WO2009116625A1 - クリーニング工具、クリーニング方法、及びデバイス製造方法 - Google Patents
クリーニング工具、クリーニング方法、及びデバイス製造方法 Download PDFInfo
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- WO2009116625A1 WO2009116625A1 PCT/JP2009/055431 JP2009055431W WO2009116625A1 WO 2009116625 A1 WO2009116625 A1 WO 2009116625A1 JP 2009055431 W JP2009055431 W JP 2009055431W WO 2009116625 A1 WO2009116625 A1 WO 2009116625A1
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- Prior art keywords
- cleaning
- liquid
- substrate
- cleaning tool
- exposure apparatus
- Prior art date
Links
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- 238000000034 method Methods 0.000 title claims description 96
- 238000004519 manufacturing process Methods 0.000 title claims description 18
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67046—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly scrubbing means, e.g. brushes
-
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus
- G03F7/70825—Mounting of individual elements, e.g. mounts, holders or supports
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70908—Hygiene, e.g. preventing apparatus pollution, mitigating effect of pollution or removing pollutants from apparatus
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70908—Hygiene, e.g. preventing apparatus pollution, mitigating effect of pollution or removing pollutants from apparatus
- G03F7/70925—Cleaning, i.e. actively freeing apparatus from pollutants, e.g. using plasma cleaning
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
- H01L21/0274—Photolithographic processes
Definitions
- the present invention relates to a cleaning tool for cleaning a member in an exposure apparatus, a cleaning method, and a device manufacturing method.
- This application claims priority based on Japanese Patent Application No. 2008-072524 filed on March 19, 2008 and Japanese Patent Application No. 2008-216525 filed on August 26, 2008, the contents of which are incorporated herein by reference. Incorporate.
- a cleaning tool that is carried into an exposure apparatus that exposes a substrate with exposure light and that cleans members in the exposure apparatus, and is disposed on the base member and the base member for cleaning.
- a cleaning tool comprising a cleaning member soaked with liquid.
- the cleaning tool of the first aspect is carried into the exposure apparatus that exposes the substrate with exposure light, and the cleaning member of the cleaning tool and the member in the exposure apparatus are brought into contact with each other. Cleaning at least a part of a member in the exposure apparatus.
- the cleaning tool of the first aspect is carried into the exposure apparatus that exposes the substrate with exposure light, and the cleaning member of the cleaning tool and the member in the exposure apparatus are brought into contact with each other.
- a device manufacturing method including cleaning at least a part of members in an exposure apparatus, exposing the substrate with the exposure apparatus after cleaning, and developing the exposed substrate.
- a cleaning tool that is carried into an exposure apparatus that exposes a substrate with exposure light through a first liquid and that cleans a predetermined member in the exposure apparatus.
- a second surface opposite to the first surface a porous plate having a plurality of holes communicating the first surface and the second surface, a base member supporting the porous plate, and an internal space facing the second surface
- a cleaning tool in which the second liquid for cleaning is held in the internal space is carried into an exposure apparatus that exposes a substrate with exposure light through a first liquid and that cleans a predetermined member in the exposure apparatus.
- the cleaning tool of the fourth aspect is carried into an exposure apparatus that exposes the substrate with exposure light through the first liquid, and the first liquid and the first surface are brought into contact with each other. And cleaning a surface of a predetermined member in the exposure apparatus with a mixed liquid of the first liquid and the second liquid generated on the first surface.
- the cleaning tool of the fourth aspect is carried into an exposure apparatus that exposes the substrate with exposure light through the first liquid, and the first liquid and the first surface are brought into contact with each other. And cleaning at least a part of a predetermined member in the exposure apparatus with a mixed liquid of the first liquid and the second liquid generated on the first surface, and exposing the substrate with the exposure apparatus after the cleaning. And developing the exposed substrate.
- a device manufacturing method is provided.
- a cleaning tool that is carried into an exposure apparatus that exposes a substrate with exposure light and that cleans members in the exposure apparatus, the cleaning tool being provided on the base member and the base member.
- a cleaning tool comprising a liquid holding member capable of holding a liquid.
- the cleaning tool according to the seventh aspect is carried into an exposure apparatus that exposes the substrate with exposure light, and the exposure apparatus uses the cleaning liquid held by the liquid holding member of the cleaning tool. Cleaning a surface of a predetermined member therein.
- the cleaning tool according to the seventh aspect is carried into an exposure apparatus that exposes the substrate with exposure light, and the exposure apparatus uses the cleaning liquid held by the liquid holding member of the cleaning tool.
- a device manufacturing method including cleaning a surface of a predetermined member, exposing a substrate with an exposure apparatus after cleaning, and developing the exposed substrate.
- the occurrence of exposure failure can be suppressed. Moreover, according to the aspect of the present invention, the occurrence of defective devices can be suppressed.
- FIG. 3 is a side sectional view showing the vicinity of the liquid immersion member according to the first embodiment.
- FIG. 3 is a side sectional view showing the vicinity of the liquid immersion member according to the first embodiment.
- FIG. 1 It is a figure which shows the state by which the cleaning tool which concerns on 2nd Embodiment was hold
- FIG 3 is a side sectional view showing the vicinity of the liquid immersion member according to the first embodiment. It is a figure which shows the state by which the cleaning tool which concerns on 1st Embodiment was hold
- perforated plate 502A ... front surface, 502B ... back surface, 502H ... hole, 503 ... base member 504 ... Internal space, 505 ... Porous member, 506A ... First convex portion, 506B ... Second convex portion, 507 ... Concavity portion, 512 ... Substrate stage, 512T ... Top surface, 513 ... Measurement step Di, 513T ... top, 514 ... liquid immersion member, 515 ... transportation system, 523 ... bottom surface, 524 ... conveying member, 535 ... porous member
- an XYZ orthogonal coordinate system is set, and the positional relationship of each member will be described with reference to the XYZ orthogonal coordinate system.
- a predetermined direction in the horizontal plane is defined as an X-axis direction
- a direction orthogonal to the X-axis direction in the horizontal plane is defined as a Y-axis direction
- a direction orthogonal to each of the X-axis direction and the Y-axis direction (that is, a vertical direction) is defined as a Z-axis direction.
- the rotation (inclination) directions around the X, Y, and Z axes are the ⁇ X, ⁇ Y, and ⁇ Z directions, respectively.
- FIG. 1 is a perspective view showing an example of a cleaning tool 1 according to the first embodiment
- FIG. 2 is a side sectional view.
- the cleaning tool 1 is carried into the exposure apparatus EX that exposes the substrate P with the exposure light EL, and cleans at least a part of the members in the exposure apparatus EX.
- the cleaning tool 1 includes a base member 2 and a cleaning member 3 disposed on the base member 2 and soaked with the cleaning liquid LC.
- the base member 2 is a plate member and has a front surface 2A and a back surface 2B.
- the outer shape of the base member 2 in the XY plane is substantially circular.
- the outer shape of the base member 2 is substantially the same as the outer shape of the substrate P.
- the base member 2 is made of stainless steel, for example.
- the cleaning member 3 comes into contact with the surface of a member in the exposure apparatus EX to be cleaned, and cleans the surface of the member.
- the cleaning member 3 is impregnated with the cleaning liquid LC.
- the cleaning member 3 is a sponge. Therefore, the cleaning liquid LC can be infiltrated into the cleaning member 3.
- the cleaning liquid LC is supplied to the cleaning member 3 from a cleaning liquid supply source (not shown), and the cleaning liquid LC is held on the cleaning member 3.
- the supply of the cleaning liquid LC from the cleaning liquid supply source (not shown) to the cleaning member 3 may be performed automatically inside the exposure apparatus EX or outside the exposure apparatus EX, or may be performed by an operator.
- the sponge of the cleaning member 3 for example, a sponge made of polyvinyl alcohol (PVA sponge) or a sponge made of urethane (urethane sponge) can be used.
- PVA sponge polyvinyl alcohol
- urethane sponge urethane sponge
- the material of the sponge is not limited to the above as long as it does not generate contaminants such as foreign matters.
- the cleaning liquid LC is a liquid that can clean the members in the exposure apparatus EX.
- the cleaning liquid LC is a liquid that can remove foreign matters (contaminants) adhering to members in the exposure apparatus EX, for example.
- an alkali cleaning liquid containing alkali can be used as the cleaning liquid LC.
- the alkali includes, for example, ammonia.
- an alkaline cleaning liquid as the cleaning liquid LC, it is possible to satisfactorily remove contaminants such as organic substances attached to members in the exposure apparatus EX.
- TMAH aqueous tetramethylammonium hydroxide
- water pure water
- the liquid LC may be isopropyl alcohol (IPA).
- the cleaning member 3 includes a first portion 3A and a second portion 3B.
- the first portion 3 ⁇ / b> A and the second portion 3 ⁇ / b> B are separated on the base member 2.
- the first portion 3A of the cleaning member 3 is appropriately referred to as a first cleaning member 3A
- the second portion 3B is appropriately referred to as a second cleaning member 3B.
- first cleaning member 3A and the second cleaning member 3B are formed of the same material.
- both the first and second cleaning members 3A and 3B are PVA sponges.
- both the first and second cleaning members 3A and 3B may be urethane sponges.
- first cleaning member 3A and the second cleaning member 3B may be formed of different materials.
- one of the first cleaning member 3A and the second cleaning member 3B may be a PVA sponge and the other may be a urethane sponge.
- the porosity may be different between the first cleaning member 3A and the second cleaning member 3B.
- the porosity is the ratio of the pore volume to the geometric (outer shape) volume of a porous member such as a sponge. In other words, the porosity is the content of pores per unit volume.
- the cleaning liquid LC is infiltrated into both the first cleaning member 3A and the second cleaning member 3B. That is, in the present embodiment, the cleaning liquid LC includes the cleaning liquid soaked in the first cleaning member 3A and the cleaning liquid soaked in the second cleaning member 3B.
- the cleaning liquid soaked into the first cleaning member 3A and the cleaning liquid soaked into the second cleaning member 3B are the same type of liquid.
- the cleaning liquid that permeates the first cleaning member 3A and the cleaning liquid that permeates the second cleaning member 3B may be different types of liquid.
- one of the first cleaning member 3A and the second cleaning member 3B may be impregnated with the cleaning liquid, and the other may not be impregnated with the cleaning liquid.
- the second cleaning member 3B is disposed on at least a part of the periphery of the first cleaning member 3A.
- the first cleaning member 3 ⁇ / b> A is disposed substantially at the center of the surface 2 ⁇ / b> A of the base member 2.
- the shape of the first cleaning member 3A in the XY plane parallel to the surface 2A is a rectangle.
- the second cleaning member 3B is disposed at two locations around the first cleaning member 3A. That is, in the present embodiment, two second cleaning members 3B are arranged. The size and shape of the two second cleaning members 3B are substantially the same.
- the second cleaning member 3B is disposed on both sides of the first cleaning member 3A in the XY plane. That is, the second cleaning member 3B is disposed on one side (+ X side) and the other side ( ⁇ X side) of the first cleaning member 3A in the XY plane.
- the size L1 of the upper surface 4A of the first cleaning member 3A in the Y-axis direction and the size L2 of the upper surface 4B of the second cleaning member 3B are substantially the same.
- the size W1 of the upper surface 4A of the first cleaning member 3A in the X-axis direction is different from the size W2 of the upper surface 4B of the second cleaning member 3B.
- the size W1 is larger than the size W2.
- the first cleaning member 3A has a first height H1 with respect to the surface 2A of the base member 2
- the second cleaning member 3B has a second height with respect to the surface 2A of the base member 2.
- H2 The first height H1 is a distance between the surface 2A of the base member 2 and the upper surface 4A of the first cleaning member 3A in the Z-axis direction (the normal direction of the surface 2A of the base member 2).
- the second height H2 is a distance between the surface 2A of the base member 2 and the upper surface 4B of the second cleaning member 3B in the Z-axis direction.
- the first and second heights H1 and H2 are heights in a state where the first and second cleaning members 3A and 3B are not contracted (a state where no external force is applied).
- the upper surfaces 4A and 4B are substantially flat when the first and second cleaning members 3A and 3B are not contracted (the external force is not applied).
- the surface 2A of the base member 2, the upper surface 4A of the first cleaning member 3A, and the upper surface 4B of the second cleaning member 3B are substantially parallel.
- the surface 2A of the base member 2 may not be parallel to at least one of the upper surface 4A of the first cleaning member 3A and the upper surface 4B of the second cleaning member 3B.
- the upper surface 4A of the first cleaning member 3A and the upper surface 4B of the second cleaning member 3B may not be parallel.
- the first height H1 and the second height H2 are determined according to the shape of the surface of the member in the exposure apparatus EX to be cleaned.
- the second height H2 is higher than the first height H1. That is, the second cleaning member 3B is higher than the first cleaning member 3A with respect to the surface 2A of the base member 2.
- the cleaning tool 1 has a peripheral wall member 5 disposed on the base member 2 and disposed around the cleaning member 3.
- the peripheral wall member 5 is disposed on the outer edge of the surface 2 ⁇ / b> A of the base member 2.
- the peripheral wall member 5 is an annular member having a predetermined width W3.
- the peripheral wall member 5 suppresses the leakage of the cleaning liquid LC. That is, the peripheral wall member 5 suppresses the cleaning liquid LC that has been infiltrated into the cleaning member 3 from leaking outside the base member 2. In other words, the outflow of the cleaning liquid LC oozing out from the cleaning member 3 to the outside of the base member 2 is prevented.
- the peripheral wall member 5 collects the cleaning liquid LC that has oozed out from the cleaning member 3.
- the peripheral wall member 5 is a sponge. Therefore, the peripheral wall member 5 can absorb and collect the cleaning liquid LC that has oozed out from the cleaning member 3.
- the cleaning liquid LC is infiltrated into the cleaning member 3 and the peripheral wall member 5 is liquid. Is not soaked. That is, in the initial state of the cleaning tool 1, the peripheral wall member 5 is in a dry state. Therefore, the peripheral wall member 5 can satisfactorily absorb and collect the cleaning liquid LC that has oozed from the cleaning member 3.
- the peripheral wall member 5 may be slightly infiltrated.
- the sponge of the peripheral wall member 5 for example, a sponge made of polyvinyl alcohol (PVA sponge) or a sponge made of urethane (urethane sponge) can be used.
- PVA sponge polyvinyl alcohol
- urethane sponge urethane sponge
- the material of the sponge is not limited to the above as long as it does not generate contaminants such as foreign matters.
- the peripheral wall member 5 has a third height H3 with respect to the surface 2A of the base member 2.
- the third height H3 is a distance between the surface 2A of the base member 2 and the upper surface 4C of the peripheral wall member 5 in the Z-axis direction (the normal direction of the surface 2A of the base member 2).
