WO2006106833A1 - 露光装置及び露光方法、並びにデバイス製造方法 - Google Patents
露光装置及び露光方法、並びにデバイス製造方法 Download PDFInfo
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- WO2006106833A1 WO2006106833A1 PCT/JP2006/306677 JP2006306677W WO2006106833A1 WO 2006106833 A1 WO2006106833 A1 WO 2006106833A1 JP 2006306677 W JP2006306677 W JP 2006306677W WO 2006106833 A1 WO2006106833 A1 WO 2006106833A1
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- Prior art keywords
- liquid
- measurement
- substrate
- stage
- immersion
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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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70216—Mask projection systems
- G03F7/70341—Details of immersion lithography aspects, e.g. exposure media or control of immersion liquid supply
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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
Definitions
- Exposure apparatus Exposure apparatus, exposure method, and device manufacturing method
- the present invention relates to an exposure apparatus and exposure method for exposing a substrate through a liquid, and a device manufacturing method.
- the photolithography process which is one of the manufacturing processes of micro devices (electronic devices) such as semiconductor devices and liquid crystal display devices
- exposure is performed by projecting a pattern formed on a mask onto a photosensitive substrate.
- a device is used.
- This exposure apparatus includes a mask stage that can move while holding a mask, and a substrate stage that can move while holding a substrate.
- the projection optical system projects a mask pattern while sequentially moving the mask stage and the substrate stage. Through the projection exposure.
- miniaturization of patterns formed on a substrate is required in order to increase the density of devices.
- the immersion light path is filled with a liquid, and the substrate is exposed through the liquid.
- An exposure device has been devised.
- Patent Document 1 Pamphlet of International Publication No. 99Z49504
- the liquid in the optical path space on the image plane side of the projection optical system is collected to bring the wet state force into a dry state. Then, the trace of liquid adhesion on the surface of the optical member (closest to the image plane) at the end of the projection optical system that comes into contact with the liquid (hereinafter, the liquid adhesion trace is also referred to as a watermark, even when the liquid is not water). ) May occur. Also, the optical part at the end of the projection optical system Due to the heat of vaporization when the liquid adhering to the surface of the material dries, the optical member at the end has a tendency to be thermally deformed. The occurrence of a watermark or thermal deformation of the optical member at the end of the projection optical system may degrade the optical performance of the projection optical system and reduce the performance of the exposure apparatus.
- the present invention has been made in view of such circumstances, and provides an exposure apparatus and a device manufacturing method that can prevent deterioration in apparatus performance even when performing exposure processing via a liquid. Objective.
- the present invention employs the following configurations corresponding to the respective drawings shown in the embodiments.
- the reference numerals in parentheses attached to each element are merely examples of the element and do not limit each element.
- an exposure apparatus that exposes a substrate (P) through an optical member (PL, LSI) and a liquid (LQ) has a substrate (P).
- a substrate holding member (ST1) that can be held and moved, and a first immersion mechanism that fills the space (K1) between the optical member (PL, LSI) and the substrate holding member (ST1) with liquid (LQ) ( 1) and a movable member that is placed facing the optical member (PL, LSI) instead of the substrate holding member (ST1) while maintaining the liquid (LQ) between the optical member (PL, LSI) (ST2) and the measurement member (65, FM) arranged on the movable member (ST2), and the movable member (ST2) faces the optical member (PL, LSI) across the liquid (LQ)
- the measuring device (60, RA) that performs a predetermined measurement when the measuring member (65, FM) is arranged, and the measuring member when at least the movable member (ST2) is separated from
- the movable member since the movable member is disposed to face the optical member even when the substrate holding member is separated from the optical member, the optical path between the optical member and the optical member is provided. If the space can be continuously filled with the liquid, a predetermined measurement can be performed by using the measurement member arranged on the movable member that moves with force. In addition, when the movable member moves away from the optical member, a liquid immersion area can be formed on the measurement member disposed on the movable member, thus preventing a watermark from being formed on the measurement member. Therefore, the thermal deformation of the measurement member can be suppressed, so that the measurement performance of the measurement device using the measurement member can be prevented from deteriorating. Can be stopped.
- the first holding the substrate (P) is performed.
- the movable member (ST1) and the space (K1) between the optical member (PL, LSI) and the first movable member (ST1) are filled with the liquid (LQ) to form the first immersion region (LR1).
- the optical member (PL, LS) is replaced with the first movable member (ST1).
- a second movable member (ST2) that is placed opposite to 1) and has a measuring member (65, FM) in the contact surface (59) with the liquid (LQ), and the first immersion mechanism (1)
- An exposure apparatus (EX) comprising a second immersion mechanism (2) that forms a second immersion area (LR2) on the measurement member (65, FM) in contact with the liquid (LQ) at a position different from Is provided.
- LR2 second immersion area
- a device manufacturing method using the exposure apparatus (EX) of the above aspect there is provided a device manufacturing method using the exposure apparatus (EX) of the above aspect.
- a device that exhibits the desired performance can be manufactured using the exposure apparatus of the above aspect.
- the space (K1) between the first movable member (ST1) to be held and the optical member (PL, LSI) is filled with liquid (LQ) to form the first immersion region (LR1), and the optical member (PL
- the first movable member (ST1) while exposing the substrate (P) via the liquid (LQ) and the liquid (LQ) and maintaining the first immersion area (LR1) between the optical member (PL, LSI)
- the second movable member (ST2) is placed opposite the optical member (PL, LSI) and the second movable member (ST
- An exposure method is provided in which the second immersion area (LR2) is formed on the measurement member (65, FM) after the measurement member (65, FM) of 2) contacts the liquid (LQ). According to the fourth aspect of the present invention, it is possible to prevent a decrease in accuracy in measurement using the measurement member.
- a device manufacturing method using the exposure method of the above aspect there is provided a device manufacturing method using the exposure method of the above aspect.
- a device can be manufactured using an exposure method that can prevent a decrease in accuracy in measurement using a measurement member.
- FIG. 1 is a schematic block diagram that shows an exposure apparatus according to a first embodiment.
- FIG. 2 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 3 is a plan view of the substrate stage and the measurement stage with the upward force also seen.
- FIG. 4 is a diagram showing an example of a measuring device provided on a measuring stage.
- FIG. 5 is a schematic perspective view showing a second immersion mechanism according to the first embodiment.
- FIG. 6 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 7 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 8 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 9 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 10 is a view for explaining an example of the operation of the exposure apparatus.
- FIG. 11 is a schematic perspective view showing a second immersion mechanism according to the second embodiment.
- FIG. 12 is a diagram for explaining an example of the operation of the second immersion mechanism.
- FIG. 13 is a diagram for explaining an example of the operation of the second immersion mechanism.
- FIG. 14A is a view showing a second immersion mechanism according to a third embodiment.
- FIG. 14B is a view showing a second immersion mechanism according to the third embodiment.
- FIG. 15A is a view showing a second immersion mechanism according to the fourth embodiment.
- FIG. 15B is a view showing a second immersion mechanism according to the fourth embodiment.
- FIG. 16 is a flowchart showing an example of a microdevice manufacturing process.
- Last optical element (Optical member), P ... Substrate, PJ ... Retraction position, PL ... Projection optical system (Optical member), RP -... Substrate replacement position, ST1 ... Substrate stage (Substrate holding member), ST2- "Measurement stage (Movable member)
- FIG. 1 is a schematic block diagram that shows an exposure apparatus EX according to the first embodiment.
- the exposure apparatus EX includes a mask stage MST that can move while holding the mask M, a substrate stage ST1 that can move while holding the substrate P by the substrate holder PH, A movable measurement stage ST2 equipped with at least a part of a measurement device that measures exposure, illumination optical system IL that illuminates mask M on mask stage MST with exposure light EL, and illumination light EL A projection optical system PL that projects the pattern image of the mask M onto the substrate P on the substrate stage ST1 and a control device CONT that controls the overall operation of the exposure apparatus EX.
- Each of the substrate stage ST1 and the measurement stage ST2 can move independently of each other on the base member BP on the image plane side of the projection optical system PL.
- the exposure apparatus EX includes a transport apparatus 300 that transports the substrate P, that is, loads the substrate P onto the substrate stage ST1 and unloads the substrate P from the substrate stage ST1.
- a transport apparatus 300 that transports the substrate P, that is, loads the substrate P onto the substrate stage ST1 and unloads the substrate P from the substrate stage ST1.
- loading and unloading of the substrate P may be performed at different positions, in the present embodiment, loading and unloading of the substrate P are performed at the same position (RP).
- the exposure apparatus EX of the present embodiment is an immersion exposure apparatus to which an immersion method is applied in order to substantially shorten the exposure wavelength to improve the resolution and substantially increase the depth of focus.
- the first immersion mechanism 1 is provided for filling the optical path space K1 of the exposure light EL on the image plane side of the projection optical system PL with the liquid LQ.
- the first immersion mechanism 1 is provided in the vicinity of the image plane side of the projection optical system PL, and includes a first nozzle member 70 having a supply port 12 for supplying the liquid LQ and a recovery port 22 for recovering the liquid LQ, and a supply pipe 13 And a liquid supply device 11 for supplying the liquid LQ to the image plane side of the projection optical system PL via the supply port 12 provided in the first nozzle member 70, and a recovery port provided in the first nozzle member 70 22 and a liquid recovery device 21 for recovering the liquid LQ on the image plane side of the projection optical system PL via a recovery tube 23.
- the first nozzle member 70 is formed in an annular shape so as to surround at least the final optical element LS 1 that is closest to the image plane of the projection optical system PL among the plurality of optical elements constituting the projection optical system PL !,
- the first nozzle member 70 is formed in an annular shape so as to surround at least the final optical element LS 1 that is closest to the image plane of the projection optical system PL among the
- the exposure apparatus EX of the present embodiment includes a substrate P including the projection area AR of the projection optical system PL.
- a local liquid immersion method is adopted in which a liquid LQ liquid immersion area L Rl larger than the projection area AR and smaller than the substrate P is locally formed.
- the exposure apparatus EX uses the first immersion mechanism 1 while transferring at least the pattern image of the mask M to the substrate P, and uses the first optical element LS 1 and the projection optics that are closest to the image plane of the projection optical system PL.
- the optical path space K1 of the EL is filled with liquid LQ to form the immersion area LR1, and the liquid filled in the projection optical system PL and the optical path space K1
- the pattern image of the mask M is projected onto the substrate P and exposed.
- the exposure light EL is incident on the projection optical system PL from the optical element closest to the object plane of the projection optical system PL on which the pattern surface of the mask M (the lower surface in Fig. 1) is arranged. Exits from the last optical element LS I closest to the image plane.
- the optical path space K1 of the exposure light EL between the final optical element LSI and the substrate P is a space on the light emission side of the final optical element LSI.
- the first immersion mechanism 1 fills the optical path space K1 on the light emission side of the final optical element LSI with the liquid LQ.
- the control device CONT supplies a predetermined amount of liquid LQ using the liquid supply device 1 1 of the first immersion mechanism 1 and collects a predetermined amount of liquid LQ using the liquid recovery device 21, thereby reducing the optical path space K1. Fill with liquid LQ and locally form an immersion area LR1 of liquid LQ on substrate P.
