WO2006046562A1 - 基板処理方法、露光装置及びデバイス製造方法 - Google Patents
基板処理方法、露光装置及びデバイス製造方法 Download PDFInfo
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- WO2006046562A1 WO2006046562A1 PCT/JP2005/019604 JP2005019604W WO2006046562A1 WO 2006046562 A1 WO2006046562 A1 WO 2006046562A1 JP 2005019604 W JP2005019604 W JP 2005019604W WO 2006046562 A1 WO2006046562 A1 WO 2006046562A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- liquid
- processing method
- immersion
- exposure
- Prior art date
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Classifications
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- 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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70216—Mask projection systems
- G03F7/70341—Details of immersion lithography aspects, e.g. exposure media or control of immersion liquid supply
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—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
Definitions
- the present invention relates to a substrate processing method, an exposure apparatus, and a device manufacturing method including a step of exposing a substrate.
- an exposure apparatus that projects and exposes a pattern formed on a mask onto a photosensitive substrate is used. It is done.
- This exposure apparatus includes a mask stage that supports a mask and a substrate stage that supports a substrate, and projects and exposes a mask pattern onto a substrate via a projection optical system while sequentially moving the mask stage and the substrate stage.
- miniaturization of patterns formed on a substrate is required in order to increase the density of devices. In order to meet this demand, it is desired to further increase the resolution of the exposure apparatus.
- a liquid immersion space is formed by filling a space between the projection optical system and the substrate, and the liquid immersion is performed.
- An immersion exposure apparatus has been devised that performs an exposure process through the liquid in the region.
- Patent Document 1 Pamphlet of International Publication No. 99Z49504
- an adhesion mark (so-called watermark) may be formed on the substrate. Since the adhesion trace acts as a foreign matter, inconveniences such as pattern defects occur when various process processes including a development process are performed on the substrate in a state where the adhesion trace is formed on the substrate. In addition, if the substrate is carried out in a state where an adhesion mark is formed on the substrate, there are problems such as contamination of the transport system for unloading the substrate and contamination of the carrier for housing the substrate.
- the present invention has been made in view of such circumstances, and it is possible to obtain a foreign matter adhering to the substrate ( It is an object of the present invention to provide a substrate processing method, an exposure apparatus, and a device manufacturing method using the exposure apparatus that can suppress the occurrence of inconvenience due to a liquid adhesion mark or the like.
- the present invention employs the following configurations corresponding to FIGS. 1 to 19 shown in the embodiments.
- the reference numerals in parentheses attached to each element are merely examples of the element and do not limit each element.
- a substrate processing method comprising:
- An immersion region (LR) of the first liquid (LQ1) is formed on the substrate (P), and the substrate (P) is irradiated with exposure light (EL) through the first liquid (LQ1).
- a substrate processing method comprising: an exposure step of exposing P); and an immersion step of immersing the substrate (P) in a second liquid (LQ2) before the exposure step.
- the substrate is immersed in the second liquid before the exposure light is irradiated onto the substrate through the first liquid (before the exposure process).
- immersing the substrate in the second liquid in the dipping process is an operation different from contacting the substrate with the first liquid for the immersion exposure in the exposure process.
- a substrate processing method wherein the substrate (P) is irradiated with exposure light (EL) on the substrate (P) via the first liquid (LQ1).
- EL exposure light
- a substrate processing method including a cleaning step of cleaning the substrate (P) after contacting the first liquid (LQ1) with the second liquid (LQ2).
- the substrate that has been in contact with the first liquid is washed with the second liquid, whereby the eluate eluted from the substrate into the first liquid.
- This makes it possible to reduce or remove foreign substances (such as liquid adhesion traces) adhering to the substrate. Therefore, it is possible to suppress the occurrence of inconvenience due to such foreign matter.
- a substrate processing method in which a substrate (P) is held by a holder (PH), and exposure light is applied to the substrate via a first liquid (LQ1). Exposing the substrate (P) by irradiating the substrate and the second substrate (P) while holding the exposed substrate (P) in the holder (PH). And a cleaning process for cleaning with a liquid (LQ2).
- the substrate after contacting the first liquid is washed with the second liquid while being held by the substrate holder, thereby reducing or removing the foreign matter adhering to the substrate. be able to . Therefore, it is possible to suppress the occurrence of inconvenience due to such foreign matter.
- a device including the substrate processing method according to the first aspect, a step of developing the substrate after the exposure step, and a step of processing the developed substrate.
- a manufacturing method is provided.
- a device manufacturing method including the substrate processing method according to the second or third aspect, a step of developing the substrate, and a step of processing the developed substrate. Is provided.
- the substrate can be processed while suppressing the occurrence of inconvenience due to foreign matters (such as liquid adhesion traces), so that the desired performance can be achieved. Can be manufactured.
- the liquid immersion region (LR) of the first liquid (LQ1) is formed on the substrate (P), and the substrate (P An exposure apparatus that exposes a substrate (P) by irradiating exposure light (EL) onto (P), via a substrate holder (PH) that holds the substrate (P) and a first liquid (LQ1)
- An exposure apparatus (EX-SYS) including an immersion apparatus (30) for immersing the substrate (P) in a second liquid (LQ2) before exposing the substrate (P) is provided.
- the immersion apparatus immerses the substrate in the second liquid.
- foreign substances such as liquid adhesion traces
- the liquid immersion region (LR) of the first liquid (LQ1) is formed on the substrate (P), and the substrate (P (P) is an exposure apparatus that irradiates the substrate (P) with exposure light (EL) and exposes the substrate (PQ) due to the eluate eluted from the substrate (P) into the first liquid (LQ1).
- P) A cleaning device (100, 100) that cleans the substrate (P) after contact with the first liquid (L Q1) with the second liquid (LQ2) in order to reduce or remove foreign matter adhering to the surface. 30) etc.) is provided.
- the substrate after contact with the first liquid is removed by the second cleaning device.
- the second cleaning device By washing with this liquid, it is possible to downsize or remove foreign matters (such as liquid adhesion traces) adhering to the substrate due to the eluate eluted from the substrate into the first liquid. Therefore, it is possible to suppress the occurrence of inconvenience due to such foreign matters.
- the substrate can be processed while suppressing the occurrence of inconvenience due to foreign matters (such as liquid adhesion traces) adhering to the substrate. Can be manufactured.
- a predetermined process can be satisfactorily performed on a substrate, and a device having desired performance can be manufactured.
- FIG. 1 is a view showing a device manufacturing system including an exposure apparatus according to a first embodiment.
- FIG. 2 is a schematic block diagram that shows an exposure apparatus main body.
- FIG. 3 is a flowchart showing an example of the operation of the device manufacturing system.
- FIG. 4 is a side sectional view showing an example of a substrate.
- FIG. 5 is a diagram showing an example of an immersion apparatus.
- FIG. 6 is a schematic diagram showing the behavior of a substrate subjected to immersion treatment.
- FIG. 7 is a diagram showing an example of an operation for removing liquid.
- FIG. 8 is a diagram showing an example of a temperature adjustment mechanism.
- FIG. 9 is a diagram showing another example of the temperature adjustment mechanism.
- FIG. 10 is a diagram showing a state where the substrate held by the substrate holder is subjected to immersion exposure.
- FIG. 11 is a schematic diagram showing a state in which exposure light is irradiated on the substrate.
- FIG. 12 is a schematic diagram showing the behavior of a substrate subjected to heat treatment.
- FIG. 13 is a flowchart showing an example of the operation of the device manufacturing system according to the second embodiment.
- FIG. 14 is a plan view showing an example of an operation for cleaning a substrate.
- FIG. 15 is a side sectional view showing an example of an operation for cleaning a substrate.
- FIG. 16 is a diagram showing an example of an operation for cleaning a substrate according to the third embodiment.
- FIG. 17 is a side sectional view showing an example of a substrate according to a third embodiment.
- FIG. 18 is a schematic diagram showing the behavior of a substrate subjected to immersion treatment.
- FIG. 19 is a flowchart showing an example of a microdevice manufacturing process.
- FIG. 1 is a diagram showing an embodiment of a device manufacturing system including an exposure apparatus according to the first embodiment.
- the device manufacturing system SYS includes an exposure apparatus EX—S YS, a coater / developer apparatus CZD—SYS, and a transport system H that transports a substrate P.
- the exposure apparatus EX-SYS has an interface part IF that forms a connection with the coater / developer apparatus CZD-SYS and an immersion area LR of the first liquid LQ1 formed on the substrate P, and passes through the first liquid LQ1. It is equipped with an exposure device body EX that exposes the substrate P by irradiating the substrate P with exposure light EL, and a controller CONT that controls the overall operation of the exposure device EX-SYS.
- the coater / developers device CZD-SYS is a coating device (not shown) for applying a photosensitive material (resist) to the base material of the substrate P before the exposure processing, and after the exposure processing in the exposure device body EX.
- a coater 'developer body CZD including a developing device (not shown) for developing the substrate P is provided.
- the exposure apparatus body EX is arranged inside the first chamber apparatus CH1 in which the cleanliness is controlled.
- including coating and developing devices The coater 'developer body CZD is arranged inside the second chamber device CH2 different from the first chamber device CH1.
- the first chamber apparatus CH1 that accommodates the exposure apparatus main body EX and the second chamber apparatus CH2 that accommodates the coater / developer bar main body CZD are connected via an interface IF.
- the transport system H transports the substrate P between the interface unit IF and the exposure apparatus main body EX, and transports the substrate P between the first transport system HI and the interface unit IF and the coater 'developer main body CZD. And a second transport system H2.
- the first transport system HI forms part of the exposure apparatus EX-SYS
- the second transport system H2 forms part of the coater / developer apparatus CZD-SYS.
- the first transfer system HI is provided in the first chamber apparatus CH1
- the second transfer system H2 is provided in the second chamber apparatus CH2.
- an immersion device 30 for immersing the substrate P in the second liquid LQ2 and a temperature adjustment mechanism 40 for adjusting the temperature of the substrate P are provided.
- the dipping device 30 and the temperature adjustment mechanism 40 are provided in the coater / developers device CZD-SYS.