- the upper surface 4C is substantially flat. Further, the surface 2A of the base member 2 and the upper surface 4C of the peripheral wall member 5 are substantially parallel.
- the third height H3 is lower than the first and second heights H1 and H2. That is, the peripheral wall member 5 is lower than the cleaning member 3 (3A, 3B) with respect to the surface 2A of the base member 2.
- the third height H3 is a height when the peripheral wall member 5 is not contracted (a state where no external force is applied).
- the peripheral wall member 5 is more lyophilic with respect to the cleaning liquid LC than the cleaning member 3. Thereby, the cleaning liquid LC that has oozed out from the cleaning member 3 can be recovered (absorbed) well, and leakage of the cleaning liquid LC can be suppressed. Further, by making the peripheral wall member 5 lyophilic with respect to the cleaning liquid LC, the cleaning liquid LC can be recovered (absorbed) well even if the volume of the peripheral wall member 5 or the third height H3 is reduced. Can do.
- the entire peripheral wall member 5 is made of sponge, but only a part may be made of sponge.
- FIG. 3 is a schematic block diagram that shows an example of the exposure apparatus EX according to the present embodiment.
- the exposure apparatus EX is an immersion exposure apparatus that exposes the substrate P with the exposure light EL via the exposure liquid LQ
- the exposure apparatus EX is an immersion exposure apparatus that exposes the substrate P with the exposure light EL via the exposure liquid LQ.
- an exposure apparatus EX includes a mask stage 11 that can move while holding a mask M, a substrate stage 12 that can move while holding a substrate P, and an illumination system IL that illuminates the mask M with exposure light EL.
- the projection optical system PL that projects an image of the pattern of the mask M illuminated with the exposure light EL onto the substrate P, and the immersion space LS are formed so that at least part of the optical path K of the exposure light EL is filled with the liquid LQ.
- a liquid immersion member 13 that can be transported, a transport system 14 that can transport the substrate P, and a control device 15 that controls the overall operation of the exposure apparatus EX are provided.
- the mask M includes a reticle on which a device pattern projected onto the substrate P is formed.
- the mask M includes a transmission type mask in which a predetermined pattern is formed on a transparent plate such as a glass plate using a light shielding film such as chromium.
- a reflective mask can also be used as the mask M.
- the substrate P is a substrate for manufacturing a device.
- the substrate P includes a base material such as a semiconductor wafer such as a silicon wafer and a photosensitive film formed on the base material.
- the photosensitive film is a film of a photosensitive material (photoresist).
- the substrate P may include a film different from the photosensitive film.
- the substrate P may include an antireflection film or a protective film (topcoat film) that protects the photosensitive film.
- the illumination system IL illuminates a predetermined illumination region IR with exposure light EL having a uniform illuminance distribution.
- the illumination system IL illuminates at least a part of the mask M arranged in the illumination region IR with the exposure light EL having a uniform illuminance distribution.
- the exposure light EL emitted from the illumination system IL for example, far ultraviolet light (DUV light) such as bright lines (g line, h line, i line) and KrF excimer laser light (wavelength 248 nm) emitted from a mercury lamp, ArF Excimer laser light (wavelength 193 nm), vacuum ultraviolet light (VUV light) such as F 2 laser light (wavelength 157 nm), or the like is used.
- ArF excimer laser light which is ultraviolet light (vacuum ultraviolet light) is used as the exposure light EL.
- the mask stage 11 has a mask holding part 11H that holds the mask M in a releasable manner.
- the mask holding unit 11H holds the mask M so that the pattern formation surface (lower surface) of the mask M and the XY plane are substantially parallel.
- the mask stage 11 is movable in the XY plane including the illumination region IR while holding the mask M by the operation of the first drive system 11D including an actuator such as a linear motor.
- the mask stage 11 is movable in three directions of the X axis, the Y axis, and the ⁇ Z direction while holding the mask M by the mask holding unit 11H.
- the position information of the mask stage 11 is measured by the laser interferometer 16A of the interferometer system 16.
- the laser interferometer 16 ⁇ / b> A measures position information using a reflection mirror 11 ⁇ / b> R provided on the mask stage 11.
- the control device 15 operates the first drive system 11D based on the measurement result of the laser interferometer 16A, and controls the position of the mask M held on the mask stage 11.
- Projection optical system PL irradiates exposure light EL to a predetermined projection region PR.
- the projection optical system PL projects an image of the pattern of the mask M at a predetermined projection magnification onto at least a part of the substrate P arranged in the projection region PR.
- the plurality of optical elements of the projection optical system PL are held by the lens barrel 17.
- the projection optical system PL of the present embodiment is a reduction system whose projection magnification is, for example, 1/4, 1/5, or 1/8. Note that the projection optical system PL may be either an equal magnification system or an enlargement system.
- the optical axis AX of the projection optical system PL is parallel to the Z axis.
- 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. Further, the projection optical system PL may form either an inverted image or an erect image.
- the substrate stage 12 has a substrate holding part 12H that holds the substrate P in a releasable manner.
- the substrate holding unit 12H holds the substrate P so that the surface (exposure surface) of the substrate P and the XY plane are substantially parallel.
- the substrate stage 12 is an XY including the projection region PR along the upper surface (guide surface) 18G of the surface plate 18 while holding the substrate P by the operation of the second drive system 12D including an actuator such as a linear motor. It can move in the plane.
- the substrate stage 12 is movable in six directions including the X axis, the Y axis, the Z axis, the ⁇ X, the ⁇ Y, and the ⁇ Z directions while holding the substrate P by the substrate holder 12H.
- the substrate stage 12 has an upper surface 12T disposed around the substrate holding part 12H.
- the substrate holding part 12H is disposed in a recess 12C provided on the substrate stage 12.
- the upper surface 12T of the substrate stage 12 is flat and substantially parallel to the XY plane.
- the surface of the substrate P held by the substrate holding part 12H and the upper surface 12T of the substrate stage 12 are arranged in substantially the same plane (substantially flush).
- the positional information of the substrate stage 12 (substrate P) in the X-axis, Y-axis, and ⁇ Z directions is measured by the laser interferometer 16B of the interferometer system 16.
- the laser interferometer 16 ⁇ / b> B measures position information using a reflection mirror 12 ⁇ / b> R provided on the substrate stage 12. Further, position information (position information regarding the Z axis, ⁇ X, and ⁇ Y directions) of the surface of the substrate P held on the substrate stage 12 is detected by a focus / leveling detection system (not shown).
- the control device 15 operates the second drive system 12D based on the measurement result of the laser interferometer 16B and the detection result of the focus / leveling detection system, and controls the position of the substrate P held on the substrate stage 12.
- the transport system 14 can transport the substrate P.
- the transport system 14 can carry (load) the substrate P before exposure into the substrate holding unit 12H, and can carry out (unload) the substrate P after exposure from the substrate holding unit 12H.
- the control device 15 moves the substrate stage 12 to a substrate exchange position CP different from the irradiation position EP of the exposure light EL emitted from the projection optical system PL when loading the substrate P onto the substrate holding unit 12H. Further, when unloading the substrate P from the substrate holding part 12H, the control device 15 moves the substrate stage 12 to the substrate replacement position CP.
- the substrate stage 12 is movable within a predetermined region of the guide surface 18G including the irradiation position EP of the exposure light EL and the substrate replacement position CP.
- the transport system 14 can execute a loading operation of the substrate P with respect to the substrate holding part 12H of the substrate stage 12 moved to the substrate exchange position CP, and the substrate P is unloaded from the substrate holding part 12H of the substrate stage 12.
- An operation (unloading operation) can be executed.
- the control device 15 uses the transport system 14 to unload the substrate stage 12 (substrate holding unit 12H) moved to the substrate exchange position CP and unload the substrate P after exposure, and then expose to be exposed.
- Substrate replacement processing including a loading operation for loading the previous substrate P onto the substrate stage 12 (substrate holding unit 12H) can be executed.
- the immersion member 13 can form the immersion space LS with the liquid LQ so that at least a part of the optical path K of the exposure light EL is filled with the exposure liquid LQ.
- the immersion space LS is a space filled with the liquid LQ.
- water pure water
- the immersion space LS is such that the optical path K of the exposure light EL emitted from the last optical element 19 closest to the image plane of the projection optical system PL is the liquid LQ among the plurality of optical elements of the projection optical system PL. It is formed to be filled with.
- the last optical element 19 has an exit surface 20 that emits the exposure light EL toward the image plane of the projection optical system PL.
- the immersion space LS is formed such that the optical path K between the terminal optical element 19 and an object disposed at a position facing the exit surface 20 of the terminal optical element 19 is filled with the liquid LQ.
- the position facing the emission surface 20 includes the irradiation position EP of the exposure light EL emitted from the emission surface 20.
- the immersion member 13 is disposed in the vicinity of the last optical element 19.
- the liquid immersion member 13 is configured so that the optical path K of the exposure light EL between the terminal optical element 19 and the object disposed at the irradiation position EP of the exposure light EL emitted from the emission surface 20 is filled with the liquid LQ.
- the immersion space LS can be formed.
- the liquid immersion member 13 is disposed around the optical path K of the exposure light EL emitted from the emission surface 20, and is a lower surface capable of holding the liquid LQ with the surface of the object disposed at the irradiation position EP of the exposure light EL. 21. In the present embodiment, an object that can face the emission surface 20 can face the lower surface 21.
- the last optical element 19 can hold the liquid LQ between the exit surface 20 and the surface of the object.
- the liquid immersion member 13 can hold the liquid LQ between the lower surface 21 and the surface of the object.
- the liquid LQ is held between the exit surface 20 and the lower surface 21 on one side and the surface of the object on the other side, whereby the optical path of the exposure light EL between the exit surface 20 of the last optical element 19 and the surface of the object.
- the immersion space LS is formed so that K is filled with the liquid LQ.
- the object that can face the exit surface 20 and the lower surface 21 includes an object that can move on the exit side (image surface side) of the last optical element 19, and is within a predetermined plane that includes the irradiation position EP of the exposure light EL. Including movable objects.
- the object includes at least one of the substrate stage 12 and the substrate P held on the substrate stage 12.
- the substrate P held on the substrate stage 12 is disposed at the irradiation position EP of the exposure light EL so as to face the terminal optical element 19 and the liquid immersion member 13.
- the optical path K of the exposure light EL emitted from the exit surface 20 of the final optical element 19 is filled with the liquid LQ, so that the optical path K between the final optical element 19 and the liquid immersion member 13 and the substrate P is filled.
- the liquid LQ is held and the immersion space LS is formed.
- the immersion space LS is formed so that a partial region of the surface of the substrate P including the projection region PR of the projection optical system PL is covered with the liquid LQ.
- the interface (meniscus, edge) LG of the liquid LQ is formed between the lower surface 21 of the liquid immersion member 13 and the surface of the substrate P. That is, the exposure apparatus EX of the present embodiment employs a local liquid immersion method.
- FIGS. 4 is a side sectional view parallel to the YZ plane showing the vicinity of the liquid immersion member 13
- FIG. 5 is a side sectional view parallel to the XZ plane
- FIG. 6 shows the liquid immersion member 13 on the lower side ( ⁇ Z side). It is the perspective view seen from.
- the liquid immersion member 13 is an annular member and is disposed around the optical path K of the exposure light EL.
- the liquid immersion member 13 includes an upper plate portion 22 disposed around the terminal optical element 19, at least a part of the exit surface 20 of the terminal optical element 19 and the surface of the substrate P in the Z-axis direction. And a lower plate portion 23 disposed between the two.
- the upper plate portion 22 is opposed to the outer peripheral surface of the last optical element 19 and has an inner peripheral surface formed along the outer peripheral surface.
- the inner peripheral surface of the upper plate portion 22 and the outer peripheral surface of the last optical element 19 are opposed to each other with a predetermined gap.
- the lower plate part 23 has an opening 24 in the center.
- the exposure light EL emitted from the exit surface 20 of the last optical element 19 can pass through the opening 24.
- the exposure light EL emitted from the emission surface 20 passes through the opening 24 and is irradiated onto the surface of the substrate P through the liquid LQ.
- the cross-sectional shape of the exposure light EL in the opening 24 is a substantially rectangular shape (slit shape) whose longitudinal direction is the X-axis direction.
- the opening 24 is formed in a substantially rectangular shape (slit shape) in the XY direction according to the cross-sectional shape of the exposure light EL.
- the cross-sectional shape of the exposure light EL in the opening 24 and the shape of the projection region PR of the projection optical system PL on the substrate P are substantially the same.
- the liquid immersion member 13 has an upper surface 33 that is disposed around the optical path K and faces the exit surface 20 of the last optical element 19 with a predetermined gap therebetween.
- the upper surface 33 includes the upper surface of the lower plate portion 23.
- the upper surface 33 is flat and substantially parallel to the XY plane.
- the upper surface 33 is disposed around the opening 24.
- the lower surface 21 of the liquid immersion member 13 includes a first surface 25 disposed around the optical path K of the exposure light EL, a second surface 26 disposed at a part of the periphery of the first surface 25, and the first surface 25.
- 3rd surface 27 arrange
- the first surface 25 holds the liquid LQ with the substrate P during the exposure of the substrate P.
- the first surface 25 is flat and substantially parallel to the surface (XY plane) of the substrate P.
- the outer shape of the first surface 25 in the XY plane is a rectangular shape.
- the outer shape of the first surface 25 is long in the X-axis direction, has a size W11 in the X-axis direction, and has a size L11 in the Y-axis direction.
- the first surface 25 includes the lower surface of the lower plate portion 23.
- the first surface 25 is disposed around the opening 24.
- the first surface 25 cannot recover the liquid LQ.
- the second surface 26 is disposed outside the first surface 25 with respect to the optical path K of the exposure light EL.
- the second surface 26 is disposed on both sides of the optical path K of the exposure light EL with respect to the Y-axis direction.
- the second surface 26 is provided on each of one side (+ Y side) and the other side ( ⁇ Y side) in the Y-axis direction with respect to the first surface 25.
- the second surface 26 can hold the liquid LQ with the surface of the substrate P during the exposure of the substrate P.
- the second surface 26 is disposed at a position farther from the first surface 25 than the surface of the substrate P.
- the second surface 26 is inclined so as to gradually move away from the surface of the substrate P in a direction (radiation direction) away from the optical path of the exposure light EL with respect to the Y-axis direction.
- the second surface 26 cannot recover the liquid LQ.
