Patent ID: 8652958

Claim:
A process for forming a vertical geometry light emitting diode capable of emitting light in the electromagnetic spectrum comprising: providing a substrate; coating said substrate with a lift-off layer comprising Al X In Y Ga 1-X-Y N wherein 0.3<x<1, 0<y<1, 0.3<x+y<1; growing a strain relief superlattice layer on said lift-off layer wherein said strain relief superlattice layer comprises repeating periods of Al X In Y Ga 1-X-Y N and Al r In s Ga 1-r-s N wherein 0.1≦x≦1, 0≦y≦1, 0.1≦x+y≦1, and 0<r≦1, 0≦s≦1, 0<r+s≦1 and the band gap of the two materials is not identical; growing a first doped layer on said strain relief superlattice layer wherein said first doped layer comprises Al X In Y Ga 1-X-Y N wherein 0<x<1, 0<y<1, 0<x+y<1 and said first doped layer has a first conductivity and a backside; growing a multilayer UV emitting quantum well region on said first doped layer comprising alternating layers of: a quantum well comprising Al X In Y Ga 1-X-Y N wherein 0<x≦1, 0≦y≦1, and 0<x+y≦1; and a barrier layer on each surface of said quantum well having a band gap larger than a quantum well bandgap and said barrier layer comprises Al X In Y Ga 1-X-Y N wherein 0<x≦1, 0≦y≦1, 0<x+y≦1 and wherein said multilayer quantum well terminates with said barrier layer on each side thereof; growing a second doped layer on said quantum well region wherein said second doped layer comprises Al X In Y Ga 1-X-Y N wherein 0<x<1, 0<y<1, 0<x+y<1 and said second doped layer has a different conductivity and dopant type than said first doped layer; growing a contact layer on said second doped layer comprising Al X In Y Ga 1-X-Y N wherein 0<x<1, 0<y<1, 0<x+y<1 wherein said contact layer has a different conductivity than said second doped layer; removing said substrate by a laser assisted lift-off process; lifting off said strain relief superlattice layer and said lift-off layer; forming a first ohmic contact on the backside of the first doped layer; and forming a second ohmic contact on the contact layer in a vertical geometry orientation.