WO2013145682A1 - パターニング用レーザ加工装置 - Google Patents
パターニング用レーザ加工装置 Download PDFInfo
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- WO2013145682A1 WO2013145682A1 PCT/JP2013/001991 JP2013001991W WO2013145682A1 WO 2013145682 A1 WO2013145682 A1 WO 2013145682A1 JP 2013001991 W JP2013001991 W JP 2013001991W WO 2013145682 A1 WO2013145682 A1 WO 2013145682A1
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- Prior art keywords
- workpiece
- laser
- laser processing
- beam head
- speed
- Prior art date
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- 238000000059 patterning Methods 0.000 title claims description 23
- 239000010409 thin film Substances 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims description 17
- 230000003287 optical effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000003754 machining Methods 0.000 description 20
- 238000004519 manufacturing process Methods 0.000 description 17
- 239000000758 substrate Substances 0.000 description 13
- 239000011521 glass Substances 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000005068 transpiration Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
- B23K26/359—Working by laser beam, e.g. welding, cutting or boring for surface treatment by providing a line or line pattern, e.g. a dotted break initiation line
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/083—Devices involving movement of the workpiece in at least one axial direction
- B23K26/0838—Devices involving movement of the workpiece in at least one axial direction by using an endless conveyor belt
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/08—Devices involving relative movement between laser beam and workpiece
- B23K26/0869—Devices involving movement of the laser head in at least one axial direction
- B23K26/0892—Controlling the laser beam travel length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/362—Laser etching
- B23K26/364—Laser etching for making a groove or trench, e.g. for scribing a break initiation groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/0445—PV modules or arrays of single PV cells including thin film solar cells, e.g. single thin film a-Si, CIS or CdTe solar cells
- H01L31/046—PV modules composed of a plurality of thin film solar cells deposited on the same substrate
- H01L31/0463—PV modules composed of a plurality of thin film solar cells deposited on the same substrate characterised by special patterning methods to connect the PV cells in a module, e.g. laser cutting of the conductive or active layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/16—Composite materials, e.g. fibre reinforced
- B23K2103/166—Multilayered materials
- B23K2103/172—Multilayered materials wherein at least one of the layers is non-metallic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/50—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26
- B23K2103/56—Inorganic material, e.g. metals, not provided for in B23K2103/02 – B23K2103/26 semiconducting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Definitions
- the present invention relates to a laser processing apparatus used for patterning in a manufacturing process of a thin film solar cell or a flexible solar cell.
- thin film solar cells for photovoltaic power generation
- This thin film solar cell forms a thin film layer (for example, about several hundred nm to several tens of ⁇ m) by depositing a semiconductor such as a metal film or a silicon film (“deposition” or “film formation”) on one surface of a glass substrate.
- a semiconductor such as a metal film or a silicon film
- film formation a semiconductor
- the thin film layer is subjected to patterning.
- the thin film solar cell substrate hereinafter, also simply referred to as “work” will be described as an example.
- a transparent electrode layer (thin film layer) 111 is formed on the upper surface of the glass substrate 110 (FIG. 8A) (FIG. 8B).
- a transparent electrode layer 111 is partially removed, and a linear processing line 112A is patterned (FIG. 8C).
- a photoelectric conversion layer (thin film layer) 113 is formed on the upper surface of the transparent electrode layer 111 (FIG. 8D).
- the processing line 112B is patterned by irradiating the laser beam 115 (FIG. 8E). Thereafter, a back electrode layer (thin film layer) 114 is formed on the upper surface of the photoelectric conversion layer 113 on the substrate 110 on which the processing line 112B is formed on the photoelectric conversion layer 113 (FIG. 8F). Then, the back surface electrode layer 114 is irradiated with a laser beam 115 from a laser processing apparatus to pattern the processing line 112C (FIG. 8G).
- the substrate 110 patterned in this way becomes a modularized solar cell.
- a laser beam 102 (hereinafter also simply referred to as “beam”) from a laser oscillator 101 is split into a plurality of beams by a beam spectrometer 103, and these beams are separated.
