Patent ID: 8093583

Claim:
A light emitting diode (LED) comprising an active region between a GaN-based N-type compound semiconductor layer and a GaN-based P-type compound semiconductor layer, wherein the active region comprises a well layer and a barrier layer, the barrier layer having a superlattice structure, wherein the well layer comprises InGaN, the barrier layer comprises the superlattice structure in which InGaN and GaN are alternately laminated, and InGaN in the well layer contains a larger amount of In than InGaN in the barrier layer, and wherein the well layer comprises In x Ga (1-x) N, and the barrier layer comprises a lower superlattice having In y Ga (1-y) N and GaN alternately laminated, an upper superlattice having In y Ga (1-y) N and GaN alternately laminated, and a middle superlattice interposed between the lower superlattice and the upper superlattice, the middle superlattice having In z Ga (1-z )N and GaN alternately laminated, where 0<x<1, 0<y<0.05, 0<z<0.1 and y<z<x.