WO2006057263A1 - 移動体システム、露光装置及びデバイス製造方法 - Google Patents
移動体システム、露光装置及びデバイス製造方法 Download PDFInfo
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- WO2006057263A1 WO2006057263A1 PCT/JP2005/021512 JP2005021512W WO2006057263A1 WO 2006057263 A1 WO2006057263 A1 WO 2006057263A1 JP 2005021512 W JP2005021512 W JP 2005021512W WO 2006057263 A1 WO2006057263 A1 WO 2006057263A1
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- mobile system
- moving bodies
- exposure apparatus
- shock absorber
- moving
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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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/708—Construction of apparatus, e.g. environment aspects, hygiene aspects or materials
- G03F7/70808—Construction details, e.g. housing, load-lock, seals or windows for passing light in or out of apparatus
-
- G—PHYSICS
- G12—INSTRUMENT DETAILS
- G12B—CONSTRUCTIONAL DETAILS OF INSTRUMENTS, OR COMPARABLE DETAILS OF OTHER APPARATUS, NOT OTHERWISE PROVIDED FOR
- G12B5/00—Adjusting position or attitude, e.g. level, of instruments or other apparatus, or of parts thereof; Compensating for the effects of tilting or acceleration, e.g. for optical apparatus
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2041—Exposure; Apparatus therefor in the presence of a fluid, e.g. immersion; using fluid cooling means
-
- 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
- G03F7/2049—Exposure; Apparatus therefor using a cantilever
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70216—Mask projection systems
- G03F7/70341—Details of immersion lithography aspects, e.g. exposure media or control of immersion liquid supply
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70716—Stages
- G03F7/70725—Stages control
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70733—Handling masks and workpieces, e.g. exchange of workpiece or mask, transport of workpiece or mask
-
- 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
- G03F7/70858—Environment aspects, e.g. pressure of beam-path gas, temperature
- G03F7/709—Vibration, e.g. vibration detection, compensation, suppression or isolation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/68—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for positioning, orientation or alignment
- H01L21/682—Mask-wafer alignment
Definitions
- the present invention relates to a moving body system, an exposure apparatus, and a device manufacturing method, and more specifically, includes a moving body system having two moving bodies that can move independently in a predetermined one axial direction, and the moving body system.
- the present invention relates to an exposure apparatus and a device manufacturing method for transferring a device pattern onto a substrate using the exposure apparatus.
- Step-and-repeat type reduction projection exposure apparatus (so-called “so-called” “weno”) on a photosensitive object such as a wafer or a glass plate coated with a film, and so on.
- Step projections and step “and” scan type projection exposure apparatuses are mainly used.
- the depth of focus is increased by a factor of n compared to a projection optical system that can be obtained without using the immersion method (assuming that such a projection optical system can be manufactured), that is, the depth of focus is substantially reduced compared to that in air. It can be enlarged n times.
- both stages collide when the control of both stages cannot be performed accurately, that is, when both stages run away. there is a possibility. If such a collision occurs, both stages will be damaged, and the control performance including the positioning accuracy of the stages may be deteriorated due to the damage of both stages.
- Patent Document 1 Pamphlet of International Publication No. 99Z49504
- Patent Document 2 Japanese Patent Laid-Open No. 11-135400
- Patent Document 3 Japanese Patent Laid-Open No. 3-211812
- the present invention has been made under the circumstances described above.
- the present invention is a moving body system having two moving bodies that can move independently in a predetermined uniaxial direction,
- the stagger mechanism that prevents the two moving bodies from approaching each other than a predetermined distance; and canceling the blocking by the stubber mechanism, and allowing the two moving bodies to approach closer than the predetermined distance.
- a release mechanism that prevents the two moving bodies from approaching each other than a predetermined distance; and canceling the blocking by the stubber mechanism, and allowing the two moving bodies to approach closer than the predetermined distance.
- the stagger mechanism prevents the two moving bodies from approaching each other than a predetermined distance, and when the blocking mechanism releases the blocking mechanism, the two moving bodies are removed. It can be made closer than a predetermined distance. For this reason, if the moving objects are driven independently, for example, at least one of the two moving objects may run away. Even in this case, it is possible to prevent contact between the moving bodies by the stagger mechanism.
- the blocking mechanism is canceled by the release mechanism, so that both moving bodies are not disturbed by the stop mechanism. It becomes possible to approach.
- an exposure apparatus that exposes a substrate to form a pattern on the substrate, and holds the substrate on at least one of the two moving bodies.
- a first exposure apparatus comprising: a first mobile system according to the present invention; and a control device that controls the operation of the release mechanism.
- the stopper mechanism when exposing a substrate held by at least one of the two mobile bodies, it is a case where at least one of the mobile bodies runs away.
- the stagger mechanism can prevent contact and damage between the two moving bodies. As a result, the controllability of the moving body can be maintained high, and as a result, the exposure accuracy can be maintained high.
- the release device can release the blocking of the strobe mechanism, the two moving bodies can be brought closer to each other, so even if it is necessary to bring the two moving bodies closer to each other due to operations related to exposure, etc. It is possible to make two moving objects approach without disturbing.
- an exposure apparatus that supplies a liquid between an optical system and a substrate, and exposes the substrate with an energy beam through the optical system and the liquid.
- the two moving bodies each have an immersion-possible region capable of holding the liquid between the optical system and hold the substrate on at least one of the two moving bodies.
- the two moving bodies abut or approach each other to move the liquid from one liquid-immersible area of the two moving bodies to the other liquid-immersible area.
- a control device that controls the operations of the two moving bodies while maintaining the predetermined state.
- the stagger mechanism that constitutes the moving body system is set in a state that can prevent the two moving bodies from approaching. So on the other hand, when moving the liquid immersion area from one liquid immersion possible area to the other liquid immersion possible area of the two moving bodies, the blocking device releases the blocking by the release mechanism. The operation of the two moving bodies is controlled while maintaining a predetermined state where the two moving bodies are in contact with each other or closer than the predetermined distance.
- a moving body system including two moving bodies that can move independently in a predetermined uniaxial direction; and the two moving bodies that are related to the predetermined uniaxial direction. And a changing device capable of changing the accessible distance between a plurality of preset distances.
- an exposure apparatus for exposing a substrate to form a pattern on the substrate, wherein the second holding unit holds the substrate on at least one of the two moving bodies.
- a third exposure apparatus comprising: a mobile system; and a control device that controls the operation of the changing device.
- the present invention is a device manufacturing method using any one of the first to third exposure apparatuses of the present invention from another viewpoint.
- FIG. 1 is a schematic view showing an exposure apparatus according to an embodiment.
- FIG. 2 is a plan view of the stage apparatus of FIG.
- FIG. 3 (A) to FIG. 3 (C) are views for explaining a detaching member provided on a measurement table.
- FIG. 4 is a perspective view showing + X side ends of X-axis stators 80 and 81.
- FIG. 5 is a diagram for explaining the configuration of a shock absorber.
- FIG. 6 (A) to FIG. 6 (D) are views for explaining the operation of the stagger mechanism.
- FIG. 7 is a plan view showing a state in which the X-axis stators are closest to each other.
