Patent ID: 8450049
Filing Date: 2013-05-28
Classification: H01L

Abstract:
1. A process for forming an anti-oxidant metal layer on an electronic device comprising the steps of: providing a substrate having a plurality of bond pads and a protective layer, wherein the protective layer comprises a plurality of openings, and wherein the bond pads are revealed by the openings; forming a conductive metal layer on the substrate, such that the conductive metal layer is electrically connected with the bond pads, and such that the bond pads and the protective layer are covered by the conductive metal layer; forming a first photoresist layer on the conductive metal layer, such that the conductive metal layer is covered by the first photoresist layer; patterning the first photoresist layer to form a plurality of first apertures, a plurality of second apertures and a plurality of first grooves, wherein the first apertures are located on top of the bond pads, and wherein the conductive metal layer is revealed by the first apertures, the second apertures and the first grooves; forming a connecting member in each of the first apertures, each of the second apertures and each of the first grooves, wherein each of the connecting members comprises a top surface and a lateral surface, and wherein each of the connecting members is electrically with the conductive metal layer; removing the first photoresist layer to reveal the top surface and the lateral surface of each of the connecting members; forming a second photoresist layer on the conductive metal layer, wherein each of the connecting members is covered by the second photoresist layer; patterning the second photoresist layer to form a plurality of third apertures, a plurality of fourth apertures and a plurality of second grooves, wherein the third apertures are located on top of the bond pads, and wherein the top surface and the lateral surface of each of the connecting members are revealed by each of the third apertures, each of the fourth apertures and each of the second grooves; forming an anti-oxidant metal layer in each of the third apertures, each of the fourth apertures and each of the second grooves, wherein the top surface and the lateral surface of each of the connecting members is covered and sealed by the anti-oxidant metal layer so as to inhibit water mist from permeating into the connecting members; removing the second photoresist layer to reveal the anti-oxidant metal layer and the conductive metal layer; and using the connecting members and the anti-oxidant metal layer as a mask to remove the conductive metal layer which is not covered by the connecting members and the anti-oxidant metal layer.