Patent ID: 7201829
Filing Date: 2007-04-10
Classification: B24B,C25D,C25F,H01L

Abstract:
1. A mask plate apparatus for use in an electrochemical processing device in which a solution becomes disposed onto a workpiece and electrochemical processing of the workpiece is performed while relative movement and physical contact exists between the apparatus and a top surface of the workpiece, the apparatus comprising: a pad having a top surface and a bottom surface, the top surface including a processing area that aligns with the workpiece; a plurality of channels formed in the top surface of the pad within the processing area: at least one contact portion formed in the top surface of the pad at a location different than the plurality of channels; at least one hole disposed between the top surface and the bottom surface of the pad within each of the plurality of channels so that the solution can flow therethrough and into each of the plurality of channels when the physical contact exists with the workpiece, wherein each of the plurality of channels further includes an edge channel portion adapted to allow the solution to flow therethrough and out of the channels when the physical contact exists with the workpiece, wherein the plurality of channels are arranged to allow a relatively greater amount of processing to occur on a center region of the workpiece than an edge region of the workpiece, and wherein each of the plurality of channels is parallel to each other, and each of the plurality of parallel channels has a greater width in a center portion of the pad corresponding to the center region of the workpiece.