- the dipping device 30 and the temperature adjustment mechanism 40 are provided in the second chamber device CH2 in the middle of the transport path of the second transport system H2.
- the first transport system HI carries (loads) the substrate P before the exposure processing into the substrate stage PST of the exposure apparatus main body EX, and transfers the substrate P after the exposure processing to the exposure apparatus main body EX. It has the function of unloading from the substrate stage PST.
- the substrate P which has been coated with the photosensitive material by the coating device of the coater / developer body CZD, is subjected to a predetermined treatment by the dipping device 30 and the temperature adjustment mechanism 40, and is then interfaced by the second transport system H2. Passed to the first transport system HI via the part IF.
- an opening and a shirter for opening and closing the opening are provided in the part facing the interface part IF of each of the first and second chamber devices CH1 and CH2.
- the shatter is opened during the transfer operation to the interface part IF of the board P.
- the first transport system HI loads the substrate P before exposure processing onto the substrate stage PST of the exposure apparatus body EX.
- the substrate P after the exposure processing is unloaded from the substrate stage PST by the first transport system HI.
- the first transport system HI passes the unloaded substrate P to the second transport system H2 of the coater / developer apparatus CZD-SYS via the interface unit IF.
- the second transport system H2 coats the substrate P after the exposure process.
- the developer body is transported to the developer unit of CZD. Coater 'Developer body
- the development device of CZD performs development processing on the delivered substrate P.
- FIG. 2 is a schematic block diagram that shows the exposure apparatus body EX.
- the exposure apparatus body EX has a mask stage MST that can move while holding the mask M and a substrate holder PH that holds the substrate P, and a substrate stage that can move the substrate holder PH that holds the substrate P.
- Illumination optical system IL that illuminates PST and mask M held by mask stage MST with exposure light EL, and projection optical system that projects the pattern image of mask M illuminated with exposure light EL onto substrate P It is equipped with PL.
- the exposure apparatus main body EX of the present embodiment is an immersion exposure apparatus to which an immersion method is applied in order to improve the resolution by substantially shortening the exposure wavelength and substantially increase the depth of focus.
- a liquid immersion mechanism 100 is provided for filling the optical path space of the exposure light EL on the image plane side of the projection optical system PL with the first liquid LQ1.
- the immersion mechanism 100 is provided in the vicinity of the image plane side of the projection optical system PL.
- the nozzle member 70 includes a supply port 12 for supplying the first liquid LQ1 and a recovery port 22 for recovering the first liquid LQ1, and the nozzle member 70.
- the liquid supply mechanism 10 that supplies the first liquid LQ1 to the image plane side of the projection optical system PL via the supply port 12 provided in the nozzle, and the projection optical system PL via the recovery port 22 provided in the nozzle member 70.
- a liquid recovery mechanism 20 that recovers the first liquid LQ1 on the image plane side.
- the nozzle member 70 surrounds the first optical element LSI closest to the image plane of the projection optical system PL among the plurality of optical elements constituting the projection optical system PL above the substrate P (substrate stage PST). Formed in a ring!
- the exposure apparatus main body EX has the substrate P including the projection area AR of the projection optical system PL by the first liquid LQ1 supplied from the liquid supply mechanism 10 at least while the pattern image of the mask M is projected onto the substrate P.
- a local liquid immersion method is adopted in which the liquid immersion area LR of the first liquid LQ1 that is larger than the projection area AR and smaller than the substrate P is locally formed.
- the exposure apparatus main body EX is located between the lower surface LSA of the first optical element LSI closest to the image plane of the projection optical system PL and the upper surface of the substrate P disposed on the image plane side of the projection optical system PL.
- the controller CONT supplies a predetermined amount of the first liquid LQ1 onto the substrate P using the liquid supply mechanism 10, and collects a predetermined amount of the first liquid LQ1 on the substrate P using the liquid recovery mechanism 20.
- a liquid immersion region LR of the first liquid LQ1 is locally formed on the substrate P.
- the exposure apparatus main body EX is a scanning type that exposes the pattern formed on the mask M onto the substrate P while synchronously moving the mask M and the substrate P in mutually different directions (reverse directions) in the scanning direction.
- a case where an exposure apparatus (so-called scanning stepper) is used will be described as an example.
- the synchronous movement direction (scanning direction) of the mask M and the substrate P in the horizontal plane is the X-axis direction
- the direction orthogonal to the X-axis direction in the horizontal plane is the Y-axis direction (non-scanning direction).
- the direction perpendicular to the axis and Y-axis direction and coincident with the optical axis AX of the projection optical system PL is defined as the Z-axis direction.
- the rotation (inclination) directions around the X, Y, and Z axes are the 0 X, 0 Y, and ⁇ ⁇ directions, respectively.
- the illumination optical system IL includes an exposure light source, an optical integrator that equalizes the illuminance of a light beam emitted from the exposure light source, a condenser lens that collects exposure light EL from the optical integrator, a relay lens system, and an exposure. It has a field stop that sets the illumination area on the mask ⁇ ⁇ ⁇ with light EL. The predetermined illumination area on the mask ⁇ is illuminated with the exposure light EL having a uniform illuminance distribution by the illumination optical system IL.
- Illumination optical system IL force Emission exposure light EL includes, for example, emission lines emitted from mercury lamps (g-line, h-line, i-line) and far ultraviolet light (DUV) such as KrF excimer laser light (wavelength 248 nm) Light), vacuum ultraviolet light (VUV light) such as ArF excimer laser light (wavelength 193 nm) and F laser light (wavelength 157 nm)
- pure water is used as the first liquid LQ1 that forms the immersion region LR.
- Pure water includes not only ArF excimer laser light but also far ultraviolet light (DUV light) such as bright lines (g-line, h-line, i-line) and KrF excimer laser light (wavelength 248 nm) that emit mercury lamp force. It can be transmitted.
- DUV light far ultraviolet light
- bright lines g-line, h-line, i-line
- KrF excimer laser light wavelength 248 nm
- the mask stage MST is movable while holding the mask M.
- Mask stage MST Holds the mask M by vacuum suction (or electrostatic suction).
- the mask stage MST is in a plane perpendicular to the optical axis AX of the projection optical system PL with the mask M held by the drive of the mask stage drive device MST D including the linear motor controlled by the control device CONT. That is, it can move two-dimensionally in the XY plane and can rotate slightly in the ⁇ Z direction.
- a movable mirror 91 that moves together with the mask stage MST is fixed on the mask stage MST.
- a laser interferometer 92 is provided at a position facing the moving mirror 91.
- the position of the mask M on the mask stage MST in the two-dimensional direction and the rotation angle in the ⁇ Z direction are measured in real time by the laser interferometer 92.
- the measurement result of the laser interferometer 92 is output to the control device CONT.
- the control device CONT drives the mask stage driving device MSTD based on the measurement result of the laser interferometer 92, and controls the position of the mask M held by the mask stage MST!
- Projection optical system PL projects an image of the pattern of mask M onto substrate ⁇ at a predetermined projection magnification ⁇ .
- Projection optical system PL includes a plurality of optical elements, and these optical elements are held by lens barrel PK.
- the projection optical system PL is a reduction system whose projection magnification j8 is 1Z4, 1/5, or 1Z8, for example.
- the projection optical system PL may be a unity magnification system or an enlargement system.
- the projection optical system PL may be any of a refractive system, a reflective system, and a catadioptric system.
- the first optical element LSI closest to the image plane of the projection optical system PL among the plurality of optical elements constituting the projection optical system PL is exposed from the lens barrel PK.
- the substrate stage PST has a substrate holder PH that holds the substrate P, and is movable on the base member BP on the image plane side of the projection optical system PL.
- the substrate holder PH holds the substrate P by vacuum suction, for example.
- a recess 96 is provided on the substrate stage PST, and a substrate holder PH for holding the substrate P is disposed in the recess 96.
- the upper surface 97 of the substrate stage PST other than the recess 96 is a flat surface (flat portion) that is almost the same height (flat) as the upper surface of the substrate P held by the substrate holder PH! /
- the substrate stage PST is XY on the base member BP in a state where the substrate P is held via the substrate holder PH by driving the substrate stage driving device PSTD including a linear motor controlled by the control device CONT. 2D movement in a plane and slight rotation in ⁇ Z direction Is possible. Furthermore, the substrate stage PST can also be moved in the Z-axis direction, the 0 X direction, and the ⁇ Y direction. Therefore, the upper surface of the substrate P supported by the substrate stage PST can move in directions of six degrees of freedom in the X axis, Y axis, Z axis, 0 X, ⁇ Y, and ⁇ Z directions.
- a movable mirror 93 that moves together with the substrate stage PST is fixed to the side surface of the substrate stage PST.
- a laser interferometer 94 is provided at a position facing the movable mirror 93. The position and rotation angle of the substrate P on the substrate stage PST in two dimensions are measured by the laser interferometer 94 in real time.
- the exposure apparatus EX is an oblique incidence that detects surface position information of the upper surface of the substrate P supported by the substrate stage PST as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-37149! Provide a focus / leveling detection system (not shown).
- the focus leveling detection system detects surface position information of the upper surface of the substrate P (position information in the Z-axis direction and inclination information of the substrate P in the ⁇ X and ⁇ Y directions).
- a system using a capacitive sensor may be adopted.
- the measurement result of the laser interferometer 94 is output to the control device CONT.
- the detection result of the focus leveling detection system is also output to the control device CONT.
- the control device CONT drives the substrate stage drive device PSTD based on the detection result of the focus / repelling detection system, and controls the focus position (Z position) and tilt angle ( ⁇ X, ⁇ ⁇ ) of the substrate P.
- the upper surface of the substrate P is aligned with the image plane of the projection optical system PL, and the position control of the substrate P in the X-axis direction, the Y-axis direction, and the ⁇ Z direction is performed based on the measurement result of the laser interferometer 94.
- the liquid supply mechanism 10 supplies the first liquid LQ1 to the image plane side of the projection optical system PL.