- the exposure apparatus EX includes a second immersion mechanism 2 that forms an immersion region LR2 of the liquid LQ on the measurement stage ST2.
- the second immersion mechanism 2 is provided in a position aligned with the first nozzle member 70, and is provided in the second nozzle member 72 having the supply port 32 for supplying the liquid LQ, the supply pipe 33, and the second nozzle member 72.
- a scanning exposure apparatus that exposes a pattern formed on mask M onto substrate P while synchronously moving mask M and substrate P in the scanning direction.
- the synchronous movement direction (scanning direction) between the mask M and the substrate P in the horizontal plane is the Y-axis direction
- the direction orthogonal to the Y-axis direction (non-scanning direction) in the horizontal plane is the X-axis direction and X-axis.
- the direction perpendicular to the Y-axis direction (in this example, the direction parallel to the optical axis AX of the projection optical system PL) is the Z-axis direction.
- the rotation (tilt) directions around the X, Y, and Z axes are 0 X, QY, M3 QZ, respectively.
- the “substrate” includes a substrate such as a semiconductor wafer coated with a photosensitive material (resist), a film such as a protective film.
- the “mask” includes a reticle on which a device pattern to be projected on a substrate is reduced.
- the illumination optical system IL includes an exposure light source, an optical integrator that equalizes the illuminance of a light beam emitted from the exposure light source, a condenser lens that collects the exposure light EL from the optical integrator, a relay lens system, and an exposure. It has a field stop to set the illumination area on the mask M with light EL. The predetermined illumination area on the mask M is illuminated with the exposure light EL having a uniform illuminance distribution by the illumination optical system IL.
- Illumination optical system IL force Dew light emitted EL such as bright lines (g-line, h-line, i-line) and KrF excimer laser light (wavelength 248nm) emitted from mercury lamps Light), vacuum ultraviolet light (VUV light) such as ArF excimer laser light (wavelength 193 nm) and F laser light (wavelength 157 nm).
- ArF excimer laser light is used.
- pure water is used as the liquid LQ.
- Pure water is not only ArF excimer laser light, but also far ultraviolet light (DUV light) such as emission lines (g-line, h-line, i-line) emitted from mercury lamp force and KrF excimer laser light (wavelength 248nm). Can also be transmitted.
- DUV light far ultraviolet light
- emission lines g-line, h-line, i-line
- KrF excimer laser light wavelength 248nm
- the mask stage MST is movable while holding the mask M.
- the mask stage MST holds the mask M by, for example, vacuum suction.
- the mask stage MST is in a plane perpendicular to the optical axis AX of the projection optical system PL, that is, in the XY plane, while holding the mask M by driving a drive device MD including a linear motor controlled by the control device CONT. It can move two-dimensionally and can rotate slightly in the ⁇ Z direction.
- a movable mirror 51 is provided on the mask stage MST.
- a laser interferometer 52 is provided at a position facing the moving mirror 51.
- the position of the mask M on the mask stage MST in the two-dimensional direction and the rotation angle in the ⁇ Z direction are measured in real time by the laser interferometer 52.
- the measurement result of the laser interferometer 52 is output to the control device CONT.
- the control device CONT drives the drive device MD based on the measurement result of the laser interferometer 52 and controls the position of the mask M held on the mask stage MST. Only a part of the laser interferometer 52 (for example, an optical system) is provided to face the movable mirror 51. You may make it do.
- the movable mirror 51 may include not only a plane mirror but also a corner cube (retroreflector).
- the end surface (side surface) of the mask stage MST is mirror-finished.
- a reflective surface formed in this manner may be used.
- the mask stage MST may be configured to be capable of coarse and fine movement disclosed in, for example, Japanese Patent Application Laid-Open No. 8-130179 (corresponding US Pat. No. 6,72 1, 034).
- the projection optical system PL projects the pattern of the mask M onto the substrate ⁇ at a predetermined projection magnification ⁇ , and is composed of a plurality of optical elements, which are held by the lens barrel ⁇ . It is.
- the projection optical system PL is a reduction system having a projection magnification j8 of 1Z4, 1Z5, or 1Z8, for example, and forms a reduced image of the mask pattern in the projection area AR conjugate with the illumination area.
- the projection optical system PL may be any of a reduction system, a unity magnification system, and an enlargement system.
- the projection optical system PL may be any of a refractive system that does not include a reflective optical element, a reflective system that does not include a refractive optical element, and a catadioptric system that includes a reflective optical element and a refractive optical element.
- the final optical element LS1 is closest to the image plane of the projection optical system PL and is exposed from the lens barrel PK.
- the substrate stage ST1 has a substrate holder PH that holds the substrate P, and is movable while holding the substrate P on the substrate holder PH.
- the substrate holder PH holds the substrate P by, for example, vacuum suction.
- a recess 58 is provided on the substrate stage ST1, and the substrate holder PH for holding the substrate P is disposed in the recess 58.
- the upper surface 57 of the substrate stage ST 1 other than the recess 58 is a flat surface that is substantially the same height (level) as the surface of the substrate P held by the substrate holder PH. This is because, during the exposure operation of the substrate P, a part of the liquid immersion region LR1 described above protrudes from the surface of the substrate P and is formed on the upper surface 57.
- the upper surface 57 of the substrate stage ST1 may be substantially the same as the surface of the substrate P. If the optical path space K1 on the image plane side of the projection optical system PL can be continuously filled with the liquid LQ (that is, the immersion area LR can be satisfactorily maintained), the upper surface 57 of the substrate stage ST1 and the substrate holder PH There may be a step between the surface of the substrate P held on the substrate. Further, the substrate holder PH may be formed integrally with a part of the substrate stage ST1, but in this embodiment, the substrate holder PH and the substrate stage ST1 are separately configured, for example, by vacuum suction. The substrate holder PH is fixed in the recess 58.
- Substrate stage ST1 is mounted on base member BP in a state in which substrate P is held via substrate holder PH by driving substrate stage driving device SD1 including a linear motor and the like controlled by control device CONT. It can move two-dimensionally in the XY plane and can rotate slightly in the ⁇ Z direction. Furthermore, the substrate stage ST1 can also move in the Z-axis direction, the 0X direction, and the ⁇ Y direction. Accordingly, the surface of the substrate P held on the substrate stage ST1 can move in directions of six degrees of freedom in the X axis, Y axis, Z axis, 0 X, ⁇ Y, and ⁇ Z directions.
- a movable mirror 53 is provided on the side surface of the substrate stage ST1.
- a laser interferometer 54 is provided at a position facing the movable mirror 53.
- the position and rotation angle of the substrate P on the substrate stage ST1 in the two-dimensional direction are measured in real time by the laser interferometer 54.
- the exposure apparatus EX includes a focus leveling detection system that detects surface position information of the surface of the substrate P held by the substrate stage ST1.
- the laser interferometer 54 for example, an optical system
- the position of the substrate stage ST1 in the Z-axis direction and 0 X, 0
- Details of the exposure apparatus equipped with a laser interferometer capable of measuring the position of the substrate stage ST1 in the Z-axis direction are disclosed, for example, in the Japanese translation of Japanese translation of PCT publication No. 2001-510577 (corresponding to the pamphlet of International Publication No. 1999Z28790).
- a reflective surface formed by mirror-processing a part (side surface, etc.) of the substrate stage ST1 may be used.
- the focus / leveling detection system measures the position information of the substrate P in the Z-axis direction at each of the plurality of measurement points, so that the tilt information (rotation) of the substrate P in the ⁇ X and ⁇ Y directions is measured.
- the plurality of measurement points may be set at least partially within the immersion area LR1 (or projection area AR), or all of these measurement points may be in the immersion area LR1. It may be set outside.
- the laser interferometer 54 can measure the position information of the substrate P in the Z-axis, ⁇ X and ⁇ Y directions, the position information in the Z-axis direction can be measured during the exposure operation of the substrate P.
- the position of the substrate P in the Z-axis, ⁇ X and 0 Y directions is controlled using the measurement results of the laser interferometer 54 at least during the exposure operation without the need to provide a focus and repelling detection system. Even so, [0029]
- the measurement result of the laser interferometer 54 is output to the control device CONT.
- the detection result of the focus' repelling detection system is also output to the control device CONT.
- the control device CONT drives the substrate stage drive device SD 1 based on the detection result of the focus leveling detection system, and drives the focus position (Z position) and tilt angle ( ⁇ X, ( ⁇ ) is controlled to align the surface of the substrate P with the image plane formed via the projection optical system PL and the liquid LQ, and based on the measurement result of the laser interferometer 54, the X-axis direction of the substrate P , Position control in Y axis direction and ⁇ Z direction.
- the measurement stage ST2 is equipped with various measurement devices that perform measurement related to the exposure processing, and is provided on the image plane side of the projection optical system PL so as to be movable on the base member BP. Measurement stage ST2 is driven by measurement stage drive device SD2. The measurement stage drive SD2 is controlled by the controller CONT. Then, the control device CONT can move the substrate stage ST1 and the measurement stage ST2 independently of each other on the base member BP via the stage drive devices SD1 and SD2.
- the measurement stage drive device SD2 has the same configuration as the substrate stage drive device SD1, and the measurement stage ST2 is driven by the measurement stage drive device SD2 in the same way as the substrate stage ST1, X-axis, Y-axis, and Z-axis.
- a movable mirror 55 is provided on the side surface of the measurement stage ST2, and a laser interferometer 56 is provided at a position facing the movable mirror 55.
- the position and rotation angle of measurement stage ST2 are measured in real time by laser interferometer 56, and controller CONT controls the position of measurement stage ST2 based on the measurement result of laser interferometer 56.
- controller CONT controls the position of measurement stage ST2 based on the measurement result of laser interferometer 56.
- the laser interferometer 56 for example, an optical system
- the rotation angle of the direction may be measurable.
- a reflecting surface formed by mirror processing a part (side surface, etc.) of the measurement stage ST2 may be used.
- a measuring device mounted on the measuring stage ST2 for example, a plurality of fiducial marks are formed as disclosed in Japanese Patent Laid-Open No. 5-21314 (corresponding US Pat. No. RE36,730).
- Reference mark plate for example, Japanese Patent Laid-Open No. 57-117238 (corresponding As disclosed in U.S. Pat. No. RE32,795), as disclosed in JP 2001-267239 (corresponding U.S. Pat. No. 6,721,039).
- Non-uniformity sensor for measuring the variation in transmittance of the exposure light EL of the projection optical system PL disclosed in Japanese Patent Application Laid-Open No. 2002-14005 and Japanese Patent Application Laid-Open No.
- the measurement stage ST2 is a dedicated stage for performing the measurement process related to the exposure process and does not hold the substrate P !, and the substrate stage ST1 performs the measurement related to the exposure process.
- the measurement device to be used is not installed.
- JP-A-11-135400 corresponding international publication 1999/23692
- JP-A-2000-164504 corresponding US Pat. No. 6,897.
