US20160026094A1 - Method and device for the correction of imaging defects - Google Patents
Method and device for the correction of imaging defects Download PDFInfo
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- US20160026094A1 US20160026094A1 US14/843,338 US201514843338A US2016026094A1 US 20160026094 A1 US20160026094 A1 US 20160026094A1 US 201514843338 A US201514843338 A US 201514843338A US 2016026094 A1 US2016026094 A1 US 2016026094A1
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- optical corrective
- corrective element
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70058—Mask illumination systems
- G03F7/70191—Optical correction elements, filters or phase plates for controlling intensity, wavelength, polarisation, phase or the like
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70216—Mask projection systems
- G03F7/70308—Optical correction elements, filters or phase plates for manipulating imaging light, e.g. intensity, wavelength, polarisation, phase or image shift
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70058—Mask illumination systems
- G03F7/70133—Measurement of illumination distribution, in pupil plane or field plane
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70491—Information management, e.g. software; Active and passive control, e.g. details of controlling exposure processes or exposure tool monitoring processes
- G03F7/70516—Calibration of components of the microlithographic apparatus, e.g. light sources, addressable masks or detectors
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/7055—Exposure light control in all parts of the microlithographic apparatus, e.g. pulse length control or light interruption
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus
- G03F7/70825—Mounting of individual elements, e.g. mounts, holders or supports
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70908—Hygiene, e.g. preventing apparatus pollution, mitigating effect of pollution or removing pollutants from apparatus
- G03F7/70933—Purge, e.g. exchanging fluid or gas to remove pollutants
Abstract
The disclosure relates to a microlithography projection exposure system having optical corrective elements configured to modify the imaging characteristics, as well as related systems and component.
Description
- This application is a divisional of U.S. application Ser. No. 12/171,394, filed Jul. 11, 2008, which is a continuation of international application No. PCT/EP2006/012120, filed Dec. 15, 2006, which claims benefit of U.S. Ser. No. 11/341,894, filed Jan. 30, 2006. The contents of U.S. Application Ser. No. 12/171,394 and international application No. PCT/EP2006/012120 are hereby incorporated by reference.
- The disclosure relates to a microlithography projection exposure system having optical corrective elements configured to modify the imaging characteristics, as well as related systems and components.
-
FIG. 1 shows such an example of aprojection exposure system 1 that includes anillumination apparatus 3 and anapparatus 4 to accommodate and position a mask provided with a grid-like structure, a so-calledreticle 5, by which the subsequent structures on awafer 2 are determined.Projection exposure system 1 also includes anapparatus 6 to hold, move and position thewafer 2, and an imaging apparatus, namely aprojection objective 7 having a plurality of optical elements, such aslenses 8 which are mounted in anobjective housing 10 of theprojection objective 7 viaframes 9. - Typically, a basic functional principle in this case provides that the structures inserted into the
reticle 5 are imaged reduced in size on thewafer 2. Theillumination apparatus 3 provides aprojection beam 11 of electromagnetic radiation for imaging thereticle 5 on thewafer 2, for example from the visible band, the UV or EUV band. A laser or the like can be used as a source of this radiation. The radiation is formed in theillumination apparatus 3 by optical elements such that theprojection beam 11 has the desired properties with regard to diameter, polarization, shape of the wavefront and the like when it is incident on thereticle 5. The optical elements may be refractive, reflective, or different types of components, or combinations thereof. - Often, after exposure, the
wafer 2 is moved on in the direction of the arrow, so that a multiplicity of individual regions, each having the structure prescribed by thereticle 5, are exposed on thesame wafer 2. Due to the step-like feeding movement of thewafer 2 in theprojection exposure system 1, it is often also referred to as a stepper. Optionally, a scanning image of each area is carried out in many modern machines, and such systems are commonly referred to as scanners. - An image of the
reticle 5 is generated via theprojection beam 11 and is transferred to thewafer 2 with a correspondingly reduced size by theprojection objective 7, as already explained above. Theprojection objective 7 has a multiplicity of individual refractive, diffractive and/or reflective optical elements such as lenses, mirrors, prisms, end plates and the like. - In some embodiments, the disclosure provides a device and a method by which flexible correction of imaging defects in a projection exposure system is possible with simultaneously minimal mechanical and thermal loads and minimal contamination of the interior of the system. In certain embodiments, the disclosure provides a device that permits improved correction of imaging defects in projection exposure systems.
