Patent ID: 8729580

Claim:
A light emitting device comprising: a substrate portion having a top surface and a bottom surface; a back reflector formed on the bottom surface of the substrate portion; a light emitting portion formed on the top surface of the substrate portion, the light emitting portion having a flat top surface; a coating layer portion comprising a first coating layer of ITO and a second coating layer, wherein the first coating layer is in direct physical contact with the flat top surface of the light emitting portion and has a contiguous flat top surface, and the second coating layer is in direct physical contact with the first coating layer and has a top surface with a three dimensional pattern formed on the flat top surface of the first coating layer, the three dimensional pattern chosen from a group consisting of ribs, cylinders, polygon shaped ribs, triangular shaped ridges, hemispherical shaped mounds, horizontal cylindrical shaped ribs, ellipsoids, hemispheres, rectilinear trenches, rectilinear solids, cones, angled cylinders, angled hemispheres, angled ellipsoids, angled rectilinear trenches, angled solids and angled cones and wherein element to element spacing may be uniform or not, wherein the second coating layer has an index of refraction greater than 2 and an optical loss factor less than 0.2 and is chosen from a group consisting of metal oxides, silicon carbide, Ta 2 O 5 , Nb 2 O 5 , TiO 2 , and their non-stoichiometric mixtures; and a metal contact formed in direct contact with the first coating layer, the three dimensional pattern formed on the flat top surface of the first coating layer has a top portion higher than a top surface of the metal contact.