- No. 963 the like.
- the upper surface 59 of the measurement stage ST2 is provided at a position aligned with the upper surface 57 of the substrate stage ST1 including the surface of the substrate P.
- the upper surface 59 of the measurement stage ST2 and the upper surface 57 of the substrate stage ST1 are measured.
- the upper surface 59 of the stage ST2 is controlled so that, for example, at least one of the stages ST1 and ST2 is driven in the Z-axis direction (and in the Z or ⁇ X, ⁇ Y directions) so that they are almost at the same height ( Adjustment).
- a mask alignment system RA is also provided, which also has TTR alignment system power using light of the exposure wavelength for simultaneous observation.
- light exposure light EL
- a mark as disclosed in, for example, Japanese Patent Laid-Open No. 7-176468 (corresponding US Pat. No. 6,498,352).
- the VRA Visual 'Reticle' Alignment
- the masking system RA detects a reference mark (first reference mark) on the substrate mark plate via the projection optical system PL and the liquid LQ.
- the alignment mark on the substrate P and the fiducial mark on the fiducial mark plate FM provided on the measurement stage ST2 (second fiducial mark) FM2 are detected.
- Alignment ALG is established. In the alignment type ALG of this embodiment, for example, a broadband detection that does not expose the photosensitive material on the substrate P as disclosed in Japanese Patent Laid-Open No.
- the target mark is irradiated with the light beam, and the target mark image formed on the light-receiving surface by the reflected light of the target mark force and the image of the index (not shown) (index pattern on the index plate provided in the alignment system ALG)
- the FIA (field image alignment) method is used, which measures the position of the mark by using an image sensor (CCD, etc.) and processing the image signals.
- the alignment system ALG detects the alignment mark on the substrate P and the reference mark (second reference mark) FM2 on the reference mark plate FM without using the liquid LQ.
- the liquid supply device 11 of the first immersion mechanism 1 supplies the liquid LQ to fill the optical path space K1 on the light emission side of the final optical element LS 1 with the liquid LQ, and contains the liquid LQ. It is equipped with a tank, a pressure pump, a temperature adjustment device that adjusts the temperature of the supplied liquid LQ, and a filter unit that removes foreign matter from the liquid LQ.
- a supply pipe 13 is connected to the liquid supply apparatus 11, and the other end of the supply pipe 13 is connected to the first nozzle member 70.
- the liquid supply operation of the liquid supply device 11 is controlled by the control device CONT. Note that the tank, pressure pump, temperature adjustment mechanism, filter unit, etc. of the liquid supply device 11 do not have to be all equipped with the exposure apparatus EX. Also good.
- the liquid recovery device 21 of the first immersion mechanism 1 is for recovering the liquid LQ filled in the optical path space K1 on the light emission side of the final optical element LSI, and is a vacuum such as a vacuum pump. System, a gas-liquid separator that separates the recovered liquid LQ and gas, and a tank that stores the recovered liquid LQ.
- One end of a recovery pipe 23 is connected to the liquid recovery apparatus 21, and the other end of the recovery pipe 23 is connected to a first nozzle member 70.
- the liquid recovery operation of the liquid recovery device 21 is controlled by the control device CONT.
- the vacuum system, gas-liquid separator, tank, etc. of the liquid recovery device 21 do not have to be all equipped with the exposure device EX. Alternatively, facilities such as a factory where the exposure apparatus EX is installed may be substituted.
- the supply port 12 for supplying the liquid LQ and the recovery port 22 for recovering the liquid LQ are formed on the lower surface of the first nozzle member 70.
- the lower surface of the first nozzle member 70 is set to be substantially parallel to the XY plane, and when the substrate stage ST1 and the measurement stage ST2 are respectively disposed facing the projection optical system PL (final optical element LSI), The position is set so that a predetermined gap is formed between the upper surfaces 57 and 59 and the surface of the substrate P.
- the first nozzle member 70 is an annular member provided so as to surround at least the side surface of the final optical element LSI, and a plurality of supply ports 12 are provided on the lower surface of the first nozzle member 70 so as to surround the optical path space K1. It has been.
- the recovery port 22 is provided on the lower surface of the first nozzle member 70 outside the supply port 12 with respect to the optical path space K1, and surrounds the optical path space K1 (final optical element LSI) and the supply port 12. It is provided in an annular shape. Further, the collection member 22 of the present embodiment is provided with a porous member.
- the porous member is made of, for example, a ceramic porous body or a titanium plate mesh.
- the configuration of the first nozzle member 70 is not limited to that shown in FIG. That is, in this embodiment, the force in which the lower surface of the first nozzle member 70 is set to substantially the same height (Z position) as the lower end surface (exit surface) of the projection optical system PL is not limited to this.
- the lower surface of the member 70 may be set closer to the image plane side (substrate side) than the lower end surface of the projection optical system PL.
- a part (lower end) of the first nozzle member 70 may be provided so as to be embedded under the projection optical system PL (final optical element LSI) so as not to block the exposure light EL.
- the supply port 12 is provided on the lower surface of the first nozzle member 70.
- the present invention is not limited to this.
- the first nozzle member 70 facing the side surface of the final optical element LSI of the projection optical system PL is used.
- a supply port 12 may be provided on the inner side surface (inclined surface) of this.
- the control device CONT supplies a predetermined amount of liquid LQ from the liquid supply device 11 of the first liquid immersion mechanism 1, and uses the liquid recovery device 21 of the first liquid immersion mechanism 1 to supply a predetermined amount of liquid LQ.
- the control device CONT drives each of the liquid supply device 11 and the liquid recovery device 21 of the first liquid immersion mechanism 1.
- the liquid supply device 11 When the liquid LQ is delivered from the liquid supply device 11 under the control of the control device CONT, the liquid supply The liquid LQ delivered from the feeding device 11 flows through the supply pipe 13 and then passes through the supply flow path formed in the first nozzle member 70 to the image plane side of the projection optical system PL from the supply port 12. Is supplied to the optical path space K1.
- the liquid recovery device 21 When the liquid recovery device 21 is driven under the control device CONT, the liquid LQ in the optical path space K1 on the image plane side of the projection optical system PL is formed inside the first nozzle member 70 through the recovery port 22. It flows into the collected recovery channel, flows through the recovery pipe 23, and is recovered by the liquid recovery device 21.
- the immersion area LR1 formed by the first immersion mechanism 1 on the light exit side of the final optical element LSI of the projection optical system PL is on the substrate stage ST1 and the measurement stage ST2. It is possible to move between.
- the control device CONT uses the stage drive devices SD1 and SD2 to measure the substrate stage ST1 while the substrate stage ST1 and the measurement stage ST2 are in contact with each other.
- the stage ST2 is moved together in the same direction (for example, the X-axis direction), and the liquid immersion area LR1 formed by the first liquid immersion mechanism 1 is moved to the final optical element LSI (and the first nozzle member 70) of the projection optical system PL.
- the upper surfaces 57 and 59 of the substrate stage ST1 and the measurement stage ST2 are set to almost the same height (Z position) and are driven in parallel. In this way, the liquid LQ is prevented from flowing out of the gap (gap) between the substrate stage ST1 and the measurement stage ST2, and the optical path space K1 on the image plane side of the projection optical system PL is filled with the liquid LQ.
- the immersion area LR1 can be moved between the plate stage ST1 and the measurement stage ST2.
- FIG. 3 is a plan view of the substrate stage ST1 and the measurement stage ST2 as viewed from above.
- the reference mark plate FM described above is arranged on the upper surface 59 of the measurement stage ST2.
- the fiducial mark (first fiducial mark) FM1 detected by the mask alignment RA and the fiducial mark (second fiducial mark) FM2 detected by the alignment ALG have a predetermined positional relationship. Is formed.
- the reference mark plate FM is used to define the alignment position of the substrate P with respect to the pattern image of the mask M via the projection optical system PL, in the XY plane between the projection position of the pattern image and the detection reference of the alignment system ALG. Used to measure the positional relationship (baseline amount).
- the mask alignment system RA measures the fiducial mark FM1 on the fiducial mark plate FM via the projection optical system PL and the liquid LQ, and the measurement using the fiducial mark plate FM is performed.
- the control stage CONT is facing the measurement stage ST2 and the projection optical system PL (final optical element LSI)
- the final optical element LSI and the fiducial mark plate FM (first fiducial mark FM1)
- the reference mark plate FM is filled with the liquid LQ (i.e., at least a part of the reference mark plate FM (at least the first reference mark FM1 in this example) is disposed in the immersion area LR1).
- the reference mark plate FM is arranged on the measurement stage ST2 and functions as a measurement member that constitutes a measurement apparatus that performs measurement related to the exposure process in a state where the liquid LQ is filled with the final optical element LSI. .
- an upper plate 65 constituting a part of the above-described aerial image measurement sensor is provided as a measurement member. Note that an upper plate constituting a part of the above-described unevenness sensor, an upper plate constituting a part of the dose sensor, and the like are also arranged on the upper surface 59 of the force measurement stage ST2 (not shown).
- the upper surface of the fiducial mark plate FM and the upper surface 65 of the aerial image measurement sensor 60 are substantially flush with the upper surface 59 of the measurement stage ST2. That is, the upper surface 59 of the measurement stage ST2 and the upper surface of each measurement member are provided so as to be substantially the same height (level), and the upper surface 59 of the measurement stage ST2 includes the upper surface of each measurement member. It becomes. It is desirable that the upper surface 59 and Z of the measurement stage ST2 or the upper surface of each measurement member be liquid repellent with respect to the liquid LQ.
- FIG. 4 is a diagram showing the aerial image measurement sensor 60.
- the aerial image measurement sensor 60 is used for measuring the imaging characteristics (optical characteristics) of the projection optical system PL.
- the aerial image measurement sensor 60 includes an upper plate 65 arranged on the measurement stage ST2 and a light receiving element (photoelectric conversion element force). (Optical sensor) 68 and an optical system 67 for guiding the light that has passed through the upper plate 65 to the light receiving element 68.
- the upper plate 65 includes a light shielding film 62 that is provided with a chromium isotropic force provided at the center of the upper surface of the glass plate member 64 that is rectangular in plan view, and the periphery of the light shielding film 62, that is, the upper surface of the glass plate member 64.
- a reflective film 63 having an aluminum isotropic force provided in a portion other than the light shielding film 62 and a slit portion 61 that is an opening pattern formed in a part of the light shielding film 62 are provided.
- the glass plate member 64 which is a transparent member is exposed, and light can pass through the slit portion 61. That is, the slit part 61 functions as a light transmission part formed in the upper plate 65.
- the light receiving element 68 receives light (exposure light EL) that has passed through the projection optical system PL and the liquid LQ via the upper plate 65 (slit portion 61) and the optical system 67.
- the optical system 67 includes a first optical element 66 disposed in a position close to the upper plate 65 in the internal space of the measurement stage ST2.
- the first optical element 66 is disposed integrally with the glass plate member 64 below the slit 61 in the internal space of the measurement stage ST2.
