Patent ID: 7663151
Filing Date: 2010-02-16
Classification: H01L

Abstract:
1. A light emitting device comprising: a light emitting layer section based on a double heterostructure in which a first-conductivity-type cladding layer, an active layer and a second-conductivity-type cladding layer, each of which being composed of a compound semiconductor having a composition allowing lattice matching with GaAs, out of compound semiconductors expressed by formula (Al a GaP transparent semiconductor layer stacked on said light emitting layer section as being agreed with a crystal orientation thereof, being formed by dicing so that {100} surfaces appear on side faces of said GaP transparent semiconductor layer as the side faces of the device, wherein: said GaP transparent semiconductor layer has surface roughening projections formed on the side faces thereof by anisotropic etching operatively resulting in said light emitting device comprising surface roughening projections that are rounded and that have curved surfaces on an end portion side of the surface projections, and wherein each of said surface roughening projections has a main body composing the projection base and is thinned towards the end portion side thereof and has a swelled tip portion integrated with said main body, as being swelled out in a ball form on the end portion side thereof, wherein the tip swelled out in a ball form and the main body composing the projection base are of the same material.