WO2003104746A1 - 位置計測方法、露光方法、露光装置、並びにデバイス製造方法 - Google Patents
位置計測方法、露光方法、露光装置、並びにデバイス製造方法 Download PDFInfo
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- WO2003104746A1 WO2003104746A1 PCT/JP2003/006941 JP0306941W WO03104746A1 WO 2003104746 A1 WO2003104746 A1 WO 2003104746A1 JP 0306941 W JP0306941 W JP 0306941W WO 03104746 A1 WO03104746 A1 WO 03104746A1
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- dependent component
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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
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7073—Alignment marks and their environment
- G03F9/7076—Mark details, e.g. phase grating mark, temporary mark
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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
- G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
- G03F1/38—Masks having auxiliary features, e.g. special coatings or marks for alignment or testing; Preparation thereof
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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
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7092—Signal processing
Definitions
- the present invention relates to a position measurement method for imaging a mark formed on an object through an observation system, processing the imaging signal, and measuring position information related to the position of the mark, in particular, a semiconductor element or a liquid crystal display element
- the present invention relates to an exposure method used in the manufacturing process of devices such as, and a technique used in an exposure apparatus. Background art
- circuit patterns of multiple layers are formed in a predetermined positional relationship by being stacked on a substrate (wafer, glass plate, etc.) while performing processing. Therefore, when exposing the circuit pattern of the second and subsequent layers on the substrate with the exposure device, the alignment (alignment) between the pattern of the mask (or reticle) and the pattern already formed on the substrate can be made with high accuracy. There is a need to do.
- Alignment marks are formed on the substrate and mask, and positional information on the positions of the marks is measured, and the alignment is performed based on the positional information.
- a mark on a substrate or a mask is illuminated with an illumination beam, the optical image thereof is imaged through an observation system provided with an imaging means such as a CCD camera, and the imaging signal is signal processed. There is a method of obtaining the position information of the mark.
- noise generated in the observation system may be included in the imaging signal.
- measurement errors may occur due to the influence of noise contained in the imaging signal.
- the present invention has been made in view of the above-described circumstances, and it is an object of the present invention to provide a position measurement method capable of accurately measuring mark position information even when noise is contained in an imaging signal. I assume. Another object of the present invention is to provide an exposure method and an exposure apparatus capable of improving the exposure accuracy.
- Another object of the present invention is to provide a device manufacturing method capable of improving the pattern accuracy. Disclosure of the invention
- marks (RM1 and RM2) formed on the object (R) are illuminated with illumination beams, and the beams generated from the marks (RM1 and RM2) are observed by the observation system (22 A, 22 B).
- the position measuring method of imaging through the imaging signal and processing the imaging signal to measure the positional information on the position of the mark (RM1, RM2) information on noise including a light quantity dependent component included in the imaging signal And perform signal processing based on the imaging signal.
- the effect of the noise can be corrected at the time of position measurement by performing signal processing based on the information on the noise contained in the image pickup signal in addition to the image pickup signal of the mark. Since the noise contains a light quantity dependent component, the position information of the mark can be measured with high accuracy by correcting the influence.
- the noise influence on the imaging signal can be easily corrected by measuring the noise including the light quantity dependent component in advance before performing the signal processing of the imaging signal.
- noise including a light quantity dependent component, for example, a non-mark area different from the mark area on the object (R) where the mark (RM 1, RM 2) is formed is illuminated with an illumination beam, This is done by imaging through the observation system (22A, 22B).
- the mark (RM1 and RM2) includes a plurality of mark elements, among the plurality of mark elements, the area including the mark elements excluding the measurement target is illuminated with the illumination beam to affect the position measurement.
- the light quantity dependent component of noise can be measured more accurately.
- the noise containing the light quantity dependent component is generated, for example, due to the beam generated from the mark (RM1, RM2) passing through the observation system (22A, 22B).
- the noise containing the light quantity dependent component is generated, for example, due to the beam generated from the mark (RM1, RM2) passing through the observation system (22A, 22B).
- a cause of noise generation in the observation system (22A, 22B) for example, interference fringes generated on the cover glass of the mirror (73, 86) or the imaging device (78), or in the imaging device (78) Variations in sensitivity among a plurality of pixels may be mentioned.
- the noise may include a light quantity independent component.
- the illumination beam has an observation system (22A,
- the signal processing is a process of subtracting the light quantity independent component of the noise from the imaging signal or a process of subtracting or dividing the light quantity dependent component of the noise from the imaging signal
- the signal processing includes processing for dividing the processing result obtained by subtracting the light amount independent component from the light amount dependent component of noise from the processing result obtained by subtracting the light amount independent component of noise from the imaging signal. The effect of noise on the is well corrected.
- the marks (RM 1, RM 2) formed on the mask (R) or the substrate (W) are used.
- the WFM 1 and WFM 2) are illuminated with an illumination beam, and the beam generated from this mark is imaged through the observation system (22A, 22B), and the imaging signal of the observation system (22A, 22B) and this imaging
- the imaging signal is subjected to signal processing to measure the positional information on the position of the mark, and based on the measured positional information, the mask (R ) Or position the substrate (W) at the exposure position.
- an object is illuminated with an illumination beam and generated from the object
- the observation system (22A, 22 B) for imaging the beam and the marks (RM1, RM2, WFM1, WFM2) formed on the mask (R) or the substrate (W) are observed by the observation system (22A, 22 B)
- Signal processing means (13) for imaging through the imaging signal and processing the imaging signal to measure position information related to the position of the mark, and based on the measured position information, a mask (R) or And positioning means (24) for positioning the substrate (W) at the exposure position, and the signal processing means (1 3) comprises information on the noise including the light quantity dependent component contained in the imaging signal and the imaging signal. Based on the signal processing.
- the exposure accuracy can be improved.
- a device manufacturing method includes the step of transferring a device pattern formed on a mask onto a substrate using the above-described exposure method or the above-described exposure apparatus.
- the exposure accuracy is high, and the pattern accuracy can be improved.
- FIG. 1 is a view schematically showing the configuration of a reduction projection exposure apparatus for manufacturing a semiconductor device.
- FIG. 2 is a diagram showing the configuration of a reticle alignment microscope.
- FIG. 3 is a view showing a configuration example of a reticle mark.
