Patent ID: 9477158
Filing Date: 2016-10-25
CPC Classification: G03F

Claim Text:
1. A lithographic apparatus, comprising: a projection system configured to project a patterned beam of radiation into an image field, the image field having a center; a substrate table constructed to position a target portion of a substrate in the image field; a liquid supply system constructed to supply a space between the projection system and the substrate table with liquid; and a barrier member configured to extend along at least part of the space between the projection system and the substrate, the barrier member comprising a first external surface extending generally horizontally and a second external surface extending at an angle to horizontal, and the barrier member comprising a liquid extraction system, comprising: a passage configured to be subjected to a suction from a suction source, and a plurality of conduits directly fluidly connected in parallel between the passage and respective openings of the conduits to remove liquid from the space, the openings of the conduits arranged in the first external surface or in the second external surface of the barrier member and the openings arranged in the respective surface at different distances from the center of the image field.