- FIG. 8 is a block diagram showing a main configuration of a control system of the exposure apparatus according to the embodiment.
- FIG. 9 is a plan view showing a state in which the measurement stage is directly under the projection optical system.
- FIG. 10 (A) and FIG. 10 (B) are views showing a modification (part 1) of the stagger mechanism.
- FIG. 11 (A) to FIG. 11 (D) are views showing a modification (part 2) of the stagger mechanism.
- Figures 12 (A) and 12 (B) show the relative X-axis direction of the X-axis stators 80 and 81 (wafer table WTB and measurement table MTB) with the shock absorber and the shirter in contact. It is a figure for demonstrating a movement.
- FIG. 13 is a flowchart for explaining a device manufacturing method according to the present invention.
- FIG. 14 is a flowchart showing a specific example of step 204 in FIG.
- FIG. 1 schematically shows a configuration of an exposure apparatus 100 according to an embodiment of the present invention.
- the exposure apparatus 100 is a step-and-scan type scanning exposure apparatus, that is, a so-called scanner.
- the exposure apparatus 100 includes an illumination system 10 and a reticle stage RS that holds a reticle R that is illuminated by exposure illumination light (hereinafter referred to as “illumination light” or “exposure light”) from the illumination system 10.
- T including projection optical system PL including projection optical system PL for projecting illumination light IL emitted from reticle R onto wafer W, stage device 50 including wafer stage WST and measurement stage MST, and a control system thereof. It is out. Wafer W is now placed on wafer stage WST! /
- the illumination system 10 includes an illuminance including a light source, an optical integrator, and the like, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-313250 and the corresponding US Patent Application Publication No. 2003Z0025890. It includes a homogenizing optical system, beam splitter, relay lens, variable ND filter, reticle blind, etc. (all not shown).
- the slit-shaped illumination area on the reticle R defined by the reticle blind is illuminated with illumination light (exposure light) IL with a substantially uniform illuminance.
- the illumination light IL For example, ArF excimer laser light (wavelength 193 nm) is used as an example.
- a fly-eye lens As the optical integrator, a fly-eye lens, a rod integrator (an internal reflection type integrator), a diffractive optical element, or the like can be used.
- a rod integrator an internal reflection type integrator
- a diffractive optical element or the like.
- a reticle R on which a circuit pattern or the like is formed on its pattern surface (lower surface in FIG. 1) is fixed by, for example, vacuum suction.
- the reticle stage RST can be driven minutely in the XY plane by a reticle stage drive system 11 (not shown in FIG. 1, see FIG. 8) including a linear motor, for example, and has a predetermined running direction (here, It can be driven at the scanning speed specified in the Y-axis direction, which is the left-right direction in the page of Fig. 1.
- reticle interferometer a reticle laser interferometer
- mirror 15 actually Y (For example, 0.5 to Lnm is always detected with a resolution of about 0.5 nm through a Y moving mirror having a reflecting surface orthogonal to the axial direction and an X moving mirror having a reflecting surface orthogonal to the X axial direction). Is done.
- the measurement value of reticle interferometer 116 is sent to main controller 20 (not shown in FIG. 1, see FIG.
- main controller 20 determines the value of reticle stage RST based on the measurement value of reticle interferometer 116. While calculating the position in the X-axis direction, the Y-axis direction, and the 0z direction (rotation direction around the Z-axis), and controlling the reticle stage drive system 11 based on this calculation result, the position of the reticle stage RST (and Speed).
- the end surface of the reticle stage RST may be mirror-finished to form a reflective surface (corresponding to the reflective surface of the movable mirror 15).
- first reference mark a pair of reticle alignment marks on the reticle R and a corresponding pair of reference marks on the measurement stage MST (hereinafter referred to as "first reference mark") via the projection optical system PL.
- a pair of reticle alignment detection systems RAa and RA b which are made up of TTR (Through The Reticle) alignment system using light of the exposure wavelength for simultaneous observation.
- TTR Through The Reticle
- RAa and RAb for example, Japanese Patent Application Laid-Open No. 7-176468 and US patents corresponding thereto.
- a structure similar to that disclosed in Kyoku No. 5,646,413 is used.
- national legislation in the designated country (or selected selected country) designated in this international application the disclosure in the US patent is incorporated herein by reference.
- the projection unit PU is arranged below the reticle stage RST in FIG.
- the projection unit PU includes a lens barrel 40 and a projection optical system PL composed of a plurality of optical elements held in the lens barrel 40 in a predetermined positional relationship.
- the projection optical system PL for example, a refractive optical system having a plurality of lens (lens element) forces having a common optical axis AX in the Z-axis direction is used.
- the projection optical system PL is, for example, telecentric on both sides and has a predetermined projection magnification (for example, 1Z4 times or 1Z5 times).
- the illumination area IAR on the reticle R is illuminated by the illumination light IL from the illumination system 10
- the illumination light IL that has passed through the reticle R passes through the projection optical system PL (projection unit PU).
- the area of the IAR on the wafer W where the reduced image of the circuit pattern of the reticle R in the area IAR (reduced image of a part of the circuit pattern) is coated with a resist (photosensitive agent) on the surface (hereinafter referred to as the IAR) , Also called “exposure area”).
- a lens (hereinafter referred to as the “Weno” W side) optical element (hereinafter referred to as the optical element) constituting the projection optical system PL is used to perform exposure using the immersion method.
- the optical element constituting the projection optical system PL
- a liquid supply nozzle 31 A and a liquid recovery nozzle 31 B constituting the liquid immersion device 32 are provided.
- the liquid supply nozzle 31 A is connected to the other end of a supply pipe (not shown) whose one end is connected to a liquid supply device 5 (not shown in FIG. 1, see FIG. 8).
- the recovery nozzle 31B is connected to the other end of a recovery pipe (not shown) whose one end is connected to the liquid recovery device 6 (not shown in FIG. 1, see FIG. 8).
- the liquid supply device 5 includes a liquid tank, a pressure pump, a temperature control device, a valve for controlling supply / stop of the liquid to the supply pipe, and the like.
- the valve for example, it is desirable to use a flow rate control valve so that not only liquid supply is stopped but also the flow rate can be adjusted.
- the temperature control device adjusts the temperature of the liquid in the liquid tank to the same temperature as the temperature in a chamber (not shown) in which the exposure apparatus is accommodated. It should be noted that tanks, pressure pumps, temperature control devices, valves, etc. for supplying liquid do not need to be all provided in exposure apparatus 100, and at least some of them are factories where exposure apparatus 100 is installed. It can also be replaced with the equipment.
- the liquid recovery device 6 includes a liquid tank and a suction pump, a valve for controlling recovery / stop of the liquid via a recovery pipe, and the like.
- As the valve it is desirable to use a flow control valve corresponding to the valve on the liquid supply device 5 side described above.
- the tank, suction pump, valve, etc. for collecting the liquid need not all be equipped with the exposure apparatus 100, but at least a part of it is installed at the factory where the exposure apparatus 100 is installed. An alternative is also possible.
- ultrapure water that transmits ArF excimer laser light (light having a wavelength of 193 nm) (hereinafter simply referred to as "water” unless otherwise required) is used. Let's say. Ultra-pure water has the advantage that it can be easily obtained in large quantities at semiconductor manufacturing plants, etc., and does not adversely affect the photoresist, optical lenses, etc. on the wafer.
