WO2005074014A1 - ステージ駆動方法及びステージ装置、露光装置、並びにデバイス製造方法 - Google Patents
ステージ駆動方法及びステージ装置、露光装置、並びにデバイス製造方法 Download PDFInfo
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- WO2005074014A1 WO2005074014A1 PCT/JP2005/001076 JP2005001076W WO2005074014A1 WO 2005074014 A1 WO2005074014 A1 WO 2005074014A1 JP 2005001076 W JP2005001076 W JP 2005001076W WO 2005074014 A1 WO2005074014 A1 WO 2005074014A1
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Classifications
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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
- G03F7/70691—Handling of masks or workpieces
- G03F7/70716—Stages
- G03F7/70725—Stages control
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- G—PHYSICS
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- 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
- G03F7/70341—Details of immersion lithography aspects, e.g. exposure media or control of immersion liquid supply
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
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- 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
- G03F7/70605—Workpiece metrology
- G03F7/70653—Metrology techniques
- G03F7/70666—Aerial image, i.e. measuring the image of the patterned exposure light at the image plane of the projection system
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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
- G03F7/70691—Handling of masks or workpieces
- G03F7/70733—Handling masks and workpieces, e.g. exchange of workpiece or mask, transport of workpiece or mask
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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
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- G—PHYSICS
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- 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
- G03F7/70691—Handling of masks or workpieces
- G03F7/70775—Position control, e.g. interferometers or encoders for determining the stage position
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- G—PHYSICS
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- 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
- G03F7/70833—Mounting of optical systems, e.g. mounting of illumination system, projection system or stage systems on base-plate or ground
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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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49124—On flat or curved insulated base, e.g., printed circuit, etc.
- Y10T29/49155—Manufacturing circuit on or in base
Definitions
- Stage driving method stage apparatus, exposure apparatus, and device manufacturing method
- the present invention relates to a stage driving method, a stage apparatus, an exposure apparatus, and a device manufacturing method, and more particularly, to moving a region including a first region in a two-dimensional plane to which a liquid is locally supplied.
- a stage driving method for driving two possible stages, a stage device suitable for carrying out the stage driving method, a liquid supplied between a projection optical system and a substrate, and a liquid supplied through the projection optical system and the liquid The present invention relates to an exposure apparatus for exposing a substrate and a device manufacturing method using the exposure apparatus.
- a photosensitive substrate such as a wafer or a glass plate coated with a resist (photosensitive agent)
- a photosensitive substrate such as a wafer or a glass plate coated with a resist (photosensitive agent)
- D AND-repeat type reduction projection exposure apparatus
- D stepper
- scanning stepper also called a scanner
- the resolution R of the projection optical system provided in the projection exposure apparatus is expressed by the following Rayleigh equation (1).
- e is the exposure wavelength
- ⁇ is the numerical aperture of the projection optical system
- k is the process coefficient
- the resolution R increases as the exposure wavelength (exposure light wavelength) used decreases and as the numerical aperture (NA) of the projection optical system increases. For this reason, the exposure wavelength used in projection exposure apparatuses has been shortened year by year with the miniaturization of integrated circuits.
- ArF excimer lasers (wavelength 193 nm) with shorter wavelengths than KrF excimer lasers (wavelength 248 nm) are used as light sources. Exposure equipment has been put to practical use. Also, the numerical aperture of the projection optical system is gradually increasing. ing.
- the depth of focus (DOF) is as important as the resolution. Depth of focus ⁇
- Equation (1) and (2) it can be seen that when the exposure wavelength ⁇ is shortened and the numerical aperture ⁇ ⁇ ⁇ is increased (increased) in order to increase the resolution R, the depth of focus ⁇ becomes narrower.
- the force of performing exposure while aligning the surface of the wafer with the image plane of the projection optical system it is desirable that the depth of focus ⁇ is wide to some extent.
- the depth of focus has been narrowed.
- the exposure wavelength will be further shortened in the future. If the exposure wavelength is kept as it is, the depth of focus becomes too narrow, and the focus margin during the exposure operation may become insufficient.
- an exposure apparatus using an immersion method As an exposure apparatus using this liquid immersion method, there is known an exposure apparatus that performs exposure while a space between a lower surface of a projection optical system and a wafer surface is locally filled with a liquid such as water or an organic solvent.
- a liquid such as water or an organic solvent.
- Patent Document 1 the wavelength of exposure light in liquid is 1 / ⁇ times that in air ( ⁇ is the refractive index of liquid and is usually about 1.2 to 1.6).
- the depth of focus is ⁇ compared to a projection optical system (assuming that such a projection optical system can be manufactured) that can obtain the same resolution as the resolution without using the liquid immersion method, while improving the resolution by using this method.
- the depth of focus can be substantially increased by ⁇ times compared to that in the air.
- the optical path space on the image plane side of the projection optical system is changed from a wet state to a dry state. If the dry state continues when it is in the state, the surface of the lowermost optical member (lens or glass plate, etc .; hereinafter, referred to as “tip lens”) that constitutes the projection optical system also called the front lens will be stained with water. (Watermark) may occur.
- tip lens the surface of the lowermost optical member that constitutes the projection optical system also called the front lens
- water stains water marks on the surface of the optical member that is a component of the autofocus mechanism.
- the occurrence of the water stain may cause a decrease in the transmittance of the projection optical system or a flare, and may also deteriorate other imaging performance of the projection optical system. Further, when a watermark is generated on the prism or the like, there is a possibility that the surface alignment accuracy when the surface of the wafer is aligned with the image plane of the projection optical system by the autofocus method may be reduced. In addition, when the occurrence of the watermark is severe, it is necessary to replace the tip lens and the optical member. However, the time required for the replacement is a factor that reduces the operation rate of the exposure device.
- a stain formed on a tip lens or the like is also referred to as a water stain.
- Patent Document 1 WO 99/49504 pamphlet
- the present invention has been made under the above circumstances, and from a first viewpoint, a first region in a two-dimensional plane to which a liquid is locally supplied and a first region of the first region.
- the first and second stages may be driven independently.
- the first stage and the second stage Driving the first and second stages simultaneously in the second axis direction while maintaining either the close state or the contact state in the second axis direction intersecting with the first axis direction. This is the first stage driving method.
- the state in which the first stage and the second stage are close to each other means that the liquid does not leak out from between the first stage and the second stage, or that the liquid leaks less.
- the allowable value of the interval between the first stage and the second stage differs depending on the material of the two stages, the type of liquid, and the like.
- the expression “the first stage and the second stage are in close proximity” is used in this sense.
- an area in a predetermined range including the first area in the two-dimensional plane to which the liquid is locally supplied and the second area located on one side of the first area in the first axial direction.
- the transition from the first state to the second state can be performed while suppressing. That is, from the state where the liquid is held on one stage, the state where the liquid is held across both stages, and the state where the liquid is held on the other stage, the total recovery of the liquid It is possible to make a transition without going through the step of re-supply. Therefore, the transition from the first state to the second state can be performed in a short time.
- a first area in a two-dimensional plane to which a liquid is locally supplied and a second area located on one side of the first area in a first axial direction are provided.
- the first stage is driven within a predetermined range including the first region
- a first stage is driven within a predetermined range including the first region and a third region located on the other side of the first region in the first axial direction.
- a second stage driving method is characterized by simultaneously driving in the first axis direction.
- Drive the first stage within When driving the second stage within a predetermined range including the first region and a third region located on the other side of the first region in the first axial direction, one of the stages is driven by the second stage.
- the other stage makes a transition from the first state located in the first area to the second state located in the first area, the first stage and the second stage are brought into close proximity and contact with each other in the first axial direction. Are simultaneously driven in the first axis direction while maintaining any force in the state.
- the transition from the first state to the second state becomes possible. That is, from the state in which the liquid is held on one stage to the state in which the liquid is held across both stages, the state in which the liquid is held on the other It is possible to make a transition without going through the process of re-supply. Therefore, the transition from the first state to the second state can be performed in a short time.
- a first stage and a second stage that can be independently driven within a predetermined range including: a first stage in which one of the first and second stages is located in the first region; When the first stage transitions to the second state located in the first region, the first stage and the second stage are brought into close proximity to and in contact with each other in a second axis direction intersecting with the first axis direction.
- a control device for controlling the first and second stages so that the first and second stages move simultaneously in the second axis direction while maintaining either of the forces. It is.
- one of the first and second stages is shifted from the first state located in the first region in the two-dimensional plane to which the liquid is locally supplied to the other stage.
- the control device maintains the first and second stages in a state of being close to or in contact with each other in the second axis direction intersecting with the first axis direction. It is controlled to move simultaneously in the second axis direction. This prevents leakage of liquid from the gap between the first and second stages (both stages) when the liquid immersion area is formed on at least one of the first and second stages.
- the transition from the first state to the second state can be performed while suppressing.
- the liquid on one stage From the state where the liquid is held on both stages to the state where the liquid is held on both stages, and from the state where the liquid is held on the other stage. It becomes possible to make a transition. Therefore, transition from the first state to the second state can be performed in a short time.
- a first area in a two-dimensional plane to which a liquid is locally supplied and a second area located on one side of the first area in the first axial direction A first stage movable within a predetermined range including: a first stage movable within a predetermined range including: a first stage, and a third region located on the other side of the first region in the first axial direction.
- the first stage and the second stage When the first stage and the second stage are shifted to the first state, the first stage and the second stage maintain one of a state in which the first stage and the second stage are close to each other and a state in which the first stage is in contact with the first axis, and A control device for controlling the first and second stages so as to simultaneously move in one axis direction.
- the device When the first stage and the second stage are shifted to the first state, the first stage and the second stage maintain one of a state in which the first stage and the second stage are close to each other and a state in which the first stage is in contact with the first axis, and A control device for controlling the first and second stages so as to simultaneously move in one axis direction. The device.
- one of the first and second stages is shifted from the first state located in the first area in the two-dimensional plane where the liquid is locally supplied to the other stage.
- the controller makes a transition to the second state located in the first region, the controller causes the first stage and the second stage to maintain either a close-contact state or a contact state in the first axial direction. Are controlled to move simultaneously in the first axis direction.
- the transition from the first state to the second state can be performed in a short time.
- an exposure apparatus for supplying a liquid between a projection optical system and a substrate and exposing the substrate with an energy beam through the projection optical system and the liquid.
- a stage drive system which is disposed above the second area and is located on the first stage; A first mark detection system that detects a mark; and a second mark detection system that is disposed above the third area and detects a mark that exists on the second stage. It is.
- the first and second stages are simultaneously driven in the first axis direction by the stage drive system while the first and second stages are maintained in either the close state or the contact state in the first axis direction. .
- the liquid is held between the projection optical system and at least one of the stages directly below the projection optical system, while preventing or suppressing the leakage of the liquid from the gap between the first and second stages.
- the substrate is exposed through the projection optical system and the liquid using one stage.
- the substrate is exposed through the projection optical system and the liquid using the other stage. From the state where the liquid is held between one stage and the projection optical system, the state where the liquid is held between both stages and the projection optical system, and then the other stage and the projection optical system It is possible to make a transition to a state where the liquid is held between the system and the system without going through the steps of total recovery of the liquid and supply of the liquid again. Therefore, it is possible to start the exposure operation on the substrate on the other stage in a short time after the exposure operation on the substrate on one stage is completed.
- the above-described water stain water (A single mark) can be effectively prevented.
- the exposure operation on the substrate on the first stage and the mark detection operation (alignment operation) on the substrate on the second stage by the second mark detection system, and the exposure operation on the substrate on the second stage and the first The mark detection operation of the substrate on the first stage by the mark detection system (alignment operation) can be performed in parallel with each other. Using one stage, substrate exchange and mark detection (alignment) It is expected that the throughput will be improved as compared with the case where the exposure operation is performed sequentially.
- an exposure apparatus for supplying a liquid between a projection optical system and a substrate, and exposing the substrate with an energy beam through the projection optical system and the liquid.
- the liquid is movable within a predetermined range including a first area directly below the projection optical system to which the liquid is supplied and a second area located on one side of the first area in the first axis direction.
- a second stage used to drive the first and second stages and from a first state in which one stage is located in the first region to a second stage in which the other stage is located in the first region.
- the first stage and the second stage are in the first axial direction.
- one stage changes from the first state located in the first area directly below the projection optical system to which the liquid is supplied to the second state located in the other area in the first area.
- the first and second stages When the first and second stages are moved in the first axis direction by the stage drive system, the first and second stages maintain either the close state or the contact state in the first axis direction. Driven. For this reason, while the liquid is being held between the projection optical system and at least one stage immediately below the projection optical system, liquid leakage from the gap between the first stage and the second stage is prevented or suppressed. It is possible to make a transition from the first state to the second state. That is, after an exposure operation is performed on the substrate on the first stage through the projection optical system and the liquid, measurement is started immediately below the projection optical system using the second stage.
- the liquid is held between the first stage and the projection optical system, and the liquid is held between both stages and the projection optical system. It is possible to make a transition to a state in which the liquid is held between the projection optical system and the liquid, without going through the steps of total recovery and resupply of the liquid. The same applies to the end of the measurement by the second stage and the start of the exposure by the first stage. Therefore, measurement operation using the second stage after the exposure operation on the substrate on the first stage and exposure operation on the substrate on the first stage after the measurement using the second stage are started in a short time It is possible to improve the throughput.
- the liquid is always present on the image plane side of the projection optical system, it is possible to effectively prevent the above-described water stain (water mark) from being generated on the optical member on the image plane side of the projection optical system. be able to .
- the exposure operation of the substrate using the first stage and the measurement operation using the second stage can be performed in parallel depending on the measurement operation.
- an exposure apparatus for supplying a liquid between a projection optical system and a substrate and exposing the substrate via the projection optical system and the liquid,
- a first stage movable within a predetermined range including a first region directly below the projection optical system to which the liquid is supplied and a second region located on one side of the first region in a first axial direction;
- a second stage movable independently of the first stage in an area including the first area and the second area; and driving the first and second stages, When the stage transitions from the first state located in the first area to the second state located in the first area, the first stage and the second stage are connected to the first state. In the second axis direction that intersects the axial direction, the force in either the close state or the contact state is maintained.
- a stage drive system for simultaneously driving the first and second stages in the second axis direction.
- the first state in which one stage is located in the first area immediately below the projection optical system to which the liquid is supplied is changed to the second state in which the other stage is located in the first area.
- the first and second stages are brought into contact with each other by the stage drive system, the first and second stages are close to or in contact with each other in the second axial direction (the direction intersecting the first direction in which the first and second regions are aligned). While maintaining this, the first and second stages are simultaneously driven in the second axis direction. For this reason, While the liquid is held between the shadow optical system and at least one stage immediately below the shadow optical system, the liquid is prevented from leaking from the gap between the first stage and the second stage, or It is possible to make a transition from the state 1 to the second state.
- the exposure operation of the substrate through the projection optical system and the liquid is started on the other stage side.
