WO2006118133A1 - ワーク位置情報取得方法および装置 - Google Patents
ワーク位置情報取得方法および装置 Download PDFInfo
- Publication number
- WO2006118133A1 WO2006118133A1 PCT/JP2006/308704 JP2006308704W WO2006118133A1 WO 2006118133 A1 WO2006118133 A1 WO 2006118133A1 JP 2006308704 W JP2006308704 W JP 2006308704W WO 2006118133 A1 WO2006118133 A1 WO 2006118133A1
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- WO
- WIPO (PCT)
- Prior art keywords
- imaging
- workpiece
- transfer
- reference mark
- information
- Prior art date
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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
- 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
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/70—Microphotolithographic exposure; Apparatus therefor
- G03F7/70691—Handling of masks or workpieces
- G03F7/70775—Position control, e.g. interferometers or encoders for determining the stage position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67259—Position monitoring, e.g. misposition detection or presence detection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0008—Apparatus or processes for manufacturing printed circuits for aligning or positioning of tools relative to the circuit board
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0266—Marks, test patterns or identification means
- H05K1/0269—Marks, test patterns or identification means for visual or optical inspection
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/09—Shape and layout
- H05K2201/09818—Shape or layout details not covered by a single group of H05K2201/09009 - H05K2201/09809
- H05K2201/09918—Optically detected marks used for aligning tool relative to the PCB, e.g. for mounting of components
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0073—Masks not provided for in groups H05K3/02 - H05K3/46, e.g. for photomechanical production of patterned surfaces
- H05K3/0082—Masks not provided for in groups H05K3/02 - H05K3/46, e.g. for photomechanical production of patterned surfaces characterised by the exposure method of radiation-sensitive masks
Definitions
- the present invention relates to a work position information acquisition method and apparatus, and more particularly to a work position information acquisition method and apparatus for acquiring the position of a work placed on a table to be transferred relative to the table. .
- a drawing apparatus having a drawing head that emits a drawing beam equipped with a DMD (digital 'micromirror' device) is known. (See 2004-001244).
- a drawing table on which a work having a photosensitive material force is placed is moved in one direction under the drawing head, and the drawing head is placed on the work placed on the table.
- a technique in which an image pattern is exposed by irradiating a drawn drawing beam is known.
- the table reference obtained by imaging the workpiece reference mark on the workpiece placed on the table is further obtained.
- the position of the workpiece with respect to the table is determined using the position in the field of view of the imaging means of each of the mark and the workpiece reference mark, and the amount of transfer of the table until the workpiece reference mark is imaged after imaging the table reference mark. be able to.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work position information acquisition method and apparatus that can acquire the position of a work with respect to a table with higher accuracy. is there.
- the table on which the work is placed is moved relative to the image pickup means for picking up an image on the table, and the transfer is performed by the image pickup means.
- the table reference mark provided on the table and the workpiece reference mark provided on the workpiece placed on the table are imaged to obtain table imaging information and track imaging information.
- Transfer direction position information indicating the transfer direction position of the table at the time of imaging the workpiece reference mark is obtained, and the position of the workpiece with respect to the table is indicated based on the respective imaging information and each transfer direction position information.
- Imaging position fluctuation information indicating the imaging position fluctuation amount corresponding to the position of the table in the transfer direction is acquired in advance, and the table fiducial mark obtained from the imaging position fluctuation amount information is captured.
- the imaging position fluctuation amount information power obtained using the imaging position fluctuation amount corresponding to the position of the table in the transfer direction at the time of imaging the workpiece reference mark is used to obtain the workpiece position information resulting from the difference between the imaging position fluctuation amounts. It is characterized by removing the included error components
- a first workpiece position information acquisition device of the present invention includes a table on which a workpiece is placed, An image pickup means for picking up an image on the table; a transfer means for transferring the table relative to the image pickup means; and a transfer direction position for acquiring transfer direction position information indicating a transfer direction position of the table with respect to the image pickup means.
- An information acquisition means, a table reference mark provided on the relatively transferred table and a work reference mark provided on a work placed on the table are imaged by the imaging means. Based on the table imaging information and workpiece imaging information, and the table transfer direction position information of the table at the time of imaging the table reference mark and the workpiece reference mark acquired by the transfer direction position information acquisition means!
- a workpiece position comprising workpiece position information acquisition means for acquiring workpiece position information indicating the position of the workpiece relative to the table
- An information acquisition device which is an image acquisition device that indicates a position change amount of the table, which is obtained in advance and indicates a position change of the table that occurs in relative transfer of the table with respect to the image pickup unit, corresponding to a position in the transfer direction of the table.
- Work position acquisition storage means for storing position fluctuation amount information, and an imaging position fluctuation amount corresponding to a position in the transfer direction of the table at the time of imaging the table reference mark acquired from the imaging position fluctuation amount information
- a workpiece position acquisition calculation means for performing a calculation to remove the error component.
- the workpiece position obtaining calculation means may perform calculation for obtaining the error component using the imaging information at the time of imaging the table reference mark and at the time of workpiece reference mark imaging.
- the imaging position fluctuation amount information includes the imaging position fluctuation amount in the transfer direction, the imaging position fluctuation amount in the transfer orthogonal direction orthogonal to the transfer direction and parallel to the transfer plane, and the transfer orthogonal to the transfer plane.
- the amount of change in imaging position in the rotation direction around the plane orthogonal direction can be indicated.
- the first workpiece position information acquisition device includes an imaging position fluctuation amount measuring unit that measures the imaging position fluctuation amount, and the workpiece position acquisition is performed when the table is repeatedly reciprocated by the transfer unit.
- the calculation means for the operation is the test by the transfer means at least once before. It is possible to perform an operation for removing the error component using the imaging position fluctuation amount measured by the imaging position fluctuation amount measuring means during the reciprocal transfer of the table.
- the table on which the work is placed is moved relative to the image pickup means for picking up an image on the table, and the transfer is performed by the image pickup means.
- the table reference mark provided on the table and the workpiece reference mark provided on the workpiece placed on the table are imaged to obtain table imaging information and track imaging information.
- Transfer direction position information indicating the transfer direction position of the table at the time of imaging the workpiece reference mark is obtained, and the position of the workpiece with respect to the table is indicated based on the respective imaging information and each transfer direction position information.
- the imaging position variation information indicating the imaging position variation corresponding to the position of the table in the transfer direction is acquired in advance, and the information acquired from the imaging position variation information at the time of imaging the table reference mark.
- the table and the imaging means are relatively moved so as to cancel out the imaging position fluctuation amount corresponding to the moving direction position of the table at the time of imaging the table reference mark, and at the time of imaging the workpiece reference mark,
- the table and the imaging means are relatively moved so as to cancel out the imaging position fluctuation amount corresponding to the transfer direction position of the table at the time of imaging the workpiece reference mark acquired from the imaging position fluctuation amount information.