- In some embodiments, the projection exposure system used in semiconductor lithography has a first and at least one further optical corrective element, with the first optical corrective element being arranged in the region of a pupil plane of the projection exposure system and the further optical corrective element being arranged at a greater distance from the pupil plane than the first corrective element. In some instances, the first corrective element is arranged at a distance from the pupil plane which corresponds to a sub-aperture ratio of greater than 0.75, such as greater than 0.9. The sub-aperture ratio is a measure of the distance of an object to a pupil plane; a sub-aperture ratio of 1 means that an object is located on the pupil plane. The closer the sub-aperture ratio tends to 0, the greater is the distance between the object and the pupil plane. A more detailed description of the definition of the sub-aperture ratio can be found in the U.S. provisional application U.S. No. 60/696118, from the same applicant. There, the sub-aperture ratio is described as the ratio of the principal beam height to the marginal beam height VM on the optically active surface of an optical element. The further optical corrective element can be arranged at a distance from the pupil plane which corresponds to a sub-aperture ratio of less than 0.75, such as less than 0.5. This arrangement of the two optical corrective elements can provide the advantage of efficient correction of image defects, such as constant image defects over the entire image plane, in the region of the pupil plane. Because the optical elements arranged in the region of the pupil plane can generate constant image defects over the entire image plane, effective correction of such defects is may be possible by this approach.
- In some embodiments, an optical corrective element is a plane-parallel plate. Optionally, one, several, or even all optical corrective elements can be plane-parallel plates. Plane-parallel plates as corrective elements can provide the advantage that they are easy to manufacture and replace in the projection exposure system, and that they can be measured in a simple manner via interferometric methods. Furthermore, their corrective action is comparatively robust against eccentricities—particularly when used in the vicinity of a pupil plane.
- In certain embodiments, an optical corrective element can be a screen, such as a vapor-deposited screen of the first order or a variable screen.
- In some embodiments, an optical corrective element is an interference filter or an intensity filter, such as a neutral filter. Here, neutral filters have the property that they allow, in a simple manner, compensation for local deviations in the transmission of the objective, such as in the radial direction.
- One advantageous use of screens is that the zero-order diffraction of the diffraction image generated by the reticle can be efficiently masked or attenuated by a screen arranged on a pupil plane or in the vicinity of a pupil plane, leading to an improvement in the contrast and hence an improvement to the image on the wafer. However, the diffraction occurring at the reticle depends strongly on the type of structures to be exposed and the illumination settings. This makes it desirable to flexibly match the used shape and position of the screen to the respectively given conditions. By way of example, this can be achieved by providing a replacement device which permits a rapid replacement of the optical corrective element as soon as the optical conditions change, for example when a new reticle is used. Here, the use of a replacement device has the particular advantage that, it is not necessary to completely open the objective housing to replace the optical corrective element, as a result of which the risk of contamination of the interior of the objective housing is reduced. Of course, the use of the replacement device is not limited to the rapid replacement of screens; the further optical corrective elements specified above can advantageously also be rapidly replaced by the replacement device.
- The arrangement of the further optical corrective element at a greater distance from the pupil plane than the first optical corrective element means that this corrective element will be closer to a field plane of the projection exposure system than the first optical corrective element. Here, a field plane or an image plane is understood to be a plane in which an image or intermediate image of the object plane is generated. Typically, the optical elements used, for example lenses, are particularly exposed to inhomogeneous loads, which lead to imaging defects. The density of the lens material can locally change or increase in the strongly illuminated areas, so that the imaging properties of the lens change and imaging defects result. Effective correction of such defects can be achieved using the solution according to the disclosure by virtue of the fact that the further optical corrective element is arranged in the region of those optical elements of the projection exposure system which are in the vicinity of the field, since in this manner the defects caused by the effects described above can be rectified in the vicinity of the location of their creation.