- the refractive index n of water with respect to ArF excimer laser light is approximately 1.44.
- Each of the liquid supply device 5 and the liquid recovery device 6 includes a controller, and each controller is controlled by the main controller 20 (see FIG. 8).
- the controller of the liquid supply device 5 opens a valve connected to the supply pipe at a predetermined opening, and between the leading ball 191 and Ueno, W through the liquid supply nozzle 31A.
- the controller of the liquid recovery apparatus 6 opens the valve connected to the recovery pipe at a predetermined opening degree in response to an instruction from the main control apparatus 20, and the front ball 191 and the wafer via the liquid recovery nozzle 31B. Force between W Collects water in the liquid recovery device 6 (liquid tank).
- the main controller 20 determines whether the leading ball 191 and the wafer W Liquid supply nozzle 31 A force between the controller of the liquid supply device 5 and the liquid recovery device 6 so that the amount of water supplied is always equal to the amount of water recovered via the liquid recovery nozzle 3 IB. Command to the controller. Therefore, a certain amount of water Lq (see FIG. 1) is held between the tip 191 and the wafer W. In this case, the water Lq held between the leading ball 191 and the wafer W is constantly changing.
- the liquid immersion device 32 of the present embodiment includes the liquid supply device 5, the liquid recovery device 6, the supply tube, the recovery tube, the liquid supply nozzle 31A, and the liquid recovery nozzle 31B. And the like.
- the stage device 50 includes a base board 12, a wafer stage WST and a measurement stage MST arranged above the upper surface of the base board 12, and a Y-axis interference that measures the positions of these stages WST and MST.
- An interferometer system 118 including a total of 16 and 18 (see FIG. 8) and a stage drive system 124 (see FIG. 8) for driving the stages WST and MST are included.
- non-contact bearings for example, vacuum preload type aerostatic bearings (hereinafter referred to as "air pads") are provided at a plurality of locations.
- the air stage force of the wafer stage WST and measurement stage MST above the upper surface of the base board 12 is also due to the static pressure of the pressurized air blown toward the upper surface of the base board 12. It is levitated and supported in a non-contact manner with a clearance of about several zm.
- Each stage WST and MST can be driven in a two-dimensional direction independently by the stage drive system 124 in the X-axis direction (left-right direction in the drawing in FIG. 1) and Y-axis direction (direction orthogonal to the drawing in FIG. 1). It is configured.
- a pair of Y-axis stators 86 and 87 extending in the Y-axis direction are arranged at a predetermined interval in the X-axis direction.
- These Y-axis stators 86 and 87 are composed of, for example, a magnetic pole unit containing a permanent magnet group consisting of a plurality of pairs of N-pole magnets and S-pole magnets arranged alternately at predetermined intervals along the Y-axis direction. It has been.
- These Y-axis stators 86 and 87 are provided in a non-contact state in a state where they are engaged with the corresponding shaft-axis stators 86 and 87. .
- a total of four saddle shaft movers 82, 84, 83, 85 are inserted into the inner space of the saddle shaft stator 86 or 87 having a U-shaped cross section, and the corresponding shaft stator For example, it is supported by levitation with respect to 86 or 87 through a notch (not shown), for example, with a clearance of about several ⁇ m .
- Each of the Y-axis movers 82, 84, 83, and 85 is configured by an armature unit that incorporates, for example, armature coils arranged at predetermined intervals along the Y-axis direction.
- the Y-axis movers 82 and 84 formed of armature units and the Y-axis stator 86 formed of magnetic pole units constitute moving coil type Y-axis linear motors.
- the Y-axis movers 83 and 85 and the Y-axis stator 87 constitute moving coil type Y-axis linear motors.
- each of the above four Y-axis linear motors is appropriately designated by using the same reference numerals as those of the respective Y-axis movers 82, 84, 83, 85, and the Y-axis linear motor 82, Y-axis linear motor.
- 84, Y-axis linear motor 83, and Y-axis linear motor 85 are appropriately designated by using the same reference numerals as those of the respective Y-axis movers 82, 84, 83, 85, and the Y-axis linear motor 82, Y-axis linear motor.
- the movers 82 and 83 of the two Y-axis linear motors 82 and 83 are provided at one end and the other end of the X-axis stator 80 extending in the X-axis direction. Each is fixed.
- the remaining two Y-axis linear motors 84 and 85 are fixed to one end and the other end of the X-axis stator 81 extending from the mover 84 and 85 ⁇ in the X-axis direction. Accordingly, the X-axis stators 80 and 81 are driven along the shaft by the pair of shaft linear motors 82, 83, 84, and 85, respectively.
- Each of the X-axis stators 80, 81 is configured by an armature unit that incorporates armature coils arranged at a predetermined interval along the X-axis direction, for example.
- One X-axis stator 81 is provided in an inserted state in an opening (not shown) formed in an X moving body 91 (not shown in FIG. 2, refer to FIG. 1) constituting wafer stage WST.
- a magnetic pole unit having a permanent magnet group composed of a plurality of sets of N pole magnets and S pole magnets arranged alternately at predetermined intervals along the X-axis direction. Is provided.
- the magnetic pole unit and the X-axis stator 81 constitute a moving magnet type X-axis linear motor that drives the X moving body 91 in the X-axis direction.
- the other X-axis stator 80 is provided in an inserted state in an opening formed in an X moving body 92 (not shown in FIG. 2, refer to FIG. 1) constituting the measurement stage MST.
- a magnetic pole unit similar to that on the wafer stage WST side (X moving body 91 side) is provided inside the opening of the X moving body 92.
- the magnetic pole unit and the X-axis stator 80 constitute a moving magnet type X-axis linear motor that drives the measurement stage MST in the X-axis direction.
- X-axis linear motor 81 X-axis linear motor 81 and X-axis linear motor 80, using the same reference numerals as those of X-axis stators 81 and 80 constituting the respective stators.
- each of the linear motors constituting the stage drive system 124 is controlled by the main controller 20 shown in FIG. Note that each linear motor is not limited to either a moving magnet type or a moving coil type, and can be appropriately selected as necessary.
- the wafer stage WST is mounted on the X moving body 91 and the X moving body 91 via an unillustrated ⁇ / leveling mechanism (for example, a voice coil motor). And a wafer table WTB that is relatively finely driven in the direction of rotation around the axis and the X axis (0X direction) and in the direction of rotation around the axis (0y direction).
- an unillustrated ⁇ / leveling mechanism for example, a voice coil motor.
- a wafer table WTB that is relatively finely driven in the direction of rotation around the axis and the X axis (0X direction) and in the direction of rotation around the axis (0y direction).
- wafer table WTB On wafer table WTB, a wafer for holding wafer W by vacuum suction or the like A holder (not shown) is provided.
- the top surface of the wafer table WTB is substantially flush with the wafer placed on the wafer holder and is rectangular as a whole, with a circular opening that is slightly larger than the wafer holder at the center.
- a plate (water repellent plate) 28 (see FIGS. 1 and 3) is provided.
- the auxiliary plate (water repellent plate) 28 is set to be slightly larger than the wafer table W TB.
