Patent ID: 6952024
Filing Date: 2005-10-04
Classification: H01L,H01S

Abstract:
1. A light emitting device comprising: a silicon carbide substrate; a cladding layer consisting essentially of an epitaxial layer of silicon carbide on said substrate; a Group III nitride cladding layer of Al an active layer of Al wherein the molar fraction of aluminum in said Group III nitride cladding layer is greater than the molar fraction of aluminum in said active layer; wherein said silicon carbide cladding layer and said Group III nitride cladding layer have respective bandgaps that are larger than the bandgap of said active layer; and wherein said silicon carbide substrate, said silicon carbide cladding layer, and said active layer are doped layers of the same conductivity type, and said Group III nitride cladding layer is doped to the opposite conductivity type.