Patent ID: 6596622
Filing Date: 2003-07-22
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, the method comprising the steps of:forming a first pad over a base substrate; forming an insulating film layer over the first pad; defining a concave pad opening in the insulating film layer so as to expose substantially all of the surface of the first pad; forming a first barrier metal layer over the first pad and the insulating film layer so as to extend along the concave shape of the pad opening; forming a plug layer over the first barrier metal layer; performing chemical mechanical polishing on the plug layer and the first barrier metal layer to thereby expose the insulating film layer retaining at least a portion of the plug layer in the pad opening; forming a second barrier metal layer over the plug layer and insulating film layer exposed by said chemical mechanical polishing step; and forming a second pad over the second barrier metal layer, wherein said second pad is a bonding pad having an exposed portion of sufficient area to permit wire bonding.