Patent ID: 8368115

Claim:
A vertical topology light emitting device, comprising: a conductive support structure; a conductive adhesion structure comprising a first metallic layer on the conductive support structure and a second metallic layer, the first metallic layer being thicker than the second metallic layer, wherein the first metallic layer comprises a first metal and the second metallic layer comprises a second metal different from the first metal; a reflective structure on the second metallic layer, the reflective structure also serving as a first electrode, wherein the reflective structure comprises a reflective metal layer and a metal contact directly on a surface of the reflective metal layer, wherein the reflective metal layer is thicker than the metal contact; a GaN-based semiconductor layer on the metal contact, the GaN-based semiconductor layer comprising an active layer, wherein the active layer comprises InGaN; wherein the reflective structure reflects light from the active layer, on the surface of the reflective metal layer, wherein the surface of the reflective metal layer is a dominant reflective surface, a second electrode on a surface of the GaN-based semiconductor layer, the second electrode comprising a first layer and a second layer on the first layer; and a metal pad on the second electrode, wherein the reflective structure reflects light from the active layer back through the surface of the GaN-based semiconductor layer.