Patent ID: 7368759
Filing Date: 2008-05-06
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: a light-emitting portion formed on a semiconductor substrate, the light-emitting portion comprising an n-type cladding layer, an active layer and a p-type cladding layer; an As-based p-type contact layer formed on the light-emitting portion, the p-type contact layer being doped with a dopant at a concentration of 1×10 a current spreading layer formed on the p-type contact layer, the current spreading layer comprising a metal oxide material; and a buffer layer formed between the p-type cladding layer and the p-type contact layer, wherein the buffer layer comprises a group III/V semiconductor with a p-type conductivity and hydrogen included intentionally or unavoidably therein, and the buffer layer comprises a thickness equal to or greater than a diffusion length L of a dopant doped into the p-type contact layer.