- the liquid supply mechanism 10 includes a liquid supply unit 11 that can deliver the first liquid LQ1, and a supply pipe 13 that connects one end of the liquid supply unit 11 to the liquid supply unit 11. The other end of the supply pipe 13 is connected to the nozzle member 70. Inside the nozzle member 70, an internal flow path (supply flow path) that connects the other end of the supply pipe 13 and the supply port 12 is formed.
- the liquid supply unit 11 includes a tank for storing the first liquid LQ1, a pressure pump, a filter unit for removing foreign matter in the first liquid LQ1, and the like. The liquid supply operation of the liquid supply unit 11 is controlled by the control device CONT.
- the tank, pressurization pump, filter unit, etc. of the liquid supply mechanism 10 are all equipped with the exposure apparatus body EX. These facilities may be substituted.
- the liquid recovery mechanism 20 recovers the first liquid LQ1 on the image plane side of the projection optical system PL.
- the liquid recovery mechanism 20 includes a liquid recovery part 21 that can recover the first liquid LQ1, and a recovery pipe 23 that connects one end of the liquid recovery part 21 to the liquid recovery part 21.
- the other end of the recovery pipe 23 is connected to the nozzle member 70.
- Inside the nozzle member 70 an internal flow path (recovery flow path) that connects the other end of the recovery pipe 23 and the recovery port 22 is formed.
- the liquid recovery unit 21 includes, for example, a vacuum system (suction device) such as a vacuum pump, a gas-liquid separator that separates the recovered first liquid LQ1 and gas, and a tank that stores the recovered first liquid LQ1. Yes.
- the vacuum system, gas-liquid separator, tank, etc. of the liquid recovery mechanism 20 are not necessarily equipped with the exposure apparatus main body EX. May be.
- the supply port 12 for supplying the first liquid LQ1 and the recovery port 22 for recovering the first liquid LQ1 are formed on the lower surface 70A of the nozzle member 70.
- the lower surface 70A of the nozzle member 70 is provided at a position facing the upper surface of the substrate P and the upper surface 97 of the substrate stage PST.
- the nozzle member 70 is an annular member provided so as to surround the side surface of the first optical element LSI
- the supply port 12 is provided on the lower surface 70A of the nozzle member 70 on the first optical element LSI (projection) of the projection optical system PL.
- a plurality of shadow optical systems PL are provided so as to surround the optical axis AX).
- the recovery port 22 is provided on the lower surface 70A of the nozzle member 70 so as to be separated from the supply port 12 to the outside of the first optical element LSI so as to surround the first optical element LSI and the supply port 12. Is provided.
- the control device CONT supplies a predetermined amount of the first liquid LQ1 onto the substrate P using the liquid supply mechanism 10, and uses the liquid recovery mechanism 20 to supply a predetermined amount of the first liquid LQ1 on the substrate P.
- the control device CONT drives each of the liquid supply unit 11 and the liquid recovery unit 21.
- the liquid recovery unit 21 is driven under the control device CONT, the first liquid LQ1 on the image plane side of the projection optical system PL is nominated through the recovery port 22. Flow into the recovery flow path of the fluid member 70, flow through the recovery pipe 23, and then recovered into the liquid recovery section 21.
- a coating process for coating a photosensitive material on a substrate including a silicon wafer (semiconductor wafer) is performed (step Sl).
- a light-sensitive material is applied onto the substrate by a predetermined application method such as a spin coat method.
- a predetermined pretreatment is performed on the base material before applying the photosensitive material on the base material.
- Pre-processing includes cleaning to remove foreign matter on the substrate, drying to dry the cleaned substrate, and surface modification to improve the adhesion between the substrate and the photosensitive material.
- the surface modification treatment include a treatment of applying hexamethyldisilazane (HMDS) or the like on a substrate.
- an antireflection film bottom ARC (Anti-Reflective Coating)
- FIG. 4 is a view showing an example of the substrate P after the coating process is performed in the coater / developer body CZD.
- a substrate P has a base material 1 and a photosensitive material 2 coated on a part of the upper surface 1A of the base material 1.
- the base material 1 includes, for example, silicon wafer.
- the photosensitive material 2 is coated with a predetermined thickness (for example, about 200 nm) in a region that occupies most of the central portion of the upper surface 1A of the substrate 1.
- the photosensitive material 2 is not coated on the peripheral edge lAs of the upper surface 1A of the base material 1, and the base material 1 is exposed at the peripheral edge lAs of the upper surface 1A.
- the photosensitive material 2 is not coated on the side surface 1C or the lower surface (back surface) 1B of the substrate 1.
- a chemically amplified resist is used as the photosensitive material 2.
- the photosensitive material 2 When the photosensitive material 2 is provided on the substrate 1 by a predetermined coating method such as a spin coating method, the photosensitive material 2 is also applied to the peripheral portion of the substrate 1. This part comes into contact with a carrier shelf (substrate support part) in which the substrate P is stored if the transfer arm of the transfer system that transfers the substrate P is used. Due to this mechanical contact, the photosensitive material 2 at the peripheral edge of the substrate 1 may be peeled off. When the photosensitive material 2 is peeled off, it becomes a foreign substance, and if the transfer arm or carrier is contaminated, the contaminated material is cleaned by force. Contact with a clean substrate P again may increase the contamination.
- a carrier shelf substrate support part
- a phenomenon may occur in which the photosensitive material 2 is provided in a large amount so that the photosensitive material 2 rises from the central portion at the peripheral edge of the base material 1.
- the photosensitive material 2 at the peripheral edge of the base material 1 is easily peeled off, and the peeled photosensitive material 2 becomes a foreign material. If the foreign material adheres to the substrate P, the pattern transfer accuracy is affected. Therefore, after the photosensitive material 2 is provided on the substrate 1 by a predetermined coating method, before the exposure process is performed, the photosensitive material 2 on the peripheral edge lAs is removed using, for example, a solvent (so-called edge rinse). Done. As a result, the photosensitive material 2 is removed at the periphery of the substrate 1 (substrate P), and the substrate 1 is exposed at the periphery 1 As as shown in FIG.
- a heat treatment is performed on the substrate P (step S2).
- the solvent remaining in the photosensitive material 2 is volatilized by the pre-beta.
- an immersion process is performed in which the substrate P is immersed in the second liquid LQ2 (step S3).
- the immersion treatment is performed by the immersion device 30 provided in the coater / developer device CZD-SYS.
- the immersing device 30 immerses the substrate P in the second liquid LQ2 under predetermined immersing conditions determined in advance based on information on the substrate P.
- FIG. 5 is a view showing the dipping device 30.
- the immersion device 30 is the bottom surface of the substrate P.
- Holder 31 that holds the central portion of (the lower surface 1B of the base material 1), a shaft 33 that is connected to the holder 31, a rotation mechanism 32 that rotates the holder 31 that holds the substrate P via the shaft 33, and liquid scattering
- the second liquid LQ2 is supplied onto the substrate P via the ring-shaped member 34 provided so as to surround the periphery of the substrate P held by the holder 31 and the supply port 35A of the supply member 35.
- a liquid supply unit 36 The holder P is loaded with the pre-beta-treated substrate P by the second transport system H2.
- the upper surface of the holder 31 is provided with a vacuum suction hole that constitutes a part of the vacuum device, and the holder 31 sucks and holds the central portion of the lower surface of the substrate P.
- the rotating mechanism 32 includes an actuator such as a motor, and rotates the substrate P held by the holder 31 by rotating the shaft 33 connected to the holder 31.
- the rotation mechanism 32 rotates the holder 31 holding the substrate P at a predetermined number of rotations per unit time in the 0Z direction in the figure.
- the supply member 35 is disposed above the substrate P held by the holder 31 and has a supply port 35A for supplying the second liquid LQ2.
- the second liquid LQ2 is supplied to the upper surface of the substrate P from above the substrate P through the supply port 35A of the supply member 35.
- the supply member 35 is movable in the X axis, Y axis, Z axis, ⁇ , 0 Y, and 0 Z directions by a drive mechanism (not shown). That is, the supply member 35 can move relative to the substrate P held by the holder 31.
- the immersion apparatus 30 can immerse the entire surface of the substrate P with the second liquid LQ2 by moving the supply member 35 relative to the substrate P. Further, the immersion device 30 moves the supply member 35 relative to the substrate P, thereby supplying the second liquid LQ2 to the substrate P, the distance between the supply port 35A and the substrate P, etc.
- the liquid supply unit 36 can supply the second liquid LQ2 onto the substrate P via the supply port 35A of the supply member 35 continuously or intermittently.
- the liquid supply unit 36 can adjust the temperature of the second liquid LQ2 to be supplied, the amount of the second liquid LQ2 to be supplied per unit time (including the flow rate and flow velocity), and the like.
- the relative movement between the supply member 35 and the substrate P is not limited to the movement of the supply member 35, and the substrate P may be powered, or both of them may be moved.
- the dipping device 30 supplies the second liquid LQ2 to the substrate P held by the holder 31 from the supply port 35A of the supply member 35, and immerses the substrate P in the second liquid LQ2.
- the photosensitive material 2 coated on the upper surface 1A of the base material 1 is sufficiently immersed in the second liquid LQ2 supplied from the supply member 35.
- the dipping device 30 rotates the substrate P held by the holder 31 by the rotation mechanism 32 with respect to the substrate P held by the holder 31 while rotating in the ⁇ Z direction in the figure.
- the second liquid LQ2 is continuously supplied from the supply member 35 while the supply member 35 is relatively moved in the X-axis direction.
- the immersion device 30 can immerse almost the entire surface of the photosensitive material 2 with the second liquid LQ2.
- the ring-shaped member 34 is provided around the substrate P held by the holder 31, the ring-shaped member 34 can prevent the second liquid LQ2 from scattering due to the rotation of the substrate P. it can.
- the second liquid LQ2 used for the immersion process is the same as the first liquid LQ 1 for forming the immersion area LR formed on the substrate P for the immersion exposure process. It is a thing. That is, in the present embodiment, the second liquid LQ2 is the same as the first liquid LQ1. It is pure water controlled at a certain purity (cleanliness) and a predetermined temperature. Of course, the second liquid LQ2 may be different from the first liquid LQ1 as long as the substance that elutes when the substrate P is immersed in the first liquid LQ1 can be eluted in advance. For example, ozone water can be used as the second liquid LQ2.