- the workpiece position information is obtained by removing the error component caused by the position fluctuation of the table.
- a second workpiece position information acquisition device of the present invention includes a table on which a workpiece is placed, an imaging unit that images the table, and the table is moved relative to the imaging unit.
- Transfer means transfer direction position information acquisition means for acquiring transfer direction position information indicating a transfer direction position of the table with respect to the imaging means, a table reference mark provided on the relatively transferred table, and the table Table imaging information and workpiece imaging information obtained by imaging the workpiece reference mark provided on the workpiece placed thereon by the imaging unit, and at the time of imaging the table reference mark acquired by the transfer direction position information acquisition unit and When the workpiece reference mark is imaged,
- a workpiece position information acquisition device comprising workpiece position information acquisition means for acquiring workpiece position information indicating the position of the workpiece with respect to the table on the basis of the movement direction position information of one table.
- the imaging position fluctuation amount information indicating the imaging position fluctuation amount indicating the position fluctuation of the table that occurs in the relative transfer of the table with respect to the imaging means and corresponding to the transfer direction position of the table is stored.
- the imaging position variation corresponding to the position in the transfer direction of the table at the time of imaging the workpiece reference mark acquired from the imaging position variation information is offset.
- a workpiece position acquisition control means for controlling the workpiece position acquisition movement means so as to move the table and the imaging means relative to each other, and the workpiece position information acquired by the workpiece position information acquisition means, The error component due to the table position fluctuation is removed.
- the work position acquisition control means may move only the imaging means.
- the work position acquisition control means may move only the table.
- the imaging position fluctuation amount information includes the imaging position fluctuation amount in the transfer direction, the imaging position fluctuation amount in the transfer orthogonal direction orthogonal to the transfer direction and parallel to the transfer plane, and the transfer orthogonal to the transfer plane.
- the amount of change in imaging position in the rotation direction around the plane orthogonal direction can be indicated.
- the second workpiece position information acquisition device includes an imaging position fluctuation amount measuring unit that measures the imaging position fluctuation amount, and the workpiece position acquisition is performed when the table is repeatedly reciprocated by the transfer unit.
- the moving means for acquiring the workpiece position can be controlled by using.
- the work position acquisition storage means may update the imaging position variation information stored in the work position acquisition storage means each time the table is reciprocated by the transfer means. I'll do it.
- the first workpiece position information acquisition device includes an imaging position fluctuation amount measuring unit that measures the imaging position fluctuation amount, and the imaging position fluctuation amount measurement is performed in the transfer of the table in the forward path by the transfer unit.
- the imaging position fluctuation amount is measured by the means, and the table reference mark and the work reference mark are imaged by the imaging means in the transfer of the table in the return path by the transfer means.
- the second workpiece position information acquisition device includes an imaging position variation measuring unit that measures the imaging position variation, and the imaging position variation measurement is performed when the table is transferred by the transfer unit on the forward path of the table.
- the imaging position fluctuation amount is measured by the means, and the table reference mark and the work reference mark are imaged by the imaging means in the transfer of the table in the return path by the transfer means.
- the imaging means captures the table reference mark provided on the transferred table and the workpiece reference mark provided on the workpiece placed on the table at different timings to obtain table imaging information. And workpiece imaging information can be obtained.
- the present inventor has found that the position variation of the transported tape caused by, for example, the influence of a temperature change in the environment becomes an error factor when determining the position of the workpiece with respect to the table. It is a thing.
- the position of the workpiece relative to the table is assumed to be such that there is no change in the position of the table during the transfer of the table from the imaging of the table reference mark on the table to the imaging of the workpiece reference mark on the workpiece.
- the fluctuations in the position of the tape that occurred during the transfer of the table from the time when the table reference mark was imaged to the time when the workpiece reference mark was imaged would be an error factor when determining the position of the work relative to the table.
- the workpiece reference mark is imaged. It has been found that the table position fluctuation up to this point causes an error in determining the workpiece position relative to the table.
- the imaging position fluctuation amount indicating the position fluctuation of the table that occurs in the relative movement of the table with respect to the imaging means is made to correspond to the position in the table transfer direction.
- Position change amount information for workpiece position acquisition shown in FIG. 6 Imaging position variation amount corresponding to the position in the direction of transfer of the table at the time of imaging the obtained table reference mark, and workpiece reference mark imaging obtained from the position variation amount information for workpiece position acquisition
- the error component included in the work position information caused by the difference between each position fluctuation amount is removed using the imaging position fluctuation amount corresponding to the position of the table in the transfer direction at the time. The position can be acquired with higher accuracy.
- the work position acquisition computing means performs a computation for obtaining an error component included in the work position information using imaging information at the time of imaging the table reference mark and the work reference mark. If this is done, the position of the workpiece relative to the table can be obtained with higher accuracy.
- the imaging position fluctuation amount indicating the position fluctuation of the table that occurs in the relative movement of the table with respect to the imaging means is made to correspond to the position in the table transfer direction.
- the table and the imaging means are relatively moved so as to cancel the amount, and the position fluctuation amount information force for workpiece position acquisition is acquired when the workpiece reference mark is captured.
- the table and the imaging means are relatively moved so as to cancel out the position variation corresponding to the direction position, and the workpiece position information is Since as allowed to to that the removal of the error component due to ⁇ movement, it is possible to obtain the position of the workpiece against the table with higher precision.
- the position fluctuation amount information for workpiece position acquisition includes the imaging position fluctuation amount in the table transfer direction, the imaging position fluctuation amount in the transfer orthogonal direction orthogonal to the transfer direction and parallel to the transfer plane, and the transfer plane. If the imaging position fluctuation amount in the rotation direction around the direction perpendicular to the transfer plane orthogonal to the direction is shown, the position of the workpiece relative to the table can be acquired more reliably.
- FIG. 1 is a diagram showing a schematic configuration of a workpiece position information acquisition apparatus according to the present invention.
- FIG. 2A1 Diagram showing the position of the table with no position fluctuation when the transfer direction position is read as pi
- FIG. 2A2 Diagram showing the position of the table with no position fluctuation when the transfer direction position is read as p2.
- FIG. 2A3 Diagram showing the position of the table with no position fluctuation when the transfer direction position is read as p3
- FIG. 2A4 Diagram showing the position of the table with no position fluctuation when the transfer direction position is read as p4
- FIG. 2A5 Diagram showing the position of the table with no position fluctuation when the transfer direction position is read as pe
- FIG. 2B1 is a diagram showing the field of view of the imaging unit when the position force in the transfer direction is read as 3 ⁇ 41 in the absence of position fluctuation
- FIG. 2B2 A diagram showing the field of view of the imaging unit when the position in the transfer direction is read as p2 with no position fluctuations
- FIG. 2B3 A diagram showing the field of view of the imaging unit when the position in the transfer direction is read as p3 without any positional fluctuation
- FIG. 2B4 A diagram showing the field of view of the imaging section when the position change occurs and the position in the transfer direction is read as p4 in the state.