- the direction is changed toward the work 106 by the light guide mirror 104.
- the beam condensing lens 105 irradiates the focal length of the beam 102 with the thin film layer 107 of the workpiece 106 to peel off the thin film layer 107 to form a processing line 108.
- the work 106 is fixed to the table of the work feeding apparatus 109, the work 106 is sent in the X direction, and the laser beam 102 is irradiated to the work 106 to form a processing line 108. To do. Thereafter, the workpiece 106 is fed in the Y direction by a predetermined amount (for the machining line pitch), and then the workpiece 106 is fed in the X direction in the direction opposite to the above feeding, and the workpiece 106 is irradiated with the laser beam 102 to be machined. 108 is formed. Then, by repeating this operation, a processing line 108 is sequentially formed on the workpiece 106. That is, the work 106 is intermittently repeated for the work 106 to be sent in the X direction to form the machining line 108 and for the work 106 to be sent in the Y direction.
- a laser beam emitted from a laser oscillator is dispersed with a mirror, and the processing line is formed by irradiating the thin film layer of the solar cell with the laser beam through a condenser lens.
- a condenser lens there is something like this (for example, see Patent Document 1).
- a cylindrical lens generates a laser beam having a thin cross-section in cross section, and the thin laser beam is overlapped in a partially overlapped state to form a fine line-shaped processing trace.
- the laser beam 102 from the laser oscillator 101 is processed with a plurality of beams 102 that are split and distributed, the quality of each beam is likely to vary, and the processing quality is not stable. If an attempt is made to mount a plurality of laser oscillators 101 so that a plurality of stable beams can be used, a large space is required and the laser processing apparatus 100 becomes expensive.
- Patent Document 1 has the same problem.
- an object of the present invention is to provide a patterning laser processing apparatus capable of forming a processing line on a thin film layer of a work with high efficiency while feeding the work at a predetermined speed.
- the present invention provides a patterning laser processing apparatus for forming a processing line with a laser beam on a thin film layer formed on a work, wherein the work is sent in one direction at a predetermined feed speed. From the irradiation start side to the irradiation end side in a direction crossing the feed direction of the workpiece while feeding the workpiece at a predetermined speed with the fast feed device and the constant speed feed device or detecting the feed speed of the workpiece A beam head unit having a plurality of beam heads that scan a thin film layer of a workpiece with a laser beam, a laser oscillator that irradiates the beam head with a laser beam, and a scanning speed of the laser beam that is irradiated from the beam head And a control device for controlling a processing line formed on the workpiece to be fed at a predetermined speed by relatively controlling the workpiece feeding speed, Serial control device is configured to machine simultaneously or alternately the processing line by switching the beam head for machining the machining line.
- the laser beam head unit scans the thin film layer of the workpiece while supporting and feeding the workpiece at an accurate position, and a processing line is formed in a direction intersecting the workpiece feeding direction. Since it can be formed, the processing line can be processed with high efficiency into the thin film layer of the workpiece.
- the laser beam is irradiated almost continuously and efficiently to form a processing line, thus further reducing the tact time in the solar cell production process and improving production efficiency. You can plan.
- a method of detecting the speed of the workpiece, performing feedback control, and adjusting the scanning timing of the laser beam it is possible to cope with a continuously flowing workpiece such as a roll-to-roll manufacturing method.
- a switch for switching which of the plurality of beam heads is irradiated with the laser beam irradiated from the laser oscillator wherein the beam head unit has at least one beam head irradiated from the irradiation start side.
- a reciprocating motion type in which at least one beam head returns to the irradiation start side while moving toward the laser beam and performing laser processing, and the control device switches the switch to perform laser processing.
- the head may be configured to irradiate a laser beam.
- the other beam head is returned to the irradiation start side during the laser processing operation by one beam head, the time during which laser processing is interrupted can be greatly reduced, and the processing time can be shortened.
- a circuit breaker configured to block the laser beam irradiated from the laser oscillator from being applied to the beam head, wherein the beam head unit has at least one beam head directed from the irradiation start side to the irradiation end side.
