Patent ID: 8279904
Filing Date: 2012-10-02
Classification: B82Y,H01L,H01S

Abstract:
1. A light-emitting device, comprising: an active layer having a quantum well layer, barrier layers on opposite surfaces of the quantum well layer, and diffusion preventing layers each formed between the quantum well layer and at least one of the barrier layers in order to prevent diffusion of indium, wherein the diffusion preventing layers have a thickness of 0.2 nm-6 nm; a stacked structure including an n-type semiconductor layer including a n-type cladding layer and a n-type optical waveguide layer, and a p-type semiconductor layer including a p-type optical waveguide layer and a p-type cladding layer on opposite surfaces of the active layer; and a carrier barrier layer between the active layer and the p-type semiconductor layer to prevent diffusion of an p-type impurity from the p-type semiconductor layer into the active layer, wherein the diffusion preventing layers are formed between the quantum well layer and each of the barrier layers, the quantum well layer is formed of In the barrier layers are formed of In the diffusion preventing layers are formed of In