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iv Dowquently irradiated with hard X-rays from a synchrotron source. A mask is used to direct a pattern of X-radiation onto the PMMA sur-face. As a result of the incident ionizing radiation, the PMMA under-goes chain scission reactions that result in a substantial decrease in the polymer molecular mass, as well as formation of a variety of gaseous small molecules (CO2, CH4, CH3OH, etc.).5 The reduction in molecular mass of the PMMA in the exposed areas leads to its ready dissolution in certain developing solvents,1 which in turn leads to a microstructured PMMA template supported on the conducting sub-strate. Metals can then be deposited into the polymer template using standard electroplating methods. Removal of the PMMA template results in a metal molding tool that can be used in the fabrication of polymeric microstructures. In addition, the PMMA template itself can be used as a mold for mass production of metal microstructures