- the state in which the liquid is held between one stage and the projection optical system the state in which the liquid is held between both stages and the projection optical system, and then the other stage and the projection optical system It is possible to make a transition to a state in which the liquid is held between these steps without going through the steps of total recovery and resupply of the liquid. Therefore, after the exposure operation on the substrate on one stage is completed, the exposure operation on the substrate on the other stage can be started in a short time, and the throughput can be improved. Further, since the liquid is always present on the image plane side of the projection optical system, it is necessary to effectively prevent the above-described water stain from being generated on the optical member on the image plane side of the projection optical system. Can be.
- the present invention is an exposure apparatus that supplies a liquid between a projection optical system and a substrate, and exposes the substrate via the projection optical system and the liquid,
- a first stage movable in a region including a first region directly below the projection optical system to which the liquid is supplied and a region different from the first region; and a region different from the first region and the first region
- a second stage movable independently of the first stage in a region including: a first stage that drives the first and second stages and has one stage located in the first region; State force When the other stage transitions to the second state located in the first area, the first stage and the second stage maintain a state of being close to each other in a predetermined direction, and A stage drive system for simultaneously driving the second stage in the predetermined direction;
- the first stage and the second stage are provided in at least one of the first stage and the second stage.
- one of the first and second stages movable in an area including the first area immediately below the projection optical system and an area different from the first area is located in the first area.
- the first stage transitions from the first state to the second state located in the first area
- the first stage and the second stage are brought close to each other in the first axial direction, and the suppression member provided at at least one of the first and second stages for suppressing leakage of the liquid is located in the gap between the two stages. Since the liquid crystal display is simultaneously driven in the predetermined direction in the state where the liquid flows, it is possible to minimize leakage of liquid from between the two stages when the state transits from the first state to the second state.
- the substrate is exposed to the energy beam using each of the first to fourth exposure apparatuses of the present invention, so that the device pattern can be accurately transferred onto the substrate.
- the present invention can be said to be a device manufacturing method including a lithographic process of exposing a substrate with the energy beam using any of the first to fourth exposure apparatuses of the present invention.
- FIG. 1 is a schematic diagram showing an exposure apparatus according to a first embodiment.
- FIG. 2 is a plan view showing the wafer stage device according to the first embodiment.
- FIG. 3 is a perspective view showing a wafer stage WST1 of FIG. 2.
- FIG. 4 is a schematic plan view showing a liquid supply / discharge mechanism.
- FIG. 5 is a block diagram showing a main configuration of a control system of the exposure apparatus according to the first embodiment.
- FIG. 6 is a diagram (part 1) for describing a method of driving two wafer stages in a parallel processing operation.
- FIG. 7 is a diagram (part 2) for describing a method of driving two wafer stages in a parallel processing operation.
- FIG. 8 is a diagram (part 3) for explaining a method of driving two wafer stages in the parallel processing operation.
- FIG. 9 is a diagram (part 4) for explaining a method of driving two wafer stages in the parallel processing operation.
- FIG. 10 is a view showing an elastic seal member.
- FIG. 11 is a block diagram showing a main configuration of a control system of an exposure apparatus according to a second embodiment.
- FIG. 12 is a plan view showing a wafer stage device according to a second embodiment.
- Garden 13 (A)] is a view (No. 1) for describing a method of driving two wafer stages in the parallel processing operation according to the second embodiment.
- FIG. 13 (B)] is a view (No. 1) for explaining a method of driving the two wafer stages in the parallel processing operation according to the second embodiment.
- FIG. 14 (A)] is a view (No. 2) for describing a method of driving the two wafer stages in the parallel processing operation according to the second embodiment.
- FIG. 14 (B)] is a view (No. 2) for explaining the method of driving the two wafer stages in the parallel processing operation according to the second embodiment.
- FIG. 15 (A)] is a view (No. 3) for explaining the method of driving the two wafer stages in the parallel processing operation according to the second embodiment.
- FIG. 16 is a plan view showing a wafer stage device according to a third embodiment.
- FIG. 17 (B)] is a view (No. 1) for explaining a method of driving the wafer stage and the measurement stage in the parallel processing operation according to the third embodiment.
- FIG. 18 (B)] is a drawing (part 2) for explaining the method of driving the wafer stage and the measurement stage in the parallel processing operation according to the third embodiment.
- FIG. 19 (A)] is a view for explaining a modification of the suppressing member.
- FIG. 19 (B)] is a view for explaining a modification of the suppression member.
- FIG. 19 (C) is a view illustrating a modified example of the suppressing member.
- Garden 20 is a plan view showing a wafer stage device according to a fourth embodiment.
- Garden 21 is a diagram showing a state in which the wafer stage and the measurement stage are close to each other.
- FIG. 22 (A)] is a view (No. 1) for explaining a method of driving the wafer stage and the measurement stage in the parallel processing operation according to the fourth embodiment.
- FIG. 22 (B) is a view for explaining a method of driving the wafer stage and the measurement stage in the parallel processing operation according to the fourth embodiment (part 1).
- FIG. 23 (A) is a drawing (part 2) for explaining the method of driving the wafer stage and the measurement stage in the parallel processing operation according to the fourth embodiment.
- FIG. 23 (B) is a view for explaining a method of driving the wafer stage and the measurement stage in the parallel processing operation according to the fourth embodiment (part 2).
- FIG. 24 is a view (No. 1) for describing a modified example of the fourth embodiment.
- FIG. 25 (A) is a drawing (part 2) for describing a modification of the fourth embodiment.
- FIG. 25 (B) is a view (No. 2) for describing a modification of the fourth embodiment.
- FIG. 26 is a flowchart illustrating a device manufacturing method according to the present invention.
- FIG. 27 is a flowchart showing a specific example of step 204 in FIG. 26.
- FIG. 1 shows a schematic configuration of an exposure apparatus 100 according to the first embodiment.
- the exposure apparatus 100 is a step-and-scan projection exposure apparatus, that is, a so-called scanning Jung stepper (also called a scanner).
- the exposure apparatus 100 includes an illumination system 10, a reticle stage RST for holding a reticle R as a mask, a projection unit PU, a wafer stage apparatus 50 having wafer stages WST1 and WST2, and first and second mark detection systems. All of the Opaxis alignment systems ALG1, ALG2 and their control systems are provided.
- a wafer as a substrate is mounted on wafer stages WST1 and WST2. In FIG. 1, the wafer W1 is mounted on the wafer stage WST1, and the wafer W2 is mounted on the wafer stage WST2.
- the illumination system 10 includes a light source, an optical integrator, and the like as disclosed in, for example, JP-A-2001-313250 and US Patent Application Publication No. 2003/0025890 corresponding thereto. It is configured to include an illuminance uniforming optical system, a beam splitter, a relay lens, a variable ND filter, a reticle blind, etc.
- a slit-shaped illumination area on a reticle R defined by a reticle blind is used.
- the area is illuminated with illumination light (exposure light) IL as an energy beam with substantially uniform illuminance.
- illumination light IL an ArF excimer laser light (wavelength 193 nm) is used as an example.
- the illumination system 10 may adopt a configuration disclosed in, for example, JP-A-6-349701 and the corresponding US Pat. No. 5,534,970. To the extent permitted by the national laws of the designated country (or selected elected country) designated in this international application, the description of this specification has been incorporated by reference to the above publications and the corresponding U.S. patent application publications or U.S. patents. Part of
- a reticle having a circuit pattern or the like formed on its pattern surface (the lower surface in FIG. 1) is fixed, for example, by vacuum suction.
- the reticle stage RST is aligned with the optical axis of the illumination system 10 (the optical axis AX of the projection optical system PL to be described later) by a reticle stage drive unit 11 (not shown in FIG. 1 but see FIG. 5) including a linear motor, for example. ), And can be driven at a scanning speed specified in a predetermined scanning direction (here, the Y-axis direction, which is orthogonal to the paper surface in FIG. 1). .
- the position of the reticle stage RST in the stage movement plane is determined by a reticle laser interferometer (hereinafter, referred to as “reticle interferometer”) 116 through a movable mirror 15 with a resolution of, for example, about 0.5 nm.
- reticle interferometer a reticle laser interferometer
- a Y moving mirror having a reflecting surface orthogonal to the Y axis direction and an X moving mirror having a reflecting surface orthogonal to the X axis direction are provided, and these moving mirrors are provided. Forces provided with a reticle Y interferometer and a reticle X interferometer corresponding to Fig.
- reticle stage RST may be mirror-finished to form a reflection surface (corresponding to the reflection surface of the above-described X movable mirror and Y movable mirror).
- at least one corner cube type mirror (for example, a retroreflector) is used instead of the reflecting surface extending in the X-axis direction used for detecting the position of the reticle stage RST in the running direction (Y-axis direction in the present embodiment). Good to use ,.
- the reticle Y interferometer is a two-axis interferometer having two measurement axes.
- rotation in the rotation direction around the ⁇ axis can be measured.
- the measured value of reticle interferometer 116 is sent to main controller 20 (not shown in FIG. 1, see FIG. 5), and main controller 20 uses reticle stage based on the measured value of reticle interferometer 116.
- the position (and speed) of reticle stage RST is controlled by calculating the position of RST in the X, ⁇ , and ⁇ ⁇ directions and controlling reticle stage drive section 11 based on the calculation result.
- a TTR light-emitting diode having an exposure wavelength for simultaneously observing the reticle mark on the reticle R and the corresponding reference mark on the reference mark plate via the projection optical system PL is used.
- a pair of reticle alignment detection systems RAa and RAb are provided at predetermined distances in the X-axis direction.
- these reticle alignment detection systems RAa and RAb those having the same configuration as those disclosed in, for example, JP-A-7-176468 and corresponding US Pat. No. 5,646,413 are used. ing. To the extent permitted by the national laws of the designated States (or selected elected States) specified in this International Application, the disclosures in the above publications and corresponding US patents are incorporated herein by reference.
- the projection unit PU is arranged below the reticle stage RST in FIG.
- the projection unit PU includes a lens barrel 40 and a projection optical system PL composed of a plurality of optical elements held in a predetermined positional relationship within the lens barrel 40.
- a projection optical system PL for example, a refraction optical system including a plurality of lenses (lens elements) having a common optical axis AX in the Z-axis direction is used.
- the projection optical system PL has a predetermined projection magnification (for example, 1/4 times, 1Z5 times, or 1Z8 times), for example, both-side telecentric.
- the illumination area of the reticle R is illuminated by the illumination light IL from the illumination system 10
- the illumination area IL that has passed through the reticle R is transmitted through the projection unit PU (projection optical system PL).
- a reduced image of the circuit pattern of the reticle R (a reduced image of a part of the circuit pattern) is formed on a wafer having a surface coated with a resist (photosensitive agent).
- the aperture on the reticle side increases with the numerical aperture NA substantially increasing. Become. For this reason, it is difficult for the refractive optical system including only the lens to satisfy the Petzval condition, and the projection optical system tends to be large.
- a catadioptric system including a mirror and a lens may be used.
- the lens closest to the image plane (wafer side) constituting the projection optical system PL is the lens closest to the image plane (wafer side) constituting the projection optical system PL
- tip lens Liquid supply for locally supplying liquid between 91 and the wafer on wafer stage WST1 or WST2 (or between tip lens 91 and wafer stage WST1 or WST2)
- An exhaust system 32 is provided.
- a nozzle constituting the liquid supply / discharge unit is representatively shown as a liquid supply / discharge system 32. The configuration and the like of the liquid supply / discharge system 32 will be described later.
- the wafer stage device 50 includes a base board 12, a wafer stage WST1 and WST2 arranged above the upper surface of the base board 12, and an interferometer 18 for measuring the positions of the wafer stages WST1 and WST2. And an interferometer system 118 (see FIG. 5) as a position measuring device including a wafer stage WST1 and a wafer stage driving unit 124 (see FIG. 5) for driving the wafer stages WST2 and WST2.
- non-contact bearings for example, vacuum preload-type aerostatic bearings (hereinafter, referred to as "air pads") are provided at a plurality of locations.
- the wafer stages WST1 and WST2 float above the upper surface of the base plate 12 in a non-contact manner via a clearance of about several ⁇ above the upper surface of the base plate 12 due to the static pressure of the pressurized air ejected from the air pad toward the upper surface of the base plate 12.
- the wafer stages WST1 and WST2 can be driven in two-dimensional directions independently by the wafer stage drive unit 124 in the X-axis direction (the horizontal direction in the plane of FIG. 1) and the Y-axis direction (the direction perpendicular to the plane of FIG. 1). It is composed of
- a pair of X-axis linear guides 86 and 87 as X stators extending in the X-axis direction are arranged at predetermined intervals in the Y-axis direction.
- These X-axis linear guides 86 and 87 are formed, for example, by a magnetic pole unit incorporating a permanent magnet group consisting of a plurality of sets of N-pole magnets and S-pole magnets arranged at predetermined intervals and alternately along the X-axis direction. It is configured.
- the sliders 82, 84 and 83, 85 are provided in a non-contact manner surrounding the corresponding X-axis linear guides 86, 87 from above. That is, a total of four sliders 82, 84, 83, 85 have an inverted U-shaped cross section surrounding the X-axis linear guide 86 or 87 from above and from the side, and the corresponding X-axis linear guide 86 or 87 87 is floated and supported via an air pad (not shown), for example, with a clearance of about several xm.
- Each of the sliders 82, 84, 83, and 85 is configured by an armature unit that incorporates an armature coil disposed at a predetermined interval along the X-axis direction, for example. That is, in the present embodiment, the moving coil type X-axis linear motor is constituted by the sliders 82 and 84 formed of the armature unit and the X-axis linear guide 86 formed of the magnetic pole unit. Similarly, moving slider type X-axis linear motors are constituted by the sliders 83 and 85 and the X-axis linear guide 87, respectively.
- each of the above four X-axis linear motors will be denoted by the same reference numerals as the sliders 82, 84, 83, and 85 constituting the respective movers, and the X-axis linear motor 82 and the X-axis linear motor will be appropriately designated.
- the motor 84, the X-axis linear motor 83, and the X-axis linear motor 85 shall be referred to.
- the sliders constituting the two X-axis linear motors 82 and 83 are each provided with one end in the longitudinal direction of a Y-axis linear guide 80 as a Y stator extending in the Y-axis direction. Each is fixed to the other end. Further, the sliders constituting the remaining two X-axis linear motors 84, 85 are fixed to one end and the other end of a Y-axis linear guide 81 as a Y stator extending in the Y-axis direction. Accordingly, the Y-axis linear guides 80 and 81 are driven along the X-axis by a pair of X-axis linear motors 82, 83, 84 and 85, respectively.
- Each of the Y-axis linear guides 80 and 81 is constituted by, for example, an armature unit having a built-in armature coil disposed at a predetermined interval along the Y-axis direction.
- One Y-axis linear guide 81 is provided in a state of being inserted into an opening formed in wafer stage WST1. Inside the opening of the wafer stage WST1, for example, a magnetic pole unit having a permanent magnet group consisting of a plurality of sets of N-pole magnets and S-pole magnets arranged at predetermined intervals and alternately along the Y-axis direction. Is provided. This magnetic pole unit and the Y-axis linear guide 81 move the wafer stage WST1 in the Y-axis direction.
