Lithographic apparatus and device manufacturing method
First Claim
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1. A lithographic apparatus, comprising:
- an illumination system that supplies a projection beam of radiation;
patterning means for imparting the projection beam with a pattern in its cross-section;
second patterning means for imparting a second beam of radiation supplied by the illumination system with a second pattern;
a substrate table that supports a substrate;
a projection system that projects the patterned beams onto a target portion of the substrate; and
a radiation distribution device that distributes the radiation from the illumination system to the patterning means;
wherein the radiation distribution device has a duty cycle during which it sequentially directs substantially all of the radiation from the illumination system to each of a plurality of radiation distribution channels in turn, and wherein the radiation distribution channels provide the beams of radiation to the patterning means.
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Abstract
Provided is a radiation distribution system for distributing the radiation from an illumination system to two or more patterning means, each for patterning beams of radiation, which are subsequently projected onto a substrate.
33 Citations
24 Claims
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1. A lithographic apparatus, comprising:
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an illumination system that supplies a projection beam of radiation;
patterning means for imparting the projection beam with a pattern in its cross-section;
second patterning means for imparting a second beam of radiation supplied by the illumination system with a second pattern;
a substrate table that supports a substrate;
a projection system that projects the patterned beams onto a target portion of the substrate; and
a radiation distribution device that distributes the radiation from the illumination system to the patterning means;
wherein the radiation distribution device has a duty cycle during which it sequentially directs substantially all of the radiation from the illumination system to each of a plurality of radiation distribution channels in turn, and wherein the radiation distribution channels provide the beams of radiation to the patterning means.
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1-1. (canceled)
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2. A system, comprising:
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an illuminator configured to produce a beam of radiation;
a radiation distribution device configured to receive the beam of radiation and produce at least first and second beams therefrom, the radiation distribution device configured to sequentially direct the beams of radiation from the illuminator to corresponding distribution paths to form the at least first and second beams;
a first patterning device configured to pattern the first beam with a first pattern;
a second patterning device configured to pattern the second beam with a second pattern; and
a projection system configured to project the first and second patterned beams onto a target portion of a substrate. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lithographic apparatus, comprising:
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an illumination system configured to supply first and second beams of radiation;
a first patterning device configured to pattern the first beam of radiation with a first pattern;
a second patterning device configured to pattern the second beam of radiation with a second pattern;
a projection system that projects the patterned beams onto a target portion of the substrate; and
a radiation distribution device that distributes the radiation from the illumination system to the first and second patterning devices, wherein the radiation distribution device includes an optical device that divides the beam of radiation from the illumination system into the first and second beams, each of which is directed to a distribution path, and wherein the radiation distribution paths provide the first and second beams of radiation to respective ones of the first and second patterning devices and the optical device comprises a plurality of partially reflective surfaces through which the first and second beams of radiation from the illumination system are successively directed in accordance with a distribution device duty cycle, each partially reflective surface associated with one of the radiation distribution paths and reflecting a portion of the first and second beams of radiation to the radiation distribution path. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A device manufacturing method, comprising:
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pattering a first beam of radiation with a first pattern;
patterning a second beam of radiation with a second pattern;
projecting the first and second patterned beams onto a target portion of a substrate; and
using a radiation distribution device to distribute the radiation from the illumination system to the first and second patterning devices, wherein the radiation distribution device has a duty cycle during which it sequentially directs substantially all of the radiation from the illumination system to each of a plurality of radiation distribution paths in turn, wherein the radiation distribution paths provide the beams of radiation to respective ones of the first and second patterning devices.
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Specification