Patent ID: 6140709
Filing Date: 2000-10-31
Classification: B81B,B81C,G01C,G01P,H01L

Abstract:
A bonding pad structure, comprising:a substrate;an electrically insulating sacrificial layer situated on the substrate and including a contact hole;a patterned conductor path layer buried in the electrically insulating sacrificial layer;a bonding pad base composed of an electrically conductive material, the bonding pad base including a first region which extends over the electrically insulating sacrificial layer and a second region which extends through the contact hole, the second region contacting the patterned conductor path layer; anda protective layer at least temporarily provided on a particular region of the electrically insulating sacrificial layer, the particular region being beneath the bonding pad base and around the bonding pad base, the protective layer preventing the electrically insulating sacrificial layer from being underetched beneath the bonding pad base when the electrically insulating sacrificial layer is being etched such that at least one of the substrate and the patterned conductor path layer is exposed.