Patent ID: 9188880
Filing Date: 2015-11-17
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: a projection system configured to project a patterned radiation beam onto a target portion of a substrate; a table configured to support the substrate and configured to move relative to the projection system and a liquid confinement member; a liquid supply system configured to at least partly fill a space between the projection system and the substrate with liquid, the liquid supply system comprising the liquid confinement member extending at least partly between the table and an optical element, closest to the table, of the projection system, the liquid confinement member configured to substantially confine the liquid to a cross-sectional area on the substrate smaller than the area of the pattern receiving surface of the substrate; a table displacement system, arranged to move the table along a predetermined path relative to the liquid confinement member; a plurality of heaters each configured to locally heat a corresponding part of the table, of the substrate, or of both the table and the substrate; a heater control system configured to provide a control signal to each respective one or more heaters of the plurality of heaters to control heating of the corresponding part of the table, of the substrate, or of both the table and the substrate; and a thermally-induced distortion control system configured to determine a thermally-induced distortion profile of the substrate and configured to adjust a lithographic apparatus parameter, that is other than, or in addition to, the control signal and a temperature of the liquid as being supplied to the space by the liquid supply system, based on the thermally-induced distortion profile of the substrate.