- a magnet-type Y-axis linear motor is configured.
- the other ⁇ -axis linear guide 80 is provided in an inserted state in an opening formed in wafer stage WST2.
- ⁇ -axis linear motors 81 and ⁇ -axis linear motors 80 as appropriate, using the same reference numerals as the linear guides 81 and 80 constituting the respective stators. .
- the wafer stage drive unit 124 shown in FIG. 5 includes the X-axis linear motors 82 to 85 and the ⁇ -axis linear motors 80 and 81. Each of the linear motors constituting the wafer stage drive section 124 is controlled by the main controller 20 shown in FIG.
- each of wafer stages WST1 and WST2 has a force illustrated as a single stage.
- a stage body driven by ⁇ -axis linear motors 81 and 80, respectively It is mounted on the upper part of the stage body via a ⁇ ⁇ leveling drive mechanism (for example, voice coil motor), and rotates in the ⁇ axis direction and around the X axis ( ⁇ X direction) with respect to the wafer stage body.
- a wafer table relatively minutely driven in the rotation direction ( ⁇ y direction).
- a wafer holder HI for holding the wafer W1 by vacuum suction or the like is provided on the wafer stage WST1 (more precisely, on the wafer table).
- the wafer holder HI has a substantially square main body 70 in a plan view (when viewed from above) and an area where the wafer W1 is placed so as to overlap the main body 70 from above.
- four auxiliary plates 72a-72d arranged around the periphery of the vehicle. The surfaces of these auxiliary plates 72a and 72d are almost the same height as the surface of the wafer W1.
- the auxiliary plates 72a to 72d may be composed of one member.
- the projection optical system As long as the liquid Lq can be held on the image plane side of the PL, there may be a step between the wafer surface and the auxiliary plate surface.
- an X movable mirror 17X having a reflecting surface orthogonal to the X axis at one end (+ X side end) in the X axis direction is extended in the Y axis direction, and has one end in the Y axis direction. (+ Y side end) Y moving mirror with reflection surface orthogonal to Y axis.
- an interferometer beam length measuring beam
- an interferometer beam from an interferometer constituting an interferometer system 118 (see FIG. 5) described later is applied to each reflecting surface of these movable mirrors 17X and 17Y.
- each interferometer The reflected light is projected and received by each interferometer, so that a fixed mirror is placed at the reference position of each moving mirror reflection surface (generally, a fixed mirror is placed on the side of the projection unit PU or the side of the alignment system ALG1, and it is referred to as the reference surface. Is measured, and thereby the two-dimensional position of the wafer stage WST1 is measured. It is desirable that the upper surfaces of the movable mirrors 17X and 17Y are also approximately the same height (level) as the wafer W1.
- a gap D exists between each of the auxiliary plates 72a-72d and the wafer W1, and the dimension of the gap D is 0.1-lmm or less. It is set to be.
- the wafer W1 has a notch (a V-shaped notch) in a part thereof, but the notch is not illustrated because the size of the notch is about lmm.
- a circular opening is formed in a part of the auxiliary plate 72a, and a reference mark plate FM1 is fitted in the opening.
- the fiducial mark plate FM1 is almost flush with the surface force auxiliary plate 72a.
- a wafer holder H2 for holding the wafer W2 by vacuum suction or the like is provided on the wafer stage WST2 (more precisely, on the wafer table).
- the wafer holder H2 has the same configuration as the wafer holder HI described above. Therefore, a fiducial mark plate FM2 (not shown in FIG. 1, see FIG. 2) is fitted in a circular opening formed in a part of one auxiliary plate constituting the wafer holder H2.
- an X-moving mirror 117 having a reflecting surface orthogonal to the X-axis at one end (one X-side end) in the X-axis direction is extended in the SY-axis direction, and is extended in the Y-axis direction.
- a Y-moving mirror 117 having a reflecting surface perpendicular to the Y-axis is provided to extend in the Y-axis direction.
- an interferometer beam (length measuring beam) from an interferometer constituting an interferometer system 118 described later is projected onto each reflecting surface of these movable mirrors 117X and 117Y, and the reflected light is reflected from the interferometer beam.
- the light is received by each interferometer, and the displacement of each movable mirror reflecting surface from the reference position is measured, whereby the two-dimensional position of the wafer stage WST2 is measured.
- the end surfaces of wafer stages WST1 and WST2 may be mirror-finished to form reflection surfaces (corresponding to the reflection surfaces of movable mirrors 17X, 17Y, 117X, and 117Y described above).
- a sealing member 93 is attached to the surface of the wafer stage WST1 and WST2 facing each other, for example, the -X side surface of the wafer stage WST1, as shown in FIG. Have been.
- the seal member 93 for example, an elastic seal member made of a material such as fluoro rubber is used.
- a sealing member 93 may be attached to the + X side of wafer stage WST2, or the X side of wafer stage WST1 and the + X side of wafer stage WST2. It is okay to attach the seal member 93 to both.
- alignment system the above-mentioned Opacis' alignment system (hereinafter abbreviated as "alignment system”) ALG1 and AL G2 are located at the same distance from each other on the + X side and one X side of projection unit PU. Are arranged respectively. These alignment systems ALG1 and ALG2 are actually attached to a holding member that holds the projection unit PU. As these alignment systems ALG1 and ALG2, for example, a target band is irradiated with a broadband detection light beam that does not expose the resist on the wafer, and the image of the target mark formed on the light receiving surface by the reflected light from the target mark does not correspond to the image of the target mark.
- An image processing method that uses the image sensor (CCD, etc.) to capture images of the indices shown (indicator patterns on the index plates provided in the alignment systems ALG1 and ALG2) using an image sensor (CCD, etc.), and outputs those image signals.
- FIA Field Image Alignment
- the alignment system ALG1 and ALG2 are not limited to the FIA system, but irradiate the target mark with coherent detection light and detect scattered or diffracted light generated from the target mark, or generate from the target mark.
- An alignment sensor that detects two diffracted lights (for example, diffracted lights of the same order or diffracted in the same direction) by interference. It is, of course, possible to use singly or in combination as appropriate.
- the alignment system ALG1 is used for the position measurement of the alignment mark formed on the wafer W1 on the wafer stage WST1 and the reference mark formed on the reference mark plate FM1.
- the alignment system ALG2 is used for the position measurement of the alignment mark formed on the wafer W2 on the wafer stage WST2 and the reference mark formed on the reference mark plate FM2.
- the interferometer system 118 includes a projection axis (optical axis AX) of the projection optical system PL, alignment systems ALGl and ALG2, and a measurement axis parallel to the Y axis passing through the respective detection centers.
- the wafer stage WST1 is positioned in the region near the position just below the optical axis of the projection optical
- the position of the wafer stage WST1 is controlled by the X-axis interferometer 18 and the Y-axis interferometer 46.
- the coordinate system defined by the measurement axes of the X-axis interferometer 18 and the Y-axis interferometer 46 will be referred to as a first exposure coordinate system.
- the X-axis interferometer 16 and the Y-axis interferometer 46 The location of WST1 is managed.
- the coordinate system defined by the measurement axes of the X-axis interferometer 16 and the Y-axis interferometer 46 will be referred to as a second exposure coordinate system.
- wafer stage WST1 is located in a region (second region) near the position immediately below the detection center of alignment system ALG1, and the alignment mark formed on the wafer on wafer stage WST1 is detected.
- the position of wafer stage WST1 is managed by X-axis interferometer 18 and Y-axis interferometer 48.
- the coordinate system defined by the respective measurement axes of the X-axis interferometer 18 and the Y-axis interferometer 48 is referred to as a first alignment coordinate system.
- wafer stage WST2 is located in a region (third region) near a position immediately below the detection center of alignment system ALG2, and the alignment mark formed on the wafer on wafer stage WST2 is detected.
- the position of wafer stage WST2 is managed by X-axis interferometer 16 and Y-axis interferometer 44.
- the coordinate system defined by the measurement axes of the X-axis interferometer 16 and the Y-axis interferometer 44 is referred to as a second alignment coordinate system.
- the interferometer beams from the X-axis interferometers 18 and 16 always move the moving mirrors of the wafer stages WST1 and WST2 over the entire moving range of the wafer stages WST1 and WST2. 17X and 117X, respectively. Therefore, in the X-axis direction, the positions of the wafer stages WST1 and WST2 are controlled by the X-axis interferometers 18 and 16 at the time of exposure using the projection optical system PL and at the time of using the alignment systems ALG1 and ALG2. Is done.
- These X-axis interferometers 18 and 16 are multi-axis interferometers having at least three optical axes separated in the Y-axis direction and Z-axis direction, and the output value of each optical axis can be measured independently. ing. Therefore, in these X-axis interferometers 18, 16, in addition to measuring the position of wafer stages WST1 and WST2 in the X-axis direction, the rotation amount around the Y-axis (rolling amount) and the rotation amount around the Z-axis (jowing) Volume) can be measured.
- the Y-axis interferometers 44, 46, and 48 are, for example, two-axis interferometers each having two optical axes separated in the Z-axis direction, and the output value of each optical axis can be measured independently. It's like that. Therefore, these Y-axis interferometers 44, 46, and 48 can measure the amount of rotation (pitching amount) around the X-axis in addition to measuring the position of wafer stage WST1 or WST2 in the Y-axis direction.
- the above-described multi-axis interferometer is tilted by 45 °, and is reflected on a pedestal (not shown) on which projection optical system PL is mounted via reflection surfaces provided on wafer stages WST1 and WST2.
- the surface may be irradiated with a laser beam to detect relative position information in the optical axis direction (Z-axis direction) of the projection optical system PL.
- the drainage system 32 includes a liquid supply device 5, a liquid recovery device 6, supply pipes 21, 22, 27, 28 connected to the liquid supply device 5, and recovery tubes 23, 24, 29, connected to the liquid recovery device 6. 30 mag.
- the liquid supply device 5 includes a liquid tank, a pressure pump, a temperature control device, and a supply pipe.
- It is configured to include a plurality of valves for controlling the supply and stop of the liquid to each of 21, 22, 27 and 28.
- each valve for example, it is desirable to use a flow control valve so that not only the supply of the liquid is stopped but also the flow is adjustable.
- the temperature controller adjusts the temperature of the liquid in the liquid tank to a temperature substantially equal to the temperature in a chamber (not shown) in which the exposure apparatus main body including, for example, the projection unit PU or the like is housed.
- the supply pipe 21 has one end connected to the liquid supply device 5, the other end branched into three, and supply nozzles 21a, 21b, and 21c each having a tapered nozzle formed at each branch end. (Or provided).
- the tips of the supply nozzles 21a, 21b, and 21c are located in the vicinity of the above-mentioned tip lens 91 (see FIG. 1), are spaced apart in the X-axis direction by a predetermined distance, and are exposed in the exposure area IA (the above-described illumination area on the slit). (The area on the image plane conjugate to the image plane) is located close to the + Y side.
- the supply nozzles 21b and 21c are arranged substantially symmetrically about the supply nozzle 21a.
- the supply pipe 22 has one end connected to the liquid supply device 5 and the other end branched into three, and supply nozzles 22a, 22b, and 22c formed of tapered nozzles are formed at each branch end. (Or provided).
- the tips of the supply nozzles 22a, 22b, and 22c are located near the tip lens 91, and are arranged at a predetermined interval in the X-axis direction and close to one Y side of the exposure area IA.
- the supply nozzles 22a, 22b, and 22c are arranged to face the supply nozzles 21a, 21b, and 21c with the exposure area IA interposed therebetween.
- the supply pipe 27 has one end connected to the liquid supply device 5 and the other end formed (or provided) with a supply nozzle 27a having a tapered nose.
- the tip of the supply nozzle 27a is located near the tip lens 91, and is arranged close to the 1X side of the exposure area IA.
- the supply pipe 28 has one end connected to the liquid supply device 5 and the other end tapered.
- a power supply nozzle 28a is formed (or provided). The tip of the supply nozzle 28a is located near the tip lens 91, close to the + X side of the exposure area IA, and opposed to the supply nozzle 27a across the exposure area IA.
- the tank for supplying the liquid, the pressurizing pump, the temperature control device, the valve, and the like do not need to be all provided in the exposure apparatus 100. At least a part of the factory where the exposure apparatus 100 is installed is not necessary. It can also be replaced by such equipment.
- the liquid recovery device 6 is configured to include a liquid tank and a suction pump, and a plurality of valves for controlling the recovery and stop of the liquid via the recovery pipes 23, 24, 29, and 30, respectively. ing. As each valve, it is desirable to use a flow control valve corresponding to the valve on the side of the liquid supply device 5 described above.
- the collection pipe 23 has one end connected to the liquid collection device 6 and the other end branched into two branches, and collection branches 23 a and 23 b formed of divergent nozzles are formed (or provided) at each branch end. Is).
- the recovery nozzles 23a and 23b are alternately arranged between the supply nozzles 22a to 22c.
- the tip of each of the collecting nozzles 23a and 23b and the tip of each of the supply nozzles 22a, 22b and 22c are arranged substantially on the same straight line parallel to the X axis.
- the recovery pipe 24 has one end connected to the liquid recovery device 6 and the other end bifurcated to form (or provide) recovery nozzles 24a and 24b formed of divergent nozzles at each branch end. Is).
- the collecting nozzles 24a and 24b are arranged alternately between the supply nozzles 21a to 21c and opposed to the collecting nozzles 23a and 23b with the exposure area IA interposed therebetween.
- the tip of each of the recovery nozzles 24a and 24b and the tip of each of the supply nozzles 21a, 21b and 21c are arranged substantially on the same straight line parallel to the X axis.
- the collection pipe 29 has one end connected to the liquid collection device 6 and the other end branched into two branches, and collection branches 29a and 29b formed of divergent nozzles are formed (or provided) at each branch end. Is). These collecting cuts 29a and 29b are arranged so as to sandwich the supply cut 28a. The tip of each of the collecting nozzles 29a and 29b and the supplying nozzle 28a is arranged substantially on the same straight line parallel to the Y axis.
- the recovery pipe 30 has one end connected to the liquid recovery device 6 and the other end bifurcated. Each branch end is formed (or provided) with a recovery nozzle 30a, 30b formed of a divergent nozzle at each branch end.
- the collecting nozzles 30a and 30b are arranged opposite to the collecting nozzles 29a and 29b with the supply nozzle 27a interposed therebetween and the exposure area IA therebetween.
- the tip of each of the collecting nozzles 30a and 30b and the supply nozzle 27a is disposed substantially on the same straight line parallel to the Y axis.
- the tank for collecting the liquid, the suction pump, the valve, and the like be all provided in the exposure apparatus 100, and at least a part of the tank is replaced with equipment such as a factory in which the exposure apparatus 100 is installed. You can also.
- ultrapure water (hereinafter, simply referred to as “water” unless otherwise required) through which ArF excimer laser light (light having a wavelength of 193 nm) passes is used. Shall be assumed.
- Ultrapure water has the advantage that it can be easily obtained in large quantities at semiconductor manufacturing plants and the like, and that it has no adverse effect on the resist (photosensitizer) or optical lens applied on the wafer. In addition, since ultrapure water has no adverse effect on the environment and has an extremely low impurity content, an effect of cleaning the surface of the wafer and the surface of the tip lens 91 can be expected.