- FIG. 4 is a view showing a configuration example of a wafer reference mark.
- FIG. 5 is a view showing an image of a reticle mark and a wafer reference mark simultaneously formed on the light receiving surface of the observation camera, and an imaging signal (photoelectric conversion signal) thereof.
- FIG. 6 is a flowchart showing an example of the procedure of mark position measurement operation.
- FIG. 7A is a diagram for explaining the influence of the noise included in the imaging signal on the position measurement of the mark.
- FIG. 7B is a diagram for explaining the influence of the noise included in the imaging signal on the position measurement of the mark.
- Fig. 8 A shows the marks (reticle marks and wafer reference marks) with the observation camera. It is a figure which shows the image pick-up signal (photoelectric conversion signal) at the time of detecting.
- FIG. 8B is a diagram showing signal waveform data when the light-intensity-independent component of the noise included in the imaging signal shown in FIG. 8A is measured.
- FIG. 8C is a diagram showing signal waveform data when the light quantity dependent component of the noise included in the imaging signal shown in FIG. 8A is measured. .
- FIG. 9 is a diagram showing waveform data obtained by performing signal processing on the imaging signal shown in FIG. 8A based on a predetermined algorithm.
- FIG. 10 is a diagram showing waveform data obtained by performing signal processing on the imaging signal shown in FIG. 8A based on a predetermined algorithm.
- FIG. 11 is a diagram showing waveform data obtained by performing signal processing on the imaging signal shown in FIG. 8A based on a predetermined algorithm.
- FIG. 12 is a diagram showing an example of another embodiment of the mark position measurement operation.
- FIG. 13 is a diagram showing an example of another embodiment of the mark position measurement operation.
- FIG. 14 is a flow chart of the production of a microphone port device using an exposure apparatus according to an embodiment of the present invention.
- FIG. 1 schematically shows the configuration of a reduction projection type exposure apparatus 10 for manufacturing a semiconductor device preferably applied to the present invention.
- the projection exposure apparatus 10 synchronously moves the reticle R as a mask and the wafer W as a substrate in a one-dimensional direction in a synchronous manner, and forms circuit patterns formed on the reticle R in each shot area on the wafer W.
- a projection exposure apparatus 10 comprises: an illumination system 11 including a light source 12; a reticle stage RST for holding a reticle R; a projection optical system PL for projecting an image of a pattern formed on the reticle R onto a wafer W; Wafer stage WST as a substrate stage holding a reticle, reticle alignment microscopes 2 2 A and 2 2 B as a pair of observation means, wafer alignment sensor 2 7, main focus detection system (60 a, 60 b ), JP03 / 06941
- the illumination system 11 includes, for example, an illumination system aperture stop plate in addition to a light source 12 composed of an excimer laser, a lens for beam shaping, and an illuminance equalizing optical system 16 including an optical integrator (fly eye lens) and the like.
- (Revolver) 18 Including relay optical system 20, reticle blind (not shown), folding mirror 37, condenser lens system (not shown) and the like.
- each configuration of the illumination system 11 will be described together with its operation.
- the illumination beam IL excimer laser light (K r F, A r F), etc.
- the illumination uniformizing optical system 16 makes the luminous flux uniform or speckle Reduction, etc. will be implemented.
- the emission of the laser pulse of the light source 12 is controlled by a main control device 13 described later.
- an extra-high pressure mercury lamp may be used as the light source 12.
- emission lines in the ultraviolet region such as g-rays and i-rays, are used as illumination beams, and the opening and closing of a shirt (not shown) is controlled by the main control unit 13.
- An illumination system aperture stop plate 18 formed of a disk-like member is disposed at the exit of the illumination uniformizing optical system 16.
- This illumination system aperture stop plate 18 has substantially equal angular intervals.
- an aperture stop consisting of a normal circular aperture, an aperture stop consisting of a small circular aperture, an aperture stop for reducing the value which is the coherence factor, an annular aperture stop for annular illumination, and A modified aperture stop (all not shown) or the like, which are disposed eccentrically with a plurality of apertures, are arranged for use in the light source method.
- the illumination system aperture stop plate 18 is rotationally driven by a drive system 24 such as a motor controlled by the main control unit 13, whereby any aperture stop is selected on the light path of the illumination beam IL. Selectively placed.
- a relay optical system 20 is installed on the light path of the illumination beam IL behind the illumination system aperture stop plate 18 via a blind (not shown).
- the installation surface of the blind is in a conjugate relationship with Reticle R.
- a bending mirror 37 for reflecting the illumination beam IL passing through the relay optical system 20 toward the reticle R is disposed on the optical path of the illumination beam IL behind the relay optical system 20.
- a condenser lens (not shown) is disposed on the light path of the illumination beam I behind the mirror 1.
- the illumination beam IL defines (restricts) the illumination area of the reticle R with a blind (not shown), and then is bent vertically downward by a mirror 37 so that the illumination beam IL is not shown.
- the pattern area ⁇ ⁇ in the illumination area of the reticle R is averaged
- the reticle R is held by suction on a reticle stage R ST via a vacuum chuck or the like (not shown).
- Reticle stage RST can be moved two-dimensionally in a horizontal plane (XY plane), and after reticle R is placed on reticle stage RST, the central point of pattern area PA of reticle R coincides with optical axis AX. Position will be determined.
- the positioning operation of the reticle stage R ST is performed by controlling a drive system (not shown) by the main controller 13.
- the reticle alignment for initial setting of the reticle R will be described in detail later.
- the reticle R is appropriately replaced and used by a reticle exchange device (not shown).
- the projection optical system PL is composed of a plurality of lens elements having a common Z-axis optical axis A X arranged so as to be a both-side telecentric optical arrangement. Also, as this projection optical system PL, a projection magnification of, for example, 1Z4 or 1Z5 is used. For this reason, as described above, when the illumination area on the reticle R is illuminated by the illumination beam IL, the pattern formed on the pattern surface of the reticle R is exposed on the surface of the resist by the projection optical system PL. The material is reduced and projected onto the coated wafer, and a reduced image of the circuit pattern of reticle R is transferred onto a single shot area on wafer W.
- the wafer stage W ST is mounted on a surface plate (stage surface plate B S) disposed below the projection optical system PL.