- the liquid-repellent (water-repellent) surface of the auxiliary plate (water-repellent plate) 28 is deteriorated in the liquid-repellent (water-repellent) performance by exposure to exposure light that is generally weak to light in the far ultraviolet region or vacuum ultraviolet region. Further, there is a possibility that a liquid adhesion mark (watermark or the like) may be formed on the upper surface of the auxiliary plate (water repellent plate) 28. Therefore, the auxiliary plate (water repellent plate) 28 can be easily attached to and detached from the wafer table WTB.
- the auxiliary plate (water repellent plate) can be fixed by various methods such as a vacuum suction method or an electrostatic suction method.
- the Y end surface of this wafer table WTB is mirror-finished to form a reflecting surface 17a
- the ⁇ X end surface is similarly mirror-finished to form a reflecting surface 17b.
- These reflecting surfaces come from interferometers (Y-axis interferometer 16 for the Y-axis direction and multiple X-axis interferometers 126, 128 for the X-axis direction) that make up the interferometer system 118 (see Fig. 8).
- Interferometer beams (measurement beams) are projected, and the reflected light is received by each interferometer, so that the reference position of each reflecting surface (generally a fixed mirror on the projection unit PU side or alignment system ALG side surface).
- the measurement stage MST includes the aforementioned X mobile body 92 and the measurement table MTB mounted on the X mobile body 92! /.
- the measurement table MTB is mounted on the X moving body 92 via a Z-leveling mechanism (not shown).
- the measurement table MTB may be fixed to the X moving body 92, and the X moving body 92 may be driven in 6 degrees of freedom.
- This measurement table MTB (and X moving body 92) is provided with various measurement members! /,
- the Examples of the measurement member include a reference mark plate and a projection optical system on which a plurality of reference marks are disclosed, for example, in JP-A-5-21314 and US Pat. No. 5,243,195 corresponding thereto.
- a sensor that receives the illumination light IL through the PL is included.
- Examples of the sensor include a predetermined area for receiving the illumination light IL on the image plane of the projection optical system PL disclosed in, for example, Japanese Patent Application Laid-Open No. 11-16816 and the corresponding US Patent Application Publication No. 2002Z0061469.
- Illumination light IL on the image plane of the projection optical system PL disclosed in JP-A-57-117238 and US Pat. No. 4,465,368 corresponding thereto is disclosed.
- Irradiance unevenness sensor having a pinhole-shaped light receiving portion for receiving light, projected by a projection optical system PL disclosed in Japanese Patent Application Laid-Open No. 2002-14005 and US Patent Application Publication No. 2002 Z0041377 corresponding thereto.
- An aerial image measuring instrument that measures the light intensity of the aerial image (projected image) of the pattern can be used.
- the illumination light IL corresponds to the immersion exposure in which the wafer W is exposed by the exposure light (illumination light) IL via the projection optical system PL and water.
- the illumination light IL is received through the projection optical system PL and water.
- only a part of the optical system may be mounted on the measurement table MTB (and the X moving body 92), or the entire sensor is arranged on the measurement table MTB (and the X moving body 92). It's okay to do it!
- a detaching member 29 extending in the X-axis direction is provided at the ⁇ Y side end of the measurement table MTB.
- the detachable member 29 is made of, for example, Teflon (registered trademark) resin, and is fixed to the measurement table MTB via a permanent magnet (not shown). As shown in FIG. When an impact from the axial direction (force caused by a collision with the water-repellent plate 28) is received, it can be detached from the measurement table MTB as shown in Fig. 3 (C).
- Reflective surfaces 19a and 19b similar to the above-described wafer table WTB are also formed on the + Y end surface and the X end surface of the measurement table MTB (see FIG. 2). These reflective surfaces have an interferometer Interferometers constituting the stem 118 (see Fig. 8) (Y-axis interferometer 18 for the Y-axis direction, X-axis interferometer 126, 128 or 130 for the X-axis direction) The projected light is received by each interferometer, and the reference position of each reflecting surface (generally, a fixed mirror is placed on the side of the projection unit PU or the alignment system ALG, and this is used as the reference surface. )), And the two-dimensional position of the measurement stage MST is measured. Note that, if a measurement beam from a force X-axis interferometer (not shown in FIG. 2) does not hit, the position of the measurement table MTB is measured by the encoder 77B (see FIG. 8).
- the X-axis stator 81 and the X-axis stator 80 are provided with stopper mechanisms 48A, 48B as shown in FIG. 2 and FIG. 4 showing the vicinity of the X-axis stators 80, 81 in a perspective view. Is provided.
- One stopper mechanism 48A is located at a position (+ Y side) facing the shock absorber 7A provided on one X-axis stator 81 and the shock absorber 47A on the other X-axis stator 80. Including a shirta 49A.
- An opening 51A is formed at a position of the X-axis stator 80 facing the shock absorber 47A.
- the shock absorber 47A is composed of an oil damper, and as shown in a cross-sectional view in FIG. 5, a cylindrical (circular cross-section) cylinder 102 and a cylindrical piston provided inside the cylinder 102 104c, a piston rod 104a connected to the piston 104c, and a compression panel 106 provided on the outer periphery of the piston port 104a and sandwiched between the end surface of the cylinder 102 and the head portion 104d of the piston rod 104a 106 Including.
- the inside of the cylinder 102 is partitioned into a first chamber 108A and a second chamber 108B by a piston 104c, and the chambers 108A and 108B communicate with each other via an orifice 104b provided in the piston 104c. Yes. Hydraulic oil is injected into each of the chambers 108A and 108B.
- the shirter 49A is provided on the Y side of the opening 51A formed in the X-axis stator 80, and is driven by an arrow A by a drive mechanism 34A including an air cylinder or the like. It is driven in the A 'direction (Z-axis direction). Therefore, the opening 51A can be opened or closed by the shirter 49A.
- the opening / closing state of the shirter 49A is detected by an opening / closing sensor (not shown in FIG. 4, refer to FIG. 8) provided in the vicinity of the shirter 49A, and the detection result is sent to the main controller 20. Yes.
- the other stopper mechanism 48B has the same configuration as the one stopper mechanism 48A. That is, as shown in FIG.
- the stocko mechanism 48B includes the shock absorber 7B provided in the vicinity of the X end of one X-axis stator 81 and the aforementioned X-axis stator 80.
- a shock absorber 49B provided at a position opposite to the shock absorber 47B.
- An opening 51B is formed in the + Y side portion of the shirter 49B of the X-axis stator 80.
- FIGS. 6 (A) to 6 (D) showing an enlarged view of one stopper mechanism 48A. To do.
- FIG. 6 (A) when the shirter 49A is in a state of closing the opening 51A, as shown in FIG. 6 (B), the X-axis stator 81 and the X-axis stator Even when 80 approaches, the shock absorber 47A and shirter 49A come into contact with each other, so that the X-axis stators 80 and 81 cannot be further approached.