- the refractive index n of water with respect to ArF excimer laser light is approximately 1.44.
- the liquid supply device 5 and the liquid recovery device 6 each include a controller, and each controller is controlled by the main controller 20 (see FIG. 5). For example, when the wafer W1 (or W2) is moved in the direction indicated by the solid arrow A in FIG. 4 (one Y direction), the controller of the liquid supply device 5 supplies the wafer W1 in response to an instruction from the main controller 20.
- the valve connected to the pipe 21 is opened at a predetermined opening, the other valves are fully closed, and the tip lens 91 and the wafer W1 (or W2) are connected through the supply nozzles 21a-21c provided in the supply pipe 21. Water is supplied in the Y direction in between.
- the controller of the liquid recovery device 6 opens the valve connected to the recovery pipe 23 at a predetermined opening, fully closes the other valves, and recovers the recovery noise. Water is collected into the liquid recovery device 6 from between the tip lens 91 and the wafer W1 (or W2) via 23a and 23b. At this time, main controller 20 determines the amount of water to be supplied in the Y direction from supply nozzles 21a and 21c between tip lens 91 and wafer W1 (or W2), and collection nozzles 23a and 2a. A command is given to the liquid supply device 5 and the liquid recovery device 6 so that the amount of water recovered via 3b is always equal. Therefore, a certain amount of water Lq (see FIG. 1) is held between the tip lens 91 and the wafer W1 (or W2). In this case, the water Lq held between the tip lens 91 and the wafer W1 (or W2) is constantly replaced.
- the controller of the liquid supply device 5 issues an instruction from the main controller 20.
- the valve connected to the supply pipe 22 is opened at a predetermined opening degree, the other valves are fully closed, and the front lens 91 and the wafer W1 (or) are supplied through the supply nozzles 22a and 22c provided in the supply pipe 22. Water is supplied in the + Y direction between W2).
- the controller of the liquid recovery device 6 opens the valve connected to the recovery pipe 24 at a predetermined opening, fully closes the other valves, and sets the recovery nozzle 24a.
- the water is collected into the liquid collecting device 6 from between the tip lens 91 and the wafer W1 (or W2).
- the main controller 20 controls the amount of water supplied from the supply nozzles 22a to 22c in the + Y direction between the tip lens 91 and the wafer W1 (or W2) and the recovery nozzles 24a and 24b.
- a command is given to the liquid supply device 5 and the liquid recovery device 6 so that the amount of water recovered through the system is always equal. Therefore, a certain amount of water Lq (see FIG. 1) is held between the tip lens 91 and the wafer W1 (or W2). In this case, the water Lq held between the tip lens 91 and the wafer W1 (or W2) is constantly replaced.
- the supply nozzle group and the collection nozzle group that form a pair are provided on one side and the other side in the Y-axis direction with the exposure area IA interposed therebetween. Regardless of whether the wafer is moved in the + Y direction or the one Y direction, the space between the wafer W1 (or W2) and the front lens 91 is stably filled with water. In other words, even in the case of the so-called plus scan and minus scan, the water can be stably held between the tip lens 91 and the wafer.
- the controller of the liquid supply device 5 When moving the wafer W 1 (or W 2) in the direction (+ X direction) indicated by the solid arrow B in FIG. 4, the controller of the liquid supply device 5 In accordance with the instruction, the valve connected to the supply pipe 27 is opened at a predetermined opening, the other valves are fully closed, and the tip lens 91 and the wafer W1 (or W2) are supplied through the supply nozzle 27a provided in the supply pipe 27. ) And supply water in the + X direction. At this time, the controller of the liquid recovery device 6 opens the valve connected to the recovery pipe 29 at a predetermined opening in accordance with an instruction from the main control device 20 and fully closes the other valves to thereby collect the recovery noise.
- Water is recovered into the liquid recovery device 6 from between the front end lens 91 and the wafer W1 (or W2) via 29a and 29b.
- main controller 20 determines the amount of water supplied from supply nozzle 27a between tip lens 91 and wafer W1 (or W2), and the amount of water collected through collection nozzles 29a and 29b.
- a command is given to the liquid supply device 5 and the liquid recovery device 6 so that the values are equal. Therefore, a certain amount of water Lq (see FIG. 1) is held between the tip lens 91 and the wafer W1 (or W2). In this case, the water Lq held between the tip lens 91 and the wafer W1 (or W2) is constantly replaced.
- the controller of the liquid supply device 5 When moving the wafer W 1 (or W 2) in the direction (1 X direction) indicated by the dotted arrow B ′ in FIG. 4, the controller of the liquid supply device 5 In response to the instruction, the valve connected to the supply pipe 28 is opened at a predetermined opening degree, the other valves are fully closed, and the front lens 91 and the wafer W1 (or) are supplied through the supply nozzle 28a provided in the supply pipe 28. W2) and supply water in the X direction. In addition, at this time, the controller of the liquid recovery device 6 opens the valve connected to the recovery pipe 30 at a predetermined opening in accordance with an instruction from the main control device 20, fully closes the other valves, and collects the recovery noise.
- Water is recovered inside the liquid recovery device 6 from between the tip lens 91 and the wafer W1 (or W2) via 30a and 30b.
- main controller 20 determines the amount of water supplied from supply nozzle 28a between tip lens 91 and wafer W1 (or W2), and the amount of water collected through collection nozzles 30a and 30b. Is equal to Command is given to the liquid supply device 5 and the liquid recovery device 6 as described above. Therefore, a certain amount of water Lq (see FIG. 1) is held between the tip lens 91 and the wafer W1 (or W2). In this case, the water Lq held between the tip lens 91 and the wafer W1 (or W2) is constantly replaced.
- a nozzle that supplies and collects water from the X-axis direction or the Y-axis direction for example, a nozzle that supplies and collects water from an oblique direction may be provided.
- the supply nozzles 21a-21c, 22a-22c, 27a, 28a continue to supply the night body Lq, and the collection nozzles 23a, 23b, 24a, 24b, 29a, 29b, 30 Liquid Lq may be continuously collected from a and 30b.
- liquid supply / discharge system is not limited to the above-described embodiment of FIG. 4, and various embodiments can be applied as long as the liquid immersion area can be formed on the image plane side of the projection optical system PL.
- a holding member (not shown in FIG. 1) for holding projection unit PU further includes irradiation system 90a (not shown in FIG. 1, see FIG. 5) and light receiving system 90b (not shown in FIG. 1).
- FIG. 5 for example, the oblique incidence type multipoint focal position detection similar to that disclosed in Japanese Patent Application Laid-Open No. 6-283403 and the corresponding US Pat. No. 5,448,332.
- An outgoing system is provided.
- the irradiation system 90a is turned on and off by the main controller 20 in Fig. 5.
- the light source has a controlled light source, and emits a light beam for forming images of a large number of pinholes or slits toward an image forming plane of the projection optical system PL.
- the emitted light beam is applied to the wafer surface obliquely with respect to the optical axis AX via a prism (not shown) provided in the barrel of the projection unit PU (part of the optical system in the irradiation system 90a).
- the reflected luminous flux of those luminous fluxes reflected on the wafer surface is reflected by another prism (not shown) provided in the lens barrel of the projection unit PU (a part of the optical system in the light receiving system 90b). The light is received by the light receiving element in the light receiving system 90b.
- the out-of-focus signal (defocus signal) which is the output of the light receiving system 90b of the focus position detection system (90a, 90b) is supplied to the main controller 20.
- Main controller 20 rotates the Z position and ⁇ X, ⁇ y rotation of the wafer surface based on a defocus signal (defocus signal) from light receiving system 90b, for example, an S-force signal at the time of scanning exposure to be described later. Is calculated, and the wafer stage drive unit 124 is adjusted so that the calculated Z position of the wafer surface and ⁇ X, ⁇ y rotation have a zero difference with respect to their target values, that is, a defocus of zero.
- the focus position detection system may detect the position information on the wafer surface via a liquid, or may detect the position information without using a liquid. Further, the focus position detection system is not limited to the one that detects the position information on the wafer surface on the image plane side of the projection optical system PL, and detects the position information on the wafer surface at a location away from the projection optical system PL. Even good.
- FIG. 5 shows a main configuration of a control system of exposure apparatus 100 of the present embodiment.
- This control system is mainly configured by a main controller 20 composed of a microcomputer (or a workstation) that controls the entire apparatus as a whole.
- a main controller 20 composed of a microcomputer (or a workstation) that controls the entire apparatus as a whole.
- main controller 20 uses interferometer 18, based on the result of a wafer alignment such as an enno, instrumental-global alignment (EGA) performed in advance, or the like. While monitoring the measured values of 46, the X-axis linear motors 84 and 85 and the Y-axis linear motor 81 are controlled to set the running start position (calo speed start position) for exposure of the first shot area of the wafer W1. Move wafer stage WST1. In this exposure sequence, the position of wafer stage WST1 is managed on the first exposure coordinate system.
- a wafer alignment such as an enno, instrumental-global alignment (EGA) performed in advance, or the like.
- ESA instrumental-global alignment
- main controller 20 starts relative movement of reticle R (reticle stage RST) and wafer W1 (wafer stage WST1) in the Y-axis direction. During this relative scanning, the main controller 20 monitors the measured values of the interferometers 18 and 46 and the reticle interferometer 116 described above and, while monitoring the measured values of the reticle stage drive unit 11 and the Y-axis linear motor 81 (and the X-axis linear motor). 84, 85).
- main controller 20 gives an instruction to a light source (ArF excimer laser device) (not shown) to start pulse emission. Then, when the two stages RST and WST1 reach the constant-speed synchronization state, the pattern area of the reticle R starts to be illuminated by the illumination light IL (ultraviolet pulse light) from the illumination system 10, and scanning exposure is started. Prior to the start of the scanning exposure, pulse light emission of the light source has been started as described above. However, the main controller 20 causes a predetermined blade of a movable reticle blind (not shown) in the illumination system 10 to rotate the reticle stage RST. In this way, unnecessary exposure of the wafer W1 is prevented from being performed before the start of scanning exposure.
- a light source ArF excimer laser device
- the main controller 20 allows the movable system in the illumination system 10 to be moved.
- a reticle blind (not shown) is moved in synchronization with reticle stage RST, thereby preventing unnecessary exposure of wafer W1.
- main controller 20 causes wafer stage WST 1 to move through X and Y axes via X-axis linear motors 84 and 85 and Y-axis linear motor 81. Then, it is moved to the acceleration start position (running start position) for exposure of the second shot area.
- main controller 20 measures the position displacement of wafer stage WST1 in the X, ⁇ , ⁇ directions in real time based on the measurement values of interferometers 18 and 46. Then, based on the measurement result, main controller 20 controls the position of wafer stage WST1 such that the vertical displacement of wafer stage WST1 is in a predetermined state.
- Main controller 20 also controls at least one of reticle stage RST (reticle fine movement stage) and wafer stage WST1 based on the information of the displacement of wafer stage WST1 in the ⁇ direction so as to compensate for the rotational displacement error on the wafer side. Control the rotation of one side.
- reticle stage RST reticle fine movement stage
- wafer stage WST1 wafer stage WST1 based on the information of the displacement of wafer stage WST1 in the ⁇ direction so as to compensate for the rotational displacement error on the wafer side. Control the rotation of one side.
- each unit is controlled by main controller 20 in the same manner as described above, and the same scanning exposure as described above is performed on the second shot area on wafer W1. Be done.
- the scanning exposure of the shot area on the wafer W1 and the stepping operation between shots for the next shot exposure are repeatedly performed, and the entire reticle R is exposed to the shot area to be exposed on the wafer W1.
- the patterns are sequentially transferred.
- the main controller 20 controls the liquid supply device 5 of the liquid supply / drainage system 32 according to a change in the moving direction of the wafer W 1. Needless to say, the opening and closing control of each valve of the liquid recovery device 6 is performed as described above. Therefore, during the above-described step “and” scan exposure operation on the wafer W1, a state where a constant amount of water is constantly held between the tip lens 91 and the wafer W1 is maintained.
- the main controller 20 controls the movement direction of the wafer stage located in the first area immediately below the projection unit PU.
- the opening / closing control of each valve of the liquid supply device 5 and the liquid recovery device 6 of the liquid supply / drainage system 32 is performed as described above, and water is always filled immediately below the tip lens 91 of the projection optical system PL. I have. However, in the following, description on control of the liquid supply device 5 and the liquid recovery device 6 will be omitted to facilitate the description.
- FIG. 2 shows that the wafer W1 on the wafer stage WST1 is exposed by the step-and-scan method as described above, and in parallel with this, an alignment system is provided on the wafer stage WST2 side. Wafer alignment for wafer W2 is performed in the third area below ALG2.
- the left loading position is defined as a position where the reference mark plate FM2 is located immediately below the alignment system ALG2.
- the main controller 20 resets the Y-axis interferometer 44 before the alignment system ALG2 detects the second fiducial mark on the fiducial mark plate FM2 in the left loading position.
- main controller 20 When detecting the second fiducial mark, main controller 20 captures an image of the second fiducial mark using alignment system ALG 2, performs a predetermined process on the image signal, and processes the image signal after the process. By analyzing this signal, the position of the second fiducial mark with reference to the index center of the alignment system ALG2 is detected. Further, main controller 20 determines the position of the second fiducial mark on the second alignment coordinate system based on the detection result of the position of the second fiducial mark and the measurement results of interferometers 16 and 44 at the time of the detection. Calculate the position coordinates.
- main controller 20 manages the position of wafer stage WST2 in the XY plane on the second alignment coordinate system described above, and uses alignment system ALG2 to specify a plurality of specific shots on wafer W2.
- position information position information relative to the detection center of the alignment ALG2
- the sample information on the second alignment coordinate system is detected. Find mark position information.
- main controller 20 determines the detection result and the design position of the specific shot area. Based on the target, statistical operations such as those disclosed in, for example, JP-A-61-22249 and the corresponding U.S. Pat. No.
- 4,780,617 are executed, and a plurality of shots on the wafer W2 are processed.
- main controller 20 subtracts the above-described position coordinates of the second reference mark from the position coordinates of the plurality of shot areas on wafer W2 on the second alignment coordinate system, thereby obtaining the positions of the plurality of shot areas.
- the coordinates are converted to position coordinates with the origin of the position of the second fiducial mark.
- wafer stage WST2 for which alignment has been completed enters a waiting state at a predetermined waiting position.
- main controller 20 starts moving wafer stages WST1 and WST2 toward predetermined positions shown in FIG. 6, respectively. .
- main controller 20 After moving wafer stages WST1 and WST2 to the positions shown in FIG. 6, main controller 20 starts the operation of simultaneously driving wafer stage WST1 and wafer stage WST2 in the + X direction. I do. In the state shown in FIG. 6, wafer stage WST1 and wafer stage WST2 are in contact with each other via elastic seal member 93 provided on wafer stage WST1.
