Invention Grant
US07936443B2 Lithographic apparatus and device manufacturing method 有权
平版印刷设备和器件制造方法

Lithographic apparatus and device manufacturing method
Abstract:
Data from the piezo-electric sensors in the mounts for the projection system can be used in the control loops for other parts of the lithographic apparatus, for example the mask table, the substrate table or the air mounts for the frame bearing the projection system. Information from, for example, a geophone, which is used to measure the absolute velocity of the frame bearing the projection system, can be used in the control loop for the piezo-electric actuator in the mount for the projection system.
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