Patent ID: 8659041

Claim:
A nitride semiconductor light emitting diode comprising at least an n-type nitride semiconductor layer, an active layer, and a p-type nitride semiconductor layer, wherein said active layer is formed of one first nitride semiconductor layer having a highest In (Indium) ratio in said nitride semiconductor light emitting diode, said nitride semiconductor light emitting diode further comprises at least one of a second nitride semiconductor layer located between said active layer and said n-type nitride semiconductor layer and including an InGaN layer, and a third nitride semiconductor layer located between said active layer and said p-type nitride semiconductor layer and including an InGaN layer, respective In ratios of the InGaN layer included in said second nitride semiconductor layer and the InGaN layer included in said third nitride semiconductor layer are lower than the In ratio of the first nitride semiconductor layer forming said active layer, in each of said second nitride semiconductor layer and said third nitride semiconductor layer, not less than two nitride semiconductor layers form a periodic structure, respective In ratios of said not less than two nitride semiconductor layers are lower than the In ratio of the first nitride semiconductor layer forming said active layer, each of said not less than two nitride semiconductor layers forming said periodic structure includes a GaN layer and an InGaN layer, and the GaN layer or the InGaN layer forming the periodic structure of said second nitride semiconductor layer is doped with at least one of Si and Ge.