- wafer stage WST1 and WST2 are simultaneously driven by main controller 20 in this manner, in the state of FIG. 6, wafer stage WST1 and WST2 are held between tip lens 91 of projection unit PU and wafer W1. As the wafer stages WST1 and WST2 move to the + X side, wafers Wl ⁇ wafer stage WST1 (more specifically, wafer holder HI) ⁇ wafer stage WST2, and more specifically, wafer holder H2) Moving. During the above-described movement, the wafer stages WST1 and WST2 maintain the positional relationship of being in contact with each other via the elastic seal member 93 as in the state of FIG.
- FIG 7 shows that water ( The state when the liquid immersion area) is simultaneously present on the wafer stages WST1 and WST2 (wafer holders H1 and H2), that is, the state immediately before water is passed from the wafer stage WST1 to the wafer stage WST2 is shown. You.
- the main controller 20 resets the Y-axis interferometer 46 at any point when the interferometer beam from the Y-axis interferometer 46 is irradiated on the movable mirror 117Y. .
- main controller 20 starts driving wafer stage WST1 toward the right-hand loading position shown in FIG.
- the right loading position is set at a position where the fiducial mark plate FM1 is located immediately below the alignment system LG1.
- main controller 20 controls illumination light IL by a pair of reticle alignment systems RAa and RAb (see FIG. 1).
- the relative position of the pair of first reference marks on the reference mark plate FM2 and the corresponding projected image of the reticle alignment mark on the reticle R on the wafer surface is detected.
- the images of the pair of first fiducial marks and reticle alignment marks on the fiducial mark plate FM2 are detected via the projection optical system PL and water.
- main controller 20 determines the detected relative position information, the position information of each shot area on wafer W2 with respect to the previously obtained second fiducial mark, the known first fiducial mark and the second fiducial mark. Based on the positional relationship with the reference mark, the relative positional relationship between the projection position of the reticle R pattern (the projection center of the projection optical system PL) and each shot area on the wafer W2 is calculated. Then, based on the calculation result, main controller 20 manages the position of wafer stage WST2 on the second exposure coordinate system and performs the step-and-scan The pattern of reticle R is transferred to each shot area on wafer W2 by.
- a wafer is exchanged with a wafer transfer system (not shown).
- the main controller 20 activates the alignment system ALG1.
- the second fiducial mark on the fiducial mark plate FM1 is used to detect the second fiducial mark.
- Main controller 20 resets Y-axis interferometer 48 prior to detection of the second fiducial mark.
- main controller 20 performs EGA using alignment system ALG1 on wafer W2 while managing the position of wafer stage WST1 on the first alignment coordinate system.
- main controller 20 repeatedly performs the above-described parallel operation with wafer stages WST1 and WST2.
- the Y-axis interferometer is reset when the interferometer beam from any of the Y-axis interferometers hits the moving mirror 17Y or 117Y. Is executed by the main controller 20.
- stage drive system is configured by the wafer stage drive unit 124. Also, this stage drive The system and the wafer stages WST1 and WST2 constitute at least a part of the stage apparatus.
- the stage apparatus included in the exposure apparatus, and the method of driving the wafer stages WST1 and WST2 executed by the exposure apparatus 100 the liquid (water) ) Is supplied from the first state in which one wafer stage WST1 (or WST2) is located in the first area including the position immediately below the projection unit PU (projection optical system PL).
- the stage driving system (124 or the like) maintains the state in which the wafer stages WST1 and WST2 are in contact with each other via the elastic seal member 93 in the X-axis direction. Wafer stages WST1 and WST2 are simultaneously driven in the X-axis direction.
- One wafer stage WST1 (or WST2) is located in the first area without water leaking from the gap between both wafer stages while water is supplied.
- the other wafer stage WST2 (or WST1) Can be changed to the second state located in the first area. That is, after the wafer is exposed through the projection optical system PL and water (liquid) on one wafer stage, the wafer is exposed on the other wafer stage through the projection optical system PL and water.
- the state where the wafer is held between one wafer stage and the projection optical system PL is changed to the state where water is held between the other wafer stage and the projection optical system PL.
- the time from the end of the exposure operation on one wafer stage side to the start of the exposure operation on the other wafer stage side is reduced (that is, a normal exposure apparatus other than the immersion exposure (non-immersion exposure). It is possible to improve the throughput by maintaining the same level as the device). Further, since water is always present on the image plane side of the projection optical system PL, optical members on the image plane side of the projection optical system PL (for example, the tip lens 91 and the prism of the multipoint focal position detection system described above). In addition, water spots can be effectively prevented from being generated, and the imaging performance of the projection optical system PL and the detection accuracy of the multi-point focal position detection system can be improved over a long period of time. The degree can be maintained satisfactorily.
- the pattern of reticle R can be accurately transferred onto a wafer. Transfer of a fine pattern of about 100 nm can be realized.
- no moving mirror for the interferometer is provided on one X side of wafer stage WST1 and the + X side of wafer stage WST2, so that both wafer stages approach in the X-axis direction.
- the positions of both wafer stages are simultaneously driven in the X-axis direction of both wafer stages. All the time, the water can be monitored by the interferometer system 118, and water can be suppressed from adhering to the reflecting surface of the moving mirror which is moved by force.
- FIG. 11 shows a configuration of a control system of the exposure apparatus of the second embodiment. Comparing FIG. 11 with FIG. 5, according to the second embodiment, a point force in which a wafer stage drive unit 124A is provided instead of the wafer stage drive unit 124 of the first embodiment described above. It can be seen that this is different from the first embodiment.
- a wafer stage device 50 ′ shown in FIG. 12 is provided instead of wafer stage device 50 described above.
- the wafer stage device 50 ' includes a base plate 12, a wafer stage WST1' and a wafer stage WST2 'arranged above the upper surface of the base plate 12 (on the front side in FIG. 12).
- six interferometers 151X, 151X, 151X, 151X, 151Y, 151Y as position measuring devices for measuring the positions of these wafer stages WST1 ', WST2', and Ueno stage WST1 '
- the interferometer system 118A of FIG. 11 is configured, and includes the first drive unit 171, the second drive unit 172, the first connection mechanism 195, and the second connection mechanism 196, and includes the wafer stage of FIG.
- the driving unit 124A is configured.
- the first drive unit 171 includes an X-axis linear motor 136X as a linear actuator that drives the wafer stage WST1 '(or WST2') in the X-axis direction, and a wafer stage WST1 '(or WST2'). And a pair of Y-axis linear motors 136Y and 136Y for driving the X-axis linear motor 136X integrally with the X-axis linear motor 136X in the scanning direction.
- the X-axis linear motor 136X includes an X-axis linear guide 181 as a stator having the X-axis direction as a longitudinal direction, and an X-movable element 179 moving in the X-axis direction along the X-axis linear guide 181. It has.
- the X-axis linear guide 181 is composed of an armature unit having a housing extending in the X-axis direction and a plurality of armature coils disposed inside the housing along the X-axis direction at predetermined intervals.
- a mover (Y mover) 184 of one Y-axis linear motor 136Y is fixed to one end of the X-axis linear guide 181 in the longitudinal direction (X-axis direction), and the other Y-axis linear motor is fixed to the other end.
- Motor 13 6Y mover (Y mover) 185 is fixed.
- the X mover 179 has, for example, a cylindrical shape that surrounds the X-axis linear guide 181 from all sides, and a mover yoke having an inverted U-shaped cross section is provided therein. .
- a plurality of permanent magnets and a plurality of permanent magnets are alternately arranged along the longitudinal direction. Therefore, an alternating magnetic field is formed in the internal space of the X mover 179 along the X-axis direction.
- the electromagnetic interaction between the X mover 179 and the X-axis linear guide 181 generates a driving force (Lorentz force) for driving the X mover 179 in the X-axis direction.
- the X-axis linear motor 136X is a moving magnet type electromagnetic motor-driven reflow motor.
- a first connection mechanism 195 (not shown in Fig. 12, see Fig. 11) for connecting wafer stage WST1 '(or WST2') is provided on the side surface of X mover 179.
- the first connection mechanism 195 for example, a mechanism utilizing magnetic attraction of an electromagnet, a mechanism for mechanically engaging the wafer stage WST1 '(or WST2'), or the like can be used.
- the main controller 20 controls the first connection mechanism 195 to connect the wafer stage WST1 '(or WST2') to the X mover 179, or cancels the connection.
- wafer stage WST1 ′ (or WST2 ′) is in a state of being cantilevered by X mover 179.
- FIG. 12 shows a state in which the X mover 179 supports the wafer stage WST1 ′ in a cantilever manner.
- the ⁇ -axis linear motor 136Y is a ⁇ -axis linear motor as a stator extending in the ⁇ -axis direction.
- a mover 184 that moves along the 184-axis linear guide 188.
- the ⁇ -axis linear guide 188 an armature unit configured similarly to the above-described X-axis linear guide 181 is used.
- the magnetic pole unit having the same shape as the above-mentioned X mover 179 is used as the mover 184 although it has an inverted U-shaped cross section.
- the ⁇ -axis linear motor 136Y is a moving magnet type
- the other ⁇ -axis linear motor 136Y is a ⁇ -axis linear motor as a stator extending in the ⁇ -axis direction.
- This Y-axis linear motor 136Y has a structure similar to that of the ⁇ -axis linear motor 136Y.
- step 12 By making the driving force generated in step 12 different, it is possible to control the rotation of the wafer stage WST1 ′ (or WST2 ′) about the ⁇ axis via the X-axis linear motor 36 °.
- the second drive section 172 is arranged on one side of the first drive section 171 in a substantially vertically symmetrical manner in the plane of FIG.
- the second drive section 172 is configured in the same manner as the first drive section 171. That is, the second driving section 172 is provided at one end of the X-axis linear guide 180 as an X-axis linear motor 138X as a linear actuator composed of the X-axis linear guide 180 and the X mover 178.
- ⁇ Movement provided at the other end of ⁇ -axis linear motor 138Y composed of mover 182 and ⁇ -axis linear guide 186
- 183Y axis linear motor 138Y composed of a child 183 and a ⁇ axis linear guide 187.
- FIG. 12 shows a state in which wafer stage WST2 ′ is connected to X movable element 178 and is cantilevered.
- the wafer stage WST1 ' is different from the stage main body constituting the wafer stage WST1 of the first embodiment described above in that a magnetic pole unit is not provided on the stage main body, and not shown on the upper surface of the stage main body.
- the wafer stage WST1 is provided with a wafer table similar to the wafer table provided through the tilt drive mechanism. On the upper surface of the wafer table, a + + movable mirror 47 ⁇ , a + ⁇ movable mirror 47 ⁇ , and a + ⁇ movable mirror 47 ⁇ are provided near the earth side end and the + ⁇ side end.
- Wafer stage WST2 ' has the same configuration as wafer stage WST1'.
- + Y movable mirror 49Y, -Y movable mirror 49Y, -X movable mirror 49X are provided near the soil Y side end and -X side end.
- An elastic seal member similar to the elastic seal member 93 shown in FIG. 10 is provided on at least one of the side surfaces (+ X side surfaces) that are not provided.
- an alignment system ALG as a mark detection system is provided at a predetermined distance on one Y side of projection optical system PL.
- the interferometer system 118A As shown in FIG. 12, the interferometer system 118A
- the two Y-axis interferometers 151Y, 151Y having a length measuring axis parallel to the Y-axis connecting the optical axis and the detection center of the alignment system ALG, and the interferometer 151Y at the projection center (optical axis) of the projection optical system PL of
- Two X-axis interferometers 15 IX, 151X each having a measuring axis parallel to the intersecting X-axis
- the four X-axis interferometers 151X—151X have small distances in the Y-axis and Z-axis directions.
- the amount of rotation around the Y-axis (rolling amount) and the amount of rotation around the Z-axis (jowing amount) can be measured.
- the two Y-axis interferometers 151Y and 151Y are, for example, two each separated in the Z-axis direction.
- wafer stage WST1 ' is positioned near the position immediately below the optical axis of projection optical system PL.
- wafer stage WST1 ' is positioned near the position immediately below the optical axis of projection optical system PL.
- the wafer wafer W1 in FIG. 12
- wafer stage WST1 ' In this case, wafer stage WST1 'is positioned near the position immediately below the optical axis of projection optical system PL.
- the position of the wafer stage WST1, within the ⁇ plane, is managed on the first exposure coordinate system defined by the respective measurement axes.
- wafer stage WST2 ' is positioned in the area near the position directly below the optical axis of projection optical system PL.
- wafer stage WST1 is located in a region (second region) near the position immediately below alignment system ALG, and alignment (EGA) for the wafer (wafer W1 in FIG. 12) on wafer stage WST1, is performed.
- alignment ESA
- the position of WST1 'in the XY plane is managed.
- wafer stage WST2 ' is located in a region (second region) near the position immediately below alignment system ALG, and alignment (EGA) for the wafer on wafer stage WST2 (wafer W2 in FIG. 12) is performed.
- the position of WST2 'in the XY plane is managed.
- the other components are configured in the same manner as the first embodiment including the liquid supply / drainage system 32.
- the main controller 20 controls the liquid supply device 5 and the liquid recovery device of the liquid supply / discharge system 32 according to the moving direction of the wafer stage located in the first area directly below the projection optical system PL.
- the opening / closing control of each valve of 6 is performed as described above, and the water immediately below the tip lens 91 of the projection optical system PL is always filled with water.
- the description of the control of the liquid supply device 5 and the liquid recovery device 6 will be omitted.
- the interferometer beam from the X-axis interferometer or the Y-axis interferometer does not hit the moving mirror, making it difficult to control the position of the wafer stage by the interferometer.
- the position of the wafer stage is managed by a linear encoder (not shown).
- an interferometer beam from a desired interferometer is moved by a moving mirror.
- the main controller 20 executes the reset of the interferometer at the time when the interferometer is hit.
- the description of the position measurement of the wafer stage by the linear encoder and the reset of the interferometer will be omitted.
- FIG. 12 shows that the wafer W1 placed on the wafer stage WST1 'is exposed by the step-and-scan method in the same manner as in the first embodiment, and in parallel with this.
- a state is shown in which the wafer alignment for the wafer W2 is being performed in the second area below the alignment system ALG.
- the above-described exposure operation on wafer W1 is performed by main controller 20 while controlling the position of wafer stage WST1 on the above-described first exposure coordinate system, while simultaneously controlling X-axis linear motor 136X and a pair of X-axis linear motors 136X.
- the wafer is controlled by driving the Y-axis linear motors 136Y and 136Y.
- Stage WST1 is performed while moving.
- a wafer is exchanged between a wafer transfer mechanism (not shown) and wafer stage WST2 ′ at a predetermined loading position.
- main controller 20 manages the position of wafer stage WST2 'in the XY plane on the second alignment coordinate system described above, and uses alignment system ALG to specify a specific plurality of positions on wafer W2.
- EGA electronic GAA
- the second error of the plurality of shot areas on the wafer W2 is detected.
- FIG. 12 shows a state at the time of detecting the position information of the sample mark.
