Patent ID: 8941815
Filing Date: 2015-01-27
Classification: G03F

Abstract:
1. A substrate table for a lithographic apparatus, the substrate table comprising: a substrate table part having a substantially planar upper surface in which there is a recess that is configured to receive a substrate, the recess having a cross-sectional width; a cover, configured such that, in use, it extends around the substrate from the upper surface of the substrate table part to a peripheral section of an upper major face of the substrate in order to cover a gap between an edge of the recess and an edge of the substrate and such that it defines an open central section of the cover, wherein the cover has a cross-sectional width larger than the cross-sectional width of the recess; and an actuator system, in or on the substrate table, configured to move the cover between a closed position, in which the cover is in contact with the upper surface of a substrate supported in the recess and in contact with and on top of the upper surface of the substrate table part and the open central section is smaller than the upper surface of the substrate, and an open position, in which the cover is displaced vertically from and above a substrate in the recess and displaced vertically from and above the upper surface of the substrate table part, wherein the actuator system is configured such that, in moving the cover to the open position, at least part of the actuator system moves between the substrate supported in the recess and at least part of the upper surface of the substrate table part and the actuator system enlarges the open central section of the cover sufficiently for the substrate to be able to pass through the open central section of the cover.