- the numerical aperture NA of the projection optical system PL for immersion is 1 or more, the light from the projection optical system PL does not pass through the gas part, the liquid LQ, and the slit part 61 , And the first optical element 66 can be irradiated by the person through the glass plate member 64.
- a photoelectric conversion element capable of accurately detecting weak light for example, a photo 'multiplier' tube (PMT, photomultiplier tube) or the like is used.
- the photoelectric conversion signal from the light receiving element 68 is sent to the control device CONT via a signal processing device or the like.
- the mask stage MST holds a measurement mask on which an aerial image measurement pattern is formed. Then, the control device CONT fills the space between the projection optical system PL and the upper plate 65 with the liquid LQ using the first liquid immersion mechanism 1 with the projection optical system PL and the measurement stage ST2 facing each other. Thus, the liquid immersion region LR1 is formed on the upper plate 65 so that the slit portion 61 is covered with the liquid LQ. As described above, the liquid immersion region LR1 is movable between the substrate stage ST1 and the measurement stage ST2.
- the control device CONT starts the liquid LQ supply operation using the first liquid immersion mechanism 1 in a state where the projection optical system PL and the substrate stage ST1 are opposed to each other.
- the immersion area LR1 After forming the immersion area LR1, its shape
- the immersion area LR1 can be formed on the upper plate 65 of the measurement stage ST2 by moving the formed immersion area LR1 onto the measurement stage ST2. If the immersion area LR1 is formed on the substrate stage ST1 prior to the above measurement, just move the immersion area LR1 onto the measurement stage ST2.
- the control device CONT emits the exposure light EL from the illumination optical system IL.
- the exposure light EL is irradiated onto the upper plate 65 after passing through the measurement mask, the projection optical system PL, and the liquid LQ in the immersion area LR1.
- the light that has passed through the slit portion 61 of the upper plate 65 enters the first optical element 66 in the optical system 67.
- the light condensed by the first optical element 66 is guided to the light receiving element 68 by an optical system 67 including the first optical element 66.
- the aerial image measurement sensor 60 uses the light receiving element 68 to expose the exposure light EL through the liquid LQ between the final optical element LSI and the upper plate 65 and the slit 61 formed in the upper plate 65.
- the light receiving element 68 outputs a photoelectric conversion signal (light amount signal) corresponding to the received light amount to the control device CONT via the signal processing device.
- the control device CONT performs predetermined calculation processing based on the light reception result of the light receiving element 68! ⁇ ⁇ Find the imaging characteristics through the projection optical system PL and liquid LQ.
- the entire aerial image measurement sensor 60 is not necessarily provided in the measurement stage ST2.
- a part of the optical system 67 and Z or the light receiving element 68 may be arranged on a member different from the measurement stage ST2.
- the force used in the present embodiment is to use a measurement mask.
- the measurement pattern of the mask M used for pattern formation or the mask is not limited to this. Use the reference pattern formed on the stage MST.
- the force described as an example of the measurement operation using the aerial image measurement sensor 60 is also used when the controller CONT performs the predetermined measurement using the above-described unevenness sensor.
- the immersion mechanism 1 is used to fill the space between the final optical element LSI and the upper plate that forms part of the unevenness sensor placed on the measurement stage ST2, with the liquid LQ, and the light transmission part formed on the liquid LQ and the upper plate.
- the exposure light EL is received through and.
- the control device CONT is disposed on the final optical element LS 1 and the measurement stage ST2 using the first immersion mechanism 1.
- the space between the upper plate and a part of the dose sensor is filled with liquid LQ, and the exposure light EL passes through the liquid LQ and the light transmission part formed on the upper plate. Is received.
- the control device CONT is arranged on the final optical element LSI and the measurement stage ST2 using the first immersion mechanism 1 when the measurement stage ST2 faces the final optical element LSI. Measurement is performed using each measuring device while the space between the upper plate 65 and the reference mark plate FM is filled with liquid LQ. The result of the operation using the measurement device is reflected in subsequent exposure operations.
- the measurement stage ST2 is arranged at a position facing the final optical element LSI by exchanging with the substrate stage ST1, so that the substrate stage ST1 is removed from the final optical element LSI, for example, for exchanging the substrate P.
- the optical path space K1 on the light exit side of the final optical element LSI continues to be filled with the liquid LQ (that is, the immersion area LR1 is maintained between the final optical element LSI (and the first nozzle member 70)). Can keep (hold)). Further, when the substrate stage ST1 is disposed opposite the final optical element LSI by exchanging with the measurement stage ST2, the optical path space K1 can be continuously filled with the liquid LQ.
- the measurement stage ST2 faces the final optical element LSI, it is not necessary to use all measurement devices and measurement members mounted on the measurement stage ST2. do it.
- a measurement operation using the aerial image measurement sensor 60 may be executed after completion of exposure of a certain substrate P, and a measurement operation using the reference mark plate FM may be executed after completion of exposure of the next substrate P. .
- the substrate stage ST1 when the substrate stage ST1 is disposed at a position facing the final optical element LSI for the exposure operation of the substrate P, and the measurement stage ST2 is separated from the final optical element LSI (that is, by the measurement stage ST2).
- the liquid immersion area LR2 is formed on the measurement member arranged on the measurement stage ST2 by the second liquid immersion mechanism 2.
- the measurement stage ST2 In a state where the substrate stage ST1 is disposed at a position facing the final optical element LS1, the measurement stage ST2 is moved to a predetermined position (retracted position) PJ away from the projection optical system PL.
- FIG. 5 shows the second immersion mechanism 2.
- the second immersion mechanism 2 measures the second nozzle member 72 having the supply port 32 for supplying the liquid LQ, the supply pipe 33, and the supply port 32 provided in the second nozzle member 72. Also used for the first immersion mechanism 1 on stage ST2.
- the second immersion mechanism 2 supplies the liquid LQ onto the measurement member arranged on the measurement stage ST2, and locally places the liquid LQ immersion region LR2 on a part of the measurement stage ST2 including the measurement member.
- the second nozzle member 72 is provided at a predetermined position PJ away from the first nozzle member 70 and the projection optical system PL.
- the supply port 32 of the second nozzle member 72 is disposed so as to face the measurement member on the measurement stage ST2 when the measurement stage ST2 moves to a predetermined position (retracted position) PJ away from the projection optical system PL.
- the second nozzle member 72 (72A, 72B) of the second immersion mechanism 2 is configured such that the top plate 65 and the reference mark of the aerial image measurement sensor 60 are moved when the measurement stage ST2 is moved to the retracted position PJ.
- a plurality of (two) supply ports 32 may be provided so as to face each of the plates FM (in this example, in particular, the first fiducial mark FM1). That is, the supply port 32 of the second nozzle member 72A and the upper plate 65 face each other, and the supply port 32 of the second nozzle member 72B and the reference mark plate FM face each other.
- the liquid supply device 31 of the second liquid immersion mechanism 2 includes the liquid LQ liquid immersion region LR2 on at least a part of the upper plate 65 and the reference mark plate FM of the measurement stage ST 2 arranged at the retracted position PJ. It has a tank for storing liquid LQ, a pressure pump, a temperature adjusting device for adjusting the temperature of the supplied liquid LQ, and a filter unit that removes foreign matter in the liquid LQ.
- One end of a supply pipe 33 is connected to the liquid supply device 31, and the other end of the supply pipe 33 is connected to each of the second nozzle members 72A and 72B.
- an internal flow path (supply flow path) for connecting the supply pipe 33 and the supply port 32 is formed inside the second nozzle member 72.
- the liquid supply operation of the liquid supply device 31 is controlled by the control device CONT.
- the tank, pressure pump, temperature adjustment mechanism, filter unit, etc. of the liquid supply device 31 are not necessarily equipped with the exposure apparatus EX, but can be replaced with equipment at the factory where the exposure apparatus EX is installed. May be.
- the control device CONT makes the liquid material from the liquid supply device 31 to the supply port 32 in a state where the second nozzle member 72, the upper plate 65 on the measurement stage ST2, and the reference mark plate FM are opposed to each other.
- the liquid LQ immersion region LR2 can be formed on at least a part of the upper plate 65 and the reference mark plate FM.
- the control device CONT When the liquid LQ is delivered from the liquid supply device 31, the liquid LQ delivered from the liquid supply device 31 flows through the supply pipe 33 formed in the second nozzle member 72 after flowing through the supply pipe 33. Then, it is supplied from the supply port 32 onto the measurement stage ST2.
- the second immersion mechanism 2 supplies at least the slit portion 61 of the upper plate 65 and the reference by supplying a predetermined amount of liquid LQ onto the upper plate 65 and the reference mark plate FM via the supply port 32.
- a liquid LQ immersion area LR2 is formed to cover the first fiducial mark FM1 of the mark plate FM.
- the second immersion mechanism 2 stops supplying the liquid LQ after supplying a predetermined amount of the liquid LQ from the supply port 32.
- the reference mark plate during the supply of the liquid LQ from the supply port 32 and during a predetermined time thereafter, the second nozzle member 72 and the upper plate 65 on the measurement stage ST2, the reference mark plate The relative positional relationship with the FM is maintained, and the liquid LQ is well held between the second nozzle member 72, the upper plate 65, and the reference mark plate FM.
- FIG. 6 is a view of the substrate stage ST1 and the measurement stage ST2 as viewed from above.
- the control device CONT executes a predetermined measurement process using the measurement member on the measurement stage ST2.
- An example of this measurement is the baseline ALG alignment measurement.
- the control device CONT makes the final optical element LSI of the projection optical system PL and the measurement stage ST2 face each other, and the first reference mark FM1 on the reference mark plate FM provided on the measurement stage ST2 and the first reference mark FM1.
- the mask alignment mark on the corresponding mask M is detected using the above mask alignment RA, and the positional relationship between the first reference mark FM1 and the corresponding mask alignment mark is detected.
- the control device CONT detects the second fiducial mark FM2 on the fiducial mark plate FM with the alignment system ALG, thereby determining the positional relationship between the alignment reference position of the alignment system ALG and the second fiducial mark FM2.
- the control device CON T uses the first immersion mechanism 1 to move the liquid LQ between the projection optical system PL and the reference mark plate FM (first reference mark F Ml). Measured using the mask alignment RA while satisfying the above conditions.
- the control device CONT then sends the first fiducial mark FM1 and the corresponding mask feature.
- the control device CONT moves the substrate stage ST1 to the substrate replacement position RP, and V, Then, the substrate P to be exposed is loaded onto the substrate stage ST1 using the transfer device 300. In this way, the controller CONT releases the maintenance (holding) of the liquid immersion area LR1 by the substrate stage ST1 when the substrate stage ST1 is separated from the projection optical system PL, for example, to replace the substrate P.
- the measurement stage ST2 is arranged at a position facing the final optical element LSI.
- control device CONT uses the first immersion mechanism 1 when the measurement stage ST2 faces the final optical element LSI, and uses the first immersion mechanism 1 to measure the measurement member disposed on the final optical element LSI and the measurement stage ST2. Measurement with each measuring device is performed with the liquid LQ in between.
- the measurement operation using the measurement stage ST2 is not limited to the baseline measurement, and includes a measurement operation using the aerial image measurement sensor 60.
