Patent ID: 7834977
Filing Date: 2010-11-16
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: a substrate table configured to hold a substrate; a projection system configured to project a patterned beam of radiation onto a target portion of the substrate; a first liquid supply system configured to at least partially fill a space between a final element of the projection system and the substrate table, with a first liquid; a measurement system configured to measure a location of each of a plurality of points on the substrate, the measurement system being arranged such that measurements take place through a second liquid provided by a second liquid supply system, the second liquid supply system separate from the first liquid supply system and configured to at least partially fill a space between a final element of the measurement system and the substrate table with the second liquid; wherein at least one of the supply systems is movable along a direction substantially parallel to an optical axis of the corresponding projection system or measurement system.