- FIG. 2B5 A diagram showing the field of view of the imaging section when the position change occurs and the position in the transfer direction is read as pe in the state.
- FIG. 3A1 Diagram showing the position of the table where the position change occurred when the position in the transfer direction was read as pi
- FIG. 3A2 A diagram showing the position of the table where the position fluctuates when the transfer direction position is read as p2.
- FIG. 3A3 A diagram showing the position of the table where the position fluctuates when the transfer direction position is read as p3.
- FIG. 3A4 A diagram showing the position of the table where the position fluctuates when the transfer direction position is read as p4.
- FIG. 3A5 Diagram showing the position of the table where the position change occurred when the transfer direction position was read as pe
- ⁇ 3B3 Diagram showing the field of view of the imaging unit when the position in the transfer direction is read as p3 with position fluctuations
- FIG. 4A Diagram showing change in imaging position variation ⁇ X with respect to table transfer direction position p
- FIG. 4 ⁇ Diagram showing change in imaging position variation ⁇ y relative to table transfer direction position ⁇
- FIG. 4C Diagram showing change in imaging position variation ⁇ ⁇ relative to table transfer direction position p
- FIG.5 Diagram showing a method to correct position fluctuation in the rotation direction
- FIG. 7C is a diagram showing a change in the drawing position fluctuation amount ⁇ with respect to the table transfer direction position q.
- FIG. 8 A diagram showing a state in which each partial image pattern is drawn without correcting the position variation.
- FIG. 9A is a diagram showing a state in which the glass plate of the second drawing correction moving unit is horizontal.
- FIG. 9B is a diagram showing a state where the glass plate of the second drawing correction moving unit is tilted.
- FIG. 10 is a diagram showing a state in which each image pattern is drawn at a normal position with respect to the work on the work placed at a predetermined position force on the table.
- FIG.11 Diagram showing drawing on a workpiece using multiple drawing heads
- FIG. 1 is a diagram showing a schematic configuration when the work position information acquisition apparatus according to the embodiment of the present invention is applied to a drawing apparatus
- FIG. 2 images a reference mark by the work position information acquisition apparatus in a state where position fluctuation does not occur.
- Fig. 3 shows how the reference mark is imaged by the work position information acquisition device in a state where position fluctuation has occurred
- Fig. 4 shows the position fluctuation of the table in correspondence with the position of the table in the transfer direction.
- FIG. 5 and FIG. 5 are diagrams showing a method for correcting position fluctuations in the rotation direction.
- the work position information acquisition device 200 according to the present embodiment is different from the drawing device 100 in that they are configured to partially share each other.
- the drawing apparatus 100 includes a table 14 on which the work 12 is placed, a drawing means 30 for drawing on the work 12 placed on the table 14, and a table 14 relative to the drawing means 30.
- a transfer unit 20 that performs transfer, a linear encoder 72 that is a transfer direction position information acquisition unit that acquires transfer direction position information indicating the transfer direction position (position in the Y direction in the figure) of the table 14 with respect to the drawing means 30, and While the table 20 is transferred to the drawing means 30 by the unit 20, the drawing means 30 sequentially draws the partial image patterns corresponding to the respective positions in the transfer direction obtained by the linear encoder 72 on the work 12 placed on the table 14. Then, a drawing control unit 28 that controls to draw a predetermined image pattern on the work 12 and a drawing control unit. And an image data memory 76 storing original image data Go used for drawing an image pattern under the control of the control unit 28.
- the work 12 may be a printed wiring board, a glass substrate for display, or a substrate on which a photosensitive material is coated on a base material for producing a glass substrate for a color filter. .
- the linear encoder 72 includes a linear scale 72A arranged on the installation table 18 and a reading unit 72B arranged on a support 20B of the transfer unit 20 described later.
- a position signal indicating the position (represented by the symbol p or q in the figure) is output.
- the transfer unit 20 includes a guide 20A for guiding the table 14, a support base 20B for supporting the table 14, and a drive unit 20C for driving the support base 20B.
- a guide 20A for guiding the table 14
- a support base 20B for supporting the table 14
- a drive unit 20C for driving the support base 20B.
- the configuration of the drive mechanism is omitted, conventionally known drive mechanisms can be used.
- a slide mechanism a moving base is moved on a rail.
- a ball rail system, or an air slide system can be adopted, and the drive force transmission mechanism can be a cam mechanism, a link mechanism, a rack pinion mechanism, a ball screw, a ball bush mechanism, an air slide mechanism, or a piston.
- a cylinder mechanism can be used.
- the drive source a motor, a hydraulic actuator, a pneumatic actuator, or the like can be used.
- the drawing apparatus 100 further obtains a drawing position fluctuation amount indicating a relative position fluctuation of the table 14 with respect to the drawing means 30 generated in the transfer by the transfer unit 20 and acquired in advance in the transfer direction position of the table 14 ( p)
- the drawing position fluctuation amount storage unit 74 that stores the drawing position fluctuation amount information Hb shown in FIG. 4 and the original image data Go stored in the image data memory 76 are stored in the drawing position fluctuation amount storage unit 74.
- an image data correction unit 78 that corrects the drawing position fluctuation amount corresponding to the transfer direction position (p) indicated by the position signal acquired from the drawing position fluctuation amount information Hb so as to cancel.
- the drawing means 30 Draw a partial image pattern.
- the drawing apparatus 100 includes a first drawing correction moving unit 82 A that relatively moves the table 14 and the drawing unit 30, and a drawing beam emitted from the table 14 and the drawing unit 30.
- the table 14 and the drawing means 30 are moved relative to each other so as to cancel the drawing position fluctuation amount corresponding to the transfer direction position (P) of the table 14 when drawing the image pattern.
- a moving part 82A and a drawing correction control part 84 for controlling the second drawing correction moving part 82B are provided. Thereby, the partial image pattern can be drawn by the drawing means 30 while relatively moving the table 14 and the drawing means 30 so as to cancel the drawing position fluctuation amount.
- the transfer direction position (p) of the table 14 used in the drawing correction control unit 84 can be acquired from the linear encoder 72.
- the first drawing correction moving unit 82A is arranged on the support 20B of the transfer unit 20 to support the table 14, and the relative position between the transfer unit 20 and the support 20B. Is to move.
- the second drawing correction moving unit 82B moves the position of the drawing beam emitted from the drawing head, which is the drawing means 30.
- the drawing means may indicate only the drawing beam emitted from the drawing head, or may indicate both the drawing head and the drawing beam emitted from the drawing head. Details of the second drawing correction moving unit 82B will be described later.