- the wafer table WTB is also used when the piston 104c of the shock absorber 47A moves to the Y side most (ie, when the shock absorber 47A contracts and its overall length becomes the shortest). And the measurement table MTB is not in contact with the configuration! /
- FIG. 6C when the shirt 49A is driven downward through the drive mechanism 34A, the opening 51A is opened, so that the X-axis stator 81, 80
- FIG. 6 (D) When the two approach each other, as shown in FIG. 6 (D), at least a part of the tip of the shock absorber 7A can enter the opening 51A, so the state shown in FIG. 6 (B) X-axis stators 81 and 80 can be brought closer to each other.
- the wafer table WTB and the measurement table MTB are brought into contact (or with a clearance of about 300 ⁇ m). Can be approached).
- the opening 51A has a depth (depth) even when the X-axis stators 81 and 80 are closest to each other. It may be set so that a gap is formed between (the portion corresponding to the bottom), or it may be set so that the shock absorber 7A is in contact with the end portion. Also, even if the X-axis stators 81 and 80 move relative to each other in the X-axis direction, the opening portion is previously set according to the amount of relative movement so that the shock absorber 7A does not contact the wall portion of the opening 51A. You may set the width. [0061] The other stopper 48B functions in the same manner.
- a distance detection sensor 43A and a collision detection sensor 43B are provided at the + X end of the X-axis stator 80, and a Y-axis at the + X end of the X-axis stator 81.
- a plate-like member 41 A that is elongated in the axial direction projects from the + Y side.
- the X-axis stator 80 is provided with a distance detection sensor 43C and a collision detection sensor 43D, and as shown in FIG.
- the plate-like member 41B is elongated in the direction and protrudes on the + Y side.
- the gap detection sensor 43A is composed of, for example, a transmissive photosensor (for example, LED-PTr transmissive photosensor), and as shown in FIG. 4, a U-shaped fixing member 142 and the fixing member A light emitting portion 144A and a light receiving portion 144B provided on each of a pair of opposed surfaces of 142 are included.
- this distance detection sensor 43A there is an object that does not transmit light between the light-emitting unit 144A and the light-receiving unit 144B by detecting the output of the light-receiving unit 144B that changes when the light from the light-emitting unit 144A is blocked. It detects whether or not the force to do.
- the distance detection sensor 43A when the X-axis stator 80 and the X-axis stator 81 are further approached from the state shown in FIG. 4, as shown in FIG. A plate-like member 41A is inserted between the portion 144A.
- the lower half of the plate-like member 41A blocks the light from the light emitting portion 144A, so that no light enters the light receiving portion 144B, and the output current is reduced. Therefore, the main controller 20 can detect that the distance between the moving bodies has become a predetermined distance or less by detecting the output current.
- the collision detection sensor 43B includes a U-shaped fixing member 143, and a light emitting unit 145A and a light receiving unit 145B provided on each of a pair of opposing surfaces of the fixing member 143.
- a light emitting unit 145A By detecting the output of the light receiving unit 145B that changes when the light of 145A is blocked, it detects whether or not an object exists without transmitting light between the light emitting unit 145A and the light receiving unit 145B.
- It is a sensor.
- the light emitting unit 145A is set to a position where the position (height position) in the Z-axis direction is different from the light emitting unit 144A of the interval detection sensor 43A described above.
- the light receiving unit 145B is set to a position where the position (height position) in the Z-axis direction is different from that of the light receiving unit 144B of the interval detection sensor 43A.
- the X-axis stators 81 and 80 are brought closer to each other, and the wafer
- the upper half of the plate-like member 41A is positioned between the light emitting part 145A and the light receiving part 145 B, so that the light from the light emitting part 145A receives the light receiving part 145B. Do not get light!
- the plate-like member 41A has a force in which the upper half is set longer than the lower half (in a state of protruding in the + Y direction).
- the upper half part of the plate-like member 41A is positioned between the light emitting part 145A and the light receiving part 145B. Therefore, when the collision detection sensor 43B can be set more on the Y side, a rectangular plate-shaped member may be simply used.
- interval detection sensor 43C and the collision detection sensor 43D provided near the X end of the X-axis stator are also the above-described interval detection sensor 43A and the collision detection sensor 43B provided near the X end. Since the plate-like member 41B is constituted similarly to the plate-like member 41A described above, the description thereof will be omitted.
- the holding member that holds the projection unit PU is provided with an off-axis alignment system (hereinafter abbreviated as “alignment system”) ALG. Yes.
- This alignment system ALG for example, irradiates the target mark with a broadband detection light beam that does not sensitize the resist on the wafer, and the image of the target mark formed on the light receiving surface by the reflected light of the target mark power.
- An image processing FIA that captures the image of the index shown (index pattern on the index plate installed in the alignment ALG) using an image sensor (CCD, etc.) and outputs the image signals.
- a (Field Image Alignment) type sensor is used.
- the image signal of the alignment ALG force is supplied to the main controller 20 in FIG.
- the alignment ALG is not limited to the FIA system, and the target mark is irradiated with the coherent detection light to detect the scattered light or diffracted light that also generates the target mark force, or the target ALG.
- the alignment sensor that detects two diffracted lights (eg, diffracted lights of the same order or diffracted in the same direction) that also generate a mark force can be used in combination. .
- the force irradiation system 90a not shown in FIG.
- a light receiving system 90b for example, a multiplicity of oblique incidence systems similar to those disclosed in Japanese Patent Laid-Open No. 6-283403 and US Pat. No. 5,448,332 corresponding thereto.
- a focal position detection system is provided.
- the irradiation system 90a is suspended and supported by a holding member that holds the projection unit PU on the ⁇ X side of the projection unit PU, and the light receiving system 90b is held on the + X side of the projection unit PU. Suspended and supported below the member.
- the irradiation system 90a, the light receiving system 90b, and the projection optical system PL are attached to the same member, and the positional relationship between them is maintained constant.
- national legislation in the designated country (or selected country of choice) specified in this international application, the disclosure in the US patent is incorporated herein by reference.
- FIG. 8 shows the main configuration of the control system of exposure apparatus 100.
- This control system is mainly configured of a main controller 20 composed of a microcomputer (or a workstation) that controls the entire apparatus in an integrated manner.
- the main controller 20 controls the opening and closing of the valves of the liquid supply device 5 and the liquid recovery device 6 of the liquid immersion device 32 as described above. There is always water under 191. However, in the following, in order to facilitate the description, explanations regarding the control of the liquid supply device 5 and the liquid recovery device 6 are omitted.
- FIG. 2 shows a step-and-scan method for wafer W on wafer stage WST (here, as an example, the last wafer of a lot (25 or 50 wafers)).
- wafer stage WST here, as an example, the last wafer of a lot (25 or 50 wafers)
- the state in which the exposure is performed is shown.
- measurement stage MST stands by at a predetermined standby position where it does not collide with wafer stage WST.
- the shirts 49A and 49B are set in a state of closing the openings 51A and 51B in order to prevent the Ueno, the stage WST and the measurement stage MST from approaching a predetermined distance.
- the exposure operation described above is performed by the main controller 20 in advance, for example, the results of wafer alignment such as Enhanst's Global Alignment ( EGA) and the latest measurement results of the baseline of the alignment system ALG, etc.
