Patent ID: 8502245
Filing Date: 2013-08-06
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: a first conductive type semiconductor layer; an active layer comprising a first active layer, a second active layer, and an electron barrier layer, the active layer being disposed on the first conductive type semiconductor layer, wherein the electron barrier layer is between the first active layer and the second active layer; and a second conductive type semiconductor layer on the active layer; a first semiconductor layer between the first active layer and the first conductive semiconductor layer; and a second semiconductor layer between the second active layer and the second conductive semiconductor layer, wherein the first active layer includes a first quantum well layer and a first quantum barrier layer and has a first cycle of the first quantum well layer and the first quantum barrier layer, wherein the second active layer includes a second quantum well layer and a second quantum barrier layer and has a second cycle of the second quantum well layer and the second quantum barrier layer, wherein the first cycle is different from the second cycle, wherein the electron barrier layer comprises an AlGaN based layer and is physically contacted with the second quantum well layer of the second active layer, wherein the electron barrier layer has a thickness different from a thickness of the first quantum barrier layer, and wherein the first quantum barrier layer has an energy band gap between an energy band gap of the electron barrier layer and an energy band gap of the first quantum well layer.