- main controller 20 detects the position information of the second reference mark formed on reference mark plate FM2 on wafer stage WST2 ′ before and after the detection of the position information of the sample mark. Then, main controller 20 converts the previously obtained position coordinates of the plurality of shot areas on wafer W2 on the second alignment coordinate system into position coordinates using the position of the second reference mark as the origin.
- the movement of wafer stage WST2 'at the time of wafer alignment and the like is performed by the main control device 20 force X-axis linear motor 138X and a pair of Y-axis linear motors 138Y and 138Y.
- main controller 20 transmits the X-axis linear motor 138X and a pair of Y-axis linear motors 138Y and 138Y after the completion of the wafer alignment.
- main controller 20 controls X-axis linear motor 136X and a pair of Y-axis linear motors 136Y, 136.
- the wafer stage WST1 ' is moved to the position shown in FIG.
- the wafer stage WST1 ' is moved to the position shown in FIG.
- the exposure end position for wafer W1 is set near the position shown in FIG.
- main controller 20 controls X-axis linear motor 138X and a pair of Y-axis linear motors 138Y, 138Y.
- main controller 20 includes X-axis linear motor 136X and a pair of Y-axis linear motors 136Y and 136Y, and X-axis linear motor 138X and a pair of Y-axis linear motors 138Y and 138Y. 38Y is controlled to move wafer stage WST1 'and wafer stage WST2' in the + X direction.
- both wafer stages WST1 ′ and WST2 ′ are simultaneously moved in the + X direction from the state of FIG. 13 (B) in this manner, and the reference mark plate FM2 on wafer stage WST2 ′ is moved.
- the state where water is held between the region including the tip and the tip lens 91 is shown.
- main controller 20 controls the state of connection between X mover 179 and wafer stage WST1 ′ by first connection mechanism 195, and the state of X mover 178 and wafer stage WST2 ′ by second connection mechanism 196.
- first connection mechanism 195 controls the state of connection between X mover 179 and wafer stage WST1 ′ by first connection mechanism 195, and the state of X mover 178 and wafer stage WST2 ′ by second connection mechanism 196.
- the X mover 179 is slightly driven in the + Y direction and the X mover 178 is slightly driven in the one Y direction.
- FIG. 14B shows a state after the X movers 179 and 178 are driven.
- wafer stages WST1 ′ and WST2 ′ float above base plate 12 by air pads (not shown) provided on the bottom surfaces (1Z side). It is being supported.
- the present invention is not limited to this, and a support leg is provided on the wafer stage WST1 ′, WST2 ′ side or the base plate 12 side so that the wafer stage WST1 ′, WST2 ′ can be retracted and connected to the X movers 179, 178. It is also possible to stably support the wafer stages WS Tl ′ and WST2 ′ above the base plate 12 by the support legs just before the release.
- main controller 20 includes Y-axis linear motors 136Y and 136Y, and X-axis linear motors 136Y and 136Y.
- the X mover 179 is driven via X to move it to a position where it can be connected to the wafer stage WST2 ', and X is moved via Y-axis linear motors 138Y, 138Y and X-axis linear motor 138X.
- the mover 178 is driven and moved to a position where it can be connected to the wafer stage WST1 '. At this time, the position of each X mover is managed by an encoder (not shown).
- X mover 179 is driven to move to a position connectable to wafer stage WST2 ', X mover 178 is driven, and wafer stage WST1' is driven. Connect to The state where it has moved to a possible position is shown. Thereafter, main controller 20 connects wafer stage WST2 ′ to X mover 179 via first connection mechanism 195, and connects wafer stage WST1 ′ to X mover 178 via second connection mechanism 196. I do. Note that the X movers 178 and 179 may be moved in the X direction and the wafer stages WST1 and WST2 may be detached and attached without moving in the Y axis direction.
- main controller 20 sets the position on second exposure coordinate system described above. While controlling the position of the wafer stage WST2 ', a pair of first fiducial marks on the fiducial mark plate FM2 and a pair of reticle alignment marks on the reticle R are measured using the reticle alignment systems RAa and RAb described above. Then, wafer stage WST2 ′ is moved to an acceleration start position for exposure of the first shot area on wafer W2 based on the measurement result and the result of the previously performed enhancement.
- the main controller 20 manages the position of the wafer stage WST2 'on the second exposure coordinate system, and controls the position of the wafer stage WST2' via the X-axis linear motor 136X and the pair of Y-axis linear motors 136Y, 136Y.
- the WST2 is driven and controlled, and the exposure operation of the step 'and' scan method for the wafer W2 is performed in the same manner as in the first embodiment.
- main controller 20 includes Y-axis linear motors 138Y, 138Y and X-axis linear motors.
- the wafer stage WST1 ' is moved toward the loading position via the data 138X.
- the position of the moving wafer stage WST1 ' is managed on the above-mentioned first alignment coordinate system.
- main controller 20 controls the wafer for a new wafer.
- the alignment operation is performed in the same manner as described above.
- wafer stage WST1 'and wafer stage WST2' follow a path completely opposite to the path described above. As a result, the state returns to the state shown in FIG. 12 again.
- the exposure apparatus of the second embodiment while switching (switching) between wafer stages WST1 ′ and WST2 ′, the exposure on the wafer on one of the wafer stages is performed. Exposure operation and wafer exchange and wafer alignment operation on the other wafer stage are performed in parallel.
- a stage drive system is configured including the wafer stage drive unit 124A and the main controller 20. Further, a stage device is configured to include this stage drive system and wafer stages WST1 ′ and WST2 ′.
- the first connection mechanism 195, the second connection mechanism 196, and the Y-axis linear motor 136Y-1 is configured including the wafer stage drive unit 124A and the main controller 20.
- a stage device is configured to include this stage drive system and wafer stages WST1 ′ and WST2 ′.
- a switching device is configured.
- the stage device provided in the exposure apparatus, and the method of driving wafer stages WST1 ′ and WST2 ′ executed by the exposure apparatus From the first state in which one wafer stage WST1 '(or WST2') is located in the first area directly below the projection optical system PL to which the liquid is supplied, the other wafer stage WST2 '(or WST1') is moved from the first state.
- the stage driving system (20, 124A) moves the wafer stages WST1 'and WST2' in the X-axis direction (near the position immediately below the first area and the alignment system ALG).
- the wafer stages WST1 and WST2 ′ are simultaneously driven in the X-axis direction while maintaining a state of contact with the second regions (in the direction intersecting the Y-axis direction) via the elastic seal member 93.
- the immersion lithography is used to perform high-resolution and large-depth-of-focal-exposure as compared with the air, so that the pattern of the reticle R can be accurately detected. Can be transferred onto c.
- the moving mirror for the interferometer is provided on one X side of wafer stage WST1 ′ and on the + X side of wafer stage WST2 ′. Since the mirrors are not provided, the reflection surfaces of the moving mirrors on both wafer stages will not be close to each other even if they are close to each other in the axial direction.
- the position of the stage can be monitored by the interferometer system 118A during the simultaneous driving of the two wafer stages in the X-axis direction described above. Also, it is possible to prevent water from adhering to the reflecting surface of the moving mirror.
- the second embodiment three moving mirrors are arranged on wafer stages WST1 'and WST2', and six interferometers are arranged.
- the arrangement of the moving mirror and the interferometer is described. Is not limited to the arrangement of the second embodiment.
- two moving mirrors may be arranged on both wafer stages, respectively, and an interferometer arrangement that can measure the positions of both wafer stages using these two moving mirrors may be adopted.
- the hydraulic power held under the front lens 91 is moved from one stage to the other stage, and then is switched by the X movers 178 and 179. Force Before the water moves from one stage to the other stage, the X movers 178 and 179 may be used to change the holding.
- FIGS. 16 to 18B a third embodiment of the present invention will be described with reference to FIGS. 16 to 18B.
- the same reference numerals are used for the same or equivalent parts as in the first embodiment, and the description thereof will be simplified or omitted.
- the exposure apparatus of the third embodiment only the configuration of the wafer stage device and the like are different from those of the above-described first embodiment, and the configuration of the other portions is the same. Therefore, the following description focuses on the differences from the viewpoint of avoiding duplicate explanations.
- the wafer stage device 50 ”of the third embodiment can mount a wafer, unlike the wafer stage device 50 that constitutes the exposure device of the first embodiment described above. Wafer stage WST and a dedicated measurement stage MST.
- wafer stage WST and measurement stage MST correspond to wafer stage WST1 and wafer stage WST2 in the first embodiment described above, and are the same as wafer stage drive units (80-87) in the first embodiment. It is driven in a two-dimensional plane.
- An alignment system ALG is provided near the projection optical system PL (the barrel of the projection unit PU).
- the projection unit PU and the alignment ALG are actually nested as shown in FIG. That is, at least the lower end portion of the alignment system ALG is provided outside the portion formed around the lower end portion of the projection unit PU and smaller in diameter than the other portion (the portion around the front lens) and below the large diameter portion of the projection unit PU. Is located.
- Various measurement members are provided on the upper surface of the measurement stage MST.
- the measuring member for example, a reference mark plate on which a plurality of reference marks are formed as disclosed in Japanese Patent Application Laid-Open No. Hei 5-21314 and US Pat. No. 5,243,195 corresponding thereto.
- a sensor that receives the illumination light IL through the system PL is included.
- a sensor Is a predetermined area for receiving the illumination light IL on the image plane of the projection optical system PL disclosed in, for example, JP-A-11-11616 and the corresponding US Patent Application Publication No. 2002/0061469.
- the illumination light IL is received on the image plane of the projection optical system PL disclosed in, for example, an illuminance monitor having a light receiving section of Japanese Patent Application Laid-Open No. 57-117238 and U.S. Pat. No. 4,465,368 corresponding thereto.
- Illumination unevenness sensor having a pinhole-shaped light receiving portion, a pattern projected by a projection optical system PL disclosed in Japanese Patent Application Laid-Open No. 2002-14005 and the corresponding US Patent Application Publication No. 2002Z0041377, etc.
- An aerial image measuring device or the like that measures the light intensity of the aerial image (projected image) can be employed.
- the illumination light IL corresponds to the immersion exposure for exposing the wafer W with the exposure light (illumination light) IL via the projection optical system PL and water.
- the illumination light IL is received via the projection optical system PL and water.
- the optical system or the like may be mounted on the measurement stage MST, or the entire sensor may be arranged on the measurement stage MST.
- the wafer stage WST may or may not include a measurement member.
- At least one of the X side of the wafer stage WST and the measurement stage MST + X side has an elastic seal shown in FIG.
- An elastic seal member similar to member 93 is provided.
- the exposure apparatus the same interferometer system as that of the first embodiment is provided, and the positional force of the wafer stage WST and the measurement stage MST is set to the first actual value. It is managed similarly to the embodiment. In the following description, description of position management of both stages by the interferometer system will be omitted to avoid redundant description.
- the main controller 20 controls the liquid supply device 5 and the liquid collection device of the liquid supply / discharge system 32 according to the moving direction of the stage located in the first area immediately below the projection unit PU.
- each valve of 6 is performed as described above, and water is always filled immediately below the front end lens 91 of the projection optical system PL.
- control of the liquid supply device 5 and the liquid recovery device 6 will be omitted.
- FIG. 16 shows a state where the exposure of the wafer W on the wafer stage WST by the step-and-scan method is performed in the same manner as in the first embodiment. At this time, measurement stage MST is waiting at a predetermined standby position that does not collide with wafer stage WST.
- main controller 20 sets measurement stage MST to the position shown in FIG. Move to the position shown in A). In the state shown in FIG. 17A, the measurement stage MST and the wafer stage WST come into contact with each other via the elastic sealing member.
- main controller 20 starts an operation of simultaneously driving wafer stage WST and measurement stage MST in the + X direction while maintaining the positional relationship in the X-axis direction between wafer stage WST and measurement stage MST.
- FIG 17 (B) shows a state in which water (immersion area) is simultaneously straddling the wafer stage WST and the measurement stage MST during the above movement, that is, from the wafer stage WST to the measurement stage MST.
- the state immediately before water is passed is shown above.
- main controller 20 moves wafer stage WST to a predetermined wafer exchange position and exchanges wafers, and in parallel with this, it is necessary to perform prescribed measurement using measurement stage MST.
- An example of this measurement is a baseline measurement of an alignment ALG performed after the reticle is replaced on the reticle stage RST.
- reticle alignment marks on the reticle corresponding to a pair of first reference marks on reference mark plate FM provided on measurement stage MST are referred to as reticle alignment systems RAa, The positional relationship between the pair of first fiducial marks and the corresponding reticle alignment marks is detected simultaneously by using the RAb.
- the main controller 20 detects the second fiducial mark on the fiducial mark plate FM with the alignment system ALG to determine the positional relationship between the detection center of the alignment ALG and the second fiducial mark. To detect. Then, main controller 20 determines the positional relationship between the pair of first fiducial marks and the corresponding reticle alignment mark, the positional relationship between the alignment center of the alignment ALG and the second fiducial mark, and the known pair of first fiducial marks.
- the distance between the projection center (projection position) of the reticle pattern by the projection optical system PL and the detection center (detection position) of the alignment system ALG that is, the alignment system ALG Ask for a baseline. Note that the state at this time is shown in FIG.
- a plurality of pairs of reticle alignment marks are formed on the reticle, and a plurality of pairs of the first reference marks are formed on the reference mark plate FM in response to this.
- the relative positions of at least two pairs of first fiducial marks and the corresponding reticle alignment marks should be measured using reticle alignment systems RAa and RAb while moving reticle stage RST and measurement stage MST. So-called reticle alignment is performed.
- mark detection using reticle alignment systems RAa and RAb is performed via projection optical system PL and water.
- the main control device 20 connects the measurement stage MST and the wafer stage WST to the elastic seal section, for example.
- the wafer W is driven in the XY plane while maintaining the state in which the wafer W is in contact with the wafer W, and the wafer alignment is performed on the wafer W after the replacement, that is, on the wafer W after the replacement by the alignment system ALG. Alignment marks are detected, and position coordinates of a plurality of shot areas on the wafer W are calculated.
- main controller 20 simultaneously drives both stages WST and MST in the X direction while maintaining the positional relationship between wafer stage WST and measurement stage MST in the X-axis direction, contrary to the above.
- measurement stage MST is moved to a predetermined position. Evacuate to a position.
- main controller 20 performs a step-and-scan exposure operation on wafer W, and sequentially transfers a reticle pattern to a plurality of shot areas on wafer W.
- the movement of the wafer stage WST to the acceleration start position for exposure of each shot area on the wafer W is based on the position coordinates of a plurality of shot areas on the wafer W obtained as a result of the above wafer alignment, This is performed based on the baseline measured immediately before.
- the measurement operation is not limited to this, and the illuminance measurement, the illuminance unevenness measurement, and the aerial imager measurement are performed using the measurement stage MST.
- the measurement stage MST can be performed in parallel with wafer exchange, and the measurement results can be used to reflect the subsequent exposure of wafer W.
- the sensors mounted on measurement stage MST are not limited to those described above, and for example, a sensor for performing wavefront measurement may be provided.
- the third embodiment has the same configuration as the first embodiment. Further, at least a part of a stage drive system is configured by a wafer stage drive section (80-87). The stage drive system, the wafer stage WST and the measurement stage MST constitute at least a part of a stage device.