- the control device CONT places the immersion area LR1 formed by the first immersion mechanism 1 on the upper plate 65 of the measurement stage ST2. Deploy. Then, as described with reference to FIG. 4, the exposure light EL is received through the liquid LQ between the projection optical system PL and the upper plate 65 and the slit portion 61 formed in the upper plate 65. The imaging characteristics of the projection optical system PL are measured. Similarly, measurement processing using an unevenness sensor and Z or a dose sensor is performed as necessary. Based on the measurement result, the control device CONT reflects in the subsequent exposure of the substrate P, for example, by performing a calibration process (for example, adjustment of imaging characteristics) of the projection optical system PL.
- the control device CONT drives the stage. After moving at least one of the substrate stage ST1 and measurement stage ST2 using the devices SD1 and SD2 and bringing the measurement stage ST2 and substrate stage ST1 into contact (or close proximity) as shown in FIG. While maintaining the correct positional relationship, move in the XY plane and perform alignment processing on the replaced substrate P. Specifically, the control device CONT detects the alignment mark on the substrate P after replacement by the alignment system ALG, and the position coordinates (array coordinates) of each of the plurality of shot areas provided on the substrate P. To decide.
- the control device CONT maintains the relative positional relationship between the substrate stage ST1 and the measurement stage ST2 in the X-axis direction, while using the stage drive devices SD1 and SD2, and the substrate stage ST1. Move together with the measurement stage ST2 in the X direction. At this time, the substrate stage ST1 and the measurement stage ST2 may be moved in the + Y direction or the Y direction.
- the control device CONT is formed between the final optical element LSI of the projection optical system PL and the upper surface 59 of the measurement stage ST2 by moving the substrate stage ST1 and the measurement stage ST2 together.
- the region LR1 can be moved from the upper surface 59 of the measurement stage ST2 to the upper surface 57 of the substrate stage ST1. As shown in FIG.
- the final optical element LSI of the projection optical system PL and the substrate stage ST1 ( The liquid LQ is held between the substrate P) and the liquid LQ immersion area LR1 formed by the first immersion mechanism 1 is placed on the upper surface 57 of the substrate stage ST1 including the surface of the substrate P. Is done.
- control device CONT performs immersion exposure of the substrate P.
- the control device CONT separates the substrate stage ST1 from the measurement stage ST2 and makes the projection optical system PL and the substrate P on the substrate stage ST1 face each other as shown in FIG.
- measurement stage ST2 is moved to retracted position PJ.
- the substrate stage ST1 and the measurement stage ST2 do not collide, after the alignment process is completed, the substrate stage ST1 and the measurement stage ST2 are brought into contact (or approached). Also good. Alternatively, the substrate stage ST1 and the measurement stage ST2 may be brought into contact (or approached) during the alignment process. In addition, if the movement of the immersion area LR1 from the measurement stage ST2 to the substrate stage ST1 is completed during the alignment process, the substrate stage ST1 and the measurement stage ST2 are separated during the alignment process and the measurement is performed. Move stage ST2 to retraction position PJ.
- control device CONT performs an exposure operation on the substrate P, and sequentially transfers the pattern of the mask M to each of the plurality of shot regions on the substrate P.
- the alignment of each shot area on the substrate P with respect to the mask M is measured immediately before the position coordinates of the plurality of shot areas on the substrate P obtained as a result of the alignment mark detection on the substrate P described above. Based on the baseline information.
- the substrate stage ST1 While the substrate stage ST1 is disposed at a position facing the final optical element LSI of the projection optical system PL and the exposure processing of the substrate P is performed, the substrate stage ST1 is separated from the final optical element LSI of the projection optical system PL.
- a liquid immersion area LR2 for the liquid LQ is formed by the second liquid immersion mechanism 2 on at least a part of the upper plate 65 and the reference mark plate FM of the measurement stage ST2 arranged at the retracted position PJ.
- the control device CONT supplies liquid from the supply port 32 of the second nozzle member 72 to the upper plate 65 and the reference mark plate FM on the measurement stage ST2 moved to the retracted position PJ. Supply LQ.
- the liquid LQ supplied from the supply port 32 spreads on the upper plate 65 and the reference mark plate FM, and is held between the second nozzle member 72 and the upper surface 59 of the measurement stage ST2 including the upper surface of the measurement member.
- the immersion area LR2 is formed on at least a part of the upper plate 65 and the reference mark plate FM.
- the liquid LQ is between the tip of the second nozzle member 72 and the upper surface 59 of the measurement stage ST2 including the measurement member. In good condition.
- the second immersion mechanism 2 is configured such that the liquid is applied to a part of the upper plate 65 of the aerial image measurement sensor 60 and a part of the reference mark plate FM (including the first reference mark FM1).
- the force forming the liquid immersion area L R2 of the LQ The liquid immersion area LR2 of the liquid LQ can be formed so as to cover the entire upper plate 65 and the entire reference mark plate FM.
- the first immersion mechanism is provided on the upper plate 65 and the reference mark plate FM of the measurement stage ST2. 1
- the liquid immersion area LRl is formed, but after moving the liquid immersion area LR1 to the upper plate 65 and the reference mark plate FM, the liquid LQ of the liquid immersion area LR1 moves to the upper plate 65 and the reference mark plate FM. If it remains in the substrate, various inconveniences occur. For example, if the liquid LQ remaining on the upper plate 65 and the fiducial mark plate FM is vaporized, the liquid LQ may contain a resist on the surface of the substrate P and an eluate of Z or coating strength. Water mark may be formed on upper plate 65 and fiducial mark plate FM.
- the upper plate 65 and the fiducial mark plate FM may be thermally deformed due to the heat of vaporization caused by the vaporization of the liquid LQ.
- the liquid immersion area LR2 is formed by the second immersion mechanism 2 on the upper plate 65 and the reference mark plate FM on the measurement stage ST2.
- Plate 65, fiducial mark plate FM can be wet with liquid LQ without impurities. Therefore, it is possible to suppress the occurrence of inconveniences such as the formation of a water mark on the upper plate 65 and the reference mark plate FM and the thermal deformation of the upper plate 65 and the reference mark plate FM.
- the control device CONT uses the stage driving devices SD1 and SD2 to move at least one of the substrate stage ST1 and the measurement stage ST2, and the substrate stage The upper surface 57 of ST1 and the upper surface 59 of measurement stage ST2 are brought into contact (or approached). Then, conversely, the control device CONT moves both stages ST1 and ST2 together in the + X direction while maintaining the relative positional relationship between the substrate stage ST1 and the measurement stage ST2 in the X-axis direction. Then, after the measurement stage ST2 is moved below the projection optical system PL, the substrate stage ST1 is moved to a predetermined position such as the substrate exchange position RP.
- the liquid immersion area LR1 formed by the first liquid immersion mechanism 1 is arranged on the upper surface 59 of the measurement stage ST2.
- the second immersion mechanism 2 stops supplying the liquid LQ after supplying a predetermined amount of the liquid LQ from the supply port 32, so that the measurement stage ST 2 also applies the lower force of the second nozzle member 72 to the projection optical system. Even if it moves under the PL, the second nozzle member 72 liquid LQ will not scatter or leak to the peripheral device / member.
- the liquid LQ in the immersion region LR2 formed on the measurement stage ST2 by the second immersion mechanism 2 is formed on the image plane side of the projection optical system PL by the first immersion mechanism 1, and The immersion area LR1 that has moved from the upper surface 57 It is recovered through the recovery port 22 of the steel member 70. Note that the measurement stage ST2 and the substrate stage ST1 may be contacted (or approached) during the exposure process. Further, when the movement of the liquid immersion region LR1 to the substrate stage ST1 force measurement stage ST2 is completed, the substrate stage ST1 is separated from the measurement stage ST2 and moved to the substrate exchange position RP or the like.
- the measurement stage ST2 is arranged at a position facing the final optical element LSI, so that the final stage
- the optical path space K1 on the light exit side of the optical element LSI can continue to be filled with liquid LQ. Therefore, since the final optical element LSI can always be wet, a watermark is formed on the final optical element LSI, or the final optical element LSI is thermally deformed due to the heat of vaporization when the liquid LQ is vaporized. Inconvenience such as can be prevented.
- the immersion area LR2 is placed on the upper plate 65 and the reference mark plate FM arranged on the measurement stage ST2, using the second immersion mechanism 2. Therefore, the upper plate 65 and the reference mark plate FM are thermally deformed due to the formation of a watermark on the upper plate 65 and the reference mark plate FM or the heat of vaporization when the liquid LQ is vaporized. Inconveniences such as these can be prevented. Accordingly, it is possible to prevent the measurement performance of the measurement apparatus using the upper plate 65 and the reference mark plate FM from being deteriorated, and to expose the substrate P satisfactorily based on a good measurement result.
- the measurement stage ST2 moves the liquid LQ supplied from the supply port 32 of the second nozzle member 72 below the projection optical system PL
- the first liquid LQ is supplied. 1 Force to be recovered at the recovery port 22 of the nozzle member 70 Before the measurement stage ST2 moves away from the lower side of the second nozzle member 72, connect the second nozzle member 72 to the vacuum system (exhaust system). A negative pressure may be applied to the internal flow path of the second nozzle member 72 to recover the liquid LQ on the upper plate 65 and Z or the reference mark plate FM of the aerial image measurement sensor 60.
- the liquid LQ on the top plate 65 and Z or reference mark plate FM of the aerial image measurement sensor 60 is moved (accelerated, decelerated) on the measurement stage ST2 to other members and devices on the measurement stage ST2. Can be prevented.
- the liquid on the top plate 65 of the aerial image measurement sensor 60 or the reference mark plate FM Even when the LQ moves greatly on the measurement stage ST2 and the measurement stage ST2 moves below the projection optical system PL, it mixes with the liquid LQ that forms the immersion area LR1 formed by the first immersion mechanism 1. In addition, the generation of watermark and Z or heat of vaporization caused by drying there can be prevented.
- the reference mark plate FM has a plurality of reference marks MF1 and FM2 as measurement patterns.
- the second immersion mechanism 2 of the present embodiment has a plurality of supply ports 32 corresponding to the plurality of reference marks FM1 and FM2 when the measurement stage ST2 moves to the retracted position PJ. Yes.
- a plurality of second nozzle members 72 72A, 72B are provided in accordance with the reference marks FM1, FM2, and a supply port 32 is provided for each of the second nozzle members 72A, 72B. ing. Further, the supply port 32 of the second nozzle member 72A and the second reference mark FM2 are opposed to each other, and the supply port 32 of the second nozzle member 72B and the first reference mark FM1 are opposed to each other.
- the second immersion mechanism 2 forms an immersion area LR2 so as to cover the second fiducial mark FM2 by the liquid LQ supplied from the supply port 32 of the second nozzle member 72A, and supplies the second nozzle member 72B.
- the liquid immersion area LR2 is formed so as to cover the first fiducial mark FM1 by the liquid LQ supplied from the port 32.