- One advantageous procedure for replacing the optical corrective element is to firstly record the application parameters of the projection exposure system, and to predict degradation phenomena on the basis of the recording. Subsequently, at least one matched corrective element can be produced in advance, significantly before the planned point in time of a replacement, and then be replaced at a defined point in time. This procedure can be further improved by additional measurement of the application parameters of the projection exposure system, or prediction of the expected degradation appearances on the basis of drift measurements and/or known illumination parameters. This method has the advantage that the times to replace optical corrective elements can be reduced effectively.
- The disclosure is provided in connection with
FIGS. 1 to 7 , in which: -
FIG. 1 shows an exemplary micro lithography projection exposure apparatus; -
FIG. 2 shows an exemplary arrangement of the two optical corrective elements in the projection objective of a projection exposure system; -
FIG. 3 shows an exemplary replacement device for replacing one of the optical corrective elements; -
FIG. 4 shows a replacement device is in the form of a rotating disk; -
FIG. 5 shows the replacement device as a rotating disk; -
FIG. 5 a shows the replacement device in conjunction with two mutually opposite magazines; -
FIG. 6 shows a carriage as a replacement device combined with a magazine in the form of a rotating disk; -
FIG. 7 shows the optical corrective elements are arranged together on a holding frame; and -
FIG. 8 shows a concept for mounting an optical corrective element. -
FIG. 2 shows an exemplary arrangement of the two opticalcorrective elements projection objective 7 of a projection exposure system. Theprojection objective 7 has a plurality oflenses 8 mounted inframes 9; furthermore, the location of apupil plane 12 of theprojection objective 7 is indicated by a dashed line. Here, in the region of thepupil plane 12, the first opticalcorrective element 13 is connected to the holdingelements 16 viamanipulators 15; a loose arrangement of the opticalcorrective elements manipulators 15 allow variation of the tilting of the opticalcorrective element 13 or else variation of the distance of the opticalcorrective element 13 from thepupil plane 12; in this case, they can be in the form of piezo-manipulators. Here, the opticalcorrective element 13 can be fixed to themanipulators 15 by, for example, spring elements, pneumatic elements, magnetic elements, reduced pressure elements or else interlocking elements. The distance at which the firstcorrective element 13 is arranged from thepupil plane 12 corresponds to a sub-aperture ratio of >0.75. The second opticalcorrective element 14 is arranged at a distance from thepupil plane 12 and hence from the first opticalcorrective element 13; in this case, the distance of the second opticalcorrective element 14 from thepupil plane 12 corresponds to a sub-aperture ratio of <0.75. By way of example, the opticalcorrective elements corrective elements corrective elements FIG. 2 ; in fact, it is also feasible for further optical elements to be arranged in the region between the opticalcorrective elements -
FIG. 3 shows anexemplary replacement device 17 for replacing one of the opticalcorrective elements FIG. 3 , thereplacement device 17 is in the form of a carriage. In this case, thereplacement device 17 in the form of a carriage is an arrangement of fixedguide rails 19 connected tomoveable guide rails 18 byadapter frame 29, ensuring linear guidance of the opticalcorrective element 13 into the beam path of the projection objective 7 (not illustrated inFIG. 3 ). In this case, themoveable guide rails 18, theadapter frame 29 or else the fixedguide rails 19 can be equipped withsensor units 20 for determining the position of the opticalcorrective element 13. The drive of thereplacement device 17, not illustrated inFIG. 3 , should in this case be selected such that the introduction of vibration or else of heat into theprojection objective 7 is kept as low as possible; this can be achieved by the use of linear motors, pneumatic elements or else moving coils for a drive. - In the example shown in
FIG. 3 , the opticalcorrective element 13 is an intensity filter for the central shadow. Via thereplacement device 17, the opticalcorrective element 13 is inserted in the region of the holdingelement 16 by a linear motion. Here, the final position of the opticalcorrective element 13 with respect to the other components of theprojection objective 7 is determined during the insertion of the opticalcorrective element 13 into theadapter frame 29. In this case, the holdingelement 16 is connected to theobjective housing 10 of the projection objective 7 (not illustrated inFIG. 3 ). - This measure means that the vast majority of the components of the
replacement device 17 have no contact with the interior of the objective. - This can result in various advantages, such as:
-
- the components for the positioning of the external optical
corrective element 13 can avoid particle created by friction from being deposited on the surfaces of the optical elements arranged in theprojection objective 7, and causing scattered light; - in the case of defect, the optical
corrective element 13 can be completely replaced with little effort and without replacing theentire projection objective 7; - upgrades/redesigns can be undertaken even in the case of objectives which are already in use without the need to replace the objective; in this case, an optical
corrective element 13 which is completely different to the originally used element can also be installed; and/or - the service can be sped up with a reduced downtime of the projection exposure system.
