Patent ID: 7928448
Filing Date: 2011-04-19
Classification: H01L

Abstract:
1. A device comprising: a semiconductor structure comprising a III-nitride light emitting layer disposed between an n-type region and a p-type region; a porous III-nitride region comprising voids formed in a III-nitride material, the III-nitride material having a bulk lattice constant, defined as a lattice constant of a relaxed, free-standing material of the same composition as the III-nitride material; and a III-nitride layer comprising InN touching the porous III-nitride region and disposed between the light emitting layer and the porous III-nitride region, the III-nitride layer comprising InN having a bulk lattice constant, defined as a lattice constant of a relaxed, free-standing material of the same composition as the III-nitride layer comprising InN; wherein the bulk lattice constant of the III-nitride layer comprising InN is larger than the bulk lattice constant of the III-nitride material in the porous region.