- the drawing position fluctuation amount indicating the relative position fluctuation of the table 14 with respect to the drawing means 30 generated in the transfer by the transfer unit 20 is the drawing position fluctuation amount ⁇ y in the transfer direction (Y direction in the figure), and the transfer is orthogonal to the transfer direction.
- Drawing position fluctuation amount ⁇ ⁇ in the transport orthogonal direction (arrow X direction in the figure) parallel to the plane (XY plane in the figure) and around the transfer plane orthogonal direction (arrow ⁇ direction in the figure) perpendicular to the transfer plane
- the drawing position fluctuation amount ⁇ in the rotation direction (indicated by arrow 0 in the figure), and further, the drawing position fluctuation amount in the direction perpendicular to the rolling plane, pitching, and transfer plane (arrow ⁇ ⁇ direction in the figure) can be exemplified.
- the drawing position fluctuation amount that is canceled by the control by the drawing correction control section 84 of the second drawing correction moving section 82B is all or part of the above various drawing position fluctuation amounts. Can be adopted.
- drawing position fluctuation amount ⁇ can be a rotation angle around the axis perpendicular to the transfer plane passing through the center position in the table surface (the arrow ⁇ ⁇ direction in the figure).
- the positional fluctuation in the transfer direction may be caused by the fact that the position signal output from the linear encoder 72 is true due to, for example, the temperature change of the scale 72 of the linear encoder 72 or distortion due to aging. This is because the value power of is also shifted.
- the table 14 can be accurately transported per unit time. It can no longer be transported by the same distance.
- the drawing position fluctuation amount ⁇ ⁇ in the rotation direction around the axis perpendicular to the transfer plane is the component of the drawing position fluctuation amount ⁇ y in the transfer direction and the drawing position fluctuation amount ⁇ X in the transfer orthogonal direction. Since it can be distributed, the same effect as the cancellation of the three types of drawing position fluctuation amounts ⁇ x, S y, ⁇ 0, drawing position fluctuation amount ⁇ ⁇ is drawn position fluctuation amount ⁇ y and drawing position fluctuation amount ⁇ It can also be obtained by using two types of drawing position fluctuation amounts ⁇ , ⁇ y distributed to X.
- the first drawing correction moving unit 82 ⁇ can perform alignment in the x, y, and ⁇ directions.
- a lime stage (nominal model number: CMX, manufactured by THK) can be used.
- the first drawing correction movement can be performed by combining a plurality of alignment stages or a moving means using a piezo element known in the past.
- Part 82A can be configured.
- the drawing correction moving unit 82B one that employs the same components as described above can be employed.
- the workpiece position information acquisition device 200 includes a table 14 on which the workpiece 12 is placed, an imaging unit 226 that images the table 14, and a transfer unit 20 that relatively transfers the table 14 to the imaging unit 226.
- a linear encoder 72 that is a transfer direction position information acquisition unit that acquires transfer direction position information indicating the transfer direction position (p) of the table 14 with respect to the imaging unit 226, and a table 14 that is relatively transferred.
- the workpiece position information acquisition apparatus 200 uses the previously acquired imaging position fluctuation amount ⁇ indicating the positional fluctuation of the table 14 that occurs in the relative transfer of the table 14 to the imaging unit 226 as the table 14.
- the work position acquisition computing unit 234 obtains the imaging position fluctuation amount ⁇ corresponding to the transfer direction position (p) of the table 14 obtained from the linear encoder 72 at the time of imaging the table reference mark. Acquisition position fluctuation amount information obtained from Hs and imaging position fluctuation amount ⁇ corresponding to the transfer direction position (p) of the table 14 obtained from the linear encoder 72 at the time of workpiece reference mark imaging Part 234 ⁇ and each imaging position variation And an error canceling calculation unit 234B for performing a calculation to cancel the error component included in the work position information caused by the difference between the two.
- the work position information acquisition apparatus 200 is a first work position acquisition moving unit 238 A, a second work position acquisition moving unit that relatively moves the table and the imaging unit.
- the table 14 and the imaging unit 226 are moved relative to each other so as to cancel each other, and the position of the table 14 in the transfer direction at the time of workpiece reference mark imaging obtained from the imaging position variation information Hs when imaging the workpiece reference mark (p)
- the first workpiece position acquisition moving unit 238A and the second workpiece position acquisition moving unit 238B so as to relatively move the table 14 and the imaging unit 226 so as to cancel the image position fluctuation amount corresponding to Control And a workpiece position acquisition control unit 242.
- the workpiece position information Jw acquired by the workpiece position information acquisition unit 230 can be made to have the error component due to the position fluctuation of the table 14 removed.
- the workpiece position information acquisition unit 230 can obtain the corrected workpiece position information JJw and output the information.
- the corrected workpiece position information JJw is transferred to the corrected workpiece position information storage unit 244.
- the position fluctuation amount in various directions is used as the imaging position fluctuation amount indicating the relative position fluctuation of the table 14 with respect to the imaging unit 226 generated in the transfer by the transfer unit 20. Can be mentioned.
- the type of imaging position variation stored in the workpiece position acquisition storage unit 232 as imaging position variation information, the type of imaging position variation removed by the workpiece position acquisition calculation unit 234, or the first workpiece The types of imaging position fluctuations that are offset by the control of the work position acquisition control part 242 of the position acquisition moving part 238A and the second work position acquisition moving part 238B are described above as the drawing position fluctuation quantity. All or some of various position fluctuation amounts can be employed.
- the imaging position fluctuation amount ⁇ ⁇ is the direction perpendicular to the transfer plane passing through the center position in the table surface. It can be a rotation angle around a direction (arrow z direction in the figure).
- the imaging position fluctuation amount ⁇ in the rotation direction around the transfer plane orthogonal direction is divided into a component of the imaging position fluctuation amount ⁇ y in the transfer direction and an imaging position fluctuation amount ⁇ X in the transfer orthogonal direction. Therefore, the effect equivalent to the case where the position fluctuations are canceled using the three types of imaging position fluctuation amounts ⁇ x, 8 y, ⁇ 0, and the imaging position fluctuation amount ⁇ ⁇ as the imaging position fluctuation amount ⁇ y It is also possible to cancel the position fluctuation by using two kinds of imaging position fluctuation amounts ⁇ , ⁇ y distributed to the imaging position variation amount ⁇ X.
- the above-mentioned alignment stage (nominal model number: CMX, manufactured by THK) is used as the first workpiece position acquisition moving unit 238 ⁇ . ) Etc. can be adopted. Furthermore, in order to cancel out various types of imaging position fluctuation amounts, the above first stage can be achieved by combining a plurality of the alignment stages described above, or by combining a moving part using a piezo element, an air cylinder, or the like as is conventionally known.
- the moving part 238A for workpiece position acquisition can be configured.
- the second workpiece position acquisition moving unit 2308 one using the same components as described above can be used.
- first work position acquisition moving unit 238A may be the same as the first drawing correction moving unit 82A! /.