- the wafer stage WST is actually composed of an XY stage capable of moving two-dimensionally in a horizontal plane (XY plane), and a Z stage etc. mounted on the XY stage and capable of fine movement in the optical axis direction (Z direction).
- these are represented as wafer stage WS.
- this wafer stage WST is driven in the XY two-dimensional direction along the upper surface of stage base plate BS by drive system 25 and along the optical axis within a minute range (for example, about 100 ⁇ ). It shall be driven also in the ⁇ direction.
- the surface of the stage surface plate B S is processed to be flat, and is uniformly plated with a low-reflectance material (such as black chromium).
- wafer W is placed via wafer holder 52. It is held by vacuum suction or the like.
- the two-dimensional position of the wafer stage WST is constantly detected by a laser interferometer 56 at a predetermined resolution (for example, about 1 nm) via a movable mirror 53 fixed on the wafer stage WST.
- the output of the laser interferometer 56 is given to the main controller 13.
- the drive system 25 is controlled by the main controller 13.
- wafer stage WST exposes the next shot. Stepping to the start position.
- the wafer W is replaced with another wafer W by a wafer exchange device (not shown).
- the wafer exchange apparatus is provided with a wafer transfer system such as a wafer loader which is disposed at a position away from the wafer stage WST and transfers the wafer W.
- the position of the wafer W surface in the Z direction is measured by the main focus detection system.
- the main focus detection system an imaging light beam or a parallel light beam for forming a pinhole or slit image toward the image plane of the projection optical system PL is irradiated from an oblique direction with respect to the optical axis AX.
- Oblique-incident light type consisting of an irradiation optical system 6 0 a and a light receiving optical system 6 O b for receiving a reflected light beam on the surface of a wafer W (or a reference plate WFB described later) of an imaging light beam or a parallel light beam.
- a focus detection system is used, and a signal from the light receiving optical system 60 b is supplied to the main control unit 13.
- the main controller 13 based on the signal from the light receiving optical system 60 b, the surface of the wafer W always comes to the best imaging surface of the projection optical system PL. Control the Z position.
- the control system is mainly configured by the main control unit 13.
- the main controller 13 is composed of a so-called microcomputer (or mini computer) consisting of a CPU (central processing unit), ROM (read 'only memory'), RAM (random 'access' memory), etc. Alignment of reticle R and wafer W (alignment), stepping of wafer W, exposure timing, etc. are integrated and controlled so that the operation is properly performed.
- the main control unit 13 integrally controls the entire apparatus.
- the wafer alignment sensor 27 and the reticle alignment microscope 22 A and 22 B will be described in detail. 0306941
- the wafer alignment sensor 27 is provided with an index serving as a detection reference, and detects the position of the mark based on the index.
- a sensor is used.
- a reference on which various reference marks such as wafer reference marks (wafer fiducial marks) WFM1, WFM2, and WFM3 for reticle alignment and baseline measurement described later are formed on the wafer stage WST.
- Plate WFB is provided.
- the surface position (position in the Z direction) of the reference plate W F B is substantially the same as the surface position of the wafer W.
- the wafer alignment sensor 27 detects the position of the wafer reference mark WFM on the reference plate WFB and the wafer alignment mark on the wafer W, and supplies the detection result to the main control unit 13.
- the wafer alignment sensor for example, other types of sensors such as a laser scan type sensor known in Japanese Utility Model Application Publication No. 10-145, etc. or a laser interference type sensor may be used.
- Reticle alignment microscopes 2 2 A and 22 B respectively include an alignment illumination system for guiding the detection illumination to the reticle R, a search observation system for performing relatively rough detection, and a relatively accurate detection. It consists of a fine observation system etc. for implementation.
- Fig. 2 representatively shows the configuration of the reticle alignment microscope 22A. Since the other reticle alignment microscope 22B has the same configuration and function, the description thereof is omitted here.
- the alignment illumination system uses the exposure light (illumination beam 1; see FIG. 1) as the detection illumination, and branches a part of the luminous flux of the exposure light (illumination beam IL) by a mirror or the like, The light is guided into a reticle alignment microscope 22 A using a fiber, and the light flux is further guided onto a reticle R.
- the alignment illumination system includes a movable mirror 82, a condenser lens 83, an imaging lens 84, a deflection mirror 85 and the like, and is connected to a fine observation system and a search observation system by a half mirror 86. ing.
- the movable mirror 82 is a mirror for switching the light path of the illumination beam IL, and is movable between a first position where the illumination beam IL is not reflected and a second position where the illumination beam IL is reflected.
- a first position where the illumination beam IL is not reflected
- a second position where the illumination beam IL is reflected.
- the position of the movable mirror 82 is selected by the main control unit 13.
- main controller 13 drives drop slope mirror 30 A in the direction of arrow A via a drive system (not shown) and Position the illumination position shown in 2 and drive the falling mirror 30 A in the direction of arrow A 'via the drive system (not shown) so that it will not get in the way of exposure when the alignment is finished. Then, it is evacuated to a predetermined evacuation position.
- the illumination beam guided by the alignment illumination system illuminates the reticle mark RM 1 through the tilt mirror 3 OA, and the wafer reference mark on the reference plate WF B through the reticle R and the projection optical system PL.
- Reflected beams from the reticle mark R M 1 and the wafer reference mark WFM 1 are reflected by the tilt mirror 30 A, respectively, and the reflected beams enter the search observation system and the fine observation system.
- the search observation system includes a search optical system including a falling tilt mirror 30 A, a first objective lens 72, a half mirror 73, a deflection mirror 74 and a second objective lens 75 and a search observation power camera 76.
- the fine observation system includes a fine optical system including a falling-incline mirror 3.0 A, a first objective lens 72, a second objective lens 77 and the like, and a fine observation camera 78.
- an imaging element such as a CCD is used as the search observation camera 76 and the fine observation camera 78, respectively.
- the search observation camera 76 a camera with low sensitivity is used
- the camera 78 for fine observation a camera with high sensitivity is used.
- the magnification is low and the numerical aperture (NA) is set small.
- the magnification is high and the numerical aperture is set large.
- the imaging signals (photoelectric conversion signals) of the search observation camera 76 and the fine observation camera 78 are supplied to the main control unit 13.
