Patent ID: 7592634

Claim:
A semiconductor light emitting diode comprising: a conductive substrate with a metal contact on one face of said substrate; a first epitaxial region of Group III-nitride on the opposite face of said substrate, said epitaxial region having a first conductivity type; a second epitaxial region of Group III-nitride on said first epitaxial region, said second epitaxial region having a second conductivity type opposite said first conductivity type; said first and second epitaxial regions forming a p-n junction therebetween; a Group III-nitride isolation region on said first epitaxial region and adjacent said second epitaxial region, said Group III-nitride isolation region having an increased resistivity compared to said second epitaxial region; said Group III nitride isolation regions electrically isolating portions of said p-n junction; and a lead frame attached to said epitaxial regions of said light emitting diode by a die attach metal for defining a current path through said epitaxial regions and through said conductive substrate to said metal contact on said substrate with said isolation region preventing unwanted metal-semiconductor connections between said lead frame and said p-n junction.