Patent ID: 8089081

Claim:
A semiconductor light emitting device comprising: a substrate; an electrode layer; and a semiconductor multilayer film disposed between the substrate and the electrode layer, the semiconductor multilayer film comprising: an n-type semiconductor layer; a p-type semiconductor layer; and an active layer disposed between the n-type semiconductor layer and the p-type semiconductor layer, wherein the semiconductor multilayer film has a light extraction surface from which a light emitted in the semiconductor multilayer film is extracted, the light extraction surface being formed with a relief structure having nano-scaled convex portions, wherein the relief structure is formed to have variation in equivalent circular diameters of the convex portions, and wherein 90% or more of the convex portions in the relief structure are configured to have circularity coefficient of (4π×(area)/(circumferential length) 2 ) being equal to or larger than 0.7.