Measurement apparatus and method
First Claim
1. A measurement apparatus comprising:
- a radiation source configured to provide a measurement beam of radiation such that an individually controllable element of an array of individually controllable elements capable of modulating a beam of radiation, is illuminated by the measurement beam and redirects the measurement beam; and
a detector arranged to receive the redirected measurement beam and determine the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element.
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Accused Products
Abstract
A measurement apparatus disclosed that has a radiation source configured to provide a measurement beam of radiation such that an individually controllable element of an array of individually controllable elements capable of modulating a beam of radiation, is illuminated by the measurement beam and redirects the measurement beam, and a detector arranged to receive the redirected measurement beam and determine the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element.
68 Citations
32 Claims
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1. A measurement apparatus comprising:
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a radiation source configured to provide a measurement beam of radiation such that an individually controllable element of an array of individually controllable elements capable of modulating a beam of radiation, is illuminated by the measurement beam and redirects the measurement beam; and a detector arranged to receive the redirected measurement beam and determine the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A lithographic apparatus, comprising:
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an illumination system arranged to provide an illumination beam of radiation; a measurement apparatus comprising; a radiation source configured to provide a measurement beam of radiation such that an individually controllable element of an array of individually controllable elements capable of modulating a beam of radiation, is illuminated by the measurement beam and redirects the measurement beam, and a detector arranged to receive the redirected measurement beam and determine the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element. a support structure configured to hold a patterning device, the patterning device arranged to impart the illumination beam with a pattern in its cross-section; and a projection system arranged to project the patterned beam of radiation onto a target portion of a substrate. - View Dependent Claims (15, 16)
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17. A measurement method comprising:
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illuminating, with a measurement beam of radiation, an individually controllable element of an array of individually controllable elements, the array being capable of modulating a beam of radiation, the illuminating being such that the individually controllable element redirects the measurement beam of radiation; receiving the redirected measurement beam at a detector; and determining the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A device manufacturing method, comprising:
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providing an illumination beam of radiation using an illumination system; illuminating, with a measurement beam of radiation, an individually controllable element of an array of individually controllable elements, the array being capable of modulating a beam of radiation, the illuminating being such that the individually controllable element redirects the measurement beam of radiation; receiving the redirected measurement beam at a detector; determining the position at which the redirected measurement beam is incident upon the detector, the position at which the redirected measurement beam is incident upon the detector being indicative of a characteristic of the individually controllable element; using a patterning device to impart the illumination beam with a pattern in its cross-section; and projecting the patterned beam of radiation onto a target portion of a substrate. - View Dependent Claims (31, 32)
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Specification