Patent ID: 8242484

Claim:
A vertical geometry light emitting diode capable of emitting light in the electromagnetic spectrum wherein said light emitting diode comprises: a substrate; a lift-off layer coated on said substrate comprising Al X In Y Ga 1-X-Y N wherein 0.3<x≦1, 0≦y≦1, 0.3<x+y≦1; 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 bandgap of the two materials is not identical; 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; a multilayer ultraviolet 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; 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; 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; a second metallic contact formed on the second doped contact layer in a vertical geometry orientation.