- the supply port 32 for forming the liquid immersion region LR2 can be provided so as to correspond to a plurality of measurement patterns provided on the measurement member.
- the second fiducial mark FM2 is detected by the alignment system ALG during the baseline measurement of the alignment system ALG.
- 2Reference mark Form the immersion area LR2 on FM2.
- a plurality (two) of mask alignment RAs are provided, and at the time of baseline measurement, a plurality of mask alignment RAs are different from each other on the reference mark plate FM via the liquid LQ. Since the fiducial marks (FM1, FM2) are detected, the immersion area LR2 is also formed on the second fiducial mark FM2.
- fiducial mark plate F M is also provided with a reference mark detected by the alignment ALG.
- a plurality of slit portions (light transmission patterns) 61 serving as measurement patterns are provided on the upper plate 65 of the aerial image measurement sensor 60, the plurality of light transmission patterns are to be supported.
- a plurality of supply ports 32 can be provided.
- the second nozzle member 72 is connected to the vacuum system (exhaust system) before the measurement stage ST2 releases the lower force of the second nozzle member 72, and the space
- the liquid LQ on the upper plate 65 and Z or fiducial mark plate FM of the image measuring sensor 60 may be collected.
- the predetermined position PJ is the projection light so that the substrate stage ST1 holding the substrate P and the measurement stage ST2 do not contact during the exposure operation of the substrate P.
- the positional relationship with the academic system PL (projection area AR) is set.
- the second nozzle member 72 is fixed at the retracted position PJ.
- a drive mechanism is attached to the second nozzle member 72, and the second nozzle member 72 is attached. May be provided to be movable. Then, when the measurement stage ST2 is arranged at a predetermined position away from the projection optical system PL, the control device CONT moves the second nozzle member 72, and the measurement member on the measurement stage ST2 and the second nozzle member Let 72 supply ports 32 face each other.
- the second liquid immersion mechanism 2 holds the liquid LQ between the tip of the second nozzle member 72 and the measurement member, thereby
- the liquid immersion region LR2 is formed in the liquid crystal, and for example, a predetermined amount of liquid LQ droplets are supplied (dropped) onto the measurement member from the supply port 32 of the second nozzle member 72, and then the second Move at least one of the nozzle member 72 and the measurement stage ST2 to separate the second nozzle member 72 and the measurement stage ST2. Since the liquid LQ droplet dropped on the measurement member spreads on the measurement member, the liquid LQ immersion region LR2 can be maintained so as to cover at least a part of the measurement member.
- the measurement stage ST2 is retracted.
- the force that sets the avoidance position and the formation position of the immersion area LR2 by the second immersion mechanism 2 to the same position (predetermined position PJ) may be different.
- the liquid immersion area L is placed on the plurality of measurement members while moving at least one of the second nozzle member 72 and the measurement stage ST2.
- R2 may be formed sequentially.
- the number of the second nozzle members 72 (supply ports 32) need not be the same as the number of measurement members that should form the liquid immersion region LR2, for example, the number of measurement members may be fewer or one. .
- the second immersion mechanism 2 stops supplying the liquid LQ after supplying a predetermined amount of the liquid LQ from the supply port 32 onto the measurement member. And Therefore, after the supply operation of the liquid LQ is stopped, that is, after the supply of the liquid LQ from the liquid supply device 31 to the supply port 32 is stopped, the liquid LQ is provided inside the supply pipe 33 and Z or the second nozzle member 72. There is a possibility that the liquid LQ stays in the supply channel. If the liquid LQ stays in the supply flow path of the supply pipe 33 and Z or the second nozzle member 72 for a long time, the liquid LQ may be contaminated, and the contaminated liquid LQ will remain on the measurement member. May cause inconvenience of contaminating the measuring member.
- a gas supply device 38 is connected to a part of the supply pipe 33 via a pipe (flow path) 38A, and gas is supplied from the gas supply apparatus 38 to the supply pipe 33.
- the liquid LQ remaining in the supply flow path 34 formed inside the supply pipe 33 and Z or the second nozzle member 72 can be discharged to the outside.
- the substrate stage ST1 When the substrate stage ST1 is disposed at a position facing the projection optical system PL, the force with which the liquid immersion area LR2 is formed on the measurement member with the second nozzle member 72 and the measurement stage ST2 facing each other.
- the substrate stage ST1 moves away from the projection optical system PL, for example, to replace the substrate P, and the measurement stage ST2 moves to a position facing the projection optical system PL.
- the control device CONT supplies gas to the supply pipe 33 from the gas supply device 38. Can do.
- the liquid LQ remaining in the supply pipe 33 and Z or the supply flow path 34 is discharged to the outside from the supply port 32.
- the liquid LQ is discharged (discharged) onto the base member BP. Since the amount of the liquid LQ discharged from the supply port 32 is small, the influence on the base member BP and the peripheral device-member is small.
- the gas supplied to the supply pipe 33 and the supply flow path 34, it is possible to prevent the state where the liquid LQ remains in the supply pipe 33 and Z or the supply flow path 34 for a long time. it can.
- a part of the supply pipe 33 is provided with a pipe (flow path) 39A.
- the liquid recovery device 39 includes a vacuum system such as a vacuum pump, and the supply flow path formed in the supply pipe 33 and the Z or second nozzle member 72 by the suction operation of the liquid recovery device 39. Liquid LQ remaining in 34 can be sucked and collected. Thus, even when the liquid recovery device 39 including a vacuum system is connected to the supply pipe 33 and the supply flow path 34, the liquid LQ remains in the supply pipe 33 and Z or the supply flow path 34 for a long time. Can be prevented.
- a recovery port may be provided in the second nozzle member 72 as in the case of the first nozzle member 70. Then, like the first nozzle member 70, the operation of supplying the liquid LQ onto the measurement member via the supply port 32 provided in the second nozzle member 72, and the recovery port provided in the second nozzle member 72
- the liquid LQ immersion region LR2 can be formed on the measurement member by performing the operation of collecting the liquid LQ on the measurement member in parallel.
- the second nozzle member 72 and the measurement stage ST2 are separated from each other, the supply of the liquid LQ from the supply port 32 is stopped, and the liquid LQ on the measurement member is discharged via the recovery port provided in the second nozzle member 72. It can be recovered.
- the second immersion mechanism 2 using the second immersion mechanism 2, at least a part of the upper plate 65 of the aerial image measurement sensor 60 and at least a part of the reference mark plate FM are used.
- the liquid LQ immersion area LR2 is formed in the measurement stage ST2, but the measurement stage ST2 is moved to the retracted position PJ.
- the liquid immersion area LR2 may be formed in the light transmission part of the unevenness sensor and the light transmission part of Z or the irradiation amount sensor. That is, the number and arrangement of the second nozzle members 72 of the second immersion mechanism 2 can be determined so as to face the members that affect the measurement accuracy and the like due to the formation of watermarks and the like.
- the measurement stage ST2 is arranged to face the projection optical system PL (that is, the liquid immersion region LR1 is measured by the first liquid immersion mechanism 1).
- the liquid immersion area LR2 does not need to be formed on the measurement member that is not used during the period (which is formed on the stage ST2) and does not come into contact with the liquid LQ in the liquid immersion area LR1.
- the liquid immersion region LR2 may be formed only on the measurement member that is in contact with (wet) the liquid LQ of the liquid immersion region LR1 regardless of whether or not it is used.
- FIG. 14A is a side sectional view of the measurement stage ST2 according to this embodiment
- FIG. 14B is a plan view seen from above.
- the illustration of the unevenness sensor and the irradiation amount sensor is omitted for the sake of simplicity.
- the configuration of the second immersion mechanism 2 is different from that of the first and second embodiments described above, so only the second immersion mechanism 2 will be described below and the first and second embodiments described above. Constituent parts that are the same as or equivalent to those in FIG.
- the second immersion mechanism 2 has a supply port 32 for supplying the liquid LQ to the upper surface 59 on the upper surface 59 of the measurement stage ST2.
- the supply port 32 is connected to the liquid supply device 31 via an internal flow path 33A formed inside the measurement stage ST2 and a pipe member 33B.
- the pipe member 33B is constituted by a flexible member (flexible tube) constituted by rubber, plastic, or a bellows-like hose.
- Supply port 32 is provided at a position other than upper plate 65 and reference mark plate FM on upper surface 59 of measurement stage ST2.
- one supply port 32 is provided at a predetermined position on the upper surface 59 of the measurement stage ST2.
- the number of supply ports 32 and Z or formation position The position can be changed as appropriate.
- the second immersion mechanism 2 has a liquid recovery groove (concave portion) 44 disposed on the upper surface 59 of the measurement stage ST2 so as to surround the upper plate 65, the reference mark plate FM, and the supply port 32. And then. Inside the recovery groove 44, a liquid recovery port 42 connected to the liquid recovery device 41 is provided.
- the liquid recovery device 41 of the second immersion mechanism 2 includes a vacuum system such as a vacuum pump, a gas-liquid separator that separates the recovered liquid LQ and gas, and a tank that stores the recovered liquid LQ. Yes.
- the liquid recovery operation of the liquid recovery device 41 is controlled by the control device CONT.
- the vacuum system, gas-liquid separator, tank, and the like of the liquid recovery apparatus 41 may be replaced with equipment in a factory or the like in which the exposure apparatus EX is not necessarily provided with the exposure apparatus EX.
- the recovery port 42 is connected to the liquid recovery apparatus 41 via an internal flow path 43A formed inside the measurement stage ST2 and a pipe member 43B. Similar to the pipe member 33B, at least a part of the pipe member 43B is constituted by a flexible member (flexible tube).
- one recovery port 42 is provided at a predetermined position inside the recovery groove 44. Note that the number, Z, or formation position of the recovery ports 42 can be changed as appropriate.
- the control device CONT supplies the liquid LQ from the supply port 32 in order to form the liquid LQ immersion region LR2 in a predetermined region on the measurement stage ST2 including the upper plate 65 and the reference mark plate FM.
- the controller CONT supplies a predetermined amount of liquid LQ from the liquid supply device 31 of the second immersion mechanism 2 and collects a predetermined amount of liquid LQ using the liquid recovery device 41 of the second immersion mechanism 2.
- the liquid LQ film can be formed so as to cover the upper plate 65 and the reference mark plate FM, and the liquid LQ immersion region LR2 can be formed inside the collection groove 44.
- the control device CONT drives each of the liquid supply device 31 and the liquid recovery device 41 of the second liquid immersion mechanism 2.
- the liquid LQ sent from the liquid supply device 31 is measured after flowing through the pipe member 33B and the internal flow path 33A. It is supplied to the upper surface 59 of the measurement stage ST2 through the supply port 32 provided on the upper surface 59 of the stage ST2.
- the liquid LQ supplied from the supply port 32 wets and spreads on the upper surface 59 of the measurement stage ST2, and the upper plate 65, the reference marker A liquid LQ immersion area LR2 is formed to cover the board FM.
- the liquid LQ in the liquid immersion region LR2 formed on the upper surface 59 flows into the recovery groove 44.
- the liquid LQ that has flowed into the recovery groove 44 flows into the internal flow path 43A via the recovery port 42, flows through the tube member 43B, and is recovered by the liquid recovery device 41.
