In this paper we report for the first time on the development and performance of commercially available large area
photomask repair tools of the MRT series. MRT+1500 / MRT+2000 are advanced laser-based tools specifically designed
to repair high quality FPD (LCD & PDP) binary photomasks of Generations 6, 7, and beyond. MRT+2000 is the world's
first commercial tool capable of handling and repairing Gen 7 photomasks with sizes up to two meters. Another unique
feature of these tools is that they use a single DUV femtosecond laser to repair both opaque and clear defects with submicron
laser spot size while a proprietary gantry motion system supports nanometer-scale accuracy and stability for edge
lock. Key tool specifications, system architecture, design parameters, and laser processing specifics are discussed.
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