- the main control unit 13 sets the movable mirror 82 to the second position, and the alignment illumination system is performed.
- Illuminate 11 The reflected beam from reticle R and reference plate WF B is incident on search observation camera 76 via the search optical system, and the images of reticle mark RM1 and wafer reference mark WFM 1 are simultaneously obtained by search observation camera 76. Image is formed on the light receiving surface. Also, the reflected beam from reticle R and reference plate WF B enters the fine observation camera 78 via the fine optical system, and the images of reticle mark RM and wafer reference mark WFM 1 are simultaneously for fine observation. The light is imaged on the light receiving surface of the camera 78.
- FIG. 3 shows an example of the configuration of reticle marks RM1 and RM2
- FIG. 4 shows an example of the configuration of wafer reference marks WFM1, WFM2 and WFM3.
- the specific shapes of the reticle mark RM and the wafer reference mark WFM are not particularly limited. However, as shown in the figure, it is preferable that the two-dimensional mark be capable of detecting the amount of positional deviation in the two-dimensional direction.
- Reticle marks RM1 and RM2 are provided outside the pattern area on the surface arranged below reticle R, for example, a pattern generator or EB Based on the design data, it is transferred onto a glass plate which is a base material of the reticle R by an apparatus such as an exposure apparatus, and is formed in a predetermined shape as a light shielding portion made of chromium.
- the reticle marks RM1 and RM2 are each configured by combining a cross mark element and a rectangular mark element.
- Wafer reference marks WFM 1, WFM 2, and WFM 3 are formed by arranging mark elements with chromium on an underlying region formed of glass.
- each of the wafer reference marks WF 1, WFM 2 and WFM 3 is a mark element in which linear line patterns extending in the Y-axis direction are periodically arranged in the X-axis direction, and An extended linear line pattern is configured to include mark elements periodically arranged in the Y-axis direction.
- the mark element may be formed of glass on the underlying region formed of chromium as the wafer reference mark WFM.
- the reference plate WF B on which the wafer reference marks WFM 1, WFM 2, and WFM 3 are formed is provided on the wafer stage WST (see FIG. 1). If it is on the stage surface plate BS, other position (for example, on the wafer holder 52 or on the movable mirror 53) 06941
- the fine observation camera 78 has an X-axis camera and a Y-axis camera, and the X-axis camera and the Y-axis camera each have an image in a predetermined imaging area PFX or PFy. Take an image.
- each mark element of the reticle mark RM and the wafer reference mark WFM is formed in a square shape, so the intensity of the beam reflected by the mark element is strong, and as a result,
- the signal waveform data in which the signal strength (V x, V y) has a convex shape is obtained at the portions corresponding to these mark elements.
- Reticle alignment microscopes 2 2 A and 2 2 B search and observation cameras 7 6 and 7 9 for the Fain observation cameras respectively capture the image of the reticle mark RM and the image of the wafer reference mark WFM,
- the photoelectric conversion signal is detected in the dimensional direction and supplied to the main control unit 13.
- Main controller 13 calculates the relative positional relationship between reticle mark RM and wafer reference mark WFM based on a predetermined algorithm, and based on the calculation result, calculates the position and attitude of reticle R. Adjust (recycle). In reticle alignment, after positioning the reticle R relatively coarsely based on the observation results of the search observation system, the precise reticle R is positioned based on the observation results of the fine observation system.
- FIG. 6 is a flowchart showing an example of the procedure of mark position measurement operation accompanying mark alignment, in particular, mark position measurement operation involved with reticle positioning processing (fine alignment processing) using the above-mentioned fine observation system.
- FIG. 6 is a flowchart showing an example of the procedure of mark position measurement operation accompanying mark alignment, in particular, mark position measurement operation involved with reticle positioning processing (fine alignment processing) using the above-mentioned fine observation system.
- the main control unit 13 measures the light quantity non-dependent component of the noise contained in the imaging signals of the reticle alignment microscopes 22A and 22B (step 100). The measurement of noise-independent components of noise is performed in a state where the illumination beam is not observed by reticle alignment microscopes 22A and 22B.
- the movable mirror 82 in the reticle alignment microscope 22 A, 22 B is set to the first position, and the reticle marks RM 1, RM 2 are not illuminated. Acquires the signal of observation camera 7 8.
- the method is not limited to the method of controlling the movable mirror 82 described above, and other means may interrupt the light path of the illumination beam. Good.
- noise of the reticle alignment microscope 22 A, 22 B can be obtained. It is possible to measure the light quantity independent component. This noise component is mainly the dark current component of the observation camera 78.
- the main controller 13 measures the light quantity-independent component of the noise described above, and makes the information appear as an eye.
- the main control unit 13 measures the light quantity dependent component of the noise contained in the imaging signal of the reticle alignment microscopes 2 2 A and 2 2 B (step 101).
- the measurement of the light quantity dependent component of the noise is performed by illuminating the non-mark area different from the mark area where the reticle mark RM and the wafer reference mark WFM are formed on the reticle R and the reference plate WF B, respectively.
- This non-marked area is obtained by imaging through a reticle alignment microscope 22A, 22B. More specifically, in the main control device 13, based on a predetermined design value, the drive system is interposed so that the non-marked area is positioned at the observation position of the reticle microscopes 22A and 22B.
- the reticle stage RST and the wafer stage WS are moved, and the reticle R and the non-marked area on the wafer reference plate WF are observed using the reticle microscope 2 2 A, 22 2.
- the non-marked area is made of the same material as the underlying area on which each mark pattern of reticle mark RM and wafer reference mark WFM is formed. This The light quantity dependent component of noise in the reticle alignment microscopes 2 2 A and 2 2 B can be measured by acquiring a signal obtained by observing the beam generated from the peak area.
- the noise component is a reticle ⁇ Lai instrument microscope 2 2 A, 2 2 B those caused by the fact that bi one beam passes, is in its generated due, for example, observation camera 7 6, 7 For example, the cover glass of 8, the interference fringes generated by the half mirrors 7 3 and 8 6, or the sensitivity variation among a plurality of pixels in the observation camera 7 6 and 7 8.
- Such noise components change substantially in proportion to the light amount of the beam passing through the reticle alignment microscopes 2 2 A and 2 2 B, and tend to be larger as the light amount of the beam is larger.
