Patent ID: 7989828
Filing Date: 2011-08-02
Classification: H01L

Abstract:
1. A nitride-based top emission type light emitting device comprising: an n-nitride-based cladding layer; a p-nitride-based cladding layer; a nitride-based active layer interposed between the n-nitride-based cladding layer and the p-nitride-based cladding layer; and a p-ohmic contact multi-layer disposed on the p-nitride-based cladding layer, wherein the p-ohmic contact multi-layer includes at least one pair of an ohmic modification layer and a transparent current spread layer on the ohmic modification layer, the ohmic modification layer being a poly-crystal nitride layer or an amorphous nitride layer including nitrogen (N) combined with at least one of aluminum (Al), indium (In) and gallium (Ga), and wherein the ohmic modification layer is not a nitride-based epitaxial layer, and wherein the poly-crystal nitride layer or the amorphous nitride layer comprises micro-sized pores or dots aligned to have photonic crystal effect, wherein a new phase is formed at least at an interface between the ohmic modification layer and the current spread layer through chemical reaction therebetween by annealing.