Patent ID: 8232568
Filing Date: 2012-07-31
Classification: H01L

Abstract:
1. A device comprising: a first layer having top and bottom surfaces, said top surface comprising a first material of a first conductivity type and including a plurality of pits in a substantially planar surface, said top and bottom surfaces being characterized by a distance between said top and bottom surfaces, said distance being less in said pits than in said areas outside said pits; an active layer overlying said top surface of said first layer, said active layer generating light characterized by a wavelength when holes and electrons recombine therein; a second layer comprising a second material of a second conductivity type, said second layer comprising a cladding layer having a top surface and a bottom surface, said bottom surface overlying said active layer and conforming to said active layer, said top surface having depressions therein that extend into said pits; and a substrate on which said first layer is constructed, said substrate having a lattice constant sufficiently different from that of said first material to give rise to dislocations in said first layer, said pits being characterized by a bottom point that is closest to said substrate, said pits being located such that said bottom point of each of said pits lies on a different one of said dislocations.