- the main control unit 13 stores the information upon measuring the light quantity dependent component of the noise described above.
- the timing to measure the noise can be performed at any timing before signal processing of the imaging signal of the mark. For example, it may be performed every predetermined period, or may be performed every time the device is started. Alternatively, environmental factors that affect the noise may be measured, and the noise measurement timing may be determined based on the measurement results. In this case, examples of environmental factors that affect noise include ambient temperature, pressure, and device temperature.
- the dark current component (light quantity independent component) mentioned above tends to change according to the temperature
- the temperature of the observation camera (image sensor) or the temperature around it is periodically measured using a temperature sensor
- the light-insensitive component of noise may be re-measured.
- the cover glass or half mirror of the observation camera described above may be slightly deformed according to temperature and pressure, and the light amount dependent component of noise may be changed accordingly. Therefore, the temperature of the object or the temperature around it may be periodically measured, and the light quantity dependent component of the noise may be remeasured when the temperature change exceeds a predetermined allowable value. In this way, by remeasuring noise based on the measurement results of environmental factors that affect noise, stable position measurement can be performed over a long period of time.
- the light quantity independent component may not necessarily be measured first, and the light quantity dependent component may be measured first.
- the noise is re-measured according to the time-dependent change characteristic of the light quantity dependent component. That is, when the light quantity dependent component has a characteristic that changes with time, the change with time Although the minute is an error, if the noise is re-measured at a sufficiently small time interval with respect to the temporal change, it is possible to cancel the temporal change. If there is no change with time in the light quantity dependent component, the result of measurement may be used continuously.
- the measurement of the noise may be repeated multiple times, and signal processing may be performed using the multiple measurement results. That is, noise measurement may include noise generated by external factors not directly attributable to the reticle alignment microscope, such as random noise of the electrical system. Therefore, the noise measurement error is reduced by measuring the noise (light-quantity-independent component, light-quantity-dependent component) repeatedly several times and averaging the measurement results of the plural times, for example.
- the main control unit 13 actually observes the mark and acquires its imaging signal (step 102). That is, in main controller 13, based on a predetermined design value, the center point of wafer reference marks WFM 1 and WFM 2 on reference plate WF B is positioned on optical axis AX of projection optical system PL. The wafer stage WST is moved while monitoring the output of the laser interferometer 56. Subsequently, in main controller 13, the illumination beam is guided to the reticle using reticle alignment microscopes 2 2 A and 2 2 B, and reticle marks RM 1 and RM 2 on reticle R and the reference plate WFB on reticle R Observe the wafer reference marks WFM 1 and WFM2 simultaneously.
- main controller 13 performs signal processing according to a predetermined algorithm based on the result of simultaneous observation of reticle marks RM1 and RM2 and wafer reference marks WFM1 and WFM2 and the noise measurement result described above. Measure the relative positional relationship between the two marks RM1 and WFM1, and the relative positional relationship between the two marks RM2 and WFM2 (step 103). In the present embodiment, the measurement accuracy can be improved by using the measurement result of noise for signal processing for position calculation.
- 7A and 7B are diagrams for explaining the influence of noise contained in an imaging signal on the measurement of the position of a mark.
- Fig. 7A shows the signal waveform of an ideal mark without noise.
- the amplitude of the signal waveform of the mark is determined from the strength of the mark top T of the imaging signal and the base B 1 on the left side of the mark top T in the figure.
- the amplitude of the signal waveform of the mark is determined from the strength of the mark top T of the imaging signal and the base B2 on the right of the mark top T in the figure, and the slice level SL2 is determined from the amplitude.
- intersection point a1 of the signal waveform on the left side of the top of the mark T in the figure and the slice level SL 1 finds the intersection point a2 of the signal waveform on the right side of the top of the mark T on the slice level SL 2 Find the middle point c of these intersection points a 1 and a 2 as the center of the mark. Note that the relative positional relationship between the two marks can be obtained from the center position of the reticule mark and the center position of the wafer reference mark.
- the method of determining the center position of the mark described above is an example, and the present invention is not limited to this.
- the signal processing algorithm may be determined according to the size and degree of the noise component contained in the imaging signal.
- the influence of the light quantity-independent component of noise such as the bird's-eye current component of the observation camera 78 is eliminated or reduced.
- the influence of light quantity dependent component of noise such as beam interference or sensitivity variation among a plurality of pixels of the imaging device is eliminated or reduced. Be done. Note that the light quantity dependent component of the noise changes in proportion to the light quantity of the imaging beam, and therefore, the light quantity dependent component of the noise is divided with respect to the imaging signal, as compared to the subtraction processing.
- positioning of the reticle R with respect to the projection optical system PL that is, reticle alignment can be performed based on the measurement result of the relative positional relationship.
- the wafer reference mark WFM 3 on the reference plate WFB is observed using the wafer alignment sensor 27, and the relative between the wafer reference mark WFM 3 and the index of the wafer alignment sensor 27.
- a so-called baseline amount That is, since the wafer reference marks WFM 1, WFM 2, and WFM 3 on the reference plate WFB are respectively formed at positions corresponding to a predetermined design positional relationship, the above-mentioned arrangement information on design is described.
- the relative distance (baseline amount) between the projection position of the pattern of the reticle R and the index of the wafer alignment sensor 27 can be calculated from the relative positional relationship obtained by the operation.
- the main control unit 13 sequentially measures the positions of the wafer alignment marks attached to the plurality of shot areas on the wafer W using the wafer alignment sensor 27, and All the shot arrangement data on wafer W is obtained by the EGA method. Then, according to this arrangement data, while sequentially positioning the shot area on the wafer W directly under the projection optical system PL (exposure position), the laser emission of the light source 12 is controlled to perform exposure by the so-called step-and-repeat method. I do. Incidentally, since EGA and the like are known in Japanese Patent Application Laid-Open No. 61-42429 and the like, detailed description thereof is omitted here.
- FIG. 8A shows an imaging signal (photoelectric conversion signal) when observing a mark (a reticle mark and a wafer reference mark) with an observation force camera
- Fig. 8B shows the amount of noise of the noise included in the imaging signal
- FIG. 8C shows the signal waveform data when the light quantity dependent component of noise is measured
- FIG. 8C shows the signal waveform data when the dependent component is measured.
