Patent ID: 7204917

Claim:
An electrochemical mechanical processing apparatus for processing comprising: a workpiece surface influencing device comprising a top surface having a sweeping surface comprising a ceramic material that presents a substantially planar contact area to a conductive surface of the wafer, wherein the substantially planar contact area includes a plurality of contact regions, each of the contact regions including a region top surface that is substantially planar with other region top surfaces; a plurality of channels formed through the top surface, the channels being configured to communicate electrolyte therethrough to the conductive surface of the wafer while relative movement and physical contact exists between the sweeping surface and the conductive surface, wherein each of the plurality of contact regions is formed over a conducting material, the conducting material having recessed and raised regions, the ceramic material coating the raised and recessed regions to define the contact regions; and an electrode configured to be in contact with the electrolyte while relative movement and physical contact exists between the sweeping surface and the conductive surface.