Patent ID: 6409903
Filing Date: 2002-06-25
Classification: C25D,Y10S

Abstract:
A multistep electroplating process for electroplating a substrate containing a seed layer thereon with copper or other metal comprising the steps of:inserting the substrate having the seed layer thereon to initiate metal plating into an electroplating apparatus comprising a metal plating solution, an anode and multiple cathode electrical perimeter contacts to the seed layer; exposing the seed layer, anode and the perimeter contacts to the metal plating solution; plating onto the seed layer and substrate by applying to the anode and cathode perimeter contacts for a first time period a voltage below a predetermined threshold voltage which was empirically determined to cause burn-through of the seed layer; and continuing the plating onto the plated substrate by applying after the first time period a current to the anode and cathode perimeter contacts for a second time period the current producing a voltage below the predetermined threshold voltage.