Substrate distortion measurement
First Claim
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1. A distortion measurement apparatus comprising:
- a patterning device arranged to provide a patterned beam of radiation;
a projection system arranged to receive the patterned beam of radiation from the patterning device and to project the beam of radiation onto the substrate;
a detector arranged to measure physical distortion of a shape of a substrate;
a first processor programmed to receive distortion data indicating the measured physical distortion of the shape of the substrate and to transform the distortion data into a frequency domain representation; and
a second processor programmed to receive data representative of a pattern to be provided on the patterning device, and to use the frequency domain distortion data to adjust the pattern to be provided on the patterning device.
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Abstract
A distortion measurement apparatus comprising a detector arranged to measure distortion of a substrate, and a processor arranged to receive distortion data indicating the measured distortion of the substrate and to transform the distortion data into a frequency domain representation. The distortion data may alternatively be transformed into an orthogonal polynomial or an orthonormal polynomial representation.
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Citations
18 Claims
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1. A distortion measurement apparatus comprising:
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a patterning device arranged to provide a patterned beam of radiation; a projection system arranged to receive the patterned beam of radiation from the patterning device and to project the beam of radiation onto the substrate; a detector arranged to measure physical distortion of a shape of a substrate; a first processor programmed to receive distortion data indicating the measured physical distortion of the shape of the substrate and to transform the distortion data into a frequency domain representation; and a second processor programmed to receive data representative of a pattern to be provided on the patterning device, and to use the frequency domain distortion data to adjust the pattern to be provided on the patterning device. - View Dependent Claims (2, 3, 4, 5, 15)
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6. A distortion measurement apparatus comprising:
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a patterning device arranged to provide a patterned beam of radiation; a projection system arranged to receive the patterned beam of radiation from the patterning device and to project the beam of radiation onto the substrate; a detector arranged to measure physical distortion of a shape of a substrate; a first processor programmed to receive distortion data indicating the measured physical distortion of the shape of the substrate and to transform the distortion data into an orthogonal polynomial representation; and a second processor programmed to receive data representative of a pattern to be provided on the patterning device, and to use the orthogonal polynomial distortion data to adjust the pattern to be provided on the patterning device. - View Dependent Claims (7, 8)
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9. A distortion measurement apparatus comprising:
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a patterning device arranged to provide a patterned beam of radiation; a projection system arranged to receive the patterned beam of radiation from the patterning device and to project the beam of radiation onto the substrate; a detector arranged to measure physical distortion of a shape of a substrate; and a first processor programmed to receive distortion data indicating the measured physical distortion of the shape of the substrate and to transform the distortion data into an orthonormal polynomial representation; and a second processor programmed to receive data representative of a pattern to be provided on the patterning device, and to use the orthonormal polynomial distortion data to adjust the pattern to be provided on the patterning device, to correct for the measured physical distortion of the shape of the substrate. - View Dependent Claims (10, 11)
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12. A method of measuring lithographic substrate physical distortion, the method comprising:
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measuring the physical distortion of a substrate with a detector; transforming the measured distortion data into a frequency domain representation; and receiving data representative of a pattern to be provided on a patterning device, using the frequency domain distortion data to adjust the pattern data to correct for the measured physical distortion of the shape of the substrate, then sending the adjusted pattern data to the patterning device, and using the patterning device to pattern a beam of radiation which is projected onto the substrate. - View Dependent Claims (16)
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13. A method of measuring lithographic substrate physical distortion, the method comprising:
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measuring the physical distortion of a shape of a substrate with a detector; transforming the measured distortion data into an orthogonal polynomial representation; and receiving data representative of a pattern to be provided on the patterning device, using the orthogonal polynomial distortion data to adjust the pattern data to correct for the measured physical distortion of the shape of the substrate, then sending the adjusted pattern data to a patterning device, and using the patterning device to pattern a beam of radiation which is projected onto the substrate. - View Dependent Claims (17)
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14. A method of measuring lithographic substrate physical distortion, the method comprising:
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measuring physical distortion of a shape of a substrate with a detector; transforming measured distortion data into an orthonormal polynomial representation; and receiving data representative of a pattern to be provided on the patterning device, using the orthonormal polynomial distortion data to adjust the pattern data to correct for the measured physical distortion of the shape of the substrate, then sending adjusted pattern data to the patterning device, and using the patterning device to pattern a beam of radiation which is projected onto the substrate. - View Dependent Claims (18)
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Specification