Patent ID: 9559265
Date: 2017-01-31
CPC Classifications: H01L

Claim:
1. A flip-chip LED comprising: a sapphire substrate; an N-type ohmic contact layer formed and disposed on the substrate; a P-type ohmic contact layer formed and arranged at the N-type ohmic contact layer; a light emitting layer formed at an interface between the N-type ohmic contact layer and the P-type ohmic contact layer; a transparent conductive metal oxide layer formed and set on the P-type ohmic contact layer; two exposed electrodes with different polarities including a negative electrode and a positive electrode; and a multi-layer reflective layer covered over an outermost layer thereof; wherein the multi-layer reflective layer is manufactured by Physical Vapor Deposition (PVD) with a mask at one time to form each layer of the multi-layer reflective layer in turn on an outer surface of the flip-chip LED except the outer surface disposed with the exposed electrodes; wherein the mask is used to form a pattern of the multi-layer reflective layer so that a photoresist layer is disposed on surface of each of the two exposed electrodes with different polarities; then a pumping and venting process is used only once to form each layer of the multi-layer reflective layer in turn, and wherein the multi-layer reflective layer is formed by a non-conductive silicon dioxide (SiO2) film, a conductive aluminum film and a non-conductive silicon dioxide (SiO2) film; the conductive aluminum film is formed between the two non-conductive silicon dioxide (SiO2) films.