- the ⁇ Y side edge of the second surface 26 arranged on the + Y side with respect to the optical path K of the exposure light EL and the + Y side edge of the first surface 25 are different positions in the Z-axis direction ( Height). Further, the + Y side edge of the second surface 26 arranged on the ⁇ Y side with respect to the optical path K of the exposure light EL and the ⁇ Y side edge of the first surface 25 are at different positions (heights) in the Z-axis direction. ). In the present embodiment, a step 28 is formed between the first surface 25 and the second surface 26.
- the outer shape of the second surface 26 in the XY plane is a trapezoid whose upper side is a portion adjacent to the + Y side and ⁇ Y side edges of the first surface 25.
- the third surface 27 is disposed outside the first surface 25 with respect to the optical path K of the exposure light EL.
- the third surface 27 is disposed on both sides of the optical path K of the exposure light EL with respect to the X-axis direction.
- the third surface 27 is provided on each of one side (+ X side) and the other side ( ⁇ X side) in the X-axis direction with respect to the first surface 25.
- the third surface 27 includes a liquid recovery surface capable of recovering the liquid LQ.
- the third surface 27 is substantially parallel to the surface (XY plane) of the substrate P.
- the third surface 27 can collect the liquid LQ on the substrate P facing the third surface 27 during the exposure of the substrate P.
- the third surface 27 includes the surface (lower surface) of the porous member 30. At least a part of the liquid LQ on the substrate P disposed at a position facing the third surface 27 is collected through the hole of the porous member 30.
- the third surface 27 can collect the liquid LQ that has contacted the third surface 27 (the surface of the porous member 30).
- the position of the first surface 25 and the position of the third surface 27 are different with respect to the Z-axis direction.
- the ⁇ X side edge of the third surface 27 arranged on the + X side with respect to the optical path K of the exposure light EL and the + X side edge of the first surface 25 are different positions in the Z-axis direction ( Height).
- the + X side edge of the third surface 27 arranged on the ⁇ X side with respect to the optical path K of the exposure light EL and the ⁇ X side edge of the first surface 25 are different positions (heights) in the Z-axis direction. ).
- the third surface 27 is disposed on the + Z side with respect to the first surface 25. That is, the third surface 27 is disposed at a position farther from the first surface 25 than the surface of the substrate P. In the present embodiment, a step 29 is formed between the first surface 25 and the third surface 27.
- the outer shape of the third surface 27 in the XY plane is a trapezoid whose upper side is a portion adjacent to the + X side and ⁇ X side edges of the first surface 25.
- Each of the third surfaces 27 has a size W12 in the X-axis direction and a size L12 in the Y-axis direction.
- the liquid immersion member 13 has a liquid supply port 31 for supplying the liquid LQ and a liquid recovery port 32 for recovering the liquid LQ.
- the liquid supply port 31 supplies the liquid LQ toward the optical path K in order to form the immersion space LS.
- the liquid recovery port 32 recovers at least a part of the liquid LQ on the substrate P facing the lower surface 21 of the liquid immersion member 13.
- the liquid supply port 31 is disposed at a predetermined position of the liquid immersion member 13 so as to face the optical path K in the vicinity of the optical path K.
- the liquid supply port 31 is disposed in the vicinity of the space between the emission surface 20 and the upper surface 33.
- the liquid supply port 31 is connected to a liquid supply device 35 via a flow path 34.
- the liquid supply device 35 can deliver clean and temperature-adjusted liquid LQ.
- the flow path 34 includes a supply flow path formed inside the liquid immersion member 13 and a flow path formed by a supply pipe that connects the supply flow path and the liquid supply device 35.
- the liquid LQ delivered from the liquid supply device 35 is supplied to the liquid supply port 31 via the flow path 34.
- the liquid supply port 31 supplies the liquid LQ from the liquid supply device 35 to the optical path K.
- the liquid recovery port 32 is disposed at a predetermined position of the liquid immersion member 13 so as to face the surface of the substrate P.
- the liquid recovery port 32 is disposed outside the first surface 25 with respect to the optical path K.
- the liquid recovery ports 32 are disposed on both sides of the optical path K in the X axis direction.
- a plate-like porous member 30 including a plurality of holes (openings or pores) is disposed in the liquid recovery port 32. That is, in the present embodiment, the third surface (liquid recovery surface) 27 includes the surface (lower surface) of the porous member 30 disposed at the liquid recovery port 32.
- a mesh filter that is a porous member in which a large number of small holes are formed in a mesh shape may be disposed in the liquid recovery port 32.
- the liquid recovery port 32 (third surface 27) is connected to a liquid recovery device 37 via a flow path 36.
- the liquid recovery device 37 includes a vacuum system and can recover the liquid LQ by sucking it.
- the flow path 36 includes a recovery flow path formed inside the liquid immersion member 13 and a flow path formed by a recovery pipe that connects the recovery flow path and the liquid recovery device 37.
- the liquid LQ recovered from the liquid recovery port 32 (third surface 27) is recovered by the liquid recovery device 37 via the flow path.
- control device 15 executes the recovery operation of the liquid LQ using the liquid recovery port 32 in parallel with the supply operation of the liquid LQ using the liquid supply port 31, so that one terminal optical element is provided.
- the liquid immersion space LS can be formed with the liquid LQ between the liquid immersion member 19 and the liquid immersion member 13 and the substrate P (object) on the other side.
- the liquid immersion member 13 can hold the liquid LQ at least between the first surface 25 and the surface of the substrate P when the substrate P is disposed at a position facing the lower surface 21.
- at least the first surface 25 of the liquid immersion member 13 is lyophilic with respect to the liquid LQ, and even if the substrate P moves in the XY direction, the liquid LQ in the liquid immersion space LS You can keep in touch.
- FIG. 7A is a plan view showing a state where the cleaning tool 1 is held by the substrate holding part 12H
- FIG. 7B is a side sectional view.
- the outer shape of the base member 2 of the cleaning tool 1 is substantially the same as the outer shape of the substrate P.
- the substrate holding part 12H can hold the back surface 2B of the base member 2.
- the substrate holding part 12H holds the cleaning tool 1 (base member 2) in a releasable manner.
- the transport system 14 can transport the cleaning tool 1.
- the transport system 14 can carry (load) the cleaning tool 1 into the substrate holding unit 12H, and can carry out (unload) the cleaning tool 1 from the substrate holding unit 12H.
- the control device 15 moves the substrate stage 12 to the substrate replacement position CP when loading the cleaning tool 1 onto the substrate holding part 12H. Further, the control device 15 moves the substrate stage 12 to the substrate replacement position CP when unloading the cleaning tool 1 from the substrate holding part 12H.
- the irradiation position EP of the exposure light EL emitted from the exit surface 20 of the last optical element 19 is appropriately referred to as an exposure position EP.
- the control device 15 moves the substrate stage 12 to the substrate exchange position CP, and loads the substrate P before exposure onto the substrate stage 12 arranged at the substrate exchange position CP using the transport system 14.
- the control device 15 moves the substrate stage 12 holding the substrate P before exposure to the exposure position EP.
- the control device 15 sets the immersion space LS so that the optical path K between the last optical element 19 and the immersion member 13 and the substrate P held by the substrate stage 12 moved to the exposure position EP is filled with the liquid LQ. Form.
- the exposure apparatus EX of the present embodiment is a scanning exposure apparatus (so-called scanning stepper) that projects an image of the pattern of the mask M onto the substrate P while moving the mask M and the substrate P synchronously in a predetermined scanning direction.
- the control device 15 controls the mask stage 11 and the substrate stage 12 so that the mask M and the substrate P are in a predetermined plane in the XY plane that intersects the optical axis AX (the optical path K of the exposure light EL). Move in the scanning direction.
- the scanning direction (synchronous movement direction) of the substrate P is the Y-axis direction
- the scanning direction (synchronous movement direction) of the mask M is also the Y-axis direction.
- the control device 15 moves the substrate P in the Y-axis direction with respect to the projection region PR of the projection optical system PL, and in the illumination region IR of the illumination system IL in synchronization with the movement of the substrate P in the Y-axis direction.
- the substrate P is irradiated with the exposure light EL through the projection optical system PL and the liquid LQ in the immersion space LS on the substrate P while moving the mask M in the Y-axis direction.
- the pattern image of the mask M is projected onto the substrate P, and the substrate P is exposed with the exposure light EL.
- the exposed substrate P is unloaded from the substrate stage 12.
- the control device 15 moves the substrate stage 12 to the substrate exchange position CP in order to unload the exposed substrate P from the substrate stage 12.
- the control device 15 uses the transport system 14 to unload the exposed substrate P from the substrate stage 12 disposed at the substrate replacement position CP.
- the control device 15 repeats the load operation of the substrate P before exposure, the exposure operation of the substrate P, and the unload operation of the substrate P after exposure, and sequentially performs immersion exposure on the plurality of substrates P.
- a cleaning process for cleaning the members in the exposure apparatus EX using the cleaning tool 1 described above is executed at a predetermined timing.
- a method of cleaning the members in the exposure apparatus EX using the cleaning tool 1 will be described with reference to the flowchart of FIG. 8 and schematic diagrams of FIGS. 9A, 9B, 10, and 11.
- a case where the cleaning tool 1 is used to clean the lower surface 21 of the liquid immersion member 13 will be described as an example.
- the formation of the liquid immersion space LS is released. That is, when the cleaning process is performed, the liquid LQ is removed from the lower surface 21 side of the liquid immersion member 13. Further, the liquid supply port 31 and the supply channel of the liquid immersion member 13, the liquid recovery port 32 and the liquid LQ of the recovery channel are also removed.
- the first cleaning tool 1A having the cleaning member 3 soaked with the first cleaning liquid LC1 is carried into the exposure apparatus EX (step S1), and the first cleaning is performed.
- a process of carrying out the first cleaning tool 1A from the exposure apparatus EX step S3, and a cleaning member 3 infiltrated with a second cleaning liquid LC2 different from the first cleaning liquid LC1.
- Step S4 Processing to carry the cleaning tool 1B into the exposure apparatus EX (step S4) and a process of cleaning the lower surface 21 of the liquid immersion member 13 by bringing the cleaning member 3 of the second cleaning tool 1B soaked with the second cleaning liquid LC2 into contact with the lower surface 21 of the liquid immersion member 13 (S4).
- Step S5) after the cleaning process using the second cleaning tool 1B, the process of carrying out the second cleaning tool 1B from the exposure apparatus EX (Step S6), and the cleaning process using the first and second cleaning tools 1A and 1B
- a flushing process for supplying the liquid LQ step S7 is included.
- the first cleaning tool 1A is carried into the exposure apparatus EX.
- the first cleaning liquid LC1 is soaked in advance in the cleaning member 3 of the first cleaning tool 1A before executing the cleaning process.
- the first cleaning liquid LC1 is an alkali cleaning liquid containing alkali.
- the peripheral wall member 5 is in a dry state.
- the first cleaning tool 1 ⁇ / b> A is carried into a position facing the liquid immersion member 13 by the transport system 14 and the substrate stage 12.
- the transport system 14 loads the first cleaning tool 1 ⁇ / b> A onto the substrate stage 12, and the substrate stage 12 moves the first cleaning tool 1 ⁇ / b> A to a position facing the liquid immersion member 13.
- FIGS. 9A and 9B are schematic views showing an example of an operation for carrying the first cleaning tool 1A into a position facing the liquid immersion member 13.
- FIG. 9A the first cleaning tool 1A is loaded on the substrate holding part 12H of the substrate stage 12 arranged at the substrate exchange position CP.
- the control device 15 moves the substrate stage 12 to the substrate exchange position CP, and uses the transfer system 14 to move the substrate stage 12 to the substrate stage 12 (substrate holding unit 12H) disposed at the substrate exchange position CP. 1 Load the cleaning tool 1A.
- the substrate holding part 12H holds the back surface 2B of the base member 2 of the loaded first cleaning tool 1A.
- Step S1 the control device 15 moves the substrate stage 12 holding the first cleaning tool 1 ⁇ / b> A so that the first cleaning tool 1 ⁇ / b> A faces the liquid immersion member 13 (exposure position EP).
- the position (height) in the Z-axis direction of the substrate stage 12 when the substrate stage 12 is moved from the substrate replacement position CP to the exposure position EP while holding the first cleaning tool 1A The position can be set lower than the position (height) in the Z-axis direction of the substrate stage 12 when the substrate stage 12 is moved from the substrate exchange position CP to the exposure position EP while holding the substrate P.
- the movement speed (entry speed) of the substrate stage 12 when the substrate stage 12 is moved from the substrate exchange position CP to the exposure position EP while holding the first cleaning tool 1A is used to expose the substrate P. May be slower than the moving speed (entry speed) of the substrate stage 12 when moving the substrate stage 12 from the substrate exchange position CP to the exposure position EP.
- control device 15 moves the substrate stage 12 in the Z-axis direction to adjust the positional relationship between the first cleaning tool 1A held by the substrate holding portion 12H and the liquid immersion member 13 to obtain the first
- the cleaning member 3 soaked with the first cleaning liquid LC1 of the cleaning tool 1A is brought into contact with the lower surface 21 of the liquid immersion member 13 (step S2). Thereby, the lower surface 21 of the liquid immersion member 13 is cleaned by the first cleaning tool 1A.
- FIG. 10 is a view showing a state where the cleaning member 3 and the lower surface 21 of the liquid immersion member 13 are in contact with each other.
- the first and second heights H1 and H2 of the first and second cleaning members 3A and 3B are determined according to the shape of the lower surface 21 of the liquid immersion member 13.
- the lower surface 21 of the liquid immersion member 13 includes the first surface 25 and the third surface 27 that have different positions in the Z-axis direction.
- the upper surface 4A of the first cleaning member 3A is in contact with the first surface 25 while the first and second cleaning members 3A and 3B made of sponge are not contracted, and the upper surface of the second cleaning member 3B.
- the first and second heights H1 and H2 are determined so that 4B comes into contact with the third surface 27. Accordingly, the first surface 25 is satisfactorily cleaned by the first cleaning member 3A, and the third surface 27 is satisfactorily cleaned by the second cleaning member 3B.
- the control device 15 causes the Z-axis to press the upper surfaces 4A, 4B of the first and second cleaning members 3A, 3B against the first, third surfaces 25, 27 with a predetermined force.
- the position of the substrate stage 12 with respect to the direction is adjusted.
- the first and second cleaning members 3A and 3B made of sponge are slightly shrunk, and the upper surfaces 4A and 4B of the first and second cleaning members 3A and 3B and the first and third surfaces 25 and 27 are sufficient.
- the first and third surfaces 25 and 27 can be satisfactorily cleaned using the first and second cleaning members 3A and 3B.