- the inside of the collection groove 44 is covered with the liquid LQ film on the upper surface 59 of the measurement stage ST2 including the upper plate 65 and the reference mark plate FM, and the liquid is placed inside the collection groove 44.
- LQ immersion area LR2 is formed.
- the control device CONT is disposed at a position where the substrate stage ST1 faces the projection optical system PL, and when the measurement stage ST2 is separated from the projection optical system PL (that is, the immersion region LR1 by the measurement stage ST2). When maintenance (holding) is released), an immersion area LR2 is formed on the upper surface 59 of the measurement stage ST2 including the upper plate 65 and the reference mark plate FM. In addition, when performing measurement operations using the upper plate 65 and the reference mark plate FM with the measurement stage ST2 and the projection optical system PL facing each other, the controller CONT also uses the second immersion mechanism 2 The immersion region LR2 can be formed on the measurement stage ST2.
- the second immersion mechanism 2 forms the immersion region LR2 over almost the entire upper surface 59 of the measurement stage ST2, but the liquid immersion region LR2 is formed only in a part of the region.
- the supply port and the collection groove may be arranged so that the immersion region L R2 is formed.
- a recovery groove may be provided so as to surround at least a part of the upper plate 65 of the aerial image measurement sensor 60 and the Z or reference mark plate FM, and a supply port may be provided therein.
- the measurement stage ST2 when the measurement stage ST2 is moved to a position facing the final optical element LSI of the projection optical system PL, the substrate stage ST1 and the measurement stage ST2 are brought into contact (or approached). In this state, the liquid immersion area LR 1 formed by the first liquid immersion mechanism 1 can be moved from the substrate stage ST1 to the measurement stage ST2. At this time, the liquid LQ supplied onto the measurement stage ST2 by the second immersion mechanism 2 forms an immersion area LR1 formed by the first immersion mechanism 1, and is mixed with the liquid LQ, which is 1 Nozzle Collected from collection port 22 of member 70.
- FIG. 15A shows the book
- FIG. 15B is a side sectional view of the measurement stage ST2 according to the embodiment, and is a plan view seen from above.
- the illustration of the unevenness sensor and the irradiation amount sensor is omitted for the sake of simplicity.
- the configuration of the second immersion mechanism 2 is different from that of the first and second embodiments described above, so only the second immersion mechanism 2 will be described below and the first and second embodiments described above. Constituent parts that are the same as or equivalent to those in FIG.
- the second immersion mechanism 2 has a recess 46 having a predetermined depth D that can hold a predetermined amount of liquid LQ on the upper surface 59 of the measurement stage ST2.
- the upper plate 65 and the reference mark plate FM are disposed inside the recess 46.
- the depth D of the recess 46 is set to 1 mm or less. In the present embodiment, the depth D of the recess 46 is set to about 10 m.
- a supply port 32 for supplying the liquid LQ to the upper surface 59 is disposed inside the recess 46 in the upper surface 59 of the measurement stage ST2.
- the supply port 32 is connected to the liquid supply device 31 via an internal flow path 33A formed inside the measurement stage ST2 and a pipe member 33B.
- the supply port 32 is provided at a position other than the upper plate 65 and the reference mark plate FM on the upper surface 59 of the measurement stage ST2.
- one supply port 32 is provided at a predetermined position on the upper surface 59 of the measurement stage ST2. Note that the number, Z, or formation position of the supply ports 32 can be changed as appropriate.
- a recovery port 42 for recovering the liquid LQ on the upper surface 59 is disposed inside the recess 46 in the upper surface 59 of the measurement stage ST2.
- the recovery port 42 is connected to the liquid recovery device 41 via an internal flow path 43A formed inside the measurement stage ST2 and a pipe member 43B.
- the recovery port 42 is provided at a position other than the upper plate 65 and the reference mark plate FM on the upper surface 59 of the measurement stage ST2.
- one recovery port 42 is provided at a predetermined position on the upper surface 59 of the measurement stage ST2. Note that the number, Z, or formation position of the recovery ports 42 can be changed as appropriate.
- the control device CONT uses the liquid 32 from the supply port 32 to fill the inside of the recess 46 on the measurement stage ST2 including the upper plate 65 and the reference mark plate FM with the liquid LQ to form the immersion region LR2.
- Supply LQ The control device CONT receives liquid from the liquid supply device 31 of the second immersion mechanism 2. While supplying a predetermined amount of LQ and recovering a predetermined amount of liquid LQ using the liquid recovery device 41 of the second immersion mechanism 2, the inside of the recess 46 is filled with the liquid LQ, and the upper plate 65, fiducial mark plate FM
- the liquid LQ immersion region LR2 can be formed to cover the surface.
- the liquid LQ delivered from the liquid supply device 31 flows through the pipe member 33B and the internal flow path 33A, It is supplied to the upper surface 59 of the measurement stage ST2 via the supply port 32 provided on the upper surface 59 of the measurement stage ST2.
- the liquid LQ supplied from the supply port 32 wets and spreads on the upper surface 59 of the measurement stage ST2, and forms an immersion area LR2 of the liquid LQ so as to cover the upper plate 65 and the reference mark plate FM.
- the liquid LQ in the liquid immersion region LR2 formed on the upper surface 59 flows into the internal flow path 43A via the recovery port 42, flows through the pipe member 43B, and is recovered by the liquid recovery device 41.
- the control device CONT is disposed at a position where the substrate stage ST1 faces the projection optical system PL, and when the measurement stage ST2 is separated from the projection optical system PL (that is, in the immersion region LR1 by the measurement stage ST2).
- the inside of the recess 46 is filled with the liquid LQ, and the liquid immersion area LR2 is formed so as to cover the upper plate 65 and the reference mark plate FM.
- the control device CONT also sets the second immersion mechanism 2. It is possible to fill the inside of the recess 46 with the liquid LQ and form the immersion area LR2 on the measurement stage ST2.
- the substrate stage ST1 and the measurement stage ST2 are brought into contact ( Alternatively, the immersion area LR 1 formed by the first immersion mechanism 1 can be moved from the substrate stage ST1 to the measurement stage ST2.
- the liquid LQ supplied onto the measurement stage ST2 by the second immersion mechanism 2 forms an immersion area LR1 formed by the first immersion mechanism 1, and is mixed with the liquid LQ, which is 1 Nozzle Collected from collection port 22 of member 70.
- the supply port 32 is arranged inside the recess 46, and the liquid supply operation through the supply port 32 and the liquid recovery operation through the recovery port 42 are performed in parallel. Therefore, the power supply port 32 and Z or the recovery port 42 may be omitted. That is, the projection optical system PL and the meter When the measurement stage ST2 is opposed, a part of the liquid LQ supplied from the first nozzle member 70 is held inside the recess 46, so that a watermark is formed on the measurement member. Inconveniences such as thermal deformation of the measurement member due to the heat of vaporization when the liquid LQ vaporizes can be suppressed.
- the force provided with the supply port 32 for supplying the liquid LQ to the upper surface 59 of the measurement stage ST2 is provided with the supply port 32 on the upper surface 59 of the measurement stage ST2. Without providing, the liquid LQ is supplied to the upper surface 59 of the measurement stage ST2 from the supply port 32 force of the second nozzle member 72 facing the upper surface 59 of the measurement stage ST2, as in the first and second embodiments. You can do it.
- measurement is performed using a measurement member (measurement device) mounted on measurement stage ST2 in a state where projection optical system PL and measurement stage ST2 face each other.
- a focus leveling detection system for detecting the position of the upper surface of the measurement stage ST2 (for example, the upper plate 65 of the aerial image measurement sensor 60) may be provided.
- the position of the upper surface of the measurement stage ST2 may be optically detected via the liquid LQ that forms the liquid immersion region LR1 formed by the first liquid immersion mechanism 1.
- the measurement member (measurement device) mounted on the measurement stage ST2 is not limited to the above, and the number, Z, or type thereof may be arbitrarily determined.
- Various measuring members (measuring devices) may be mounted as necessary.
- the reflecting part disclosed in 62-183522 (corresponding US Pat. No. 4,780,747) may be mounted on the measurement stage ST2.
- a measurement member (measurement device) may be mounted on the substrate stage ST1.
- the liquid immersion region LR2 may be formed on the measurement member that comes into contact with the liquid LQ in the liquid immersion region LR1 on the substrate stage ST1 in the same manner as in the above embodiments.
- two second immersion mechanisms 2 may be provided for the substrate stage ST1 and the measurement stage ST2, respectively.
- the measurement stage ST2 is arranged facing the projection optical system PL (that is, the liquid immersion region LR1 is measured by the first liquid immersion mechanism 1 in the measurement stage ST2.
- the liquid immersion region LR1 is measured by the first liquid immersion mechanism 1 in the measurement stage ST2.
- the liquid immersion region LR2 may be formed only on the measurement member that comes into contact with the liquid LQ in the liquid immersion region LR1 on the measurement stage ST2 and gets wet.
- pure water is used as the liquid LQ.
- Pure water has the advantage that it can be easily obtained in large quantities at semiconductor manufacturing factories and the like, and has no adverse effect on the photoresist on the substrate P and optical elements (lenses).
- pure water has no adverse effects on the environment and the content of impurities is extremely low, so it is expected to clean the surface of the substrate P and the surface of the optical element provided on the front end surface of the projection optical system PL. it can.
- the exposure apparatus may have an ultrapure water maker.
- the refractive index n of pure water (water) for exposure light EL with a wavelength of about 193 nm is said to be approximately 1. 44, and ArF excimer laser light (wavelength 193 nm) is used as the light source of exposure light EL.
- lZn that is, the wavelength is shortened to about 134 nm to obtain a high resolution.
- the projection optical system PL can be used if it is sufficient to ensure the same depth of focus as in the air.
- the numerical aperture can be increased further, and the resolution is improved in this respect as well.
- the optical element LSI is attached to the tip of the projection optical system PL, and the optical characteristics of the projection optical system PL, for example, aberration (spherical aberration, coma aberration, etc.) are adjusted by this lens. It can be carried out.
- the optical element attached to the tip of the projection optical system PL may be an optical plate used for adjusting the optical characteristics of the projection optical system PL. Or it may be a plane parallel plate (such as a cover plate) that can transmit the exposure light EL.
- the structure of the liquid immersion mechanism 1 such as the first nozzle member 70 is not limited to the above-described structure.
- European Patent Publication No. 142 0298, International Publication No. 2004Z055803, International Publication No. 2004/057590 And those described in International Publication No. WO 2005Z029559 can also be used.
- the space between the projection optical system PL and the surface of the substrate P is filled with the liquid LQ.
- the liquid LQ For example, in a state where a cover glass having parallel plane plate force is attached to the surface of the substrate P. May fill liquid LQ.
- the optical path space on the image plane side of the optical element at the tip is filled with liquid, but as disclosed in International Publication No. 2004Z019128, It is also possible to employ a projection optical system in which the optical path space on the object plane side (mask side) of the optical element is filled with liquid.