- EGA Enhanst's Global Alignment
- ALG latest measurement results of the baseline of the alignment system ALG
- the main control device 20 drives the shirts 49A, 49B to descend through the drive mechanisms 34A, 34B to open the openings 51A, Set 51B to the open state. After confirming that the shirters 49A and 49B are fully opened via the open / close sensor 101, the main controller 20 determines the stage drive system based on the measured values of the interferometer system 118 and the measured values of the encoder 77B. 124 is controlled to move the measurement stage MST (measurement table MTB) to the position shown in FIG. At this time, the Y side of the measurement table MTB and the + Y side of the wafer table WTB are in contact!
- the measurement value of the interferometer that measures the Y-axis position of each table is monitored, and the measurement table MTB and wafer table WTB are separated by about 300 ⁇ m in the Y-axis direction. The state of contact may be maintained.
- main controller 20 starts the operation of simultaneously driving both stages WST and MST in the ⁇ Y direction while maintaining the positional relationship between wafer table WTB and measurement table MTB in the Y-axis direction.
- the main controller 20 controls the stage drive system 124 while managing the position of the wafer stage WST based on the measurement values of the interferometer system 118 and encoder 77A.
- the wafer stage WST is moved to a fixed wafer exchange position, and the first wafer of the next lot is exchanged.
- predetermined measurement using the measurement stage MST is executed as necessary.
- An example of this measurement is the baseline measurement of alignment ALG.
- the reticle alignment marks on the reticle corresponding to the pair of first reference marks in the reference mark area provided on the measurement table MT B are set to the reticle alignment RAa, Using RAb, the positional relationship between the reticle alignment mark corresponding to the pair of first reference marks is detected at the same time.
- main controller 20 detects the positional relationship between the detection center of alignment system ALG and the second reference mark by detecting the second reference mark in the reference mark area with alignment system ALG. Then, main controller 20 determines the positional relationship between the reticle alignment mark corresponding to the pair of first reference marks, the positional relationship between the detection center of alignment system ALG and the second reference mark, and the known pair of first reference marks. Based on the positional relationship between the mark and the second reference mark, the distance between the projection center of the reticle pattern projected by the projection optical system PL and the detection center of the alignment system ALG, that is, the baseline of the alignment system ALG is obtained.
- a plurality of pairs of reticle alignment marks are formed on the reticle, and a plurality of pairs of first reference marks are formed in the reference mark area correspondingly.
- the reticle alignment system RAa and RAb are used while stepping the reticle stage RST and measurement stage MST in the Y-axis direction relative to at least two pairs of the first reference mark and the corresponding reticle alignment mark. By measuring, you can also perform so-called reticle alignment.
- the mark detection using the reticle alignment systems RAa and RAb is performed via the projection optical system PL and water.
- main controller 20 brings measurement stage MST and wafer stage WST into contact with each other while maintaining the state, while maintaining the XY plane. To return the wafer stage WST to just below the projection unit. As described above, measurement stage MST and wafer stage WST may be brought into a non-contact state. [0084] In the main controller 20, while maintaining the positional relationship of the wafer stage WST and the measurement stage MST in the Y-axis direction, the stages WST and MST are simultaneously driven in the + Y direction while maintaining the wafer stage WST.
- the measurement stage MST is retracted to a predetermined position.
- main controller 20 sets the shutters 49A and 49B in a closed state by driving up the shutters 49A and 49B via the drive mechanisms 34A and 34B.
- main controller 20 performs an exposure operation of a wafer alignment and step “and” scan method on a new wafer, and sequentially transfers the reticle pattern to a plurality of shot areas on the wafer. Thereafter, the same operation is repeated.
- Measurement stage Performs at least one of illuminance measurement, illuminance unevenness measurement, aerial image measurement, wavefront aberration measurement, etc. using the MST measuring instrument group, and the measurement result is reflected in the subsequent wafer exposure. It is also possible to make it. Specifically, for example, the projection optical system PL can be adjusted by an imaging characteristic correction controller (not shown) based on the measurement result.
- the aerial image measuring instrument, the illuminance unevenness measuring instrument, the illuminance monitor, and the wavefront aberration measuring instrument described above do not necessarily have to be provided with all of them, and only a part thereof may be mounted as necessary.
- the wafer alignment for a new wafer is performed after the measurement stage MST is retracted. At least a part of the wafer alignment for the new wafer is It may be performed before contacting the MST and with the Z or both stages WST and MST in contact.
- the position and speed of the wafer table WTB (wafer stage WST) and the position and speed of the measurement table MTB (measurement stage MST) are measured by the interferometer system 118. Is measured.
- the main controller 20 calculates the relative speed of each stage for each time, and suppresses the speed of both stages when the calculated relative speed exceeds a predetermined value (threshold). In this way, the runaway and collision of both stages are prevented.
- the two X-axis stators 80, 81 are prevented from approaching each other by a predetermined distance by the stagger mechanism 48A, 48B.
- the wafer table WTB water repellent plate 28
- the measurement table MTB are prevented from coming closer than the specified distance.
- the shirter 49A, 49B is retracted by the drive mechanism 34A, 34B, the blocking by the stopper mechanism 48A, 48B is released, and the two X-axis stators 80, 81 can be brought closer than a predetermined distance.
- the wafer table W TB (water repellent plate 28) and the measurement table MTB can be brought closer than a predetermined distance.
- wafer table WTB (or measurement table MTB) is positioned directly under projection optical system PL.
- the transition is made to the state where the measurement table MTB (or wafer table WTB) is located directly under the projection optical system PL, the blockage by the shock absorbers 49A and 49B is released.
- the wafer table WTB water repellent plate 28
- the measurement table MTB can be moved close to the projection optical system, so the following series of operations (1) to (3) are required. There is no.
- main controller 20 determines that two X-axis stators 80 when the relative speed of the two X-axis stators (relative speed between wafer table WTB and measurement table MTB) exceeds a predetermined value. , 81 (Wafer stage WST and measurement stage MST). Therefore, it is possible to prevent two X-axis stators (wafer stage WST and measurement stage MST) from running away in advance, and reduce the possibility of collision between wafer table WTB and measurement table MTB. It is possible to avoid damage to WST and measurement stage MST, maintain drive performance of each stage, and maintain exposure accuracy.
- the open / close sensor 101 that detects at least one of the case where the shirter is in the open state and the closed state is included, the two X By moving the shaft stators 80 and 81, the X-axis stators 80 and 81 are brought close to each other, or the wafer table WTB and the measurement table MTB are brought close to or in contact with each other! / Sometimes the shock absorber 47A, 47B and the shirt This avoids mechanical interference between 49A and 49B.
- the distance detecting sensors 43A and 43C are provided only by providing the stagger mechanism 48A and 48B, and the two X-axis stators 80 and 81 are more than a predetermined distance by using the sensor. Since the proximity of the wafer table WTB and the measurement table MTB can be detected, it is possible to detect the possibility of collision even if the wafer stage WST and the measurement stage MST run away. It can be further reduced.
- the collision detection sensors 43B and 43D for detecting the collision of the two X-axis stators 80 and 81 are included, two sensors are detected based on the detection results by the sensors 43B and 43D.
- By controlling the drive of the X-axis stators 80 and 81 it is possible to reduce as much as possible the impact on each table due to the collision between the wafer table WTB and the measurement table MTB.
- a collision is detected by the sensors 43B and 43D, it is possible to quickly and easily determine whether maintenance has started.