- the control device 15 contacts the upper surfaces 4A, 4B of the first and second cleaning members 3A, 3B with the first and third surfaces 25, 27, and then the first, The first and third surfaces 25 and 27 of the liquid immersion member 13 are cleaned while the second cleaning members 3A and 3B are substantially stationary. That is, the control device 15 brings the first and second cleaning members 3A, 3B, 3A, 3B into contact with the upper surfaces 4A, 4B of the first and second cleaning members 3A, 3B and the first and third surfaces 25, 27, respectively.
- the positional relationship between 3B and the first and third surfaces 25 and 27 of the liquid immersion member 13 is fixed for a predetermined time.
- the size W1 of the first cleaning member 3A in the X-axis direction and the size W11 of the first surface 25 are substantially the same. Further, the size L1 of the first cleaning member 3A in the Y-axis direction is sufficiently larger than the size L11 of the first surface 25. Thereby, the whole area of the first surface 25 can be brought into contact with the upper surface 4A of the first cleaning member 3A. Accordingly, the first surface 25 can be satisfactorily cleaned with the first cleaning member 3A.
- the size W2 of the second cleaning member 3B in the X-axis direction and the size W12 of the third surface 27 are substantially the same.
- the size L2 of the second cleaning member 3B in the Y axis direction and the size L12 of the third surface 27 are substantially the same.
- the peripheral wall member 5 since the peripheral wall member 5 is disposed on the base member 2, leakage of the cleaning liquid LC is suppressed during the conveyance of the first cleaning tool 1A or during the cleaning process. Further, since the peripheral wall member 5 includes a sponge, the cleaning liquid LC that has oozed out from the cleaning member 3 during the conveyance of the first cleaning tool 1A or during the cleaning process can be collected (absorbed).
- the control device 15 replaces the substrate stage 12 holding the first cleaning tool 1A with the substrate in order to carry out the first cleaning tool 1A from the exposure apparatus EX. Move to position CP. Then, the control device 15 uses the transport system 14 to unload the first cleaning tool 1A from the substrate stage 12 disposed at the substrate replacement position CP. Thereby, the 1st cleaning tool 1A is carried out from the exposure apparatus EX (step S3).
- the second cleaning tool 1B is carried into the exposure apparatus EX.
- the second cleaning liquid LC2 has been impregnated in advance into the cleaning member 3 of the second cleaning tool 1B before executing the cleaning process.
- the second cleaning liquid LC2 is water (pure water).
- the peripheral wall member 5 is in a dry state.
- the first cleaning tool 1A and the second cleaning tool 1B are the same in structure, size, etc., except that the type of cleaning liquid soaked into the cleaning member 3 is different.
- the control device 15 uses the transport system 14 to load the second cleaning tool 1B onto the substrate stage 12, move the substrate stage 12, and place the second cleaning tool 1B at a position facing the liquid immersion member 13. (Step S4).
- the operation of disposing the second cleaning tool 1B at a position facing the liquid immersion member 13 is substantially the same as the operation of disposing the first cleaning tool 1A at a position facing the liquid immersion member 13 (step S1). Description is omitted.
- control device 15 moves the substrate stage 12 in the Z-axis direction, adjusts the positional relationship between the second cleaning tool 1B held by the substrate holding part 12H and the liquid immersion member 13, and sets the second The cleaning member 3 soaked with the second cleaning liquid LC2 of the cleaning tool 1B is brought into contact with the lower surface 21 of the liquid immersion member 13 (step S5). Thereby, the lower surface 21 of the liquid immersion member 13 is cleaned by the second cleaning tool 1B.
- the control device 15 cleans the liquid immersion member 13 with the cleaning member 3 of the second cleaning tool 1B substantially stationary. Since the operation at the time of the cleaning process using the second cleaning tool 1B is substantially the same as the operation at the time of the cleaning process using the first cleaning tool 1A (step S2), the description thereof is omitted.
- the control device 15 replaces the substrate stage 12 holding the second cleaning tool 1B with the substrate in order to carry out the second cleaning tool 1B from the exposure apparatus EX. Move to position CP. Then, the control device 15 uses the transport system 14 to unload the second cleaning tool 1B from the substrate stage 12 disposed at the substrate replacement position CP. Thereby, the 2nd cleaning tool 1B is carried out from the exposure apparatus EX (step S6).
- step S7 In order to remove the cleaning liquid LC from the lower surface 21 of the liquid immersion member 13 after the cleaning process using the first and second cleaning tools 1A and 1B and before the exposure of the substrate P using the liquid LQ, the control device 15 A flushing process for supplying the liquid LQ from the supply port 31 is executed (step S7).
- FIG. 11 is a diagram showing a state where the flushing process is being performed using the liquid LQ.
- the dummy substrate DP is held by the substrate holding unit 12H.
- the dummy substrate DP is a (clean) member having a high degree of cleanliness that is difficult to release foreign matter, different from the exposure substrate P.
- the dummy substrate DP has substantially the same outer shape as the substrate P, and the substrate holding unit 12H can hold the dummy substrate DP.
- a liquid-repellent protective film topcoat film
- topcoat film is formed on the liquid LQ to form a dummy substrate DP. be able to.
- the control device 15 is in parallel with the operation of supplying the liquid LQ using the liquid supply port 31 in a state where the dummy substrate DP held by the substrate holding portion 12H is disposed at a position facing the terminal optical element 19 and the liquid immersion member 13. Then, the liquid LQ recovery operation using the liquid recovery port 32 is executed. Thereby, the cleaning liquid LC remaining on the lower surface 21 of the liquid immersion member 13, the porous member 30, the supply flow path 34, the recovery flow path 36, and the like is washed away.
- the types of the first cleaning liquid LC1 (alkaline cleaning liquid) and the exposure liquid LQ (pure water) are different. By removing the cleaning liquid LC using the exposure liquid LQ before the exposure of the substrate P, the cleaning liquid LC is mixed into the liquid LQ that fills the optical path K during the subsequent exposure of the substrate P. It is suppressed.
- the substrate P is held by the substrate holding part 12H, and the exposure process for the substrate P is executed.
- the exposed substrate P is subjected to predetermined process processing such as development processing.
- the liquid immersion member 13 in the exposure apparatus EX can be efficiently and satisfactorily cleaned using the cleaning tool 1. Therefore, the occurrence of defective exposure due to contamination of the liquid immersion member 13 can be suppressed, and the occurrence of defective devices can be suppressed.
- a substance for example, a photosensitive material generated (eluted) from the substrate P may be mixed in the liquid LQ.
- the substance mixed in the liquid LQ may adhere to the lower surface 21 of the liquid immersion member 13 as a foreign substance (contaminant).
- not only substances generated from the substrate P but also foreign substances floating in the air may enter the liquid LQ and adhere to the lower surface 21 of the liquid immersion member 13.
- the third surface 27 also continues to collect the liquid LQ during the exposure of the substrate P and keeps in contact with the liquid LQ, so that there is a high possibility of being contaminated.
- the foreign matter may adhere to the substrate P during exposure or the liquid LQ supplied from the liquid supply port 31 may be removed. There is a possibility of contamination. As a result, an exposure failure may occur, for example, a defect may occur in a pattern formed on the substrate P.
- the lower surface 21 of the liquid immersion member 13 can be satisfactorily cleaned using the cleaning tool 1. Therefore, it is possible to suppress the occurrence of defective exposure of the substrate P exposed after the cleaning process.
- the distance between the surface 2A of the substrate 2 and the liquid immersion member 13 is reduced so that the first cleaning member 3A and the second surface 26 of the liquid immersion member 13 are in contact with each other. May be.
- the surface of the first cleaning member 3A may be inclined so as to gradually increase from the center of the first cleaning member 3A toward the edge in the Y-axis direction.
- a cleaning member different from the first cleaning member 3A may be provided on both sides in the Y-axis direction of the first cleaning member 3A.
- the arrangement and size of the cleaning member on the XY plane and the height of the cleaning member may be determined in accordance with the shape and size of the lower surface 21 of the liquid immersion member 13.
- FIG. 12 is a perspective view of the liquid immersion member 13B according to the second embodiment as viewed from below ( ⁇ Z side).
- the lower surface 21B of the liquid immersion member 13B includes a first surface 25B that holds the liquid LQ between the substrate P and the third surface disposed around the first surface 25B during the exposure of the substrate P. 27B.
- the first surface 25B is substantially parallel to the surface (XY plane) of the substrate P.
- the outer shape of the first surface 25B in the XY plane is substantially square.
- the third surface 27B includes a liquid recovery surface.
- the third surface 27 ⁇ / b> B includes the surface (lower surface) of the porous member 30 disposed in the liquid recovery port 32.
- the third surface 27B is substantially parallel to the surface (XY plane) of the substrate P.
- the third surface 27B is disposed so as to surround the optical path K of the exposure light EL and the first surface 25B.
- the position of the first surface 25B and the position of the third surface 27B are different with respect to the Z-axis direction.
- the third surface 27B is disposed on the + Z side with respect to the first surface 25B. That is, the third surface 27B is arranged at a position farther from the first surface 25B than the surface of the substrate P.
- a step 29B is formed between the first surface 25B and the third surface 27B.
- FIG. 13 is a plan view showing a state where the cleaning tool 101 according to the present embodiment is held by the substrate holder 2H.
- the cleaning tool 101 includes a first cleaning member 3D having an upper surface 4D that can be in contact with the first surface 25B of the liquid immersion member 13B, and a second cleaning member 3E having an upper surface 4E that can be in contact with the third surface 27B.
- a member 3 is provided.
- the first and second cleaning members 3D and 3E are disposed on the base member 2.
- a peripheral wall member 5 is disposed around the first and second cleaning members 3D and 3E.
- the outer shape of the upper surface 4D of the first cleaning member 3D and the outer shape of the first surface 25B of the liquid immersion member 13B are substantially the same.
- the outer shape of the upper surface 4E of the second cleaning member 3E and the outer shape of the third surface 27B of the liquid immersion member 13B are substantially the same.
- the second cleaning member 3E is higher than the first cleaning member 3D with respect to the surface 2A of the base member 2.
- the first cleaning member 3D and the first surface 25B are sufficiently in contact with each other, and the second cleaning member 3E and the third surface 27B are sufficiently in contact with each other.
- the three surfaces 25B and 27B can be cleaned satisfactorily.
- the height of the first and second cleaning members 3A, 3B (3D, 3E) is increased according to the shape of the lower surface 21 (21B) of the liquid immersion member 13 (13B).
- the first height H1 of the first cleaning member 3A and the second height H2 of the second cleaning member 3B are, for example, as in the cleaning tool 1C shown in FIG. It may be the same. Since the first and second cleaning members 3A and 3B made of sponge expand and contract, the first height H1 and the second height H2 are different in a non-contracted state (a state where no external force is applied).
- the first and second cleaning members 3A and 3B against the lower surface 21 of the liquid immersion member 13, the first and third surfaces 25 and 27 of the liquid immersion member 13, the first and second cleaning members 3A, The upper surfaces 4A and 4B of 3B can be brought into contact with each other. Further, with respect to the Z-axis direction, when the first surface 25 and the third surface 27 of the liquid immersion member 13 are at the same position (height), that is, when the first surface 25 and the third surface 27 are flush with each other. The first and third surfaces 25 and 27 can be satisfactorily cleaned by performing the cleaning process using the cleaning tool having the first and second cleaning members 3A and 3B having the same height relative to the surface 2A of the base member 2. .
- the cleaning tool illustrated in FIG. As in 1D the cleaning member 3F may be a single member.
- the first portion 3G and the second portion 3H having different heights relative to the surface 2A of the base member 2 can be provided on one cleaning member 3F.
- the upper surface of the cleaning member 3F may be flat.
- the liquid immersion member 13 is cleaned with the cleaning member 3 substantially stationary.
- the liquid immersion member 13 may be cleaned by relatively moving the cleaning member 3 and the liquid immersion member 13 in the XY directions.
- the transport system 14 capable of transporting the substrate P performs the operation of loading the cleaning tool 1 onto the substrate stage 12 and the operation of unloading from the substrate stage 12.
- a transport system for transporting the cleaning tool 1 may be provided separately from the transport system 14 capable of transporting P, and the operation of loading and unloading the cleaning tool 1 may be executed using the transport system. Good.
- an operator may execute an operation of loading the cleaning tool 1 onto the substrate stage 12 and an operation of unloading the cleaning tool 1 from the substrate stage 12.
- the cleaning member 3 is a sponge
- the embodiment is not limited to a sponge.
- Any porous member that has a small influence on the member to be cleaned and can be infiltrated with the cleaning liquid LC can be employed as the cleaning member 3.
- a sintered member for example, a sintered metal
- a foamed member for example, a foamed metal
- the cleaning member 3 is not limited to the porous member.
- a bundle of fibrous members such as a brush, a clean paper for clean rooms, or the like may be used.
- peripheral wall member 5 is lower than the cleaning member 3 with respect to the surface 2A of the base member 2
- the case where the peripheral wall member 5 is lower than the cleaning member 3 with respect to the surface 2A of the base member 2 has been described as an example, but may be the same or higher.
- the peripheral wall member 5 is a sponge
- the embodiment is not limited to a sponge.
- a peripheral wall member having an arbitrary structure can be employed.
- the leakage of the cleaning liquid LC can be suppressed by using a sintered member (for example, sintered metal), a foamed member (for example, foamed metal) or the like in which a large number of pores are formed as the peripheral wall member 5.
- the cleaning liquid LC that has oozed out from the cleaning member 3 can be collected (absorbed).
- the peripheral wall member 5 may not be a porous member.
- a metal ring member may be used. Thereby, leakage of the cleaning liquid LC to the outside of the base member 2 can be suppressed.
- the peripheral wall member 5 may be omitted.
- the cleaning tool 1 ⁇ / b> J is provided with a cleaning member 3 ⁇ / b> J having an upper surface 4 ⁇ / b> J that can come into contact with the ejection surface 20 through the opening 24 of the liquid immersion member 13.
- the surface 20 can be cleaned.
- the case where the liquid immersion member 13 has the lower plate portion 23 facing a part of the exit surface 20 of the last optical element 19 has been described as an example.
- FIG. thus, when the liquid immersion member 13K having a structure in which the lower plate portion 23 is omitted and having a lower surface 21K that is substantially flush with the exit surface 20 of the last optical element 19, a cleaning tool as shown in FIG. Using the 1K cleaning member 3K, the lower surface 21K of the liquid immersion member 13K and the exit surface 20 of the last optical element 19 can be simultaneously cleaned.
- the cleaning liquid LC may be supplied from the cleaning liquid supply source (not shown) to the cleaning member 3 in the exposure apparatus EX.
- the exposure apparatus EX includes a liquid supply source
- the cleaning liquid LC is supplied from the liquid supply source to the upper surface of the member in the exposure apparatus (for example, the upper surface 12T of the substrate stage 12), and the upper surface of the member. May be cleaned.
