Patent ID: 6084304
Filing Date: 2000-07-04
Classification: H01L

Abstract:
A metallization structure, comprising:a semiconductor substrate, having a multi-interconnect layer;a top copper layer, deposited on the multi-interconnect layer;a passivation layer, deposited on the top copper layer, wherein a pad window is formed in the passivation layer to expose a portion of the top copper layer; anda conductive film, only formed on, and substantially fully covering an inner peripheral surface of the pad window including a vertical sidewall and a portion of the top copper layer exposed by the pad window, wherein the conductive film is used to protect the top copper layer from exposure to air, and includes a material other than copper, whereinthe conductive film results from a preliminary conductive film which covers over the passivation layer and the inner peripheral surface of the pad window, and a portion of the preliminary conductive layer above the passivation layer is removed by a chemical mechanical polish (CMP) technology.