WO2017094770A1 - 露光装置、露光システム、基板処理方法、および、デバイス製造装置 - Google Patents
露光装置、露光システム、基板処理方法、および、デバイス製造装置 Download PDFInfo
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- WO2017094770A1 WO2017094770A1 PCT/JP2016/085533 JP2016085533W WO2017094770A1 WO 2017094770 A1 WO2017094770 A1 WO 2017094770A1 JP 2016085533 W JP2016085533 W JP 2016085533W WO 2017094770 A1 WO2017094770 A1 WO 2017094770A1
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- pattern
- exposure
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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
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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
- G03F7/70058—Mask illumination systems
- G03F7/70208—Multiple illumination paths, e.g. radiation distribution devices, microlens illumination systems, multiplexers or demultiplexers for single or multiple projection systems
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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
- G03F7/70275—Multiple projection paths, e.g. array of projection systems, microlens projection systems or tandem projection systems
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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
- G03F7/70483—Information management; Active and passive control; Testing; Wafer monitoring, e.g. pattern monitoring
- G03F7/70605—Workpiece metrology
- G03F7/70616—Monitoring the printed patterns
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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
- G03F7/70775—Position control, e.g. interferometers or encoders for determining the stage position
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F9/00—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically
- G03F9/70—Registration or positioning of originals, masks, frames, photographic sheets or textured or patterned surfaces, e.g. automatically for microlithography
- G03F9/7073—Alignment marks and their environment
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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
- H01L21/67—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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
Definitions
- the present invention relates to an exposure apparatus that exposes a pattern for an electronic device onto a sheet substrate, an exposure system, a substrate processing method, and a device manufacturing apparatus.
- Japanese Patent Laid-Open No. 10-303125 discloses an optical stepper (exposure apparatus using a mask substrate) having a high throughput when transferring a device pattern on a single substrate, and an electron having an excellent resolution exceeding light. It is disclosed that a rough pattern portion of an electronic device is exposed by an optical stepper and a fine pattern portion is exposed by an electron beam exposure device using both the beam exposure apparatus and the beam exposure apparatus.
- an electronic device including any of a display element, a sensor electrode, a thin film transistor, an IC chip, a light emitting element, a wiring layer, and the like.
- a process of forming device elements on a flexible substrate is used. This process may also include a lithography process in which pattern exposure is performed using an exposure apparatus on a photosensitive layer on a flexible substrate made of plastic, polymer resin, or the like.
- lithography process in which pattern exposure is performed using an exposure apparatus on a photosensitive layer on a flexible substrate made of plastic, polymer resin, or the like.
- an exposure apparatus that conveys a flexible long sheet substrate along a longitudinal direction to expose a pattern for an electronic device on the sheet substrate.
- Mark detection unit for detecting mark position information of a plurality of marks formed thereon, and design information of the pattern for exposing the pattern to a device formation region on the sheet substrate on which the electronic device is to be formed
- the first pattern exposure unit that adjusts and projects the energy line corresponding to the position based on the mark position information, the adjustment information on the position adjustment of the energy line projected on the device formation region, and the mark position information
- An output unit for outputting a mask pattern corresponding to the pattern to be exposed in the device formation region, Provided.
- an exposure system that conveys a flexible long sheet substrate along a longitudinal direction to expose a pattern for an electronic device on the sheet substrate.
- the design information is corrected on the basis of at least one of the adjustment information and the mark position information output from the exposure apparatus according to the above aspect, and the pattern corresponding to the pattern to be exposed in the device formation region
- a mask creating apparatus that creates the mask pattern using an actual pattern information generating unit that generates actual pattern information for creating a mask pattern, and a third pattern exposure unit that projects an energy beam based on design information;
- the mask creating apparatus holds a mask substrate on which the mask pattern is formed, and uses the actual pattern information as the design information as the third pattern. It is given to the optical unit, by projecting the energy beam corresponding to the actual pattern information to the mask substrate to form said mask pattern corresponding to the actual pattern information on a substrate for the mask.
- a substrate processing method in which a flexible long sheet substrate is transported along a longitudinal direction, and a pattern for an electronic device is exposed on the sheet substrate.
- the sheet substrate on which the electronic device is to be formed by a detection step of detecting mark position information of a plurality of marks formed on the sheet substrate and a first pattern exposure unit that projects energy rays according to design information A first exposure step of projecting the energy line corresponding to the design information of the pattern on the upper device formation area based on the mark position information; and the energy line projected on the device formation area
- a mask pattern to be exposed in the device formation area based on at least one of adjustment information relating to position adjustment, the mark position information, and the design information Comprising a generation step of generating a real pattern information to be used for creation of down, the.
- a plurality of exposure units that irradiate the sheet substrate with exposure light corresponding to a pattern of an electronic device while conveying a flexible long substrate in the longitudinal direction.
- the plurality of exposure units are arranged along a transport direction of the substrate, and each of the plurality of exposure units is an exposure light according to a pattern of the electronic device.
- a substrate support member having a support surface that supports the substrate to which the substrate is irradiated while being curved in the transport direction, and the plurality of exposure units are configured to expose the pattern onto the substrate by different exposure methods. Has been.
- FIG. 5A is a plan view of the illumination area on the cylindrical mask held by the rotary holding drum as seen from the ⁇ Z direction side
- FIG. 5B is the projection area on the irradiated surface of the substrate supported by the rotary drum on the + Z direction side. It is the top view seen.
- FIG. It is a figure which shows another example of a structure of the 2nd pattern exposure part shown in FIG. It is a figure which shows the structure of the exposure system for mask preparation in 1st Embodiment. It is a figure which shows the structure of the exposure apparatus in the modification 1. It is a figure which shows the state at the time of maskless exposure, showing the arrangement
- FIG. 1 is a schematic configuration diagram of a device manufacturing system 10 including an exposure apparatus EX that performs an exposure process on a substrate (object to be irradiated) P in the first embodiment.
- EX an exposure apparatus
- a substrate object to be irradiated
- an XYZ orthogonal coordinate system is set, and the X direction, the Y direction, and the Z direction will be described according to the arrows shown in the figure.
- the device manufacturing system 10 is a manufacturing system incorporated in a manufacturing line for manufacturing a flexible display as an electronic device, for example.
- Examples of the flexible display include an organic EL display and a liquid crystal display.
- the device manufacturing system 10 sends a substrate P from a supply roll (not shown) obtained by winding a flexible sheet-like substrate (sheet substrate) P in a roll shape, and continuously performs various processes on the sent substrate P. After the application, the substrate P after various treatments is wound up by a collection roll (not shown), which has a so-called roll-to-roll structure.
- the substrate P has a belt-like shape in which the transport direction of the substrate P is the longitudinal direction (long) and the width direction is the short direction (short).
- the substrate P after various treatments is in a state in which the formation regions (exposure regions) of the plurality of electronic devices are continuous along the longitudinal direction, and is a so-called multi-sided substrate.
- the substrate P sent from the supply roll is sequentially subjected to various processes by the process apparatus PR1, the exposure apparatus EX, the process apparatus PR2, and the like, and is taken up by the collection roll.
- one or a plurality of display panels are formed in one exposure region on the flexible substrate P.
- a color filter, an alignment film, or a flexible multilayer wiring film (long wiring harness) may be formed.
- the X direction is a direction from the process apparatus PR1 to the process apparatus PR2 through the exposure apparatus EX in a horizontal plane.
- the Y direction is a direction orthogonal to the X direction in the horizontal plane, and is the width direction of the substrate P.
- the Z direction is a direction (upward direction) orthogonal to the X direction and the Y direction, and the ⁇ Z direction is parallel to the direction in which gravity acts.
- a resin film or a foil (foil) made of a metal or alloy such as stainless steel is used.
- the material of the resin film include polyethylene resin, polypropylene resin, polyester resin, ethylene vinyl copolymer resin, polyvinyl chloride resin, cellulose resin, polyamide resin, polyimide resin, polycarbonate resin, polystyrene resin, and vinyl acetate resin. Among them, one containing at least one or more may be used. Further, the thickness and rigidity (Young's modulus) of the substrate P may be in a range that does not cause folds or irreversible wrinkles due to buckling in the substrate P when passing through the transport path of the exposure apparatus EX.
- a film such as PET (polyethylene terephthalate) or PEN (polyethylene naphthalate) having a thickness of about 25 ⁇ m to 200 ⁇ m is typical of a suitable sheet substrate.
- the substrate P may receive heat in each process performed by the process apparatus PR1, the exposure apparatus EX, and the process apparatus PR2, it is preferable to select the substrate P made of a material that does not have a significantly large thermal expansion coefficient.
- the thermal expansion coefficient can be suppressed by mixing an inorganic filler with a resin film.
- the inorganic filler may be, for example, titanium oxide, zinc oxide, alumina, or silicon oxide.
- the substrate P may be a single layer of ultrathin glass having a thickness of about 100 ⁇ m manufactured by a float process or the like, or a laminate in which the above resin film, foil, or the like is bonded to the ultrathin glass. It may be.
- the flexibility of the substrate P refers to the property that the substrate P can be bent without being sheared or broken even when a force of its own weight is applied to the substrate P.
- flexibility includes a property of bending by a force of about its own weight.
- the degree of flexibility varies depending on the material, size, and thickness of the substrate P, the layer structure formed on the substrate P, the environment such as temperature and humidity, and the like. In any case, when the substrate P is correctly wound around various conveyance rollers, rotary drums, and other members for conveyance direction provided in the conveyance path in the device manufacturing system 10 according to the present embodiment, the substrate P buckles and folds. If the substrate P can be smoothly transported without being damaged or broken (breaking or cracking), it can be said to be in the range of flexibility.
- the process apparatus PR1 performs a pre-process on the substrate P while continuously transporting the substrate P to be exposed by the exposure apparatus EX to the + X direction side along the longitudinal direction.
- the substrate P on which the pre-process has been performed is transported toward the exposure apparatus EX.
- the substrate P sent to the exposure apparatus EX by this pre-process is a substrate (photosensitive substrate) P having a photosensitive functional layer (photosensitive layer) formed on the surface thereof.
- This photosensitive functional layer is applied as a solution on the substrate P and dried to form a layer (film).
- a typical photosensitive functional layer is a photoresist, but a photosensitive silane coupling agent (SAM) that is modified in the lyophilicity of a portion irradiated with ultraviolet rays as a material that does not require development processing.
- SAM photosensitive silane coupling agent
- the pattern portion exposed to ultraviolet rays on the substrate P is modified from lyophobic to lyophilic.
- a pattern layer is formed by selectively applying a conductive ink (ink containing conductive nanoparticles such as silver or copper) or a liquid containing a semiconductor material on the lyophilic portion.
- a conductive ink ink containing conductive nanoparticles such as silver or copper
- a liquid containing a semiconductor material on the lyophilic portion.
- the plating reducing group is exposed to the pattern portion exposed to ultraviolet rays on the substrate P. Therefore, after exposure, the substrate P is immediately immersed in a plating solution containing palladium ions or the like for a certain period of time, so that a pattern layer of palladium is formed (deposited).
- Such a plating process is an additive process.
- the substrate P sent to the exposure apparatus EX has a base material of PET or the like.
- PEN may be formed by depositing a metallic thin film such as aluminum (Al) or copper (Cu) on the entire surface or selectively, and further laminating a photoresist layer thereon.
- the exposure apparatus EX continuously transports the substrate P transported from the process apparatus PR1 along the longitudinal direction to the + X direction side, while the surface to be irradiated (photosensitive surface) of the substrate P on which the photosensitive functional layer is formed. ), A predetermined pattern such as a display circuit or wiring is exposed. Thereby, a latent image corresponding to the exposed predetermined pattern is formed on the photosensitive functional layer of the substrate P. Since the substrate P is continuously transported along the transport direction, a plurality of exposure regions W where the pattern is exposed by the exposure apparatus EX are provided at predetermined intervals along the longitudinal direction of the substrate P (see FIG. (See FIG. 3). Since an electronic device is formed in the exposure area W, the exposure area W is also a device formation area. Since the electronic device is configured by overlapping a plurality of pattern layers (layers on which patterns are formed), a pattern corresponding to each layer is exposed by the exposure apparatus EX.
- the process apparatus PR2 continuously processes the substrate P exposed by the exposure apparatus EX to the + X direction side along the longitudinal direction, and performs subsequent processing (for example, plating or development) on the substrate P. -Etching treatment etc.). By this subsequent process, a pattern layer corresponding to the latent image is formed on the substrate P.
- each process of the device manufacturing system 10 as shown in FIG. 1 must be performed at least twice.
- a pattern layer can be laminated
- the substrate P after processing is in a state in which a plurality of electronic devices or regions where specific pattern layers of the electronic devices are formed are connected along the longitudinal direction of the substrate P with a predetermined interval.
- the collection roll that collects the substrate P formed in a state where the electronic devices are connected may be mounted on a dicing apparatus (not shown).
- the dicing apparatus equipped with the collection roll divides the processed substrate P for each electronic device (dicing) to form a plurality of electronic devices.
- the dimension in the width direction (short direction) is about 10 cm to 2 m
- the dimension in the length direction (long direction) is 10 m or more.
- substrate P is not limited to an above-described dimension.
- the exposure apparatus EX is stored in the temperature control chamber ECV.
- This temperature control chamber ECV keeps the inside at a predetermined temperature, thereby suppressing the shape change due to the temperature of the substrate P transported inside.
- the temperature control chamber ECV is arranged on the installation surface E of the manufacturing factory via passive or active vibration isolation units SU1, SU2.
- the anti-vibration units SU1 and SU2 reduce vibration from the installation surface E.
- the installation surface E may be a surface on the installation base or a floor.
- the exposure apparatus EX includes a substrate transport mechanism 12, a first pattern exposure unit (exposure unit) EXH1, a second pattern exposure unit (exposure unit) EXH2, a control unit 14, and a plurality of alignment microscopes ALG (ALG1 to ALG1). ALG4).
- the control device 14 controls each part of the exposure apparatus EX (the substrate transport mechanism 12, the first pattern exposure part EXH1, the second pattern exposure part EXH2, the alignment microscope ALG, etc.).
- the control device 14 includes a computer and a storage medium that stores a program, pattern data, and the like, and functions as the control device 14 of the present embodiment when the computer executes the program.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are provided above (on the + Z direction side) the rotary drum DR of the substrate transport mechanism 12.
- the substrate transport mechanism (transport device) 12 transports the substrate P transported from the process device PR1 to the process device PR2 at a predetermined speed.
- the substrate transport mechanism 12 defines a transport path for the substrate P transported in the exposure apparatus EX.
- the substrate transport mechanism 12 includes an edge position controller EPC, a driving roller R1, a tension adjusting roller RT1, a rotating drum (cylindrical drum) DR, a tension adjusting roller RT2, in order from the upstream side ( ⁇ X direction side) in the transport direction of the substrate P.
- a driving roller R2 and a driving roller R3 are provided.
- the edge position controller EPC adjusts the position in the width direction (the Y direction and the short direction of the substrate P) of the substrate P transported from the process apparatus PR1.
- the edge position controller EPC has a position at the end (edge) in the width direction of the substrate P that is transported in a state where a predetermined tension is applied with respect to the target position from about ⁇ 10 to several tens of ⁇ m.
- the position of the substrate P in the width direction is adjusted by moving the substrate P in the width direction so that it falls within this range (allowable range).
- the edge position controller EPC has an edge sensor (edge detection unit) (not shown) that detects the position of the edge (edge) in the width direction of the substrate P, and based on the detection signal detected by the edge sensor, Adjust the position in the width direction.
- the driving roller R1 rotates while holding both front and back surfaces of the substrate P conveyed from the edge position controller EPC, and conveys the substrate P toward the rotating drum DR.
- the edge position controller EPC adjusts the position in the width direction of the substrate P so that the longitudinal direction of the substrate P conveyed to the rotating drum DR is orthogonal to the central axis AXo of the rotating drum DR.
- the rotating drum DR has a central axis AXo extending in the Y direction and extending in a direction intersecting with the direction in which gravity works, and a cylindrical outer peripheral surface having a constant radius from the central axis AXo, and an outer peripheral surface (circumferential surface).
