Patent ID: 8493553
Filing Date: 2013-07-23
Classification: G03B,G03F

Abstract:
1. A lithographic apparatus comprising: a support constructed to support a patterning device, the patterning device being capable of imparting a radiation beam with a pattern in its cross-section to form a patterned radiation beam; a substrate table constructed to hold a substrate; a projection system configured to project the patterned radiation beam onto a target portion of the substrate; a metrology frame supported by a vibration isolation support device; an object movable with respect to the metrology frame; a sensor configured to determine a position, or a speed, or an acceleration, or any combination of the foregoing, of the object with respect to the metrology frame, or the projection system or both the metrology frame and the projection system; an actuator configured to apply a correcting force on the metrology frame; and a controller configured to calculate the correcting force to be applied to the metrology frame based on a correlation between the determined position, speed and/or acceleration of the object, and the effects of gas pressure pulses exerted on the metrology frame as caused by the determined position, speed and/or acceleration of the object relative to the metrology frame.