- FIGS. 9 to 11 are based on a predetermined algorithm for the imaging signal shown in FIG. 8A. It shows waveform data subjected to signal processing.
- Dm signal waveform data indicating the light quantity non-dependant component of noise
- Dn b signal waveform data indicating the light quantity dependent component of noise
- D n a signal waveform data after signal processing
- FIG. 9 shows waveform data subjected to the signal processing shown in the following equation (1).
- noise is detected with respect to the processing result obtained by subtracting the signal waveform data (Dn b) of the light quantity independent component of noise from the signal waveform data (Dm) of the mark.
- the processing result obtained by subtracting the signal waveform data (Dn b) of the light amount non-dependent component from the signal waveform data (D na) of the light amount dependent component was divided. As a result, the influence of noise on the imaging signal of the mark was well corrected.
- FIG. 10 shows waveform data subjected to the signal processing shown in the following equation (2).
- the light quantity non-dependant component of noise is subtracted from the signal waveform data (Dm) of the mark.
- Dm signal waveform data
- the influence of noise (light-quantity-independent component) on the imaging signal of the mark was well corrected.
- This example is preferably applied to the case where there are many light quantity independent components contained in noise and there are few light quantity dependent components. Note that, in this example, high throughput can be obtained because simple arithmetic processing can be performed compared to the processing algorithm shown in the above equation (1).
- FIG. 11 shows waveform data subjected to the signal processing shown in the following equation (3).
- the light quantity dependent component of noise is subtracted from the signal waveform data (Dm) of the mark as an algorithm for noise correction.
- Dm signal waveform data
- the influence of noise (light-insensitive component) on the image pickup signal of the mark was well corrected.
- This example is preferable when there are many light quantity dependent components contained in noise and there are few light quantity independent components. Also in this example, high throughput can be obtained because the calculation process is simpler than the processing algorithm shown in the above equation (1).
- the influence of noise on the imaging signal of the mark is well corrected. Therefore, by using this processing waveform data, it is possible to improve the position measurement accuracy of the mark and perform the exposure processing with high accuracy.
- the algorithm for noise correction is not limited to those shown in the above equations (1) to (3).
- signal processing may be performed as in the following equation (4).
- the light quantity dependent component of noise may be divided with respect to the signal waveform data (D m) of the mark as an algorithm for noise removal.
- FIG. 12 shows an example of another embodiment of mark position measurement operation.
- the mark elements excluding the measurement target among the plurality of mark elements included in the mark are not observed instead of observing the non-mark area shown in the above embodiment. Illuminate with an illumination beam and measure the light quantity dependent component of noise from the observation results.
- the observation area PFX including only the mark element M x 1 extending in the X-axis direction to be non-measurement object is illuminated. Measure the light quantity dependent component. Furthermore, when measuring the position in the Y-axis direction, the observation area PF y containing only the mark element M y 1 extending in the Y-axis direction to be not measured is illuminated, and the light quantity dependent component of noise is measure. Then, using the measurement result of the noise component, the position information of the mark in the X-axis direction and Y-axis direction is measured.
- the noise is location dependent in the non-measurement direction, it may not be possible to measure the noise generated by the beam reflected by the non-measurement mark element just by observing the non-marked area.
- the noise component by measuring the noise component as close as possible to the actual mark measurement, it is possible to more accurately reflect the noise influence on the position measurement.
- the intensity of the beam generated from the mask mark may be weak, and the image of the mask mark may not be observed with sufficient contrast.
- a reticle (mask) called a high reflection reticle has high reflectivity of the mask mark to a general illumination beam, and the mask mark can be observed with a relatively high contrast, while the low reflection reticle is
- a reticle (mask) called a halftone reticle has a low reflectivity of the mask mark with respect to the illumination beam
- the intensity of the reflected beam from the mask mark can be observed even if the mask mark is to be observed using the reflected beam.
- the mask mark tends to be observed at weak and low contrast. If the contrast of the observed mask mark is low, the measurement accuracy of the mark position may be reduced. Furthermore, errors are likely to occur when adjusting the focus state of the observation system with respect to the mask marks.
- Wafer reference marks WFM 1 1, 1 2 as shown in FIG. 13 are used as the wafer reference marks shown in FIG. , 13 is used.
- Wafer reference marks WFM 1 1 1 2 1 3 3 include a plurality of marks having different reflectance characteristics with respect to the illumination beam IL described above. Specifically, wafer reference marks WFM 1 1, 1 2 1, 1 3 are formed by the first reference mark FMa in which the mark pattern MPa is formed by chromium on the underlying area formed by glass, and by chromium. And a second reference mark FMb formed of glass with the mark pattern MP b formed on the underlying region.
- the mark patterns MP a and the mark notches MP b are formed in the same shape as each other although they are different materials as described above, and are separated from each other by a predetermined distance in a predetermined direction (for example, Y direction). It is located on the top.
- a predetermined direction for example, Y direction.
- any one of the plurality of fiducial marks FMa and FMb is selectively positioned within the observation field of the reticle alignment microscope 22A, 22B. It is observed.
- reticle R is placed on reticle stage RST, and a pattern has already been formed on wafer W in the steps up to that point. Marks are also being formed.
- the main control unit 13 moves the tilt mirrors 3 OA and 3 OB based on a predetermined design value, and positions the reticle marks RM 1 and RM 2 on the reticle R in the observation field of view.
- main controller 13 based on a predetermined design value, the central point of wafer reference mark WFM 1 1, 1 2, 1 3 on reference plate WF B is on optical axis AX of projection optical system PL
- the wafer stage WST is moved while monitoring the output of the laser interferometer 56 so that it is positioned at.
- each wafer reference mark WFM 1 1, 1 via driving system 25 based on the reflectance characteristic of reticle R with respect to illumination beam IL (exposure light as detection illumination).
- illumination beam IL exposure light as detection illumination.
- the reflectance of reticle marks RM1 and RM2 on reticle R placed on reticle stage RST is a predetermined reflection. If the ratio is higher, the drive system 25 moves the wafer stage WST to selectively position the first fiducial mark FMa of the plurality of fiducial marks FMa and FMb in the observation field of view.
