Patent ID: 7655316

Claim:
A cleaning wafer to clean process residues from a support surface used in the processing of a substrate in an energized gas, the cleaning wafer comprising: a disc comprising (i) a supporting material comprising aluminum oxide, quartz, silicon wafer, polycarbonate, aluminum, aluminum alloy, stainless steel, or titanium; and (ii) a polymer layer supported by the supporting material, the polymer layer having: (a) a thickness of less than about 50 microns, (b) a resistivity of from about 10 6 to about 10 12 Ohms·cm, (c) a cleaning surface, and (d) a metal layer at least partially embedded in, or on the surface of, the polymer layer, and whereby pressing the cleaning surface of the cleaning wafer against the support surface causes the process residues on the support surface to adhere to the cleaning surface of the cleaning wafer such that the process residues are lifted off and cleaned from the support surface upon removal of the cleaning wafer therefrom.