- a plurality of cleaning liquids for example, LC1 and LC2
- only a part of the plurality of cleaning liquids may be supplied to the cleaning member 3 in the exposure apparatus EX.
- the members in the exposure apparatus EX to be cleaned include, for example, a part of the projection optical system PL (including the lens barrel), a part of the mask stage 11, a part of the substrate stage 12, It may be a part of the illumination system IL.
- a part of the projection optical system PL including the lens barrel
- the mask holding unit 1H of the mask stage 11 a part of the illumination system IL and / or projection by the cleaning tool held by the mask holding unit 1H.
- a part of the optical system PL can be cleaned.
- the exposure apparatus EX is an immersion exposure apparatus that exposes the substrate P via the liquid LQ
- the optical path K of the exposure light EL is not filled with the liquid.
- a dry type exposure apparatus filled with gas may be used. Even in the case of a dry type exposure apparatus, the exit surface of the terminal optical element of the projection optical system can be cleaned using the cleaning tool described in the above embodiments.
- FIG. 18 is a side sectional view showing an example of the cleaning tool 501 according to the third embodiment
- FIG. 19 is a plan view.
- the cleaning tool 501 is carried into the exposure apparatus EX that exposes the substrate P with the exposure light EL via the liquid LQ, and the members and / or components (hereinafter referred to as members to be cleaned) in the exposure apparatus EX. At least a portion of which is cleaned.
- the cleaning tool 501 includes a circular perforated plate 502 and a base member 503 that supports the perforated plate 502.
- the perforated plate 502 has a surface 502A, a back surface 502B opposite to the surface 502A, and a plurality of holes 502H communicating the surface 502A and the back surface 502B opposite to the surface 502A.
- the cleaning tool 501 has an internal space 504 facing the back surface 502B.
- the internal space 504 includes at least a part of the space between the base member 503 and the perforated plate 502.
- the internal space 504 can hold the cleaning liquid LC.
- the cleaning tool 501 includes a porous member 505 disposed in the internal space 504. At least a part of the liquid LC in the internal space 504 is held by the porous member 505.
- the holes of the porous member 505 include open pores. Open pores are pores connected to the outside air. The open pores can hold the flowing liquid.
- the porous member 505 may include closed pores. Note that the porous member 505 may not be disposed in the internal space 504 as long as the liquid LC can be retained.
- the base member 503 includes a plate portion 503A and a peripheral wall portion 503B disposed along the periphery of the upper surface 503C of the plate portion 503A.
- the internal space 504 includes at least a part of the space between the upper surface 503C of the plate portion 503A and the back surface 502B of the porous plate 502.
- a plurality of perforated plates 502 are arranged in the peripheral region of the back surface 502B, and porous from each of the first convex portion 506A and the first convex portion 506A that protrude from the back surface 502B in a direction substantially perpendicular to the back surface 502B.
- a second protrusion 506B protruding outward in the radial direction with respect to the center of the plate 502;
- the first and second convex portions 506A and 506B are arranged at substantially equal intervals in the peripheral region of the back surface 502B.
- the peripheral wall portion 503B of the base member 503 has a concave portion 507 into which the second convex portion 506B is inserted.
- the concave portions 507 are arranged at substantially equal intervals on the inner surface of the peripheral wall portion 503B.
- 1st convex part 506A and 2nd convex part 506B are integral.
- the first convex portion 506A and the porous plate 502 are fixed.
- the porous plate 502 and the base member 503 are connected by holding the second convex portion 506B of the porous plate 502 in the concave portion 507.
- a predetermined gap is formed between the edge (outer surface) of the porous plate 502 and the inner surface of the peripheral wall portion 503B.
- the gap is a size that suppresses leakage of the liquid LC in the internal space 504.
- the porous plate 502 and the base member 503 are not firmly fixed, for example, even if the porous plate 502 is thermally expanded, the porous plate 502 is greatly deformed. Can be suppressed.
- the material of the perforated plate 502 is selected according to the member to be cleaned in the exposure apparatus EX.
- the porous plate 502 is made of the same material as the member to be cleaned.
- the porous plate 502 is made of titanium. The porous plate 502 may not be made of the same material as the member to be cleaned.
- the porous member 505 is also made of the same material as the member to be cleaned.
- the porous member 505 is a porous body made of titanium.
- the porous member 505 may not be the same material as the member to be cleaned.
- the porous plate 502 and the porous member 505 need not be the same material.
- the base member 503 is made of ceramics.
- base member 503 includes silicon carbide (SiC). Since the rigidity of the ceramic containing silicon carbide is high, the rigidity of the entire cleaning tool 501 is ensured. Note that the base member 503 may not be made of ceramics.
- the cleaning liquid LC is a liquid that can clean the members in the exposure apparatus EX.
- the liquid LC is, for example, a liquid that can remove foreign matters (contaminants) attached to members in the exposure apparatus EX.
- an alkali cleaning liquid containing alkali can be used as the liquid LC.
- the cleaning liquid LC can be diluted with the exposure liquid LQ.
- pure water water
- an alkaline aqueous solution is used as the cleaning liquid LC.
- the liquid LC includes an aqueous solution of tetramethylammonium hydroxide (TMAH).
- TMAH tetramethylammonium hydroxide
- the liquid LC is not limited to the alkaline aqueous solution, and for example, isopropyl alcohol (IPA) may be used.
- the surface 502A of the porous plate 502 is liquid repellent with respect to the liquid LQ and the liquid LC.
- the surface 502A of the porous plate 502 is formed of a film containing a liquid repellent material such as fluorine.
- the size of the 50 holes 2H is optimized, and the liquid LC in the internal space 504 leaks to the outside (on the surface 502A side) through the holes 502H, or the liquid LC in the vaporized internal space 504 is obtained. Is prevented from being released to the outside through the holes 502H.
- the outer shape of the cleaning tool 501 is substantially the same as the outer shape of the substrate P.
- the substrate P includes a semiconductor wafer.
- the outer shape of the cleaning tool 501 in the XY plane is substantially circular and has substantially the same diameter as the substrate P.
- the cleaning tool 501 has substantially the same thickness as the substrate P.
- the cleaning tool 501 has an upper surface 501A substantially parallel to the XY plane, and a lower surface 501B opposite to the upper surface 501A.
- the upper surface 501A includes a surface 502A of the perforated plate 502 and an upper surface 503D of a base member 503 (peripheral wall portion 503B) disposed around the surface 502A.
- a lower surface 501B opposite to the upper surface 501A includes a lower surface 503E of the plate portion 503A of the base member 503.
- the outer shape of the cleaning tool 501 does not have to be the same as the outer shape of the substrate P, but it is desirable that the cleaning tool 501 can be transported by a transport member that transports the substrate P as described later.
- FIG. 20 is a schematic block diagram that shows one example of an exposure apparatus EX according to the present embodiment.
- the exposure apparatus EX of the present embodiment is an immersion exposure apparatus that exposes a substrate P with exposure light EL through an exposure liquid LQ.
- pure water water is used as the liquid LQ.
- the exposure apparatus EX is a substrate that can move while holding the substrate P as disclosed in, for example, US Pat. No. 6,897,963 and European Patent Application No. 1713113.
- the exposure apparatus includes a stage 12 and a movable measurement stage 13 that is mounted with a measuring device C that measures the exposure light EL without holding the substrate P.
- an exposure apparatus EX includes a mask stage 11 that can move while holding a mask M, a substrate stage 512 that can move while holding a substrate P, and a measurement stage 513 that can move by mounting a measuring instrument C.
- an illumination system IL that illuminates the mask M with the exposure light EL
- a projection optical system PL that projects an image of the pattern of the mask M illuminated with the exposure light EL onto the substrate P, and at least a part of the optical path of the exposure light EL
- a liquid immersion member 514 that can form an immersion space LS so that the liquid LQ is filled with the liquid LQ
- a transport system 515 that can transport the substrate P
- a control device 516 that controls the operation of the entire exposure apparatus EX.
- the illumination system IL illuminates a predetermined illumination area IR with exposure light EL having a uniform illuminance distribution.
- the illumination area IR includes the irradiation position of the exposure light EL emitted from the illumination system IL.
- the mask stage 11 is movable to the illumination area IR.
- the mask stage 11 has a mask holding part 11H that holds the mask M in a releasable manner.
- the mask holding unit 11H holds the mask M so that the pattern formation surface (lower surface) of the mask M and the XY plane are substantially parallel.
- the mask stage 11 is movable in three directions, ie, the X axis, the Y axis, and the ⁇ Z direction while holding the mask M by the operation of a drive system including an actuator such as a linear motor.
- Projection optical system PL irradiates exposure light EL to a predetermined projection region PR.
- the projection region PR includes the irradiation position of the exposure light EL emitted from the projection optical system PL.
- the substrate stage 512 is movable to the projection region PR.
- the substrate stage 512 is movable on the guide surface 518G of the base member 518 including the projection region PR.
- the substrate stage 512 has a substrate holding part 512H that holds the substrate P in a releasable manner.
- the substrate holding part 512H includes a so-called pin chuck mechanism as disclosed in, for example, US Patent Publication No. 2007/0177125.
- the substrate holding unit 512H holds the substrate P so that the surface (exposure surface) of the substrate P and the XY plane are substantially parallel.
- the substrate stage 512 can be moved in six directions including the X axis, the Y axis, the Z axis, the ⁇ X, the ⁇ Y, and the ⁇ Z directions while holding the substrate P by the operation of a drive system including an actuator such as a linear motor. It is.
- the substrate stage 512 has an upper surface 512T disposed around the substrate holding part 512H.
- the substrate holding part 512H is disposed in a recess 512C provided on the substrate stage 512.
- the upper surface 512T of the substrate stage 512 is a flat surface substantially parallel to the XY plane.
- the surface of the substrate P held by the substrate holding part 512H and the upper surface 512T of the substrate stage 512 are arranged in substantially the same plane (substantially flush).
- the measurement stage 513 can be moved to the projection region PR.
- the measurement stage 513 is movable on the guide surface 518G of the base member 518 including the projection region PR.
- the measurement stage 513 moves in six directions including the X axis, the Y axis, the Z axis, the ⁇ X, the ⁇ Y, and the ⁇ Z directions with the measuring instrument C mounted by the operation of a drive system including an actuator such as a linear motor. Is possible.
- the measurement stage 513 has an upper surface 513T.
- An upper surface 513T of the measurement stage 513 is a flat surface substantially parallel to the XY plane.
- the position information of the mask stage 11, the substrate stage 512, and the measurement stage 513 is measured by an interferometer system (not shown).
- the control device 516 When executing the exposure process of the substrate P or when performing a predetermined measurement process, the control device 516 performs mask stage 11 (mask M) and substrate stage 512 (substrate P) based on the measurement result of the interferometer system. , And position control of the measurement stage 513 (measurement device C).
- the liquid immersion member 514 can form an immersion space LS so that at least a part of the optical path of the exposure light EL is filled with the liquid LQ.
- the immersion space LS is a portion (space, region) filled with the liquid LQ.
- the liquid immersion member 514 is disposed in the vicinity of the terminal optical element 21 closest to the image plane of the projection optical system PL among the plurality of optical elements of the projection optical system PL.
- the liquid immersion member 514 is an annular member and is disposed around the optical path of the exposure light EL.
- at least a part of the liquid immersion member 514 is disposed around the terminal optical element 21.
- the last optical element 21 has an exit surface 22 that emits the exposure light EL toward the image plane of the projection optical system PL.
- the immersion space LS is an optical path of the exposure light EL between the terminal optical element 21 and an object disposed at the irradiation position (projection region PR) of the exposure light EL emitted from the terminal optical element 21. Is filled with the liquid LQ.
- the object that can be arranged in the projection region PR includes at least one of the substrate stage 512, the substrate P held on the substrate stage 512, the measurement stage 513, and the measuring instrument C mounted on the measurement stage 513. .
- the liquid immersion member 514 has a lower surface 523 that can face an object disposed in the projection region PR.
- the space between the lower surface 523 of the liquid immersion member 514 and the surface of the substrate P can hold the liquid LQ so that the optical path of the exposure light EL incident on the substrate P is filled with the liquid LQ during the exposure of the substrate P. is there.
- the optical path of the exposure light EL between the last optical element 21 and the object is filled with the liquid LQ.
- the immersion space LS is formed as described above.
- the immersion space LS is formed so that a part of the surface of the substrate P including the projection region PR is covered with the liquid LQ when the substrate P is irradiated with the exposure light EL. At least a part of the interface (meniscus, edge) LG of the liquid LQ is formed between the lower surface 523 of the liquid immersion member 514 and the surface of the substrate P. That is, the exposure apparatus EX of the present embodiment employs a local liquid immersion method.
- control device 516 includes a substrate stage 512 and a measurement stage.
- the upper surface 512T and the upper surface 513T approaching or in contact with each other so that at least one of 513 continues to form a space capable of holding the liquid LQ between the last optical element 21 and the liquid immersion member 514
- the upper surface 512T and The substrate stage 512 and the measurement stage 513 can be synchronously moved in the XY directions with respect to the last optical element 21 and the liquid immersion member 514 while making at least one of the upper surface 513T face the emission surface 22 and the lower surface 523.
- the control device 516 can form the immersion space LS between the terminal optical element 21 and the liquid immersion member 514 and the substrate stage 512, and the terminal optical element 21, the liquid immersion member 514 and the measurement stage 513.
- the immersion space LS of the liquid LQ is movable between the upper surface 512T of the substrate stage 512 and the upper surface 513T of the measurement stage 513 while suppressing leakage of the liquid LQ.
- the operation of synchronously moving the substrate stage 512 and the measurement stage 513 in the XY directions is appropriately referred to as scram movement.
- the transport system 515 includes a transport member 524 that can transport the substrate P while supporting it.
- the transport member 524 can perform at least one of a loading operation (loading operation) of the substrate P before exposure to the substrate holding portion 512H and an unloading operation (unloading operation) of the substrate P after exposure from the substrate holding portion 512H. is there.
- the control device 516 uses the transfer system 515 to unload the substrate stage 512 (substrate holding unit 512H) from the substrate stage 512 (unloading) and unloads the substrate P after exposure, and the substrate before exposure to be exposed next.
- Substrate replacement processing including a loading operation for loading (loading) P into the substrate stage 512 (substrate holding unit 512H) can be executed.
- FIG. 21 is a side sectional view showing the vicinity of the liquid immersion member 514.
- the state in which the substrate P is disposed at a position facing the exit surface 22 of the last optical element 21 and the lower surface 523 of the liquid immersion member 514 will be mainly described as an example.
- objects other than the substrate P such as the substrate stage 512 and the measurement stage 513 can be arranged at positions facing the exit surface 22 of the last optical element 21 and the lower surface 523 of the liquid immersion member 514.