- FIG. 6 is a schematic view showing a state where the photosensitive material 2 of the substrate P is immersed in the second liquid LQ2.
- the photosensitive material 2 of the present embodiment is a chemically amplified resist
- the chemically amplified resist is a base resin and a photoacid generator (PAG: Phot 0) contained in the base resin. Acid Generator), and an amine-based substance called Quenchiaichi.
- PAG Namine-based substances are eluted into the liquid.
- predetermined substances among substances contained in the photosensitive material 2, substances that may be eluted into liquids (LQ1, LQ2) (PAG Namine-based substances, etc.) are appropriately referred to as “predetermined substances”.
- the photosensitive material 2 is immersed in the second liquid LQ2, and it is conceivable that a predetermined substance such as a PAG Namine-based substance is eluted from the photosensitive material 2 into the second liquid LQ2.
- a predetermined substance such as a PAG Namine-based substance
- the upper surface force of the photosensitive material 2 has a predetermined thickness (for example, about 5 to 10 nm) in the first region 2U (such as PAG Nyamin-based material).
- the predetermined substance existing in the second region 2S below it hardly elutes in the second liquid LQ2.
- the first region 2U force is eluted to the second liquid LQ2.
- a predetermined time for example, several seconds to several tens of seconds
- the predetermined substance existing in the first region 2U of the photosensitive material 2 is almost completely eluted, and the photosensitive material
- the specified substance is hardly eluted from 2 into the second liquid LQ2.
- the predetermined time varies depending on the photosensitive material 2.
- the substrate P after being immersed in the second liquid LQ2 for a predetermined time
- the second liquid LQ2 on the substrate P is removed.
- Step S4 the dipping device 30 stops the supply of the second liquid LQ2 by the liquid supply unit 36, or gradually decreases the supply amount, while holding the substrate P 31 Is rotated by rotating mechanism 32.
- the immersion device 30 uses the rotation mechanism 32 to rotate the substrate P at a predetermined number of rotations per unit time, thereby causing the second liquid LQ2 adhering to the substrate P to be scattered from the substrate P by the action of centrifugal force. Remove. That is, in the present embodiment, the dipping device 30 also has a function as a liquid removal mechanism for removing the second liquid LQ2.
- the immersion conditions for immersing the substrate P are set according to information on the substrate P.
- the immersion conditions include the immersion time in which the substrate P is immersed in the second liquid LQ2, that is, the second liquid LQ2 is brought into contact with the substrate P in step S3, and then the second liquid LQ2 is applied from above the substrate P in step S4. Time to remove is included.
- information on the substrate P includes information on the photosensitive material 2.
- the information on the photosensitive material 2 includes information on the forming material forming the photosensitive material 2 and the elution time of a part of the predetermined substance of the photosensitive material 2 into the second liquid LQ2.
- the forming material for forming the photosensitive material 2 includes the above-mentioned base resin, PAG, amine-based substances and the like.
- the time (elution time) from contact between photosensitive material 2 and second liquid LQ2 until almost all of the specified substance is eluted from photosensitive material 2 (first region 2U of photosensitive material 2) is the same as photosensitive material 2. It varies depending on the physical properties of the forming material to be formed and the content of specified substances such as PAG.
- the time (elution time) from when the photosensitive material 2 is brought into contact with the second liquid LQ2 to when elution of the predetermined substance is started also varies depending on the photosensitive material 2.
- the above-mentioned predetermined substance is transferred from the photosensitive material 2 (first region 2U) to the second. Almost all can be eluted in liquid LQ2.
- the immersion conditions also include the removal conditions for the second liquid LQ2.
- the removal conditions of the second liquid LQ2 include the number of rotations (rotational speed) of the substrate P by the rotation mechanism 32 per unit time, the rotation acceleration, and the time during which the substrate P is being rotated (rotation time). .
- the removal condition of the second liquid LQ2 includes a rotation speed profile, a rotation acceleration profile, and the like of the rotation mechanism 32.
- the time that the second liquid LQ2 is in contact with the substrate P! / And the behavior of the second liquid LQ2 on the substrate P (ie, the immersion time) The movement speed etc. will change.
- the above-mentioned predetermined substance is almost completely eluted in the photosensitive liquid 2 (first region 2U) force second liquid LQ2. be able to.
- examples of the immersion conditions include the temperature of the second liquid LQ2 to be supplied. Further, in the case of supplying the second liquid LQ2 to the substrate P from the supply port 35A of the supply member 35 as in the present embodiment, as the immersion condition, per unit time of the supplied second liquid LQ2 (Including the flow rate and flow velocity), the supply pressure when supplying the second liquid LQ2, and the direction in which the second liquid LQ2 flows through the substrate P.
- the dipping device 30 can also use the possibility that the base material 1 is immersed in the liquid (LQ1, LQ2) and information on the material (substance) forming the base material 1 as information on the substrate P.
- the immersion device 30 supplies the second liquid LQ2 onto the substrate P while rotating the substrate P.
- the substrate P photosensitive material 2
- the substrate P can be immersed in the second liquid LQ2.
- the liquid tank may be filled with the second liquid LQ2, and the substrate P may be immersed in the second liquid LQ2 in the liquid tank.
- the substrate P may be immersed in the second liquid LQ2 by supplying the second liquid LQ2 so as to be sprayed onto the substrate P.
- the soaking conditions include the pressure at which the second liquid LQ2 is sprayed. The soaking conditions are also set according to the information about the substrate P.
- the blowing members 37 and 38 having the blowout ports 37A and 38A for blowing out the gas are used as the substrate. It may be arranged on the upper side and the lower side of P! /.
- the liquid removing mechanism 39 removes the second liquid LQ2 adhering to the substrate P by the force of the gas blown from the blowing members 37 and 38.
- the pressure of the gas blown from the outlets 37A and 38A and the gas supply rate (flow rate) per unit time should be the immersion conditions (removal conditions). You can also.
- the temperature adjustment mechanism 40 controls the temperature of the substrate P. (Step S5).
- the temperature adjustment mechanism 40 adjusts the temperature of the substrate P in order to compensate for the temperature change of the substrate P caused by the heat of vaporization when the second liquid LQ2 is removed.
- the temperature adjustment of the substrate P is performed so as to be substantially the same as the temperature of the substrate holder PH and the temperature of Z or the first liquid LQ.
- the temperature of the substrate P By adjusting the temperature of the substrate P so that the temperature is substantially the same as that of the substrate holder PH, the expansion and contraction of the substrate P due to the temperature change of the substrate P when the substrate P is loaded on the substrate holder PH can be suppressed.
- FIG. 8 is a diagram showing the temperature adjustment mechanism 40.
- the temperature adjustment mechanism 40 includes a holder 41 for holding the substrate P, a temperature regulator 42 including a heating device and a cooling device provided inside the holder 41, and a substrate P held by the holder 41.
- a temperature sensor 43 for measuring the temperature and a temperature control device 44 for adjusting the temperature of the holder 41 holding the substrate P via the temperature regulator 42 based on the measurement result of the temperature sensor 43 are provided.
- the substrate P subjected to the immersion treatment is loaded by the second transport system H2.
- the temperature control device 44 of the temperature adjustment mechanism 40 adjusts the temperature of the holder 41 via the temperature controller 42 based on the measurement result of the temperature sensor 43 while holding the substrate P in the holder 41.
- the substrate P held by the holder 41 can be adjusted to a desired temperature.
- the temperature adjustment mechanism 40 includes a storage chamber 45 that can store the substrate P, and a temperature regulator 46 that adjusts the temperature inside the storage chamber 45. May be. And the board
- the holder 31 of the immersion apparatus 30 described with reference to FIG. 5 may be provided with a temperature adjustment function capable of adjusting the temperature of the held substrate P.
- the second liquid on the substrate P After removing the body LQ2, the temperature of the substrate P may be adjusted using the holder 31 of the dipping device 30.
- the immersion device 30 includes information on the second liquid LQ2 including the physical properties and removal conditions of the second liquid LQ2 to be used, and the substrate P caused by the heat of vaporization when the second liquid LQ2 is removed.
- the relationship with temperature change is stored in advance.
- the relationship can be obtained in advance by, for example, experiments or simulations.
- the dipping device 30 is configured so that the substrate P caused by the heat of vaporization when removing the second liquid LQ2 is based on the stored relationship and the removal conditions when the removal process of the second liquid LQ2 is executed. Temperature changes can be predicted. Then, the immersion apparatus 30 adjusts the temperature of the substrate P before removing the second liquid LQ2 from the substrate P based on the predicted result, and the temperature of the substrate P after removing the second liquid LQ2. Can be set to a desired value.
- the immersion apparatus 30 can set the temperature of the substrate P higher than a desired value in consideration of the temperature decrease of the substrate P due to the heat of vaporization when the second liquid LQ2 is removed.
- the temperature of the substrate P is adjusted before being placed on the holder 31 of the immersion apparatus 30 to compensate for the temperature of the substrate P caused by the heat of vaporization when the second liquid LQ2 is removed by the immersion apparatus 30. Also good.
- the second transport system H2 unloads the substrate P from the temperature adjustment mechanism 40 and passes through the interface unit IF to the first transport system HI of the exposure apparatus EX-SYS. hand over.
- the first transport system HI transports (loads) the substrate P to the substrate holder PH of the exposure apparatus main body EX (step S6).
- the control device CONT of the exposure apparatus EX—SYS uses the immersion mechanism 100 to form the immersion region LR of the first liquid LQ1 on the substrate P held by the substrate holder PH. Then, the control device CONT irradiates the substrate P with the exposure light EL via the first liquid LQ 1 onto the substrate P held by the substrate holder PH, thereby performing immersion exposure on the substrate P (step S7).
- FIG. 10 is a diagram showing a state where the substrate P held by the substrate holder PH of the substrate stage PST is subjected to immersion exposure.
- the substrate stage PST has a recess 96, and a substrate holder PH for holding the substrate P is provided inside the recess 96.
