Patent ID: 8767169
Filing Date: 2014-07-01
Classification: G03B,G03F

Abstract:
1. A lithographic apparatus comprising: a substrate table having an upper surface and a recess in the upper surface that is configured to receive and support a substrate; a fluid handling structure configured to contain immersion fluid in a space adjacent to the upper surface of the substrate table and/or a substrate located in the recess; a cover comprising a planar main body that, in use, extends around a substrate from the upper surface to a peripheral section of an upper major face of the substrate in order to cover a gap between an edge of the recess and an edge of the substrate; an immersion fluid film disruptor, configured to disrupt the formation of a film of immersion fluid between an edge of the cover and immersion fluid contained by the fluid handling structure during movement of the substrate table relative to the fluid handling structure, the immersion fluid film disruptor comprising a structure in or on a surface of the fluid handling structure opposite the upper major surface of the substrate and/or the upper surface of the substrate table, to form a plurality of discrete gas jets; and a controller, configured to control supply of gas to the structure such that the jets of gas are provided when at least part of the structure is in the region of the cover and the lets of gas are not provided when the at least part of the structure is not in the region of the cover.