Patent ID: 8946677
Filing Date: 2015-02-03
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: a substrate; a first semiconductor layer including an n-type dopant on the substrate; an active layer having a multiple quantum well structure on the first semiconductor layer; a nitride-based semiconductor layer disposed between the active layer and the first semiconductor layer; a second semiconductor layer disposed on a top surface of the active layer; a third semiconductor layer on a top surface of the second semiconductor layer; a fourth semiconductor layer on a top surface of the third semiconductor layer; a first electrode on the first semiconductor layer; and a second electrode on the fourth semiconductor layer, wherein the second to fourth semiconductor layers include a p-type dopant, wherein the second and fourth semiconductor layers are formed of a p-type semiconductor layer, wherein the p-type semiconductor layer of the second semiconductor layer is formed of an InAlGaN semiconductor, wherein the third semiconductor layer is disposed between the top surface of the second semiconductor layer and a lower surface of the fourth semiconductor layer, wherein the third semiconductor layer has a concentration of the p-type dopant less than that of each of the second and fourth semiconductor layers, wherein the third semiconductor layer is formed of a lower conductive layer than that of each of the second and fourth semiconductor layers, and wherein the third semiconductor layer is formed of a GaN semiconductor.