- FIGS. 2A1 to 2A5 are diagrams illustrating how the table is moved without causing a position change and each reference mark is imaged.
- FIGS. 2B1 to 2B5 are diagrams illustrating the field of view of the imaging unit at that time.
- Figure 3A1 Force Figure 3A5 is a diagram showing how the table is moved while position fluctuation occurs, and each fiducial mark is imaged without correcting the position fluctuation.
- Figures 3B1 to 3B5 show the imaging unit at that time. It is a figure which shows a visual field.
- the table imaging information and the workpiece imaging information are also simply referred to as imaging information.
- the position variation of the table 14 includes an error in the position (P) in the transfer direction read by the linear encoder 72.
- the transfer direction position read by the linear encoder 72 when the table 14 is located at the initial position is pi. When the table 14 is located at the initial position, nothing is visible in the field of view of the imaging unit 226 as shown in FIG. 2B1.
- the table 14 is transferred by the transfer unit 20 and the transfer direction position read by the linear encoder 72 is p2, the image is picked up by the image pickup unit 226.
- the table reference mark 214A which is one of the reference marks 214, is imaged to obtain imaging information S (p2) shown in FIG. 2B2.
- the image is picked up by the image pickup unit 226.
- the workpiece reference mark 212A which is one of the marks 212, is imaged to obtain imaging information S (p3) shown in FIG. 2B3.
- the workpiece reference mark is obtained by the imaging of the imaging unit 226.
- the workpiece reference mark 212C which is one of 212, is imaged to obtain imaging information S (p4) shown in FIG. 2B4.
- the table reference mark 214A is located at the reference position Q at the center of the field of view of the imaging unit 226.
- the workpiece reference mark 212A is also the reference position Q force of the imaging unit 226 in the X direction.
- the workpiece reference mark 212C has the reference position Q force of the imaging unit 226 x4 in the X direction.
- the table reference mark 214A is shifted from the reference position Q at the center of the field of view of the imaging unit 226 by ⁇ 2.
- the workpiece reference mark 212A is x3 in the X direction from the reference position Q of the imaging unit 226. Force shifted by y 3 in the Y direction.
- the workpiece reference mark 212C is x4 in the X direction from the reference position Q of the imaging unit 226. Force shifted by y4 in the Y direction.
- the positional deviations ⁇ 2, ⁇ 3, and ⁇ 4 are caused by the positional fluctuation amount of the table 14 being different at the time of each imaging in which the transfer direction positions are ⁇ 2, ⁇ 3, and ⁇ 4. is there.
- the imaging position variation information acquired in advance by measurement and stored in the workpiece acquisition storage unit 232 corresponds to the transfer direction position ( ⁇ ) of the table 14 acquired by the linear encoder 72, and this table. It shows the amount of position variation in each of the 14 X, ⁇ , and ⁇ directions. [0079] [Measurement of position variation]
- Measurement of the fluctuation amount by the drawing position fluctuation amount measuring means can be performed as follows.
- one reference scale Sk extending in the transfer direction (Y direction) is arranged on each side of the X direction on the table 14, and the imaging unit 226 is moved while the table 14 is transferred by the transfer unit 20.
- the value obtained by reading the scales of the above two reference scales in step X can be selected according to the transfer direction position (P).
- the position fluctuation amount in the direction, the position fluctuation amount in the Y direction, and the position fluctuation amount in the ⁇ direction can be acquired.
- the position variation amount can be measured by using a method using a laser side lengther.
- one corner cube is placed on each side of the X direction on the table 14, and the table 14 is transferred by the transfer unit 20, while one corner cube is used as the target of the laser side length measure.
- the transfer direction position (P) obtained by the linear encoder 72
- the value obtained by length measurement using the other corner cube as the target of the laser side extension was obtained by the linear encoder 72.
- the measurement of the position fluctuation amount can be employed for the measurement of the drawing position fluctuation amount in the drawing apparatus and the imaging position fluctuation amount in the peak position information acquisition apparatus.
- the position variation amount measuring method in the drawing apparatus is such that the table on which the workpiece is placed is transferred to the drawing means 30 and corresponds to the transfer direction position (P) acquired by the linear encoder 72.
- a plurality of test pattern images are drawn by the drawing means 30 on the workpiece.
- the position variation amount of the table is obtained in correspondence with the transfer direction position (p), thereby obtaining the transfer direction position (p).
- Position change amount in the X direction according to the position change in the Y direction The amount of movement and the amount of position fluctuation in the ⁇ direction can be acquired.
- the imaging position fluctuation amount ⁇ indicated by the imaging position fluctuation amount information obtained by the method as described above is the position in the transfer direction of the table 14 obtained by the linear encoder 72 as shown in FIGS. 4A, B, and C.
- (P) the imaging position fluctuation amount ⁇ in the X direction, the imaging position fluctuation amount ⁇ y in the ⁇ direction, and the imaging position fluctuation amount ⁇ 0 in the 0 direction are shown.
- the positional deviation ⁇ 2 is the position fluctuation amount ⁇ 2 in the table 14 force X direction, the position fluctuation amount yp2 in the ⁇ direction, and the position fluctuation amount ⁇ p2 in the ⁇ direction at the transfer direction position ⁇ 2. Recognize.
- y 2 Fp2 (xp2, yp2, ⁇ p2).
- ⁇ 3 Fp3 (xp3, yp3, 0 ⁇ 3)
- ⁇ 4 Fp4 (xp4, yp4, 0 ⁇ 4)
- the imaging information S (p2) ′, imaging information S (p3) ′, and imaging information S (including the position fluctuation of the table 14 due to the transfer of the transfer unit 20 in FIG. ⁇ 4) ' is in a state that does not include the above positional fluctuations, i.e., the imaging information S (p2), the imaging information S (p3), and the imaging information S ( After returning to the state of p4), it can be obtained by the method described above.
- the workpiece position information acquisition device 200 includes two types of methods, a data correction method and a mechanical correction method. Yes. These methods can also be applied to the acquisition of the position of the workpiece reference mark with respect to the table reference mark when the workpiece 12 is distorted and the reference mark position is deviated by a predetermined positional force on the workpiece.
- the positional deviation component ⁇ 2 that is the error component included in the workpiece position information Jw shown in FIGS. 3B2, B3, and B4. Then, after correcting ⁇ 3 and ⁇ 4 to return to the state that does not include the error components shown in FIGS. 2 ⁇ 2, ⁇ 3, and ⁇ 4, the position of the workpiece 12 relative to the table table 14 may be obtained as described above.
- FIG. 5 is a diagram illustrating a case where the imaging position variation amount in the ⁇ direction is removed.
- the position variation in the X direction and the position variation in the heel direction are not considered.
- a quadrangular body 90 ⁇ indicated by a broken line indicates an ideal position of the table 14 without position variation.
