WO2007141852A1 - 露光方法および露光装置 - Google Patents
露光方法および露光装置 Download PDFInfo
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- WO2007141852A1 WO2007141852A1 PCT/JP2006/311434 JP2006311434W WO2007141852A1 WO 2007141852 A1 WO2007141852 A1 WO 2007141852A1 JP 2006311434 W JP2006311434 W JP 2006311434W WO 2007141852 A1 WO2007141852 A1 WO 2007141852A1
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- Prior art keywords
- substrate
- exposure
- mask
- unit
- imaging
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Classifications
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/54—Lamp housings; Illuminating means
- G03B27/545—Lamp housings; Illuminating means for enlargers
-
- 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
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display 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
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2002—Exposure; Apparatus therefor with visible light or UV light, through an original having an opaque pattern on a transparent support, e.g. film printing, projection printing; by reflection of visible or UV light from an original such as a printed image
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
- G03F7/2022—Multi-step exposure, e.g. hybrid; backside exposure; blanket exposure, e.g. for image reversal; edge exposure, e.g. for edge bead removal; corrective 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
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70733—Handling masks and workpieces, e.g. exchange of workpiece or mask, transport of workpiece or mask
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70791—Large workpieces, e.g. glass substrates for flat panel displays or solar panels
-
- 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
- G03F9/7084—Position of mark on substrate, i.e. position in (x, y, z) of mark, e.g. buried or resist covered mark, mark on rearside, at the substrate edge, in the circuit area, latent image mark, marks in plural levels
-
- 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
- G03F9/7088—Alignment mark detection, e.g. TTR, TTL, off-axis detection, array detector, video detection
Definitions
- the present invention relates to an exposure method and an exposure apparatus used when manufacturing a color filter for a liquid crystal panel and the like.
- An exposure apparatus is known (see, for example, Patent Document 1 and Patent Document 2).
- a substrate stage on which a substrate is placed is transported to an exposure unit and positioned.
- exposure light from a light source unit is transmitted through a photomask smaller than the area of the substrate to a predetermined area on the substrate. Irradiate the area and perform the first exposure.
- the second exposure is performed on the area where the first exposure cannot be performed.
- a photomask pattern is transferred onto the entire surface of a large substrate.
- Patent Document 3 Other conventional exposure methods or exposure apparatuses are described in, for example, Patent Document 3 and Patent Document 4.
- a sheet-like base material (substrate) wound around a roll is fed to an exposure unit and positioned, and the exposure light of the light source unit force is passed through the photomask having a size corresponding to a unit substrate in this exposure unit.
- a photomask pattern is transferred by irradiating a predetermined area on the substrate.
- the sheet-like base material is transferred to the exposure unit by an amount corresponding to the unit substrate and positioned, and the same exposure operation is repeated to sequentially transfer the photomask pattern in the longitudinal direction of the sheet-like base material. To go.
- Patent Document 1 Japanese Patent Laid-Open No. 9-127702
- Patent Document 2 Japanese Patent Laid-Open No. 2000-347020
- Patent Document 3 Japanese Patent Laid-Open No. 2004-341280
- Patent Document 4 Japanese Patent Laid-Open No. 2001-264999
- the exposure light requires a large amount of energy. Therefore, there is a problem in that the exposure time of the light source unit must be extended because the irradiation time of the exposure light can be shortened.
- an alignment mark is formed in advance on the substrate (base material) and the photomask separately from the pattern. There is a problem that the manufacturing process of the substrate (base material) and the photomask becomes complicated.
- the present invention has been made in view of the above circumstances, and provides an exposure method and an exposure apparatus that can efficiently expose a substrate having a wide exposure area using a small mask. Objective.
- the present invention is characterized by the following points in order to solve the above problems.
- the exposure method according to the present invention is:
- An exposure apparatus comprises:
- a substrate transport unit for transporting the substrate in a constant direction at a constant speed
- An exposure optical system that irradiates exposure light from a continuous light source to the substrate being conveyed by the substrate conveyance unit through an opening of a mask and transfers an image of the opening onto the substrate;
- An imaging unit for imaging a pattern edge of a reference pattern formed in advance on the substrate during movement of the substrate;
- a reference position in the transport direction on the substrate and a direction perpendicular thereto is detected based on the image of the pattern edge imaged by the imaging unit, and the reference pattern imaged by the imaging unit is changed from the imaging position to the exposure position.
- control device continues to irradiate the exposure light from the continuous light source onto the substrate while the substrate moves in the exposure position from an exposure start end to an exposure end on the substrate.
- control device adjusts a position in a direction perpendicular to the mask conveyance direction based on a reference position in a direction perpendicular to the substrate conveyance direction.
- control device adjusts the position of the turning angle of the mask based on the inclination of the substrate with respect to the transport direction obtained by detecting each reference position.
- the substrate transport unit winds the sheet-shaped substrate from a storage port onto a take-up roll, and the exposure unit is moved along a plane perpendicular to the optical path of the exposure optical unit. Let's move it.
- the substrate is transferred by the substrate transfer unit.
- exposure can be performed by continuously transferring the shape of the opening of the mask. Therefore, even when a small mask is used, it is possible to efficiently perform exposure on a substrate having a wide exposure area that does not require exposure by intermittent step movement of the substrate.
- the right angle of the mask is aligned with the reference position in the direction perpendicular to the substrate conveyance direction.
- Position adjustment in the direction can be performed reliably. Therefore, it is possible to accurately perform exposure of the exposure region along the transport direction of the substrate.
- the position of the turning angle of the mask can be reliably adjusted in accordance with the inclination angle with respect to the substrate transport direction. Therefore, it is possible to perform exposure of a predetermined exposure area more accurately by accurately adjusting the position of the mask in response to a change in the position of the substrate being conveyed.
- the sheet-like substrate is wound around the retracting roll force and the exposure unit is moved along a plane perpendicular to the optical path of the exposure optical unit, it corresponds to a unit substrate. It is not necessary to repeat the exposure operation intermittently by step-moving a sheet-like substrate having a large number of exposure regions for each exposure region corresponding to each unit substrate. Therefore, a large number of substrates can be exposed very efficiently, and productivity can be increased.
- FIG. 1 is a system diagram showing an exposure apparatus according to the first embodiment of the present invention.
- FIG. 2A is a plan view for explaining mask position adjustment in the exposure apparatus according to the first embodiment of the present invention.
- FIG. 2B is a diagram illustrating a mask position adjustment in the exposure apparatus according to the first embodiment of the present invention. It is a top view for demonstrating adjustment.
- FIG. 3 is a flowchart showing the operation of the exposure apparatus according to the first embodiment of the present invention.
- FIG. 4 is a system diagram showing an exposure apparatus according to a second embodiment of the present invention.
- FIG. 5 is a system diagram showing an exposure apparatus according to a third embodiment of the present invention.
- FIG. 1, FIG. 2A and FIG. 2B an exposure apparatus according to the first embodiment of the present invention will be described with reference to FIG. 1, FIG. 2A and FIG. 2B.
- an exposure apparatus 1 includes an exposure optical system 3 installed in an exposure station (exposure unit) 2, a substrate transfer unit 5 that transfers a substrate 4 to be exposed below the exposure optical system 3, and An imaging unit 6 that images a specific part on the substrate 4, an image recognition light source 7 that illuminates the substrate 4 from below in the exposure station 2, and a control device that is connected to and controls each of the device units. 8 and.
- the exposure light from the exposure optical system 3 is irradiated onto the substrate 4 through the opening of the mask 11 provided in the exposure optical system 3, and a pattern based on the shape of the opening is transferred onto the substrate 4.
- the exposure optical system 3 includes a lamp (continuous light source) 9 composed of an ultra-high pressure mercury lamp or the like, and an illumination lens 10 that is installed below the lamp 9 and projects the exposure light from the lamp 9 downward. And a mask 11 installed below the illumination lens 10.
- the optical axis (optical path) S of the exposure optical system 3 is set in the vertical direction, and the mask 11 is positioned in a horizontal plane perpendicular to the optical axis S !.
- the lamp 9 is turned on, it continues to irradiate the exposure light until a command to turn it off is given.
- the mask 11 also has a rectangular flat plate force having a long side in the Y-axis direction (vertical direction in FIGS.
- FIG. 2A and 2B y perpendicular to the paper surface in FIG. Y-axis direction X-axis direction perpendicular to y (left-right direction in Fig. 1, Fig. 2A and 2B)
- Y-axis direction X-axis direction perpendicular to y
- X-axis direction perpendicular to y
- a plurality of are provided penetrating at predetermined intervals in the Y-axis direction y.
- the length of the opening 11a in the X-axis direction is set, for example, to be the same as the length of the pixel 18 (described later) of the substrate 4 in the X-axis direction. .
- the size of the mask 11 is sufficient if it has a necessary and sufficient area for providing the size of the openings 11a, 11a. Therefore, the mask 11 has a width force in the X-axis direction X of the substrate 4
- a unit substrate (a substrate having a size equivalent to one such as a liquid crystal panel is referred to as a “unit substrate”) in the X-axis direction X Is sufficiently small compared to (see Figures 2A and 2B).
- the mask 11 is supported on the upper surface of a mask stage 12 installed perpendicular to the optical axis S of the exposure optical system 3, and a line connecting the centers of the openings 11a and 11a is the exposure optical system.
- the mask stage 12 uses a mask driving unit 13 having a servo motor, a linear motor, and the like to determine a position in the Y-axis direction y of the mask 11 and a turning angle about an axis centering on the center of the mask 11 in a horizontal plane. It can be adjusted.
- the mask driving unit 13 detects the movement position and the turning angle of the mask stage 12 in the Y-axis direction y, and an encoder, a linear sensor, etc. for feeding back the detected values to the control device 8
- Position sensor and angle sensor are provided.
- the substrate transport unit 5 includes a storage roll 14, a take-up roll 15, and a substrate drive unit 16.
- the storage roll 14 is arranged on one end side (right side in FIG. 1) of the exposure station 2 and winds and stores a film-like (sheet-like) substrate 4.
- the take-up roll 15 is arranged on the other end side (left side in FIG. 1) of the exposure station 2 and winds up the substrate 4 fed out from the storage roll 14.
- the substrate drive unit 16 is composed of a servo motor or the like, and rotates the take-up roll 15 to continuously convey the substrate 4 along the X-axis direction X in the advancing direction (constant direction) M to the take-up roll 15. Take it up.
- the substrate drive unit 16 is provided with a position sensor such as an encoder or a linear sensor for detecting the movement position of the substrate 4 in the X-axis direction X and feeding back the detected value to the control device 8. It has been.
- the substrate transport unit 5 is provided with two pairs of guide rollers 17a and 17b, which are positioned in front of and behind the exposure station 2 (left and right in FIG. 1) and rotate while sandwiching the substrate 4 from above and below. By these guide rollers 17a and 17b, the substrate 4 moves in a horizontal state below the mask stage 12.
- the substrate 4 is, for example, a color filter substrate, and as shown in FIG. 2A, pixels (reference patterns) arranged in a matrix in a black matrix BM and having rectangular openings. 18).
- pixels reference patterns
- pixel rows for each colored layer red R, green G, blue B
- X-axis direction X transport direction
- Y-axis direction y width directions
- the reference pattern means a wiring pattern, various electrode patterns, and the like in a semiconductor component.
- the imaging unit 6 includes a half mirror 19 disposed between the illumination lens 10 and the mask 11 inside the exposure optical system 3 so as to face the image recognition illumination 7, and the half mirror 19. And a linear CCD 20 for capturing an image reflected by the first mirror 19.
- the linear CCD 20 is formed, for example, by arranging light receiving elements in a straight line in the Y-axis direction y over a length larger than the width of the substrate 4 (dimension in the Y-axis direction y).
- the position (imaging position) F of the optical axis S 1 of the half mirror 19 is the rear side of the traveling direction M of the substrate 4 from the position (exposure position) E of the optical axis S of the exposure optical system 3 (FIG. 1, 2 A and B are separated by a predetermined distance L in advance.
- the front edge (pattern edge) 18el (the front edge in the traveling direction M of the substrate 4) of the pixel 18 of the substrate 4 is imaged by the linear CCD 20 through the illumination light of the image recognition illumination 7 and is captured.
- the pixel 18 reaches the center position (exposure position) E in the X-axis direction X of the opening 1 la of the mask 11 after a predetermined time has elapsed.
- the linear CCD 20 further images a side edge (pattern edge) 18e2 in the Y-axis direction y of the pixel 18 of the substrate 4.
- the control device 8 controls the operation of the entire device and is connected to the image processing unit 21, the storage unit 22, the calculation unit 23, the lamp power supply unit 24, the substrate controller 25, and the mask stage controller 26. And a main control unit 27 that integrates and controls these operations.
- the image processing unit 21 uses the linear CCD 20 to image the front edge 18el and the side edge 18e2 of the pixel 18 of the substrate 4 and based on the image data X and Y directions X and Y of the substrate 4 The reference position in the axial direction y is detected.
- the storage unit 22 stores design data of the black matrix BM of the substrate 4, data such as data relating to the reference position, an operation program of the entire apparatus, and the like.
- the calculation unit 23 The time required for the position of the front edge 18el of the pixel 18 to move from the imaging position F to the exposure position E is calculated from the distance L between the imaging position F and the exposure position E and the transport speed of the substrate 4.
- the calculation unit 23 is configured such that the reference position (Y-axis reference position) in the Y-axis direction y of the substrate 4 based on the side edge 18e2 detected by the image processing unit 21 and the mask 11 (opening 1 la).
- the lamp power supply unit 24 reaches the exposure position E so that the force is the last pixel. Until the exposure position E reaches the exposure position E, the exposure light is continuously irradiated from the lamp 9 to the exposure position E.
- the substrate controller 25 operates the substrate driving unit 16 to convey the substrate 4 in the traveling direction M.
- the mask stage controller 26 operates the mask driving unit 13 to adjust the position of the mask stage 12 in the Y-axis direction y and adjust the turning angle of the mask stage 12 in the horizontal plane.
- the image recognition illumination 7 is turned on in response to a command from the main control unit 27.
- the substrate controller 25 drives the substrate driving unit 16 of the substrate transport unit 5 so that the substrate 4 is unwound from the storage roller 14 and taken up by the take-off roller 15 to make the exposure station 2 water. It is transported in the direction of travel M in a flat state (Step Sl).
- the linear CCD 20 receives the illumination light that has been irradiated from the lower side by the image recognition illumination 7 and passed through the pixels 18 formed on the substrate 4 through the half mirror 19, whereby the pixels 18 image data are acquired (step S2).
- Image data obtained by the linear CCD 20 is sent to the image processing unit 21 for processing.
- the image processing unit 21 includes a position of the front edge 18el of each pixel 18 aligned along the Y-axis direction y (X-axis reference position) and a side of each pixel 18 aligned along the X-axis direction X.
- the position of the side edge 18e2 (Y-axis reference position) is detected (step S3).
- the calculation unit 23 calculates the distance based on the distance L between the exposure position E and the imaging position F in the exposure station 2 and a preset conveyance speed of the substrate 4. The arrival time at the exposure position E of the pixel 18a in the front row is calculated. At the same time, the calculation unit 23 shifts the position of the opening 11a of the mask 11 in the Y-axis direction y and the Y-axis reference position (position shift of the substrate 4 in the Y-axis direction y (Y-axis position shift)). Is calculated. Further, as shown in FIG.
- the calculation unit 23 calculates the distance t between the pair of pixels 18 and 18 and the displacement amount t of the X-axis reference position of the pair of pixels 18 and 18 aligned in the Y-axis direction y. Based on the separation u, a deviation angle (inclination angle with respect to the conveyance direction of the substrate 4) ⁇ from the X and Y axes in the plane including the XY axis of the substrate 4 is calculated (step S4).
- the main control unit 27 measures the arrival time with an internal timer. When the timing is completed, the main control unit 27 masks according to the Y-axis position shift of the substrate 4 calculated by the calculation unit 23 via the mask controller 26 and the inclination angle ⁇ with respect to the transport direction of the substrate 4.
- the mask driving unit 13 is operated so as to adjust the position of the stage 12. When the mask drive unit 13 is driven, the position of the mask stage 12 in the Y-axis direction y and the turning angle in the horizontal plane (around the optical axis S of the exposure optical system 3) are adjusted, and the opening 11a of the mask 11 is adjusted.
- step S5 the main control unit 27 instructs the lamp power source unit 24 to turn on the lamp 9.
- the exposure light from the lamp 9 is converted into parallel light by the illumination lens 10 and is irradiated onto the substrate 4 through the openings 11a and 11a of the mask 11.
