Patent ID: 8634059
Filing Date: 2014-01-21
Classification: G03F

Abstract:
1. A lithographic apparatus, comprising: a projection system configured to project an image of a desired pattern through a liquid onto an image field; a substrate table configured to hold a substrate so that a target portion on the substrate is positionable in the image field; a barrier member configured to surround, and to at least partly confine liquid to, a space between the projection system and an immersion surface, the immersion surface being that of the substrate, the substrate table, or both the substrate and the substrate table, the barrier member comprising: a surface facing the immersion surface so as to define a gap between the barrier member and the immersion surface; an extraction outlet, having a sieve, to extract fluid from the gap, the sieve having a surface closest to the immersion surface farther from the immersion surface than another surface of the barrier member; a plate located between the extraction outlet and the image field and extending around the image field; and an inlet, located above the plate and between the plate and the projection system, for connection to a source of liquid, the inlet configured to supply liquid to the space in the form of a plurality of jets and in a direction toward the image field.