Patent ID: 8462312

Claim:
An apparatus for use in a lithographic apparatus to project a patterned beam of radiation onto a substrate, the apparatus comprising: a liquid supply system configured to supply a liquid to a space between a projection system of the lithographic apparatus and the substrate; a first table connected to a positioning system configured to displace the first table into and out of a path of the patterned beam of radiation, the first table configured to hold a substrate; and a second table connected to the positioning system, the positioning system configured to position the second table into the path of the patterned beam of radiation when the first table is displaced out of the path of the patterned beam of radiation, the second table not configured to hold a substrate and movable with respect to the first table by the positioning system, wherein the second table provides a surface to at least partly bound the space to contain liquid in the space when the first table is displaced out of the path of the patterned beam of radiation, and wherein the second table has mounted thereon a cleaning device configured to clean the projection system of the lithographic apparatus.