- the projection optics to which the liquid (water) is supplied by the wafer stage WST (or the measurement stage MST)
- the two stages are driven by the stage drive system described above. Force ⁇ ⁇ ⁇
- the wafer stage WST and the measurement stage MST are simultaneously driven in the axial direction while maintaining contact with the elastic seal member in the axial direction. For this reason, water (liquid) is supplied between the projection optical system PL and a specific stage immediately below (this stage switches from one stage to the other as the stage moves).
- the measurement stage MST side starts the measurement immediately below the projection optical system PL. From the state in which water is held between the wafer stage WST and the projection optical system PL to the state in which water is held between the measurement stage MST and the projection optical system PL, the process of total recovery and resupply of water. It is possible to make a transition without going through. The same applies to the start of the exposure by the wafer stage WST after the end of the measurement by the measurement stage MST.
- the pattern of the reticle R can be accurately transferred onto the wafer, and for example, a fine pattern of about 70-100 nm can be transferred as a device rule.
- each measurement can be performed using the measurement member mounted on the measurement stage MST every time the wafer is replaced, and the measurement results can be reflected in the subsequent exposure operation. Can expose the wafer.
- the measurement operation performed using the measurement stage MST does not use the illumination light IL
- the measurement operation on the measurement stage MST side is performed by the wafer W on the wafer stage WST side. It can be performed in parallel with the exposure operation.
- wafer alignment is performed in a state where measurement stage MST and wafer stage WST are in contact with each other via an elastic seal member.
- wafer alignment is performed. Before moving the wafer stage WST below the projection optical system PL (and alignment system ALG) with the two stages in contact with each other, and retracting the measurement stage MST, the wafer alignment is performed. Even good.
- the first fiducial mark and the second fiducial mark on the fiducial mark plate FM can be measured simultaneously, but the first fiducial mark and the second fiducial mark After measuring one of the marks, the measurement stage MST may be powered to measure the other while water is held on the measurement stage MST.
- the elastic seal member used in the first to third embodiments includes one stage (here, stage WST2 (WST2 ′, MST) ), A groove 49 having a substantially trapezoidal cross section may be formed on the + X side surface, and an elastic seal member 93 ′ embedded in the groove 49 may be employed. Even in this case, the same effects as those of the above embodiments can be obtained.
- the configuration shown in FIG. 19 (A) may be provided on both stages instead of only one stage.
- a groove 49 ' having a substantially trapezoidal cross section is formed on the + Z plane of one stage (here, stage WST1 (WST1', WST)).
- An elastic seal member 93 " may be mounted in the groove 49 'in an embedded state, and a flat plate 94 may be provided at the + X side end of the upper surface of the other stage (here, stage WST2 (WST2', MST)).
- stage WST2 WST2', MST
- a water-repellent coat 95 to each of the opposing side surfaces of both stages by using, for example, Teflon (registered trademark) or the like, water can enter the gap between both stages. Intrusion and water leakage may be prevented. As a result, a non-contact state is maintained between the two stages, and there is no risk that the contact between the two stages will cause the stage to be deformed or the position control accuracy to deteriorate.
- the elastic seal member is provided.
- both stages may be in direct contact with each other while one stage transitions from a state directly below the projection unit PU to a state immediately below the projection unit PU.
- the two stages are close to each other (for example, the distance between the two stages is 2 mm or less) at the time of force transition depending on the material of the two stages, the surface condition and shape of the stages, the type of liquid, etc. If the liquid does not leak due to the tension, the water-repellent coat may not be applied. In short, it is good to maintain the positional relationship so that the liquid does not leak from both stages and make the transition between both stages.
- leakage of water (liquid) into the gap between the two stages at the time of the transition may be acceptable if the amount of leakage is small. It is acceptable to decide on the stage material, the state and shape of the stage surface, and the allowable amount of leakage that depends only on the type of liquid.
- the reflecting surface of the moving mirror is not formed on the contact surface of the two stages, but this is not an essential requirement.
- the reflecting surface of the movable mirror may be formed on the contact surface of at least one stage.
- a fourth embodiment described below can be considered.
- FIGS. 20 to 23B a fourth embodiment of the present invention will be described with reference to FIGS. 20 to 23B.
- the same or equivalent parts as those of the third embodiment described above have the same reference numerals. And the description thereof will be simplified or omitted.
- the configuration of the wafer stage apparatus (including the arrangement of the interferometer) is only partially different from that of the third embodiment described above, and the configuration of the other parts is the same.
- the configuration is similar to that of the device of the third embodiment. Therefore, the following description focuses on the differences from the viewpoint of avoiding redundant description.
- the wafer stage apparatus 150 of the fourth embodiment includes a wafer stage WST 'on which a wafer can be mounted, a measurement stage MST' dedicated to measurement, and six laser interferometers. (Hereinafter abbreviated as “interferometer”).
- An interferometer system including IF1 to IF6 is provided.
- the wafer stage WST ′ has a plate-shaped eave in which a part of the upper end on the ⁇ X side (the side facing the measurement stage MST ′) protrudes from other parts.
- the forces other than the wafer stage WST according to the third embodiment are otherwise configured in the same manner as the wafer stage WST. Further, the upper surface of the wafer stage WST ′ is almost flush (same surface) including the surface of the wafer W and the eaves 11 la with the wafer W mounted thereon.
- the measurement stage MST ′ is connected to its + X side (the side facing the wafer stage WST ′) with the tip of the eaves section 11a via a predetermined clearance.
- a protruding portion 11lc having a compatible step portion 11lb at its upper end is provided, and its -X side end surface Sa, + Y side end surface Sb, and + X side end surface (projection 111c)
- a reflecting surface formed by mirror finishing is provided on Sc in place of the moving mirror described above.
- other parts are configured in the same way as the measurement stage MST. In this case, as shown in FIG.
- the wafer stage WST ′ and the measurement stage MST ′ of the present embodiment are Like the wafer stage WST and the measurement stage MST according to the embodiment, the wafer stage is driven in a two-dimensional plane by a wafer stage drive unit (80-87).
- the interferometer system includes a projection center (optical axis AX) of the projection optical system PL, a detection center of the alignment system ALG, and a predetermined distance from the projection center of the projection optical system PL.
- Three Y-axis interferometers IF3, IF4, and IF2 each having a length measurement axis parallel to the Y-axis that passes through positions separated in the X direction, the projection center (optical axis AX) of the projection optical system PL, and the alignment system
- Two X-axis interferometers IF1 and IF5 each having a length measurement axis parallel to the X-axis connecting the detection center of ALG, and a predetermined distance from the projection center of the projection optical system PL-X-axis passing through a position away in the Y-direction
- an interferometer IF6 having a length measuring axis parallel to.
- the wafer stage WST ' is positioned near the position just below the optical axis of the projection optical system PL (the
- the position of the wafer stage WST' is controlled by the X-axis interferometer IF5 and the Y-axis interferometer IF3.
- the coordinate system defined by the measurement axes of the X-axis interferometer IF5 and the Y-axis interferometer IF3 is referred to as an exposure coordinate system.
- wafer stage WST is located in a region (second region) near the position immediately below the detection center of alignment system ALG, and detects alignment marks formed on the wafer on wafer stage WST '.
- the position of the wafer stage WST ′ is managed by the X-axis interferometer IF5 and the Y-axis interferometer IF4.
- the coordinate system defined by the respective measurement axes of the X-axis interferometer IF5 and the Y-axis interferometer IF4 is called an alignment coordinate system.
- the position of the measurement stage MST ′ is managed by the X-axis interferometer IF1 and the Y-axis interferometer IF2. Is done.
- the coordinate system defined by the measurement axes of the X-axis interferometer IF1 and the Y-axis interferometer IF2 is referred to as a standby coordinate system.
- X-axis interferometer IF6 measures the position of wafer stage WST 'in the X-axis direction, for example, when exchanging a wafer after exposure of the wafer.
- the X-axis interferometers IF5 and IF1 are multi-axis interferometers having at least three optical axes separated in the Y-axis direction and the Z-axis direction, each The output value of the optical axis can be measured independently. Therefore, in these X-axis interferometers IF5 and IF1, besides measuring the position of wafer stage WST1 and measurement stage MST in the X-axis direction, the rotation amount around the Y-axis (rolling amount) and the rotation amount around the Z-axis (Amount of jowing) can be measured.
- the X-axis interferometer IF6 may be a multi-axis interferometer or an interferometer having a single optical axis.
- the Y-axis interferometers IF2, IF3, and IF4 are, for example, two-axis interferometers each having two optical axes separated in the Z-axis direction, and the output value of each optical axis can be measured independently. It is as follows. Therefore, these Y-axis interferometers IF2, IF3, and IF4 can measure the rotation amount (pitching amount) around the X-axis in addition to measuring the position of the wafer stage WST or the measurement stage MST 'in the Y-axis direction. ing.
- the main controller 20 controls the liquid supply device 5 and the liquid recovery device 6 of the liquid supply / discharge system 32 according to the moving direction of the stage located in the first area immediately below the projection unit PU.
- the opening / closing control of each valve is performed as described above, and the water immediately below the tip lens 91 of the projection optical system PL is always filled with water.
- description of control of the liquid supply device 5 and the liquid recovery device 6 will be omitted.
- FIG. 20 shows a state where exposure of the wafer W on the wafer stage WST ′ by the step-and-scan method is performed in the same manner as in the first embodiment.
- measurement stage MST ′ is waiting at a predetermined standby position that does not collide with wafer stage WST ′.
- main controller 20 manages the position of measurement stage MST ′ on the aforementioned standby coordinate system, and manages the position of wafer stage WST ′ on the aforementioned exposure coordinate system.
- main controller 20 sets measurement stage MST' to FIG. 22 Move to the position shown in (A).
- measurement stage MST ′ and wafer stage WST ′ are connected to wafer stage WST ′ as shown in FIG.
- the -X side end surface of the provided eaves section 11 la and the -X side face of the step section 11 lb of the measurement stage MST ' are close to (or in contact with) each other.
- the width dimension force in the X-axis direction of eaves section 11 la on wafer stage WST ′ side is set to be larger than the width dimension in the X-axis direction of step section 11 lb on measurement stage MST ′ side. Therefore, the mirror-finished end surface (reflection surface) Sc of the measurement stage MST 'and the X-side end surface (the part below the eaves portion 11 la of the X-side end surface) excluding the eaves 11 la of the wafer stage WST' Contact can be avoided.
- main controller 20 simultaneously drives wafer stages WST ′ and MST ′ in the + X direction while maintaining the positional relationship between wafer stage WST ′ and measurement stage MST ′ in the X-axis direction.
- main controller 20 simultaneously drives wafer stage WST and measurement stage MST ′, in the state of FIG. 22A, tip lens 91 of projection unit PU and wafer are moved.
- the wafer stage WST 'and the measurement stage MST held between W and W move to the + X side
- the wafer W moves sequentially on the wafer stage WST' and the measurement stage MST '.
- the wafer stage WST ′ and the measurement stage MST ′ maintain the positional relationship as shown in FIG. Fig. 22 (B) shows the state when water (liquid immersion area) is simultaneously straddling the wafer stage WST 'and the measurement stage MST' during the above movement, that is, the water stage is measured from the wafer stage WST '.
- stage MST ' The state immediately before water is passed on stage MST 'is shown. Even in this state, the wafer stage WST ′ and the measurement stage MST maintain the positional relationship as shown in FIG. In the state shown in FIG. 21, the gap between the edge of the eaves section 11la of the wafer stage WST 'and the upper surface edge of the measurement stage MST' facing the eaves section 11la is maintained at 0.3 mm or less. Therefore, even if water moves over the gap, it is possible to prevent water from entering the gap. In this case, by making each of the upper surface of the eaves section 11 la and the upper surface of the measurement stage MST 'water-repellent (the contact angle with water is 80 ° or more), it is possible to more reliably prevent water from entering the gap.
- the contact angle with water is 80 ° or more
- the interferometer beam from the interferometer IF2 becomes a force that does not hit the end face Sb of the measurement stage MST '.
- the interferometer beam of the interferometer IF3 is changed to the measurement stage MST 'So that it hits the end face Sb Therefore, the main controller 20 resets (or presets) the interferometer IF3 at that time.
- main controller 20 drives measurement stage MST 'in the + X direction and + Y direction in parallel with driving wafer stage WST' in the + X direction and one Y direction.
- the interferometer beam from the interferometer IF5 stops hitting the end surface Se of the wafer stage WST ', and the interferometer beam from the interferometer IF6 hits.
- the interferometer beam striking preset the interferometer IF6 using the measurement value of the interferometer IF5.
- the main controller 20 stops the interferometer at some point when both interferometer beams hit.
- the main controller 20 Preset the interferometer IF4 using the measured value of IF3.
- the main controller 20 resets the interferometer IF5 (or considers the measured value of the interferometer IF1). (Preset).
- wafer stage WST ' is at a predetermined wafer exchange position, and measurement stage MST' is located immediately below projection optical system PL, as shown in FIG. 23 (B).
- the interferometer beam of the interferometer IF4 stops hitting the wafer stage WST ', the position in the Y-axis direction cannot be measured by the interferometer system.
- Force The Y position of the wafer stage WST' is Good to manage.
- an interferometer capable of measuring the position of the wafer stage WST 'in the Y-axis direction when the wafer stage WST is at the wafer exchange position may be added. In the state shown in FIG.
- the wafer is exchanged on the wafer stage WST 'side, and in parallel with this, predetermined measurement is executed on the measurement stage MST' side as necessary.
- a baseline measurement of the alignment system ALG is performed in the same manner as in the third embodiment after the reticle is replaced on the reticle stage RST.
- the baseline (amount) is obtained by measuring the baseline. Alignment (positioning) of the wafer W based on this can be performed with high accuracy.
- the above-described reticle alignment is performed together with the measurement of the baseline of the alignment ALG.
- main controller 20 sets, for example, measurement stage MST 'and wafer stage WST' to the state shown in Fig. 23 (A). Then, while maintaining the state in which the wafer stage WST 'and the measurement stage MST' are close to (or in contact with) each other, the wafer stage is driven in the XY plane, and wafer alignment is performed on the replaced wafer W in the same manner as described above. That is, the alignment marks on the wafer W after replacement by the alignment system ALG are detected, and the position coordinates of a plurality of shot areas on the wafer W are calculated. Note that the position of the wafer stage WST during the wafer alignment is managed on the alignment coordinate system described above.
- main controller 20 drives both stages WST and MST simultaneously in the X direction, contrary to the above, while maintaining the positional relationship between wafer stage WST 'and measurement stage MST' in the X axis direction.
- measurement stage MST ′ is retracted to a predetermined position. During this time, presetting of the interferometer in the interferometer system and the like are performed in the reverse order to the above.
- main controller 20 executes a step-and-scan exposure operation on wafer W in the same manner as in the above embodiments, and sequentially prints reticle patterns on a plurality of shot areas on wafer W. Transcribe.