- substrate The holder PH includes a base member 80 having a bottom surface 80B facing the lower surface of the substrate P (the lower surface 1B of the base material 1) by a predetermined distance, and an upper surface formed on the base member 80 and facing the lower surface of the substrate P.
- a peripheral wall portion 81 having 81A and a support portion 82 formed on a bottom surface 80B inside the peripheral wall portion 81 are provided.
- the peripheral wall portion 81 is formed in a substantially annular shape according to the shape of the substrate P.
- the upper surface 81A of the peripheral wall 81 is formed so as to face the peripheral edge of the lower surface of the substrate P. Further, the upper surface 81A of the peripheral wall portion 81 is a flat surface.
- a plurality of support portions 82 of the substrate holder PH are uniformly provided inside the peripheral wall portion 81.
- the support portion 82 includes a plurality of support pins, and the substrate holder PH has a so-called pin chuck mechanism.
- the pin chuck mechanism of the substrate holder PH is equipped with a suction mechanism including a suction port 84 that makes the space 83 surrounded by the base member 80 of the substrate holder PH, the peripheral wall 81, and the substrate P negative pressure.
- the substrate P is sucked and held by the support portion 83 by making 83 a negative pressure.
- a plurality of suction ports 84 are provided uniformly on the bottom surface 80B of the base member 80.
- the distance between the side surface of the substrate P held by the substrate holder PH (side surface 1C of the base material 1) and the inner surface 96A of the recess 96 of the substrate stage PST provided around the substrate P is 0. 1 to 1.
- a gap A having a distance of about Omm is formed.
- the upper surface 81A of the peripheral wall portion 81 is a flat surface, and the upper surface 81A is coated with a liquid repellent material such as a fluorine-based resin material and has liquid repellency. Yes.
- a predetermined gap B is formed between the upper surface 81 A of the peripheral wall portion 81 and the lower surface of the substrate P.
- the substrate P before irradiating the exposure light EL onto the substrate P via the first liquid LQ1, the substrate P is immersed in the second liquid LQ2 in step S3. Even when the first liquid LQ1 is again brought into contact with the photosensitive material 2 immersed in the second liquid LQ2, the predetermined substance (PAG or the like) hardly elutes from the photosensitive material 2 to the first liquid LQ1.
- the predetermined substance PAG or the like
- the exposure light EL irradiated to the photosensitive material 2 of the substrate P It can pass through the region 2U and reach the second region 2S where the PAG exists.
- the control device CONT stops the supply of the first liquid LQ1 by the liquid supply mechanism 10 and continues to drive the liquid recovery mechanism 20, Collect and remove the first liquid LQ1 on the substrate stage PST.
- the control device CO NT unloads the substrate P substrate holder PH force using the first transfer system HI.
- the exposed substrate P unloaded from the substrate holder PH is subjected to a heat treatment (post beta) called PEB (Post Exposure Bake) (step S8).
- PEB Post Exposure Bake
- acid is also generated by the PAG force upon exposure to exposure light EL.
- post-beta on the chemically amplified resist after being irradiated with the exposure light EL
- alkali solubility is developed in a region corresponding to the exposure light EL irradiation region (pattern of the mask M).
- the post-beta of the substrate P can be performed by using a temperature adjustment mechanism 40 provided in the coater / developer device CD-SYS as described with reference to FIGS. 8 and 9, for example.
- the exposed substrate P is unloaded from the substrate holder PH by the first transport system HI and then passed to the second transport system H2 through the interface unit IF.
- the second transport system H2 loads the substrate P onto the holder part 41 of the temperature adjustment mechanism 40.
- the temperature adjustment mechanism 40 performs post-beta on the substrate P loaded on the holder 41.
- the temperature adjustment mechanism 40 performs both the temperature adjustment of the substrate P after the liquid removal by the liquid removal mechanism and the post-beta treatment after the substrate P is exposed. It goes without saying that each force may be a separate temperature adjustment mechanism.
- FIG. 12 is a diagram schematically showing the behavior of the photosensitive material 2 on which post-beta (PEB) is performed. Due to the immersion treatment performed in step S3, there is almost no PAG in the first region 2U of the photosensitive material 2. Therefore, after exposing the exposure light EL to the photosensitive material 2, the first region 2U of the photosensitive material 2 is exposed. The acid caused by PAG is hardly generated. On the other hand, since the PAG is sufficiently present in the second region 2S of the photosensitive material 2, the acid is sufficiently generated from the PAG in the second region 2S by irradiation with the exposure light EL. When post-baking is performed on the substrate P including the photosensitive material 2 in such a state, as shown in FIG.
- PEB post-beta
- the phenomenon that the acid in the second region 2S diffuses into the first region 2U occurs. That is, after exposure, almost no acid is present in the first region 2U, but by performing post-beta, the acid present in the second region 2S is supplemented in the first region 2U. Further, by continuing the post beta in a state where the acid is supplemented to the first region 2U, alkali is applied to the region corresponding to the irradiation region of the exposure light EL (pattern of the mask M) in the photosensitive material 2. Solubility can be expressed.
- the substrate P subjected to the post-beta is applied to the coater 'develop by the second transport system H2. It is transported to the main body CZD and developed (step S9).
- the substrate P is immersed in the second liquid LQ2 before irradiating the exposure light EL onto the substrate P via the first liquid LQ1, so that the substrate P is immersed in the immersion exposure.
- a predetermined substance such as PAG elutes in the first liquid LQ1 and the first liquid LQ1 is contaminated and the contaminated first liquid LQ1 is dried, an adhesion trace (water) caused by the predetermined substance on the substrate P (water) Mark) may be formed.
- the predetermined substance from the substrate P hardly dissolves in the first liquid LQ1 in the immersion region LR, even if the first liquid LQ1 remaining on the substrate P dries, there is an adhesion trace on the substrate P. The occurrence of inconveniences that are formed can be suppressed.
- the nozzle member 70 in contact with the first liquid LQ1, the first optical element LS1, the upper surface 97 of the substrate stage PST, It is provided on the upper surface 97 of the substrate holder PH and the substrate stage PST, so that it is possible to prevent contamination of the optical measurement unit, etc., and to perform exposure processing and measurement processing with high accuracy.
- step S3 a predetermined substance such as PAG is eluted in the second liquid LQ2 in which the substrate P is immersed, and the second liquid LQ2 is contaminated by the predetermined substance.
- step 4 since the second liquid LQ2 is removed from the substrate P, it is possible to prevent the generation of foreign matter (adhering matter) on the substrate P. Also, if the second liquid LQ2 contaminated by the clean second liquid LQ2 is washed away and then the substrate P is removed, it is assumed that the droplets of the second liquid LQ2 remain on the substrate P. However, since the concentration of contaminants (eluting substances) in the second liquid LQ2 has decreased, even if the remaining second liquid LQ2 dries, foreign matter (adhered matter) is generated on the substrate P. Can be suppressed.
- the immersion apparatus 30 has a configuration provided in the coater / developer apparatus CZD-SYS, but may of course be provided in the exposure apparatus EX-SYS.
- the immersion device 30 is placed in the middle of the transport path of the first transport system HI constituting the exposure apparatus EX-SYS. May be provided. Thereby, in the exposure apparatus EX-SYS, the substrate P before the immersion exposure process can be immersed in the second liquid LQ2.
- the immersion device 30 may be provided in the interface part IF.
- the temperature adjustment mechanism 40 can be provided in the exposure apparatus EX-SYS.
- the temperature adjustment mechanism 40 is used to adjust the temperature of the substrate P in order to compensate for the temperature change of the substrate P caused by the heat of vaporization when the second liquid LQ2 is removed. It can be carried out.
- the temperature adjustment mechanism 40 can also be provided in the middle of the transfer path of the first transfer system HI, like the immersion device 30.
- the temperature adjustment mechanism 40 may be provided in the interface part IF.
- the temperature adjustment mechanism 40 be installed near the immersion device 30 (liquid removal mechanism) !, the immersion device 30 is placed in the coater 'developer device CZD-SYS, and the temperature is adjusted.
- the adjustment mechanism 40 may be placed in the exposure system EX—SYS!
- the temperature adjustment after the immersion treatment can be omitted.
- the immersion device 30 is provided in the middle of the transport path of the transport system H (H1, H2), and the substrate P is held before the substrate P is held by the substrate holder PH.
- the immersion mechanism 100 has a function as an immersion device, and after holding the substrate P in the substrate holder PH, the substrate P is immersed in the first liquid LQ1. May be. That is, after the substrate P is loaded and held on the substrate holder PH, before the liquid immersion exposure of the substrate P is started, the first liquid LQ1 is supplied onto the substrate P from the supply port 12 of the nozzle member 70. In addition, a step of immersing the substrate P with the supplied first liquid LQ1 may be provided.
- the control device CONT supplies and collects the first liquid LQ1 via the supply port 12 and the recovery port 22 of the nozzle member 70, while also supplying the substrate P held by the substrate holder PH to the nozzle member 70.
- the controller CONT uses the liquid recovery mechanism 20 to recover (remove) the first liquid LQ1 from the substrate P, and after the removal of the first liquid LQ1 is completed, Using the mechanism 100, the immersion area LR of the first liquid LQ1 is again formed on the substrate P, and the substrate P is exposed through the first liquid LQ1.
- the immersion conditions it is desirable to optimize the immersion conditions based on the information about the substrate P even when the immersion process using the liquid immersion mechanism 100 is performed.
- the supply amount and the recovered amount per unit time of the first liquid LQ 1 by the immersion mechanism 100 are determined based on the first liquid during the immersion exposure. It is better to increase the supply amount and recovery amount per unit time of LQ1.
- the flow rate of the first liquid LQ1 on the substrate P during the immersion treatment can be made faster than the flow rate of the first liquid LQ1 on the substrate P during the immersion exposure.
- the object of the present invention can also be achieved by supplying the liquid onto the substrate P and starting the immersion exposure after a sufficient time has elapsed for the predetermined substance to elute from the substrate P. .