- the components for the positioning of the external optical
-
FIG. 4 shows thereplacement device 17 is in the form of a rotating disk. In this case, thereplacement device 17 in the form of a rotating disk has fouraccommodation units 22 for accommodating opticalcorrective elements 13. In the present example, three of the fouraccommodation units 22 of thereplacement device 17 in the form of a rotating disk are provided with opticalcorrective elements 13, in this case intensity filters; thefourth accommodation unit 22 remains empty, as a result of which exposure without an intensity filter, for example, becomes possible, or it is possible to provide theempty accommodation unit 22 for replacement of the opticalcorrective element 13. The particular advantage of using a rotating disk as areplacement device 17 that this makes it possible to keep the horizontal forces acting on theobjective housing 10, and hence theprojection objective 7, to a minimum, since only torques and no linear forces occur as the acceleration torques during rapid braking or acceleration of thereplacement device 17. In this case, as illustrated inFIG. 4 , thereplacement device 17 in the form of a rotating disk can be partly located outside theobjective housing 10, making it easier to replace the opticalcorrective elements 13. This advantage is however offset by the disadvantage that, if part of thereplacement device 17 in the form of a rotating disk is arranged outside theobjective housing 10, increased complexity is desired to avoid the influx of dirt into the interior of theobjective housing 10. This problem can be resolved by arranging thereplacement device 17 in the form of a rotating disk completely in the interior of theobjective housing 10; of course, this results in certain limitations with regard to the maximum number of opticalcorrective elements 13 available for rapid replacement. It is furthermore feasible to arrange the drive of the replacement device in the form of a rotating disk not illustrated inFIG. 4 both within and outside of theobjective housing 10. - The
replacement device 17 isFIG. 5 is a rotating disk.FIG. 5 shows areplacement device 17 in the form of a linear carriage. Here, theaccommodation units 22 of thereplacement device 17 in the form of a linear carriage are arranged linearly along the profile of the carriage. In this case, thereplacement device 17 in the form of a linear carriage can run horizontally through the entireobjective housing 10. It is common to both solutions illustrated inFIGS. 4 and 5 that thereplacement device 17 itself has a plurality ofaccommodation units 22 and thus has a dual functionality asreplacement device 17 on the one hand, and magazine on the other. It is particularly advantageous in the case of this solution that a separate magazine can be dispensed with, as a result of which a significant amount of installation space can be saved. -
FIG. 5 a provides a high degree of flexibility and rapid replacement in particular. Thereplacement device 17 is in the form of a linear carriage with twoaccommodation units 22 for opticalcorrective elements 13. In contrast toFIG. 5 , twostack magazines objective housing 10. Here, thereplacement device 17 can be moved horizontally in a linear movement from onemagazine 23 a,b to the other through the entireobjective housing 10. Using this, the removal of one optical corrective element from the beam path of the projection exposure system and the insertion of an optical corrective element can be carried out within the same movement of the replacement device, without changing the direction of the movement. As a result, the number of acceleration and deceleration processes for the replacement of an optical corrective element is minimized, this allowing quicker replacement. Opticalcorrective elements 13 can be removed from or inserted into thereplacement device 17 from both themagazine 23 a andmagazine 23 b. During the operation of the projection exposure system with an opticalcorrective element 13 in one of themagazines corrective element 13 for the subsequently provided operational parameters of the system into theaccommodation unit 22 of thereplacement device 17. This procedure allows a no-longer requiredcorrective element 13 out of the beam path of the system and, during the course of the same movement, insertion of the newcorrective element 13 for the parameters of the system into the beam path within a single linear movement, with a practically unlimited number of different corrective elements. This allows changes to the parameters of the system within a time of <30 ms, such as <10 ms. Via the mentioned measure, the level of utilization of the system can be significantly increased and thus the productivity can be improved. - Of course, the idea illustrated by