- a low reflection reticle for example, the reflectivity of the mark is about 5 to 10%
- a halftone reticle for example, the reflectivity of the mark is about 5 to 10%
- the drive system 25 selectively positions the second fiducial mark FMb in the observation field of view. Do.
- the reflectance serving as the selection reference is set so that the reticle mark contrast is high when the reticle mark and the wafer reference mark are simultaneously observed. Further, information on characteristics unique to the reticle, such as reflectance characteristics, is stored in advance in the main controller 13 in association with each reticle.
- the illumination beam I While L is guided onto the reticle R, the reticle marks RM 1 and RM 2 on the reticle R and the wafer reference marks WFM 1 1, 1 2 and 13 on the reference plate WF B are simultaneously observed.
- the reflected beam is used.
- a relatively strong beam is generated from the reticle marks RM1 and RM2, and a relatively weak beam is generated from the base region of the glass in the first reference mark FMa.
- the beams generated from reticle marks RM1 and RM2 are observed brightly, and the beams generated from the base region of wafer reference marks WFM1 and WFM2 are observed darker than reticle marks RM1 and RM2.
- reticle marks RM1 and RM2 are observed at high contrast.
- the reflectance of the reticle marks RM 1 and RM 2 on reticle R is low and the second fiducial mark FMb is placed in the field of view of reticle alignment microscopes 22 A and 22 B, then the reticle
- the intensity of the reflected beam generated from the marks RM1 and RM2 is relatively weak, a relatively strong beam is generated from the underlying region of chromium in the second reference mark FMb.
- beams generated from reticle marks RM 1 and RM 2 are observed to be dark, and beams generated from the base region of wafer reference marks WFM 1 and WFM 2 are observed to be brighter than reticle marks RM 1 and RM 2. That is, even in this case, the reticle marks RM and RM 2 are observed at high contrast.
- both the light quantity dependent component of the noise for the first reference mark FMa and the light quantity dependent component of the noise for the second reference mark FMb in FIG. 13 are measured in advance, and the first reference mark FMa and the second reference mark FMb
- the signal may be corrected by selectively using the light quantity dependent components of the two types of noise stored in advance depending on which of the two is selected.
- the relative positional relationship between the glass base marks (the relative positional relationship between FM1 1 a, FM 1 2 a, and FM 1 3 a) and the relative position between the chromium base marks (.FM 1 1 b, FM 1 2 b, Not only the manufacturing error between the relative position of FM 1 3 b), but also the manufacturing error in the glass base mark, that is, the manufacturing error of the mark itself of FM 1 1 a, FM 1 2 a, FM 1 3 a
- the manufacturing error in the glass base mark that is, the manufacturing error of the mark itself of FM 1 1 a, FM 1 2 a, FM 1 3 a
- the distance between the two opposite mark patterns Mpa is as follows: FMa of wafer reference mark WFM11 and FMa of wafer reference mark WFM12
- the spacing may differ due to the influence of manufacturing error. Therefore, the measurement results differ depending on which of the wafer reference marks WFM 1 1, 12 3 and 13 is used for measurement.
- the measurement result is corrected using distance information between mark patterns stored in advance, depending on which mark is used. It is preferable that the same treatment is applied to manufacturing errors in the chromium base mark.
- FIG. 14 is a flowchart of production of a microdevice (semiconductor device) using an exposure apparatus according to an embodiment of the present invention.
- step S 200 design step '
- the functional design of the device eg, Design the circuit of the body device, etc.
- design step S201 mask fabrication step
- a mask is fabricated based on the designed circuit pattern.
- step S 202 wafer production step
- a wafer is produced using a material such as silicon.
- step S 2 0 3 wafer process step
- step S 2 0 4 assembly step
- step S204 includes steps such as an assembly process (dicing, bonding), a packaging process (chip encapsulation) and the like.
- step S 2 0 5 inspection step
- the operation verification test, durability test, etc. of the device fabricated in step S 2 0 4 are performed. After these steps, the device is completed and shipped.
- the position measurement method according to the present invention can be applied to measurement of positional deviation for evaluating whether exposure has been correctly performed or measurement of the drawing accuracy of a photomask on which a pattern image is drawn.
- the number, arrangement position, and shape of the marks formed on the wafer, reticle, reference plate, etc. may be arbitrarily determined.
- the marks on the substrate may be either one-dimensional marks or two-dimensional marks.
- a scanning exposure method for example, step and scan method
- the mask (reticle) and the substrate (wafer) are relatively moved with respect to the exposure illumination beam.
- a static exposure method in which the pattern of the mask is transferred onto the substrate while the mask and the substrate are substantially stationary, such as a step-and-repeat method.
- the peripheral area on the substrate is The present invention can also be applied to an exposure apparatus of the step-and-stitch method in which a pattern is transferred to a plurality of overlapping shot areas, respectively.
- the projection optical system PL may be any of a reduction system, an equal magnification system, and a magnification system, and may be any of a refraction system, a reflection and refraction system, and a reflection system. Furthermore, the present invention can be applied to, for example, a proximity type exposure apparatus which does not use a projection optical system.
- the exposure apparatus to which the present invention is applied g-ray as the exposure illumination light, i line, K r F excimer laser light, A r F excimer laser, F 2 laser, and A r 2 lasers light such as For example, EUV light, X-rays, or charged particle beams such as electron beams or ion beams may be used.
- the light source for exposure is not limited to a mercury lamp or excimer laser, and may be a harmonic generator such as a YAG laser or a semiconductor laser, an SOR, a laser plasma light source, an electron gun or the like.
- the exposure apparatus to which the present invention is applied is not limited to semiconductor device manufacturing, and may be a liquid crystal display device, a display device, a thin film magnetic head, an imaging device (CCD etc.), a micromachine, a DNA chip, etc. It may be used for the manufacture of micro devices (electronic devices), for the manufacture of photomasks and reticles used in exposure apparatuses, and so on.
- the present invention can be applied not only to these exposure apparatuses but also to other manufacturing apparatuses (including inspection apparatuses and the like) used in the device manufacturing process.
- an air floating type using an air bearing or a magnetic floating type using Lorentz force or reactive force may be used.
- the stage may be a type that moves along the guide, or a guide type that does not provide a guide.
