Patent ID: 6706166
Filing Date: 2004-03-16
Classification: C25D,H01L

Abstract:
A method for improving a electrodeposited metal film uniformity and preventing metal deposition and peeling of deposited metal from an electrode during an electrodeposition and electropolishing process comprising the steps of:providing a first anode electrode assembly and a semiconductor wafer plating surface disposed in an electrolyte bath comprising a plating metal for deposition onto the semiconductor wafer plating surface; providing at least one additional anode electrode assembly comprising the plating metal disposed peripheral to the first anode electrode assembly for selectively applying the cathodic electrical potential during an electropolishing process; and, periodically alternating between an electrodeposition process and electropolishing process with respect to the semiconductor wafer plating surface such that the plating metal is preferentially plated onto the at least one additional electrode assembly.