- the liquid contains a predetermined dissolved substance, it is desirable to perform the liquid purification or collection operation while maintaining the liquid immersion area.
- the first liquid L Q1 (and / or the second liquid LQ2) recovered by the liquid recovery mechanism 20 may be returned to the liquid supply mechanism 10.
- discard all the first liquid LQ1 (or second liquid LQ2) recovered by the liquid recovery mechanism 20 may be supplied from the liquid supply mechanism 10.
- the structure of the liquid immersion mechanism 1 such as the nozzle member 70 is not limited to the above-described structure.
- European Patent Publication No. 1420298, International Publication No. 2004Z05 5803, International Publication No. 2004Z057589, International Publication Those described in 2004/057590 and WO 2005Z029559 can also be used.
- the second liquid LQ2 different from the first liquid LQ1 can be used.
- a liquid removal mechanism that removes the liquid remaining on the substrate P carried out of the substrate holder PH is disposed.
- the generation of foreign matter (adhered matter) on the substrate P can be more effectively prevented.
- the gas outlets 37A and 38A may be arranged near the periphery of the substrate P so that only the liquid remaining near the periphery of the substrate P by the rotation of the substrate P may be removed.
- the substrate P is immersed in the second liquid LQ before the exposure step so that almost all of the predetermined substance is eluted from the substrate P into the second liquid LQ2.
- the elution of the predetermined substance into the first liquid LQ1 is allowed if a small amount is allowed, it is not necessary to elute the predetermined substance from the substrate P into the second liquid LQ2.
- a characteristic part of the second embodiment is that a cleaning process is performed on the substrate P after the immersion exposure.
- the substrate P is exposed to the substrate P before the immersion exposure.
- description will be made on the assumption that the immersion treatment has not been performed, it is needless to say that the substrate P that has been subjected to the immersion treatment may be subjected to immersion exposure and then subjected to a cleaning treatment as described below. That is, in the exposure apparatus and the exposure method of this embodiment, the immersion apparatus and the immersion process are not essential.
- an immersion exposure process is performed on the substrate P while the substrate P is held on the substrate holder PH (step S7).
- a cleaning process for cleaning the substrate P is performed while the substrate P is held by the substrate holder PH (step S7.1).
- the control device CONT supplies and collects the first liquid LQ1 by the liquid immersion mechanism 100, and holds the first liquid LQ1 on the image plane side of the projection optical system PL while holding the first liquid LQ1 on the substrate member with respect to the nozzle member 70.
- the substrate P held at PH is moved relative to each other, and the substrate P is cleaned using the first liquid LQ1.
- the predetermined substance is eluted from the substrate P, particularly the photosensitive material thereof, into the first liquid LQ1 in the immersion region LR, and is eluted into the first liquid LQ1.
- the controller CONT uses the first liquid LQ1 to wash the substrate P after it has contacted the first liquid LQ1 that forms the immersion area LR.
- foreign substances adhering to the substrate P can be reduced in size (decomposed, atomized, miniaturized) or removed. Therefore, it is possible to prevent the inconvenience that adhesion marks are formed on the substrate P.
- the foreign matter adhering to the substrate P due to the predetermined substance (eluting substance) eluted in the first liquid LQ1 is the photosensitive material such as the PAG Nyamine-based substance as described in the first embodiment. It means the “predetermined substance” itself containing the component and the substance produced by alteration, combination or decomposition of such “predetermined substance”. Such a substance can be identified by detecting the PAG namine-based substance itself or a functional group peculiar to those compounds by an analysis method such as infrared spectroscopic analysis or TOF-SIMS analysis.
- FIG. 14 is a plan view schematically showing a state where the substrate P is being cleaned.
- the control device CONT moves from the supply port 12 of the nozzle member 70 while relatively moving the nozzle member 70 and the substrate P held by the substrate holder PH in the XY direction. While supplying the first liquid LQ1, the first liquid LQ1 is recovered from the recovery port 22. In this way, almost the entire upper surface of the substrate P can be cleaned well.
- the control device CONT uses the first liquid LQ1 supplied from the supply port 12 of the nozzle member 70. Then, the peripheral edge 1 As of the substrate P held by the substrate holder PH is intensively cleaned.
- FIG. 15 is a cross-sectional view showing a state where the peripheral portion 1 As of the substrate P is being cleaned.
- the controller CONT forms an immersion region LR of the first liquid LQ1 on the peripheral portion lAs of the substrate P.
- the nozzle member 70 and the substrate stage PST are moved relative to each other, and as shown by an arrow y3 in FIG. 14, the immersion region LR of the first liquid LQ1 is formed in a peripheral portion lAs ( Move along gap A). Note that the movement of the liquid immersion region LR along the arrow y3 is not limited to one time (one round), and can be executed any number of times (multiple rounds).
- the substrate 1 is often more lyophilic with respect to the first liquid LQ1 than the photosensitive material 2, the first liquid LQ1 used for the immersion exposure is less The possibility of remaining on the peripheral edge lAs that is the exposed part of the material 1 or on the side surface 1C increases. In addition, there is a high possibility that the first liquid LQ1 remaining on the peripheral edge lAs is dried and foreign matter adheres to the peripheral edge lAs of the substrate 1 or an adhesion mark is formed. Therefore, after the immersion exposure, the peripheral edge 1 As of the base material 1 is intensively washed to prevent inconvenience of foreign matters adhering to the peripheral edge lAs of the substrate P, thereby forming an adhesion trace. Inconvenience can be prevented.
- the foreign matter can be reduced in size or removed.
- by moving the immersion area LR of the first liquid LQ1 along the gap A it is possible to prevent foreign matter from adhering to the side surface of the substrate P (side surface 1C of the base material 1). Even if foreign matter is attached, the attached foreign matter can be reduced in size or removed.
- the controller CONT uses the liquid recovery mechanism 20 to perform the first liquid LQ1 used for the cleaning process. Are recovered and removed (step S7.2).
- the control device CONT unloads the substrate P that has been subjected to the cleaning process using the first transport system HI. Since the substrate P is cleaned on the substrate holder PH, contamination of the first transport system HI when the substrate P is unloaded is suppressed. Then, as in the above-described embodiment, the substrate P is subjected to post baking (step S8) and development processing (step S9).
- the substrate P is cleaned using the body LQ1. Therefore, the foreign matter (attachment) attached to the substrate P can be removed or downsized. Also, even if droplets of the first liquid LQ1 remain on the substrate P after the cleaning process, the contaminants (eluting substances) in the first liquid LQ1 remain on the substrate P by the cleaning process. Since the concentration is lowered, even if the remaining first liquid LQ1 is dried, it is possible to prevent (control) the generation of foreign matters (adhered matter) on the substrate P.
- the substrate P is unloaded from the substrate stage PST (substrate holder PH) to the substrate storage container, contamination of the substrate storage container can be prevented.
- the peripheral portion of the substrate P is mainly washed, so that contamination of the transport system and the substrate storage container that supports the peripheral portion of the substrate P can be effectively prevented. Is possible.
- the second liquid LQ2 different from the first liquid LQ1 may be used for the cleaning process in the second embodiment.
- the first liquid LQ1 may be recovered, and the liquid immersion mechanism 100 may be used to supply and recover the second liquid LQ2.
- the second liquid LQ2 can use a liquid containing a component having a cleaning action, and a component having a cleaning action on the same type of liquid as the first liquid, for example, a surfactant, a water-soluble organic solvent. You can also prepare the second liquid by adding it.
- the characteristic part of the third embodiment is that after the substrate P that has been subjected to immersion exposure is unloaded from the substrate holder PH, the substrate P is washed with the second liquid LQ2. Also in this embodiment, the second liquid LQ2 for the cleaning process and the first liquid LQ1 for the immersion exposure process are the same.
- FIG. 16 is a schematic diagram showing a cleaning device 50 for cleaning the substrate P after it is unloaded from the substrate holder PH.
- the cleaning device 50 is provided in the middle of the second transfer system H2 of the coater / developer device CZD-SYS, and cleans the upper surface of the substrate P and the lower surface of the substrate P (the lower surface 1B of the base material 1). It can be purified.
- the cleaning device 50 is disposed above the substrate P, and is disposed below the substrate P, the first supply member 51 having a supply port 51A for supplying the second liquid LQ2 to the upper surface of the substrate P, And a second supply member 52 having a supply port 52A for supplying the two liquid LQ2 to the lower surface of the substrate P.
- the substrate P is held by a holder portion (not shown), and the first and second supply members 51 and 52 and the substrate P are relatively movable.
- the substrate P By supplying the second liquid LQ2 from the first and second supply parts 51 and 52 to the substrate P while relatively moving the first and second supply members 51 and 52 and the substrate P, The upper surface (including the peripheral portion), the lower surface, and the side surfaces of the substrate P can be cleaned with the second liquid LQ2. In addition, clean the substrate P by supplying the second liquid LQ2 while rotating the substrate P.
- the second liquid LQ2 adhering to the substrate P can be obtained by spraying a gas onto the substrate P after the cleaning process, for example, from the blowing members 37 and 38 as shown in FIG. Can be removed. Further, when cleaning the substrate P, the supply of the second liquid LQ2 and the supply of gas may be performed in parallel.
- the substrate P is removed using the second liquid LQ2 supplied from the supply members 51 and 52 of the cleaning device 50. It can also be washed. If the substrate P is subjected to immersion exposure while the substrate P is held by the substrate holder PH, the liquid enters the lower surface side of the substrate P via the gap A and the gap B (see FIG. 10). There is a risk of foreign matter adhering to the side surface or the lower surface of the substrate P, or an adhesion trace of the first liquid LQ1 being formed.
- the side surface and the lower surface of the substrate P can be cleaned well, even if a foreign material adheres to the side surface and the lower surface of the substrate P, the foreign material can be reduced in size or removed. Therefore, contamination of the temperature adjustment mechanism can be prevented because the substrate P transport system and the substrate P are post-beta (PEB) after the cleaning process. In addition, it is possible to prevent the occurrence of pattern defects by performing a development process after the cleaning process.
- PEB post-beta
- the second liquid LQ2 can be different from the first liquid LQ1.