- exposure is performed in which the shapes of the openings 18a and 18a are transferred to predetermined positions on the substrate 4 (step S6).
- the substrate 4 is continuously conveyed at a constant speed in the traveling direction M, and the linear CCD 20 always images the front edge 18el and the side edge 18e2 of each pixel 18a.
- the X-axis reference position and the Y-axis reference position of the substrate 4 are detected, and the position of the mask 11 in the Y-axis direction y according to the Y-axis position shift of the substrate 4 and the inclination angle ⁇ in the transport direction The turning angle is adjusted. Therefore, the positions of the openings 11a and 11a of the mask 11 are adjusted, and the predetermined exposure areas 28 and 28 of the substrate 4 can be accurately exposed.
- the lamp power supply unit 24 is actuated by a command from the main control unit 27 and the lamp 9 is turned off to expose the substrate 4.
- the operation ends (step S7).
- the exposure operation for the region corresponding to one unit substrate in the film-like (sheet-like) base material 4 is completed. Subsequently, while carrying the substrate 4 in the traveling direction M, the same exposure operation as described above is performed on the adjacent exposure region, and this exposure operation is repeated, so that the substrate 4 is moved in the longitudinal direction of the substrate. It is possible to perform exposure (proxy exposure) on an area corresponding to a large number of unit substrates 4 along the line.
- the predetermined exposure regions 28, 28 have a width D commensurate with the width in the short side direction of the openings 11a, 11a of the mask 11, and are arranged with an interval P in the Y-axis direction y of the substrate 4 This is a strip-shaped area with multiple rows (2 rows in the example shown).
- the exposure regions 28 and 28 are strip-shaped regions along the X-axis direction X that surround the pixels 18 of the red R colored layer of the color filter aligned in a straight line in the X-axis direction X.
- the exposure operation for the other colored layers (green G, blue B) in the black matrix BM of the substrate 4 is performed at another similar exposure station installed individually. Further, since the color pigment is applied on the black matrix BM on the substrate 4 prior to the exposure operation, the color pigment in the area exposed by the exposure is cured. Therefore, when the substrate 4 after exposure is washed with a cleaning solution, the color pigment in the unexposed areas is removed, and the pixels 18 of the colored layers R, G, B are formed in the exposed areas 28, 28 by the cured color pigment. It is formed.
- the continuous light from the lamp 9 at the exposure station 2 is applied to the substrate 4 that is being transported in the constant direction at a constant speed by the substrate transport unit 5.
- Is irradiated through the openings 11a and 11a of the mask 11 provided on the optical axis S of the exposure optical system 3, and the images of the openings 11a and 11a are transferred onto the substrate 4.
- the front edge 18el and the side edge 18e2 of the pixel 18 formed in advance on the substrate 4 are imaged by the imaging unit 6, and the conveyance direction (X-axis direction X) on the substrate 4 and this are detected.
- X and Y reference positions in the Y-axis direction y perpendicular to are detected.
- the mask 11 When the pixel 18 imaged by the imaging unit 6 is moved to the exposure station 2, the mask 11 is placed at the reference position on the substrate 4. The position of the mask 11 is adjusted so that the positions coincide with each other, and the exposure regions 28 and 28 along the transport direction of the substrate 4 are continuously exposed.
- the exposure apparatus 1 causes the substrate 4 stored in the storage roll 14 to be wound around the take-up roll 15 by the substrate driving unit 16, thereby causing the substrate 4 to move at a constant speed.
- Exposure light as continuous light from the lamp 9 passes through the openings 11a and 11a of the mask 11 with respect to the substrate transport unit 5 transported in a certain direction at a certain degree and the substrate 4 being transported by the substrate transport unit 5 And an exposure optical system 3 that irradiates and transfers the images of the openings 11a and 11 onto the substrate 4.
- the exposure apparatus 1 includes an imaging unit 6 that images a front edge 18el and a side edge 18e2 of a pixel 18 formed in advance on the substrate 4 while the substrate 4 is moving, and a front imaged by the imaging unit 6. Based on the images of the edge 18el and the side edge 18e2, the reference position in the transport direction on the substrate 4 and the Y-axis direction y perpendicular thereto is detected, and the pixel 18 imaged by the imaging unit 6 And a control device 8 for adjusting the position of the mask 11 so that the position of the mask 11 coincides with the reference position on the substrate 4 when moved to the exposure position. The control device 8 continues the irradiation of the exposure light from the lamp 9 to the substrate 4 via the lamp light source unit 24 while the substrate 4 moves the exposure position from the exposure start end to the exposure end on the substrate 4.