FIG. 5 a can also be transferred to the other embodiments. -
FIG. 6 shows a carriage used as thereplacement device 17 is combined with amagazine 23 in the form of a rotating disk. In this case, themagazine 23 has fouraccommodation units 22, three of which are equipped with opticalcorrective elements 13. Thefourth accommodation unit 22 is not occupied in the present example; it is available for accommodating an opticalcorrective element 13 from the interior of theobjective housing 10. Thereplacement device 17 is, in the form of as a linear carriage which moves in and out of the interior of theobjective housing 10 along the guide rails 18 and 19. This can provide the advantage that the opening, through which the opticalcorrective elements 13 are inserted into the interior of theobjective housing 10, can be kept small in comparison with the rotating disk solution described inFIG. 4 and, in this manner, the risk of the introduction of dirt into the interior of theobjective housing 10 can be effectively reduced. Moreover, the risk of contamination can be further reduced by providing apart 24, through which the opticalcorrective elements 13 pass prior to and after replacement and through which, by way of example, a purge gas is continuously passed, as a result of which dirt possibly penetrating from the outside can be discharged before the opticalcorrective element 13 reaches the interior of theobjective housing 10. In this case, it is also feasible for theentire replacement device 17 and themagazine 23 to be arranged together in a space through which purge gas passes, so that, during the process of replacing the opticalcorrective element 13, there is no contact with the surroundings and, purge gas already flows around the opticalcorrective elements 13 during their storage in themagazine 23 and the elements are thus protected to the greatest possible extent from contamination. - In this case, the purge gas can advantageously be discharged from the projection objective in the region of the
replacement device 17; in other words, the main purge outlet (not illustrated) of theprojection objective 7 is located in the region of thereplacement device 17. By this measure, contamination of the interior of theprojection objective 7 is avoided particularly effectively. - In some embodiments, the
magazine 23 can also be a stack magazine with opticalcorrective elements - It is likewise possible to implement the
replacement device 17 in such a manner that a rotating disk provided with a plurality of opticalcorrective elements 13 is located on a linear carriage and can be inserted completely into the interior of theobjective housing 10 or also be removed therefrom. Solutions in which the opticalcorrective element 13 is replaced by a swinging arm or a double swinging arm are also conceivable. - Of course it is possible to replacement both the optical
corrective elements 13 closer to thepupil plane 12 and the opticalcorrective elements 14 further away from thepupil plane 12 by the above-described exemplary arrangements. - A further advantageous implementation of the present disclosure is illustrated in
FIG. 7 . The opticalcorrective elements frame 25. In this case, for example, the first opticalcorrective element 13 can be permanently integrated in the holding frame in the vicinity of the pupil plane. The holding frame holds the second opticalcorrective element 14 by the holdingelements 16 and themanipulators 15. In this case, the holdingframe 25 can be designed in such a manner that it can easily be replaced as a whole. Furthermore, on account of the described modular design, the second opticalcorrective element 14 in the holdingframe 25 can be replaced without removing it from theobjective housing 10. By way of example, in combination with themagazine 23 in the form of a stack magazine, the second opticalcorrective element 14 can, in this manner, easily be replaced in a known manner (see the previous figures); furthermore this can provide the advantage that the two opticalcorrective elements -
FIG. 8 shows a bearing concept for mounting an opticalcorrective element projection objective 7, the opticalcorrective element bearing points 27 via thesupports projection objective 7, not illustrated inFIG. 8 . In this case, the design of the bearing points 27 can be chosen in such a way that a bearing point made from a hard metal, a ruby prism or hardened steel is used. Here, thefirst support 26 is implemented as a fixed support; a loose support is used in the present example as asecond support 28, in which the line contact principle is used. - The described variants and exemplary embodiments of the disclosure should not be considered in isolation; any combinations of the previously illustrated solutions are of course conceivable.
