Projection optical system and method
First Claim
1. A refractive projection optical system for imaging a first object into a region of a second object, the refractive projection optical system comprising:
- a plurality of lenses disposed along an imaging beam path of the refractive projection optical system,wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects,wherein the plurality of lenses is dividable into a plurality of non-overlapping groups of lenses, such that a total refractive power of each group of lenses is one of a negative refractive power or a positive refractive power,wherein a first group of lenses has a positive refractive power,wherein a second group of lenses has a positive refractive power and is disposed between the first group of lenses having the positive refractive power and the region of the second object, andwherein the intermediate image is formed in a region between the first group of lenses having the positive refractive power and the second group of lenses having the positive refractive power.
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Accused Products
Abstract
A refractive projection optical system for imaging a first object into a region of a second object comprises a plurality of lenses disposed along an imaging beam path of the projection optical system; wherein the projection optical system is configured to have a numerical aperture on a side of the second object of greater than 1 wherein the projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between, the first and second objects.
31 Citations
40 Claims
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1. A refractive projection optical system for imaging a first object into a region of a second object, the refractive projection optical system comprising:
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a plurality of lenses disposed along an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, wherein the plurality of lenses is dividable into a plurality of non-overlapping groups of lenses, such that a total refractive power of each group of lenses is one of a negative refractive power or a positive refractive power, wherein a first group of lenses has a positive refractive power, wherein a second group of lenses has a positive refractive power and is disposed between the first group of lenses having the positive refractive power and the region of the second object, and wherein the intermediate image is formed in a region between the first group of lenses having the positive refractive power and the second group of lenses having the positive refractive power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 28)
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13. A refractive projection optical system, for imaging a first object into a region of a second object, the refractive projection optical system comprising:
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a plurality of lenses disposed along an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, and wherein the projection optical system is configured to have a numerical aperture on a side of the second object of greater than 1. - View Dependent Claims (14)
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15. A refractive projection optical system, for imaging a first object into a region of a second object, the refractive projection optical system comprising:
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a plurality of lenses disposed along an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, and wherein an absolute value of a magnification of the imaging of the intermediate image into the region of the second object is less 0.5. - View Dependent Claims (16, 17)
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18. A refractive projection optical system for imaging a first object into a region of a second object, the refractive projection optical system comprising:
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a plurality of lenses disposed along an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, wherein the imaging of the first object into the intermediate image is such that at least one of the following conditions is fulfilled; an angle of at least one chief ray of the intermediate image is greater than 4°
;a longitudinal spherical aberration of the intermediate image is greater than 0.8 mm; an astigmatism value of the intermediate image is greater than 11.0 mm; an aberration of the intermediate image is greater than 1.5%; a RMS of a spot diameter on an optical axis of the projection optical system is greater than 0.5 mm; a RMS of a spot diameter at a field point farthest away from the optical axis of the projection optical system is greater than 5 mm; and a RMS deviation of a wavefront at the intermediate image is greater than 10λ
/NA, wherein λ
is a wavelength of imaging light and NA is a numerical aperture of the imaging at the intermediate image. - View Dependent Claims (19, 20)
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21. A refractive projection optical system for imaging a first object into a region of a second object, the refractive projection optical system comprising:
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a plurality of lenses disposed alone an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, wherein the imaging of the first object into the second image is such that at least one of the following conditions is fulfilled; an angle of at least one chief ray of the image is less than 1°
;a longitudinal spherical aberration of the image is less than 0.001 mm; an astigmatism value of the image is less than 100 nm; an aberration of the image is less than 0.001%; a RMS of a spot diameter on an optical axis of the projection optical system is less than 0.001 mm; a RMS of a spot diameter at a field point farthest away from the optical axis of the projection optical system is less than 0.002 mm; and a RMS deviation of a wave front is less than 0.1 times a diffraction limit. - View Dependent Claims (22, 23)