- the actual position of the table 14 is located at a position of a rectangular body 90 mm indicated by a solid line rotated by ⁇ by rotation in the ⁇ direction.
- a workpiece reference mark 91 indicated by a broken line indicates an ideal position in which the position does not change !, and the imaging unit (CCD camera) takes an image of the workpiece reference mark 91 by trusting the design position. Take a picture so that it is located in the approximate center of the field of view of part 226
- the image pickup section 226 is actually used because of a positional shift when the work is placed, a position error when the reference mark is processed on the work, or a deformation of the work.
- the position of the workpiece reference mark 91 when picked up by the image is picked up as being present at the position indicated by the mark 92 (the position is different from the ideal position).
- the correction values at the actually imaged mark positions (Xm, Ym) are the correction amounts indicated by ( ⁇ , ⁇ ′) in the figure, and the correction position of the workpiece reference mark 91 is the position indicated by the mark 94.
- the rotation of the table 14 by ⁇ can be corrected correctly.
- the workpiece position information Jw can be corrected to the one in which the error component due to the position change of the table 14 is removed.
- the corrected work position information JJw can be obtained by the work position acquisition calculation unit 234.
- the imaging position fluctuation amount ⁇ 2 obtained by the workpiece position acquisition control unit 242 from the imaging position fluctuation amount information Hs corresponding to the transfer direction positions p2, p3, and p4 of the table 14 when each reference mark is imaged.
- the workpiece position is controlled by controlling at least one of the first workpiece position acquisition moving portion 238 ⁇ and the second workpiece position acquisition moving portion 238 ⁇ ⁇ so that ⁇ 3 and ⁇ 4 are offset.
- the workpiece position information Jw acquired by the information acquisition unit 230 is made to have the error component due to the position fluctuation in the table 14 removed. In other words, the workpiece position information acquisition unit 230 can obtain the corrected workpiece position information JJw.
- the corrected workpiece position information JJw obtained by the data correction method and the machine correction method is stored in the corrected workpiece position information storage unit 244.
- the switch 248 in FIG. 1 is turned OFF and the work position obtained by the work position information obtaining unit 230 is obtained.
- Information 3 ⁇ 4Jw is not transferred to the corrected workpiece position information storage unit 244. Only the corrected workpiece position information JJw acquired by the calculation unit 234 for workpiece position acquisition is transferred and stored in the corrected workpiece position information storage unit 244. .
- the above-mentioned switching switch 248 is turned ON and the corrected workpiece position information acquired by the workpiece position information acquisition unit 230! BJJw is corrected. It is transferred to and stored in the work position information storage unit 244.
- the workpiece position information acquisition apparatus includes a reference scale Sk that is an imaging position variation measuring means for measuring the imaging position variation, and acquires the workpiece position when the table 14 is repeatedly reciprocated by the transfer unit 20.
- the calculation unit 234 uses the imaging position fluctuation amount measured using the reference scale Sk when the table 14 is reciprocally transferred by the transfer unit 20 one or more times before, and performs calculation to remove the error component. You can do it!
- the workpiece position information acquisition apparatus includes a reference scale Sk that is an imaging position variation measuring unit that measures the imaging position variation.
- a reference scale Sk that is an imaging position variation measuring unit that measures the imaging position variation.
- the workpiece position acquisition storage unit 232 updates the imaging position variation information stored in the workpiece position acquisition storage unit 232 every time the transfer unit 20 reciprocates the table 14. .
- the workpiece position information acquisition apparatus includes a reference scale Sk that is an imaging position variation measuring means for measuring the imaging position variation, and is used as a reference for the forward transfer of the table 14 by the transfer unit 20.
- the imaging position fluctuation amount may be measured using the scale Sk, and the table reference mark 214 and the work reference mark 212 may be imaged by the imaging unit 226 when the table 14 is transported in the return path.
- the imaging means 30 captures the table reference information 214 and the workpiece reference mark 212 at different timings to obtain table imaging information and workpiece imaging information.
- Fig. 6 shows the image pattern drawn when the table is transferred without causing position variation
- Fig. 7 shows the timing of drawing the image and table position variation
- Fig. 8 shows the position. It is a figure which shows the image pattern drawn without having corrected the position fluctuation
- the partial image pattern corresponding to each transfer direction position (q) acquired by the linear encoder 72 by the drawing unit 30 is displayed on the table 14.
- a predetermined image pattern is drawn on the work 12.
- the partial image patterns Bl, B2, B3, B4 drawn at the transfer direction positions ql, q2, q3, q4 of the table 14 read by the linear encoder 72 are as shown in FIG. Rendered without any misalignment in any of the X, Y, and ⁇ directions.
- the drawing apparatus 100 includes three types of methods: a data correction method, a mechanical correction method, and an optical method. ing.
- the same principle as the correction method for the position variation in the workpiece position information acquisition apparatus 200 described above is used as the method for correctly drawing each partial image pattern by correcting the position variation. be able to. Note that one of the above three methods may be used to correct the drawing position variation, or two or more methods may be combined!
- the image data correction unit 78 draws from the drawing position fluctuation amount information Hb stored in the drawing position fluctuation amount storage unit 74 corresponding to the transfer direction positions ql, q2, q3, q4 read by the linear encoder 72.
- the position fluctuation amount is acquired, and the original image data Go stored in the image data memory 76 is corrected so that the drawing position fluctuation amount is offset.
- the partial image pattern is drawn under the control of the drawing control unit 28 using the corrected image data G 1 obtained by correcting the original image data Go by the image data correction unit 78.
- each partial image pattern can be drawn in the state shown in FIG. 6 in which the positional deviations of the partial image patterns Bl, B2, B3, and B4 are corrected.
- the drawing correction control unit 84 Acquired from the drawing position variation information Hb stored in the drawing position variation storage 74 by the drawing correction control unit 84 corresponding to the transfer direction positions ql, q2, q3, q4 read by the linear encoder 72.
- the first drawing correction moving unit 82A is controlled so as to cancel out the drawing position fluctuation amount.
- the partial image pattern is drawn under the control of the drawing control unit 28 using the original image data Go.
- the drawing correction control unit 84 obtains the drawing position fluctuation amount information Hb stored in the drawing position fluctuation amount storage unit 74, and the transfer direction position ql of the table 14 at the time of drawing the partial image pattern. Tape to offset the drawing position variation corresponding to q2, q3, q4
- the first drawing correction moving unit 82A is controlled so as to move the lens 14 and the drawing means 30 relatively. As a result, each partial image pattern can be drawn in the state shown in FIG. 6 in which the positional shift of each of the partial image patterns Bl, B2, B3, and B4 is corrected.
- the drawing correction control unit 84 obtains from the drawing position fluctuation amount information Hb corresponding to the transfer direction positions ql, q2, q3, q4 read by the linear encoder 72.