- the substrate P is transported in the transport direction (sub-scanning direction) by rotating around the central axis AXo.
- shafts Sft supported by bearings so as to rotate around the central axis AXo are provided on both sides in the Y direction of the rotating drum DR.
- the shaft Sft rotates about the central axis AXo when a rotational torque from a rotation driving source (not shown) (for example, a motor or a speed reduction mechanism) controlled by the control device 14 is applied.
- the driving rollers R2 and R3 are arranged at a predetermined interval along the + X direction, and give a predetermined slack (play) to the substrate P after exposure. Similarly to the drive roller R1, the drive rollers R2 and R3 rotate while holding both front and back surfaces of the substrate P, and transport the substrate P toward the process apparatus PR2.
- the driving rollers R2 and R3 are provided on the downstream side (+ X direction side) in the transport direction with respect to the rotating drum DR.
- the driving roller R2 is located on the upstream side ( ⁇ X in the transport direction) with respect to the driving roller R3. (Direction side).
- the tension adjusting rollers RT1 and RT2 are urged in the ⁇ Z direction, and apply a predetermined tension in the longitudinal direction to the substrate P that is wound around and supported by the rotary drum DR.
- the longitudinal tension applied to the substrate P applied to the rotating drum DR is stabilized within a predetermined range.
- the control device 14 rotates the driving rollers R1 to R3 by controlling a rotation driving source (not shown) (for example, a motor, a speed reduction mechanism, etc.).
- the driving speed of the substrate P supported by the rotating drum DR that is, the speed in the sub-scanning direction of the substrate P is defined by the rotational speeds of the driving rollers R1 and R2 and the rotating drum DR.
- the first pattern exposure unit EXH1 exposes a pattern by a direct drawing method that does not use a mask, a so-called raster scan method.
- the first pattern exposure unit EXH1 projects the spot light SP of the beam LB, which is an energy beam for exposure, onto the exposure area W of the substrate P that is supported while being transported by the rotary drum DR.
- SP energy beam
- SP is scanned one-dimensionally (main scanning) in the main scanning direction (Y direction) on the substrate P (on the irradiated surface of the substrate P).
- the first pattern exposure unit EXH1 modulates the intensity of the spot light SP scanned in the main scanning direction at a high speed (on / off) according to pattern data (drawing data) that is design information of a pattern to be drawn. )
- pattern data drawing data
- a light pattern corresponding to a predetermined pattern such as a display circuit or wiring is drawn and exposed on the irradiated surface of the substrate P. That is, the spot light SP is relatively two-dimensionally scanned on the irradiated surface of the substrate P by the sub-scanning of the substrate P and the main scanning of the spot light SP, and a predetermined pattern is formed in the exposure region W of the substrate P. Drawing exposure.
- the first pattern exposure unit EXH1 includes a light source device 20, a plurality of light introducing optical systems BDU (BDU1 to BDU6), and a plurality of scanning units U (U1 to U6).
- the light source device 20 has a pulse light source and emits a pulsed beam (pulse light, laser) LB.
- This beam LB is ultraviolet light having a peak wavelength in a wavelength band of 370 nm or less, and the emission frequency of the beam LB is Fe.
- the light source device 20 can be a fiber amplifier laser light source capable of oscillating a high-luminance pulse beam at a high emission frequency Fe in the ultraviolet wavelength region.
- the fiber amplifier laser light source is a semiconductor laser in the infrared wavelength region that emits pulses at a high frequency of 100 MHz or higher, a fiber amplifier that amplifies pulse light in the infrared wavelength region, and ultraviolet light that is amplified in the infrared wavelength region. It is comprised with the wavelength conversion element (harmonic generation element) converted into the pulsed light of a wavelength range. Pulsed light in the infrared wavelength region from a semiconductor laser is also called seed light. By changing the emission characteristics of the seed light (pulse duration, steepness of rise and fall, etc.), amplification efficiency (amplification factor) in the fiber amplifier ) Can be changed, and the intensity of the pulse beam in the ultraviolet wavelength region finally output can be modulated at high speed.
- the pulsed beam in the ultraviolet wavelength region outputted from the fiber amplifier laser light source can have a very short emission duration of several picoseconds to several tens of picoseconds. Therefore, even in the raster scan method, the spot light SP generated by the pulsed light emission of the pulse beam hardly fluctuates on the irradiated surface of the substrate P, and the shape and intensity distribution in the beam cross section (for example, , Circular Gaussian distribution).
- the first pattern exposure unit EXH1 is a so-called multi-beam pattern exposure unit by including a plurality of scanning units U (U1 to U6) having the same configuration.
- the plurality of scanning units U (U1 to U6) are arranged in two rows in the circumferential direction of the rotary drum DR with a center plane Poc1 described later interposed therebetween.
- the odd-numbered scanning units U1, U3, and U5 are arranged in a line along the Y direction on the upstream side in the transport direction of the substrate P with respect to the center plane Poc1.
- the even-numbered scanning units U2, U4, U6 are arranged in a line along the Y direction on the downstream side in the transport direction of the substrate P with respect to the center plane Poc1.
- Each scanning unit U projects the spot light SP onto the irradiated surface of the substrate P, and the spot light SP is projected on the irradiated surface of the substrate P on a predetermined drawing line (scanning) extending in the Y direction.
- Line) Scan one dimension along SL.
- the drawing line SL of each scanning unit U U1 to U6
- the drawing line SL scanned with the spot light SP by the scanning unit U1 is denoted by SL1
- the spot light is scanned by the scanning units U2 to U6.
- the drawing lines SL scanned by the SP are represented by SL2 to SL6.
- the position of the spot light SP irradiated on the irradiated surface of the substrate P by the scanning units U1, U3, U5 is the same position in the transport direction of the substrate P, that is, one row along the Y direction.
- the positions of the spot lights SP irradiated on the irradiated surface of the substrate P by the even-numbered scanning units U2, U4, and U6 are the same position in the transport direction of the substrate P, that is, one row along the Y direction.
- the position of the spot light SP irradiated on the irradiated surface of the substrate P by the scanning units U1, U3, U5 and the irradiated surface of the substrate P by the scanning units U2, U4, U6 are the same position in the transport direction of the substrate P, that is, one row along the Y direction.
- a surface extending in the Y direction through the center point of the position of the spot light SP irradiated on and the center axis AXo of the rotary drum DR is defined as a center surface Poc1.
- the direction perpendicular to the Y direction on the center plane Poc1 is Z1 ′
- the direction orthogonal to the center plane Poc1 is X1 ′.
- the ⁇ Z1 ′ direction is the direction in which gravity acts
- the + X1 ′ direction is the transport direction side of the substrate P.
- the odd-numbered scanning units U1, U3, and U5 and the even-numbered scanning units U2, U4, and U6 are disposed so as to be symmetric with respect to the center plane Poc1 with respect to the X1 ′ direction.
- each scanning unit U (U1 to U6) can draw a pattern for each of a plurality of regions divided in the width direction of the substrate P.
- the scanning length in the Y direction (the length of the drawing line SL) by one scanning unit U is about 20 to 50 mm
- the odd numbered scanning units U1, U3, U5 and the even numbered scanning unit U2 , U4, and U6 a total of six scanning units U are arranged in the Y direction, so that the Y direction width that can be drawn is increased to about 120 to 300 mm.
- the lengths of the drawing lines SL1 to SL6 are the same. That is, the scanning distance of the spot light SP of the beam LB scanned along each of the drawing lines SL1 to SL6 is basically the same. Note that when it is desired to increase the width of the exposure region W, it is possible to increase the length of the drawing line SL itself or increase the number of scanning units U arranged in the Y direction.
- the drawing lines SL are arranged in two rows in the circumferential direction of the rotary drum DR with the center plane Poc1 interposed therebetween.
- the odd-numbered drawing lines SL1, SL3, and SL5 are located on the irradiated surface of the substrate P on the upstream side ( ⁇ X direction side) in the transport direction of the substrate P with respect to the center plane Poc1.
- the even-numbered drawing lines SL2, SL4, and SL6 are positioned on the surface to be irradiated on the substrate P on the downstream side (+ X direction side) in the transport direction of the substrate P with respect to the center plane Poc1.
- the drawing lines SL1 to SL6 are substantially parallel to the width direction (Y direction) of the substrate P.
- the drawing lines SL1, SL3, and SL5 are arranged on a straight line at a predetermined interval along the width direction (scanning direction) of the substrate P.
- the drawing lines SL2, SL4, and SL6 are arranged on a straight line at a predetermined interval along the width direction (scanning direction) of the substrate P.
- the drawing line SL2 is arranged between the drawing line SL1 and the drawing line SL3 in the width direction of the substrate P.
- the drawing line SL3 is arranged between the drawing line SL2 and the drawing line SL4 in the width direction of the substrate P.
- the drawing line SL4 is arranged between the drawing line SL3 and the drawing line SL5 with respect to the width direction of the substrate P, and the drawing line SL5 is arranged between the drawing line SL4 and the drawing line SL6 with respect to the width direction of the substrate P.
- the scanning direction of the spot light SP of the beam LB scanned along the drawing lines SL1, SL3, SL5 is set to the ⁇ Y direction, and the beam LB scanned along the drawing lines SL2, SL4, SL6.
- the scanning direction of the spot light SP be the + Y direction.
- the configuration of the scanning unit U (U1 to U6) will be described with reference to FIG. Since the scanning units U (U1 to U6) have the same configuration, only the scanning unit U1 will be described, and description of the scanning units U2 to U6 will be omitted.
- the description of the scanning unit U1 will be made using the XtYZt orthogonal coordinate system.
- the Zt direction is parallel to the traveling direction of the beam LB irradiated to the substrate P from the scanning unit U1
- the Xt direction is a direction orthogonal to the YZt plane.
- the ⁇ Zt direction is the direction in which gravity acts
- the + Xt direction is the transport direction side of the substrate P.
- the scanning unit U1 includes cylindrical lenses CYa and CYb, a polygon mirror PM, an f ⁇ lens FT, and an optical path defining member RG that appropriately bends the optical path of the beam LB.
- the optical path defining member RG has a plurality of reflection mirrors and the like.
- the cylindrical lenses CYa and CYb, the polygon mirror PM, and the f ⁇ lens FT are provided on the optical path of the beam LB defined by the optical path defining member RG.
- the beam LB incident from the light introducing optical system BDU1 enters the polygon mirror PM.
- the polygon mirror PM reflects the incident beam LB toward the f ⁇ lens FT.
- the polygon mirror PM deflects and reflects the incident beam LB in order to scan the spot light SP irradiated on the irradiated surface of the substrate P.
- the polygon mirror PM is a rotary polygon mirror having a rotation axis AXp extending in the Zt direction and a plurality of reflecting surfaces formed around the rotation axis AXp.
- the reflection direction (deflection direction) of the beam LB is continuously changed by one of the reflection surfaces, and the spot light SP of the beam LB irradiated on the irradiated surface of the substrate P is drawn on the drawing line SL1 (see FIG. 3). ) Is scanned along the top.
- the polygon mirror PM is rotated at a constant speed by a polygon driving unit (not shown) including a motor and the like under the control of the control device 14.
- a cylindrical lens CYa is provided in front of the polygon mirror PM with respect to the traveling direction of the beam LB. Therefore, the beam LB enters the polygon mirror PM after passing through the cylindrical lens CYa. Even when the reflection surface of the polygon mirror PM is inclined with respect to the Zt direction by the cylindrical lens CYa whose bus line is parallel to the Y direction (when there is an inclination of the reflection surface with respect to the normal line of the XtY plane). The effect can be suppressed. For example, the irradiation position of the spot light SP of the beam LB irradiated on the irradiated surface of the substrate P is prevented from shifting in the Xt direction.
- the f ⁇ lens FT is a telecentric scan lens that transmits the beam LB from the polygon mirror PM so as to be parallel to the optical axis of the f ⁇ lens FT on the XtY plane.
- the optical axis of the f ⁇ lens FT is parallel to the Xt direction.
- the beam LB that has passed through the f ⁇ lens FT passes through the cylindrical lens CYb and is projected onto the irradiated surface of the substrate P.
- the cylindrical lens CYb in which the generatrix is parallel to the Y direction causes the beam LB projected onto the substrate P to be a minute spot light SP having a diameter of about several ⁇ m (for example, 3 ⁇ m) on the irradiated surface of the substrate P. Converged.
- the spot light SP projected onto the irradiated surface of the substrate P is scanned along the drawing line SL1 extending in the main scanning direction by the polygon mirror PM.
- the polygon mirror PM is irradiated so that the spot light SP is irradiated along the drawing line SL1 while overlapping the spot light SP by a predetermined amount (for example, 1/2 of the diameter of the spot light SP, that is, 1.5 ⁇ m).
- the rotational speed and the light emission frequency Fe of the light source device 20 are defined.
- the incident angle ⁇ b of the beam LB to the f ⁇ lens FT varies depending on the rotation angle position (range of ⁇ b / 2) of the polygon mirror PM.
- the f ⁇ lens FT projects the spot light SP of the beam LB onto the image height position on the irradiated surface of the substrate P proportional to the incident angle ⁇ b.
- the focal length is f and the image height position is y
- the incident angle ⁇ b of the beam LB to the f ⁇ lens FT is 0 degree, the beam LB incident on the f ⁇ lens FT travels along the optical axis of the f ⁇ lens FT.
- the optical axis of the beam LB irradiated from the scanning unit U1 to an arbitrary point (for example, the middle point) on the drawing line SL1 is defined as an irradiation axis Le1.
- the optical axes of the beam LB irradiated from the scanning units U2 to U6 to arbitrary points (for example, the middle points) on the drawing lines SL2 to SL6 are set as irradiation axes Le2 to Le6.
- Each irradiation axis Le (Le1 to Le6) is a line connecting the drawing line SL (SL1 to SL6) and the central axis AXo on the X1′Z1 ′ plane (XZ plane).
- each of the scanning units U emits the beam LB so as to be orthogonal to the irradiated surface of the substrate P with respect to the X1′Z1 ′ plane (XZ plane). That is, each of the scanning units U (U1 to U6) irradiates the beam LB toward the central axis AXo of the rotary drum DR with respect to the X1′Z1 ′ plane (XZ plane).
- the irradiation axes Le1, Le3, Le5 are in the same direction in the X1′Z1 ′ plane (XZ plane), and the irradiation axes Le2, Le4, Le6 are in the same direction in the X1′Z1 ′ plane (XZ plane).
- the irradiation axes Le1, Le3, Le5 and the irradiation axes Le2, Le4, Le6 are set so that the angle with respect to the center plane Poc1 is ⁇ ⁇ . (See FIG. 2).
- the plurality of light introducing optical systems BDU guide the beam LB from the light source device 20 to the plurality of scanning units U (U1 to U6).
- the light introducing optical system BDU1 guides the beam LB to the scanning unit U1
- the light introducing optical system BDU2 guides the beam LB to the scanning unit U2.
- the light introducing optical systems BDU3 to BDU6 guide the beam LB to the scanning units U3 to U6.
- the light introducing optical system BDU (BDU1 to BDU6) emits the beam LB along the irradiation axis Le (Le1 to Le6) to the scanning unit U (U1 to U6).
- the beam LB guided from the light introducing optical system BDU1 to the scanning unit U1 passes on the irradiation axis Le1.
- the beams LB guided from the light introducing optical systems BDU2 to BDU6 to the scanning units U2 to U6 pass on the irradiation axes Le2 to Le6.
- the beam LB from the light source device 20 is divided into six beams LB by a beam splitter, a reflection mirror, etc. (not shown) and enters each light introducing optical system BDU (BDU1 to BDU6).
- the plurality of light introducing optical systems BDU are optical elements for drawing AOM that rapidly modulate (on / off) the intensity of the beam LB guided to the plurality of scanning units U (U1 to U6) according to the pattern data.
- the light introducing optical system BDU1 has a drawing optical element AOM1, and similarly, the light introducing optical systems BDU2 to BDU6 have drawing optical elements AOM2 to AOM6.
- the drawing optical elements AOM (AOM1 to AOM6) are acousto-optic modulators that are transmissive to the beam LB.