- the present invention is not limited to this, and the illuminance measurement, the illuminance unevenness measurement, and the space image are performed similarly to the third embodiment. It is good also as performing a meter measurement etc. Also, similarly to the above-described third embodiment, various measurements can be executed as necessary every time a predetermined number of wafers (for example, one wafer) are replaced, which is limited only after the completion of exposure of one lot. Further, a wavefront aberration measuring device may be mounted on measurement stage MST ′, and measurement operation may be performed to measure the wavefront aberration of projection optical system PL. Alternatively, it is good to check the state of the liquid immersion area formed on the image side of the projection optical system PL by installing an observation power lens on the measurement stage MST '.
- the detection of ⁇ Rye placement mark on the wafer W after the replacement by Araimento system ALG is ⁇ Zushimo, but 'and measurement stage MST' wafer stage W ST and is a maintaining a predetermined proximity to al executed
- the detection of the alignment mark may be started after both stages are separated, or after detecting some alignment marks while both stages are close to each other, the two stages may be separated from each other. The remaining alignment marks may be detected.
- the wafer stage WST ′ (or measurement stage MST ′) supplies liquid (water).
- the system (including the wafer stage drive section (80-87)) engages the eaves section 11 la on the wafer stage WST 'side with the step section 11 lb on the measurement stage MST' side and engages the wafer.
- a full flat surface is realized by the upper surface of stage WST, and the upper surface of measurement stage MST.
- water (liquid) is held between the projection optical system PL and at least one of the stages directly underneath (this stage switches to the other stage as it moves).
- this stage switches to the other stage as it moves.
- one of the stages can be changed from the first state located in the first area to the second state located in the first area without leaking the liquid from the gap between the two stages. It becomes possible. That is, after the exposure operation via the projection optical system PL and water (liquid) is performed on the wafer stage WST 'side, the measurement is started immediately below the projection optical system PL on the measurement stage MST' side.
- the time from the end of the exposure operation on the wafer stage WST 'side to the start of the measurement operation on the measurement stage MST' side, and the time from the end of the measurement on the measurement stage MST side to the wafer Improve throughput by shortening the time until the start of the exposure operation on the stage WST 'side (that is, maintaining it at the same level as a normal non-immersion exposure apparatus (non-immersion exposure apparatus)) It becomes possible. Further, since water (liquid) is always present on the image plane side of the projection optical system PL, it is possible to effectively prevent the occurrence of the above-mentioned water stain (water mark).
- eaves portion 11 la is provided on wafer stage WST ′ and step portion 11 lb associated therewith is provided on measurement stage MST ′, both stages are opposed to each other.
- the measurement stage MST' starts from the state where water is held between the wafer stage WST 'and the projection optical system PL. It is possible to make a transition to a state where water is held between the projection optical system PL and vice versa.
- the pattern of reticle R can be accurately transferred onto a wafer. Transfer of a fine pattern of about 100 nm can be realized.
- the eaves portion 11 la is provided on the wafer stage WST ′ side, and the protrusion 111 c having the step portion 11 lb is provided on the measurement stage MST ′ side.
- the present invention is not limited to this.
- a projection having a step may be provided on the wafer stage WST 'side, and an eave portion may be provided on the measurement stage MST' side.
- the force S described in the case where the + X side end of the measurement stage MST ′ is formed by the single protrusion 111c having the step 11 lb formed at the upper end. This is because the end surface Sc of the protruding portion 111c on the + X side must be used as a reflecting surface.
- the portion corresponding to the protrusion 11 lb is provided at the upper end with a step portion which can be engaged with the eaves portion 11 la via a predetermined clearance.
- the remaining good parts can be of any shape.
- the shape of the remaining portion may be any shape.
- the eaves portion 11la is a plate member detachable from the main body of the wafer stage WST ', which is formed integrally with the wafer stage WST'. It is okay to form the eaves 111a with
- an elastic seal member is provided at a position where the elastic seal member is interposed between the eaves portion 111a and the step portion 111b. Even good. That is, for example, by providing an elastic seal member at the one X-side end of the eave portion 11 la, water leakage between the wafer stage WST ′ and the measurement stage MST ′ can be completely prevented. Further, by providing the elastic seal member, even when the wafer stage WST 'comes into contact with the measurement stage MST', the impact can be reduced.
- an elastic seal member may be provided on the measurement stage side, and instead of the elastic seal member, a water-repellent coat may be applied to at least one of the wafer stage and the measurement stage at a position where both stages face each other. It is good.
- the concept of providing the eaves portion on one side of the stage of the fourth embodiment and providing the stepped portion on the other side is not limited to the case where the two stages are a measurement stage and a wafer stage.
- the present invention can also be adopted when both of the two stages are wafer stages.
- the wafer stage WST1 Since the positional relationship with the wafer stage WST2 in the X-axis direction does not change, as shown in FIG. 24, one side of the wafer stage in the X-axis direction has an eave portion 11 la and the other wafer stage has the X-axis direction.
- a step 11 lb may be provided with a projection 11 lc formed at the upper end thereof.
- the state in which water is in contact with one wafer stage and the other The state can be changed to a state where water is in contact with the wafer stage.
- the water held under the front lens 91 moves from one stage to the other stage, the water is held under the front lens 91.
- the supply and recovery of water may be stopped as it is.
- ultrapure water water
- a liquid which is chemically stable and has a high transmittance of the illumination light IL and which is safe for example, a fluorine-based inert liquid
- a fluorine-based inert liquid for example, Fluorinert (trade name of Threeem, USA) can be used. This fluorine-based inert liquid is also excellent in the cooling effect.
- a liquid that has transparency to the illuminating light IL and a refractive index as high as possible and that is stable against the photoresist applied to the surface of the projection optical system wafer should be used.
- fluorine is used as the liquid.
- the collected liquid may be reused.
- a filter for removing impurities from the collected liquid is provided in the liquid collection device, the collection pipe, or the like. It is desirable to keep.
- the optical element closest to the image plane of the projection optical system PL is the tip lens.
- the force is assumed to be 91.
- the optical element is not limited to a lens.
- An optical plate parallel plane plate, etc. used to adjust the optical characteristics of the projection optical system PL, such as aberration (spherical aberration, coma aberration, etc.) Or a simple cover glass.
- the optical element closest to the image plane of the projection optical system PL (the tip lens 91 in the above-described embodiment) is a liquid (the above-described lens) due to scattered particles generated from the resist due to irradiation of the illumination light IL or adhesion of impurities in the liquid.
- the surface may be stained by contact with water). Therefore, the optical element may be fixed to the lowermost part of the lens barrel 40 so as to be detachable (replaceable), and may be replaced periodically.
- the optical element that comes into contact with the liquid is a lens
- the cost of the replacement part and the time required for replacement become long, and the maintenance cost (running cost) increases. This causes an increase in the cost and a decrease in throughput. Therefore, the optical element that comes into contact with the liquid may be, for example, a parallel flat plate that is less expensive than the tip lens 91.
- the range in which the liquid (water) flows is good if it is set so as to cover the entire projection area (irradiation area of illumination light IL) of the reticle pattern image.
- the thickness may be arbitrarily set, but in controlling the flow velocity, the flow rate, and the like, it is desirable to make the area slightly larger than the irradiation area and make the range as small as possible.
- the present invention is applied to a scanning type exposure apparatus such as a step 'and' scan method, but the scope of the present invention is not limited to this. Of course. That is, the present invention can be suitably applied to a step-and-repeat type reduction projection exposure apparatus.
- the application of the exposure apparatus is not limited to the exposure apparatus for semiconductor manufacturing.
- an exposure apparatus for a liquid crystal for transferring a liquid crystal display element pattern onto a square glass plate, an organic EL, a thin film magnetic head it can be widely applied to exposure devices for manufacturing imaging devices (CCD, etc.), micromachines, DNA chips, and the like.
- glass substrates or silicon wafers are used to manufacture reticles or masks used in light exposure equipment that can be used only with micro devices such as semiconductor devices, EUV exposure equipment, X-ray exposure equipment, and electron beam exposure equipment.
- the present invention can also be applied to an exposure apparatus that transfers a circuit pattern to a substrate.
- the light source of the exposure apparatus of each of the above embodiments is not limited to the ArF excimer laser light source, but may be a pulse laser light source such as a KrF excimer laser light source or an F laser light source, a g-line (wavelength 436 nm), an i-line ( It is also possible to use an ultra-high pressure mercury lamp that emits an emission line with a wavelength of, for example, 365 nm.
- a single-wavelength laser beam in the infrared or visible region oscillated from a DFB semiconductor laser or a fiber laser is amplified by, for example, a fiber amplifier doped with erbium (or both erbium and ytterbium), It is also possible to use a harmonic whose wavelength has been converted to ultraviolet light using a nonlinear optical crystal.
- the magnification of the projection optical system is not limited to the reduction system, but can be the same magnification and enlargement system.
- FIG. 26 shows a flowchart of an example of manufacturing devices (semiconductor chips such as ICs and LSIs, liquid crystal panels, CCDs, thin-film magnetic heads, micromachines, etc.).
- step 201 design step
- the function of the device and the performance design for example, the circuit design of a semiconductor device
- the pattern design for realizing the function is performed.
- step 202 mask manufacturing step
- step 203 wafer manufacturing step
- a wafer is manufactured using a material such as silicon.
- step 204 wafer processing step
- step 205 device assembly step
- step 205 includes steps such as a dicing step, a bonding step, and a packaging step (chip sealing) as necessary.
- step 206 inspection step
- inspections such as an operation confirmation test and a durability test of the device created in step 205 are performed. After these steps, the device is completed and shipped.
- FIG. 27 shows a detailed flow example of step 204 in the semiconductor device.
- step 211 oxidation step
- step 212 CVD step
- step 213 electrode formation step
- step 214 ion implantation step
- ions are implanted into the wafer.
- the post-processing step is executed as follows.
- step 215 resist forming step
- step 216 exposure step
- step 217 development step
- Step 218 etching step
- step 219 resist removing step
- the wafer (substrate) is exposed by the energy beam (illumination light IL) using the exposure apparatus of each of the above embodiments in the exposure step (step 216).
- the energy beam illumination light IL
- the productivity of a highly integrated microdevice on which a fine pattern is formed can be improved.
- the stage driving method of the present invention is suitable for driving the first stage and the second stage.
- the exposure apparatus of the present invention is suitable for supplying a liquid between the projection optical system and the substrate and exposing the substrate with an energy beam through the projection optical system and the liquid.
- the device manufacturing method of the present invention is suitable for producing micro devices.
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- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
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Abstract
Description
Claims
Priority Applications (43)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/588,029 US7589822B2 (en) | 2004-02-02 | 2004-02-02 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
KR1020157001506A KR101673826B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020187002348A KR20180011877A (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020127015767A KR101276423B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020157028041A KR101698290B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117026306A KR101276512B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020127019814A KR101288139B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
AT05704182T ATE493753T1 (de) | 2004-02-02 | 2005-01-27 | Bühnenantriebsverfahren und bühnenantriebsvorrichtung, belichtungsvorrichtung und bauelemente-herstellungsverfahren |
KR1020147017029A KR101590742B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
DE602005025596T DE602005025596D1 (de) | 2004-02-02 | 2005-01-27 | Bühnenantriebsverfahren und bühnenantriebsvorrichtung, belichtungsvorrichtung und bauelemente-herstellungsverfahren |
KR1020067012095A KR101187616B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고디바이스 제조 방법 |
KR1020177000846A KR101824373B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
EP05704182A EP1713113B1 (en) | 2004-02-02 | 2005-01-27 | Stage drive method and stage drive apparatus, exposure apparatus, and device producing method |
KR1020127019812A KR101476015B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117003587A KR101235523B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117003625A KR101187614B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020137031485A KR101539877B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117003626A KR101187618B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117003627A KR101187615B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
KR1020117003628A KR101191061B1 (ko) | 2004-02-02 | 2005-01-27 | 스테이지 구동 방법 및 스테이지 장치, 노광 장치, 그리고 디바이스 제조 방법 |
JP2005517477A JP4910394B2 (ja) | 2004-02-02 | 2005-01-27 | 露光装置、露光方法、及びデバイス製造方法 |
IL177221A IL177221A (en) | 2004-02-02 | 2006-08-01 | Stage leadership method and stage unit, exposure facility and facility and production method |
IL226841A IL226841A (en) | 2004-02-02 | 2006-08-01 | Stage leadership and stage unit method, exposure facility and facility and production method |
IL226838A IL226838A (en) | 2004-02-02 | 2006-08-01 | Stage leadership and stage unit method, exposure facility and facility and production method |
HK06111676.2A HK1093606A1 (en) | 2004-02-02 | 2006-10-23 | Stage drive method and stage drive apparatus, exposure apparatus, and device producing method |
US11/785,860 US8045136B2 (en) | 2004-02-02 | 2007-04-20 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
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US12/461,246 US8547528B2 (en) | 2004-02-02 | 2009-08-05 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
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US12/659,894 US9665016B2 (en) | 2004-02-02 | 2010-03-24 | Lithographic apparatus and method having substrate table and sensor table to hold immersion liquid |
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US12/923,783 US8724079B2 (en) | 2004-02-02 | 2010-10-07 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
US12/923,786 US8736808B2 (en) | 2004-02-02 | 2010-10-07 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
US13/435,780 US9684248B2 (en) | 2004-02-02 | 2012-03-30 | Lithographic apparatus having substrate table and sensor table to measure a patterned beam |
IL226841A IL226841A0 (en) | 2004-02-02 | 2013-06-09 | Stage driving method and stage unit, exposure device and production device and method |
IL226840A IL226840A (en) | 2004-02-02 | 2013-06-09 | Stage leadership and stage unit method, exposure facility and facility and production method |
IL226838A IL226838A0 (en) | 2004-02-02 | 2013-06-09 | Stage driving method and stage unit, exposure device and production device and method |
IL226839A IL226839A (en) | 2004-02-02 | 2013-06-09 | Stage leadership and stage unit method, exposure facility and facility and production method |
US14/663,084 US10007196B2 (en) | 2004-02-02 | 2015-03-19 | Lithographic apparatus and method having substrate and sensor tables |
US14/847,746 US10139737B2 (en) | 2004-02-02 | 2015-09-08 | Lithographic apparatus and method having substrate and sensor tables |
US16/196,416 US20190086815A1 (en) | 2004-02-02 | 2018-11-20 | Lithographic apparatus and method having substrate and sensor tables |
Applications Claiming Priority (4)
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JP2004025837 | 2004-02-02 | ||
JP2004-025837 | 2004-02-02 | ||
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US10/588,029 A-371-Of-International US7589822B2 (en) | 2004-02-02 | 2004-02-02 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
US11/785,860 Division US8045136B2 (en) | 2004-02-02 | 2007-04-20 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
US11/812,919 Division US9632431B2 (en) | 2004-02-02 | 2007-06-22 | Lithographic apparatus and method having substrate and sensor tables |
US12/461,244 Division US8553203B2 (en) | 2004-02-02 | 2009-08-05 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
US12/461,246 Division US8547528B2 (en) | 2004-02-02 | 2009-08-05 | Stage drive method and stage unit, exposure apparatus, and device manufacturing method |
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