- the liquid LQ in each of the above embodiments is water (pure water), but may be a liquid other than water.
- the light source of the exposure light EL is an F laser
- the F laser Light penetrates water
- PFPE PFPE
- fluorinated fluid such as fluorinated oil
- a lyophilic treatment is performed by forming a thin film with a substance having a small molecular structure including fluorine, for example, in a portion in contact with the liquid LQ.
- the liquid LQ may be stable to the projection optical system PL that is transparent to the exposure light EU and has a refractive index as high as possible, and a photoresist applied to the surface of the substrate P (for example, It is also possible to use cedar oil.
- various liquids such as a supercritical fluid can be used.
- the same liquid LQ is used in the first liquid immersion mechanism 1 and the second liquid immersion mechanism 2, but the same liquid may not necessarily be used. Different liquids may be used. Further, in each of the above embodiments, it is preferable that the second immersion mechanism 2 supplies the liquid LQ having substantially the same temperature as the temperature of the measurement member that forms the immersion region LR2. As a result, thermal deformation of the measuring member due to a temperature difference from the liquid LQ can be prevented. Furthermore, it is preferable that the first immersion mechanism 1 supplies the liquid LQ having substantially the same temperature as the temperature of the substrate P to form the immersion region LR1. This can prevent thermal deformation of the substrate P due to a temperature difference from the liquid LQ.
- a mask stage is used by using the interferometer system (52, 54, 56).
- the position information of the MST, the substrate stage ST1, and the measurement stage ST2 is measured.
- the present invention is not limited to this.
- an encoder system that detects a scale (diffraction grating) provided in each stage may be used.
- the hybrid system includes both the interferometer system and the encoder system, and the measurement result of the encoder system is calibrated using the measurement result of the interferometer system.
- the interferometer system and the encoder system may be switched and used, or both of them may be used to control the position of the stage.
- the liquid LQ may have a refractive index of about 1.6 to 1.8.
- the refractive index is higher than that of quartz or fluorite! (For example, 1.6 or more).
- the substrate P in each of the above embodiments is used not only for semiconductor wafers for manufacturing semiconductor devices, but also for glass substrates for display devices, ceramic wafers for thin film magnetic heads, or exposure apparatuses. Mask or reticle master (synthetic quartz, silicon wafer), etc. are applied.
- an exposure apparatus EX in addition to a step-and-scan type scanning exposure apparatus (scanning stepper) that performs mask exposure by scanning the mask M and the substrate P in synchronization with each other, a mask is used.
- the present invention can also be applied to a step-and-repeat projection exposure apparatus (steno) in which the pattern of the mask M is collectively exposed while M and the substrate P are stationary, and the substrate P is sequentially moved stepwise.
- the exposure apparatus ⁇ has one or more substrate stages ST1
- the liquid immersion area LR2 is formed on a measurement member that includes the measurement stage ST2 and is wetted in contact with the liquid LQ of the liquid immersion area LR1 on at least the measurement stage ST2, but is not limited to this.
- the immersion region LR2 may be formed on the measurement member that comes into contact with the liquid LQ in the immersion region LR1 and gets wet, as in the above embodiments.
- the movable member that has the measurement member and maintains (holds) the liquid immersion region LR1 instead of the substrate stage ST1 is a stage (ST2) capable of two-dimensional movement.
- the present invention is not limited to this, and for example, only one-dimensional movement may be possible, or a member that can be slid or rotated instead of the stage may be used.
- the exposure apparatus EX is provided with the measurement stage ST2 as a movable member having a measurement member.
- the force is not necessarily provided with the measurement stage ST2, for example, at least one has the measurement member.
- the present invention can also be applied to an exposure apparatus including only a plurality of substrate stages.
- the liquid immersion region LR2 should be formed on the measurement member that comes into contact with the liquid LQ in the liquid immersion region LR1 on the substrate stage ST1 as in the above embodiments.
- a plurality of measurement members (such as the reference mark plate FM and the aerial image measurement sensor 60) are provided on the movable member (such as the measurement stage and the substrate stage).
- the type is not limited to this, and may be arbitrary.
- the number of reference marks formed on the reference mark plate FM is not limited to a plurality, and may be one, or at least one reference mark may be formed on each of the plurality of reference mark plates. Further, the reference mark may be formed directly on the movable member instead of the reference mark plate.
- a reduced image of the first pattern is projected with the first pattern and the substrate P substantially stationary (for example, a refraction type including a reflective element at a 1Z8 reduction magnification). It can also be applied to an exposure apparatus that uses a projection optical system) to perform batch exposure on the substrate P. In this case, after that, with the second pattern and the substrate P almost stationary, a reduced image of the second pattern is collectively exposed on the substrate P by partially overlapping the first pattern using the projection optical system. It can also be applied to a stitch type batch exposure apparatus. In addition, as a stitch type exposure apparatus, at least two patterns are partially overlapped on the substrate P and transferred. It can also be applied to a step 'and' stitch type exposure apparatus in which the plate P is moved sequentially.
- the exposure apparatus provided with the projection optical system PL has been described as an example.
- an exposure apparatus and an exposure method that do not use the projection optical system PL are applied to the present invention. Can do.
- the projection optical system PL is not used as described above, the exposure light is irradiated onto the substrate through an optical member such as a mask or a lens, and the liquid is applied to a predetermined space between the optical member and the substrate. An immersion area is formed.
- the type of exposure apparatus EX is not limited to an exposure apparatus for manufacturing a semiconductor element that exposes a semiconductor element pattern onto a substrate P, but an exposure apparatus for manufacturing a liquid crystal display element or a display, a thin film magnetic head, an imaging It can be widely applied to exposure devices for manufacturing devices (CCD), micromachines, MEMS, DNA chips, reticles or masks.
- force using a light-transmitting mask in which a predetermined light-shielding pattern (or phase pattern 'dimming pattern) is formed on a light-transmitting substrate is used instead of this mask.
- a predetermined light-shielding pattern or phase pattern 'dimming pattern
- an electronic mask (variable molding mask) that forms a transmission pattern, a reflection pattern, or a light emission pattern based on electronic data of a pattern to be exposed.
- a DMD Digital Micro-mirror Device
- spatial light modulator spatial light modulator
- an exposure apparatus (lithography system) that exposes a line 'and' space pattern on the substrate P by forming interference fringes on the substrate P. )
- a line 'and' space pattern on the substrate P by forming interference fringes on the substrate P.
- two mask patterns are synthesized on the substrate via the projection optical system.
- the present invention can also be applied to an exposure apparatus that performs double exposure of one shot area on the substrate almost simultaneously by one scan exposure.
- the exposure apparatus EX can provide various subsystems including the constituent elements recited in the claims of the present application with predetermined mechanical accuracy, electrical accuracy, and optical accuracy. Manufactured by assembling to keep. In order to ensure these various accuracies, before and after the assembly, various optical systems are adjusted to achieve optical accuracy, various mechanical systems are adjusted to achieve mechanical accuracy, various electrical systems Is adjusted to achieve electrical accuracy.
- the assembly process from various subsystems to the exposure system includes mechanical connections, electrical circuit wiring connections, and pneumatic circuit piping connections between the various subsystems. Needless to say, there is an assembly process for each subsystem before the assembly process from the various subsystems to the exposure apparatus. When the assembly process of the various subsystems to the exposure apparatus is completed, comprehensive adjustment is performed to ensure various accuracies for the entire exposure apparatus. It is desirable to manufacture the exposure apparatus in a clean room in which the temperature and cleanliness are controlled.
- a microdevice such as a semiconductor device includes a step 201 for designing a function / performance of the microdevice, a step 202 for producing a mask (reticle) based on the design step, Step 203 for manufacturing a substrate as a base material, Step 204 including processing for exposing the mask pattern onto the substrate by the exposure apparatus EX of the above-described embodiment, Device assembly step (including dicing process, bonding process, and packaging process) It is manufactured through 205, inspection step 206 and the like.
- the present invention it is possible to prevent generation of a watermark in the measurement member and to suppress thermal deformation of the measurement member. Thereby, it is possible to prevent a decrease in accuracy (deterioration of apparatus performance) in measurement using the measurement member and to expose the substrate with high accuracy. Therefore, the present invention provides an exposure apparatus and exposure method for manufacturing a wide range of products such as semiconductor elements, liquid crystal display elements or displays, thin film magnetic heads, CCDs, micromachines, MEMS, DNA chips, and reticles (masks). Very useful.
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Abstract
Description
Claims
Priority Applications (3)
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US11/887,182 US20090226846A1 (en) | 2005-03-30 | 2006-03-30 | Exposure Apparatus, Exposure Method, and Device Manufacturing Method |
EP06730625A EP1865540A4 (en) | 2005-03-30 | 2006-03-30 | EXPOSURE APPARATUS, EXPOSURE METHOD, AND DEVICE PRODUCTION METHOD |
JP2007512861A JP4544303B2 (ja) | 2005-03-30 | 2006-03-30 | 露光装置及び露光方法、並びにデバイス製造方法 |
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EP (1) | EP1865540A4 (ja) |
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JP2010526435A (ja) * | 2007-05-03 | 2010-07-29 | エーエスエムエル ネザーランズ ビー.ブイ. | イメージセンサ、イメージ検出方法、及びコンピュータプログラム |
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US7649611B2 (en) | 2005-12-30 | 2010-01-19 | Asml Netherlands B.V. | Lithographic apparatus and device manufacturing method |
EP2131242A1 (en) * | 2008-06-02 | 2009-12-09 | ASML Netherlands B.V. | Substrate table, lithographic apparatus and device manufacturing method |
US20130169944A1 (en) * | 2011-12-28 | 2013-07-04 | Nikon Corporation | Exposure apparatus, exposure method, device manufacturing method, program, and recording medium |
WO2017006416A1 (ja) * | 2015-07-06 | 2017-01-12 | 富士機械製造株式会社 | 実装装置、撮像処理方法及び撮像ユニット |
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- 2006-03-30 EP EP06730625A patent/EP1865540A4/en not_active Withdrawn
- 2006-03-30 JP JP2007512861A patent/JP4544303B2/ja not_active Expired - Fee Related
- 2006-03-30 KR KR1020077003705A patent/KR20070115860A/ko not_active Application Discontinuation
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US8975599B2 (en) | 2007-05-03 | 2015-03-10 | Asml Netherlands B.V. | Image sensor, lithographic apparatus comprising an image sensor and use of an image sensor in a lithographic apparatus |
US9329500B2 (en) | 2007-05-03 | 2016-05-03 | Asml Netherlands B.V. | Lithographic apparatus configured to reconstruct an aerial pattern and to compare the reconstructed aerial pattern with an aerial pattern detected by an image sensor |
Also Published As
Publication number | Publication date |
---|---|
US20090226846A1 (en) | 2009-09-10 |
KR20070115860A (ko) | 2007-12-06 |
JPWO2006106833A1 (ja) | 2008-09-11 |
JP4544303B2 (ja) | 2010-09-15 |
EP1865540A4 (en) | 2010-03-17 |
EP1865540A1 (en) | 2007-12-12 |
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