- the drawing optical elements AOM (AOM1 to AOM6) generate first-order diffracted light that diffracts the beam LB from the light source device 20 at a diffraction angle corresponding to the frequency of the high-frequency signal as a drive signal, and the first-order diffracted light is generated.
- the beam LB is emitted toward each scanning unit U (U1 to U6).
- the drawing optical elements AOM (AOM1 to AOM6) turn on / off the generation of the first-order diffracted light diffracted from the incident beam LB in accordance with the on / off of the drive signal (high frequency signal) from the control device 14.
- the drawing optical elements AOM (AOM1 to AOM6) transmit the incident beam LB without being diffracted when the drive signal (high-frequency signal) from the control device 14 is off, so that the light introducing optical system BDU is transmitted.
- the beam LB is guided to an absorber (not shown) provided in (BDU1 to BDU6). Therefore, when the drive signal is off, the beam LB that has passed through the drawing optical element AOM (AOM1 to AOM6) does not enter the scanning unit U (U1 to U6). That is, the intensity of the beam LB passing through the scanning unit U (U1 to U6) becomes a low level (zero).
- the drawing optical elements AOM diffract the incident beam LB and emit the first-order diffracted light when the drive signal (high-frequency signal) from the control device 14 is on.
- the beam LB is guided to the scanning unit U (U1 to U6). Therefore, when the drive signal is on, the intensity of the beam LB passing through the scanning unit U (U1 to U6) becomes high.
- the drawing optical elements AOM (AOM1 to AOM6), the drawing optical elements AOM (AOM1 to AOM6) can be switched on / off.
- the pattern data is provided for each of the scanning units U (U1 to U6), and the control device 14 uses the pattern data (for example, one predetermined pixel unit) drawn by each scanning unit U (U1 to U6).
- the pattern data is obtained by dividing the pattern drawn by each scanning unit U into pixels having dimensions set according to the size of the spot light SP, and each of the plurality of pixels is divided. This is expressed by logical information (pixel data) corresponding to the pattern. That is, the direction along the scanning direction (main scanning direction, Y direction) of the spot light is the row direction, and the direction along the transport direction (sub-scanning direction, X direction, X1 ′ direction) of the substrate P is the column direction.
- the bitmap data is composed of a plurality of pixel data decomposed two-dimensionally. This pixel data is 1-bit data of “0” or “1”.
- the pixel data “0” means that the intensity of the spot light SP irradiated on the substrate P is set to a low level, and the pixel data “1” is a level where the intensity of the spot light SP irradiated on the substrate P is high. That means Accordingly, when the pixel data is “0”, the control device 14 turns off the drive signal applied to the drawing optical element AOM, and applies the drawing signal to the drawing optical element AOM when the pixel data is “1”. The drive signal is turned on. Pixel data for one column of pattern data corresponds to one drawing line SL (SL1 to SL6), and is projected onto the substrate P along one drawing line SL (SL1 to SL6). The intensity of the spot light SP is modulated according to the pixel data for one column.
- serial data DL This one column of pixel data is called serial data DL. That is, the pattern data is bitmap data in which the first column of serial data DL1, the second column of serial data DL2,..., The nth column of serial data DLn are arranged in the column direction.
- the main body frame UB in FIG. 2 holds a plurality of light introducing optical systems BDU (BDU1 to BDU6) and a plurality of scanning units U (U1 to U6).
- the main body frame UB includes a first frame Ub1 that holds a plurality of light introducing optical systems BDU (BDU1 to BDU6) and a second frame Ub2 that holds a plurality of scanning units U (U1 to U6).
- the first frame Ub1 holds a plurality of light introducing optical systems BDU (BDU1 to BDU6) above the plurality of scanning units U (U1 to U6) held by the second frame Ub2 (on the + Z1 ′ direction side).
- the first frame Ub1 supports a plurality of light introducing optical systems BDU (BDU1 to BDU6) from below ( ⁇ Z1 ′ direction side).
- the odd-numbered light introducing optical systems BDU1, BDU3, and BDU5 correspond to the positions of the odd-numbered scanning units U1, U3, and U5 on the upstream side in the transport direction of the substrate P ( ⁇ X1 ′ direction) with respect to the center plane Poc1
- the first frame Ub1 is supported so as to be arranged in a line along the Y direction.
- the even-numbered light introducing optical systems BDU2, BDU4, and BDU6 correspond to the positions of the even-numbered scanning units U2, U4, and U6, on the downstream side (+ X1 ′ direction side) in the transport direction of the substrate P with respect to the center plane Poc1. ) Is supported by the first frame Ub1 so as to be arranged in a line along the Y direction.
- the first frame Ub1 is provided with a plurality of openings Hs (Hs1 to Hs6) corresponding to the plurality of light introducing optical systems BDU (BDU1 to BDU6).
- the beam LB emitted from each of the plurality of light introducing optical systems BDU (BDU1 to BDU6) is not blocked by the first frame Ub1, and the corresponding scanning unit U ( Incident to U1 to U6).
- the second frame Ub2 is configured so that the scanning units U (U1 to U6) can be rotated by a minute amount (for example, about ⁇ 2 °) around the irradiation axis Le (Le1 to Le6). Is held rotatably. Even when the scanning unit U (U1 to U6) rotates around the irradiation axis Le (Le1 to Le6), the position in the XtY plane where the beam LB enters the scanning unit U (U1 to U6), and The relative positional relationship between the drawing line SL (SL1 to SL6) corresponding to each scanning unit U (U1 to U6) and the center position in the XtY plane does not change.
- a minute amount for example, about ⁇ 2 °
- the scanning unit U (U1 to U6) projects the spot light SP of the beam LB onto the substrate P, while applying the spot light SP to the drawing line. It is possible to scan along SL (SL1 to SL6).
- the rotation of the scanning unit U (U1 to U6) causes the drawing lines SL (SL1 to SL6) to rotate around the irradiation axis Le (Le1 to Le6), so that the drawing lines SL (SL1 to SL6) It can be tilted within a slight range (for example, ⁇ 2 °) with respect to the parallel state.
- the rotation of the scanning unit U (U1 to U6) around the irradiation axis Le (Le1 to Le6) is performed by an actuator (not shown) under the control of the control device 14.
- the alignment microscope ALG (ALG1 to ALG4) of the exposure apparatus EX detects mark position for detecting position information (mark position information) of the alignment marks MK (MK1 to MK4) formed on the substrate P shown in FIG. Which is provided along the Y direction.
- the marks MK (MK1 to MK4) relatively position the predetermined pattern drawn in the exposure area W on the irradiated surface of the substrate P and the layer of the base pattern already formed on the substrate P or the substrate P. This is a reference mark for alignment.
- the alignment microscope ALG (ALG1 to ALG4) images the mark MK (MK1 to MK4) on the substrate P supported by the circumferential surface of the rotary drum DR.
- the alignment microscope ALG (ALG1 to ALG4) is arranged on the upstream side ( ⁇ X direction side) of the transport direction of the substrate P relative to the spot light SP of the beam LB projected onto the irradiated surface of the substrate P from the first pattern exposure unit EXH1. ).
- the alignment microscope ALG (ALG1 to ALG4) has a light source that projects illumination light for alignment onto the substrate P, and an image sensor such as a CCD or CMOS that images the reflected light.
- the imaging signals captured by the alignment microscope ALG (ALG1 to ALG4) are sent to the control device 14.
- the control device 14 detects position information on the substrate P of the mark MK (MK1 to MK4) based on the imaging signal.
- the detection region (imaging range) on the substrate P by this type of alignment microscope ALG is 1 mm square or less, and the position measurement of the mark MK based on the imaging signal (mark displacement amount, etc.) is the detection region. Limited to (imaging range).
- an encoder system that precisely measures the rotation angle position of the rotary drum DR (that is, the movement position and movement amount of the substrate P) is provided and detected by the alignment microscope ALG.
- the measurement information output from the encoder system at the moment when the mark MK is imaged in the region (imaging range) is also sampled. Accordingly, the position of each mark MK (MK1 to MK4) on the substrate P is obtained in association with the rotational angle position of the rotary drum DR.
- the alignment microscope ALG or the alignment microscope ALG and the encoder system correspond to the mark detection unit of the present invention.
- the illumination light for alignment is light in a wavelength region that has little sensitivity to the photosensitive functional layer of the substrate P, for example, light having a wavelength of about 500 to 800 nm.
- the marks MK1 to MK4 are provided around each exposure area W.
- the marks MK (MK1 to MK4) may be formed together when the pattern of the first layer (the underlying layer formed by the first exposure) is formed. For example, when the pattern for the first layer is exposed, the pattern for the marks MK (MK1 to MK4) may be exposed around the exposure area W where the pattern is exposed. Further, the pattern for the mark MK (MK1 to MK4) may be formed on the substrate P before the pattern for the first layer is exposed. In that case, the alignment operation can be performed in consideration of the deformation of the substrate P using the marks MK (MK1 to MK4) from the stage of exposing the pattern for the first layer.
- the mark MK may be formed in the exposure area W. For example, the mark MK (MK1 to MK4) may be formed in the exposure area W and along the outline of the exposure area W.
- Alignment microscope ALG1 images mark MK1 present in observation region (detection region) Vw1.
- the distance in the circumferential direction between the exposure position (drawing lines SL1 to SL6) and the observation region Vw (Vw1 to Vw4) of the alignment microscope ALG (ALG1 to ALG4) is provided to be shorter than the length in the X direction.
- the number and arrangement of alignment microscopes ALG provided in the Y direction can be changed according to the number and arrangement of marks MK formed in the width direction of the substrate P.
- the size of the observation regions Vw1 to Vw4 on the surface to be irradiated of the substrate P is set according to the size of the marks MK1 to MK4 and the alignment accuracy (position measurement accuracy), but is about 100 to 500 ⁇ m square. It is.
- the first pattern exposure unit EXH1 controls the position information of the marks MK (MK1 to MK4) detected using the alignment microscope ALG (ALG1 to ALG4) (actually at the rotation angle position of the rotary drum DR) under the control of the control device 14. Based on the associated position information), the position of the spot light SP corresponding to the design information (pattern data) of the pattern drawn by the scanning unit U (U1 to U6) is adjusted and projected.
- the exposure area W is not inclined or not distorted, a plurality of marks MK (MK1 to MK4) are arranged in a rectangle as shown in FIG. 3, but the exposure area W is inclined or distorted.
- the mark MK (MK1 to MK4) array is inclined or distorted accordingly.
- the position of the spot light SP irradiated on the substrate P needs to be adjusted accordingly.
- the control device 14 adjusts the position of the spot light SP projected on the substrate P by the first pattern exposure unit EXH1 in accordance with the design information based on the position information of the mark MK (MK1 to MK4).
- the control device 14 rotates the scanning unit U (U1 to U6) about the irradiation axis Le (Le1 to Le6) to adjust the inclination angle of each drawing line SL (SL1 to SL6) with respect to the Y direction.
- the position of the spot light SP may be adjusted.
- the ends of the drawing lines SL (SL1 to SL6) adjacent in the Y direction are separated from each other, or the ends overlap each other.
- SL6 is not spliced in the Y direction.
- each drawing line SL (SL1 to SL6) and the drawing lines SL (SL1 to SL6) so that the ends of the adjacent drawing lines SL are joined in the Y direction. It is necessary to correct at least one of the positions in the main scanning direction.
- the scanning length of the drawing lines SL (SL1 to SL6) can be changed by adjusting the magnification of the drawing lines SL (SL1 to SL6) in the main scanning direction.
- the position of the pulsed spot light SP projected on the substrate P in the Y direction is finely adjusted.
- the magnification adjustment in the main scanning direction may be performed by adjusting the light emission frequency Fe of the light source device 20.
- the number of spot lights SP (pulse light) irradiated along one drawing line SL (SL1 to SL6) is uniquely related to the number of pixels arranged in the main scanning direction (for example, 2 for one pixel).
- the interval is shortened.
- the pattern drawn by the drawing lines SL (SL1 to SL6) is shortened as a whole in the main scanning direction.
- the emission frequency Fe is slightly lowered, the pulse interval of the spot light SP projected along the main scanning direction becomes longer.
- the pattern drawn on the drawing lines SL (SL1 to SL6) is the main scanning. Overall longer in direction.
- the drawing lines SL (SL1 to SL6) are arranged.
- the scan length can also be changed.
- Each scanning unit U (U1 to U6) is provided with an origin sensor (not shown) for optically detecting the scanning start timing of the spot light SP scanned by the polygon mirror PM of the scanning unit U (U1 to U6). ing.
- This origin sensor is a detector that receives the reflected light of the measurement light projected on the reflecting surface of the polygon mirror PM and outputs an origin signal.
- the origin sensor outputs an origin signal when the angular position of the reflection surface of the polygon mirror PM reaches a predetermined angular position before the spot light SP is projected onto the scanning start point of the drawing line SL (SL1 to SL6).
- the drawing optical element AOM (AOM1 to AOM6) is switched based on the serial data DL of the pattern data to start drawing.
- each of the drawing lines SL (SL1 to SL6) is changed by changing the time Ts from the output of the origin signal to the switching start timing of the drawing optical elements AOM (AOM1 to AOM6) based on the serial data DL. It is possible to shift in the main scanning direction.
- the drawing start timing by the spot light SP is advanced, so that the drawing lines SL1, SL3, SL5 are shifted to the + Y direction side, and the drawing lines SL2, SL4, SL6 are moved to the ⁇ Y direction side. Shifted (see FIG. 3).
- the drawing lines SL1, SL3, and SL5 are shifted to the ⁇ Y direction side, and the drawing lines SL2, SL4, and SL6 are shifted to the + Y direction side (see FIG. 3).
- the position in the main scanning direction of the spot light SP projected onto the substrate P corresponding to the design information (pattern data) is finely adjusted.
- the position adjustment of each of the drawing lines SL (SL1 to SL6) in the main scanning direction is performed by shifting the beam LB passing through each scanning unit U (U1 to U6) in a direction corresponding to the main scanning direction. Or an optical member that changes the angle (for example, a parallel flat glass that can be tilted, a reflection mirror that can adjust the angle, and the like).
- the position adjustment of the drawing line SL in the main scanning direction is performed together with the inclination correction of each drawing line SL and the magnification correction of each drawing line SL in the main scanning direction, so that the drawing lines SL (SL1 to SL6) are adjusted. Deterioration of the joining accuracy at each end can be suppressed.
- the position of the drawing line SL (SL1 to SL6) that is the scanning locus of the spot light SP is adjusted, as described above, the inclination correction of the drawing line SL, the magnification correction of the drawing line SL in the main scanning direction, and the main adjustment of the drawing line SL.
- adjustment information information (error amount, correction amount, etc.) related to the position adjustment is called adjustment information.
- FIG. 4 is a diagram showing an example of the configuration of the second pattern exposure unit EXH2.
- the second pattern exposure unit EXH2 rotates a cylindrical reflective mask (hereinafter referred to as a cylindrical mask) M so that the second pattern exposure unit EXH2 is cylindrical with respect to the exposure region W of the substrate P supported by the rotary drum DR while being transported.
- a cylindrical mask hereinafter referred to as a cylindrical mask
- This is a scanning type exposure apparatus that projects an image of a pattern of the mask M (mask pattern).
- An exposure apparatus using such a reflective mask is disclosed in, for example, International Publication No. 2013/094286, and will be briefly described below.
- the second pattern exposure unit EXH2 includes a light source device 22, a plurality of illumination modules IL (IL1 to IL6) constituting an illumination optical system, and a rotary holding drum (cylindrical or columnar base material) that holds a cylindrical mask M. )
- the cylindrical mask M is, for example, a reflective mask using a metal cylindrical body.
- the cylindrical mask M is formed on the surface of a base material of a cylindrical body having a central axis AX1 extending in the Y direction and extending in a direction intersecting with the direction in which gravity works, and a cylindrical outer peripheral surface having a constant radius from the central axis AX1.
- the peripheral surface of the cylindrical mask M is a mask surface P1 on which a predetermined mask pattern is formed.
- a mask pattern is formed that is patterned with a high reflection region that reflects illumination light with high efficiency and a low reflection region that does not reflect reflected light or reflects with very low efficiency.