- the second drawing correction moving unit 82B is controlled so as to cancel out the drawing position fluctuation amount.
- the partial image pattern is drawn under the control of the drawing control unit 28 using the original image data Go.
- the partial image pattern is drawn under the control of the drawing control unit 28 using the original image data Go.
- the second drawing correction moving unit 82B includes a transparent glass plate 85, a glass frame 86 supporting the glass plate 85, and one end of the glass frame 86 in the transfer direction as shown in FIGS. 9A and 9B.
- a pin 87 that is rotatably supported around (Y direction in the figure), and an eccentric cam 88 that moves the other end of the glass frame 86 in a direction (arrow Z direction in the figure) perpendicular to the transfer plane (XY plane);
- an electric motor 89 that pivotally rotates the eccentric cam 88.
- the drawing correction control unit 84 controls the electric motor 89 to rotate the eccentric cam 88, thereby rotating the glass frame 86 in the direction of the arrow Y in the figure, which is the drawing means 30.
- the position of the drawing beam Le from which the drawing head force is also emitted is moved in the X direction in the figure.
- the second drawing correction moving unit 82B moves the position of the drawing beam Le emitted from the drawing head force, which is the drawing means 30, in the X direction in the figure.
- the position of the drawing beam Le can also be moved in the Y direction in the figure by rotating the glass frame 86 around the arrow X direction in the figure using the same mechanism as described above.
- the drawing apparatus 100 can simultaneously correct both the positional deviation of the workpiece 12 relative to the table 14 and the positional fluctuation of the table 14 being conveyed.
- the corrected workpiece position information Jw stored in the corrected workpiece position information storage unit 244 of the workpiece position information acquisition apparatus 200 and the drawing position variation storage unit 74 of the drawing apparatus 100 are stored. Both the position of the work 12 relative to the table 14 and the position fluctuation of the table 14 can be corrected using both the drawing position fluctuation amount stored in FIG. Thus, as shown in FIG. 10, each of the partial images Bl, B2, B3, and B4 can be drawn at a predetermined correct position on the work 12 that is arranged on the table 14 so as to be shifted from the predetermined position. it can
- the image data correction unit 78 stores the drawing position fluctuation amount corresponding to the transfer direction positions ql, q2, q3, q4 read by the linear encoder 72.
- Original image data Go stored in the image data memory 76 so as to cancel the drawing position fluctuation amount acquired from the unit 74 and the corrected work position information storage unit 244 obtained from the corrected work position information storage unit 244 To correct.
- the image data correction unit 78 draws the partial image pattern under the control of the drawing control unit 28 using the corrected image data G2 obtained by correcting the original image data Go. Thereby, each partial image pattern can be drawn in the state as shown in FIG. 6 in which the positional deviations of the partial image patterns Bl, B2, B3, and B4 are corrected.
- the drawing correction control unit 84 obtains the drawing position fluctuation amount and the corrected peak position information acquired in correspondence with the transfer direction positions ql, q2, q3, q4 read by the linear encoder 72!
- the first drawing correction moving unit 82A is controlled so as to cancel out BJJW.
- the partial image pattern is drawn under the control of the drawing control unit 28 using the original image data Go.
- the drawing correction control unit 84 obtains the drawing position fluctuation amount and the acquired drawing position fluctuation amount corresponding to the transfer direction positions ql, q2, q3, and q4 read by the linear encoder 72.
- the second drawing correction moving unit 82B is controlled so as to cancel out the corrected work position g [Jw.
- the drawing control unit 28 using the original image data Go A partial image pattern is drawn under control.
- any combination of a plurality of drawing correction methods for accurately drawing the image pattern and a plurality of workpiece position acquisition methods for acquiring the workpiece position on the table may be used. ! / ⁇ , not only when one type of workpiece position acquisition method and one type of drawing correction method are combined, but also when multiple types of workpiece position acquisition methods and multiple types of drawing correction methods are combined. ,.
- the drawing apparatus 100 includes a reference scale Sk that serves both as an imaging position variation measuring unit that measures the imaging position variation and a drawing position variation measuring unit that measures the drawing position variation. Then, in the forward transfer of the table 14 by the transfer unit 20, the imaging position fluctuation amount and the drawing position fluctuation amount are shared by using the reference scale Sk, that is, by imaging the reference scale Sk by the imaging unit 226. While measuring the position fluctuation amount shown, the imaging unit 226 images the table reference mark 214 and the workpiece reference mark 212 to acquire the position of the workpiece 12 with respect to the table 14.
- the drawing apparatus 100 is configured as a so-called flat bed type, and is a flat plate that holds and holds a work 12 as a drawing target to be drawn on the surface.
- Bull 14 is equipped.
- Two guides 20A extending along the table moving direction are installed on the upper surface of the thick plate-shaped installation base 18 supported by the four legs 16.
- the table 14 is arranged so that the longitudinal direction thereof faces the table moving direction, and is supported by the guide 20A so as to be reciprocally movable.
- the drawing apparatus 100 is provided with a transfer unit 20 for driving the table 14 along the guide 20A.
- a U-shaped gate 22 is provided at the center of the installation base 18 so as to straddle the movement path of the table 14.
- Each of the end portions of the gate 22 is disposed on both side surfaces of the installation base 18.
- the drawing head that houses the drawing head constituting the drawing means 30 is accommodated.
- the image unit 24 is provided, and the other side is provided with an image pickup unit 226 that houses a plurality of CCD cameras (for example, two) that detect the front and rear ends of the workpiece 12 and pick up images of the reference marks. ing.
- the drawing unit 24 and the imaging unit 226 are respectively attached to the gate 22 and arranged above the moving path of the table 14.
- the drawing heads 30A, 30B, etc., constituting the above are installed!
- the drawing areas 32A, 32... (Hereinafter collectively referred to as the drawing area 32) by the drawing heads 30A, 30 ⁇ . It has a rectangular shape with the long side in the direction of arrow Y).
- the work 12 has a belt-like drawn area 34A, 34 ⁇ ⁇ (hereinafter collectively referred to as a drawn area 34) for each drawing head 30A, 30 ⁇ ⁇ according to the drawing operation. ) Is formed.
- each of the drawing heads 30A, 30 ⁇ ⁇ of each row arranged so that the strip-like drawn region 34 is arranged in the orthogonal direction (arrow X direction in the figure) perpendicular to the transfer direction without gap are arranged at predetermined intervals in the column direction (natural number times the long side of the drawing area). That is, for example, a portion that cannot be drawn between the drawing area 32A by the drawing head 30A and the drawing area 32B by the drawing head 30B can be the drawing area 32F by the drawing head 30F.
- the drawing means 30 arranges a number of micromirrors M, which are microscopic light modulation elements, two-dimensionally arranged from the light emitted from the light source 38 and emitted through the optical fino O.
