Patent ID: 8384100

Claim:
An In x Ga y Al 1-x-y N (0<=x<=1, 0<=y<=1) light-emitting device, the device comprising: a conductive substrate configured with a front surface and a back surface, wherein the conductive substrate comprises a conductive Si substrate having a crystal orientation of (100), and wherein both sides of the conductive Si substrate are deposited with an ohmic contact layer stack comprising: a Pt layer, a Au layer, and a Au—In alloy layer; a metal bonding layer situated on the front surface of the conductive substrate; a light-reflection layer situated on the metal bonding layer; an In x Ga y Al 1-x-y N (0<=x<=1, 0<=y<=1) semiconductor multilayer structure situated on the light-reflection layer, wherein the In x Ga y Al 1-x-y N multilayer structure comprises at least one p-type layer and one n-type layer, and wherein the p-type layer is coupled to the light-reflection layer; and wherein the conductive substrate is electrically coupled to the p-type layer via the light-reflection layer and the metal bonding layer; and two electrodes, wherein one electrode is situated on the In x Ga y Al 1-x-y N semiconductor multilayer structure, and the other electrode is in direct contact with the back surface of the conductive substrate.