- Such a cylindrical mask M can be manufactured at low cost because the base material is a cylindrical body made of metal.
- a mask pattern corresponding to all or a part of one pattern layer may be formed on the cylindrical mask M.
- a plurality of mask patterns corresponding to one pattern layer may be formed. That is, a plurality of mask patterns corresponding to one pattern layer may be repeatedly formed on the cylindrical mask M in the circumferential direction.
- the rotation holding drum DR2 holds the cylindrical mask M so that the center axis AX1 of the cylindrical mask M is the rotation center.
- the rotation holding drum DR2 rotates around the central axis AX1 when a rotation torque from a rotation driving source (not shown) (for example, a motor or a speed reduction mechanism) controlled by the control device 14 is applied. Thereby, the cylindrical mask M is scanned.
- the rotation direction of the rotation holding drum DR2 is opposite to the rotation direction of the rotation drum DR, and the rotation holding drum DR2 rotates in synchronization with the rotation of the rotation drum DR. That is, the rotation speed of the rotation holding drum DR2 is the same as the rotation speed of the rotation drum DR.
- a surface that passes through the central axis AXo of the rotating drum DR and the central axis AX1 of the cylindrical mask M and extends in the Y direction is referred to as a central surface Poc2.
- the direction orthogonal to the Y direction on the center plane Poc2 is Z2 ′
- the direction orthogonal to the center plane Poc2 is X2 ′.
- the ⁇ Z2 ′ direction is the direction in which gravity works
- the + X2 ′ direction is the transport direction (scanning direction) side of the substrate P.
- the light source device 22 generates light (illumination light) EL such as ultraviolet rays that irradiates the substrate P.
- the light source device 22 includes, for example, a lamp light source such as a mercury lamp, and a solid light source such as a laser diode and a light emitting diode.
- the illumination light generated by the light source device 22 is guided to a plurality of illumination modules IL (IL1 to IL6) via a light guide member such as an optical fiber (not shown).
- the illumination module IL (IL1 to IL6) includes a plurality of optical members such as an integrator optical system, a rod lens, or a fly-eye lens.
- the illumination modules IL emit illumination light EL (hereinafter referred to as illumination light beam EL1), which is an energy line having a uniform illuminance distribution, into a plurality of illumination regions IR (IR1 to IR1 on the mask surface P1 of the cylindrical mask M). Irradiate IR6).
- the illumination module IL1 irradiates the illumination region IR1 on the cylindrical mask M with the illumination light beam EL1.
- the illumination modules IL2 to IL6 irradiate the illumination regions IR2 to IR6 on the cylindrical mask M with the illumination light beam EL1.
- the plurality of illumination modules IL (IL1 to IL6) have the same configuration.
- a plurality of polarization beam splitters PBS (PBS1 to PBS6) and a plurality of ⁇ / 4 wavelength plates QW (QW1 to QW6) are provided.
- the polarization beam splitter PBS (PBS1 to PBS6), for example, reflects linearly polarized light (for example, P-polarized light) polarized in a predetermined direction and linearly polarized light (for example, S-polarized light) polarized in a direction orthogonal to the predetermined direction. ).
- the illumination light beam EL1 (for example, P-polarized light) from the illumination modules IL (IL1 to IL6) is reflected by the polarization beam splitter PBS (PBS1 to PBS6) and then the ⁇ / 4 wavelength plate QW (QW1 to QW6). Is transmitted to the cylindrical mask M. Then, the reflected light of the illumination light beam EL1 reflected by the cylindrical mask M (hereinafter, image formation light beam EL2) is transmitted through the ⁇ / 4 wavelength plate QW (QW1 to QW6) and the polarization beam splitter PBS (PBS1 to PBS6). The light enters the projection module PL (PL1 to PL6).
- the polarization beam splitter PBS PBS1 to PBS6
- the plurality of projection modules PL project the imaging light beam EL2 (energy beam) onto the plurality of projection areas PA (PA1 to PA6) on the irradiated surface onto the substrate P supported by the rotating drum DR.
- the illumination light beam EL1 from the illumination module IL and the imaging light beam EL2 that is the reflected light are incident on the polarization beam splitter PBS1 and the ⁇ / 4 wavelength plate QW1.
- the illumination light beam EL1 from the illumination modules IL2 to IL6 and the imaging light beam EL2 which is the reflected light are incident on the polarization beam splitters PBS2 to PBS6 and the ⁇ / 4 wave plates QW2 to QW6.
- the plurality of illumination modules IL are arranged in two rows in the circumferential direction of the cylindrical mask M with the center plane Poc2 interposed therebetween.
- the odd-numbered illumination modules IL1, IL3, and IL5 are arranged in a line along the Y direction on the upstream side ( ⁇ X2 ′ direction side) in the scanning direction (rotation direction) of the cylindrical mask M with respect to the center plane Poc2.
- the even-numbered illumination modules IL2, IL4, and IL6 are arranged in a line along the Y direction on the downstream side (+ X2 ′ direction side) in the scanning direction (rotation direction) of the cylindrical mask M with respect to the center plane Poc2. Yes.
- FIG. 5A is a plan view of the illumination area IR (IR1 to IR6) on the cylindrical mask M held by the rotary holding drum DR2 as seen from the ⁇ Z2 ′ direction side.
- the plurality of illumination regions IR are arranged in two rows in the circumferential direction (X2 ′ direction) of the cylindrical mask M across the center plane Poc2.
- Illumination regions IR1, IR3, IR5 are arranged on the cylindrical mask M on the upstream side ( ⁇ X2 ′ direction side) in the scanning direction of the cylindrical mask M, and the cylinder on the downstream side (+ X2 ′ direction side) in the scanning direction of the cylindrical mask M.
- Illumination areas IR2, IR4, and IR6 are arranged on the mask M.
- the illumination region IR (IR1 to IR6) is an elongated trapezoidal region having parallel short sides and long sides extending in the width direction (Y direction) of the cylindrical mask M.
- the odd-numbered illumination areas IR1, IR3, and IR5 and the even-numbered illumination areas IR2, IR4, and IR6 are disposed on the inner side so that the short sides thereof face each other, and the long sides are disposed on the outer side. ing.
- the odd-numbered illumination areas IR1, IR3, IR5 are arranged in a line at a predetermined interval along the Y direction.
- even-numbered illumination areas IR2, IR4, and IR6 are also arranged in one row at a predetermined interval along the Y direction.
- the illumination area IR2 is arranged between the illumination area IR1 and the illumination area IR3 in the Y direction.
- the illumination area IR3 is disposed between the illumination area IR2 and the illumination area IR4 with respect to the Y direction.
- the illumination region IR4 is disposed between the illumination region IR3 and the illumination region IR5 with respect to the Y direction, and the illumination region IR5 is disposed between the illumination region IR4 and the illumination region IR6 with respect to the Y direction.
- Each illumination region IR (IR1 to IR6) is arranged so that the triangular portions of adjacent trapezoidal illumination regions IR overlap (overlapping) in the X2 ′ direction.
- Each illumination region IR (IR1 to IR6) is a trapezoidal region, but may be a rectangular region.
- the cylindrical mask M has a pattern formation region A1 where a mask pattern is formed and a pattern non-formation region A2 where a mask pattern is not formed.
- the pattern non-formation area A2 is a low reflection area that absorbs the illumination light beam EL1.
- the plurality of illumination regions IR are arranged so as to cover the entire width of the pattern formation region A1 in the Y direction. This pattern formation region A1 corresponds to the exposure region W of the substrate P.
- the plurality of projection modules PL project the imaging light beam EL2 from the cylindrical mask M onto the plurality of projection areas PA (PA1 to PA6) located on the irradiated surface of the substrate P.
- Projection module PL1 projects imaging light beam EL2 from illumination area IR1 of cylindrical mask M onto projection area PA1.
- the projection modules PL2 to PL6 project the imaging light beam EL2 that is reflected light from the illumination areas IR2 to IR6 of the cylindrical mask M onto the projection areas PA2 to PA6.
- the projection module PL (PL1 to PL6) can project the image of the mask pattern in the illumination area IR (IR1 to IR6) on the cylindrical mask M onto the projection area PA (PA1 to PA6) on the substrate P. it can.
- the plurality of projection modules PL are arranged corresponding to the plurality of illumination modules IL (IL1 to IL6).
- the plurality of projection modules PL (PL1 to PL6) are arranged in two rows in the circumferential direction of the rotary drum DR with the center plane Poc2 interposed therebetween.
- the odd-numbered projection modules PL1, PL3, and PL5 correspond to the positions of the odd-numbered illumination modules IL1, IL3, and IL5, and are on the upstream side ( ⁇ X2 ′ direction side) in the transport direction of the substrate P with respect to the center plane Poc2. Thus, they are arranged in a line along the Y direction.
- the even-numbered projection modules PL2, PL4, and PL6 correspond to the positions of the even-numbered illumination modules IL2, IL4, and IL6 on the downstream side (+ X2 ′ direction side) in the transport direction of the substrate P with respect to the center plane Poc2. , Arranged in a row along the Y direction.
- FIG. 5B is a plan view of the projection area PA (PA1 to PA6) on the irradiated surface of the substrate P supported by the rotary drum DR as seen from the + Z direction side.
- the plurality of projection areas PA (PA1 to PA6) on the substrate P are arranged in correspondence with the plurality of illumination areas IR (IR1 to I6) on the cylindrical mask M. That is, the plurality of projection areas PA (PA1 to PA6) are arranged in two rows in the circumferential direction (X2 ′ direction) of the rotary drum DR across the center plane Poc2.
- Projection areas PA1, PA3, and PA5 are arranged on the substrate P on the upstream side ( ⁇ X2 ′ direction side) in the transport direction of the substrate P, and on the substrate P on the downstream side (+ X2 ′ direction side) in the transport direction of the substrate P.
- Projection areas PA2, PA4, and PA6 are arranged.
- the projection areas PA (PA1 to PA6) are elongated trapezoidal areas having parallel short sides and long sides extending in the width direction (Y direction) of the substrate P (rotating drum DR).
- the odd-numbered projection areas PA1, PA3, and PA5 and the even-numbered projection areas PA2, PA4, and PA6 are arranged on the inside so that the short sides thereof face each other, and are arranged so that the long sides are on the outside. ing.
- the odd-numbered projection areas PA1, PA3, and PA5 are arranged in a line at a predetermined interval along the Y direction.
- even-numbered projection areas PA2, PA4, and PA6 are also arranged in a line at a predetermined interval along the Y direction.
- the projection area PA2 is arranged between the projection area PA1 and the projection area PA3 in the Y direction.
- the projection area PA3 is arranged between the projection area PA2 and the projection area PA4 with respect to the Y direction.
- the projection area PA4 is arranged between the projection area PA3 and the projection area PA5 with respect to the Y direction
- the projection area PA5 is arranged between the projection area PA4 and the projection area PA6 with respect to the Y direction.
- Each projection area PA (PA1 to PA6) is arranged so that the triangular portions of adjacent trapezoidal projection areas PA overlap (overlapping) in the X2 ′ direction.
- Each projection area PA (PA1 to PA6) is a trapezoidal area, but may be a rectangular area.
- the plurality of projection areas PA (PA1 to PA6) are arranged so as to cover the entire width of the exposure area W set on the substrate P in the Y direction.
- the illumination area IR (IR1 to IR6) on the mask surface P1 of the cylindrical mask M is scanned in the ⁇ X2 ′ direction by scanning (rotating) the cylindrical mask M, and the projection on the irradiated surface of the substrate P is performed by the rotation of the rotating drum DR.
- the area PA (PA1 to PA6) is scanned in the ⁇ X2 ′ direction. Therefore, the imaging light beam EL2 corresponding to the image of the mask pattern in the illumination region IR (IR1 to IR6) scanned in the ⁇ X2 ′ direction is scanned in the ⁇ X2 ′ direction by the projection module PL (PL1 to PL6).
- the light is projected onto the projection area PA (PA1 to PA6) on the irradiated surface of the substrate P.
- the mask pattern formed on the mask surface P1 of the cylindrical mask M is exposed to the exposure region W of the substrate P.
- each projection module PL has a position, size (magnification), and inclination with respect to the Y direction of the projection area PA (PA1 to PA6) projected onto the substrate P.
- a correction optical system (not shown) that can adjust at least one of the above is provided.
- at least one of the position, size (magnification), and inclination with respect to the Y direction of the mask pattern image on the substrate P in the illumination region IR (IR1 to IR6) on the cylindrical mask M can be adjusted.
- Such a multi-lens pattern exposure unit that corrects the projection image of the mask pattern when performing projection exposure using the cylindrical mask M is also disclosed in the above-mentioned pamphlet of International Publication No.
- the control device 14 drives the correction optical system of the projection module PL (PL1 to PL6) based on the position information of the mark MK (MK1 to MK4) detected using the alignment microscope ALG (ALG1 to ALG4), The projected mask pattern image may be corrected.
- This correction optical system is driven by an actuator (not shown) under the control of the control device 14.
- FIG. 6 is a diagram showing an example of a configuration according to another method of the second pattern exposure unit EXH2 using a transmissive cylindrical mask.
- the second pattern exposure unit EXH2 shown in FIG. 6 exposes a predetermined pattern onto the substrate P by a so-called proximity method.
- the same components as those in FIG. 4 are denoted by the same reference numerals.
- the second pattern exposure unit EXH2 in FIG. 6 includes a light source device 24 and a rotation holding drum DR2 that holds a transmissive cylindrical mask M. In the case of FIG.
- the rotary holding drum DR2 is composed of a circular tube made of quartz or the like having a constant thickness, and a mask pattern patterned with a light-shielding layer (such as chromium) is formed on the outer peripheral surface of the circular tube. Is done.
- the cylindrical mask M is installed so that the gap with the rotation holding drum DR2 is very small. While the cylindrical mask M is rotated in the scanning direction (rotating direction), the light source device 24 directly irradiates the substrate P supported by the rotating drum DR with illumination light (illumination light beam) EL that is an energy beam, thereby forming a cylinder. An illumination light beam EL corresponding to the image of the mask pattern formed on the mask M is projected onto the irradiated surface of the substrate P.
- illumination light illumination light
- the illumination light beam EL irradiated to the substrate P from the light source device 24 is irradiated in the ⁇ Z2 ′ direction on the center plane Poc2.
- the rotation holding drum DR2 rotates in a direction opposite to the rotation direction of the rotation drum DR, and rotates in synchronization with the rotation of the rotation drum DR.
- the two types of second pattern exposure unit EXH2 have been described, but the method of the second pattern exposure unit EXH2 is not limited thereto. That is, the second pattern exposure unit EXH2 scans the exposure area W of the substrate P with an image of a mask pattern (an image by reflected light or an image by transmitted light) formed on the mask surface P1 of the cylindrical mask M. Any scanning type exposure apparatus may be used.
- FIG. 7 is a view showing the arrangement of the exposure system 30 in the first embodiment.
- the exposure system 30 includes an exposure apparatus EX, an actual pattern information generation unit 32, and a mask creation apparatus 34.
- the actual pattern information generation unit 32 is illustrated as being separate from the exposure apparatus EX and the mask creation apparatus 34, but the actual pattern information generation unit 32 is included in the exposure apparatus EX or the mask creation apparatus 34. May be provided.
- the position of the mark MK is measured based on the tendency of deformation of the exposure region W formed on the substrate P.
- productivity is improved while increasing overlay accuracy during overlay exposure of the substrate P.
- the control device (output unit) 14 of the exposure apparatus EX makes marks MK (MK1 ⁇ MK1) sequentially detected by the alignment microscope ALG in order to create a mask pattern corresponding to the pattern to be exposed in the exposure area W.
- MK4 position information and adjustment information (error amount and adjustment amount for inclination correction of the drawing line SL, magnification correction of the drawing line SL in the main scanning direction, shift correction of the drawing line SL in the main scanning direction, etc.) At least one of them is output to the actual pattern information generation unit 32.
- the “pattern to be exposed in the exposure region W” is a pattern actually exposed by the first pattern exposure unit EXH1, that is, a pattern after the projection position (drawing position) of the spot light SP is adjusted.
