound semiconductor light-emitting device comprising an n-type semiconductor layer, a light-emitting layer and a p-type semiconductor layer which are formed in this order on a substrate, wherein each layer comprises a gallium nitride-based compound semiconductor, the light-emitting device has a negative electrode and a positive electrode provided on the n-type semiconductor layer and on the p-type semiconductor layer, respectively, the positive electrode is at least partially formed of a transparent electrically conducting film comprising a transparent electrically conducting material, the transparent electrically conducting film is at least partially in contact with the p-type semiconductor layer, and a region having a semiconductor metal concentration of 20 at.% or more based on all metals in the transparent electrically conducting film is present in the transparent electrically conducting film on the semiconductor side surface of the transparent electrically conducting film, and wherein a positive electrode metal mixed layer containing a metal component of the transparent electrically conducting film is present in the p-type semiconductor layer, wherein the concentration of the transparent electrically conducting film metal component in the positive electrode metal mixed layer is from 0.1 to 20 at. % based on all metals in the positive electrode metal mixed layer.