- a flat motor as the stage drive system, either one of the magnet unit (permanent magnet) and the armature unit is connected to the stage, and the other of the magnet unit and the armature unit is connected to the stage. It should be provided on the moving surface side (surface plate, base) of In addition, the reaction force generated by the movement of the wafer stage is mechanically released to the floor (ground) using a frame member as described in JP-A-8-166345.
- the present invention is also applicable to an exposure apparatus provided with such a structure.
- the reaction force generated by the movement of the reticle stage may be mechanically released to the floor (ground) using a frame member as described in Japanese Patent Laid-Open No. 8-320224.
- the present invention is also applicable to an exposure apparatus provided with such a structure.
- an exposure apparatus to which the present invention is applied is configured to maintain various mechanical systems including the respective constituent elements recited in the claims of the present application with predetermined mechanical accuracy, electrical accuracy, and optical accuracy.
- Manufactured by assembling In order to ensure these various accuracies, adjustments to achieve optical accuracy for various optical systems and adjustments to achieve mechanical accuracy for various mechanical systems are performed before and after this assembly. For various electrical systems, adjustments are made to achieve electrical accuracy.
- the process of assembling the various subsystems into the exposure system includes mechanical connections, wiring connections of electrical circuits, piping connections of pressure circuits, etc. among the various subsystems. It goes without saying that there is an assembly process for each subsystem before the assembly process from the various subsystems to the exposure apparatus. When the process of assembling the various subsystems into the exposure apparatus is completed, comprehensive adjustment is performed to ensure various accuracies as the entire exposure apparatus. It is desirable to manufacture the exposure system in a clean room where the temperature and humidity and the degree of cleanliness etc are controlled.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
Claims
Priority Applications (4)
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JP2004511771A JPWO2003104746A1 (ja) | 2002-05-31 | 2003-06-02 | 位置計測方法、露光方法、露光装置、並びにデバイス製造方法 |
KR10-2004-7019342A KR20050004258A (ko) | 2002-05-31 | 2003-06-02 | 위치 계측 방법, 노광 방법, 노광 장치 및 디바이스 제조방법 |
AU2003241737A AU2003241737A1 (en) | 2002-05-31 | 2003-06-02 | Position measurement method, exposure method, exposure device, and device manufacturing method |
US10/992,804 US20050062967A1 (en) | 2002-05-31 | 2004-11-22 | Position measurement mehtod, exposure method, exposure device, and manufacturing method of device |
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JP2002-159660 | 2002-05-31 |
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US10/992,804 Continuation US20050062967A1 (en) | 2002-05-31 | 2004-11-22 | Position measurement mehtod, exposure method, exposure device, and manufacturing method of device |
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US (1) | US20050062967A1 (ja) |
JP (1) | JPWO2003104746A1 (ja) |
KR (1) | KR20050004258A (ja) |
CN (1) | CN1656354A (ja) |
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US7126670B2 (en) | 2004-03-31 | 2006-10-24 | Canon Kabushiki Kaisha | Position measurement technique |
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CN101258030B (zh) * | 2005-04-25 | 2011-05-11 | 株式会社爱发科 | 一种打印对准方法 |
JP2006344739A (ja) * | 2005-06-08 | 2006-12-21 | Canon Inc | 位置計測装置及びその方法 |
TWI434326B (zh) * | 2006-09-01 | 2014-04-11 | 尼康股份有限公司 | Mobile body driving method and moving body driving system, pattern forming method and apparatus, exposure method and apparatus, component manufacturing method, and correcting method |
JP4307482B2 (ja) * | 2006-12-19 | 2009-08-05 | キヤノン株式会社 | 位置計測装置、露光装置、およびデバイス製造方法 |
US8665455B2 (en) * | 2007-11-08 | 2014-03-04 | Nikon Corporation | Movable body apparatus, pattern formation apparatus and exposure apparatus, and device manufacturing method |
CN104155810B (zh) * | 2014-07-22 | 2017-01-25 | 京东方科技集团股份有限公司 | 一种掩膜板 |
JP6602954B2 (ja) | 2016-03-18 | 2019-11-06 | 富士フイルム株式会社 | 合焦位置検出装置及び合焦位置検出方法 |
CN108573907B (zh) * | 2017-03-13 | 2021-01-22 | 台湾积体电路制造股份有限公司 | 工件接合装置、工件对位方法以及工件承载装置 |
JP7030569B2 (ja) * | 2018-03-12 | 2022-03-07 | キヤノン株式会社 | 位置検出装置、位置検出方法、インプリント装置及び物品の製造方法 |
EP3667423B1 (en) * | 2018-11-30 | 2024-04-03 | Canon Kabushiki Kaisha | Lithography apparatus, determination method, and method of manufacturing an article |
CN109737969B (zh) * | 2019-03-21 | 2023-07-21 | 孔祥明 | 一种物联网定位信息系统及方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01125823A (ja) * | 1987-11-10 | 1989-05-18 | Nikon Corp | アライメント装置 |
JPH11238668A (ja) * | 1998-02-19 | 1999-08-31 | Nikon Corp | マーク検出方法及びマーク検出装置並びに露光装置 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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US6618209B2 (en) * | 2000-08-08 | 2003-09-09 | Olympus Optical Co., Ltd. | Optical apparatus |
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- 2003-06-02 JP JP2004511771A patent/JPWO2003104746A1/ja not_active Withdrawn
- 2003-06-02 AU AU2003241737A patent/AU2003241737A1/en not_active Abandoned
- 2003-06-02 CN CN03812058.5A patent/CN1656354A/zh active Pending
- 2003-06-02 KR KR10-2004-7019342A patent/KR20050004258A/ko not_active Application Discontinuation
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Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01125823A (ja) * | 1987-11-10 | 1989-05-18 | Nikon Corp | アライメント装置 |
JPH11238668A (ja) * | 1998-02-19 | 1999-08-31 | Nikon Corp | マーク検出方法及びマーク検出装置並びに露光装置 |
Cited By (1)
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US7126670B2 (en) | 2004-03-31 | 2006-10-24 | Canon Kabushiki Kaisha | Position measurement technique |
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JPWO2003104746A1 (ja) | 2005-10-06 |
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US20050062967A1 (en) | 2005-03-24 |
CN1656354A (zh) | 2005-08-17 |
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