- the control device 14 outputs at least one of position information and adjustment information of the mark MK (MK1 to MK4) in order to create a mask pattern corresponding to the pattern actually exposed by the first pattern exposure unit EXH1.
- the adjustment information is the position of the spot light SP projected on the substrate P corresponding to the design information (pattern data) based on the position information of the marks MK (MK1 to MK4).
- Information on position adjustment (the inclination angle of the drawing line SL, the magnification of the drawing line SL in the scanning direction, the shift amount of the drawing line SL in the scanning direction, etc.).
- the control device 14 outputs information relating to the position adjustment of the spot light SP of each scanning unit U (U1 to U6).
- the real pattern information generation unit 32 includes a computer and a storage medium in which a program or the like is stored, and functions as the real pattern information generation unit 32 of the present embodiment when the computer executes the program.
- the actual pattern information generation unit 32 corrects the design information (pattern data) based on at least one of the position information and the adjustment information of the marks MK (MK1 to MK4) sent to the exposure area W on the substrate P.
- Actual pattern information (pattern data) for creating a mask pattern corresponding to the pattern to be exposed is generated.
- the actual pattern information generation unit 32 corrects the design information (pattern data) based on at least one of the position information and the adjustment information of the marks MK (MK1 to MK4), and the first pattern exposure unit EXH1 actually Real pattern information (pattern data) for creating a mask pattern for obtaining an exposed pattern is generated.
- Design information is design information (pattern data) used in the first pattern exposure unit EXH1 of the exposure apparatus EX. This pattern data (design information) is stored in the storage medium of the actual pattern information generation unit 32.
- the actual pattern information generation unit 32 outputs the generated actual pattern information to the mask creation device 34.
- the actual pattern information generation unit 32 generates actual pattern information obtained by correcting the design information (pattern data) of each scanning unit U (U1 to U6).
- the mask creating device 34 exposes a pattern corresponding to the actual pattern information onto the cylindrical mask substrate MP, thereby forming a mask pattern corresponding to the actual pattern information on the mask substrate MP.
- the mask substrate MP on which the mask pattern corresponding to the actual pattern information is formed becomes the cylindrical mask M used in the second pattern exposure unit EXH2.
- the mask creating apparatus 34 includes an exposure apparatus EX2.
- the exposure apparatus EX2 includes a third pattern exposure unit EXH3, a rotation holding drum DR3 that holds a cylindrical mask substrate MP on which a photosensitive functional layer (for example, a photoresist layer) is formed, and a control unit 36. And have.
- the control device 36 is a computer that controls the exposure by the third pattern exposure unit EXH3 and the rotation of the rotation holding drum DR3.
- the third pattern exposure unit EXH3 has the same configuration as the first pattern exposure unit EXH1. Therefore, the third pattern exposure unit EXH3 will be described by appropriately using the reference numerals given to the configuration of the first pattern exposure unit EXH1.
- the rotation holding drum DR3 has the same configuration as the rotation holding drum DR2, and holds the mask substrate MP so that the central axis AX1 of the mask substrate MP is the rotation center.
- the scanning units U (U1 to U6) of the third pattern exposure unit EXH3 use energy rays to the mask substrate MP that is held and rotated by the rotation holding drum DR3 under the control of the control device 36. While projecting the spot light SP of a certain beam LB onto the mask substrate MP, the spot light SP is scanned one-dimensionally (main scan) in the main scanning direction (Y direction) on the mask substrate MP. At this time, the control device 36 gives the actual pattern information (pattern data) sent from the actual pattern information generation unit 32 to the third pattern exposure unit EXH3, so that the actual pattern information is transmitted to the third pattern exposure unit EXH3. A pattern corresponding to the information is exposed on the irradiated surface of the mask substrate MP.
- the third pattern exposure unit EXH3 modulates (on / off) the intensity of the spot light SP scanned in the main scanning direction at high speed based on the actual pattern information under the control of the control device 36.
- the pattern corresponding to the actual pattern information is exposed.
- the actual pattern information becomes design information for exposing the pattern to the mask substrate MP.
- the intensity of the spot light SP is modulated by the drawing optical element AOM (AOM1 to AOM6) of the light introducing optical system BDU (BDU1 to BDU6) provided in the third pattern exposure unit EXH3 in the same manner as the first pattern exposure unit EXH1. ).
- the pulsed beam LB emitted by the light source device 20 of the third pattern exposure unit EXH3 may be an electron beam or a light beam such as ultraviolet rays.
- the third pattern exposure unit EXH3 modulates the intensity of the spot light SP projected on the irradiated surface of the mask substrate MP based on the actual pattern information, the third pattern exposure is performed.
- the pattern drawn by the part EXH3 becomes a mask pattern for obtaining a pattern actually exposed by the first pattern exposure part EXH1.
- the mask creating apparatus 34 has been subjected to exposure processing by an exposure apparatus EX2, a film forming apparatus that forms a photosensitive functional layer (for example, a photoresist layer) on the surface of the mask substrate MP.
- a developing device that performs development on the mask substrate MP, an etching device that performs etching on the mask substrate on which development has been performed, and the like are provided.
- the film forming apparatus, the exposure apparatus EX2, the developing apparatus, the etching apparatus, and the like process the mask substrate MP, thereby forming the cylindrical mask M on which the mask pattern corresponding to the actual pattern information is formed. That is, the mask substrate MP is a cylindrical mask having a mask pattern supported in a cylindrical shape.
- the sheet-like mask substrate MP is attached to the outer peripheral surface of the cylindrical rotation holding drum DR2 in the exposure apparatus EX.
- the mask substrate MP is directly formed on the outer peripheral surface of the cylindrical base material to form a cylindrical mask, the entire rotation holding drum DR2 is replaced.
- the controller 14 of the exposure apparatus EX performs overlay exposure for the first time on the substrate P sent from the supply roll mounted on the device manufacturing system 10, the substrate P tends to be deformed in any state. Since it is not known whether the pattern to be drawn is exposed by the first pattern exposure unit EXH1 that can flexibly deform the pattern to be drawn. That is, based on the position information of the marks MK (MK1 to MK4) detected using the alignment microscope ALG (ALG1 to ALG4), the position of the spot light SP projected on the substrate P corresponding to the design information (drawing data) Finely adjust to draw a pattern.
- the control device 14 sequentially stores at least one of the adjustment information relating to the position adjustment of the spot light SP and the position information of the detected marks MK (MK1 to MK4).
- the control device 14 makes a series of marks MK ( At least one of the position information of MK1 to MK4) and the adjustment information of the spot light SP whose position is adjusted based on the position information is output to the actual pattern information generation unit 32.
- the position information of the marks MK (MK1 to MK4) reflects a certain tendency of the exposure area W over the plurality of exposure areas W arranged in the longitudinal direction
- At least one of the position information and adjustment information of the mark MK is output to the actual pattern information generation unit 32.
- the exposure area W also has a certain deformation (distortion) tendency.
- the actual pattern information generation unit 32 generates actual pattern information based on at least one of the position information and adjustment information of the mark MK.
- the mask creation device 34 generates a cylindrical mask M having a mask pattern corresponding to the actual pattern information.
- the mask creating apparatus 34 creates a mask pattern that reflects the regularity.
- a cylindrical mask M is generated.
- the third pattern exposure unit EXH3 of the mask creating apparatus 34 modulates the intensity of the spot light SP scanned in the main scanning direction based on the actual pattern information, so that a pattern corresponding to the actual pattern information is generated.
- the mask substrate MP is exposed.
- the cylindrical mask M created by the exposure system 30 is attached to the second pattern exposure unit EXH2, and the second pattern exposure unit EXH2 is created under the control of the control device 14.
- Pattern exposure is performed on the substrate P using the mask M. That is, the mask pattern formed on the cylindrical mask M is projected onto the irradiated surface of the substrate P.
- the control device 14 stops the exposure by the first pattern exposure unit EXH1 before the exposure by the second pattern exposure unit EXH2 is started. Thereby, after the cylindrical mask M is mounted on the second pattern exposure unit EXH2, the exposure is performed only by the second pattern exposure unit EXH2, so that the transport speed of the substrate P can be increased, and the pattern exposure is performed.
- the processing time can be shortened (productivity can be improved). As a result, the formation time of the pattern layer is shortened.
- the control device 14 detects the position information of the mark MK (MK1 to MK6) using the alignment microscope ALG (ALG1 to ALG4) while the second pattern exposure unit EXH2 is performing the exposure.
- the control device 14 detects the position information of the marks MK (MK1 to MK4) during the exposure of the second pattern exposure unit EXH2. Based on the above, even if the mask pattern image projected on the substrate P is corrected by driving the correction optical system provided in the projection modules PL (PL1 to PL6) of the second pattern exposure unit EXH2 Good.
- the mask pattern formed on the cylindrical mask M mounted on the second pattern exposure unit EXH2 is totally applied to the two-dimensional deformation of the underlying pattern layer in the exposure region W on the substrate P.
- the pattern is corrected (corrected) from the design pattern so that it can be substantially superimposed on.
- the driving amount of the correction optical system provided in each of the projection modules PL is also small, which contributes to increasing the transport speed of the substrate P.
- the control device 14 also estimates an exposure area estimated based on position information of the marks MK (MK1 to MK4) sequentially detected during the exposure operation of the second pattern exposure unit EXH2 (during the scanning exposure of the substrate P). If the tendency of deformation of W is likely to change beyond an allowable range (correction limit by the correction optical system or the like of the second pattern exposure unit EXH2), the exposure by the second pattern exposure unit EXH2 is stopped. That is, if the tendency of deformation of the exposure area W exceeds the allowable range, the mask pattern formed on the cylindrical mask M can no longer cope with it. Therefore, the control device 14 restarts the exposure by the first pattern exposure unit EXH1.
- the pattern to be drawn can be flexibly deformed according to the transport state of the substrate P and the deformation of the exposure region W, and the exposure processing of the substrate P can be continued.
- the control device 14 reduces the transport speed of the substrate P to a speed at which a pattern can be drawn with the first pattern exposure unit EXH1.
- the exposure processing in the second pattern exposure unit EXH2 using the cylindrical mask M is completed for one exposure region W, and the exposure processing by the first pattern exposure unit EXH1 is performed from the next exposure region W.
- the tip of the next exposure region W is exposed by the first pattern exposure unit EXH1 (drawing).
- the first pattern exposure unit EXH1 draws.
- the rotation of the rotary drum DR and the transport operation of the substrate transport mechanism 12 are stopped so that the substrate P does not slide on the rotary drum DR.
- the control device 14 After that, if the deformation of the exposure region W estimated based on the position information of the marks MK (MK1 to MK4) detected using the alignment microscope ALG (ALG1 to ALG4) has a certain tendency, the control device 14 outputs at least one of the position information and the adjustment information of the mark MK (MK1 to MK4) to the actual pattern information generation unit 32. Then, the actual pattern information generation unit 32 generates the actual pattern information again, and the mask creation device 34 responds to the actual pattern information on another mask substrate MP as design information by using the generated actual pattern information. A mask pattern is formed. Then, the control device 14 again stops the exposure by the first pattern exposure unit EXH1, and causes the second pattern exposure unit EXH2 to start exposure using the newly created mask substrate MP.
- the exposure apparatus EX includes the alignment microscope ALG (ALG1 to ALG4) for detecting the position of the mark MK (MK1 to MK4) on the substrate P on which the electronic device is to be formed.
- ALG alignment microscope
- the spot light SP of the beam LB corresponding to the pattern data (design information) is detected at the position of the detected mark MK (MK1 to MK4).
- the first pattern exposure unit EXH1 that adjusts and projects the position based on the information, and the adjustment information related to the position adjustment and the position information of the marks MK (MK1 to MK4) are used as a pattern to be exposed in the exposure region W.
- a control device (output unit) 14 that outputs the corresponding mask pattern is provided. Therefore, it is possible to create a mask pattern that reflects the pattern actually exposed by the first pattern exposure unit EXH1 (the drawing pattern that has been adjusted to correspond to the deformation of the exposure region W on the substrate P). become.
- the exposure apparatus EX uses the mask pattern created based on at least one of the adjustment information output from the control apparatus 14 and the position information of the marks MK (MK1 to MK4) to form an image of the mask pattern in the exposure area W.
- a second pattern exposure unit EXH2 that projects an illumination light beam EL according to the above. Accordingly, the pattern actually exposed by the maskless first pattern exposure unit EXH1 can be exposed by the second pattern exposure unit EXH2 that performs exposure using the cylindrical mask M. That is, even if the first pattern exposure unit EXH1 is not used, the second pattern exposure unit EXH2 is based on the mask pattern adjusted (corrected) in the same manner as the pattern actually exposed by the first pattern exposure unit EXH1. An exposure process can be executed.
- the second pattern exposure unit EXH2 deforms the image of the mask pattern to be projected based on the position information of the detected marks MK (MK1 to MK4). Thereby, even when the exposure region W is deformed due to the change in the transport state of the substrate P during the exposure of the second pattern exposure unit EXH2, the deformation is within the allowable range (within the correction limit). If there is, the pattern can be exposed in accordance with the deformed exposure area W.
- 1st pattern exposure part EXH1 and 2nd pattern exposure part EXH2 expose a pattern on the sheet-like board
- the transport state of the substrate P on which the pattern is exposed by the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 (the state of being closely contacted and supported by the rotary drum DR) is the same. Therefore, the overlay accuracy of the pattern exposed by the first pattern exposure unit EXH1 and the exposure region W (background pattern) on the substrate P, and the pattern exposed by the second pattern exposure unit EXH2 and the substrate P
- the overlay accuracy with the exposure region W (underlying pattern) becomes substantially the same, and quality variations of manufactured electronic devices can be suppressed.
- the actual pattern information generation unit 32 generates the actual pattern information again when the tendency of deformation of the exposure region W estimated based on the position information of the detected marks MK (MK1 to MK4) exceeds the allowable range. Then, the mask creating apparatus 34 forms a mask pattern on another mask substrate MP based on the actual pattern information generated again. Thereby, pattern exposure by the second pattern exposure unit EXH2 is continued using the newly created mask substrate MP (cylindrical mask M). Therefore, even when the roll length (the total length of the substrate P) reaches several kilometers, continuous exposure processing can be performed without almost stopping the conveyance of the substrate P, and productivity is improved.
- the first pattern exposure unit EXH1 only needs to be exposed by a maskless method. Therefore, the first pattern exposure unit EXH1 may expose a predetermined pattern according to the drawing data using a digital micromirror device (DMD).
- DMD digital micromirror device
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 expose a pattern to the substrate P supported by the same rotary drum DR.
- the rotary drum DR that supports the substrate P that is exposed by the first pattern exposure unit EXH1 is different from the rotary drum DR that supports the substrate P that is exposed by the second pattern exposure unit EXH2. You may make it let.
- FIG. 8 is a view showing the arrangement of the exposure apparatus EXa in the first modification. Note that the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only portions different from those in the above embodiment are described.
- the substrate transport mechanism 12a of the exposure apparatus EXa is arranged in order from the upstream side ( ⁇ X direction side) in the transport direction of the substrate P, the edge position controller EPC, the drive roller R1, the tension adjustment roller RT1, the rotating drum DR (DRa), and the tension adjustment.
- a roller RT2, a rotating drum DR (DRa), a tension adjusting roller RT3, and a driving roller R3 are provided.
- the two rotating drums DRa and DRb have the same configuration as the rotating drum DR described with reference to FIGS.
- the rotary drum DRa is arranged on the upstream side ( ⁇ X direction side) in the transport direction of the substrate P, and the central axis AXo and the shaft Sft are represented by AXo1 and Sft1.
- the rotating drum DRb is disposed on the downstream side (+ X direction side) in the transport direction of the substrate P, and the central axis AXo and the shaft Sft are represented by AXo2 and Sft2.
- the tension adjustment roller RT3 is also urged in the ⁇ Z direction like the tension adjustment rollers RT1 and RT2.
- the tension adjusting rollers RT1 and RT2 apply a predetermined tension in the longitudinal direction to the substrate P that is wound and supported on the rotating drum DRa, and the tension adjusting rollers RT2 and RT3 are wound and supported on the rotating drum DRb.
- a predetermined tension is applied to the substrate P in the longitudinal direction.
- the longitudinal tension applied to the substrate P applied to the rotating drums DRa and DRb is stabilized within a predetermined range.
- the first pattern exposure unit EXH1 is provided above the rotary drum DRa (+ Z direction side), and the second pattern exposure unit EXH2 is provided above the rotary drum DRb (+ Z direction side). Accordingly, the first pattern exposure unit EXH1 can perform exposure on the substrate P supported by the rotary drum DRa, and the second pattern exposure unit EXH2 can be performed by the substrate supported by the rotary drum DRb. P can be exposed.
- Poc1 is a surface that passes through the central axis AXo1 of the rotary drum DRa and extends in the Z direction.
- Poc2 is a surface extending in the Z direction through the central axis AXo2 of the rotary drum DRb.
- the rotary drum DR that supports the substrate P that is exposed by the first pattern exposure unit EXH1 is different from the rotary drum DR that supports the substrate P that is exposed by the second pattern exposure unit EXH2.
- positioning of the 1st pattern exposure part EXH1 and the 2nd pattern exposure part EXH2 improves.
- the alignment microscope ALGa (ALGa1 to ALGa4) images the mark MK (MK1 to MK4) on the substrate P supported by the rotary drum DRa, and the alignment microscope ALGb (ALGb1 to ALGb4) is supported by the rotary drum DRb.
- the mark MK (MK1 to MK4) on the substrate P is imaged.
- the alignment microscopes ALGa and ALGb have the same configuration as the alignment microscope ALG of the first embodiment.
- the first pattern exposure unit EXH1 adjusts the position of the spot light SP corresponding to the design information based on the position information of the marks MK (MK1 to MK4) detected using the alignment microscope ALGa (ALGa1 to ALGa4).
- the pattern is drawn by the raster scan method.
- the second pattern exposure unit EXH2 is a scanning exposure apparatus using the cylindrical mask M shown in FIG. 4, the second pattern exposure unit EXH2 uses an alignment microscope ALGb (ALGb1 to ALGb4).
- ALGb alignment microscope
- whether or not the tendency of deformation of the exposure region W on the substrate P exceeds the allowable range is determined by positional information of the marks MK (MK1 to MK4) detected using the alignment microscope ALGa (ALGa1 to ALGa4), The determination is made using at least one of the positional information of the marks MK (MK1 to MK4) detected using the alignment microscope ALGb (ALGb1 to ALGb4).
- the first pattern exposure unit EXH1 is arranged on the upstream side ( ⁇ X direction side) in the transport direction of the substrate P, and the second pattern exposure unit.
- the EXH 2 is arranged on the downstream side (+ X direction side) in the transport direction of the substrate P, but the arrangement relationship may be reversed. That is, the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are arranged so that the first pattern exposure unit EXH1 is located downstream of the second pattern exposure unit EXH2 in the transport direction of the substrate P. May be.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are in the circumferential direction of the outer peripheral surface of the rotary drum DR (DRa, DRb).
- the pattern exposure is performed on the substrate P that is supported by being curved along the line, the pattern exposure may be performed on the substrate P that is supported in a planar shape.
- the second pattern exposure unit EXH2 of the third modification may be a scanning exposure apparatus (scanning stepper) that uses a planar mask, or a step-and-repeat type projection exposure apparatus (stepper). May be.
- the scanning stepper scans and exposes the imaging light beam EL2 corresponding to the mask pattern image of the planar mask to the substrate P by moving the planar mask and the substrate P in the X direction synchronously.
- the stepper performs batch exposure of the mask pattern in a state where the mask pattern is collectively exposed to the exposure region W while the plane mask and the substrate P are stationary, and then the substrate P is moved stepwise to be stationary again. is there.
- the mask substrate (blanks) MP formed by the mask creating device 34 supports the mask pattern in a flat shape, and therefore, quartz or the like. It becomes a parallel plate.
- Modification 4 In the first embodiment and each of the modifications described above, it corresponds to the deformation of the exposure region W (or the substrate P) estimated based on the position information of the marks MK (MK1 to MK4).
- the drawing lines SL (SL1 to SL6) in the first pattern exposure unit EXH1 are tilted with respect to the Y axis, the scanning length (magnification) of the drawing lines SL (SL1 to SL6) is changed, and the drawing lines SL (SL1 to SL6) are changed.
- the scanning position of the spot light SP projected on the substrate P was finely adjusted by shifting SL6) in the main scanning direction.
- the original region is adapted to correspond to the deformation of the exposure region W (or the substrate P) estimated based on the position information of the marks MK (MK1 to MK4).
- Pattern data corrected design information obtained by correcting design information (original pattern data) may be generated.
- the first pattern exposure unit EXH1 modulates the intensity of the spot light SP during scanning using the generated modified design information (bitmap data).
- the generated modified design information is also sent to the actual pattern information generating unit 32, and the actual pattern information generating unit 32 receives only the received corrected design information or the position information of the marks MK (MK1 to MK4) and Real pattern information is generated using at least one of the adjustment information and the modified design information.
- the actual pattern information generation unit 32 may generate actual pattern information by recorrecting the modified design information using at least one of the position information and the adjustment information of the marks MK (MK1 to MK4).
- the exposure apparatus EXb includes a transport device that transports the substrate P in the X direction in a predetermined tension state.
- the substrate P is supported by being curved by a rotary drum DR at an exposure position, or a flat stage (for example, a fluid) It is supported in a planar shape by a planar holder that supports the substrate P with a bearing layer. As shown in FIG.
- an exposure apparatus EXb includes a maskless first pattern exposure unit EXH1 in which six projection modules U1 ′ to U6 ′ using DMD are arranged in a staggered manner, and a central axis.
- a second pattern exposure unit EXH2 that uses a transmission type cylindrical mask M (similar to FIG. 6) in which a mask pattern is formed on the outer peripheral surface of the rotary holding drum DR2 rotating around AX1.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are arranged side by side in the Y direction (the width direction orthogonal to the longitudinal direction of the substrate P) on the exposure unit support frame 200, and each of the exposure unit support frames.
- the guide 200 is guided by linear guide portions 200a and 200b extending in the Y direction, and is movable in the Y direction.
- substrate P in a planar shape with a flat stage you may use the structure disclosed by the international publication 2013/150677 pamphlet, for example.
- the maskless exposure process is performed by sliding either the first pattern exposure unit EXH1 or the second pattern exposure unit EXH2 in the Y direction so as to face the substrate P.
- a mask type exposure process can be selected.
- FIG. 9 shows a state at the time of maskless exposure in which the first pattern exposure unit EXH1 is made to face the substrate P
- FIG. 10 shows a state at the time of mask exposure in which the second pattern exposure unit EXH2 is made to face the substrate P. Show.
- the four alignment microscopes ALG1 to ALG4 are arranged on the upstream side in the transport direction of the substrate P with respect to the exposure position on the substrate P, and each of the marks MK (MK1 to MK1 to MK1 on the substrate P). MK4) is detected.
- the first pattern exposure unit EXH1 of the maskless method using DMD for example, the configuration disclosed in International Publication No. 2008/090942 pamphlet can be used, and a first type using a transmission type cylindrical mask M is used.
- the second pattern exposure unit EXH2 for example, a proximity-type exposure mechanism disclosed in International Publication No. 2013/136834 pamphlet can be used.
- the first pattern exposure unit EXH1 of the present embodiment has a two-dimensional distribution of local projection light corresponding to a pattern to be drawn while the substrate P is sent at a constant speed in the X direction (sub-scanning direction). Is dynamically modulated by DMD. At that time, a signal for driving each of the many micromirrors of the DMD is generated by correcting the original design information (CAD information) by the estimated distortion due to the deformation of the exposure region W or the like. Therefore, if the state change of the signal for driving each micromirror of the DMD and the movement position of the substrate P in the sub-scanning direction (or the movement position of the mark MK) are stored in precise correspondence, the exposure area W of the substrate P is stored.
- CAD information original design information
- the actual pattern information (corrected design information after correction) actually overlaid and exposed can be generated by the actual pattern information generation unit 32 in FIG.
- the cylindrical mask M to be mounted on the second pattern exposure unit EXH2 can be immediately created by the mask creating device 34 of FIG.
- the other is on the transport path of the substrate P. It is arranged in a state of leaving outside (side). Therefore, maintenance inspection (maintenance) of the pattern exposure units EXH1 and EXH2 is facilitated. Furthermore, in the second pattern exposure unit EXH2, the mounting (replacement) operation of the cylindrical mask M is facilitated, and a mask changer mechanism for automatically replacing the mask can be easily incorporated.
- a calibration unit unit for measuring and calibrating the mutual positional relationship of the light distributions projected from each of the six projection modules U1 ′ to U6 ′ using the DMD Can be arranged immediately below ( ⁇ Z direction side) the first pattern exposure unit EXH1 positioned as shown in FIG.
- the second embodiment may be modified as follows.
- FIG. 11 is a view showing a planar arrangement of an exposure apparatus EXb according to Modification 1 of the second embodiment.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are integrally provided on an exposure unit support turret 210 that is rotatable about a shaft 210a.
- the exposure unit support turret 210 is raised in the + Z direction by a certain distance (for example, about 1 cm), and then the axis 210a is centered. Rotate 180 degrees clockwise or counterclockwise.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are machined with the accuracy ( ⁇ several ⁇ m) of the bearing that supports the shaft 210a. Therefore, it can be set at a predetermined position. Also in the case of the first modification, the maintenance and inspection (maintenance) work of the pattern exposure units EXH1 and EXH2 and the mounting (replacement) work of the cylindrical mask M are facilitated, and the mask changer mechanism and the calibration unit part can be easily incorporated. .
- FIG. 12 is a diagram showing a schematic configuration of an exposure apparatus EXb according to Modification 2 of the second embodiment as viewed from the front.
- the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 are supported by the guide unit 220a of the exposure unit support frame 220 linearly extending in the X direction.
- the guide part 220a functions as a rail linearly formed in the X direction, and each of the first pattern exposure part EXH1 and the second pattern exposure part EXH2 is provided to be movable in the X direction along the guide part 220a. It has been.
- the pattern exposure units EXH1 and EXH2 are moved in the transport direction of the substrate P (the movement direction of the substrate P when crossing the center plane Poc2), and the mask exposure mode and the maskless exposure mode are changed. I was able to switch. Therefore, as shown in FIGS. 9 to 11, when one of the first pattern exposure unit EXH1 and the second pattern exposure unit EXH2 is viewed in the XY plane, it is outside the transport path of the substrate P. Although it cannot be arranged, the footprint (installation area) of the exposure apparatus EXb as a whole can be reduced.
- FIG. 13 shows the overall configuration of the device manufacturing apparatus according to the third embodiment
- FIG. 14 shows the configuration of the exposure unit incorporated in the device manufacturing apparatus of FIG.
- the device manufacturing apparatus pulls out a flexible long substrate P wound around a supply roll FR1 and supplies it to a process apparatus (processing section) PR1 in the previous process.
- SU an exposure apparatus EXC that exposes the substrate P processed by the process apparatus PR1, a process apparatus (processing section) PR2 that performs a post-process on the exposed substrate P, and a recovery roll FR2 that processes the post-processed substrate P It is comprised with collection
- the exposure apparatus EXC includes, for example, three exposure units EXc1, EXc2, and EXc3, and has an exposure control unit ECT for overall control thereof.
- the process apparatus PR1 includes a rotating drum RS1 that supports the substrate P sent from the supply unit SU on the outer peripheral surface and moves it in the longitudinal direction, and a liquid photosensitive material on the surface of the substrate P supported by the rotating drum RS1.
- the substrate P on which the photosensitive functional layer made of the photosensitive material is formed by the process apparatus PR1 is subjected to exposure processing by the exposure apparatus EXC, and then wet processing is performed on the photosensitive functional layer by the process apparatus PR2.
- the process apparatus PR2 includes a liquid tank WB1 for performing wet chemical treatment on the photosensitive functional layer, a liquid tank WB2 for washing the chemically treated substrate P with pure water, and the washed substrate. It is comprised with the drying part HS3 which heats P and dries.
- the exposure apparatus EXC of the present embodiment includes a proximity type exposure unit EXc1 similar to that shown in FIG. 6 using a transmission type cylindrical mask M1, and a maskless type using a scanning beam similar to that shown in FIG.
- the exposure unit EXc1 is arranged inside the cylindrical mask M1 and a light source device (illumination system) 24 for irradiating the substrate P with exposure light, and a driving mechanism (not shown) that rotates the cylindrical mask M1 around the central axis AX1.
- a rotating drum (substrate supporting member) DRA that can rotate around the central axis AXa while supporting the substrate P on the outer peripheral surface (support surface), and the rotating drum DRA is rotated to lengthen the substrate P.
- a driving mechanism (not shown) that moves in the direction of the scale, a scale disk SD of an encoder system that measures the rotational angle position (movement amount of the substrate P) of the rotary drum DRA, and the alignment microscopes ALG1 to ALG4 shown in FIGS.
- An alignment system ALGA constituted by: Such an exposure unit EXc1 is disclosed in, for example, the pamphlet of International Publication No. 2013/136634 and the pamphlet of International Publication No. 2013/146184, and detailed description thereof will be omitted.
- the exposure unit EXc2 can rotate around the central axis AXb while supporting the substrate P sent from the exposure unit EXc1 via the rollers R13 and R14 of the transport unit on the outer peripheral surface (support surface).
- a rotating drum (substrate support member) DRB, a driving mechanism (not shown) that rotates the rotating drum DRB to move the substrate P in the longitudinal direction, and a rotational angle position (amount of movement of the substrate P) of the rotating drum DRB is measured.
- a plurality of beam scanning type scanning units U1 to U6 that draw a pattern by focusing on the substrate P and scanning on the substrate P.
- Such an exposure part EXc2 is specifically described in, for example, the pamphlet of International Publication No. 2015/152217 and the pamphlet of International Publication No. 2015/152218, but detailed description thereof is omitted here.
- the scanning units U1 to U6 are based on the arrangement state of the marks MK1 to MK4 (see FIG.
- the exposure unit EXc3 is sent from the exposure unit EXc2 via a drive mechanism (not shown) that rotates the reflective cylindrical mask M2 around the central axis AX1 and rollers R15 and R16 of the transport unit.
- a rotating drum (substrate supporting member) DRC that can rotate around the central axis AXc while supporting the coming substrate P on the outer peripheral surface (support surface), and a substrate that moves the substrate P in the longitudinal direction by rotating the rotating drum DRC.
- An alignment system comprising the illustrated drive mechanism, the scale disk SD of the encoder system for measuring the rotational angular position (the amount of movement of the substrate P) of the rotary drum DRC, and the alignment microscopes ALG1 to ALG4 shown in FIGS.
- Such a multi-lens projection type exposure unit EXc3 is also disclosed in, for example, International Publication No. 2014/073535 pamphlet, and thus detailed description is omitted, but on the substrate P measured by the alignment system ALGC.
- two-dimensional deformation of the substrate P (or the exposure area W) is estimated, and provided in each of the projection modules PL1 to PL6 so as to match the deformation.
- the shift correction system for the projection image, the minute rotation correction system for the projection image, and the magnification correction system for the projection image are adjusted.
- Such a correction system is also disclosed in International Publication No. 2014/073535.
- each of the rotary drums DRA, DRB, DRC provided in each of the exposure portions EXc1, EXc2, EXc3 is made with the same dimensions, and the optical reflection characteristics of the outer peripheral surface as the surface characteristics and the substrate P
- the friction characteristics and the like of the Any one of these shape characteristics, optical characteristics, and friction characteristics as surface characteristics may be provided.
- the shape characteristic includes the curvature (diameter), roughness, hardness, material, etc. of the outer peripheral surface
- the friction characteristic includes the friction coefficient of the outer peripheral surface.
- the optical characteristics include reflectance for exposure light (beam, illumination light beam, imaging light beam, etc.).
- the distance of the substrate P from the position where the substrate P starts to be supported by the rotary drums DRA, DRB, DRC (contact start position) to the detection region (Vw1 to Vw4 in FIG. 3) of each alignment system ALGA, ALGB, ALGC. are set to be substantially the same.
- the same encoder system (scale disk SD) for measuring the rotation angle of each rotary drum DRA, DRB, DRC is used.
- the rollers R12, R14, R16 and the like are configured as tension rollers for setting substantially the same tension applied to the substrate P on the upstream side of each of the rotating drums DRA, DRB, DRC.
- the exposure unit that does not perform the exposure processing on the substrate P may not set the tension applied to the substrate P to be the same as the tension in the other exposure units.
- the exposure apparatus EXC is an optimum exposure method that takes into consideration the transport state of the substrate P, the deformation state of the exposure region W of the pattern for the electronic device set on the substrate P or the substrate P, or productivity.
- the substrate P is exposed using at least one of a plurality of exposure units EXc1, EXc2, and EXc3 (three in this case) having different exposure methods so that good pattern exposure can be performed.
- the substrate P sent from the process apparatus PR1 is a PET film on which copper foil or aluminum foil is vapor-deposited and is a substrate for first layer exposure (first exposure) in which no pattern is formed
- first layer exposure first exposure
- either one of the proximity type exposure unit EXc1 and the projection type exposure unit EXc3 is used.
- overlay exposure second exposure
- the maskless type exposure unit EXc2 or the projection type exposure unit EXc3 is selected.
- the substrate P can be exposed by using two of the exposure parts EXc1, EXc2, and EXc3 in combination.
- Proximity exposure processing using the cylindrical mask M1 by the exposure unit EXc1 is a case where the minimum dimension (minimum line width) of the pattern to be exposed is relatively large, such as several tens of ⁇ m, and does not require high overlay accuracy.
- high productivity (tact) can be obtained.
- the exposure processing by the exposure unit EXc3 of the multi-lens projection method using the cylindrical mask M2 a high resolution of about several ⁇ m is obtained as the minimum dimension (minimum line width) of the pattern to be exposed, and the multi-lens (projection module) By correcting the projected image for each PL, there is an advantage that high overlay accuracy can be obtained and relatively high productivity (tact) can be obtained.
- the exposure control unit ECT shown in FIG. 13 performs exposure suitable for the substrate P sent from the process apparatus PR1. Select a mode and execute.
- the first exposure mode simply uses one of the three exposure parts EXc1, EXc2, and EXc3, and the second exposure mode uses two exposure parts EXc1 and EXc2 together. In this exposure mode, two exposure portions EXc2 and EXc3 are used in combination.
- the first exposure mode when the substrate P is in the first exposure and the fineness of the pattern to be exposed in the first exposure is high (the minimum dimension is small), either the exposure part EXc2 or the exposure part EXc3 is used.
- the exposure part EXc1 or the exposure part EXc3 When the fineness of the pattern to be exposed in the first exposure is low (the minimum dimension is large), either the exposure part EXc1 or the exposure part EXc3 is used. However, when the exposure part EXc1 or the exposure part EXc3 is used, a cylindrical mask M1 or M2 on which a pattern for first exposure is formed is prepared. In the first exposure mode, when the substrate P is in the second exposure, when the overlay accuracy is prioritized, either the exposure part EXc2 or the exposure part EXc3 is used. When the overlay accuracy is not strict, either the exposure part EXc1 or the exposure part EXc3 is used even in the second exposure.
- a cylindrical mask M1 or M2 on which a second exposure pattern is formed is prepared.
- the cylindrical mask M1 or M2 for the second exposure can be produced as in the first embodiment (FIG. 7).
- the second exposure mode a part of the pattern to be transferred to the exposure area W on the substrate P is exposed by the proximity method by the exposure unit EXc1, and then the other part of the pattern to be transferred to the exposure area W is exposed. Exposure is performed in a maskless manner by the portion EXc2.
- the second exposure mode can be applied to both the first exposure and the second exposure, and a part of the pattern exposed in the exposure part EXc1 is a part with a low degree of fineness (a minimum dimension is large), and the exposure part EXc2
- the other part of the pattern to be exposed is a portion having a high degree of fineness (small minimum dimension) or a portion requiring high overlay accuracy.
- the cylindrical mask M1 in which the pattern for the first exposure or the second exposure is decomposed into a portion with a low fineness (or overlay accuracy) and a portion with a high fineness (or overlay accuracy) to form a pattern with a portion with a low fineness (or overlay accuracy).
- a pattern of a portion having a high degree of fineness (or overlay accuracy) is prepared as drawing data of the exposure unit EXc2. Accordingly, in the second exposure mode, the exposure region W of the substrate P is exposed twice with a time interval, and the pattern exposed first by the exposure unit EXc1 and the second exposure by the exposure unit EXc2.
- the third exposure mode after a part of the pattern to be transferred to the exposure area W of the substrate P is exposed by the maskless method by the exposure part EXc2, the other part of the pattern to be transferred to the exposure area W is exposed to the exposure part. Exposure is performed by the projection method by EXc3.
- the third exposure mode can also be applied to both the first exposure and the second exposure, but is particularly suitable for the second exposure.
- a part of the exposure area W exposed by the exposure part EXc2 is a part with a large deformation
- the other part of the exposure area W exposed by the exposure part EXc3 is a part with a small deformation.
- the tendency of deformation of the exposure region W on the substrate P is estimated or measured in advance, and a pattern corresponding to a portion (region) with a large degree of deformation is exposed by a maskless method, and a portion (region) with a small degree of deformation is exposed.
- a pattern corresponding to is formed on the cylindrical mask M2 and exposed by a projection method.
- the pattern for second exposure is decomposed into a portion with a low fineness and a portion with a low fineness, and a pattern with a portion with a low fineness is formed on the cylindrical mask M2.
- the pattern of the portion having a high value may be prepared as drawing data of the exposure unit EXc2.
- the cylindrical mask M2 attached to the exposure unit EXc3 in the third exposure mode can be created according to the first embodiment (FIG. 7).
- the exposure format depends on the fineness, productivity, or overlay accuracy of the pattern when transferring to the continuous substrate P (exposure area W) that is continuously conveyed. Since a plurality of different exposure portions EXc1, EXc2, and EXc3 can be selected and continuously exposed, productivity can be ensured while maintaining the quality of the electronic device manufactured on the substrate P.
- the maskless type exposure unit EXc2 is used together as in the second exposure mode and the third exposure mode, a part of the pattern in the exposure region W formed on the cylindrical masks M1 and M2 is exposed. The portion exposed by the portion EXc2 is set to be unexposed on the substrate P.
- the conveyance speed of the substrate P can be reduced to a speed suitable for the exposure unit EXc2. That is, the transport speed of the substrate P in the exposure part EXc2 is intermittently switched between a speed suitable for the exposure part EXc2 and a speed suitable for the other exposure part EXc1 (or EXc3). As described above, when the conveyance speed of the substrate P in the exposure unit EXc2 is changed intermittently, the substrate P is placed between the rollers R13 and R14 shown in FIG.
- the configurations and surface characteristics of the rotating drums DRA, DRB, DRC that support and transport the substrate P at the exposure position, and the substrate P transport conditions (such as the tension of the substrate P) are the same. Therefore, each of the exposure units EXc1, EXc2, and EXc3 can perform the exposure process while supporting the substrate P in the same state. For this reason, it is possible to align the slight deformation and misalignment that may occur when the substrate P (or the exposure area W) is supported by the rotary drums DRA, DRB, and DRC, and the electronic device formed in the exposure area W Variation in quality can be suppressed.
- the third embodiment may be modified as follows.
- the second exposure is performed in consideration of the deformation information of the substrate P (exposure region W) acquired based on the arrangement state of the marks MK1 to MK4 of the substrate P detected by the alignment system ALGB of the second exposure unit EXc2.
- the relative positional relationship between the drawing beam (exposure light) and the substrate P may be corrected when the portion EXc2 draws the pattern on the substrate P.
- the second exposure unit EXc2 can grasp the deformation state of the substrate P (exposure region W) before being measured by the alignment system ALGB immediately before exposure, and can accurately set the correction amount at the time of drawing.
- the deformation information of the substrate P (exposure region W) acquired based on the positional relationship between the marks MK1 to MK4 of the substrate P detected by the alignment system ALGB of the second exposure unit EXc2 is used as the third exposure unit EXc3.
- the third exposure unit EXc3 applies the information to the substrate P.
- the relative positional relationship between the projected image (exposure light) and the substrate P may be corrected.
- the third exposure unit EXc3 can grasp the deformation state of the substrate P (exposure region W) before being measured immediately before exposure by the alignment system ALGC, and can accurately adjust the correction amount of the projected image. Time for setting can be provided, and the overlay error can be further reduced.
- the management of the deformation information and the correction control as described above are instructed by the exposure control unit ECT shown in FIG.
- the exposure units EXc1, EXc2, and EXc3 constituting the exposure apparatus EXC are arranged in the order of the proximity method, the maskless method, and the projection method along the transport path of the substrate P.
- the order may be anything.
- the cylindrical mask M1 or M2 attached to the proximity type exposure unit EXc1 or the projection type exposure unit EXc3 may be created as in the first embodiment (FIG. 7). Further, similarly to the first embodiment, only the two exposure units EXc1 and EXc2 with different exposure methods or only the two exposure units EXc2 and EXc3 with different exposure methods are transported by the substrate P. You may arrange
- the quality of the electronic device pattern (overlay accuracy, reproducibility of pattern dimensions, etc.) formed on the sheet-like substrate P by the roll-to-roll method by the production line (manufacturing method) as shown in FIG.
- a fourth exposure mode in which the proximity type exposure unit EXc1 and the projection type exposure unit EXc3 are used together may be applied.
- a pattern portion having a low fineness is formed on the cylindrical mask M1 mounted on the proximity type exposure unit EXc1
- a pattern portion having a high fineness is formed on the cylindrical mask M2 mounted on the projection type exposure unit EXc3.
- the exposure region W may be exposed by superimposing the two.
- the maskless exposure unit EXc2 uses a digital micromirror device (DMD) that controls the posture and position of each of a number of micromirrors arranged two-dimensionally based on pattern design information (CAD data or the like).
- DMD digital micromirror device
- CAD data pattern design information
- a method of generating exposure light whose intensity distribution is modulated in accordance with the pattern and projecting the exposure light onto the substrate P through a projection system, that is, a maskless method by so-called DMD may be used.
- a solution photoresist solution, ultraviolet curable resin solution, photosensitive plating
- a sheet film on which a dry film resist layer is formed and the substrate P are laminated together.
- the substrate P having a dry film resist layer transferred to the surface may be used.
- a dry film resist layer (hereinafter also referred to as a DFR layer) has a characteristic that when exposed to exposure light in an ultraviolet wavelength region of about 400 nm to 300 nm, the transparency is lowered and discolored.
- the exposed pattern or alignment mark can be detected as a latent image by the alignment systems ALGB and ALGC shown in FIG.
- a part of the pattern exposed to the DRF layer of the substrate P and the alignment mark by the exposure unit EXc1 installed on the upstream side in the transport direction of the substrate P is the exposure unit EXc2 on the downstream side. This can be detected by the alignment system ALGB or the alignment system ALGC of the exposure part EXc3.
- the alignment unit ALGB detects the exposure unit.
- the pattern portion with a low fineness exposed on the substrate P by EXc1 and the pattern portion with a high fineness subsequently exposed on the substrate P by the exposure portion EXc2 (or EXc3) can be precisely aligned (joined). .
- the light source devices 20, 22, and 24 provided for each of the exposure units EXc1 to EXc3 described in the third embodiment of FIG. 14 and the modifications are gas or solid laser light sources, mercury discharge lamps. Different types of light sources such as high-intensity LEDs or the same type of light source may be used. When the same type of light source device or the same light source device can be used, the adjustment operation, maintenance work, or replacement operation of the light source device is made common, so that the running cost can be reduced. Further, as shown in FIG. 3, each of alignment system ALGA of exposure unit EXc1, alignment system ALGB of exposure unit EXc2, and alignment system ALGC of exposure unit EXc3 shown in FIG.
- a plurality of alignment microscopes ALG1 to ALG4 arranged at predetermined intervals in the Y direction).
- the arrangement relationship in the Y direction of each observation region (detection region) Vw1 to Vw4 of the alignment microscopes ALG1 to ALG4 is set to be the same among the alignment systems ALGA, ALGB, and ALGC, but is set to a different arrangement relationship. May be.
- the number of arrangement in the Y direction of the alignment microscope ALG is not limited to four places as shown in FIG. 3, and may be different (at least two or more places) among the alignment systems ALGA, ALGB, and ALGC.
- FIG. 15 shows four sheets formed in a ribbon shape over a length of several meters to several tens of meters in the X direction on a sheet-like substrate P (PET or PEN) having a long X direction.
- the structural example of sensor RSS1, RSS2, RSS3, RSS4 is shown.
- Each of the four sheet sensors RSS1 to RSS4 has a plurality of power supply lines Vdd, Vss (GND), and a signal line CBL formed on the substrate P.
- the sheet sensor RSS1 is embedded in, for example, soil (a field) where crops are grown, and various amounts of moisture, ph value, temperature, nutrient amount (nitrogen component, phosphorus component, etc.), etc., are set at regular intervals Lsp in the soil. Measurement is performed by a sensor, and the measurement value is converted into digital data by an electronic device (such as a microcomputer chip) formed in the fine pattern area FPA, and is then collected by an information collection device (data relay device) attached to the end of the sheet sensor RSS1. Serial communication is performed via the signal line CBL.
- sheet sensors RSS1 to RSS4 change the type of sensor formed in the fine pattern area FPA and the measurement algorithm (measurement software) using a microcomputer chip to change the seawater of farms for fisheries as well as for soil for crops. It can also be used as a sensor for measuring the temperature, the flow rate of seawater, seawater components, etc. at every interval Lsp in the depth direction.
- the positive electrode power line Vdd, the negative electrode (ground) power line Vss (GND), and the signal line CBL are made of a copper foil layer having a thickness of several ⁇ m to several tens ⁇ m.
- the distance from the information collecting device connected to one end of the sheet sensor RSS1 to the other end may be several tens of meters or more, and the power lines Vdd, Vss, and the signal line CBL The width of each line is made as thick as possible to reduce the voltage drop (signal loss).
- the thickness of the wiring pattern for the electronic circuit formed in the fine pattern area FPA varies depending on the shape and density of the electronic component to be mounted, but is a few tens to several hundreds ⁇ m at the minimum. Furthermore, when it is necessary to directly form a plurality of TFTs in the fine pattern area FPA, the line width of the TFT gate lines and source / drain lines is several tens of ⁇ m or less, preferably 20 ⁇ m or less, and superposition patterning is performed. (Second exposure) is also required.
- the fine pattern region FPA having the length in the X direction Lfa (Lfa ⁇ Lsp) arranged at the interval Lsp is used.
- the fine pattern inside is exposed by the exposure portion EXc2 (or EXc3) in FIG. 14, and thick patterns (rough patterns) such as signal lines CBL and power supply lines Vdd and Vss between the fine pattern areas FPA are shown in FIG.
- the exposure portion EXc1 is assigned to perform exposure. In that case, a buffer mechanism (accumulator) is provided between the roller R13 and the roller R14 in FIG.
- the transport speed of the substrate P when the exposure unit EXc1 exposes a rough pattern is V1
- the transport speed of the substrate P when the exposure unit EXc2 performs pattern exposure on the fine pattern area FPA is V2 (V2 ⁇ V1).
- the rotational speed of the rotary drum DRB of the exposure unit EXc2 is increased, and the substrate P is fed at a speed V3 that is faster than the transport speed V1. You may make it reduce to the original conveyance speed V2 before the pattern exposure with respect to the fine pattern area
- the transport speed of the substrate P rotational speed of the rotary drum DRB
- the accumulation length of the substrate P accumulated in the buffer mechanism is suppressed from increasing (or decreasing) with time.
- the interval Lsp is about 1 m to several m
- the length Lfa of the fine pattern region FPA is about several cm to several tens of cm.
- the sheet sensors RSS1 to RSS4 formed on the substrate P have a multilayer wiring structure of two or more layers, and there are a portion where a high overlay accuracy is required between layers and a portion where the overlay accuracy may be low. Even when such a pattern is exposed, at least two of the three exposure portions EXc1 to EXc3 shown in FIG. 14 (two exposure portions EXc1 and EXc2 and two exposure portions EXc2 and EXc3) are exposed. Alternatively, continuous exposure processing can be performed using the exposure unit EXc1 and the exposure unit EXc3), which enables efficient production. In the production line in which the exposure unit EXc1 and the exposure unit EXc3 among the three exposure units EXc1 to EXc3 shown in FIG.
- the cylindrical masks M1 and M2 are used, it is necessary to prepare the cylindrical masks M1 and M2, respectively. Since the cost increases, the running cost (production cost) may be increased. However, since the cylindrical masks M1 and M2 are used, the transport speed of the substrate P can be increased, and a fine pattern portion and a pattern portion having a large line width and a coarse pattern portion, or a pattern portion requiring high overlay accuracy. Since the pattern portion which may have a low overlay accuracy can be sequentially exposed in the exposure area W during one transport of the substrate P, productivity (tact) can be increased, and the total production cost can be reduced. Can be suppressed.
- W Exposure area (device formation area)
- CBL signal line
- FPA fine pattern area
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Abstract
Description
図1は、第1の実施の形態において、基板(被照射体である対象物)Pに露光処理を施す露光装置EXを含むデバイス製造システム10の概略構成図である。なお、以下の説明においては、特に断わりのない限り、XYZ直交座標系を設定し、図に示す矢印にしたがって、X方向、Y方向、およびZ方向を説明する。
上記第1の実施の形態は、以下のように変形してもよい。
図9、図10は、第2の実施の形態による露光装置EXbの構成をZ方向から見た平面図である。なお、上記第1の実施の形態と同一の構成については同一の符号を付してその詳細な説明を省略し、上記実施の形態と異なる部分について説明する。露光装置EXbは、基板Pを所定のテンション状態でX方向に搬送する搬送装置を備えており、基板Pは、露光位置において回転ドラムDRで湾曲して支持されるか、フラットステージ(例えば、流体ベアリング層で基板Pを支持する平面ホルダ)によって平面状に支持される。図9に示すように、本実施の形態の露光装置EXbは、DMDを使った6つの投影モジュールU1’~U6’を千鳥配置にしたマスクレス方式の第1のパターン露光部EXH1と、中心軸AX1の回りに回転する回転保持ドラムDR2の外周面にマスクパターンが形成された透過型の円筒マスクM(図6と同様)を用いる第2のパターン露光部EXH2とを有する。第1のパターン露光部EXH1と第2のパターン露光部EXH2は、露光部支持フレーム200上にY方向(基板Pの長尺方向と直交する幅方向)に並んで配置され、それぞれ露光部支持フレーム200のY方向に延びた直線ガイド部200a、200bに案内されてY方向に移動可能となっている。なお、フラットステージによって基板Pを平面状に支持する構成として、例えば、国際公開第2013/150677号パンフレットに開示された構成を使ってもよい。
上記第2の実施の形態は、以下のように変形してもよい。
図13は第3の実施の形態によるデバイス製造装置の全体の構成を示し、図14は、図13のデバイス製造装置に組み込まれる露光部の構成を示す図である。本実施の形態のデバイス製造装置は、図13のように、供給ロールFR1に巻かれた可撓性の長尺の基板Pを引き出して前工程のプロセス装置(処理部)PR1に供給する供給部SUと、プロセス装置PR1で処理された基板Pを露光処理する露光装置EXCと、露光後の基板Pに後工程を施すプロセス装置(処理部)PR2と、後処理された基板Pを回収ロールFR2に巻き取る回収部PUとで構成される。露光装置EXCは、図14に示すように、例えば3つの露光部EXc1、EXc2、EXc3を備え、それらを統括制御するための露光制御部ECTを有する。
上記第3の実施の形態は、以下のように変形してもよい。
14、36…制御装置 20、22、24…光源装置
30…露光システム 32…実パターン情報生成部
34…マスク作成装置
ALG、ALG1~ALG4、ALGa、ALGb…アライメント顕微鏡
ALGA、ALGB、ALGC…アライメント系
AX1、AXo、AXo1、AXo2、AXa、AXb、AXc…中心軸
DR、DRa、DRb、DRA、DRB、DRC、RS1…回転ドラム
DR2、DR3…回転保持ドラム EL、EL1…照明光束
EL2…結像光束
EX、EX2、EXa、EXb、EXC…露光装置
EXc1、EXc2、EXc3…露光部
EXH1…第1のパターン露光部
EXH2…第2のパターン露光部
EXH3…第3のパターン露光部
LB…ビーム MK、MK1~MK4…マーク
M、M1、M2…円筒マスク MP…マスク用基板
P…基板
PL、PL1~PL6…投影モジュール
RSS1、RSS2、RSS3、RSS4…シートセンサー
SP…スポット光
W…露光領域(デバイス形成領域)
Vdd、Vss(GND)…電源ライン CBL…信号ライン
FPA…微細パターン領域
Claims (24)
- 可撓性の長尺のシート基板を長手方向に沿って搬送して、前記シート基板上に電子デバイス用のパターンを露光する露光装置であって、
前記シート基板上に形成された複数のマークのマーク位置情報を検出するマーク検出部と、
前記電子デバイスが形成されるべき前記シート基板上のデバイス形成領域に前記パターンを露光するために、前記パターンの設計情報に対応したエネルギー線を前記マーク位置情報に基づいて位置調整して投射する第1のパターン露光部と、
前記デバイス形成領域に投射される前記エネルギー線の前記位置調整に関する調整情報と前記マーク位置情報との少なくとも一方を、前記デバイス形成領域内に露光すべき前記パターンに対応したマスクパターンの作成のために出力する出力部と、
を備える、露光装置。 - 請求項1に記載の露光装置であって、
前記出力部が出力した前記調整情報と前記マーク位置情報との少なくとも一方に基づいて作成された前記マスクパターンを用いて、前記デバイス形成領域に前記マスクパターンの像に応じたエネルギー線を投射する第2のパターン露光部を備える、露光装置。 - 請求項2に記載の露光装置であって、
前記第2のパターン露光部は、前記マーク位置情報に基づいて投射する前記マスクパターンの像を変形させる、露光装置。 - 請求項2または3に記載の露光装置であって、
前記第2のパターン露光部は、前記マスクパターンが形成されたマスクの作成が完了すると、前記マスクパターンの像に対応したエネルギー線による露光を開始し、
前記第1のパターン露光部は、前記第2のパターン露光部による前記マスクパターンの像の露光が開始される前に、前記パターンの設計情報に対応したエネルギー線による露光を中止する、露光装置。 - 請求項4に記載の露光装置であって、
前記第1のパターン露光部は、前記マーク検出部が検出した前記マーク位置情報の傾向が許容範囲を超えて変わった場合は、前記パターンの設計情報に対応したエネルギー線による露光を再開し、
前記第2のパターン露光部は、前記第1のパターン露光部による前記パターンの露光が再開される前に、前記マスクパターンの像に対応したエネルギー線による露光を中止する、露光装置。 - 請求項2~5のいずれか1項に記載の露光装置であって、
前記シート基板の前記長手方向と直交する幅方向に延びた中心軸と、前記中心軸から一定半径の円筒状の外周面とを有し、前記外周面に倣って前記シート基板の一部を前記長手方向に湾曲させて支持しつつ、前記中心軸を中心に回転して前記シート基板を搬送することで、前記シート基板を搬送する回転ドラムを備え、
前記第1のパターン露光部および前記第2のパターン露光部は、前記回転ドラムの前記外周面に支持された前記シート基板上に前記エネルギー線を投射する、露光装置。 - 請求項2~5のいずれか1項に記載の露光装置であって、
前記シート基板の前記長手方向と直交する幅方向に延びた中心軸と、前記中心軸から一定半径の円筒状の外周面とを有し、前記外周面に倣って前記シート基板の一部を前記長手方向に湾曲させて支持しつつ、前記中心軸を中心に回転して前記シート基板を搬送することで、前記シート基板を搬送する第1の回転ドラムと、
前記第1の回転ドラムの下流側または上流側に設けられ、前記第1の回転ドラムと同一の構成を有する第2の回転ドラムと、
を備え、
前記第1のパターン露光部および前記第2のパターン露光部の一方は、前記第1の回転ドラムの前記外周面に支持された前記シート基板上に前記エネルギー線を投射し、他方は、前記第2の回転ドラムの前記外周面に支持された前記シート基板上に前記エネルギー線を投射する、露光装置。 - 可撓性の長尺のシート基板を長手方向に沿って搬送して、前記シート基板上に電子デバイス用のパターンを露光する露光システムであって、
請求項1~7のいずれか1項に記載の露光装置と、
前記出力部が出力した前記調整情報と前記マーク位置情報との少なくとも一方に基づいて前記設計情報を補正して、前記デバイス形成領域内に露光すべき前記パターンに対応したマスクパターンの作成のために実パターン情報を生成する実パターン情報生成部と、
設計情報に基づいてエネルギー線を投射する第3のパターン露光部を用いて前記マスクパターンを作成するマスク作成装置と、
を備え、
前記マスク作成装置は、前記マスクパターンが形成されるマスク用基板を保持し、前記実パターン情報を前記設計情報として前記第3のパターン露光部に与えて、前記マスク用基板上に前記実パターン情報に対応したエネルギー線を投射することで、前記実パターン情報に対応した前記マスクパターンを前記マスク用基板上に形成する、露光システム。 - 請求項8に記載の露光システムであって、
前記実パターン情報生成部は、前記マーク検出部が検出した前記マーク位置情報の傾向が許容範囲を超えて変わった場合は、前記実パターン情報を再度生成し、
前記マスク作成装置は、再度生成された前記実パターン情報に基づいて前記マスクパターンを別のマスク用基板上に形成する、露光システム。 - 可撓性の長尺のシート基板を長手方向に沿って搬送して、前記シート基板上に電子デバイス用のパターンを露光処理する基板処理方法であって、
前記シート基板上に形成された複数のマークのマーク位置情報を検出する検出工程と、
設計情報に応じたエネルギー線を投射する第1のパターン露光部によって、前記電子デバイスが形成されるべき前記シート基板上のデバイス形成領域に、前記パターンの設計情報に対応したエネルギー線を前記マーク位置情報に基づいて位置調整して投射する第1露光工程と、
前記デバイス形成領域に投射される前記エネルギー線の前記位置調整に関する調整情報と前記マーク位置情報との少なくとも一方と前記設計情報とに基づいて前記デバイス形成領域内に露光すべきマスクパターンの作成に供される実パターン情報を生成する生成工程と、
を含む、基板処理方法。 - 請求項10に記載の基板処理方法であって、
第2のパターン露光部に保持されるマスク用基板上に、前記実パターン情報に対応したエネルギー線を投射することで、前記実パターン情報に対応した前記マスクパターンを前記マスク用基板に形成するマスク作成工程と、
を含む、基板処理方法。 - 請求項11に記載の基板処理方法であって、
第2のパターン露光部が、前記マスクパターンが形成された前記マスク用基板を用いて、前記デバイス形成領域に前記マスクパターンに応じた前記エネルギー線を投射する第2露光工程を含む、基板処理方法。 - 請求項12に記載の基板処理方法であって、
前記第2露光工程は、前記マスクパターンが作成された前記マスク用基板が前記第2のパターン露光部に装着された後に開始され、
前記第1露光工程は、前記第2露光工程による前記マスクパターンの露光が開始される前に、前記第1のパターン露光部による前記パターンの露光を中止する、基板処理方法。 - 請求項13に記載の基板処理方法であって、
前記第1露光工程は、前記検出工程において検出された前記マーク位置情報の傾向が許容範囲を超えて変わった場合は、再開され、
前記第2露光工程は、前記第1露光工程による前記パターンの露光が再開される前に、中止される、基板処理方法。 - 請求項14に記載の基板処理方法であって、
前記生成工程は、前記検出工程において検出された前記マーク位置情報の傾向が許容範囲を超えて変わった場合は、前記実パターン情報を再度生成し、
前記マスク作成工程は、再度生成された前記実パターン情報に基づいて、別の前記マスク用基板上に前記実パターン情報に対応した前記マスクパターンを作成する、基板処理方法。 - 請求項11~15のいずれか1項に記載の基板処理方法であって、
前記マスク用基板は、前記マスクパターンを平面状に担持する平面マスク、または円筒状に担持する円筒マスクの少なくとも一方の形態で構成される、基板処理方法。 - 可撓性の長尺の基板を長尺方向に搬送しつつ、電子デバイスのパターンに対応した露光光をシート基板に照射する露光部を複数用いて前記基板に前記電子デバイスを形成するデバイス製造装置であって、
前記複数の露光部は前記基板の搬送方向に沿って配置され、
前記複数の露光部の各々は、前記電子デバイスのパターンに応じた露光光が照射される前記基板を、前記搬送方向に湾曲させて支持する支持面を有する基板支持部材を備え、
前記複数の露光部は、互いに異なる露光方式で前記パターンを前記基板に露光するように構成された、デバイス製造装置。 - 請求項17に記載のデバイス製造装置であって、
前記複数の露光部の各々の前記基板支持部材の前記支持面の表面特性を揃えた、デバイス製造装置。 - 請求項18に記載のデバイス製造装置であって、
前記表面特性は、前記基板支持部材の前記支持面の形状特性、光学特性、摩擦特性の少なくとも1つを含む、デバイス製造装置。 - 請求項19に記載のデバイス製造装置であって、
前記形状特性は、前記支持面の曲率、粗さを含み、前記光学特性は前記露光光に対する反射率を含み、前記摩擦特性は前記支持面の摩擦係数を含む、デバイス製造装置。 - 請求項17~20のいずれか1項に記載のデバイス製造装置であって、
異なる露光方式の前記複数の露光部は、マスクに形成されたパターンをプロキシミティ方式で前記基板に露光する露光部、マスクに形成されたパターンを投影光学系によって投影方式で前記基板に露光する露光部、およびパターンのデータに基づいて変調された露光光で前記基板にパターンを露光するマスクレス方式の露光部のうち、少なくとも2つ以上である、デバイス製造装置。 - 請求項21に記載のデバイス製造装置であって、
前記複数の露光部の各々は、前記基板上に長尺方向に沿って形成された複数のマークの位置情報を検出するアライメント系を備え、
前記複数の露光部のうちの前記シート基板の搬送方向の下流側に位置する第1の露光部は、上流側に位置する第2の露光部の前記アライメント系で検出された前記位置情報と、前記第1の露光部の前記アライメント系で検出された前記位置情報とに基づいて、前記電子デバイスのパターンに応じた前記露光光と前記基板との相対位置関係を補正する、デバイス製造装置。 - 請求項22に記載のデバイス製造装置であって、
前記第1の露光部は前記電子デバイスのパターンの一部を前記基板上に露光し、前記第2の露光部は前記電子デバイスのパターンの他の一部を、前記第1の露光部によって前記基板上に露光されたパターンに位置合わせして露光する、デバイス製造装置。 - 請求項21~23のいずれか1項に記載のデバイス製造装置であって、
前記マスクは、前記基板の長尺方向への移動に同期して回転する透過型または反射型の円筒マスクであり、
前記マスクレス方式の露光部は、前記パターンのデータに応じてデジタルマイクロミラーデバイスによって変調された露光光を前記基板に投射する方式と、前記パターンのデータに応じて変調されたビームを回転ポリゴンミラーで走査しつつ前記基板に投射する方式のいずれか一方である、デバイス製造装置。
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JP2011033908A (ja) * | 2009-08-04 | 2011-02-17 | Nikon Corp | 露光装置、露光方法及びデバイス製造方法 |
WO2011099563A1 (ja) * | 2010-02-12 | 2011-08-18 | 株式会社ニコン | 基板処理装置 |
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JPWO2017094770A1 (ja) | 2018-09-20 |
CN109375475A (zh) | 2019-02-22 |
CN108604063A (zh) | 2018-09-28 |
KR20180087385A (ko) | 2018-08-01 |
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