- the controller is configured to return at least one beam head to the irradiation start side during laser processing while moving, and the control device controls the circuit breaker to perform laser processing on the beam head that performs laser processing. You may be comprised so that a beam may be irradiated.
- the other beam head is returned to the irradiation start side during the laser processing operation by one beam head, the time during which laser processing is interrupted can be greatly reduced, and the processing time can be shortened.
- the beam head unit may have a circulation mechanism for circulating the plurality of beam heads in a horizontal direction or a vertical direction.
- the beam head is circulated in the horizontal direction or the vertical direction according to the use conditions and the like, while performing laser processing from the irradiation start side to the irradiation end side with one beam head, Since the beam head is returned from the irradiation end side toward the irradiation start side, laser processing can be performed almost continuously, and efficient laser processing with reduced tact time of laser processing can be performed.
- the beam head unit may be provided with a mechanism for constant optical path length of laser beams to be irradiated to the plurality of beam heads.
- the intensity of the laser beam irradiated onto the workpiece from the beam head moved from the irradiation start side to the irradiation end side can be made constant.
- control device may be configured to determine a scanning position in the feed direction with respect to the workpiece from the arrangement of the plurality of beam heads, one beam head for laser processing, and the workpiece feed speed. .
- a machining line that intersects the workpiece feeding direction with a single laser beam can be machined substantially continuously and efficiently. Can be greatly speeded up.
- FIG. 1 is a perspective view schematically showing a laser processing apparatus according to the present invention.
- FIG. 2 is a plan view schematically showing a processing line by the laser processing apparatus shown in FIG.
- FIG. 3 is a plan view showing the configuration of the laser processing apparatus according to the first embodiment of the present invention.
- FIG. 4 is a side view of the laser processing apparatus shown in FIG.
- FIG. 5 is a schematic view of an optical path length constant device provided in the laser processing apparatus shown in FIG.
- FIG. 6 is a perspective view showing a configuration of a laser processing apparatus according to the second embodiment of the present invention.
- FIG. 7 is a perspective view showing a configuration of a laser processing apparatus according to the third embodiment of the present invention.
- FIG. 1 is a perspective view schematically showing a laser processing apparatus according to the present invention.
- FIG. 2 is a plan view schematically showing a processing line by the laser processing apparatus shown in FIG.
- FIG. 3 is a plan view showing the configuration of the laser processing apparatus according to the first
- FIG. 8A is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell by the laser processing apparatus.
- FIG. 8B is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8A.
- FIG. 8C is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8B.
- FIG. 8D is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8C.
- FIG. 8E is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8D.
- FIG. 8F is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8E.
- FIG. 8G is a side cross-sectional view showing the manufacturing procedure of the thin-film solar cell following FIG. 8F.
- FIG. 9 is a perspective view schematically showing a conventional laser processing apparatus.
- the laser processing apparatus 1 of this embodiment includes a camera 2 that detects a processing reference position (such as an end face) of a workpiece 5 and a feed direction (Y direction, hereinafter “Y”) of the position-detected workpiece 5.
- a constant-speed feeding device 3 that accurately feeds the The constant speed feeding device 3 of this embodiment is a work chuck carriage system that grips the work 5 with the work chuck 4 and feeds it on the roller 9 of the work support mechanism 8.
- This constant-speed feeding device 3 includes a work shaft 4 having a rotation axis ( ⁇ axis) in a planar direction and, if necessary, a driving axis of an X axis (a direction intersecting with the feeding direction) and a Y axis (a direction parallel to the feeding direction). Is provided so as to be synchronized with the feed of the constant speed feeding device 3 and can be processed while correcting in a direction to suppress the twist generated in the workpiece 5.
- the constant speed feeding device 3 may have other configurations such as a conveyor system and a driving roller conveyor system.
- work 5 sent with the constant speed feeder 3 is sent in the state which supported the glass substrate 7 from the downward direction in the state which made the thin film layer 6 the upper surface.
- the work support mechanism 8 in addition to the roller 9, for example, a free bearing, a non-contact air adsorbing unit (such as an attracting mechanism for attracting the work 5 by air from below) or the like is used.
