Patent ID: 6413863
Filing Date: 2002-07-02
Classification: H01L,Y10S

Abstract:
A method for forming an AlCu pad for copper line interconnect, comprising the steps of:providing a semiconductor substrate whereby said substrate has been provided with one or more electrical contact points and a surface passivation layer whereby furthermore openings have been created in said passivation layer that overlay and align with one or more of said electrical contact points; rf sputter depositing a layer of AlCu over the surface of said layer of passivation thereby including said openings within said layer of passivation; and patterning and etching said layer of AlCu, said patterning and etching said layer of AlCu creating a pattern of AlCu bond pads that overlays said one or more of said electrical contact points in a surface of said substrate, further creating a pattern of dummy depositions of AlCu on a surface of said layer of passivation surrounding said pattern of AlCu bond pads whereby said dummy depositions of AlCu are not further interconnected to any surrounding device elements.