Lithographic apparatus and device manufacturing method
First Claim
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1. A substrate holding apparatus which contacts an undersurface of a substrate and holds the substrate, at least a portion of a top surface of the substrate being immersed, in use, in liquid, said apparatus comprising:
- a table to attract the substrate; and
a preventing system to prevent the liquid from reaching the undersurface of the substrate, wherein the preventing system is configured to not extend above the top surface of the substrate.
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Abstract
A lithographic projection apparatus is disclosed in which a space between the projection system and the substrate is filled with a liquid. An edge seal member at least partly surrounds the substrate or other object on a substrate table to prevent liquid loss when edge portions of the substrate or other object are, for example, imaged or illuminated.
224 Citations
15 Claims
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1. A substrate holding apparatus which contacts an undersurface of a substrate and holds the substrate, at least a portion of a top surface of the substrate being immersed, in use, in liquid, said apparatus comprising:
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a table to attract the substrate; and a preventing system to prevent the liquid from reaching the undersurface of the substrate, wherein the preventing system is configured to not extend above the top surface of the substrate. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An exposure apparatus, comprising:
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a projection optical system for projecting a pattern of an original onto a substrate; a liquid application device for applying liquid to the substrate; a table for securing the substrate; and a liquid prevention device for preventing liquid from contacting an undersurface of the substrate, wherein the liquid prevention device is configured to be below the top surface of the substrate.
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8. A method of manufacturing a device, comprising the steps of:
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providing a projecting optical system for projecting a pattern of an original onto a substrate; securing the substrate with a table; applying a liquid to the substrate; and preventing liquid from contacting an undersurface of the substrate using a liquid prevention device that does not extend above the top surface of the substrate.
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9. A substrate holding apparatus for securing an underside of a substrate, with at least a portion of a top surface of the substrate being immersed, in use, in liquid, said apparatus comprising:
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a table to secure the substrate from the underside; and a liquid sealing device for sealing the underside of the substrate from exposure to the liquid, wherein the liquid sealing device is configured to be below the top surface of the substrate. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification