Lithographic apparatus and device manufacturing method
First Claim
Patent Images
1. A lithographic apparatus, comprising:
- an illumination system that supplies a beam of radiation;
an array of cylindrical lenses arranged so that their elongated axes are parallel and so that each cylindrical lens of the array of cylindrical lenses receives a respective portion of the beam perpendicular to its elongated axis, the array of cylindrical lenses dividing the beam of radiation into a plurality of sub-beams of radiation;
an array of individually controllable elements being configured such that the plurality of sub-beams of radiation are directed onto corresponding individually controllable elements in said array of individually controllable elements to pattern the plurality of sub-beams of radiation; and
a projection system that projects the patterned plurality of sub-beams of radiation onto a target portion of a substrate.
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Accused Products
Abstract
Use of a refraction grating to divide a beam of radiation into a plurality of sub-beams that are each directed onto an array of individually controllable elements, modulated thereby and projected onto a substrate as an array of spots.
26 Citations
17 Claims
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1. A lithographic apparatus, comprising:
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an illumination system that supplies a beam of radiation; an array of cylindrical lenses arranged so that their elongated axes are parallel and so that each cylindrical lens of the array of cylindrical lenses receives a respective portion of the beam perpendicular to its elongated axis, the array of cylindrical lenses dividing the beam of radiation into a plurality of sub-beams of radiation; an array of individually controllable elements being configured such that the plurality of sub-beams of radiation are directed onto corresponding individually controllable elements in said array of individually controllable elements to pattern the plurality of sub-beams of radiation; and a projection system that projects the patterned plurality of sub-beams of radiation onto a target portion of a substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 17)
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12. A device manufacturing method, comprising:
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(a) providing a beam of radiation perpendicular to respective elongated axes of an array of cylindrical lenses; (b) dividing the beam of radiation into a plurality of sub-beams using the array of cylindrical lenses; (c) patterning each one of the plurality of said sub-beams using selected individually controllable elements in an array of individually controllable elements; (d) projecting the patterned sub-beams of radiation onto a target portion of a substrate. - View Dependent Claims (13, 14)
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Specification