Patent ID: 6402925
Filing Date: 2002-06-11
Classification: B23H,B24B,C25D,H01L

Abstract:
A method of depositing a conductive material from an electrolyte solution on a workpiece having a top surface and a cavity portion disposed on the top surface and having a conductive layer disposed on the top surface and the cavity portion of the work piece and subsequently removing some of the deposited conductive material comprising the steps ofapplying a first potential difference between the workpiece and an electrode; and starving electrolytic solution from the conductive top surface of the conductive layer of the workpiece but not from the conductive cavity portion of the conductive layer of the workpiece while applying the first potential difference so that accumulation of conductive material on the conductive cavity portion of the conductive layer occurs at a greater rate than accumulation of the conductive material on the conductive top surface of the conductive layer; after the accumulation of conductive material in the cavity portion of the workpiece, providing a second potential difference having a polarity that is opposite the first potential difference between the workpiece and the electrode such that removal of some of the previously accumulated conductive material from the conductive layer of the workpiece takes place; and polishing the conductive layer with the previously accumulated conductive material disposed thereover at the same time that the step of providing the second potential difference is occurring.