- the liquid immersion member 514 is an annular member and is disposed around the optical path of the exposure light EL. At least a part of the liquid immersion member 514 is disposed around the terminal optical element 21.
- the liquid immersion member 514 includes a plate portion 525 that is at least partially disposed between the exit surface 22 of the last optical element 21 and the surface of the substrate P in the Z-axis direction.
- the plate portion 525 has an opening 526 at the center.
- the plate portion 525 is disposed around the opening 526 and can be opposed to the substrate P (object) disposed at the irradiation position (projection region PR) of the exposure light EL, and an upper surface opposite to the lower surface 527. 528.
- At least a part of the upper surface 528 opposite to the lower surface 527 is opposed to a part of the emission surface 22.
- the exposure light EL emitted from the emission surface 22 can pass through the opening 526.
- the exposure light EL emitted from the emission surface 22 passes through the opening 526 and is irradiated on the surface of the substrate P through the liquid LQ.
- the liquid immersion member 514 includes a supply port 529 that can supply the liquid LQ and a recovery port 530 that can recover the liquid LQ.
- the supply port 529 is connected to the liquid supply device 531 via the flow path 531R.
- the liquid supply device 531 can supply clean and temperature-adjusted liquid LQ to the supply port 529.
- the flow path 531R includes a supply flow path formed inside the liquid immersion member 514 and a flow path formed by a supply pipe connecting the supply flow path and the liquid supply device 531.
- the liquid LQ sent from the liquid supply device 531 is supplied to the supply port 529 via the flow path 531R.
- the supply port 529 is disposed at a predetermined position of the liquid immersion member 514 facing the optical path in the vicinity of the optical path. In the present embodiment, the supply port 529 supplies the liquid LQ to the space 532 between the emission surface 22 and the upper surface 528.
- the liquid LQ supplied from the supply port 529 to the space 532 is supplied onto the substrate
- the recovery port 530 can recover the liquid LQ on the substrate P.
- the recovery port 530 is connected to the liquid recovery device 534 via the flow path 534R.
- the liquid recovery device 534 includes a vacuum system and can recover the liquid LQ by sucking it from the recovery port 530.
- the channel 534R includes a recovery channel formed inside the liquid immersion member 514 and a channel formed by a recovery pipe that connects the recovery channel and the liquid recovery device 534.
- the liquid LQ recovered from the recovery port 530 is recovered by the liquid recovery device 534 via the flow path 534R.
- the recovery port 530 is disposed around the optical path of the exposure light EL.
- the recovery port 530 is disposed at a predetermined position of the liquid immersion member 514 that can face the surface of the substrate P.
- the recovery port 530 can recover at least a part of the liquid LQ on the substrate P facing the lower surface 523 of the liquid immersion member 514.
- a porous member 535 is disposed in the collection port 530.
- the porous member 535 is a plate-like member, and includes a plurality of lower surfaces 536 that can face the substrate P, an upper surface 537 that is opposite to the lower surface 536, and a lower surface 536 that is opposite to the upper surface 537. With holes.
- the liquid LQ on the substrate P can flow into the recovery channel 534R through the hole of the porous member 535.
- the liquid recovery device 534 for example, the liquid LQ of the substrate P that has contacted the lower surface 536 of the porous member 535 flows into the recovery flow path 534R and is recovered by the liquid recovery device 534.
- the lower surface 523 of the liquid immersion member 514 includes the lower surface 527 of the plate portion 525 and the lower surface 536 of the porous member 535 that is disposed around the lower surface 527 and can face the substrate P.
- the control device 516 performs the liquid LQ recovery operation using the recovery port 530 in parallel with the liquid LQ supply operation using the supply port 529, thereby making one side
- the immersion space LS can be formed with the liquid LQ between the last optical element 21 and the liquid immersion member 514 and the substrate P (object) on the other side.
- At least the plate portion 525 and the porous member 535 forming the lower surface 523 are made of titanium.
- the predetermined portion of the liquid immersion member 514 that comes into contact with the liquid LQ is made of titanium.
- FIG. 22A is a plan view showing a state where the cleaning tool 1 is held by the substrate holding part 512H
- FIG. 22B is a side sectional view.
- the outer shape of the cleaning tool 501 is substantially the same as the outer shape of the substrate P.
- the substrate holder 512H can hold the cleaning tool 501.
- the substrate holding part 512H holds the lower surface 501B (base member 503) of the cleaning tool 501 in a releasable manner.
- the upper surface 501A of the cleaning tool 501 held by the substrate holding part 512H is substantially the same as the upper surface 512T of the substrate stage 512.
- FIG. 23 is a diagram illustrating an example of the operation of the transport system 515 according to the present embodiment.
- the transport system 515 can transport the cleaning tool 501.
- the conveying member 524 can support the cleaning tool 501.
- the transport member 524 can perform at least one of a loading operation (loading operation) of the cleaning tool 501 with respect to the substrate holding portion 512H and an unloading operation (unloading operation) of the cleaning tool 501 from the substrate holding portion 512H.
- the conveying member 524 supports the base member 503 of the cleaning tool 501.
- the base member 503 is made of ceramics. Since the base member 503 is made of ceramics, the conveyance member 524 supports the base member 503, so that contamination of the conveyance member 524 is suppressed. In addition, even when the substrate P is supported after the base member 503 is supported by the transport member 524, the influence on the substrate P is suppressed.
- control device 516 makes the acceleration when the cleaning tool 501 is transported by the transport member 524 smaller than the acceleration when transporting the substrate P. Thereby, the liquid LC held in the internal space 504 is suppressed from leaking out of, for example, the hole of the porous plate 502 during the conveyance by the conveyance member 524.
- the control device 516 moves the substrate stage 512 to a substrate exchange position away from the projection region PR, and uses the transport system 515 to place the substrate stage 512 disposed at the substrate exchange position.
- the substrate P before exposure is loaded.
- the control device 516 controls the transport system 515 so that the substrate P is transported by the transport member 524 at a predetermined speed and acceleration.
- the measurement stage 513 is disposed in the projection region PR, and the immersion space LS is formed between the terminal optical element 21 and the liquid immersion member 514 and the measurement stage 513. Is formed.
- the control device 516 moves the substrate stage 512 toward the projection region PR.
- the control device 516 performs scram movement, and from the state in which the immersion space LS is formed between the terminal optical element 21 and the liquid immersion member 514 and the measurement stage 513, the terminal optical element 21 and the liquid immersion member 514.
- the substrate stage 512 are changed to a state in which the immersion space LS is formed.
- the immersion space LS is formed so that the optical path of the exposure light EL between the terminal optical element 21 and the immersion member 514 and the substrate P held by the substrate stage 512 is filled with the liquid LQ.
- the exposure apparatus EX of the present embodiment is also a scanning exposure apparatus (a so-called scanning stepper) that projects an image of the pattern of the mask M onto the substrate P while moving the mask M and the substrate P in a predetermined scanning direction synchronously.
- the control device 516 controls the mask stage 11 and the substrate stage 512 to move the mask M and the substrate P in a predetermined scanning direction in the XY plane.
- the scanning direction (synchronous movement direction) of the substrate P is the Y-axis direction
- the scanning direction (synchronous movement direction) of the mask M is also the Y-axis direction.
- the control device 516 moves the substrate P in the Y-axis direction with respect to the projection region PR of the projection optical system PL and synchronizes with the movement of the substrate P in the Y-axis direction in the illumination region IR of the illumination system IL.
- the substrate P is irradiated with the exposure light EL through the projection optical system PL and the liquid LQ in the immersion space LS on the substrate P while moving the mask M in the Y-axis direction. Thereby, the pattern image of the mask M is projected onto the substrate P, and the substrate P is exposed with the exposure light EL.
- the exposed substrate P is unloaded from the substrate stage 512.
- the control device 516 moves the substrate stage 512 to the substrate exchange position in order to unload the exposed substrate P from the substrate stage 512.
- the controller 516 uses the transport system 515 to unload the exposed substrate P from the substrate stage 512 disposed at the substrate replacement position.
- the control device 516 repeats the loading operation of the substrate P before exposure, the exposure operation of the substrate P, and the unloading operation of the substrate P after exposure to sequentially perform immersion exposure on the plurality of substrates P.
- a substance e.g., an organic substance such as a photosensitive material
- a foreign substance contaminant
- not only substances generated from the substrate P but also foreign substances floating in the air may be mixed into the liquid LQ in the immersion space LS.
- the liquid LQ in the immersion space LS contacts the lower surface 523 of the immersion member 514.
- the liquid LQ in the immersion space LS also contacts the upper surface 512T of the substrate stage 512.
- the foreign matter when foreign matter enters the liquid LQ in the immersion space LS, the foreign matter may adhere to the lower surface 523 of the liquid immersion member 514 and the upper surface 512T of the substrate stage 512. If a state in which foreign matter adheres to the liquid contact surface that comes into contact with the liquid LQ of the members in the exposure apparatus EX is left, the foreign matter adheres to the substrate P during exposure or is supplied from the supply port 529.
- the liquid LQ may be contaminated. Further, if the lower surface 523 of the liquid immersion member 514 is contaminated or the upper surface 512T of the substrate stage 512 is contaminated, for example, the liquid immersion space LS may not be formed satisfactorily. As a result, exposure failure may occur.
- a cleaning process for cleaning the members in the exposure apparatus EX using the above-described cleaning tool 501 is executed at a predetermined timing.
- a method of cleaning the members in the exposure apparatus EX using the cleaning tool 501 will be described with reference to the flowchart of FIG. 24 and the schematic diagrams of FIGS. 25A, 25B, 26, and 27.
- a case where the lower surface 523 of the liquid immersion member 514 is cleaned using the cleaning tool 501 will be described as an example.
- the cleaning tool 501 is carried into the exposure apparatus EX (step S501).
- the liquid LC is held in advance in the internal space 504 of the cleaning tool 501 before the cleaning process is executed.
- the cleaning tool 501 carried into the exposure apparatus EX is transported by the transport system 515.
- the control device 516 starts the loading operation of the cleaning tool 501 with respect to the substrate stage 512 using the transport system 515 (step S502).
- the control device 516 moves the substrate stage 512 to the substrate replacement position.
- the transport system 515 supports the base member 503 of the cleaning tool 501 with the transport member 524 and executes the loading operation of the cleaning tool 501 on the substrate stage 512 disposed at the substrate replacement position.
- the substrate stage 512 holds the loaded cleaning tool 501 by the substrate holder 512H.
- the acceleration when the cleaning tool 501 is transported by the transport member 524 is smaller than the acceleration when the substrate P is transported, for example, leakage of the liquid LC in the internal space 504 during transport Is suppressed.
- the measurement stage 513 is disposed at a position facing the terminal optical element 21 and the liquid immersion member 514, and the terminal optical element 21 and the liquid immersion member are arranged. Liquid LQ is held between 514 and measurement stage 513 to form immersion space LS.
- the control device 516 moves the substrate stage 512 toward the projection region PR.
- the control device 516 executes the scram movement, and from the state where the immersion space LS is formed with the liquid LQ between the terminal optical element 21 and the liquid immersion member 514 and the measurement stage 513, the terminal optical element 21 and the liquid
- the state is changed to a state in which the immersion space LS is formed between the immersion member 514 and the cleaning tool 501 on the substrate stage 512. That is, the control device 516 moves the substrate stage 512 and arranges the surface 502A of the cleaning tool 501 held by the substrate holding part 512H at a position facing the terminal optical element 21 and the liquid immersion member 514.
- the liquid LQ is held between the last optical element 21 and the liquid immersion member 514 and the cleaning tool 501 held on the substrate stage 512, and the liquid LQ in the liquid immersion space LS
- the surface 502A of the perforated plate 502 comes into contact (step S503).
- FIG. 26 is a view showing a state in which the surface 502A of the cleaning tool 501 held on the substrate stage 512 is disposed at a position facing the exit surface 22 of the last optical element 21 and the lower surface 523 of the liquid immersion member 514.
- FIG. 6 is a diagram schematically showing the vicinity of a porous plate 502.
- the control device 516 supplies the liquid LQ using the supply port 529. And the recovery operation of the liquid using the recovery port 530 is stopped.
- the size of the hole 502H is optimized.
- the liquid LC in the internal space 504 is on the surface.
- the movement to the 502A side is suppressed.
- the above phenomenon occurs, and a mixed liquid LD of the liquid LQ and the liquid LC is generated on the surface 502A.
- the generated mixed liquid LD is held between the exit surface 22 of the last optical element 21 and the lower surface 523 of the liquid immersion member 514, and the surface 502A of the cleaning tool 501.
- an immersion space is formed with the mixed liquid LD between the lower surface 523 of the liquid immersion member 514 and the surface 502A of the cleaning tool 501.
- the mixed liquid LD since the surface 502A is liquid repellent with respect to the liquid LQ and the liquid LC (that is, the mixed liquid LD), the mixed liquid LD is disposed between the lower surface 523 of the liquid immersion member 514 and the surface 502A of the cleaning tool 501.
- the immersion space is well formed.
- each of the porous plate 502 and the liquid immersion member 514 is made of titanium, and the porous plate 502 and the liquid immersion member 514 are made of the same material.
- the mixed liquid LD is an electrolytic solution
- the porous plate 502 and the material of the liquid immersion member 514 are different, the mixed liquid LD is held between the porous plate 502 and the liquid immersion member 514.
- at least one of the liquid immersion members 514 is likely to corrode.
- the porous plate 502 and the liquid immersion member 514 are the same material, the quality of the porous plate 502 and the liquid immersion member 514 can be maintained.
- the supply operation of the liquid LQ using the supply port 529 and the liquid recovery operation using the recovery port 530 are stopped. A decrease in the ratio of the liquid LC inside can be suppressed.
- the controller 516 moves the substrate stage 512 in the XY directions and moves the cleaning tool 501 relative to the liquid immersion member 514 during cleaning using the mixed liquid LD.
- the wide area of the lower surface 523 of the liquid immersion member 514 and the mixed liquid LD can be brought into contact with each other for cleaning.
- the surface 502A is liquid repellent with respect to the liquid LQ and the liquid LC (that is, the mixed liquid LD)
- the lower surface 523 of the liquid immersion member 514 and the cleaning tool 501 even when the cleaning tool 501 is moved.
- the liquid immersion space of the mixed liquid LD can be satisfactorily formed between the surface 502A of the liquid crystal.
- control device 516 has the substrate stage 512 so that the lower surface 523 of the liquid immersion member 514 and the upper surface 512T of the substrate stage 512 face each other in a state where the immersion space of the mixed liquid LD is formed. To move. Accordingly, at least a part of the upper surface 512T disposed around the upper surface 501A of the cleaning tool 501 can be brought into contact with the mixed liquid LD, and at least a part of the upper surface 512T can be cleaned with the mixed liquid LD.
- control device 516 performs scram movement so that the lower surface 523 of the liquid immersion member 514 and the upper surface 513T of the measurement stage 513 face each other in a state where the liquid immersion space for the mixed liquid LD is formed. . Accordingly, at least a part of the upper surface 513T can be brought into contact with the mixed liquid LD, and at least a part of the upper surface 513T can be cleaned with the mixed liquid LD.
- control device 516 In order to remove the mixed liquid LD from the liquid immersion member 514 after cleaning using the mixed liquid LD and before exposure of the substrate P using the liquid LQ, the control device 516 includes a supply operation of the liquid LQ using the supply port 529. Start the flushing process. Further, the control device 516 starts a liquid recovery operation using the recovery port 530 (step S505).
- the control device 516 performs the liquid supply using the recovery port 530 in parallel with the liquid LQ supply operation using the supply port 529.
- a collection operation is executed.
- the control device 516 can wash away the mixed liquid LD remaining in the upper surface 513T of the measurement stage 513, the lower surface 523 of the liquid immersion member 514, the porous member 535, the supply flow path 531R, the recovery flow path 534R, and the like. it can.
- the control device 516 uses the recovery port 530 in parallel with the supply operation of the liquid LQ using the supply port 529 in a state where the substrate stage 512 is disposed at a position facing the terminal optical element 21 and the liquid immersion member 514. By executing the liquid recovery operation, the mixed liquid LD remaining on the upper surface 512T of the substrate stage 512 or the like can be washed away. Further, the control device 516 uses the recovery port 530 in parallel with the supply operation of the liquid LQ using the supply port 529 in a state where the cleaning tool 501 is disposed at a position facing the terminal optical element 21 and the liquid immersion member 514. By performing the liquid recovery operation, the mixed liquid LD remaining in the cleaning tool 501 or the like can be washed away.
- the types of the liquid LC and the liquid LQ are different.
- the mixed liquid LD liquid LC
- the mixed liquid LD is added to the liquid LQ that fills the optical path during the subsequent exposure of the substrate P. Mixing is suppressed.
- control device 516 stops the supply operation of the liquid LQ using the supply port 529, and sets the recovery port 530 in a state where the cleaning tool 501 is disposed at a position facing the terminal optical element 21 and the liquid immersion member 514.
- a recovery operation of the liquid to be used is executed to recover the liquid on the upper surface 501A of the cleaning tool 501 (step S506).
- the cleaning tool 501 is unloaded from the substrate stage 512.
- the control device 516 moves the substrate stage 512 to the substrate replacement position in order to unload the cleaning tool 501 from the substrate stage 512.
- the controller 516 uses the transport system 515 to unload the cleaning tool 501 from the substrate stage 512 disposed at the substrate replacement position (step S507).
- the cleaning tool 501 unloaded from the substrate stage 512 is unloaded from the exposure apparatus EX (step S508).
- the process of collecting the liquid on the upper surface 501A of the cleaning tool 501 is performed before the cleaning tool 501 is unloaded from the substrate stage 512. During conveyance, leakage, scattering, etc. of the liquid from the cleaning tool 501 are suppressed.
- the substrate P is held by the substrate holding part 512H, and the exposure process for the substrate P is executed.
- the exposed substrate P is subjected to predetermined process processing such as development processing.
- the liquid immersion member 514 and the like in the exposure apparatus EX can be efficiently and satisfactorily cleaned using the cleaning tool 501. Therefore, the occurrence of defective exposure due to contamination of the liquid immersion member 514 and the like can be suppressed, and the generation of defective devices can be suppressed.
- the transport system 515 that can transport the substrate P performs the operation of loading the cleaning tool 501 onto the substrate stage 512 and the operation of unloading from the substrate stage 512.
- a transport system for transporting the cleaning tool 501 that is different from the transport system 515 that can transport the cleaning tool 501 may be provided, and the operation of loading and unloading the cleaning tool 501 may be executed using the transport system.
- an operator may execute an operation of loading the cleaning tool 501 onto the substrate stage 512 and an operation of unloading the cleaning tool 501 from the substrate stage 512.
- the cleaning tool 501 is moved to a position facing the last optical element 21 and the liquid immersion member 514 while maintaining the liquid immersion space LS of the liquid LQ.
- the cleaning tool 501 is moved to a position facing the terminal optical element 21 and the liquid immersion member 514, and then the liquid LQ supply operation and the recovery operation are resumed, and the terminal on one side is resumed.
- a liquid immersion space LS for the liquid LQ may be formed between the optical element 21 and the liquid immersion member 514 and the cleaning tool 501 on the other side.
- the liquid LQ is supplied after the cleaning tool 501 is moved to a position facing the last optical element 21 and the liquid immersion member 514, that is, during the execution of the cleaning operation using the cleaning tool 501.
- the liquid LQ supply operation and the recovery operation may be executed during the cleaning operation.
- the liquid immersion space of the mixed liquid LD is formed on the upper surface 512T of the substrate stage 512, the operation of cleaning the upper surface 512T, and the liquid of the mixed liquid LD on the upper surface 513T of the measurement stage 513
- the operation of cleaning the upper surface 513T is performed by forming the immersion space, at least one of the operation of cleaning the upper surface 512T and the operation of cleaning the upper surface 513T may be omitted.
- FIG. 28 is a side sectional view showing an example of the cleaning tool 601 according to the fourth embodiment
- FIG. 29 is a plan view showing a part of the cleaning tool 601.
- FIG. 29 shows a state where the porous plate 502 is not present.
- the cleaning tool 601 includes a perforated plate 502 and a base member 603 that supports the perforated plate 502. Further, the cleaning tool 601 includes an internal space 504 facing the back surface 502B of the porous plate 502.
- the base member 603 is the same material as the perforated plate 502.
- the base member 603 and the porous plate 502 are made of titanium.
- the perforated plate 502 and the base member 603 are joined.
- the perforated plate 502 and the base member 603 are bonded by a so-called diffusion bonding method.
- the outer surface of the base member 603 is formed of a resin film containing fluorine.
- the outer surface of the base member 603 includes an upper surface 503D of the base member 603 disposed around the surface 502A of the perforated plate 502, a lower surface 503E opposite to the upper surface 503D, and a side surface 503F connecting the upper surface 503D and the lower surface 503E.
- the material for forming the film include PFA (Tetra-fluoro-ethylene-perfluoro-alkyl vinyl ether-copolymer), PTFE (Poly-tetrafluoro-ethylene), PEEK (polyetheretherketone), Teflon (registered trademark), and the like.
- the outer surface of the base member 603 is formed of a resin film containing fluorine, contamination of the transport member 524 is suppressed even when the transport member 524 supports the base member 603. In addition, even when the substrate P is supported after the base member 603 is supported by the transport member 524, the influence on the substrate P is suppressed.
- the internal space 504 is provided with a dividing member 550 that divides the internal space 504 into a plurality of spaces 504P. Before the cleaning process, a cleaning liquid LC is disposed in the space 504P.
- the dividing member 550 is made of the same material as the base member 603. That is, in this embodiment, the dividing member 550 is made of titanium.
- the dividing members 550 are arranged in a lattice form in the XY plane, and the spaces 504P are arranged in a matrix form in the XY plane.
- the division member 550 may be arrange
- the liquid LC in the space 504P can be prevented from leaking outside during the conveyance of the cleaning tool 601.
- the porous member is not disposed in the internal space 504, after the cleaning process (step S504) is completed, the liquid LC is well removed from the internal space 504, for example, in the operations of steps S505 and S506. can do.
- the cleaning target member in the exposure apparatus EX can be efficiently and satisfactorily cleaned using the cleaning tool 501.
- the liquid LC may be supplied from the cleaning liquid supply source (not shown) to the internal space within the exposure apparatus EX. Also in this case, the liquid LC may be supplied from the liquid supply source of the liquid LC to the upper surface of the member in the exposure apparatus (for example, the upper surface 512T of the substrate stage 512), and the upper surface of the member may be cleaned.
- the optical path on the exit side (image plane side) of the terminal optical element 21 of the projection optical system PL is filled with the liquid LQ, but this is disclosed in International Publication No. 2004/019128.
- a projection optical system in which the optical path on the incident side (object plane side) of the last optical element 21 is also filled with the liquid LQ can be employed.
- liquid LQ of each above-mentioned embodiment is water
- liquids other than water may be sufficient.
- hydrofluoroether (HFE), perfluorinated polyether (PFPE), fomblin oil, or the like can be used as the liquid LQ.
- PFPE perfluorinated polyether
- various fluids such as a supercritical fluid can be used as the liquid LQ.
- the substrate P in each of the above embodiments not only a semiconductor wafer for manufacturing a semiconductor device, but also a glass substrate for a display device, a ceramic wafer for a thin film magnetic head, or an original mask or reticle used in an exposure apparatus. (Synthetic quartz, silicon wafer) or the like is applied.
- the exposure apparatus EX may be a step-and-scan type scanning exposure apparatus (scanning stepper) that scans and exposes the pattern of the mask M by synchronously moving the mask M and the substrate P, or the mask M and the substrate.
- a step-and-repeat projection exposure apparatus (stepper) that collectively exposes the pattern of the mask M while keeping P stationary, and sequentially moves the substrate P stepwise may be used.
- the second pattern In a state where the pattern and the substrate P are substantially stationary, a reduced image of the second pattern may be partially overlapped with the first pattern using the projection optical system PL and may be collectively exposed on the substrate P (stitch-type batch). Exposure equipment).
- a stitch type exposure apparatus a step-and-stitch type exposure apparatus in which at least two patterns are partially overlapped and transferred on the substrate P and the substrate P is sequentially moved may be employed.
- the exposure apparatus EX synthesizes the pattern of two masks on the substrate via the projection optical system, and performs the substrate by one scanning exposure.
- An exposure apparatus that double-exposes one upper shot area almost simultaneously may be used.
- the exposure apparatus EX may be a proximity type exposure apparatus or a mirror projection aligner.
- the exposure apparatus EX may not include the measurement stage 13.
- the exposure apparatus EX is a twin-stage type exposure having a plurality of substrate stages as disclosed in US Pat. No. 6,341,007, US Pat. No. 6,208,407, US Pat. No. 6,262,796, and the like. It may be a device.
- a substrate stage for holding a substrate, a reference member on which a reference mark is formed, and / or various photoelectric sensors are mounted, and a substrate to be exposed is mounted.
- the present invention can also be applied to an exposure apparatus that includes a measurement stage that is not held.
- the exposure apparatus EX may be an exposure apparatus that includes a plurality of substrate stages and measurement stages.
- the type of the exposure apparatus EX is not limited to an exposure apparatus for manufacturing a semiconductor element that exposes a semiconductor element pattern on the substrate P, but an exposure apparatus for manufacturing a liquid crystal display element or a display, a thin film magnetic head, an image sensor (CCD). ), An exposure apparatus for manufacturing a micromachine, a MEMS, a DNA chip, a reticle, a mask, or the like.
- each position information of the mask stage 11 and the substrate stage 12 (512) is measured using an interferometer system including a laser interferometer.
- an ArF excimer laser may be used as a light source device that generates ArF excimer laser light as exposure light EL.
- a harmonic generator that outputs pulsed light with a wavelength of 193 nm may be used, including a solid-state laser light source such as a DFB semiconductor laser or a fiber laser, an optical amplification unit having a fiber amplifier, a wavelength conversion unit, and the like.
- each of the illumination areas IR and the projection area PR described above has a rectangular shape. However, other shapes such as an arc shape may be used.
- 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.
- a variable shaped mask also known as an electronic mask, an active mask, or an image generator
- the variable shaping mask includes, for example, a DMD (Digital Micro-mirror Device) which is a kind of non-light emitting image display element (spatial light modulator).
- a pattern forming apparatus including a self-luminous image display element may be provided instead of the variable molding mask including the non-luminous image display element.
- a self-luminous image display element for example, CRT (Cathode Ray Tube), inorganic EL display, organic EL display (OLED: Organic Light Emitting Diode), LED display, LD display, field emission display (FED: Field Emission Display) And plasma display (PDP: Plasma Display Panel).
- the exposure apparatus provided with the projection optical system PL has been described as an example, but an exposure apparatus that does not use the projection optical system PL may be used. Even when the projection optical system PL is not used in this way, the exposure light is irradiated onto the substrate via an optical member such as a lens, and an immersion space is formed in a predetermined space between the optical member and the substrate. It is formed.
- the exposure apparatus EX exposes a line-and-space pattern on the substrate P by forming interference fringes on the substrate P as disclosed in, for example, WO 2001/035168. It may be an apparatus (lithography system).
- the exposure apparatus EX of the present embodiment maintains various mechanical subsystems including the respective constituent elements recited in the claims of the present application so as to maintain predetermined mechanical accuracy, electrical accuracy, and optical accuracy.
- Manufactured by assembling In order to ensure these various accuracies, before and after assembly, various optical systems are adjusted to achieve optical accuracy, various mechanical systems are adjusted to achieve mechanical accuracy, and various electrical systems are Adjustments are made to achieve electrical accuracy.
- the assembly process from various subsystems to the exposure apparatus EX includes mechanical connection, electrical circuit wiring connection, pneumatic circuit piping connection, and the like 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 EX.
- the exposure apparatus EX is preferably manufactured in a clean room in which the temperature, cleanliness, etc. 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, and a substrate which is a base material of the device.
- a substrate including a substrate process (exposure process) including exposing the substrate P with the exposure light EL using a mask pattern and developing the exposed substrate P according to the above-described embodiment. It is manufactured through a processing step 204, a device assembly step (including processing processes such as a dicing process, a bonding process, and a packaging process) 205, an inspection step 206, and the like. The processing using the cleaning tool described above is included in the substrate processing step 204.
