Patent ID: 6858121
Filing Date: 2005-02-22
Classification: C25D,H01L

Abstract:
1. A method of plating a conductive top surface of a workpiece, the conductive top surface of the workpiece including a top portion and a cavity portion, the method comprising the steps of: applying, over the conductive top surface of the workpiece, an electrolyte solution with at least one additive disposed therein, the additive becoming adsorbed on the top portion and becoming adsorbed on the cavity portion; applying a mask in spaced relation to the top portion of the workpiece and creating a relative motion between the mask and the workpiece to remove from the top portion of the workpiece an amount of the additive previously adsorbed on the top portion through an indirect external influence; applying a voltage between an electrode and the conductive top surface of the workpiece; and plating the conductive top surface of the workpiece before the additive fully re-adsorbs onto the top portion and while the mask is maintained in at least the spaced relation to the top portion of the workpiece, thereby causing greater plating of the cavity portion relative to the top portion.