Patent ID: 8492779

Claim:
A nitride semiconductor LED, comprising: a first silicon doped GaN based layer; a second silicon doped GaN based layer directly on the first silicon doped GaN based layer; an active layer directly on the second silicon doped GaN based layer, wherein the active layer is formed of a multi-quantum well structure including InGaN well layers and InGaN/GaN barrier layers; and a p-type GaN based layer on the active layer, wherein the second silicon doped GaN based layer comprises a semi-insulating GaN based layer or a low concentration of below 1×10 18 /cm 3 doped GaN layer, wherein an area of a lower surface of the second silicon doped GaN based layer is substantially equal to an area of a lower surface of the first silicon doped GaN based layer, and wherein the second silicon doped GaN based layer is directly contacted to one of the InGaN well layers of the active layer.