Patent ID: 8823026

Claim:
A nitride-based semiconductor light-emitting device, comprising a semiconductor multilayer structure having a growing plane which is an m-plane and being made of a GaN-based semiconductor, wherein the semiconductor multilayer structure includes a n-type semiconductor layer, a p-type semiconductor layer, a p-side electrode provided on the p-type semiconductor layer, and an active layer interposed between the n-type semiconductor layer and the p-type semiconductor layer, a ratio of a thickness of the active layer to a thickness of the n-type semiconductor layer, D, is in the range of 1.8×10 −4 ≦D≦14.1×10 −4 , an area of the p-side electrode, S, is in the range of 1×10 2 μm 2 ≦S≦9×10 4 μm 2 , and a maximum current density which leads to 88% of a maximum of the external quantum efficiency is not less than 2 A/mm 2 .