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24. A refractive projection optical system, for imaging a first object into a region of a second object, the refractive projection optical system composing:
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a plurality of lenses disposed along an imaging beam path of the refractive projection optical system, wherein the refractive projection optical system is configured to generate an intermediate image of the first object and to image the intermediate image into the region of the second object, wherein the intermediate image is formed in between the first and second objects, and wherein the intermediate image has a field curvature having a radius of curvature which is less than four times a free diameter of the intermediate image. - View Dependent Claims (25, 26, 27)
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29. A method of manufacturing a microstructured device, comprising:
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a first imaging of a patterning structure into an intermediate image of the patterning structure; and a second imaging of the intermediate image of the pattering structure into a region of a radiation sensitive substrate for exposing the radiation sensitive substrate, wherein the first imaging and the second imaging are performed by using a refractive projection optical system, and wherein the first imaging comprises; a first expanding of a cross section of an imaging beam downstream of the patterning structure; a first reducing of the cross section of the imaging beam downstream of the first expanding of the cross section; a second expanding of the cross section of the imaging beam downstream of the first reducing of the cross section; a second reducing of the cross section of the imaging beam downstream of the second expanding of the cross section; a third expanding of the cross section of the imaging beam downstream of the second reducing of the cross section; and a third reducing of the cross section of the imaging beam downstream of the third expanding of the cross section. - View Dependent Claims (30, 31, 32)
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33. A method of manufacturing a microstructured device, comprising:
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a first imaging of a patterning structure into an intermediate image of the patterning structure; and a second imaging of the intermediate image of the patterning structure into a region of a radiation sensitive substrate for exposing the radiation sensitive substrate, wherein the first imaging and the second imaging are performed by using a refractive projection optical system, and wherein the second imaging has a numerical aperture on a side of the radiation sensitive substrate of greater than 1. - View Dependent Claims (34)
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35. A method of manufacturing a microstructured device, comprising:
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a first imaging of a patterning structure into an intermediate image of the patterning structure; and a second imaging of the intermediate image of the patterning structure into a region of a radiation sensitive substrate for exposing the radiation sensitive substrate, wherein the first imaging and the second imaging are performed by using a refractive projection optical system, and wherein the first imaging is performed such that at least one of the following conditions is fulfilled; an angle of at least one chief ray of the intermediate image is greater than 4°
;a longitudinal spherical aberration of the intermediate image is greater than 0.8 mm; an astigmatism value of the intermediate image is greater than 11.0 mm; an aberration of the intermediate image is greater than 1.5%; a RMS of a spot diameter on an optical axis of the projection optical system is greater than 0.5 mm; a RMS of a spot diameter at a field point farthest away from the optical axis of the projection optical system is greater than 5 mm; and a RMS deviation of a wavefront at the intermediate image is greater than 10λ
/NA, wherein λ
is a wavelength of imaging light and NA is a numerical aperture of the imaging at the intermediate image. - View Dependent Claims (36, 37)
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38. A method of manufacturing a microstructured device, comprising:
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a first imaging of a patterning structure into an intermediate image of the patterning structure; and a second imaging of the intermediate image of the patterning structure into a region of a radiation sensitive substrate for exposing the radiation sensitive substrate, wherein the first imaging and the second imaging are performed by using a refractive projection optical system, and wherein the first imaging is performed such that at least one of the following conditions is fulfilled; an angle of at least one chief ray of the image is less than 1°
;a longitudinal spherical aberration of;
the image is less than 0.001 mm;an astigmatism value of the image is less than 100 nm; an aberration of the image is less than 0.001%; a RMS of a spot diameter on an optical axis of the projection optical system is less than 0.001 mm; a RMS of a spot diameter at a field point farthest away from the optical axis of the projection optical system is less than 0.002 mm; and a RMS deviation of a wave front is less than 0.1 times a diffraction limit. - View Dependent Claims (39, 40)
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Specification