Abstract:
A lithographic apparatus (300) includes: a base frame (50); an illumination system (310) configured to condition a radiation beam and supported by the base frame; a support (320) constructed to support a patterning device (350), the patterning device being capable of imparting the radiation beam with a pattern in its cross- section to form a patterned radiation beam; a substrate table (100.2, 100.3) constructed to hold a substrate (110); a projection system (340) configured to project the patterned radiation beam onto a target portion of the substrate; a positioning device (100) configured to position the substrate table, the positioning device being supported by the base frame; a sensor (395) configured to sense a vibration caused by a torque exerted on the base frame and, an actuator configured to exert a force on the illumination system or the base frame, in response to the sensed vibration, in order to at least partly dampen the vibration.