- the detaching member 29 is arranged at the end of the measurement table MTB at the Y side, even if the wafer table WTB (water repellent plate 28) and the measurement table MTB collide with each other. Thus, it is possible to minimize damage to the table itself by detaching the detaching member 29 first.
- the force with which the detaching member 29 is arranged on the measurement table MTB side is not limited to this, and the detaching member 29 may be provided at the + Y end of the wafer table WTB. good.
- the case where the X-axis stators 80 and 81 are provided with the strobe mechanism is not limited to this.
- the wafer table WTB (or) and the measuring tape are used.
- a stopper mechanism may be provided on the MTB.
- the X-axis stators 80 and 81 may be configured such that either one of the forces provided with the stopper mechanism is provided with the stopper member.
- the X-axis stators 80, 81 are provided with a stagger mechanism, the X-axis stators 80, 81 approach each other, and the wafer table WTB (water repellent plate 28) and the measurement table MTB
- a stopper mechanism can be provided on at least one of the other two objects.
- a stagger mechanism may be provided on at least one of the wafer table WTB and the measurement table MTB to prevent the wafer table WTB (water repellent plate 28) and the measurement table MTB from approaching.
- a stopper mechanism can be provided on at least one of the wafer table WTB and the measurement table MTB to prevent the X-axis stators 80 and 81 from approaching each other and the other two objects from approaching.
- the force by which the blocking function of the stopper mechanisms 48A and 48B is released before and after the wafer exchange at the wafer stage WST is not limited to this. Needless to say, the blocking function of mechanisms 48A and 48B can be canceled.
- stage device 50 includes a weno, stage WST, and measurement stage MST is not limited to this. Both stages may be wafer stages. In this case, while the exposure operation is being performed on one stage, the wafer exchange and alignment can be measured on the other stage, so that an improvement in throughput can be expected.
- a force that employs a shock absorber as a stubber mechanism is not limited to this. Even if the shock absorber is not a shock absorber (for example, an air damper), an impact from the Y-axis direction is applied. Various buffering devices can be employed if mitigation is possible. Further, the stagger mechanism is not limited to the shock absorber, and may be a stubber mechanism that does not have a buffer action.
- the shock absorber is provided on the X-axis stator 81 side, and the X-axis is fixed.
- the sleeve 80 is provided with a shirt that opens and closes the opening formed in the X-axis stator 80.
- the present invention is not limited to this, and a shock absorber is provided on the X-axis stator 80 side. An opening may be formed at the top and a shirt may be provided.
- the shirter is driven in the Z-axis direction.
- the present invention is not limited to this, and a configuration in which the shirter moves in the X-axis direction may be employed.
- a configuration in which a small lid-like member can move in the Y-axis direction inside the opening may be adopted.
- the force for providing an opening in X-axis stator 80 is not limited to this, and as shown in FIG. 10 (A), no opening is provided and shirter 49A has a thickness.
- the shock absorber 47A can It is also possible to prevent contact between WHA table (water repellent plate 28) and measurement table MTB and to cancel the blocking.
- the force of adopting the combination of the shock absorber and the shirter fixed to one of the X-axis stators 81 is not limited to this.
- a configuration in which the shock absorber can move in the Y-axis direction may be adopted.
- the shock absorber 7A is driven in the Y-axis direction by the drive mechanism 34 'that also has air cylinder force along the guide 45 provided on the X-axis stator 81. It has come to be.
- a plate member 49 ' is provided at a position of the X-axis stator 80 facing the shock absorber 7A.
- the shock absorber 47A is arranged on the + Y side, and the shock absorber 47A protrudes on the + Y side from the X-axis stator 81.
- FIG. 11 (B) even if both the X-axis stators 81 and 80 approach each other, the shock absorbers 7A and the plate member 49 come into contact with each other. , 81 cannot move closer than a predetermined distance. That is, even if at least one of the X-axis stators 80 and 81 goes out of control, it is possible to prevent contact between the wafer table WTB (water repellent plate 28) and the measurement table MTB.
- a sensor for detecting at least one of whether the position of the shock absorber 47 ⁇ ⁇ is in the position of Fig. 11 ( ⁇ ) or the state of Fig. 11 (C) is provided. Is desirable.
- the plate member 49 provided on the X-axis stator 80 may not be provided in the above modification (FIGS. 11 (B) to 11 (D)).
- the shock absorber 7 ⁇ and the drive mechanism 34 ' may be provided on the X-axis stator 80 side.
- the air cylinder is adopted as the drive mechanism 34 ', 34' for driving the shirt 49 'in the above-mentioned embodiment and the drive mechanism 34' for driving the shock absorber 7 'in the above-described modified example.
- Various drive mechanisms such as a ball screw drive mechanism, a voice coil motor, and a linear motor can be employed.
- the force using the interferometer system to obtain the position information of the wafer table WTB and the measurement table ⁇ may be used. Good.
- the transmission type photosensor is employed as the interval detection sensor and the collision detection sensor.
- the present invention is not limited to this, and for example, a photosensor is employed.
- a reflection type photo sensor, a separation type photo sensor, or the like may be used.
- not only a photo sensor but also various sensors such as a line sensor and a capacitance sensor can be used.
- the third and fourth detection devices measurement devices that directly measure the distance between the two moving bodies can be used.
- the X-axis stators 80 and 81 when the shirter 49 ⁇ (49 ⁇ ) of the stopper mechanism 48 ⁇ (48 ⁇ ) is in the closed state, the X-axis stators 80 and 81 (wafer table W The force that prevents the measurement table ⁇ ) from approaching more than the predetermined distance Even if the head 104d of the shock absorber 47 ⁇ ⁇ (47 ⁇ ) contacts the shirter 49 ⁇ (49 ⁇ ), X
- Each of the shaft stators 80 and 81 can be moved relative to each other in the X-axis direction and the Z-axis direction.
- the head part of shock absorber 47A Even if 104d contacts the shirter 49A, the X-axis stator 80, 81 (wafer table WTB and measurement table MTB) can move in the X-axis direction while restricting the approach in the Y-axis direction.
- a surface treatment for making it slippery such as coating each surface of the head part 104d and the shirter 49A with Teflon (registered trademark), is performed.
- the head portion 104A and the head portion 49A can move so as to slide on the surface while the head portion 104d and the shirt portion 49A are in contact with each other.
- the X-axis stator 80, 80 since movement in the X-axis direction is allowed even if the shirter 49A and the head part 104d are in contact with each other, the X-axis stator 80, 80, without being affected by the contact between the head part 104d and the shirter 49A.
- 81 Wafer table WTB and measurement table MTB
- the contact portion of the head portion 104d with the shirter 49A may be formed into a rotatable spherical shape.
- the X axis stators 80 and 81 move relative to each other in the X axis direction. The same applies to the Z-axis direction.
- the exposure apparatus is an immersion type exposure apparatus.
- the present invention is not limited to this, and the wafer W is exposed without using liquid (water). It can also be used in a lie-type exposure apparatus. In this case, even if two stages run away during parallel operations such as exposure and alignment, it is possible to prevent collisions between the two stages and to bring the two stages closer together. Even in some cases, it is possible to bring the two stages closer without being obstructed by the stop mechanism by releasing the blocking of the stop mechanism.
