Patent ID: 6297140
Filing Date: 2001-10-02
Classification: H01L,Y10T

Abstract:
A method for plating a second metal directly to a first metal, said method comprising the steps of:providing a semiconductor substrate including at least one metal feature and at least one insulating layer covering said metal feature and said substrate;forming at least one recess in said at least one insulating layer thereby exposing at least a portion of said metal feature;forming at least one conductive barrier layer over said insulating layer and said exposed portion of said metal feature;forming a plating seed layer of a first metal over said at least one barrier layer;depositing a photoresist layer over said plating seed layer;removing portions of said photoresist layer and portions of said plating seed layer outside of said at least one recess;removing photoresist remaining in said at least one recess; andelectroplating a second metal to said plating seed layer in said recess without utilizing a mask.