Patent ID: 8361898

Claim:
A method for fabricating a bonding pad structure for an optoelectronic device, comprising: providing the optoelectronic device reversely placed on a carrier substrate, wherein the optoelectronic device has a bonding pad region and an optoelectronic device region, wherein the optoelectronic device comprises: a semiconductor substrate; an insulating layer disposed between the carrier substrate and the semiconductor substrate; and at least one bonding pad embedded in the insulating layer corresponding to the bonding pad region; removing a portion of the semiconductor substrate that corresponds to the bonding pad region to expose a portion of the insulating layer; forming a cap layer directly on the remaining portion of the semiconductor substrate that corresponds to the optoelectronic device region and on the exposed portion of the insulating layer; successively etching the cap layer and the insulating layer under the cap layer to form an opening exposing the bonding pad; and forming a conductive buffer layer in the opening to directly contact the at least one bonding pad.