- the thinner is used. Since the organic solvent such as can be used as the second liquid LQ2, deposits (foreign matter) on the side surface and the back surface of the substrate P can be effectively removed or the diameter can be reduced.
- the immersion treatment described in the first embodiment can be used in combination.
- the cleaning apparatus 50 is configured in the coater / developer apparatus CZD-SYS, but may of course be provided in the exposure apparatus EX-SYS.
- the cleaning device 50 may be provided in the middle of the transport path of the first transport system HI constituting the exposure apparatus EX-SYS. Thereby, in the exposure apparatus EX-SYS, the substrate P after the immersion exposure process can be cleaned with the second liquid LQ2.
- the cleaning device 50 may be provided in the interface part IF.
- the force described in the case of cleaning the substrate P after immersion exposure is performed in the substrate stage PST (substrate holder PH).
- An error may occur if the substrate P in contact with the first liquid LQ1 has to be unloaded from the substrate holder PH before the desired processing such as is completed. Even in such a case, the cleaning process described in the second embodiment and the third embodiment can be executed.
- a detection device that detects foreign matter (including liquid and Z or liquid adhesion traces) on the surface of the substrate P after immersion exposure is provided, and unacceptable foreign matter on the surface of the substrate P is detected. Only in this case, the substrate P may be cleaned using the cleaning device 50.
- the conditions for the cleaning process can be set based on the information regarding the substrate P described above, such as the type of the photosensitive material 2.
- a thin film 3 covering the photosensitive material 2 is formed on the surface of the substrate P to be exposed.
- the thin film 3 include an antireflection film (top ARC) and a top coat film (protective film).
- the thin film 3 may be a top coat film covering an antireflection film formed on the photosensitive material 2.
- the top coat film protects the photosensitive material 2 from the liquid, and is formed of, for example, a fluorine-based liquid repellent material! Speak.
- the immersion conditions when performing the immersion treatment described in the first embodiment are the same as those when the photosensitive material 2 is not coated with the thin film 3. Can be changed. That is, the presence / absence of the thin film 3 is used as information on the substrate P, and the immersion conditions for the immersion treatment using the immersion apparatus 30 and the liquid immersion mechanism 100 described above can be set according to the information on the thin film 3. Specifically, depending on the presence or absence of the thin film 3, for example, the immersion time can be appropriately set out of the immersion conditions. For example, when the thin film 3 is present, the predetermined substance is hardly eluted from the light-sensitive material 2 to the liquid, so that the immersion time can be shortened or the immersion process itself can be omitted.
- a predetermined substance PAG or the like
- the cleaning conditions of the cleaning process described in the second and third embodiments may be appropriately set according to the presence or absence of the thin film 3. For example, when the thin film 3 is provided, the cleaning time can be shortened or the cleaning process itself can be omitted.
- the predetermined substance of the photosensitive material 2 may be eluted into the liquid via the thin film 3, or the material of the material forming the thin film 3 may be eluted in the liquid. There is also. Therefore, it is desirable to consider information on the material (substance) of the thin film 3 as well as the presence or absence of the thin film 3 on the photosensitive material 2 as information on the substrate P at the time of immersion treatment or cleaning treatment.
- the immersion device 30 is also used as the coating (formation) device for the thin film 3. Moyo! / ⁇ .
- the first and second liquids LQ1 and LQ2 may be the same material (water) but different in properties or components (water quality).
- the properties or components of the liquid include the specific resistance value of the liquid, total organic carbon (TOC) in the liquid, particles or bubbles contained in the liquid.
- foreign substances including dissolved oxygen (DO) and dissolved gas including dissolved nitrogen (DN), metal ion content, silica concentration in the liquid, and viable bacteria.
- DO dissolved oxygen
- DN dissolved nitrogen
- metal ion content including dissolved nitrogen (DN)
- metal ion content silica concentration in the liquid
- viable bacteria for example, the first for immersion exposure 1 liquid LQl needs a sufficient cleanliness, but the second liquid LQ2 for the dipping process may be less clean than the first liquid LQ1.
- Various fluids such as a supercritical fluid can be used as the first and second liquids LQ1 and LQ2.
- first and second liquids LQ1, LQ2 may be made of the same material (water) and different in temperature.
- the cleaning process time is set so that the force after the immersion exposure is completed (step S7) and the time force until the start of the post beta (step S8) is within a predetermined time. It is preferable to set S7. If a basic substance such as ammonia is present in the atmosphere inside the first chamber device CH1, it may be adsorbed on the surface of the photosensitive material 2, causing a neutralization reaction with the acid, resulting in an acid deactivation phenomenon. . Therefore, it is preferable to perform post-beta before the neutralization reaction is promoted. Therefore, the post-beta can be executed before the neutralization reaction is promoted by setting the cleaning processing time in consideration of the time from the end of immersion exposure until the start of the post-beta.
- a novolak resin-based resist may be used, for example, without the force PAG described as an example in which a chemically amplified resist is used as the photosensitive material 2. Even in such a case, immersion exposure processing can be performed after removing foreign matters on the photosensitive material in advance by performing the immersion processing. Further, by performing a cleaning process after the immersion exposure process, it is possible to prevent the formation of adhesion traces.
- the liquid (first liquid) in the present embodiment is pure water.
- Pure water has the advantage that it can be easily obtained in large quantities at semiconductor manufacturing factories and the like, and has no adverse effect on the photoresist on the substrate P and optical elements (lenses).
- pure water has no harmful effect on the environment and has an extremely low impurity content, so that it cleans the surface of the substrate P and the surface of the optical element provided on the front end surface of the projection optical system PL. Can also be expected.
- the exposure apparatus may have an ultrapure water production device.
- the refractive index n of pure water (water) for exposure light EL with a wavelength of about 193 nm is said to be about 1.44, and ArF excimer laser light (wavelength 193 nm) is used as the light source for exposure light EL.
- ArF excimer laser light wavelength 193 nm
- lZn on the substrate P that is, the wavelength is shortened to about 134 nm, and high resolution can be obtained.
- the projection optical system can be used if it is sufficient to ensure the same depth of focus as in the air.
- the numerical aperture of the PL can be further increased, and the resolution is also improved in this respect.
- the numerical aperture NA of the projection optical system may be 0.9 to 1.3. In this way, when the numerical aperture NA of the projection optical system becomes large, it has been used as exposure light from the past! Because random polarization light, the imaging performance may be deteriorated due to the polarization effect. It is desirable to use polarized illumination. In that case, linearly polarized illumination is performed in line with the longitudinal direction of the line pattern of the mask 'reticle' line 'and' space pattern. From the mask (reticle) pattern, the S-polarized component (TE-polarized component), that is, It is preferable to emit a large amount of diffracted light having a polarization direction component along the longitudinal direction of the line pattern.
- TE-polarized component From the mask (reticle) pattern, the S-polarized component (TE-polarized component), that is, It is preferable to emit a large amount of diffracted light having a polarization direction component along the longitudinal direction of the line pattern.
- the space between the projection optical system PL and the resist coated on the surface of the substrate P is filled with liquid
- the space between the projection optical system PL and the resist coated on the surface of the substrate P is filled with air (gas).
- the numerical aperture NA of the projection optical system is 1.0. Even in such a case, high imaging performance can be obtained. Further, it is more effective to appropriately combine the phase shift mask with an oblique incidence illumination method (particularly a dipole illumination method) or the like according to the longitudinal direction of the line pattern as disclosed in JP-A-6-188169.
- the combination of the linear polarization illumination method and the dipole illumination method is used when the periodic direction of the line 'and' space pattern is limited to a predetermined direction V, or the hole pattern is formed along the predetermined direction. It is effective when there is a crowd.
- the illumination ⁇ defined by the circumscribed circle of the two light beams that form a dipole on the pupil plane of the illumination system is 0.95
- the radius of each light beam on the pupil plane is 0.125 ⁇
- the depth of focus (DOF) can be increased by about 150 nm compared to using randomly polarized light.
- an ArF excimer laser is used as exposure light
- a projection optical system PL with a reduction magnification of about 1Z4 is used to form a fine line-and-space pattern (for example, a line-and-space of about 25-50 nm)
- the mask M acts as a polarizing plate due to the wave guide effect, and the P-polarized component reduces the contrast.
- the diffracted light of the S-polarized component (TE-polarized component) is larger than the diffracted light of the (TM-polarized component), and the mask M force is also emitted.
- the numerical aperture NA of the projection optical system PL is as large as 0.9 to 1.3.
- high resolution performance can be obtained.
- the P polarization component (TM polarization component) is changed to the S polarization component (TE polarization component) by the Wire Grid effect.
- TM polarization component the P polarization component
- TE polarization component the S polarization component
- the diffracted light of the S-polarized component (TE-polarized component) is emitted by the mask M force more than the diffracted light of the P-polarized component (TM-polarized component), so the aperture of the projection optical system PL Even when the numerical value NA is as large as 0.9 to 1.3, high resolution performance can be obtained.
- polarized illumination that linearly polarizes in the tangential direction of the circle around the optical axis.
- annular illumination method an annular illumination method in which a half-tone phase shift mask with a transmittance of 6% (a pattern with a noise pitch of about 63 nm) is linearly polarized in the tangential direction of a circle centered on the optical axis.
- progressive focus exposure methods disclosed in JP-A-4-277612 and JP-A-2001-345245 and multiple wavelengths (for example, two wavelengths) can be used. It is also effective to apply a multi-wavelength exposure method that uses exposure light to obtain the same effect as the progressive focus exposure method.
- an optical element LSI is attached to the tip of the projection optical system PL, and the optical characteristics of the projection optical system PL such as aberration (spherical aberration, coma aberration, etc.) are adjusted by this optical element. It can be carried out.
- the optical element attached to the tip of the projection optical system PL may be an optical plate used for adjusting the optical characteristics of the projection optical system PL. Alternatively, it may be a plane parallel plate that can transmit the exposure light EL.
- the projection optical system PL and the surface of the substrate P are configured to be filled with a liquid.
- a cover glass having parallel plane plate force is attached to the surface of the substrate P. It may be configured to fill liquid LQ in the state.
