Patent ID: 8338848

Claim:
A device comprising: a first layer comprising a material of a first conductivity type; an active layer overlying said first layer, said active layer generating light when holes and electrons recombine therein; a second layer comprising a material of a second conductivity type, said second layer having a first surface overlying said active layer and a rough surface opposite to said first surface comprising features that scatter light striking said rough surface; a layer of transparent electrically conducting material deposited on said rough second surface; a first layer of a dielectric material that is transparent to said light generated by said active layer, said first layer having a first surface in contact with said layer of transparent electrically conducting material and a second surface; and a reflective layer deposited on said second surface of said first dielectric layer, wherein said reflective layer has a reflectivity greater than 90%, and wherein said reflective layer would have a reflectivity less than 70% if deposited directly on said layer of transparent electrically conducting material; further comprising a second layer of a dielectric material overlying said reflective layer, said reflective layer being encapsulated by said first and second layers of dielectric material.