Patent ID: 8294876
Filing Date: 2012-10-23
Classification: G03F

Abstract:
1. A lithographic projection apparatus comprising: a support structure that holds a patterning device, the patterning device patterning a beam of radiation according to a desired pattern; a substrate table on which a substrate is held; a projection system that projects the patterned beam onto a target portion of the substrate held by the substrate table; a liquid supply system that provides an immersion liquid, through which the beam is to be projected, in a space between the projection system and the substrate; a member; and a controller that moves the member so that the member opposes the projection system to keep the projection system in contact with the liquid when the substrate, at least while on the substrate table, comes out of contact with the liquid, wherein the liquid supply system comprises a liquid confinement structure having at least one inlet, with which the immersion liquid is supplied, and at least one outlet, with which the supplied immersion liquid is removed,