Claims (22)
1.-53. (canceled)
54. A system, comprising:
a holding frame;
a first optical corrective element held by the holding frame; and
a second optical corrective element held by the holding frame so that the second optical corrective element is replaceable and so that the second optical corrective element is manipulable,
wherein the system is a microlithography projection exposure system.
55. The system of claim 54 , further comprising a holding element configured to hold the second optical corrective element in the holding frame.
56. The system of claim 55 , further comprising a manipulator configured to manipulate the second optical corrective element in the holding frame.
57. The system of claim 54 , further comprising a manipulator configured to manipulate the second optical corrective element in the holding frame.
58. The system of claim 54 , wherein the holding frame is replaceable.
59. The system of claim 54 , wherein the system is configured so that, when the second optical corrective element is replaced, the holding frame is not removed from the system.
60. The system of claim 54 , further comprising a device configured to hold the second optical corrective element after the second optical corrective element is replaced.
61. The system of claim 60 , further comprising a third optical corrective element, wherein:
before replacement of the second optical corrective element:
the second optical corrective element is held by the holding frame; and
the third optical corrective element is held by the device; and
after replacement of the second optical corrective element:
the second optical corrective element is held by the device; and
the third optical corrective element is held by the holding frame.
62. The system of claim 61 , further comprising at least one additional optical corrective element held by the device.
63. The system of claim 60 , further comprising at least one additional optical corrective element held by the device.
64. The system of claim 60 , further comprising a mechanism to transport the second optical corrective element from the holder to the device.
65. The system of claim 60 , wherein the device comprises a magazine.
66. The system of claim 54 , wherein the first optical corrective element comprises a plane-parallel plate, and/or the second optical corrective element comprises a plane-parallel plate.
67. The system of claim 54 , wherein the first optical corrective element comprises a screen, and/or the second optical corrective element comprises a screen.
68. The system of claim 54 , wherein the first optical corrective element comprises an intensity filter, and/or the second optical corrective element comprises an intensity filter.
69. The system of claim 54 , wherein the second optical corrective element comprises a plane-parallel plate.
70. The system of claim 54 , further comprising a sensor unit configured to determine a position of the first optical corrective element.
71. The system of claim 54 , wherein an optically active surface of the first optical corrective element is a distance from a pupil plane of the system where a ratio of a principal beam height to a marginal beam height is greater than 0.75.
72. A system, comprising:
an illumination apparatus; and
a projection objective, comprising:
a holding frame;
a first optical corrective element held by the holding frame; and
a second optical corrective element held by the holding frame so that the second optical corrective element is replaceable and so that the second optical corrective element is manipulable,
wherein:
an optically active surface of the first optical corrective element is a distance from a pupil plane of the system where a ratio of a principal beam height to a marginal beam height is greater than 0.75; and
the system is a microlithography projection exposure system.
73. An objective, comprising:
a holding frame;
a first optical corrective element held by the holding frame; and
a second optical corrective element held by the holding frame so that the second optical corrective element is replaceable and so that the second optical corrective element is manipulable,
wherein:
an optically active surface of the first optical corrective element is a distance from a pupil plane of the system where a ratio of a principal beam height to a marginal beam height is greater than 0.75; and
the objective is a microlithography projection objective.
