Lithographic apparatus and device manufacturing method
First Claim
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1. A lithographic projection apparatus comprising:
- a support structure configured to hold a patterning device, the patterning device configured to pattern a beam of radiation according to a desired pattern;
a substrate table configured to hold a substrate;
a projection system configured to project the patterned beam onto a target portion of the substrate; and
a liquid supply system configured to at least partly fill a space between said projection system and said substrate, with a liquid through which said beam is to be projected, said liquid supply system comprising;
a liquid confinement structure extending along at least a part of the boundary of said space between said projection system and said substrate table, and a gas seal between said structure and the surface of said substrate.
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Abstract
In a lithographic projection apparatus, a structure surrounds a space between the projection system and a substrate table of the lithographic projection apparatus. A gas seal is formed between said structure and the surface of said substrate to contain liquid in the space.
1483 Citations
45 Claims
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1. A lithographic projection apparatus comprising:
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a support structure configured to hold a patterning device, the patterning device configured to pattern a beam of radiation according to a desired pattern;
a substrate table configured to hold a substrate;
a projection system configured to project the patterned beam onto a target portion of the substrate; and
a liquid supply system configured to at least partly fill a space between said projection system and said substrate, with a liquid through which said beam is to be projected, said liquid supply system comprising;
a liquid confinement structure extending along at least a part of the boundary of said space between said projection system and said substrate table, and a gas seal between said structure and the surface of said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A lithographic projection apparatus comprising:
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a support structure configured to hold a patterning device, the patterning device configured to pattern a beam of radiation according to a desired pattern;
a substrate table configured to hold a substrate;
a projection system configured to project the patterned beam onto a target portion of the substrate; and
a liquid supply system configured to at least partly fill a space between said projection system and said substrate with a liquid, wherein said space is in liquid connection with a liquid reservoir through a duct, and the minimum cross sectional area of said duct in a plane perpendicular to the direction of fluid flow is at least where Δ
V is the volume of liquid which has to be removed from said space within time tmin, L is the length of the duct, η
is viscosity of liquid in said space and Δ
Pmax is the maximum allowable pressure on an element of said projection system. - View Dependent Claims (35)
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36. A lithographic projection apparatus comprising:
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a support structure configured to hold a patterning device, the patterning device configured to pattern a beam of radiation according to a desired pattern;
a substrate table configured to hold a substrate;
a projection system configured to project the patterned beam onto a target portion of the substrate;
a liquid supply system configured to at least partly fill a space between said projection system and said substrate with a liquid, said liquid supply system comprising on a top surface of liquid in said liquid supply system, a wave suppression device configured to suppress development of waves. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A lithographic projection apparatus comprising:
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a support structure configured to hold a patterning device and movable in a scanning direction, the patterning device configured to pattern a beam of radiation according to a desired pattern;
a substrate table configured to hold a substrate and movable in a scanning direction;
a projection system configured to project the patterned beam onto a target portion of the substrate using a scanning exposure; and
a liquid supply system configured provide a liquid, through which said beam is to be projected, to a space between said projection system and said substrate, said liquid supply system comprising;
a liquid confinement structure extending along at least a part of the boundary of said space between said projection system and said substrate table, a gas inlet formed in a face of said structure that opposes said substrate to supply gas, a gas outlet formed in a face of said structure that opposes said substrate to extract gas, an inlet to supply said liquid to said substrate, and an outlet to remove said liquid after said liquid has passed under said projection system. - View Dependent Claims (43, 44, 45)
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Specification