Patent ID: 7224429
Filing Date: 2007-05-29
Classification: G03F,H02K,H02N

Abstract:
1. A lithographic apparatus comprising: an illumination system configured to condition a beam of radiation; a support structure configured to support a patterning device, the patterning device serving to impart the beam of radiation with a pattern in its cross-section; a substrate table configured to hold a substrate; a projection system configured to project the patterned beam onto a target portion of the substrate, and a first and a second electromagnetic actuator, each of said first and second electromagnetic actuator comprising two electromagnetic elements that are configured to electromagnetically cooperate to move a first of the two electromagnetic elements with respect to a second of the two electromagnetic elements, wherein the first actuator comprises a movable shield that is configured to shield said first actuator from an electromagnetic field generated by the second actuator or generated by another magnetic part of the apparatus so as to at least partly inhibit a disturbance force due to said electromagnetic field from acting on said first actuator.