Patent ID: 7742149
Filing Date: 2010-06-22
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: an illumination system configured to condition a radiation beam; a patterning device support constructed to support a patterning device, the patterning device configured to impart the radiation beam with a pattern in its cross-section to form a patterned radiation beam; a substrate support constructed to hold a substrate; and a projection system configured to project the patterned radiation beam onto a target portion of the substrate; wherein at least one of the supports is supported by a stage system comprising: a stage, a plurality of electromagnetic actuators, the actuators arranged to act on the stage and being over-determined in an actuator degree of freedom, and a first and a second electric power supply, wherein, in use, a current provided by the first electric power supply is supplied to a first coil associated with a first actuator of the plurality of actuators and to a first coil associated with a second actuator of the plurality of actuators, and a current provided by the second electric power supply is supplied to a second coil associated with the first actuator of the plurality of actuators and to a second coil associated with the second actuator of the plurality of actuators such that a total power applied to the first and second coils of the first actuator by the first and the second electric power supply substantially corresponds to a total power applied to the first and second coils of the second actuator by the first and the second electric power supply.