- exposure is performed by continuously transferring the shape of the opening 11a of the mask 11 while transporting the substrate 4 by the substrate transport unit 5. It can be carried out. Therefore, even when a small mask is used, it is possible to efficiently perform the exposure on the substrate 4 having a wide exposure area without the need for exposure by intermittent step movement of the substrate 4.
- the position of the mask 11 can be adjusted based on the reference position by detecting the reference position of the substrate 4 using the pixels (reference pattern) 18 formed in advance on the substrate 4. Therefore, it is possible to accurately perform exposure on the predetermined exposure regions 28 and 28 of the substrate 4 and to eliminate the necessity of forming alignment marks on the substrate 4 and the mask 11 in order to adjust the position of the mask 11. Easy to manufacture.
- the control device 8 convex to the reference position in and a thereto perpendicular Y-axis direction y conveyance direction of the substrate, Te perpendicular Y axis direction y in the conveying direction of the mask 11
- the position of the mask 11 is adjusted based on the inclination ⁇ of the base plate 4 with respect to the transport direction obtained by detecting each reference position. For this reason, the position adjustment of the mask 11 in the Y-axis direction y and the turning angle of the mask 11 are adjusted in accordance with the Y-axis reference position perpendicular to the transport direction of the substrate 4 and the inclination angle ⁇ with respect to the transport direction of the substrate 4.
- the position adjustment of ⁇ can be performed reliably at the same time. Therefore, the exposure of the predetermined exposure areas 28 and 28 can be more accurately performed by adjusting the position of the mask 11 more accurately in response to the change in the position of the substrate 4 being conveyed.
- a flat unit substrate (substrate) 4a is placed on the substrate stage 30, and the substrate 4a is transported in the advancing direction M along the X-axis direction X in the exposure station 2. It is a thing. Since other configurations are the same as those of the exposure apparatus 1 according to the above-described embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted.
- the substrate stage 30 is disposed below the mask stage 12 along a horizontal plane perpendicular to the optical axis S of the exposure optical system 3.
- the substrate stage 30 reciprocates in the X-axis direction X when the substrate driving unit 16a of the substrate transport unit 5a, which is a servo motor, linear motor or the like, is driven by the command of the substrate controller 25.
- this substrate drive unit 16b detects an moved position of the substrate 4a in the X-axis direction X, and feeds back the detected value to the control device 8, a linear sensor, etc. Position sensors are provided.
- the substrate stage 30 has a frame structure so as not to block the illumination light of the image recognition illumination 7 from below, and supports the substrate 4a at the periphery thereof.
- the substrate drive unit 16a is driven by a command from the substrate controller 25. Then, the substrate stage 30 moves in the direction M. While the substrate 4a on the substrate stage 30 is transported in the traveling direction M through the exposure station 2, the exposure optical system 3 continuously provides a predetermined exposure region 28 from the front end (exposure start end) in the traveling direction M. , 28, and the exposure is stopped at the rear end (end of exposure) in the traveling direction M. When the exposure of one substrate 4a is completed, the substrate stage 30 returns to the original position, places a new substrate 4a, and starts the next exposure operation. This operation is repeated to perform the exposure operation.
- the position adjustment of the mask 11 according to the Y-axis position shift in the Y-axis direction y of the substrate 4a and the inclination angle ⁇ with respect to the transport direction is the exposure apparatus 1 of the first embodiment. This is done in the same way as in
- the exposure operation can be continuously performed while the substrate 4 a is being transported, similarly to the exposure apparatus 1 according to the above-described embodiment. Therefore, it is possible to efficiently perform exposure (proxy exposure) on the predetermined exposure regions 28 and 28 of the unit substrate 4a, and to reliably perform the exposure method according to the first embodiment.
- an exposure apparatus 1B according to a third embodiment of the present invention will be described with reference to FIG.