Abstract
Description
本願は、2008年3月19日に出願された特願2008-072524号、及び2008年8月26日に出願された特願2008-216525号に基づき優先権を主張し、その内容をここに援用する。
本発明の第7の態様に従えば、露光光で基板を露光する露光装置に搬入され、露光装置内の部材をクリーニングするクリーニング工具であって、ベース部材と、ベース部材上に設けられ、クリーニング液体を保持可能な液体保持部材と、を備えるクリーニング工具が提供される。
本発明の第8の態様に従えば、露光光で基板を露光する露光装置に第7の態様のクリーニング工具を搬入することと、そのクリーニング工具の液体保持部材によって保持されたクリーニング液体によって露光装置内の所定部材の表面をクリーニングすることと、を含むクリーニング方法が提供される。
本発明の第9の態様に従えば、露光光で基板を露光する露光装置に第7の態様のクリーニング工具を搬入することと、そのクリーニング工具の液体保持部材によって保持されたクリーニング液体によって露光装置内の所定部材の表面をクリーニングすることと、クリーニング後に、露光装置で基板を露光することと、露光された基板を現像することと、を含むデバイス製造方法が提供される。
第1実施形態について説明する。図1は、第1実施形態に係るクリーニング工具1の一例を示す斜視図、図2は、側断面図である。後述するように、クリーニング工具1は、露光光ELで基板Pを露光する露光装置EXに搬入され、その露光装置EX内の部材の少なくとも一部をクリーニングする。
次に、第2実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。
次に、第3実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。図18は、第3実施形態に係るクリーニング工具501の一例を示す側断面図、図19は、平面図である。後述するように、クリーニング工具501は、液体LQを介して露光光ELで基板Pを露光する露光装置EXに搬入され、その露光装置EX内の部材、及び/又は部品(以下、クリーニング対象の部材と称する)の少なくとも一部をクリーニングする。
次に、第4実施形態について説明する。以下の説明において、上述の実施形態と同一又は同等の構成部分については同一の符号を付し、その説明を簡略若しくは省略する。
Claims (62)
- 露光光で基板を露光する露光装置に搬入され、前記露光装置内の部材をクリーニングするクリーニング工具であって、
ベース部材と、
前記ベース部材上に配置され、クリーニング液体を染み込ませたクリーニング部材と、を備えるクリーニング工具。 - 前記クリーニング部材は、第1部分と、第2部分とを含む請求項1記載のクリーニング工具。
- 前記第1部分は、前記ベース部材の表面に対して第1高さを有し、
前記第2部分は、前記ベース部材の表面に対して第2高さを有する請求項2記載のクリーニング工具。 - 前記第2部分は、前記ベース部材の表面に対して前記第1部分より高い請求項3記載のクリーニング工具。
- 前記露光装置内の部材の表面の形状に応じて、前記第1高さ及び前記第2高さがそれぞれ定められた請求項3又は4記載のクリーニング工具。
- 前記第2部分は、前記第1部分の周囲の少なくとも一部に配置される請求項2~5のいずれか一項記載のクリーニング工具。
- 前記ベース部材上において、前記第1部分と前記第2部分とが離れている請求項2~6のいずれか一項記載のクリーニング工具。
- 前記クリーニング液体は、前記第1部分に染み込ませた第1クリーニング液体と、前記第2部分に染み込ませた第2クリーニング液体とを含む請求項2~7のいずれか一項記載のクリーニング工具。
- 前記ベース部材上に配置され、前記クリーニング部材の周囲に配置された周壁部材を有する請求項1~8のいずれか一項記載のクリーニング工具。
- 前記周壁部材は、前記クリーニング液体の漏出を抑制する請求項9記載のクリーニング工具。
- 前記周壁部材は、前記クリーニング部材から染み出した前記クリーニング液体を回収する請求項9又は10記載のクリーニング工具。
- 前記周壁部材は、多孔部材を含む請求項9~11のいずれか一項記載のクリーニング工具。
- 前記周壁部材は、スポンジを含む請求項9~12のいずれか一項記載のクリーニング工具。
- 前記周壁部材は、前記ベース部材の表面に対して前記クリーニング部材より低い請求項9~13のいずれか一項記載のクリーニング工具。
- 前記周壁部材は、前記クリーニング部材より前記クリーニング液体に対して親液性である請求項9~14のいずれか一項記載のクリーニング工具。
- 前記ベース部材は、前記基板と実質的に同じ外形を有する請求項1~15のいずれか一項記載のクリーニング工具。
- 前記クリーニング部材は、多孔部材を含む請求項1~16のいずれか一項記載のクリーニング工具。
- 前記クリーニング部材は、スポンジを含む請求項1~17のいずれか一項記載のクリーニング工具。
- 露光光で基板を露光する露光装置に請求項1~18のいずれか一項記載のクリーニング工具を搬入することと、
前記クリーニング工具の前記クリーニング部材と前記露光装置内の部材とを接触させて、前記露光装置内の部材の少なくとも一部をクリーニングすることと、を含むクリーニング方法。 - 前記露光装置内の基板保持部で前記クリーニング工具を保持することと、
前記基板保持部を移動して、前記クリーニング部材と前記露光装置内の部材の表面とを接触させることと、を含む請求項19記載のクリーニング方法。 - 前記クリーニング部材をほぼ静止させた状態で前記露光装置内の部材をクリーニングする請求項20記載のクリーニング方法。
- 前記露光装置は、露光用液体を介して基板を露光する液浸露光装置であって、
前記クリーニング工具を用いるクリーニング後、前記基板の露光前に、前記露光装置内の部材の表面から前記クリーニング液体を除去するために、前記露光用液体を供給することを含む請求項19~21のいずれか一項記載のクリーニング方法。 - 前記露光装置は、露光用液体を介して基板を露光する液浸露光装置であって、
前記露光装置内の部材の表面は、前記基板の露光中に、前記基板との間で前記露光用液体を保持する保持面と、前記保持面の周囲の少なくとも一部に配置された液体回収面との少なくとも一方を含む請求項19~22のいずれか一項記載のクリーニング方法。 - 前記露光装置内の部材の表面は、前記露光光が射出される光学部材の射出面を含む請求項19~23のいずれか一項記載のクリーニング方法。
- 露光光で基板を露光する露光装置に請求項1~18のいずれか一項記載のクリーニング工具を搬入することと、
前記クリーニング工具の前記クリーニング部材と前記露光装置内の部材とを接触させて、前記露光装置内の部材の少なくとも一部をクリーニングすることと、
前記クリーニング後に、前記露光装置で基板を露光することと、
露光された前記基板を現像することと、を含むデバイス製造方法。 - 前記クリーニング後に、前記基板を基板保持部に保持することと、
前記クリーニング前に、前記クリーニング工具を前記基板保持部に保持することと、をさらに含む請求項25記載のデバイス製造方法。 - 第1液体を介して露光光で基板を露光する露光装置に搬入され、前記露光装置内の所定部材をクリーニングするためのクリーニング工具であって、
第1面、前記第1面の反対側の第2面、及び前記第1面と前記第2面とを連通する複数の孔を有する多孔板と、
前記多孔板を支持するベース部材と、
前記第2面に面する内部空間と、を備え、
前記内部空間に、クリーニング用の第2液体が保持されるクリーニング工具。 - 前記第2液体は、前記第1液体に対して可溶性である請求項26記載のクリーニング工具。
- 前記第1面は、前記第1,第2液体に対して撥液性である請求項28記載のクリーニング工具。
- 前記多孔板は、前記所定部材と同じ材質である請求項27~29のいずれか一項記載のクリーニング工具。
- 前記多孔板は、前記第2面の周縁領域に複数配置され、前記第2面から突出する第1凸部と、前記第1凸部のそれぞれから前記第2面の中心に対する放射方向外側に突出する第2凸部とを有し、
前記ベース部材は、前記第2凸部が配置される凹部を有する請求項27~30のいずれか一項記載のクリーニング工具。 - 前記ベース部材は、セラミックス製である請求項27~31のいずれか一項記載のクリーニング工具。
- 前記ベース部材は、前記多孔板と同じ材質である請求項27~32のいずれか一項記載のクリーニング工具。
- 前記ベース部材の外面は、フッ素を含む樹脂の膜で形成される請求項33記載のクリーニング工具。
- 前記内部空間に配置され、複数の開気孔を有する多孔部材を備える請求項27~34のいずれか一項記載のクリーニング工具。
- 前記多孔部材は、前記所定部材と同じ材質である請求項35記載のクリーニング工具。
- 前記内部空間に配置され、該内部空間を複数の空間に分割する分割部材を有する請求項27~34のいずれか一項記載のクリーニング工具。
- 前記分割部材は、前記ベース部材と同じ材質である請求項37記載のクリーニング工具。
- 前記基板と実質的に同じ外形を有する請求項27~38のいずれか一項記載のクリーニング工具。
- 第1液体を介して露光光で基板を露光する露光装置に請求項26~39のいずれか一項記載のクリーニング工具を搬入することと、
前記第1液体と前記第1面とを接触させ、前記第1面上に生成された前記第1液体と前記第2液体との混合液体で、前記露光装置内の所定部材の表面をクリーニングすることと、を含むクリーニング方法。 - 前記クリーニング工具の第1面は、前記露光装置内の物体の表面と対向する位置に配置され、
前記第1面と前記物体の表面との間で前記混合液体を保持する請求項40記載のクリーニング方法。 - 前記多孔板は、前記物体と同じ材質である請求項41記載のクリーニング方法。
- 前記所定部材の表面は、前記物体の表面を含む請求項41又は42記載のクリーニング方法。
- 前記所定部材の表面は、前記第1面の周囲の少なくとも一部に配置される請求項41~43のいずれか一項記載のクリーニング方法。
- 前記混合液体を用いるクリーニング時に、前記物体と前記クリーニング工具とを相対的に移動する請求項41~44のいずれか一項記載のクリーニング方法。
- 前記露光光の照射位置に移動可能であり、前記基板をリリース可能に保持する可動部材で前記クリーニング工具を保持することを含み、
前記可動部材を移動して、前記クリーニング工具の第1面を、前記物体の表面と対向する位置に配置する請求項41~45のいずれか一項記載のクリーニング方法。 - 搬送部材で前記クリーニング工具を支持して前記可動部材に対する搬入動作及び前記可動部材からの搬出動作の少なくとも一方を実行することを含み、
前記搬送部材は、前記クリーニング工具のベース部材を支持する請求項40~46のいずれか一項記載のクリーニング方法。 - 前記搬送部材は、前記基板を支持して前記可動部材に対する搬入動作及び前記可動部材からの搬出動作の少なくとも一方を実行可能である請求項47記載のクリーニング方法。
- 前記搬送部材で前記クリーニング工具を搬送するときの加速度は、前記基板を搬送するときの加速度より小さい請求項48記載のクリーニング方法。
- 前記混合液体を用いるクリーニング後、前記基板の露光前に、前記所定部材から前記混合液体を除去するために、前記第1液体を供給することを含む請求項40~49のいずれか一項記載のクリーニング方法。
- 前記混合液体を用いるクリーニング後、前記第1面上の液体を回収することを含む請求項40~50のいずれか一項記載のクリーニング方法。
- 前記回収後、前記露光装置から前記クリーニング工具を搬出することを含む請求項51記載のクリーニング方法。
- 前記所定部材の表面は、前記基板の露光中に、前記第1液体と接触する請求項40~52のいずれか一項記載のクリーニング方法。
- 前記所定部材の表面は、前記基板の露光中に、前記基板に入射する露光光の光路が第1液体で満たされるように、前記基板の表面との間で前記第1液体を保持する請求項40~53のいずれか一項記載のクリーニング方法。
- 第1液体を介して露光光で基板を露光する露光装置に請求項27~39のいずれか一項記載のクリーニング工具を搬入することと、
前記第1液体と前記第1面とを接触させ、前記第1面上に生成された前記第1液体と前記第2液体との混合液体で、前記露光装置内の所定部材の少なくとも一部をクリーニングすることと、
前記クリーニング後に、前記露光装置で基板を露光することと、
露光された前記基板を現像することと、を含むデバイス製造方法。 - 前記クリーニング後に、前記露光光の照射位置に移動可能な可動部材で前記基板を保持することと、
前記クリーニング前に、前記クリーニング工具を前記可動部材に保持することと、を含む請求項55記載のデバイス製造方法。 - 露光光で基板を露光する露光装置に搬入され、前記露光装置内の部材をクリーニングするクリーニング工具であって、
ベース部材と、
前記ベース部材上に設けられ、クリーニング液体を保持可能な液体保持部材と、を備えるクリーニング工具。 - 前記液体保持部材は、多孔部材を含む請求項57記載のクリーニング工具。
- 前記液体保持部材は、前記クリーニング液体を保持する内部空間を形成する請求項57又は58記載の露光クリーニング工具。
- 前記液体保持部材に前記クリーニング液体を染みこませることによって、前記液体保持部材に前記クリーニング液体が保持される請求項57又は58記載のクリーニング工具。
- 露光光で基板を露光する露光装置に請求項57~60のいずれか一項記載のクリーニング工具を搬入することと、
前記クリーニング工具の前記液体保持部材によって保持された前記クリーニング液体によって前記露光装置内の所定部材の表面をクリーニングすることと、を含むクリーニング方法。 - 露光光で基板を露光する露光装置に請求項57~60のいずれか一項記載のクリーニング工具を搬入することと、
前記クリーニング工具の前記液体保持部材によって保持された前記クリーニング液体によって前記露光装置内の所定部材の表面をクリーニングすることと、
前記クリーニング後に、前記露光装置で基板を露光することと、
露光された前記基板を現像することと、を含むデバイス製造方法。
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- 2009-03-18 US US12/382,544 patent/US20100039628A1/en not_active Abandoned
- 2009-03-19 TW TW098108851A patent/TW200946252A/zh unknown
- 2009-03-19 JP JP2010503926A patent/JP5152321B2/ja not_active Expired - Fee Related
- 2009-03-19 WO PCT/JP2009/055431 patent/WO2009116625A1/ja active Application Filing
- 2009-03-19 KR KR1020107017436A patent/KR20100128278A/ko not_active Application Discontinuation
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JP2013251580A (ja) * | 2009-12-09 | 2013-12-12 | Asml Netherlands Bv | リソグラフィ装置およびデバイス製造方法 |
JP2011129914A (ja) * | 2009-12-18 | 2011-06-30 | Asml Netherlands Bv | リソグラフィ装置及びデバイス製造方法 |
US8659742B2 (en) | 2009-12-18 | 2014-02-25 | Asml Netherlands B.V. | Lithographic apparatus and a device manufacturing method |
WO2012018051A1 (ja) * | 2010-08-04 | 2012-02-09 | 株式会社ニコン | クリーニング方法、デバイス製造方法、クリーニング基板、液浸部材、液浸露光装置、及びダミー基板 |
TWI742169B (zh) * | 2017-06-29 | 2021-10-11 | 台灣積體電路製造股份有限公司 | 半導體裝置之量測方法及量測操作方法 |
US11656391B2 (en) | 2017-06-29 | 2023-05-23 | Taiwan Semiconductor Manufacturing Co., Ltd. | Aperture design and methods thereof |
Also Published As
Publication number | Publication date |
---|---|
JPWO2009116625A1 (ja) | 2011-07-21 |
US20100039628A1 (en) | 2010-02-18 |
KR20100128278A (ko) | 2010-12-07 |
TW200946252A (en) | 2009-11-16 |
JP5152321B2 (ja) | 2013-02-27 |
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