Patent ID: 11898601
Assignee: ASML NETHERLANDS B.V.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G  H | IPC F  G  H

Claim 0:
1. A support table for a lithographic apparatus, the support table configured to support a substrate, wherein the support table comprises:
a base surface facing a surface of the substrate when the substrate is supported by the support table;
a plurality of burls protruding from the base surface, each of the plurality of burls having a respective distal end, the plurality of burls arranged such that, when the substrate is supported by the support table, the substrate is supported by the respective distal ends of the plurality of burls; and
one or more gas cushion members at at least one distal end of the plurality of the burls, each gas cushion members comprising:
a recess shaped and configured such that a moving of the substrate into a position on the support table at which the substrate is supported by the support table causes a localised build-up of pressure within the recess, the localised build-up of pressure providing a localised gas cushioning effect during the moving of the substrate, and
a gas channel configured to open into a portion of the recess, the gas channel configured to allow a gas flow out of the recess, while the substrate is being moved onto the support table, to provide an adjustment of the localised gas cushioning effect provided by the recess.