- the illumination lens 10 of the exposure optical system 3 in the exposure apparatus 1A according to the second embodiment is replaced with a projection lens 10a
- the projection lens 10a is replaced with a substrate stage 30 ( It is arranged in the vicinity of the substrate 4a).
- the mask stage 12 is arranged between the projection lens 10a and the lamp 9.
- the half mirror 19b is disposed between the projection lens 10a and the mask stage 12. Since other configurations are the same as those of the exposure apparatus 1A according to the above-described embodiment, the same components are denoted by the same reference numerals, and description thereof is omitted.
- this exposure apparatus 1B during the exposure operation, exposure light that is continuous light from the lamp 9 passes through the opening 11a of the mask 11 and is irradiated onto the substrate 4a by the projection lens 10a. Then, the shape of the opening 11a is transferred onto the substrate 4a. Accordingly, when the substrate 4a is transported in the traveling direction M by the substrate stage 30 in the same manner as in the case of the exposure apparatus 1A, the exposure optical system 3b continuously performs a predetermined exposure region on the substrate 4a. 28 and 28 are exposed (projection exposure).
- V Even during this exposure operation, V, even if the substrate 4a is displaced in the Y-axis direction y in the Y-axis direction and the tilt angle relative to the transport direction
- the position adjustment of the mask 11 according to ⁇ is performed in the same manner as in the exposure apparatus 1.
- the position adjustment is performed by moving the projection lens 1 Oa by attaching a driving unit similar to the mask driving unit 13 to the projection lens 10a instead of moving the mask stage 12. Say it with a word.
- the exposure operation can be continuously performed while transporting the substrate 4a in the same manner as the exposure apparatuses 1 and 1A according to the embodiment.
- the exposure regions 28 and 28 can be efficiently exposed, and the exposure method according to the embodiment of the present invention can be reliably performed.
- the lamp power supply unit 24 is operated in response to a command from the main control unit 27, whereby the exposure start end of the substrate 4a
- the lamp 9 was turned on to perform exposure, and at the end of exposure, the lamp 9 was turned off to complete the exposure.
- a shutter may be provided below the lamp 9, and the shutter may be opened and closed while the lamp 9 is lit to start and end exposure at the exposure start end and exposure end.
- a colored layer R, G, B
- An example applied to is shown.
- the present invention is not limited to this, and can also be applied to the production of transparent thin film electrodes for liquid crystal panels, the production of other semiconductor elements, and the production of photomasks and reticles.
- the exposure method and exposure apparatus of the present invention can be used when manufacturing a color filter for a liquid crystal panel, a transparent thin film electrode, a semiconductor element, and the like. Since this exposure method and exposure apparatus can perform exposure by continuously transferring the shape of the opening of the mask while the substrate is transferred by the substrate transfer unit, even if a small mask is used, Since it is not necessary to perform exposure by intermittent step movement of the substrate, it is possible to efficiently perform exposure on the substrate having the exposure area.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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KR1020087030144A KR101136444B1 (ko) | 2006-06-07 | 2006-06-07 | 노광 방법 및 노광 장치 |
PCT/JP2006/311434 WO2007141852A1 (ja) | 2006-06-07 | 2006-06-07 | 露光方法および露光装置 |
US12/301,984 US8451426B2 (en) | 2006-06-07 | 2006-06-07 | Exposure method and exposure apparatus |
CN200680054845.2A CN101460897B (zh) | 2006-06-07 | 2006-06-07 | 曝光方法以及曝光装置 |
Applications Claiming Priority (1)
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PCT/JP2006/311434 WO2007141852A1 (ja) | 2006-06-07 | 2006-06-07 | 露光方法および露光装置 |
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PCT/JP2006/311434 WO2007141852A1 (ja) | 2006-06-07 | 2006-06-07 | 露光方法および露光装置 |
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US (1) | US8451426B2 (ja) |
KR (1) | KR101136444B1 (ja) |
CN (1) | CN101460897B (ja) |
WO (1) | WO2007141852A1 (ja) |
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Also Published As
Publication number | Publication date |
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US8451426B2 (en) | 2013-05-28 |
US20100128239A1 (en) | 2010-05-27 |
CN101460897A (zh) | 2009-06-17 |
KR20090017585A (ko) | 2009-02-18 |
KR101136444B1 (ko) | 2012-04-19 |
CN101460897B (zh) | 2013-03-27 |
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