Patent ID: 7601985

Claim:
A semiconductor light-emitting device comprising: a substrate; a first conductivity type layer formed on the substrate and including a plurality of group III-V nitride semiconductor layers of a first conductivity type; an active layer formed on the first conductivity type layer; and a second conductivity type layer formed on the active layer and including a group III-V nitride semiconductor layer of a second conductivity type, wherein the first conductivity type layer includes: an intermediate layer made of Al x Ga 1−x−y In y N (wherein 0.001≦x<0.05, 0<y<1 and x+y<1), a first layer formed between the substrate and the intermediate layer, and a second layer formed between the intermediate layer and the active layer, and the first layer and the second layer contain impurities of the first conductivity type, and concentrations of the impurities are equal to each other.