Abstract:
A fluid supply system for a lithographic apparatus includes a first fluid flow path for fluid between a fluid source and a first component and a drain fluid flow path for fluid flow from a junction in the first fluid flow path to a drain component. A controller is provided to vary a fluid flow rate to the first component from the fluid source by regulating flow of fluid through the drain fluid flow path.
Abstract:
A porous member is used in a liquid removal system of an immersion lithographic projection apparatus to smooth uneven flows. A pressure differential across the porous member may be maintained at below the bubble point of the porous member so that a single-phase liquid flow is obtained. Alternatively, the porous member may be used to reduce unevenness in a two-phase flow.
Abstract:
A lithographic apparatus having a fluid handling structure configured to contain immersion fluid in a space adjacent to an upper surface of a substrate table and/or a substrate located in a recess of the substrate table, a cover including 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, and 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.
Abstract:
A protrusion is provided on a barrier member which at least partly confines a liquid between a projection system and a substrate. The protrusion is closer to the projection system than other parts of the barrier member to promote a meniscus of liquid to adhere between the protrusion and the projection system.
Abstract:
An immersion lithographic apparatus is disclosed that has a fluid handling system configured to provide immersion liquid between a final element of a projection system and a surface which comprises, in cross-section, a feature, and an adjustment fluid source configured to locally change the composition of the immersion liquid to cause a local decrease in surface tension of the immersion liquid at least when a meniscus of the immersion liquid contacts the feature.
Abstract:
A lithographic apparatus, including a substrate table configured to hold a substrate; a positioner configured to position the substrate table relative to a projection system, the positioner including a short stroke module configured to perform fine positioning movements, on which the substrate table is held and which is supported on a long stroke module configured to perform coarse positioning movements; and a coverplate configured to at least partly cover a top surface of the short stroke module; wherein the coverplate is mounted to the long stroke module.
Abstract:
A gas knife configured to dry a surface in an immersion lithographic apparatus is optimized to remove liquid by ensuring that a pressure gradient is built up in the liquid film on the surface being dried.
Abstract:
A barrier member is provided for use in immersion lithography. The barrier member includes an extractor assembly on a bottom surface configured to face the substrate. The extractor assembly includes a plate configured to split the space between a liquid removal device and the substrate in two such that a meniscus is formed in an upper channel between the liquid removal device and the plate and below the plate between the plate and the substrate.
Abstract:
A lithographic apparatus is described having a liquid supply system configured to at least partly fill a space between a projection system of the lithographic apparatus and a substrate with liquid, a barrier member arranged to substantially contain the liquid within the space, and one or more elements to control and/or compensate for evaporation of liquid from the substrate.