Patent ID: 8106417
Filing Date: 2012-01-31
Classification: H01L

Abstract:
1. A vertical topology light emitting device, comprising: a semiconductive device having a first surface, a second surface and a light emitting layer, the semiconductive device comprises a first-type GaN-based layer, an active layer, and a second-type GaN-based layer; a first electrode on the first surface of the semiconductive device; a reflective structure on the second surface of the semiconductive device, wherein the reflective structure serves as a second electrode to the semiconductive device, wherein the reflective structure reflects light from the semiconductive device back through the first surface of the semiconductive device, wherein the reflective structure comprises a metal contact on the second surface of the semiconductor device and a reflective metal layer directly on the metal contact, wherein the reflective metal layer is thicker than the metal contact, wherein the metal contact is a pure metal and directly contacts the first-type GaN-based layer, and wherein the reflective metal layer and the metal contact comprise different materials; a conductive adhesion structure on the reflective structure; a conductive support structure on the conductive adhesion structure; a metal contact pad on the first electrode; and an inter-layer between the first electrode and the metal contact pad, wherein the inter-layer is located over the conductive adhesion structure, wherein the conductive adhesion structure comprises a first metallic layer and a second metallic layer, wherein the first metallic layer is located proximate to the conductive support structure and the second metallic layer is located proximate to the reflective structure, wherein the first metallic layer comprises Au, and wherein the first metallic layer is thicker than the second metallic layer.