Patent ID: 8026527
Filing Date: 2011-09-27
Classification: H01L

Abstract:
1. 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 second surface opposite to said first surface comprising features that scatter light striking said second surface; a layer of transparent electrically conducting material overlying said second surface; a first layer of dielectric material that is transparent to said light generated by said active layer overlying said layer of transparent electrically conducting material and having a first dielectric surface in contact with said layer of transparent electrically conducting material and a second dielectric surface opposite to said first dielectric surface; a mirror layer overlying said first layer of dielectric material, and in direct contact with said second dielectric surface; a second layer of dielectric material overlying said mirror layer, said mirror layer being encapsulated by said first and second layers of dielectric material; wherein said second dielectric surface is sufficiently smooth to ensure that said mirror layer has a reflectivity greater than 90 percent.