Lithographic apparatus and device manufacturing method
First Claim
1. A lithographic apparatus, comprising:
- an illumination system that supplies a beam of radiation;
an array of individually controllable elements that pattern the beam; and
a projection system that projects the patterned beam onto a target portion of a substrate, the projection system includes an array of lenses including,a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, anda second parallel array of cylindrical lenses, which receive at respective lenses respective portions of the patterned beam from the first parallel array of cylindrical lenses and which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, and project the patterned beam onto the target portion of the substrate,wherein the array of lenses receive the patterned beam, divide the patterned beam into a plurality of substantially polygonal portions, and focus each substantially polygonal portion to form a respective beam spot on the target portion of the substrate.
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Accused Products
Abstract
A lithographic apparatus includes an illumination system that supplies a beam of radiation, an array of individually controllable elements that pattern the beam, a substrate table for supporting a substrate, and a projection system that projects the patterned beam onto a target portion of the substrate. The projection system comprises an array of lenses arranged to receive the patterned beam, divide the patterned beam into a plurality of substantially polygonal portions, and focus each substantially polygonal portion to form a respective radiation spot on the target portion of the substrate. In one example, the illumination system comprises an illuminator arranged to receive a beam of radiation from a radiation source, the illuminator comprising an array of lenses arranged to divide the beam of radiation from the source into a plurality of substantially polygonal portions and to focus each substantially polygonal portion onto a respective one of the array of individually controllable elements.
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Citations
19 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 individually controllable elements that pattern the beam; and a projection system that projects the patterned beam onto a target portion of a substrate, the projection system includes an array of lenses including, a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, and a second parallel array of cylindrical lenses, which receive at respective lenses respective portions of the patterned beam from the first parallel array of cylindrical lenses and which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, and project the patterned beam onto the target portion of the substrate, wherein the array of lenses receive the patterned beam, divide the patterned beam into a plurality of substantially polygonal portions, and focus each substantially polygonal portion to form a respective beam spot on the target portion of the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A lithographic apparatus, comprising:
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an illuminator that receives a beam of radiation from a radiation source; an array of lenses that includes, a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, and a second parallel array of cylindrical lenses, which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, wherein the array of lenses is configured to receive the beam from the illuminator, divide the beam into a plurality of substantially polygonal portions, and focus each substantially polygonal portion onto a respective one of an array of individually controllable elements to pattern the polygonal portions; and a projection system that projects the patterned beams onto a target portion of a substrate.
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18. A device manufacturing method, comprising:
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(a) patterning a beam of radiation with an array of individually controllable elements; (b) using a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, to divide the patterned beam into a plurality of substantially polygonal portions; and (c) using a second parallel array of cylindrical lenses, which receive at respective lenses respective portions of the patterned beam from the first parallel array of cylindrical lenses and which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, to focus the substantially polygonal portions to form respective beam spots on the target portion of the substrate.
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19. A device manufacturing method comprising the steps of:
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(a) using a first parallel array of cylindrical lenses, which extend across the patterned beam in a first direction, to divide a beam received from a radiation source into a plurality of substantially polygonal portions; (b) using a second parallel array of cylindrical lenses, which extend across the patterned beam in a second direction, the second direction being substantially perpendicular to the first direction, to focus the substantially polygonal portions onto respective individually controllable element in an array of individually controllable elements; (c) patterning the focused beams with the respective individually controllable elements in the array of individually controllable elements; and (d) projecting the patterned beam onto a target portion of a substrate.
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Specification