- the drawing beam Le corresponding to each micromirror M formed according to the light modulation state of each micromirror M is spatially modulated by a DMD (digital 'micromirror' device) 36, which is a spatial light modulator.
- An image is formed on the work 12, and an image pattern, for example, a wiring pattern is drawn on the work 12.
- Each drawing means 30 includes a digital micromirror device (DMD) 36 as a spatial light modulator that spatially modulates a light beam emitted from the light source 38 and emitted through the optical fiber 40.
- DMD digital micromirror device
- the DMD 36 includes a data processing unit, a mirror drive control unit, and the like. Connected to DMD controller 29.
- the DMD controller 29 is configured to output each drawing head 30 based on the input image data.
- A, 30mm ⁇ Controls the angle of the reflection surface of each micromirror to be controlled by DMD36
- the light source 38 accommodates a plurality of sets of multiplexing modules that combine laser beams emitted from a plurality of semiconductor laser chip forces and input them to the optical fiber.
- the optical fiber extending from each multiplexing module is a multiplexing optical fiber that propagates the combined laser beam, and a plurality of optical fibers are bundled into one to form a bundled optical fiber O.
- a mirror 42 that reflects the light emitted from the bundle-like optical fiber 40 toward the DMD 36 is disposed on the light incident side of the DMD 36 of the drawing means 30. .
- the imaging optical system 59 provided on the light exit side of the DMD 36 of the drawing means 30 will be described. As shown in FIG. 1, since the imaging optical system 59 forms an image of the light source on the work 12, the side force of the DMD 36 is also directed toward the work 12 toward the work 12 in order along the optical path. , 52, micro lens array 54, and objective lens systems 56, 58 are arranged and configured.
- the lens systems 50 and 52 are configured as magnifying optical systems, and the area of the drawing area 32 on the workpiece 12 drawn by the pixel light beam reflected by the DMD 36 is enlarged to a required size. is doing.
- the microlens array 54 is formed by a plurality of microlenses 60 corresponding to each micromirror M of the DMD 36 in a one-to-one manner, and each microlens 60 is formed. 60 is arranged to pass each of the pixel light beams that have passed through the lens systems 50 and 52.
- the entire microlens array 54 is formed in a rectangular flat plate shape, and apertures 62 are individually arranged in the portions where the microlenses 60 are formed.
- the aperture 62 forms an aperture stop that is disposed in one-to-one correspondence with each microlens 60.
- the objective lens systems 56 and 58 are configured as, for example, an equal magnification optical system.
- the workpiece 12 is disposed at a position where the pixel light beam L is imaged through the objective lens systems 56 and 58.
- an image pattern can be formed by forming an image of the drawing beam Le, which is the drawing means 30 emitted from the light source 38, on the surface of the workpiece 12.
- the table 14 on which the workpiece 12 is placed moves at a constant speed from the upstream side in the transfer direction to the downstream side along the guide 20A.
- the imaging unit 226 attached to the gate 22 when the table 14 passes under the gate 22 reading of image data for a plurality of lines is started.
- each of the micro mirrors of the DMD 36 is on / off controlled for each of the drawing heads 30A, 30B.
- the laser light reflected when the micro mirror of the DMD 36 is in the ON state corresponds to each of the microlens arrays 54.
- the image is formed on the drawing surface of the workpiece 12 through a lens system including the microlens 60. In this manner, the pixel light beam L emitted from the DMD 36 is turned on / off for each micromirror, and the work 12 is drawn in approximately the same number of pixels (drawing area) as the number of pixels used in the DMD 36.
- the image pattern is formed on the workpiece 12 by irradiating the workpiece 12 with the drawing beam Le generated by the DMD 36 according to the modulation corresponding to the image pattern to be drawn.
- FIG. 13 is a block diagram showing a processing method of the position in the transfer direction of the table 14 read by the linear encoder 72.
- the 0.1 ⁇ m pitch signal output from the linear encoder 72 according to the transfer of the table 14 is divided into eight equal parts by the 8 ⁇ multiplier circuit and converted to a 0.0125 ⁇ m pitch.
- the force table that controls the DMD 36 by the DMD controller 29 causes position fluctuations in the transfer direction during the transfer of the 14, so the drawing area for drawing the image pattern is divided into 64 areas (for example, 10 mm intervals)
- the reset interval for correcting the position variation is adjusted for each area.
- the reset cycle is created using an NCO (Numerical Controlled Oscillator) circuit. As a result, the remainder of the pulses can be evenly distributed and the reset interval can be made uniform.
- the signal created by the NCO circuit is used as the DMD reset signal and input to the DMD control circuit.
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Abstract
Description
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US11/912,580 US20090035669A1 (en) | 2005-04-28 | 2006-04-26 | Work position information obtaining method and apparatus |
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JP2005133591A JP2006309021A (ja) | 2005-04-28 | 2005-04-28 | ワーク位置情報取得方法および装置 |
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JP6649316B2 (ja) * | 2017-03-31 | 2020-02-19 | 平田機工株式会社 | 移載方法および移載システム |
CN111505907B (zh) * | 2019-01-31 | 2021-06-18 | 上海微电子装备(集团)股份有限公司 | 一种工件台定位误差的校准方法 |
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- 2006-04-26 US US11/912,580 patent/US20090035669A1/en not_active Abandoned
- 2006-04-26 KR KR1020077025770A patent/KR20080005410A/ko not_active Application Discontinuation
- 2006-04-26 CN CNA2006800189002A patent/CN101185035A/zh active Pending
- 2006-04-26 WO PCT/JP2006/308704 patent/WO2006118133A1/ja active Application Filing
- 2006-04-27 TW TW095115057A patent/TW200702650A/zh unknown
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JPH11126741A (ja) * | 1997-10-23 | 1999-05-11 | Nikon Corp | 位置合わせ方法、露光方法及び露光装置 |
JP2004056080A (ja) * | 2002-05-30 | 2004-02-19 | Dainippon Screen Mfg Co Ltd | 画像記録装置 |
JP2005031274A (ja) * | 2003-07-10 | 2005-02-03 | Fuji Photo Film Co Ltd | 画像記録装置及び画像記録方法 |
JP2005316461A (ja) * | 2004-03-31 | 2005-11-10 | Fuji Photo Film Co Ltd | 露光装置の校正方法及び露光方法並びに露光装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2007046408A1 (ja) * | 2005-10-20 | 2007-04-26 | Fujifilm Corporation | 描画装置及び描画方法 |
JP2007114468A (ja) * | 2005-10-20 | 2007-05-10 | Fujifilm Corp | 描画装置及び描画方法 |
Also Published As
Publication number | Publication date |
---|---|
KR20080005410A (ko) | 2008-01-11 |
CN101185035A (zh) | 2008-05-21 |
TW200702650A (en) | 2007-01-16 |
US20090035669A1 (en) | 2009-02-05 |
JP2006309021A (ja) | 2006-11-09 |
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