Patent ID: 7535026
Filing Date: 2009-05-19
Classification: H01L

Abstract:
1. A semiconductor light-emitting device, comprising: a semiconductor substrate; semiconductor layers formed on the semiconductor substrate, the semiconductor layers comprising an n-type cladding layer, an active layer, a p-type cladding layer, a p-type buffer layer, and a p-type contact layer; and a current spreading layer formed on the p-type contact layer, the current spreading layer comprising a metal-oxide material, wherein the active layer comprises (Al the n-type cladding layer and the p-type cladding layer respectively comprise (Al the p-type buffer layer comprises Al the p-type cladding layer and the p-type buffer layer comprise Mg as a main dopant, the p-type contact layer comprises Zn as a main dopant, and a part or all of the p-type buffer layer comprises Mg-doped buffer layer and an undoped layer, the undoped buffer layer being provided at a side of the p-type contact layer.