74. The objective of claim 73 , further comprising a housing supporting the holding frame, wherein the objective is configured so that, when the second optical corrective element is replaced, the holding frame is not removed from the housing.
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US14/843,338 US20160026094A1 (en) | 2006-01-30 | 2015-09-02 | Method and device for the correction of imaging defects |
US16/271,073 US10620543B2 (en) | 2006-01-30 | 2019-02-08 | Method and device for the correction of imaging defects |
US16/840,767 US11003088B2 (en) | 2006-01-30 | 2020-04-06 | Method and device for the correction of imaging defects |
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US11/341,894 US7724351B2 (en) | 2006-01-30 | 2006-01-30 | Lithographic apparatus, device manufacturing method and exchangeable optical element |
PCT/EP2006/012120 WO2007085290A2 (en) | 2006-01-30 | 2006-12-15 | Method and device for the correction of imaging defects |
US12/171,394 US8159648B2 (en) | 2006-01-30 | 2008-07-11 | Method and device for the correction of imaging defects |
US13/423,965 US20120176591A1 (en) | 2006-01-30 | 2012-03-19 | Method and device for the correction of imaging defects |
US14/843,338 US20160026094A1 (en) | 2006-01-30 | 2015-09-02 | Method and device for the correction of imaging defects |
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US12/171,394 Expired - Fee Related US8159648B2 (en) | 2006-01-30 | 2008-07-11 | Method and device for the correction of imaging defects |
US13/423,965 Abandoned US20120176591A1 (en) | 2006-01-30 | 2012-03-19 | Method and device for the correction of imaging defects |
US14/843,338 Abandoned US20160026094A1 (en) | 2006-01-30 | 2015-09-02 | Method and device for the correction of imaging defects |
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US12/171,394 Expired - Fee Related US8159648B2 (en) | 2006-01-30 | 2008-07-11 | Method and device for the correction of imaging defects |
US13/423,965 Abandoned US20120176591A1 (en) | 2006-01-30 | 2012-03-19 | Method and device for the correction of imaging defects |
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US16/840,767 Active US11003088B2 (en) | 2006-01-30 | 2020-04-06 | Method and device for the correction of imaging defects |
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US (6) | US7724351B2 (en) |
EP (2) | EP1982233A2 (en) |
JP (2) | JP2009525599A (en) |
KR (2) | KR20080098629A (en) |
CN (1) | CN101013269B (en) |
SG (1) | SG134294A1 (en) |
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US10620543B2 (en) | 2006-01-30 | 2020-04-14 | Carl Zeiss Smt Gmbh | Method and device for the correction of imaging defects |
US11003088B2 (en) | 2006-01-30 | 2021-05-11 | Carl Zeiss Smt Gmbh | Method and device for the correction of imaging defects |
Also Published As
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US20200233314A1 (en) | 2020-07-23 |
JP4854530B2 (en) | 2012-01-18 |
KR100894887B1 (en) | 2009-04-30 |
CN101013269B (en) | 2011-01-12 |
US20070177122A1 (en) | 2007-08-02 |
EP1813989A1 (en) | 2007-08-01 |
WO2007085290A3 (en) | 2007-10-04 |
US20080316444A1 (en) | 2008-12-25 |
US11003088B2 (en) | 2021-05-11 |
KR20070078816A (en) | 2007-08-02 |
WO2007085290A2 (en) | 2007-08-02 |
US20190302627A1 (en) | 2019-10-03 |
TW200732857A (en) | 2007-09-01 |
US7724351B2 (en) | 2010-05-25 |
US10620543B2 (en) | 2020-04-14 |
JP2009525599A (en) | 2009-07-09 |
US20120176591A1 (en) | 2012-07-12 |
JP2007208257A (en) | 2007-08-16 |
CN101013269A (en) | 2007-08-08 |
US8159648B2 (en) | 2012-04-17 |
KR20080098629A (en) | 2008-11-11 |
SG134294A1 (en) | 2007-08-29 |
EP1982233A2 (en) | 2008-10-22 |
TWI352880B (en) | 2011-11-21 |
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