Patent ID: 7977664
Filing Date: 2011-07-12
Classification: H01L

Abstract:
1. A nitride semiconductor light emitting device for emitting ultraviolet light comprising: a substrate; at least one nitride semiconductor layer grown on the substrate and including a top layer of Al a single quantum well layer grown on the top layer of Al an additional nitride semiconductor layer grown on the In-rich InGaN quantum well layer and having a band gap energy higher than that of the In-rich InGaN quantum well layer; wherein the In-rich InGaN quantum well layer comprises an In-rich region formed of In wherein the light emitting device is configured to emit ultraviolet light using said In-rich InGaN quantum well layer, wherein the quantum well layer is grown using an In source and a nitrogen source, and the thickness of the quantum well is reduced by growth interruption which is performed by supplying the nitrogen source with the supply of the In source intercepted to flatten the surface of the quantum well layer.