Lithographic apparatus and device manufacturing method using interferometric and maskless exposure units
First Claim
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1. A lithographic system for exposing a pattern on a substrate, comprising:
- an interference exposure unit that projects two beams of radiation onto at least a portion of the substrate, such that the two beams of radiation interfere to expose a plurality of lines; and
a lithography unit that modulates a beam of radiation using an array of individually controllable elements and projects the modulated beam onto at least a portion of the substrate;
wherein the interference exposure unit and the lithography unit are configured such that a pitch of the lines exposed by the interference exposure unit, in a direction perpendicular to a length of the lines, is an integer multiple of a width, in a direction of the exposure on the substrate by the lithography unit, corresponding to a single individually controllable element.
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Abstract
A lithographic system combining an interference exposure unit and a lithography unit. The lithography unit can comprise an array of individually controllable elements. The lithography system can be arranged such that a pitch of the lines exposed by the interference exposure unit is an integer multiple of a size of an exposure area of the lithography unit corresponding to a single individually controllable element.
76 Citations
20 Claims
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1. A lithographic system for exposing a pattern on a substrate, comprising:
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an interference exposure unit that projects two beams of radiation onto at least a portion of the substrate, such that the two beams of radiation interfere to expose a plurality of lines; and a lithography unit that modulates a beam of radiation using an array of individually controllable elements and projects the modulated beam onto at least a portion of the substrate; wherein the interference exposure unit and the lithography unit are configured such that a pitch of the lines exposed by the interference exposure unit, in a direction perpendicular to a length of the lines, is an integer multiple of a width, in a direction of the exposure on the substrate by the lithography unit, corresponding to a single individually controllable element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A device manufacturing method, comprising:
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projecting two beams of radiation onto at least a portion of a substrate, such that the two beams of radiation interfere to expose a plurality of lines; and modulating a beam of radiation using an array of individually controllable elements; and projecting the modulated beam of radiation onto at least the portion of the substrate, wherein a pitch of the exposed plurality of lines, in a direction perpendicular to a length of the lines, is an integer multiple of a width, in the direction of an exposure on the substrate by the modulated beam, corresponding to a single individually controllable element. - View Dependent Claims (19, 20)
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Specification