- the optical path space on the image plane side of the optical element at the tip is filled with liquid, but as disclosed in International Publication No. 2004Z019128, Employs a projection optical system that fills the optical path space on the mask side of the optical element with liquid. I'll do it for you.
- the liquid (first liquid) of this embodiment is water, it may be a liquid other than water! /,
- the light source of the exposure light EL is an F laser
- this F Laser light does not pass through water
- FPE fluorine-based fluids
- fluorine-based oils such as fluorine-based oils
- a lyophilic process is performed by forming a thin film with a substance having a small molecular structure including fluorine, for example, in a portion that comes into contact with the liquid.
- liquid LQ is stable against the photoresist applied to the projection optical system PL or the substrate P, which has a high refractive index as much as possible and is transmissive to the exposure light EL (for example, Cedar). Oil) can also be used.
- the surface treatment is performed according to the polarity of the liquid LQ used.
- the substrate P in each of the above embodiments is not limited to 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 a mask used in an exposure apparatus.
- Reticle masters synthetic quartz, silicon wafers are applied.
- a step-and-scan scanning exposure apparatus (in addition to the scanning steno, mask M It can also be applied to a step-and-repeat projection exposure apparatus (steno) in which the pattern of the mask M is collectively exposed while the substrate P is stationary and the substrate P is moved stepwise.
- a reduced image of the first pattern is projected with the first pattern and the substrate P substantially stationary (for example, a refraction type including a reflective element at a 1Z8 reduction magnification). It can also be applied to an exposure apparatus that uses a projection optical system) to perform batch exposure on the substrate P. In this case, after that, with the second pattern and the substrate P almost stationary, a reduced image of the second pattern is collectively exposed on the substrate P by partially overlapping the first pattern using the projection optical system. It can also be applied to a stitch type batch exposure apparatus. In addition, the stitch type exposure apparatus can also be applied to 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.
- the exposure apparatus provided with the projection optical system PL has been described as an example. The present invention can be applied to an exposure apparatus and an exposure method that do not use the force projection optical system PL.
- the present invention can also be applied to a twin stage type exposure apparatus.
- the structure and exposure operation of a twin stage type exposure apparatus are described in, for example, Japanese Patent Laid-Open Nos. 10-163099 and 10-214783 (corresponding US Pat. Nos. 6,341,007, 6,400,441, 6,549,269 and 6). , 590,634), Special Table 2000-505958 (corresponding U.S. Pat. No. 5,969,441) or U.S. Pat.No. 6,208,407, and is permitted by the laws of the country specified or selected in this international application. As far as they are accepted, their disclosure is incorporated herein by reference.
- a substrate stage for holding a substrate, a reference member on which a reference mark is formed, and a measurement stage on which various photoelectric sensors are mounted can also be applied to an exposure apparatus.
- an exposure apparatus that locally fills the liquid between the projection optical system PL and the substrate P is employed.
- the present invention is disclosed in JP-A-6-124873, Liquid immersion in which exposure is performed with the entire surface of the substrate to be exposed immersed in the liquid as disclosed in JP-A-10-303114 and US Pat. No. 5,825,043. It is also applicable to exposure equipment.
- the structure and exposure operation of such an immersion exposure apparatus is described in detail in US Pat. No. 5,825,043, to the extent permitted by national legislation designated or selected in this international application. The contents of this US patent are incorporated herein by reference.
- the type of exposure apparatus EX is not limited to an exposure apparatus for manufacturing a semiconductor element that exposes a semiconductor element pattern onto a substrate P, but an exposure apparatus for manufacturing a liquid crystal display element or a display, a thin film magnetic head, It can be widely applied to an exposure device for manufacturing an imaging device (CCD) or a reticle or mask.
- CCD imaging device
- each stage PST and MST may be a type that moves along a guide or a guideless type that does not have a guide.
- a linear motor is used on the stage.
- each stage PST, MST is such that a magnet mute with two-dimensionally arranged magnets is opposed to an armature unit with two-dimensionally arranged coils, and each stage PST, MST is driven by electromagnetic force.
- either one of the magnet unit or armature unit is connected to the stage PST or MST, and the other of the magnet unit or armature unit is provided on the moving surface side of the stage PST or MST!
- the exposure apparatus EX provides various subsystems including the constituent elements recited in the claims of the present application with predetermined mechanical accuracy, electrical accuracy, and optical accuracy. Manufactured by assembling to keep. In order to ensure these various accuracies, before and after this assembly, various optical systems are adjusted to achieve optical accuracy, various mechanical systems are adjusted to achieve mechanical accuracy, various electrical systems Adjustments are made to achieve electrical accuracy.
- Various subsystem powers The assembly process to the exposure equipment includes mechanical connections, electrical circuit wiring connections, and pneumatic circuit piping connections between the various subsystems. Needless to say, there is an assembly process for each subsystem before the assembly process to the exposure apparatus. When the assembly process of the various subsystems to the exposure apparatus is completed, comprehensive adjustment is performed to ensure various accuracies as the entire exposure apparatus. Exposure equipment is manufactured at a temperature and It is desirable to perform in a clean room where the degree of cleanliness is controlled.
- a microdevice such as a semiconductor device includes a step 201 for designing the function and performance of the microdevice, a step 202 for producing a mask (reticle) based on this design step, Step 203 for manufacturing a substrate as a base material, substrate processing (exposure processing step) 204 for exposing a mask pattern onto the substrate by the exposure apparatus EX of the above-described embodiment, and exposing the exposed substrate, device assembly step (dicing process) (Including processing processes such as bonding process and knocking process) 205, inspection step 206, etc.
- the substrate processing step 204 includes the dipping and cleaning steps described with reference to FIGS. 3 and 13 separately from the exposure step.
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Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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EP05805228A EP1814144B1 (en) | 2004-10-26 | 2005-10-25 | Substrate processing method and device production system |
US11/666,165 US8040489B2 (en) | 2004-10-26 | 2005-10-25 | Substrate processing method, exposure apparatus, and method for producing device by immersing substrate in second liquid before immersion exposure through first liquid |
CN2005800359899A CN101044594B (zh) | 2004-10-26 | 2005-10-25 | 衬底处理方法、曝光装置及器件制造方法 |
KR1020077003267A KR101236120B1 (ko) | 2004-10-26 | 2005-10-25 | 기판 처리 방법, 노광 장치 및 디바이스 제조 방법 |
KR1020127016035A KR101285951B1 (ko) | 2004-10-26 | 2005-10-25 | 기판 처리 방법, 노광 장치 및 디바이스 제조 방법 |
US11/808,349 US20070242248A1 (en) | 2004-10-26 | 2007-06-08 | Substrate processing method, exposure apparatus, and method for producing device |
US12/155,714 US8941808B2 (en) | 2004-10-26 | 2008-06-09 | Immersion lithographic apparatus rinsing outer contour of substrate with immersion space |
US13/137,789 US20120008112A1 (en) | 2004-10-26 | 2011-09-13 | Substrate processing method, exposure apparatus, and method for producing device by immersing substrate in second liquid before immersion exposure through first liquid |
Applications Claiming Priority (2)
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JP2004310993 | 2004-10-26 | ||
JP2004-310993 | 2004-10-26 |
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US11/666,165 A-371-Of-International US8040489B2 (en) | 2004-10-26 | 2005-10-25 | Substrate processing method, exposure apparatus, and method for producing device by immersing substrate in second liquid before immersion exposure through first liquid |
US11/808,349 Division US20070242248A1 (en) | 2004-10-26 | 2007-06-08 | Substrate processing method, exposure apparatus, and method for producing device |
US12/155,714 Division US8941808B2 (en) | 2004-10-26 | 2008-06-09 | Immersion lithographic apparatus rinsing outer contour of substrate with immersion space |
US13/137,789 Division US20120008112A1 (en) | 2004-10-26 | 2011-09-13 | Substrate processing method, exposure apparatus, and method for producing device by immersing substrate in second liquid before immersion exposure through first liquid |
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US (3) | US8040489B2 (ja) |
EP (1) | EP1814144B1 (ja) |
JP (2) | JP4665712B2 (ja) |
KR (2) | KR101285951B1 (ja) |
CN (2) | CN101044594B (ja) |
HK (1) | HK1147567A1 (ja) |
TW (1) | TWI436403B (ja) |
WO (1) | WO2006046562A1 (ja) |
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- 2005-10-25 KR KR1020127016035A patent/KR101285951B1/ko active IP Right Grant
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JP2008283156A (ja) * | 2006-05-18 | 2008-11-20 | Nikon Corp | 露光方法及び装置、メンテナンス方法、並びにデバイス製造方法 |
US8514366B2 (en) | 2006-05-18 | 2013-08-20 | Nikon Corporation | Exposure method and apparatus, maintenance method and device manufacturing method |
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Also Published As
Publication number | Publication date |
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HK1147567A1 (en) | 2011-08-12 |
EP1814144A4 (en) | 2010-01-06 |
KR20070068341A (ko) | 2007-06-29 |
EP1814144A1 (en) | 2007-08-01 |
KR101285951B1 (ko) | 2013-07-12 |
US20120008112A1 (en) | 2012-01-12 |
US8941808B2 (en) | 2015-01-27 |
US20080246931A1 (en) | 2008-10-09 |
JP2006156974A (ja) | 2006-06-15 |
CN101044594B (zh) | 2010-05-12 |
US20080143980A1 (en) | 2008-06-19 |
JP5408006B2 (ja) | 2014-02-05 |
TWI436403B (zh) | 2014-05-01 |
KR101236120B1 (ko) | 2013-02-28 |
CN101866113A (zh) | 2010-10-20 |
EP1814144B1 (en) | 2012-06-06 |
CN101044594A (zh) | 2007-09-26 |
JP2010177693A (ja) | 2010-08-12 |
TW200631073A (en) | 2006-09-01 |
KR20120075497A (ko) | 2012-07-06 |
CN101866113B (zh) | 2013-04-24 |
JP4665712B2 (ja) | 2011-04-06 |
US8040489B2 (en) | 2011-10-18 |
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