- ultrapure water water
- a safe liquid that is chemically stable and has a high transmittance of the illumination light IL such as a fluorine-based inert liquid
- a fluorine-based inert liquid may be used as the liquid.
- This fluorine As the system inert liquid for example, Fluorinert (trade name of 3EM, USA) can be used.
- This fluorine-based inert liquid is also excellent in terms of cooling effect.
- use a liquid that is transparent to the illumination light IL and has a refractive index as high as possible, and that is stable to the photoresist applied to the surface of the projection optical system wafer for example, cedar oil. It can also be used. If F laser is used as the light source, select Fomblin oil.
- the recovered liquid may be reused.
- a filter that removes impurities from the recovered liquid is provided in the liquid recovery device, the recovery pipe, or the like. It is desirable to keep it.
- the present invention is applied to a scanning exposure apparatus such as a step “and-scan” method has been described, but the scope of the present invention is of course not limited thereto. It is. That is, the present invention can be applied to a projection exposure apparatus of a step & and repeat system, an exposure apparatus of a step & and stitch system, or a proximity exposure apparatus.
- the use of the exposure apparatus is not limited to the exposure apparatus for semiconductor manufacturing.
- an exposure apparatus for liquid crystal that transfers a liquid crystal display element pattern to a square glass plate, an organic EL, and a thin film magnetic head
- exposure devices for manufacturing image sensors (CCDs, etc.), micromachines, and DNA chips can also be widely applied to exposure devices for manufacturing image sensors (CCDs, etc.), micromachines, and DNA chips.
- glass substrates, silicon wafers, etc. are used to manufacture reticles or masks used in light exposure equipment, EUV exposure equipment, X-ray exposure equipment, electron beam exposure equipment, etc. that can be used only with micro devices such as semiconductor devices.
- the present invention can also be applied to an exposure apparatus that transfers a circuit pattern.
- the light source of the exposure apparatus of the above embodiment is not limited to the ArF excimer laser, but is a KrF excimer laser (output wavelength 248 nm), F laser (output wavelength 157 nm), Ar laser (output)
- Pulse laser light source such as 126nm wavelength, Kr laser (output wavelength 146nm), g-line (wave
- an ultra-high pressure mercury lamp that emits bright lines such as 436 nm long and i-line (wavelength 365 nm).
- a harmonic generator of a YAG laser can also be used.
- DFB semiconductor laser or fiber laser power oscillates infrared or visible single wavelength laser light, for example erbium (or both erbium and ytterbium)
- harmonics that have been amplified with an S-doped fiber amplifier and converted to ultraviolet light using a nonlinear optical crystal.
- the projection optical system may be not only a reduction system but also an equal magnification and an enlargement system.
- the illumination light IL of the exposure apparatus is not limited to light having a wavelength of lOOnm or more, and light having a wavelength of lOOnm or less may be used.
- EUV Extreme Ultraviolet
- SOR Spin-Reflection Reduction
- a plasma laser as a light source
- An EUV exposure system using an all-reflection reduction optical system designed under a wavelength (eg, 13.5 nm) and a reflective mask is being developed. In this system, it is conceivable to perform scanning exposure by scanning the mask and wafer synchronously using arc illumination.
- FIG. 13 shows a flowchart of a manufacturing example of a device (a semiconductor chip such as an IC or LSI, a liquid crystal panel, a CCD, a thin film magnetic head, a micromachine, etc.).
- a device a semiconductor chip such as an IC or LSI, a liquid crystal panel, a CCD, a thin film magnetic head, a micromachine, etc.
- step 201 design step
- step 202 mask manufacturing step
- a mask on which the designed circuit pattern is formed is manufactured.
- step 203 wafer manufacturing step
- a wafer manufacturing step a wafer is manufactured using a material such as silicon.
- step 204 wafer processing step
- step 204 wafer processing step
- step 205 device assembly step
- Step 205 includes processes such as a dicing process, a bonding process, and a packaging process (chip sealing) as necessary.
- step 206 the device created in step 205 Perform inspections such as operation check tests and durability tests. After these steps, the device is completed and shipped.
- FIG. 14 shows a detailed flow example of step 204 in the semiconductor device.
- step 211 oxidation step
- step 212 CVD step
- step 213 electrode formation step
- step 214 ion implantation step
- ions are implanted into Ueno.
- the post-processing step is executed as follows.
- step 215 resist formation step
- step 216 exposure step
- step 217 development step
- step 218 etching step
- step 219 resist removal step
- the exposure apparatus of the above-described embodiment is used in the exposure step (step 216). Therefore, high-throughput exposure is performed while maintaining high overlay accuracy. It can be carried out. Therefore, the productivity of highly integrated micro devices on which fine patterns are formed can be improved.
- the moving body unit of the present invention is suitable for moving two moving bodies that can move independently in a predetermined uniaxial direction.
- the exposure apparatus and device manufacturing method of the present invention are suitable for manufacturing electronic devices such as semiconductor elements (integrated circuits) and liquid crystal display elements.
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- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Environmental & Geological Engineering (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Toxicology (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05809699A EP1840943A4 (en) | 2004-11-25 | 2005-11-24 | MOBILE BODY SYSTEM, EXPOSURE DEVICE AND METHOD FOR MANUFACTURING COMPONENTS |
JP2006547803A JP4807629B2 (ja) | 2004-11-25 | 2005-11-24 | 露光装置及びデバイス製造方法 |
KR1020127017807A KR101280166B1 (ko) | 2004-11-25 | 2005-11-24 | 이동체 시스템, 노광 장치 및 디바이스 제조 방법 |
US11/791,335 US20080123067A1 (en) | 2004-11-25 | 2005-11-24 | Movable Body System, Exposure Apparatus, And Device Manufacturing Method |
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JP2004-340202 | 2004-11-25 | ||
JP2004340202 | 2004-11-25 |
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PCT/JP2005/021512 WO2006057263A1 (ja) | 2004-11-25 | 2005-11-24 | 移動体システム、露光装置及びデバイス製造方法 |
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US (1) | US20080123067A1 (ja) |
EP (1) | EP1840943A4 (ja) |
JP (1) | JP4807629B2 (ja) |
KR (2) | KR101280166B1 (ja) |
CN (2) | CN101576716A (ja) |
TW (1) | TWI424273B (ja) |
WO (1) | WO2006057263A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
CN1993803A (zh) | 2007-07-04 |
KR101261063B1 (ko) | 2013-05-06 |
CN101576716A (zh) | 2009-11-11 |
JPWO2006057263A1 (ja) | 2008-06-05 |
KR20120087190A (ko) | 2012-08-06 |
JP4807629B2 (ja) | 2011-11-02 |
TWI424273B (zh) | 2014-01-21 |
TW200632574A (en) | 2006-09-16 |
EP1840943A4 (en) | 2010-04-21 |
CN100490066C (zh) | 2009-05-20 |
EP1840943A1 (en) | 2007-10-03 |
US20080123067A1 (en) | 2008-05-29 |
KR101280166B1 (ko) | 2013-06-28 |
KR20070085212A (ko) | 2007-08-27 |
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