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;
a projection system that projects the patterned beam onto a target plane;
a substrate table that supports a substrate, such that a target surface of the substrate is substantially coincident with the target plane;
a sensor system that detects an intensity distribution of a radiation pattern in the patterned beam and that provides an intensity signal indicative of the detected intensity distribution;
a positioning system that adjusts the radiation pattern by adjusting at least one of a position and an orientation of at least one of the array of individually controllable elements, a component of the projection system, and the illumination system; and
a control system that controls the array of individually controllable elements such that they pattern the beam, that directs the radiation pattern on to the sensor system to receive said intensity signal, and that provides a control signal to control the positioning system according to the detected intensity distribution to adjust the radiation pattern, wherein the projection system comprises at least one component, the at least one component including an array of lenses arranged to receive the patterned beam, wherein each lens of the array of lenses receives and focuses a respective portion of the patterned beam, and wherein the array of lenses projects a corresponding radiation pattern onto the target plane.
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Accused Products
Abstract
A system and method for use in a lithographic environment include an illumination system for supplying a projection beam of radiation, an array of individually controllable elements for patterning the beam, a projection system for projecting the patterned beam onto a target plane, and a substrate table for supporting a substrate such that a target surface of the substrate is coincident with the target plane. The projection system comprises at least one component, including at least an array of lenses arranged so that each lens receives and focuses a respective portion of the patterned beam. The array of lenses projects a radiation pattern onto the target plane. The apparatus also includes a sensor system arranged to detect an intensity distribution of the projected radiation pattern and to provide a corresponding intensity signal, and a positioning system controllable to adjust a position and/or an orientation of at least one of the following: the array of elements; a component of the projection system; and the illumination system. The apparatus also includes a control system which controls the array of elements to pattern the beam, and which also to receives the intensity signal and controls the positioning system according to the detected intensity distribution to adjust the projected radiation pattern, for example to align the patterned beam with the lens array.
88 Citations
42 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;
a projection system that projects the patterned beam onto a target plane;
a substrate table that supports a substrate, such that a target surface of the substrate is substantially coincident with the target plane;
a sensor system that detects an intensity distribution of a radiation pattern in the patterned beam and that provides an intensity signal indicative of the detected intensity distribution;
a positioning system that adjusts the radiation pattern by adjusting at least one of a position and an orientation of at least one of the array of individually controllable elements, a component of the projection system, and the illumination system; and
a control system that controls the array of individually controllable elements such that they pattern the beam, that directs the radiation pattern on to the sensor system to receive said intensity signal, and that provides a control signal to control the positioning system according to the detected intensity distribution to adjust the radiation pattern, wherein the projection system comprises at least one component, the at least one component including an array of lenses arranged to receive the patterned beam, wherein each lens of the array of lenses receives and focuses a respective portion of the patterned beam, and wherein the array of lenses projects a corresponding radiation pattern onto the target plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A device manufacturing method, comprising:
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(a) patterning a beam of radiation using an array of individually controllable elements;
(b) projecting the patterned beam onto a target plane using a projection system that includes at least one component;
(c) receiving the patterned beam on the at least one component, such that each lens of an array of lenses receives and focuses a respective portion of the patterned beam;
(d) projecting a corresponding radiation pattern onto the target plane using the array of lenses;
(e) detecting an intensity distribution of the projected radiation pattern at the target plane;
(f) adjusting at least one of a position and an orientation of at least one of the array of controllable elements, a component of the projection system, and the illumination system according to the detected intensity distribution to adjust the projected radiation pattern;
(g) providing and supporting a substrate, such that a target surface of the substrate is substantially coincident with the target plane; and
(h) projecting the beam having said pattern onto a target portion of the target surface of the substrate. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification