WO2023282211A1 - 露光装置、デバイス製造方法およびフラットパネルディスプレイの製造方法 - Google Patents
露光装置、デバイス製造方法およびフラットパネルディスプレイの製造方法 Download PDFInfo
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- WO2023282211A1 WO2023282211A1 PCT/JP2022/026497 JP2022026497W WO2023282211A1 WO 2023282211 A1 WO2023282211 A1 WO 2023282211A1 JP 2022026497 W JP2022026497 W JP 2022026497W WO 2023282211 A1 WO2023282211 A1 WO 2023282211A1
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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
- G03F7/70425—Imaging strategies, e.g. for increasing throughput or resolution, printing product fields larger than the image field or compensating lithography- or non-lithography errors, e.g. proximity correction, mix-and-match, stitching or double patterning
- G03F7/70475—Stitching, i.e. connecting image fields to produce a device field, the field occupied by a device such as a memory chip, processor chip, CCD, flat panel display
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
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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
- G03F7/70216—Mask projection systems
- G03F7/70283—Mask effects on the imaging process
- G03F7/70291—Addressable masks, e.g. spatial light modulators [SLMs], digital micro-mirror devices [DMDs] or liquid crystal display [LCD] patterning devices
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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
- G03F7/70358—Scanning exposure, i.e. relative movement of patterned beam and workpiece during imaging
Definitions
- the present invention relates to an exposure apparatus, device manufacturing method, and flat panel display manufacturing method.
- This application claims priority based on Japanese Patent Application No. 2021-111777 filed on July 5, 2021, the contents of which are incorporated herein.
- an exposure apparatus that irradiates a substrate with illumination light through an optical system
- light modulated by a spatial light modulator is passed through a projection optical system, and an image of this light is projected onto a resist coated on the substrate.
- An exposure apparatus that forms an image and performs exposure is known (see, for example, Patent Document 1).
- the second exposure pattern is moved in the scanning direction while the substrate exposed to the first exposure pattern, which is a part of the first exposure portion and the part of the second exposure portion, is spliced together.
- An exposure apparatus for superimposing exposure on a first exposure pattern comprising a plurality of exposure modules for dividing and exposing the second exposure pattern, the plurality of exposure modules having a plurality of elements and the second exposure.
- a spatial light modulator in which the plurality of elements are controlled according to a pattern; an illumination optical system that illuminates the spatial light modulator; and an image of the spatial light modulator controlled according to the second exposure pattern.
- a projection optical system for projecting onto the substrate, wherein at least one of the plurality of exposure modules has a spliced portion where a portion of the first exposed portion and a portion of the second exposed portion are spliced together. expose.
- Another aspect of the present invention is an exposure apparatus that exposes a substrate exposed with a first exposure pattern so as to overlap the first exposure pattern with a second exposure pattern while moving the substrate exposed with the first exposure pattern in a scanning direction, a plurality of exposure modules for dividing and exposing an exposure pattern; a detection unit for detecting a predetermined region in which the exposure state of the first exposure pattern is different from the exposure state of other regions; and based on the detection result of the detection unit, an adjustment unit that adjusts the exposure module, the plurality of exposure modules having a spatial light modulator having a plurality of elements and having the plurality of elements controlled according to the second exposure pattern; an illumination optical system that illuminates a light modulator; and a projection optical system that projects an image of the spatial light modulator controlled according to the second exposure pattern onto the substrate, and is adjusted by the adjustment unit. At least one of the plurality of exposure modules exposes the predetermined area.
- Another aspect of the present invention is an exposure apparatus that exposes a first exposure pattern while moving a substrate in a scanning direction, the exposure apparatus having a plurality of elements and controlling the plurality of elements according to the first exposure pattern.
- an illumination optical system that illuminates the spatial light modulator; a projection optical system that projects an image of the spatial light modulator controlled according to the first exposure pattern onto the substrate; and information about another exposure device that exposes a substrate exposed with the first exposure pattern with a second exposure pattern superimposed on the first exposure pattern.
- a receiving unit for receiving data before exposure on a substrate, and an adjusting unit for adjusting the exposure module based on the information received by the receiving unit.
- One aspect of the present invention includes exposing the substrate using the exposure apparatus described above and developing the exposed substrate.
- One aspect of the present invention includes exposing a flat panel display substrate using the exposure apparatus described above and developing the exposed substrate.
- a first exposure apparatus for projecting and exposing a fixed pattern on a mask onto a substrate and a second exposure apparatus for projecting and exposing a variable pattern by a spatial light modulator onto the substrate are used to perform exposure on the substrate.
- the second step includes: When the position of the projection image of the variable pattern from each of the plurality of exposure modules is corrected based on the stitching error generated in the first step, and the first step is performed after the second step, the In the second step, the position of the projection image of the variable pattern from each of the plurality of exposure modules is corrected based on the predicted splicing error that may occur in the first step.
- FIG. 1 is a perspective view showing an example of an exposure apparatus according to this embodiment; FIG. It is a figure which showed the structure of the exposure unit. It is a figure which showed the structure of the exposure module.
- 4 is a perspective view showing ON/OFF operation of a spatial light modulator; FIG. FIG. 4 is a perspective view showing the operation of the elements of the spatial light modulator; 3 is a side view showing a schematic configuration of a first alignment measurement system provided on the substrate stage;
- FIG. 1 is a perspective view showing a schematic configuration of an exposure device that exposes using a mask;
- FIG. FIG. 4 is a plan view showing a scan layout of a substrate by an exposure apparatus that exposes using a mask; FIG.
- FIG. 4 is a plan view showing a scan layout of a substrate by a maskless exposure apparatus;
- FIG. 4 is an explanatory diagram showing a state of a joint portion of an exposure image formed on a substrate by an exposure device that performs exposure using a mask;
- FIG. 2 is an explanatory diagram showing the relationship between a first exposure pattern by an exposure apparatus that exposes using a mask and a second exposure pattern by a maskless exposure apparatus;
- FIG. 3 is an explanatory diagram showing the relationship between a first exposure pattern by an exposure device that exposes using a mask and alignment marks formed therearound;
- FIG. 4 is an explanatory diagram showing alignment marks formed around a substrate;
- FIG. 11 is a front view showing an example of an exposure apparatus that performs exposure using a mask according to Modification 1;
- FIG. 10 is an explanatory diagram showing the positional relationship of alignment marks in an exposure apparatus that performs exposure using a mask according to Modification 2;
- FIG. 1 is a perspective view showing an example of an exposure apparatus 1 according to this embodiment.
- the exposure device 1 is a device that exposes the substrate 10 via an optical system.
- the exposure apparatus 1 passes light modulated by a spatial light modulator 75 (see FIG. 2) through the projection optical system 7B, forms an image of this light on a photosensitive material (resist), and performs exposure.
- the spatial light modulator 75 and the substrate 10 are provided in an optically conjugate relationship via the projection optical system 7B.
- the substrate 10 is, for example, a display glass substrate coated with a resist on its surface.
- an exposure apparatus 1 includes a substrate stage 4 that supports a substrate 10 , an exposure apparatus main body 2 that scans and exposes the substrate 10 with a predetermined exposure pattern, and conveys the substrate 10 to the substrate stage 4 .
- a substrate replacement unit 3 for placing and a control system 9 for controlling them are provided.
- the direction in which the substrate stage 4 is moved during scanning exposure of the substrate 10 is indicated by the X direction (first direction).
- a direction perpendicular to (crossing) the first direction is defined as a Y direction (second direction).
- a direction orthogonal to the X direction and the Y direction is defined as the Z direction (third direction).
- the substrate stage 4 holds a rectangular substrate 10 in plan view.
- the substrate stage 4 moves in the X direction with respect to the exposure apparatus main body 2 during scanning exposure. This X direction is also called a scanning direction.
- the substrate stage 4 moves in the Y direction to expose a plurality of exposure regions on the substrate 10, respectively. This Y direction is also called a non-scanning direction.
- the exposure apparatus body 2 includes a light source unit 6, an exposure unit 20, and an optical platen 21.
- the exposure unit 20 has a plurality of exposure modules 7 .
- the exposure module 7 incorporates a spatial light modulator 75 (see FIG. 2), is supplied with light from the light source 61, and emits light in a preset exposure pattern.
- a light source unit 6 supplies light to a plurality of exposure modules 7 .
- a light source unit using a laser with high coherence as the light source 61 a light source unit using the light source 61 such as a semiconductor laser type UV-LD, a light source unit using a lens relay type retarder, or the like is adopted. be able to.
- the light source 61 is, for example, a lamp or laser diode that emits a wavelength of 405 nm or 365 nm.
- the exposure unit 20 is mounted on an optical surface plate 21.
- the optical surface plate 21 is kinematically supported at three points by a column 22 that straddles the base plate 11 extending in the X direction on which the substrate stage 4 is placed.
- the optical surface plate 21 is arranged so that the center of gravity is positioned approximately at the center of the base plate 11 in the X direction.
- the column 22 has a pair of horizontal members 221 extending in the Y direction and legs 222 extending downward from both ends of the horizontal members 221 and connected to the base plate 11 . Since the load of the optical surface plate 21 is applied to the legs 222 , an anti-vibration table (not shown) may be arranged at the connection between the base plate 11 and the legs 222 . Three V-grooves are formed at appropriate positions on the upper surface of the horizontal member 221 . The optical surface plate 21 is placed in the V-groove via three balls on a pair of horizontal members 221 with the upper surface 21a facing in the horizontal direction.
- the optical surface plate 21 is equipped with an autofocus system 23 and a second alignment measurement system 5B of the measurement system 5, as shown in FIG.
- the optical surface plate 21 is provided with a plurality of first through holes 21b penetrating in the thickness direction in order to guide the exposure light onto the substrate 10 .
- the method of fixing the optical surface plate 21 to the column 22 is not particularly limited as long as it is a method capable of ensuring rigidity.
- the base plate 11 is installed on the floor via a plurality of anti-vibration pedestals 111 .
- the base plate 11 is a substrate extending in the X direction, and the substrate stage 4 is mounted on its upper surface 11a.
- a guide (not shown) for guiding the substrate stage 4 along the X direction is provided on the upper surface 11a of the base plate 11 .
- the substrate stage 4 is for positioning the substrate 10 with high accuracy with respect to the exposure pattern projected via the projection optical system 7B of the exposure module 7.
- the substrate stage 4 is driven in six degrees of freedom (the X direction, the Y direction, the Z direction, and the ⁇ X, ⁇ Y, and ⁇ Z directions rotating around the respective axes of the X, Y, and Z directions).
- the substrate stage 4 is formed in a flat plate shape, and holds the substrate 10 by suction on its upper surface 4a by, for example, vacuum suction.
- the substrate stage 4 is guided by guides (not shown) on the base plate 11 and moves in the X direction, the Y direction, and the like.
- a linear motor method or the like can be adopted in which the substrate stage 4 is levitated by air and moved by magnetic force.
- the position of the substrate stage 4 is measured by the interferometer 53 shown in FIG. 2 and an encoder (not shown) and controlled by the control system 9 .
- the movement path of the substrate stage 4 is set so as to pass below the exposure unit 20 . That is, the substrate stage 4 is transported to a light exposure position by the exposure unit 20 and is configured to pass through the exposure position. Then, while the substrate stage 4 passes through the exposure unit 20 , the exposure pattern of the image formed by the exposure unit 20 is exposed onto the substrate 10 .
- a plurality of replacement pins (not shown) used when replacing the substrate 10 are provided so as to be retractable in the vertical direction (Z direction). These exchange pins are arranged at predetermined intervals in the X direction and the Y direction in the area where the substrate 10 is arranged on the upper surface 4a of the substrate stage 4. As shown in FIG.
- the protruding length of the replacement pin from the upper surface 4a is set to a length that allows at least the substrate support portion 31 of the replacement arm 3A shown in FIG.
- the substrate exchange section 3 unloads the exposed substrate 10 on the substrate stage 4 to the outside of the substrate stage 4, and then carries the substrate 10 to be exposed onto the substrate stage 4 from which the exposed substrate 10 was unloaded.
- the substrate exchange section 3 has an exchange arm 3A for exchanging the substrate 10 on the substrate stage 4 .
- the substrate exchange section 3 includes a loading arm for loading the substrate 10 onto the substrate stage 4 and a loading arm for loading the substrate 10 as a loading arm 3A.
- the exchange arm 3A has a board support portion 31 at the tip of the arm.
- the exchange arm 3A is provided movably in the X, Y and Z directions.
- the exchange arm 3A is moved in the Y direction to advance the substrate support part 31 below the substrate 10, is further raised to support the substrate 10 from below, and is further moved in the Y direction away from the substrate stage 4.
- the operation of taking out the substrate 10 from the substrate stage 4 is performed.
- the substrate 10 is coated with a photosensitive resist, carried into the exposure apparatus 1, and placed on the plurality of exchange pins provided on the substrate stage 4 by the exchange arm 3A.
- the substrate 10 is held by being attracted to the substrate holder on the substrate stage 4 by lowering the replacement pins.
- FIG. 2 is a diagram showing the configuration of the exposure unit 20.
- the exposure unit 20 includes a plurality of exposure modules 7 each having an illumination optical system 7A, a projection optical system 7B, and a modulator 7C.
- the exposure modules 7 are arranged at predetermined intervals in the Y direction to form a module row.
- a plurality of module rows (four rows in FIG. 1) of the exposure module 7 are formed at intervals in the X direction. Note that each exposure module 7 in each module row is shifted in the Y direction.
- the illumination optical system 7A is provided in a one-to-one relationship with the projection optical system 7B. That is, the same number of illumination optical systems 7A and projection optical systems 7B are provided.
- the illumination optical system 7A makes the output light output from the light source 61 of the light source unit 6 shown in FIG. 1 almost uniformly enter the spatial light modulator 75 as illumination light for exposure.
- FIG. 3 is a diagram showing the configuration of the exposure module 7.
- the illumination optical system 7A includes an optical fiber 71, a collimating lens 721, an illumination wedge 722, a fly-eye lens 723, a main condenser lens 724, and a mirror 725.
- a quartz fiber for example, is used as the optical fiber 71 .
- Output light (laser light L) from the light source 61 is guided by the optical fiber 71 and enters the collimator lens 721 .
- the collimating lens 721 converts the light that is emitted from the optical fiber 71 and spreads into parallel light and emits the parallel light.
- the illumination wedge 722 adjusts the intensity (power) of light emitted from the optical fiber 71 .
- the light that has passed through the collimator lens 721 passes through the fly-eye lens 723 and the main condenser lens 724, is reflected by the mirror 725, and enters the spatial light modulator 75 at a predetermined reflection angle.
- the illumination optical system 7A and the light source unit 6 can be considered to illuminate the spatial light modulator 75 together, and the two may be collectively expressed as an illumination optical system.
- a module shutter 73 is arranged between the optical fiber 71 and the collimator lens 721 in the illumination optical system 7A.
- the module shutter 73 can turn on (open)/off (shield) the optical path of the laser light L emitted from the optical fiber 71 at high speed for each of the illumination optical system 7A and the projection optical system 7B.
- the modulation section 7C modulates illumination light to create a pattern (variable pattern), and includes a spatial light modulator 75 and an OFF light absorption plate 74.
- a digital mirror device is adopted as an example of the spatial light modulator 75 .
- the spatial light modulator 75 has a plurality of elements (mirrors in a digital mirror device).
- the entire reflecting surface of the spatial light modulator 75 is arranged so as to be perpendicular to the optical axis of the projection optical system 7B and parallel to the XY plane in the apparatus. Therefore, the angle formed by the optical axis of the main condenser lens 724 bent by the mirror 725 and the optical axis of the projection optical system 7B is the incident angle for obliquely illuminating the spatial light modulator 75.
- FIG. The incident angle is set to be approximately twice the tilt angle when driving the individual mirrors of the digital mirror device.
- FIG. 4 is a perspective view showing the ON/OFF operation of the spatial light modulator 75.
- the individual elements of spatial light modulator 75 are rotatable about the X-axis and about the Y-axis.
- FIG. 5 is a perspective view showing the operation of the elements of spatial light modulator 75 .
- FIG. 5A shows the operation of the device when the spatial light modulator 75 is powered off. In the state shown in FIG. 5A, the element has not rotated around either the X-axis or the Y-axis.
- FIG. 5B shows a state in which the spatial light modulator 75 is powered on, the element rotates and tilts around the Y-axis, and the incident light from the illumination optical system 7A is projected onto the projection optical system. It shows an ON state in which the light is reflected toward 7B.
- FIG. 5C shows a state in which the power of the spatial light modulator 75 is on, the element rotates around the X axis and tilts, and the light from the illumination optical system 7A is projected onto the projection optical system 7B. Instead, it shows the OFF state in which the light is reflected toward the OFF light absorption plate 74 as indicated by L2 in FIG.
- the spatial light modulator 75 can control the ON state and OFF state of each element based on the control data to form a pattern (variable pattern).
- the light source 61 needs to illuminate the spatial light modulator 75 in each pattern update period, it is preferable that the light source 61 emits pulsed light at a constant period or is capable of pulsed light emission only for a predetermined period.
- the light source 61 may emit continuous light. In that case, the continuous light is converted into pulsed light by switching a shutter (not shown) or modulated by an acoustooptic modulator (not shown).
- the light emitted from the light source 61 may be substantially pulsed light.
- the spatial light modulator 75 is mounted on a stage (not shown) and finely moved in the X and/or Y directions while mounted on the stage (see FIG. 3). As a result, the spatial light modulator 75 is moved with respect to the illumination light, and the position of the projected image of the pattern on the substrate 10 can be changed, for example, the deviation of the projected position from the target value can be corrected.
- the projection optical system 7B is supported by the optical surface plate 21 and arranged below the spatial light modulator 75 .
- the projection optical system 7B projects, exposes, and forms an image of the pattern formed on the spatial light modulator 75 onto the substrate 10 .
- the projection optical system 7B includes a magnification adjustment unit 76 for adjusting the magnification for projecting one pixel of the spatial light modulator 75 with a predetermined size, and a focus by driving the lens in the Z direction. and a focus adjustment unit 77 that adjusts the
- the magnification adjustment unit 76 includes a magnification adjustment lens 761 that reduces the image from the spatial light modulator 75 to, for example, 1/2 to 1/10 times and projects it onto the focus adjustment unit 77 .
- the magnification adjustment unit 76 can slightly correct the projection magnification by driving the magnification adjustment lens 761 in the Z direction. Note that the projection magnification is not limited to reduction, and may be enlargement or equal magnification.
- the focus adjustment unit 77 collects the reflected light from the spatial light modulator 75 that has passed through the magnification adjustment unit 76 (reflected light from the mirror in the ON state) to focus the mirror in the ON state on the substrate surface 10a, which is the focal plane.
- a plurality of focus lenses 771 are provided to form optical images according to the distribution of .
- autofocus systems 23 are arranged on both sides of the projection optical system 7B in the X direction.
- the autofocus system 23 can measure the position of the substrate 10 in the Z direction prior to exposure processing regardless of the scanning direction (X direction) of the substrate 10 .
- the focus adjustment unit 77 drives the focus lens 771 based on the measurement result of the autofocus system 23 to adjust the focus of the pattern image of the spatial light modulator 75 .
- FIG. 6 is a side view showing a schematic configuration of the first alignment measurement system 5A provided on the substrate stage 4.
- the measurement system 5 includes a first alignment measurement system 5A provided on the substrate stage 4, and a second alignment measurement system 5B provided on the optical surface plate 21, as shown in FIG. ing.
- the first alignment measurement system 5A is embedded in the substrate stage 4 at a predetermined position.
- the first alignment measurement system 5A measures the position of the substrate 10 sucked by a holder (not shown) with respect to the substrate stage 4 .
- the first alignment measurement system 5A is arranged at least at the four corners of the substrate stage 4. As shown in FIG.
- the substrate stage 4 is provided with through holes 42 penetrating in the stage thickness direction at four corners where the first alignment measurement system 5A is provided.
- the first alignment measurement system 5A is arranged below the lens 511 arranged in the through-hole 42 of the substrate stage 4 and the lens 511, and directs measurement light to the substrate 10 placed at a predetermined position on the substrate stage 4. It has a light source 513 such as an LED that emits non-photosensitive light toward the alignment mark 12 and a measuring unit 512 that detects the light reflected by the alignment mark 12 .
- a light source 513 such as an LED that emits non-photosensitive light toward the alignment mark 12
- a measuring unit 512 that detects the light reflected by the alignment mark 12 .
- the positions of, for example, the four corners of the substrate 10 are measured, and the position in the X direction, the position in the Y direction, and the amount of rotation (the angle in the ⁇ Z direction) are measured. ), X-direction reduction/enlargement magnification, Y-direction reduction/enlargement magnification, and orthogonality are measured.
- the arrangement of the first alignment measurement system 5A on the substrate stage 4 is not limited to the four corners as described above.
- a considerable number of first alignment measurement systems 5A such as 4 locations.times.4 rows are arranged.
- the first alignment measurement system 5A is an off-axis alignment measurement system.
- the first alignment measurement system 5A measures the alignment mark 12 of the substrate 10 based on pixels such as CCD or CMOS provided in the measurement unit 512 .
- the substrate stage 4 has a calibration measurement system 52, an interferometer 53 for measuring the position of the substrate stage 4, and an illuminance measuring device .
- the calibration measurement system 52 , the interferometer 53 , and the illuminance measurement device 54 are acquisition units that acquire information about the light of the exposure unit 20 during or before the substrate 10 is exposed.
- the calibration measurement system 52 is used for measuring and calibrating the positions of various modules.
- the calibration measurement system 52 is also used to calibrate the second alignment measurement system 5B arranged on the optical surface plate 21 .
- the first alignment measurement system 5A in the substrate stage 4 measures the imaging position of the pattern generated by the spatial light modulator 75 that performs exposure.
- the position of the first alignment measurement system 5A on the substrate stage 4 with respect to the imaging system can be measured from the image position of the interferometer 53 for measuring the position of and the image position of the second alignment measurement system 5B.
- the second alignment measurement system 5B is arranged on the optical surface plate 21 at a position above the substrate stage 4. As shown in FIG. The second alignment measurement system 5B measures the position of the substrate 10 sucked by a holder (not shown) with respect to the substrate stage 4 .
- the second alignment measurement system 5B is directed toward the lens 551 arranged below the optical surface plate 21 and the alignment mark 12 of the substrate 10 arranged above the lens 551 and placed at a predetermined position on the substrate stage 4. and an optical sensor 552 that emits non-photosensitive measurement light, and a measurement unit (not shown) that detects light reflected by the alignment mark 12 .
- the second alignment measurement system 5B measures the X-direction position, the Y-direction position, the amount of rotation ( ⁇ Z-direction angle), X-direction reduction/enlargement magnification, Y-direction reduction/enlargement magnification, and orthogonality (positional information) are measured.
- the second alignment measurement system 5B is provided on the optical surface plate 21 apart from the illumination optical system 7A in the X direction.
- the substrate stage 4 moves to a position where the alignment mark 12 on the substrate 10 can be measured by the second alignment measurement system 5B.
- the second alignment measurement system 5B can measure the alignment marks 12 arranged on the substrate 10, so that the measurement can be performed on almost the entire surface of the substrate 10.
- a method of exposing the substrate 10 in the exposure apparatus 1 configured as described above will be described.
- the control system 9 shown in FIG. 1 selects mask data for exposure from the mask pattern server. Then, the control system 9 divides the mask data by the number of the exposure modules 7, generates divided mask data, and stores it in the memory.
- the spatial light modulator 75 updates 4 Mpixels at an update rate of approximately 10 kHz, for example, so the memory stores a large amount of mask data at high speed.
- the control system 9 transmits the mask data stored in the memory to each of the multiple exposure modules 7 .
- the exposure module 7 makes various preparations for exposure. That is, exposure module 7 loads the received mask data into spatial light modulator 75 .
- the exposure apparatus 1 measures and calibrates the illuminance (light information) according to the recipe.
- the illuminance meter 54 arranged on the substrate stage 4 measures the illuminance of light from the illuminance measurement pattern generated on the spatial light modulator 75 .
- the exposure apparatus 1 uses each of the plurality of exposure modules 7 and uses the measurement result of the measured illuminance, and the illumination wedge 722 arranged in the illumination optical system 7A adjusts the illuminance so that the illuminance difference between the exposure modules 7 is eliminated. adjustment.
- the exposure apparatus 1 adjusts the exposure positions of the second alignment measurement system 5B arranged on the optical surface plate 21, the illumination optical system 7A and the projection optical system 7B to the calibration measurement system 52.
- the calibration measurement system 52 measures the arrangement of the illumination optical system 7A and projection optical system 7B and the position of the second alignment measurement system 5B (microscope), and measures the illumination optical system 7A and projection optical system 7B and the second alignment measurement system 7A and projection optical system 7B. A relative positional relationship with the measurement system 5B (microscope) is calculated.
- the position of the first alignment measurement system 5A provided on the substrate stage 4 is measured based on the pixels of the camera of the measurement unit 512 shown in FIG.
- the first alignment measurement system 5A performs measurement using an exposure pattern (for example, a test pattern) of the spatial light modulator 75 projected by the projection optical system 7B.
- the exposure apparatus 1 calculates the relative positional relationship between the illumination optical system 7A, the projection optical system 7B, and the first alignment measurement system 5A based on the measurement results.
- the substrate exchange section 3 places the substrate 10 for exposure on the substrate stage 4 as shown in FIG.
- the first alignment measurement system 5A observes and measures the alignment mark 12 of the substrate 10, and calculates the relative position of the first alignment measurement system 5A with respect to the substrate 10 with respect to the apparatus.
- the substrate stage 4 moves below the second alignment measurement system 5B, the second alignment measurement system 5B observes and measures the alignment mark 12 of the substrate 10, and the second alignment measurement system 5B with respect to the substrate 10 Calculate the relative position.
- the control system 9 corrects the exposure data in order to correct this shift amount. It should be noted that the control system 9 may not only perform correction using the exposure data, but also move the substrate stage 4 itself to reduce the amount of deviation, and then generate correction data. In this case, the correction amount of data correction by the control system 9 can be reduced.
- control system 9 may move the spatial light modulator 75 to change the exposure position on the substrate 10 .
- the control system 9 may correct the deviation amount by data correction and movement of the substrate stage 4, or may correct the deviation amount by data correction and movement of the spatial light modulator 75, or may correct the deviation amount by data correction and movement of the spatial light modulator 75.
- the shift amount may be corrected by a combination of movement of the substrate stage 4 and movement of the spatial light modulator 75 .
- the exposure apparatus 1 it is also possible to calculate the correction value for each panel of the substrate 10, such as a liquid crystal television, and obtain the correction value for the substrate stage 4.
- FIG. In the case of partially correcting the substrate 10 in this way, the correction values are almost always different for the illumination optical system 7A and the projection optical system 7B. Calculate and correct the digital exposure data to be exposed.
- the control system 9 is connected to each part of the exposure apparatus 1 (the measurement system 5, the substrate stage 4, the optical system (the illumination optical system 7A, the projection optical system 7B, and the modulation section 7C)), and transmits and receives measurement values and controls the exposure apparatus 1. It has a control unit for issuing control operation commands to each part of the unit.
- the control system 9 also has a data generator that generates digital exposure data (control data) for driving the spatial light modulator 75 .
- the control unit has a correction function for correcting the digital exposure data based on the measurement results of the measurement system 5.
- Correction data for the digital exposure data is stored in the memory of the control system 9 .
- This control system 9 is incorporated in, for example, a personal computer or the like.
- the exposure apparatus 1 performs overlay exposure on the substrate 10 on the substrate stage 4 based on the correction data of the digital exposure data and recipe information transmitted from the control system 9 .
- the control system 9 uses, for example, light information such as illuminance measured by an illuminance measuring device 54 or a calibration measuring system 52 provided on the substrate stage 4 during exposure as correction data, and the exposure module 7 is based on this correction data. Illumination can be adjusted. Information about the light at this time is sent to the exposure module 7 before starting data correction of the substrate stage 4 . It is also possible to transmit the above light information to the exposure module 7 while data correction is being performed on the substrate stage 4 .
- the exposure apparatus 1 in addition to array measurement of the plurality of illumination optical systems 7A and projection optical systems 7B, measurements related to exposure positions and data correction are performed in advance. By correcting the bending (straightness) of the movable mirror that does not move, the calculation of the correction value based on the data and the transmission of the correction data can be performed during the exposure operation. In this way, it is possible to transmit the data considering the alignment of the substrate 10 and the arrangement of the modules without affecting the takt time.
- a predetermined exposure pattern is formed in advance on the substrate 10 to be exposed by the exposure device 1 . That is, the exposure apparatus 1 performs second and subsequent exposures (hereinafter referred to as 2nd exposures) on the substrate 10 .
- the first exposure (hereinafter referred to as 1st exposure) is performed by an exposure device 8 that performs exposure using a mask shown in FIG. That is, the maskless exposure apparatus 1 using the spatial light modulator 75 performs the 2nd exposure on the substrate 10 while supporting and moving the substrate 10, which has been subjected to the 1st exposure by the mask exposure apparatus 8, on the substrate stage 4. Then, superimposed exposure is performed.
- FIG. 7 is a perspective view showing a schematic configuration of the exposure device 8. As shown in FIG. As shown in FIG. 7, the exposure device 8 exposes the pattern (fixed pattern) formed on the mask M (see FIG. 8) onto the substrate 10 .
- the exposure apparatus 8 includes a substrate stage 80 that supports and moves the substrate 10, a light source unit 81 that irradiates light, an illumination optical system 82, a mask stage 83 that supports and moves the mask M, and a projection optical system 84. and have.
- FIG. 8 is a plan view showing a scanning layout of the substrate 10 by the exposure device 8.
- the exposure device 8 exposes the substrate 10 through the mask M to the first exposure pattern 85 formed by the projection optical system 84 .
- the mask M and the substrate 10 are provided in an optically conjugate relationship via the projection optical system 84 .
- the first exposure pattern 85 includes first exposure portions 85A arranged at predetermined intervals in the Y direction as a first row, and first exposure portions 85A spaced apart from the first row in the X direction and at a predetermined interval in the Y direction as a second row. and a second exposed portion 85B arranged with a space therebetween.
- the first exposed portion 85A and the second exposed portion 85B are each formed in an isosceles trapezoidal shape having two sides parallel to the Y direction.
- the first exposed portion 85A and the second exposed portion 85B are formed such that the ends (diagonal sides) adjacent to each other in the Y direction face each other in the X direction.
- the first exposed portion 85A and the second exposed portion 85B are arranged so that the ends (diagonal sides) adjacent to each other in the Y direction overlap each other in the Y direction.
- the joint portion 85C (in FIG. 8, A region sandwiched by two lines) is formed.
- the exposure apparatus 8 joins the first exposed portion 85A and the second exposed portion 85B formed by the projection optical system 84 by the joining portion 85C, thereby exposing the substrate 10 without gaps.
- the scanning operation for moving the substrate stage 80 and the mask stage 83 relative to the projection optical system 84 in the X direction and the substrate stage 80 relative to the mask stage 83 in the Y direction and the X direction are performed.
- the entire surface of the substrate 10 is exposed while repeating the step movement.
- the size of the mask M is not limited to 1/4 times the size of the substrate 10, as shown in FIG.
- the mask M can be 1/6 or 1/8 times as large.
- FIG. 9 is a plan view showing a scan layout of the substrate 10 by the maskless exposure apparatus 1.
- the maskless exposure apparatus 1 uses the projection optical system 7B to move the substrate 10 in the X direction to four exposure regions R1 of the substrate 10 exposed with the first exposure pattern 85.
- Two exposure patterns 90 are superimposed and exposed.
- An exposure region R2 of the substrate 10 shown in FIG. 9 indicates a region where the first exposure pattern 85 is overlapped with the second exposure pattern 90 and exposed.
- the exposure region R1 on the right half of the paper surface shows the exposure result of the 1st exposure by the exposure device 8
- the exposure region R2 on the left half of the paper surface shows the exposure result of the 2nd exposure by the exposure device 1.
- the exposure apparatus 1 does not have restrictions on the size of the mask M and the apparatus, and can freely lay out the second exposure patterns 90.
- FIG. The second exposure pattern 90 exposes the entire surface of the substrate 10 by connecting the ends of the second exposure patterns 90 that are rectangular in plan view and are adjacent in the Y direction.
- step-and-scan type exposure apparatus 8 exposure is performed by synchronously moving the mask stage 83 on which the mask M is placed and the substrate stage 80 on which the substrate 10 is placed in the X direction (scanning direction). conduct. At this time, as the size of the mask M and the substrate 10 increases, it is becoming difficult to control the trajectory of the mask M and the substrate 10 by matching them with high accuracy. Deviation from the trajectory (feed error) occurs. This feed error of the exposure device 8 is a factor that causes an exposure deviation (splicing unevenness) at the splice portion 85C of the first exposed portion 85A of the first row of the first exposure pattern 85 and the second exposed portion 85B of the second row of the first exposure pattern 85. becomes.
- FIG. 10A and 10B are explanatory diagrams showing the state of the joint portion of the exposure image formed on the substrate 10 by the exposure device 8.
- FIG. 10 the state of the joint portion of the exposure image formed on the substrate 10 by scanning and exposing the linear patterns PM1, PM2, and PM3 connected in the Y direction on the mask M in the exposure device 8 is shown.
- (A) of FIG. 10 shows the arrangement of the patterns PM1 to PM3 of the mask M, the first exposed portion 85A and the second exposed portion 85B at a certain time during the scanning exposure
- (B) of FIG. 2 shows exaggerated states of exposure images (resist images) PM1', PM2', and PM3' of patterns PM1 to PM3 exposed on the substrate 10 in .
- the first exposed portion 85A and the second exposed portion 85B are projection areas (projected images) 85A and 85B projected onto the substrate 10 via the respective projection optical systems 84.
- Most of the splicing errors are caused by slight deviations in the XY directions from the prescribed relative positional relationship between the projection areas 85A and 85B which are spliced and exposed in the Y direction.
- the projection area 85A is shifted from the prescribed position by ⁇ Xd in the X direction and by ⁇ Yd in the Y direction.
- splicing errors occur in the entire pattern of the first layer (1st layer) formed on the substrate 10 by the splicing exposure type exposure device 8. From a different perspective, this can be explained as follows. It means that a pattern portion whose position is slightly changed or a pattern portion whose shape is slightly changed occurs in the entire pattern.
- the maskless exposure apparatus 1 is used to expose a pattern for the second layer to be overlaid on the first layer, the pattern data is generally created based on the pattern of the mask M for the first layer.
- the maskless exposure apparatus 1 performs overlay exposure based on the pattern data created for the second layer.
- the alignment accuracy and the positional accuracy of the stages are good, sufficient overlay accuracy can be obtained in any part of the entire pattern on the substrate 10 .
- FIG. 11 is an explanatory diagram exaggerating the relationship between the first exposure pattern 85 by the exposure device 8 and the second exposure pattern 90 by the maskless exposure device 1 .
- the first exposure pattern 85 has a joint portion 85C where a first exposure portion (projection region) 85A and a second exposure portion (projection region) 85B are jointed.
- a plurality of circles shown in (B) of FIG. 11 indicate the center of each projected image by the projection optical system 84 that generates the first exposed portion (projection region) 85A and the second exposed portion (projection region) 85B.
- the position that is, the center coordinates of each exposure module of the exposure device 8) is shown.
- the circles shown in (B) of FIG. 11 indicate that there is a splicing error and that the position is relatively shifted only in the X direction (scanning movement direction).
- the projection areas 85A and 85B are displaced by ⁇ Xd as described with reference to FIG.
- the maskless exposure apparatus 1 exposes the first exposure pattern 85 with the second exposure pattern 90 superimposed thereon.
- a plurality of circles shown in (C) of FIG. 11 are centers of projection images of the spatial light modulator 75 projected by each of the plurality of projection optical systems 7B of the maskless exposure apparatus 1 that exposes the second exposure pattern 90.
- the position (that is, the center coordinates of each exposure module 7 of the maskless exposure apparatus 1) is shown.
- At least one of the pattern images (divided images) exposed by each projection optical system 7B in the second exposure pattern 90 is formed at a corresponding position within the joint portion 85C in the first exposure pattern 85 .
- the image is set to be displaced in the X direction by ⁇ Xd.
- the center position of the pattern formed on the substrate 10 is shifted in the X direction by ⁇ Xd/2, as described with reference to FIG. . Accordingly, the position of the projection image from the module 7 that exposes the inside of the joint portion 85C is also corrected by ⁇ Xd/2.
- the maskless exposure apparatus 1 includes a plurality of exposure modules 7 arranged side by side in the Y direction, as shown in FIG. That is, at least one of the plurality of exposure modules 7 is arranged to expose the joint portion 85C.
- the exposure width 101 in the Y direction of the projection area by the exposure module 7 that exposes the joint portion 85C is smaller than the exposure width 102 of the joint portion 85C.
- the exposure module 7 that exposes the joint portion 85C sets the projection magnification of the projection optical system 7B so that the exposure width 101 is smaller than the exposure width 102 of the joint portion 85C.
- the exposure module 7 that exposes the joint portion 85C exposes the joint portion 85C with the second exposure pattern 90, and correction corresponding to the joint unevenness of the joint portion 85C can be performed. That is, in the entirety of the first exposure pattern 85 already formed on the substrate 10, the overlay error due to the local relative positional deviation caused by the splicing error (splicing unevenness) is corrected.
- the exposure width 101 in the Y direction by each exposure module of the maskless exposure apparatus 1 that exposes the second exposure pattern 90 is the projection area of one of the projection optical systems 84 of the exposure apparatus 8 that exposes the first exposure pattern 85. It is smaller than the exposure width 100 in the Y direction except for the inner joint portion 85C.
- the first exposure pattern 85 has a plurality of joint portions 85C at a first interval P1 in the non-scanning direction (Y direction) orthogonal to the scanning direction (X direction) in the plane direction along the substrate 10 .
- the second exposure pattern 90 has a plurality of divided images of the second exposure pattern 90 at a second interval P2 smaller than the first interval P1 in the same non-scanning direction (Y direction). That is, the plurality of exposure modules 7 are arranged at a second interval P2 smaller than the first interval P1 in the non-scanning direction (Y direction).
- the second interval P2 is smaller than the exposure width 102 of the joint portion 85C.
- the second interval P2 in this embodiment is half the exposure width 102 of the joint portion 85C, but it may be less than that.
- the maskless exposure apparatus 1 performs an alignment operation before exposing the second exposure pattern 90 .
- the alignment operation is performed before the 2nd exposure, and is an operation for overlapping the exposure position of the 2nd exposure with the exposure position of the 1st exposure by measuring the position of the 1st exposure via the alignment mark 12 .
- the maskless exposure apparatus 1 corrects the exposure positions of the plurality of exposure modules 7 based on the measurement results of the measurement system 5 (for example, the first alignment measurement system 5A and the second alignment measurement system 5B).
- FIG. 12 is an explanatory diagram showing the relationship between the first exposure pattern 85 by the exposure device 8 and the alignment marks 120 formed therearound.
- FIG. 13 is an explanatory diagram showing alignment marks 12 formed around the substrate 10. As shown in FIG. Alignment marks 12 indicated by circles in FIG. 13 are measured by the first alignment measurement system 5A provided on the substrate stage 4 as shown in FIG. .
- the first exposure pattern 85 has a joint portion 85C where the first exposed portion 85A and the second exposed portion 85B are joined together.
- Alignment marks 120 indicated by circles in FIG. 12B are formed in pairs on both sides of each exposed portion at the same time as the first exposure pattern 85 during the 1st exposure.
- the alignment mark 120 is measured, for example, by a second alignment measurement system 5B provided on the optical surface plate 21. As shown in FIG.
- the position of the first exposure pattern 85 in the X direction, the position in the Y direction, and the angle ⁇ in the ⁇ Z direction can be determined.
- the projection magnification ⁇ , etc., and the correction value of the second exposure pattern 90 of the exposure module 7 can be calculated.
- one or more alignment marks 120 are also formed on the joint portion 85C, so that the position of the joint portion 85C can also be measured.
- no alignment mark 120 is formed in the splice portion 85C, but the pair of alignment marks 120 formed sandwiching the exposed portions of the first exposure pattern 85 are aligned relative to each other. From the coordinates, the position of the joint portion 85C can be estimated and calculated.
- the maskless exposure apparatus 1 corrects the exposure positions of the plurality of exposure modules 7 based on the measurement results of the measurement system 5 (eg, the first alignment measurement system 5A and the second alignment measurement system 5B). .
- the measurement system 5 eg, the first alignment measurement system 5A and the second alignment measurement system 5B.
- the optical members in the projection optical system 7B are moved for each exposure module 7 based on the measured deviation amount, and the (exposure start) position of the projection area on the substrate 10 is adjusted to the exposure position.
- a correction that adjusts for each module 7 may be performed.
- the position of the projection area on the substrate 10 is adjusted for each exposure module 7 by moving the spatial light modulator 75 for each exposure module 7 based on the measured deviation amount. It is good as As described above, the correction method includes the spatial light modulator 75, and mechanical, optical, and data correction can be applied. Since it is difficult to convert a large amount of data at high speed in a short time, it is mainly corrected mechanically and optically.
- the start of exposure can be adjusted for each exposure module 7, and the second exposure pattern 90 can be adjusted to the position where the joint portion 85C is exposed. can be overlaid and exposed.
- the second exposure pattern 90 is moved in the scanning direction while the substrate 10 exposed with the first exposure pattern 85 in which the first exposure portion 85A and the second exposure portion 85B are spliced together is moved.
- the exposure apparatus 1 performs exposure by overlapping one exposure pattern 85, and includes a plurality of exposure modules 7 that divide and expose a second exposure pattern 90.
- the plurality of exposure modules 7 each have a plurality of elements and a second exposure pattern.
- a spatial light modulator 75 having a plurality of elements controlled according to an exposure pattern 90, an illumination optical system 7A for illuminating the spatial light modulator 75, and a spatial light modulator 75 controlled according to a second exposure pattern 90.
- a projection optical system 7B for projecting the image of the image onto the substrate 10, and at least one of the plurality of exposure modules 7 exposes a spliced portion 85C where the first exposed portion 85A and the second exposed portion 85B are spliced together. do.
- the first exposure pattern 85 is exposed.
- a second exposure pattern 85 projected from at least one of a plurality of exposure modules 7 having spatial light modulators 75 onto a splice portion 85C where a first exposure portion 85A and a second exposure portion 85B are spliced together.
- a projection image of a part of the exposure pattern 90 can be exposed finely with high precision. As a result, it is possible to perform correction corresponding to positional deviation due to joint unevenness (joint error) occurring in the first exposure pattern 85, and to perform exposure with a small overlay error for each local portion of the entire second exposure pattern 90.
- the exposure width 101 of the exposure module 7 that exposes the joint portion 85C is smaller than the exposure width 102 of the joint portion 85C.
- the exposure module 7 that exposes the spliced portion 85C has the size of the spatial light modulator 75 and the projection optical system so that the exposure width 101 is smaller than the exposure width 102 of the spliced portion 85C.
- a projection magnification of 7B is set.
- the exposure width 101 of the exposure module 7 for exposing the joint portion 85C can be easily adjusted to the joint portion 85C. can be smaller than the exposure width 102 of .
- the plurality of exposure modules 7 are spaced apart from the first interval P1 at which the plurality of joint portions 85C are formed on the first exposure pattern 85 in the non-scanning direction orthogonal to the scanning direction. A plurality of them are arranged at a small second interval P2.
- the second interval P2 between the projection areas of the spatial light modulators 75 by the exposure modules 7 adjacent in the Y direction is smaller than the first interval P1 between the joint portions 85C.
- One or more projected images of the spatial light modulator 75 can be exposed within the splice 85C.
- the measurement system 5 measures the position of the spliced portion 85C, and based on the measurement results of the measurement system 5, a plurality of exposures are performed. and a control unit (control system 9 ) that controls the exposure position of the second exposure pattern 90 by the module 7 .
- the start of exposure can be adjusted for each exposure module 7, and the second exposure pattern 90 can be superimposed on the exposed position of the joint portion 85C.
- the data generation unit (control system 9) that generates control data for controlling the plurality of elements according to the second exposure pattern 90 is provided, and the control unit generates the measurement result of the measurement system 5 , at least one of the projection optical system 7B, the spatial light modulator 75, and the data generator is controlled, and the exposure positions of the second exposure pattern 90 by the plurality of exposure modules 7 are controlled.
- At least one of the projection optical system 7B, the spatial light modulator 75, and the data generator is controlled according to the measurement result by the measurement system 5, and the exposure position is controlled for each exposure module 7. Then, by exposing each of the pattern portions of the second exposure pattern 90 divided into a plurality of parts onto the substrate 10, an overlay error caused by a positional deviation in the first exposure pattern 85 on the substrate 10 caused by joint unevenness can be eliminated. can be reduced.
- the controller corrects the control data of the data generator based on the measurement result of the measurement system 5 .
- the exposure position of the exposure module 7 can be controlled by correcting the control data (digital exposure data) of the spatial light modulator 75 .
- the controller corrects at least one of the projection position, rotation, and projection magnification of the second exposure pattern 90 by the projection optical system 7B based on the measurement result of the measurement system 5 .
- the measurement system 5 includes the first alignment measurement system 5A and the second alignment measurement system 5B that measure the alignment marks 12 and 120 formed on the substrate 10 together with the first exposure pattern 85. .
- the exposure position of the exposure module 7 can be corrected based on the measurement results of the alignment marks 12 and 120.
- the exposure apparatus 1 exposes the second exposure pattern 90 over the first exposure pattern 85 while moving the substrate 10 exposed with the first exposure pattern 85 in the scanning direction.
- a plurality of exposure modules 7 for dividing and exposing the second exposure pattern 90; a detection unit for detecting a predetermined area of the first exposure pattern 85 whose exposure state is different from that of other areas; an adjustment unit that adjusts the exposure module 7 based on the result, wherein the plurality of exposure modules 7 have a plurality of elements, and the plurality of elements are controlled according to the second exposure pattern 90.
- a spatial light modulator is dividing and exposing the second exposure pattern 90.
- an illumination optical system 7A that illuminates the spatial light modulator 75
- a projection optical system 7B that projects an image of the spatial light modulator 75 controlled according to the second exposure pattern 90 onto the substrate 10.
- at least one of the plurality of exposure modules 7 adjusted by the adjustment unit exposes a predetermined area.
- the predetermined region particularly refers to the joint portion 85C in the first exposure pattern 85, but the position of the pattern of the first layer (underlying layer) on the substrate 10 other than the joint portion 85C It includes areas with conspicuous misalignment and areas whose exposure state (imaging state) is different from other areas.
- the detection unit that detects a predetermined region in the first exposure pattern 85 whose exposure state is different from that of other regions is the above-described measurement system 5 and control for detecting the predetermined region according to the measurement result of the measurement system 5.
- the adjustment unit includes the control system 9 described above and a portion capable of applying mechanical, optical, and data correction under the control of the control system 9 .
- the exposure apparatus 1 having such a configuration, when the substrate 10 exposed with the first exposure pattern 85 is moved in the scanning direction and the second exposure pattern 90 is overlapped and exposed, the exposure state on the substrate 10 changes.
- a part of the second exposure pattern 90 is positioned and exposed with high accuracy from at least one of the plurality of exposure modules 7 having the spatial light modulator 75 so as to be superimposed on the pattern in the area different from other areas. can do.
- the 1st exposure is performed by the maskless exposure apparatus 8, and the 2nd exposure is performed by the maskless exposure apparatus 1.
- the 1st exposure is performed by the maskless exposure apparatus 1
- the 2nd exposure may be performed by an exposure device 8 that performs exposure using a mask. In this case, the following configuration should be adopted.
- the exposure apparatus 1 that exposes the first exposure pattern while moving the substrate 10 in the scanning direction, and has a plurality of elements, and spatial light modulation in which the plurality of elements are controlled according to the first exposure pattern 85.
- an illumination optical system 7A that illuminates the spatial light modulator 75; and a projection optical system 7B that projects an image of the spatial light modulator 75 controlled according to the first exposure pattern 85 onto the substrate 10.
- Information about the exposure module 7 and another mask exposure device 8 that exposes the substrate 10 exposed with the first exposure pattern with the second exposure pattern superimposed on the first exposure pattern is transmitted to the substrate 10 with the first exposure pattern. It comprises a receiver for receiving prior to exposure on top and an adjuster for adjusting the exposure module 7 based on the information received by the receiver.
- the first exposure pattern referred to here is formed by the 1st exposure of the maskless exposure apparatus 1 .
- the second exposure pattern referred to here is formed by the second exposure of the exposure device 8 .
- the receiving unit includes the control system 9 (at least the receiver) of the maskless exposure apparatus 1 that can communicate with the exposure apparatus 8 .
- the adjusting section includes the above-described control system 9 and a section capable of applying mechanical, optical, and data correction under the control of the control system 9 . According to this configuration, the maskless exposure device 1 performs the 1st exposure, and the exposure device 8 performs the 2nd exposure.
- the maskless exposure device 1 dares to cause the exposure unevenness in the 1st exposure stage.
- the position of the projected image of the exposure pattern of the 1st exposure is corrected in a state in which exposure unevenness occurring in the 2nd exposure of the mask exposure device 8 is predicted.
- the projection area 85A is displaced by ⁇ Yd from the prescribed position in the Y direction, and the pattern center position in the splice portion 85C is displaced in the Y direction.
- the maskless exposure apparatus 1 receives information that the 2nd exposure will be performed by the exposure apparatus 8, position information of the joint portion when exposure is performed by the exposure apparatus 8, and exposure at the joint portion. Receives information on unevenness prediction (information on splicing error of prediction).
- the maskless exposure apparatus 1 has a receiver that receives such a series of information.
- the maskless exposure apparatus 1 creates, for example, data for controlling the spatial light modulator 75 and/or controls the exposure module 7 based on the information obtained by its receiving unit, thereby correcting uneven exposure (corresponding to splicing error). positional deviation of the exposed image) is intentionally generated.
- the receiving unit receives information about the position on the substrate 10 where the exposure apparatus splices a portion of the first exposed portion and a portion of the second exposed portion.
- the adjustment unit adjusts the exposure module 7 based on the information.
- the exposure unevenness due to the joint error or the like between the first exposed portion and the second exposed portion that may occur when performing the second exposure with the exposure device 8 that uses a mask for exposure is predicted.
- exposure unevenness is the same as in the first embodiment, but in addition to splicing errors (splice unevenness), exposure amount unevenness in which the exposure amount varies in a partial area on the substrate 10, and the substrate 10
- Exposure amount unevenness and focus unevenness cause the pattern line width formed on the substrate 10 to differ from the design value (target value).
- the device manufacturing method of the above embodiment includes exposing the substrate 10 using the exposure apparatus 1 and developing the exposed substrate 10 .
- the method of manufacturing a flat panel display according to the above embodiment includes exposing the flat panel display substrate 10 using the exposure apparatus 1 and developing the exposed substrate 10. .
- a flat panel display can be manufactured with uniformly reduced .
- the electronic device formed on the substrate 10 is not limited to a display panel such as a flat panel display. , a substrate on which a large number of sensor chips (functional elements) are collectively formed.
- the alignment system is provided at a position apart from the projection optical system 7B in the X direction, that is, off-axis alignment in which the optical axis of the projection optical system 7B and the alignment axis are misaligned has been described.
- off-axis alignment in which the optical axis of the projection optical system 7B and the alignment axis overlap, and alignment with a configuration of TTL (Through the lens) measured via the projection optical system 7B may be used together.
- the spatial light modulator 75 includes a liquid crystal element, a digital mirror device (digital micromirror device, DMD), a magneto-optical light modulator (Magneto Optic Spatial Light Modulator, MOSLM), and the like.
- the spatial light modulator 75 may be of a reflection type that reflects the illumination light from the illumination optical system 7A, a transmission type that transmits the illumination light, or a diffraction type that diffracts the illumination light.
- the spatial light modulator 75 can spatially and temporally modulate the illumination light.
- the exposure device 8 performs the 1st exposure and the exposure device 1 performs the 2nd exposure, but the method is not limited to this.
- a method in which the exposure device 8 performs the 1st exposure and the 2nd exposure, and the maskless exposure device (exposure device 1) performs the 3rd exposure may be used.
- the 1st exposure is not limited to exposure by the exposure device 8 as in the first embodiment.
- the exposure apparatus 1 may be used for the 1st exposure.
- the maskless exposure apparatus 1 may be used for the 1st exposure, and the 2nd exposure may be performed by the exposure apparatus 8 .
- FIG. 14 is a front view showing an example of an exposure device 8 that performs exposure using a mask according to Modification 1.
- the exposure device 8 may be a mirror projection type scanning exposure device having an arcuate projection area SF extending in the Y direction.
- the substrate 10 is moved so that the left half portion of the exposure region R1 on the substrate 10 is scanned and exposed in the projection region SF along the scanning locus SL1.
- the substrate 10 is moved stepwise in the Y direction, and then moved again so that the right half of the exposure area R1 is scanned and exposed in the projection area SF along the scanning locus SL2.
- a joint portion 85C may be formed in the central portion of the exposure region 8. Therefore, at the end portion of the arc-shaped projection area SF that overlaps with the joint portion 85C, the illuminance distribution of the illumination light to the mask in the Y direction is set to be smoothly inclined. Even when such an exposure device 8 is used, there is a possibility that exposure unevenness (such as splicing error) will occur. Therefore, by combining with the maskless exposure apparatus 1 having a plurality of projection areas sufficiently smaller than the width of the projection area SF in the Y direction as shown in FIG. can be manufactured.
- FIG. 15 is an explanatory diagram showing the positional relationship of alignment marks in the exposure apparatus 8 that performs exposure using the mask according to Modification 2.
- the exposure device 8 is provided with a plurality of alignment systems.
- a rectangular exposure area R1 for a display or the like is arranged on the substrate 10, and a plurality of alignment marks M1, M2, . . . M8 are arranged around the exposure area R1.
- eight marks M1 to M8 are arranged at predetermined intervals in the Y direction near the +X direction end and the ⁇ X direction end of the exposure region R1.
- This positional relationship includes positional deviation errors due to splicing errors ( ⁇ Xd, ⁇ Yd in FIG. 10). Therefore, when the maskless exposure apparatus 1 shown in FIGS. By detecting the positional relationship of each of the marks M1 to M8 using the second alignment measurement system 5B, the extent of the splicing error can be measured.
- a plurality of trapezoidal projection areas by the projection optical system 84 are spliced in the Y direction orthogonal to the scanning direction (X direction) for exposure. It can also be used in such a way as to perform patch exposure with respect to the scanning direction.
- the second mask pattern is transferred to about the remaining half of the region by the second scanning exposure. to transcribe. At that time, the first mask pattern and the second mask pattern transferred onto the substrate 10 are spliced together in the X direction.
- Such a splicing method is also called scan splicing exposure.
- splicing errors occur between the patterns spliced on the substrate 10 in the X direction.
- this method it is possible to perform superimposing with finely corrected positional deviations caused by splicing errors with high accuracy during superimposition exposure by the maskless exposure apparatus 1 .
- Appendix 2 one of the first pattern and the second pattern is exposed to light through a mask; The device manufacturing method according to appendix 1, wherein the other of the first pattern and the second pattern is exposed to light through a spatial light modulator.
- the device manufacturing method according to appendix 2 comprising: [Appendix 4] exposing a first pattern onto a substrate through a first projection optical system; exposing a second pattern via a second projection optical system onto the substrate on which the first pattern has been exposed (on the substrate on which a circuit pattern is formed based on the first pattern); including one of the first pattern and the second pattern is exposed to light through a mask;
- the device manufacturing method wherein the other of the first pattern and the second pattern is exposed to light through a spatial light modulator.
- Exposure apparatus 5 Measurement system 5A First alignment measurement system 5B Second alignment measurement system 6 Light source unit 7 Exposure module 7A Illumination optical system 7B Projection optical system 7C Modulator 8 Mask exposure device 9 Control system 10 Substrate 12 Alignment mark 75 Spatial light modulator 80 Substrate stage 81 Light source unit 82 Illumination optical system 83 Mask stage , 84... Projection optical system, 85... First exposure pattern, 85A... First exposure part, 85B... Second exposure part, 85C... Joint part, 90... Second exposure pattern, 100... Exposure width, 101... Exposure width, Reference numerals 102: exposure width, 120: alignment mark, P1: first interval, P2: second interval, R1: exposure area, R2: exposure area, ⁇ : projection magnification, ⁇ : angle
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Abstract
Description
本願は、2021年7月5日に出願された日本国特願2021-111777号に基づき優先権を主張し、その内容をここに援用する。
露光装置1は、光学系を介して基板10を露光する装置である。露光装置1は、空間光変調器75(図2参照)で変調した光を投影光学系7Bに通し、この光による像を感光材料(レジスト)上に結像させて露光する。その際、空間光変調器75と基板10とは、投影光学系7Bを介して光学的に共役な関係に設けられる。基板10は、例えば、表面にレジストを塗布したディスプレイ用のガラス基板である。
図2に示すように、露光ユニット20は、照明光学系7Aと、投影光学系7Bと、変調部7Cと、を備える露光モジュール7を複数備えている。
露光モジュール7は、図1に示すように、Y方向に所定間隔で配置されてモジュール列を形成している。また、露光モジュール7のモジュール列は、X方向に間隔をあけて複数(図1では4列)形成されている。なお、各モジュール列の各露光モジュール7は、Y方向においてずれて配置されている。
図3に示すように、照明光学系7Aは、光ファイバ71と、コリメートレンズ721と、照明ウェッジ722と、フライアイレンズ723と、メインコンデンサーレンズ724と、ミラー725と、を備えている。
図4に示すように、空間光変調器75の個々の素子は、X軸周りの回転とY軸周りの回転とが可能とされている。
図5の(A)は、空間光変調器75の電源が入っていない状態のときの素子の動作を示している。図5の(A)に示す状態のとき、素子は、X軸周り、Y軸周りのいずれにも回転していない。
フォーカス調整部77は、倍率調整部76を通った空間光変調器75からの反射光(ON状態のミラーからの反射光)を集光して焦点面である基板面10a上にON状態のミラーの分布に応じた光像を結像する複数のフォーカスレンズ771を備えている。
図6に示すように、計測系5は、基板ステージ4に設けられる第1アライメント計測系5Aと、図2に示すように、光学定盤21に設けられる第2アライメント計測系5Bと、を備えている。
先ず、露光装置1に露光するためのレシピが投入されると、図1に示す制御系9は、露光するためのマスクデータをマスクパターンサーバーより選択する。そして、制御系9は、マスクデータを露光モジュール7の数に分割し、分割したマスクデータを生成し、メモリに格納する。
図7に示すように、露光装置8は、マスクM(図8参照)上に形成されたパターン(固定パターン)を基板10上に露光する。露光装置8は、基板10を支持して移動させる基板ステージ80と、光を照射する光源ユニット81と、照明光学系82と、マスクMを支持して移動させるマスクステージ83と、投影光学系84と、を備えている。
図9に示すように、マスクレスの露光装置1は、第1露光パターン85が露光された基板10の4つの露光領域R1に、基板10をX方向に移動させながら、投影光学系7Bによって第2露光パターン90を重ねて露光する。なお、図9に示す基板10の露光領域R2は、第1露光パターン85に第2露光パターン90が重ねて露光された領域を示す。
また、図8、図9に示した第1露光部分85Aを露光する投影光学系84と、第2露光部分85Bを露光する投影光学系84との間の光学特性の僅かな違い、各投影光学系84の温度変化による機械的なドリフトや振動等によっても継ぎムラが生じる。
次に、この対策について説明するが、その前に継ぎムラの発生状態について簡単に説明する。
従って、基板10上の第1層の全体パターン中に許容範囲外となる継ぎ誤差(継ぎムラ)が無ければ、第2層用に作成されたパターンデータに基づくマスクレス露光装置1による重ね合わせ露光でも、アライメント精度やステージ類の位置精度が良好なら、基板10上の全体パターン中のどの部分でも、十分な重ね合わせ精度が得られることになる。
図11の(A)に示すように、第1露光パターン85は、第1露光部分(投影領域)85Aと第2露光部分(投影領域)85Bとが継ぎ合わされている継ぎ部85Cを有している。図11の(B)中に示す複数の丸印は、第1露光部分(投影領域)85A、及び第2露光部分(投影領域)85Bの各々を生成する投影光学系84による各投影像の中心位置(すなわち露光装置8の各露光モジュールの中心座標)を示している。図11の(B)に示す丸印は、継ぎ誤差が発生しているものとし、相対的にX方向(走査移動方向)のみに位置ずれしているものとする。例えば、投影領域85A、85Bの間では、図10で説明したようにΔXdだけ位置ずれしている。
図13にて丸印で示すアライメントマーク12は、上述した図6に示すように基板ステージ4に設けられた第1アライメント計測系5Aによって計測し、基板10に対する基板ステージ4の相対位置を算出する。
なお、図12の(C)に示す例では、継ぎ部85Cにはアライメントマーク120が形成されていないが、第1露光パターン85の各露光部分を挟んで形成された一対のアライメントマーク120の相対座標から、継ぎ部85Cの位置を推定して算出することができる。
このような構成の露光装置1では、第1露光パターン85が露光された基板10を走査方向に移動させながら、第2露光パターン90を重ねて露光する際に、基板10上での露光状態が他の領域とは異なる領域内のパターンに重ね合わされるように、空間光変調器75を備える複数の露光モジュール7の少なくとも一つから第2露光パターン90の一部を高精度に位置決めして露光することができる。
この構成によれば、1st露光をマスクレスの露光装置1で行い、2nd露光を露光装置8で露光する。露光装置8の露光(2nd露光)で露光ムラ(継ぎ誤差)が発生することがわかっている場合、マスクレスの露光装置1による1st露光の段階で、敢えて露光ムラを発生させて露光する。ただし、マスク露光装置8の2nd露光で発生する露光ムラを予測した状態で1st露光の露光パターンの投影像の位置を補正とする。例えば、2nd露光を露光装置8で行う際、図10(A)のように、投影領域85Aが規定の位置からY方向にΔYdだけずれて、継ぎ部85Cにおけるパターン中心位置はY方向にずれることとなるので、1st露光をマスクレスの露光装置1で行う際に、継ぎ部85Cと重なることとなる領域のパターン中心位置をY方向にずらせばよい。つまり、露光装置8による2nd露光によって、トータルで露光ムラとして生じる重ね誤差や位置誤差が解消されるようにする。マスクレスの露光装置1は、1st露光を開始する前に、2nd露光が露光装置8で露光されるという情報、さらにその露光装置8で露光した場合の継ぎ部の位置情報、継ぎ部での露光ムラ予想の情報(予測の継ぎ誤差の情報)を受信する。マスクレスの露光装置1は、そのような一連の情報を受信する受信部を備えている。マスクレスの露光装置1は、その受信部で得られた情報に基づいて、例えば、空間光変調器75を制御するデータを作成及び/または露光モジュール7を制御し、露光ムラ(継ぎ誤差に対応した露光像の位置ずれ)を敢えて発生させる。
さらに、第1実施例のように、1st露光が露光装置8による露光であることに限定されることはなく。1st露光が露光装置1によるものであってもよい。また、上述したように、1st露光はマスクレスの露光装置1で行い、2nd露光は露光装置8で行ってもよい。
図14は、変形例1に係るマスクを用いて露光する露光装置8の一例を示す正面図である。露光装置8は、図14に示すように、Y方向に延びた円弧状の投影領域SFを有するミラープロジェクション型の走査露光装置としても良い。その場合、基板10上の露光領域R1の左半分の部分が、走査軌跡SL1に沿って投影領域SFで走査露光されるように基板10を移動させる。その後、基板10をY方向にステップ移動させてから、再び、露光領域R1の右半分の部分が走査軌跡SL2に沿って投影領域SFで走査露光されるように基板10を移動させる。
図15は、変形例2に係るマスクを用いて露光する露光装置8におけるアライメントマークの位置関係を示す説明図である。図12でも説明したように、露光装置8には、複数のアライメント系が設けられる。例えば、図15のように、基板10の走査移動の方向(X方向)と直交したY方向に複数のアライメント系AL1、AL2、・・・AL5が配置される。また、基板10上にはディスプレイ等の矩形状の露光領域R1が配置され、その周囲には複数のアライメント用のマークM1、M2、・・・M8が配置される。露光領域R1の+X方向端部付近と、-X方向の端部付近との各々には、例えば、Y方向に所定間隔で配置される8つのマークM1~M8が配置される。
そこで、基板10上に既に露光領域R1(下地パターン)とマークM1~M8とが形成されていて、その露光領域R1上に露光装置8で重ね合わせ露光する場合は、事前に図7に示したステージ80で基板10をXY方向に移動させて、複数のアライメント系AL1、AL2、・・・AL5によって複数のマークM1~M8の各位置を計測して、アライメントが行われる。
図7のマスクを用いて露光する露光装置8では、投影光学系84による台形状の複数の投影領域が、走査方向(X方向)と直交したY方向に関して継ぎ合わされて露光するものであるが、走査方向に関して継ぎ露光を行うような使い方もできる。その場合、例えば基板10上のX方向の約半分までの領域内に第1マスクパターンを第1走査露光で転写した後、残りの約半分の領域内に第2マスクパターンを第2走査露光で転写する。その際、基板10上に転写される第1マスクパターンと第2マスクパターンとはX方向に継ぎ合わされる。
[付記1]
第1投影光学系を介して基板上に第1パターンを露光することと、
前記第1パターンが露光された前記基板上(前記第1パターンに基づいて回路パターンが形成された前記基板上)に第2投影光学系を介して第2パターンを露光することと、
を含み、
前記第1投影光学系による前記基板上の第1投影領域の大きさと前記第2投影光学系による前記基板上の第2投影領域の大きさとを異ならせるデバイス製造方法。
[付記2]
前記第1パターン及び前記第2パターンの一方は、マスクを介した光により露光され、
前記第1パターン及び前記第2パターンの他方は、空間光変調器を介した光により露光される、付記1に記載のデバイス製造方法。
[付記3]
前記第1投影光学系及び前記第2投影光学系の一方を介して前記基板と前記マスクとを互いに光学的に共役な関係に配置することと、
前記第1投影光学系及び前記第2投影光学系の他方を介して前記基板と前記空間光変調器とを光学的に共役な関係に配置することと、
を含む付記2に記載のデバイス製造方法。
[付記4]
第1投影光学系を介して基板上に第1パターンを露光することと、
前記第1パターンが露光された前記基板上(前記第1パターンに基づいて回路パターンが形成された前記基板上)に第2投影光学系を介して第2パターンを露光することと、
を含み、
前記第1パターン及び前記第2パターンの一方は、マスクを介した光により露光され、
前記第1パターン及び前記第2パターンの他方は、空間光変調器を介した光により露光される、デバイス製造方法。
Claims (20)
- 第1露光部分の一部と第2露光部分の一部とが継ぎ合わされた第1露光パターンが露光された基板を走査方向に移動させながら、第2露光パターンを前記第1露光パターンに重ねて露光する露光装置であって、
前記第2露光パターンを分割して露光する複数の露光モジュールを備え、
前記複数の露光モジュールは、複数の素子を有すると共に前記第2露光パターンに応じて前記複数の素子が制御される空間光変調器と、前記空間光変調器を照明する照明光学系と、前記第2露光パターンに応じて制御された前記空間光変調器の像を前記基板へ投影する投影光学系と、を有し、
前記複数の露光モジュールの少なくとも一つは、前記第1露光部分の一部と前記第2露光部分の一部とが継ぎ合わされた継ぎ部を露光する、露光装置。 - 前記継ぎ部を露光する前記露光モジュールの露光幅は、前記継ぎ部の露光幅よりも小さい、請求項1に記載の露光装置。
- 前記継ぎ部を露光する前記露光モジュールは、前記継ぎ部の露光幅よりも露光幅が小さくなるように、前記空間光変調器の大きさと前記投影光学系の投影倍率を設定している、請求項2に記載の露光装置。
- 前記複数の露光モジュールは、前記走査方向と直交する非走査方向において、前記第1露光パターン上で複数の前記継ぎ部が形成された第1の間隔よりも小さい第2の間隔で複数配置されている、請求項1~3のいずれか一項に記載の露光装置。
- 前記複数の露光モジュールによって前記基板を露光する前に、前記継ぎ部の位置を計測する計測系と、
前記計測系の計測結果に基づいて、前記複数の露光モジュールによる前記第2露光パターンの露光位置を制御する制御部と、を備える、請求項1~4のいずれか一項に記載の露光装置。 - 前記第2露光パターンに応じて前記複数の素子を制御する制御データを生成するデータ生成部を備え、
前記制御部は、前記計測系の計測結果に基づいて、前記投影光学系、前記空間光変調器、および前記データ生成部の少なくとも1つを制御し、前記複数の露光モジュールによる前記第2露光パターンの露光位置を制御する、請求項5に記載の露光装置。 - 前記制御部は、前記計測系の計測結果に基づいて、前記データ生成部の制御データを補正する、請求項6に記載の露光装置。
- 前記制御部は、前記計測系の計測結果に基づいて、前記投影光学系による前記第2露光パターンの投影位置、回転、投影倍率の少なくとも1つを補正する、請求項6または7に記載の露光装置。
- 前記計測系は、前記第1露光パターンと共に前記基板に形成されたアライメントマークを計測するアライメント計測系を含む、請求項5~8のいずれか一項に記載の露光装置。
- 第1露光パターンが露光された基板を走査方向に移動させながら、第2露光パターンを前記第1露光パターンに重ねて露光する露光装置であって、
前記第2露光パターンを分割して露光する複数の露光モジュールと、
前記第1露光パターンのうち露光状態が他領域の露光状態と異なる所定領域を検出する検出部と、
前記検出部の検出結果に基づいて、前記露光モジュールを調整する調整部と、を備え、 前記複数の露光モジュールは、複数の素子を有すると共に前記第2露光パターンに応じて前記複数の素子が制御される空間光変調器と、前記空間光変調器を照明する照明光学系と、前記第2露光パターンに応じて制御された前記空間光変調器の像を前記基板へ投影する投影光学系と、を有し、
前記調整部により調整された前記複数の露光モジュールの少なくとも一つは、前記所定領域上を露光する、露光装置。 - 基板を走査方向に移動させながら第1露光パターンを露光する露光装置であって、
複数の素子を有すると共に前記第1露光パターンに応じて前記複数の素子が制御される空間光変調器と、前記空間光変調器を照明する照明光学系と、前記第1露光パターンに応じて制御された前記空間光変調器の像を前記基板へ投影する投影光学系と、を有する露光モジュールと、
前記第1露光パターンが露光された基板に対して、前記第1露光パターンに重ねて第2露光パターンを露光する別の露光装置に関する情報を、前記第1露光パターンを前記基板上に露光する前に、受信する受信部と、
前記受信部により受信した前記情報に基づいて、前記露光モジュールを調整する調整部と、を備える、露光装置。 - 前記受信部は、前記露光装置により第1露光部分の一部と第2露光部分の一部とが継ぎ合わされて露光される前記基板上の位置に関する前記情報を受信し、
前記調整部は、前記情報に基づいて、前記露光モジュールを調整する、請求項11に記載の露光装置。 - 請求項1~12のいずれか一項に記載の露光装置を用いて前記基板を露光することと、 露光された前記基板を現像することと、を含むデバイス製造方法。
- 請求項1~12のいずれか一項に記載の露光装置を用いてフラットパネルディスプレイ用の基板を露光することと、
露光された前記基板を現像することと、を含むフラットパネルディスプレイの製造方法。 - マスク上の固定パターンを基板に投影露光する第1露光装置と、空間光変調器による可変パターンを前記基板に投影露光する第2露光装置とを使って、前記基板上に電子デバイスの異なるレイヤーのパターンを重ね合わせ露光するデバイス製造方法であって、
前記第1露光装置の第1の投影領域の大きさが前記基板上に形成すべき前記電子デバイスの大きさよりも小さいとき、前記基板の移動によって前記第1の投影領域内に現れる前記固定パターンの投影像を継ぎ露光して、前記電子デバイスの第1のレイヤーを形成する第1工程と、
前記第2露光装置は、前記第1の投影領域の大きさよりも小さい第2の投影領域内に前記可変パターンを投影する複数の露光モジュールを有し、前記複数の露光モジュールの各々から前記基板上に投影される前記可変パターンの投影像を継ぎ露光して、前記電子デバイスの第2のレイヤーを形成する第2工程と、を含み、
前記第1工程の後に前記第2工程を行う場合は、前記第2工程では、前記第1工程で発生した継ぎ誤差に基づいて前記複数の露光モジュールの各々からの前記可変パターンの投影像の位置を補正し、
前記第2工程の後に前記第1工程を行う場合は、前記第2工程では、前記第1工程で発生し得る予測の継ぎ誤差に基づいて前記複数の露光モジュールの各々からの前記可変パターンの投影像の位置を補正するデバイス製造方法。 - 第1の露光装置を用いて第1層を形成し、
前記第1の露光装置の投影領域とは大きさが異なる投影領域の第2の露光装置を用いて、前記第1層に重なる第2層を形成する、
露光方法。 - 第1投影光学系を介して基板上に第1パターンを露光することと、
前記第1パターンが露光された前記基板上に第2投影光学系を介して第2パターンを露光することと、
を含み、
前記第1投影光学系による前記基板上の第1投影領域の大きさと前記第2投影光学系による前記基板上の第2投影領域の大きさとを異ならせるデバイス製造方法。 - 前記第1パターン及び前記第2パターンの一方は、マスクを介した光により露光され、
前記第1パターン及び前記第2パターンの他方は、空間光変調器を介した光により露光される、請求項17に記載のデバイス製造方法。 - 前記第1投影光学系及び前記第2投影光学系の一方を介して前記基板と前記マスクとを互いに光学的に共役な関係に配置することと、
前記第1投影光学系及び前記第2投影光学系の他方を介して前記基板と前記空間光変調器とを光学的に共役な関係に配置することと、
を含む請求項18に記載のデバイス製造方法。 - 第1投影光学系を介して基板上に第1パターンを露光することと、
前記第1パターンが露光された前記基板上に第2投影光学系を介して第2パターンを露光することと、
を含み、
前記第1パターン及び前記第2パターンの一方は、マスクを介した光により露光され、
前記第1パターン及び前記第2パターンの他方は、空間光変調器を介した光により露光される、デバイス製造方法。
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JP2005266779A (ja) * | 2004-02-18 | 2005-09-29 | Fuji Photo Film Co Ltd | 露光装置及び方法 |
JP2018060001A (ja) * | 2016-10-04 | 2018-04-12 | 東京エレクトロン株式会社 | 補助露光装置及び露光量分布取得方法 |
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JP2018060001A (ja) * | 2016-10-04 | 2018-04-12 | 東京エレクトロン株式会社 | 補助露光装置及び露光量分布取得方法 |
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