Patent ID: 8294172

Claim:
A vertical topology light emitting diode, comprising: an adhesion structure comprising a first metal layer having a first surface and a second metal layer having a second surface; a conductive support structure over the first surface; a reflective structure over the second surface, the reflective structure also serving as a first electrical contact; a semiconductor device over the reflective structure, the semiconductor device comprising a first-type GaN-based layer, an active layer on the first-type GaN-based layer, and a second-type GaN-based layer on the active layer; and a second electrical contact over a surface of the semiconductor device, wherein the reflective structure and the second electrical contact are located over opposite surfaces of the semiconductor device, respectively, wherein the reflective structure comprises a reflective metal layer over the second surface of the adhesion structure and a metal contact directly on a surface of the reflective metal layer, wherein the reflective metal layer is thicker than the metal contact, wherein the metal contact contacts the first-type GaN-based layer, wherein the reflective structure reflects light from the semiconductor device on the surface of the reflective metal layer, wherein the surface of the reflective metal layer is a dominant reflective surface, wherein the reflective metal layer is a pure metal layer, wherein the first metal layer is thicker than the second metal layer, and wherein the reflective metal layer of the reflective structure and the first metal layer of the adhesion structure comprise different materials and wherein the reflective metal layer and the metal contact comprise different materials.