- a beam head unit 20 that performs patterning processing on the workpiece 5 to be fed is provided at a predetermined position in the feeding direction of the workpiece 5 fed by the constant speed feeding device 3.
- the beam head unit 20 is arranged so as to scan the laser beam 70 in a scanning direction (X direction, hereinafter referred to as “X”) that intersects the feed direction Y of the workpiece 5.
- X direction a scanning direction
- the left side shown is the irradiation start side S, and the right side is the irradiation end side E.
- the beam head unit 20 is disposed at a predetermined position, and the laser beam 70 is accurately emitted from the beam head unit 20.
- a processing line (scribe line) 11 can be formed with high accuracy on the workpiece 5 that is accurately fed by the constant speed feeding device 3.
- the feeding of the workpiece 5 and the irradiation of the laser beam 70 by the constant speed feeding device 3 are controlled by the control device 60.
- the beam head unit 20 includes a plurality of beam heads (FIGS. 3, 4, 6, and 7) 22, 23 that perform patterning by bending the laser beam 70 emitted from the laser oscillator 21 and irradiating the workpiece 5 with the laser beam 70. Is provided.
- the laser beam 70 irradiated from the beam head unit 20 toward the workpiece 5 is irradiated with one laser beam 70 irradiated from the laser oscillator 21 toward the workpiece 5. Details of the beam head unit 20 will be described later.
- the processing unit 10 provided with the beam head unit 20 is provided with a workpiece position holding mechanism (not shown) that supports and feeds the workpiece 5 fed by the constant speed feeding device 3 to an accurate position (level). .
- a workpiece position holding mechanism for example, an air blow that presses the workpiece 5 from above without contact, a workpiece pressing mechanism that presses the workpiece 5 with a pressing roller, or the like is employed.
- the workpiece pressing mechanism and the roller 9 of the workpiece support mechanism 8 the workpiece 5 is fed at an accurate position in the beam head unit 20.
- These workpiece pressing mechanisms and workpiece support mechanisms 8 can employ known techniques.
- the vertical position (level) of the workpiece 5 sent in the feeding direction Y in the processing unit 10 can be changed. If it does not fluctuate, the focal point of the laser beam 70 that processes the processing line 11 while feeding the workpiece 5 can be prevented from being shifted.
- a suction duct (not shown) for sucking the thin film or transpiration removed during the formation of the processing line 11 is provided above the workpiece 5, the removed thin film or transpiration is re-applied to the thin film layer 6 or the like. It can be prevented from sticking.
- the laser scanning position is fixed. Then, the laser beam 70 is scanned in the scanning direction X from the irradiation start side S to the irradiation end side E at regular intervals, and patterning is performed on the workpiece 5 sent at a predetermined speed by the laser beam 70. ing.
- the feeding speed of the workpiece 5 and the scanning speed of the laser beam 70 are relatively set so that the processing line 11 by the combined speed of the laser beam scanning direction X and the workpiece feeding direction Y is perpendicular to the feeding direction Y. It is controlled by the control device 60.
- the feed speed of the work 5 is “feed speed VY”
- the scanning direction seen from the ground is “ground scanning direction XG”
- the scanning speed with respect to the ground is “ground scanning speed VXG”
- the scanning direction is “relative scanning direction XW”
- the scanning speed in the width direction of the workpiece 5 is “relative scanning speed VXW”
- the relative scanning speed VXW VXG ⁇ cos ⁇ .
- the workpiece 5 is parallel to the relative scanning direction XW.
- the processing line 11 can be continuously formed at a predetermined interval LY.
- the relative control of the workpiece feed speed VY and the laser beam scanning speed VXG is performed by the control device 60 (FIG. 1).
- the patterning processing is completed by feeding the workpiece 5 once in the feeding direction Y. Also, since the patterning process is completed by sending the workpiece 5 once in one direction, patterning is performed not only on the workpiece 5 of a predetermined length but also on a continuous workpiece such as a roll-to-roll system. Processing becomes possible.
- the processing line 11 can be processed at a higher speed by using a flat beam (including a line beam) as the laser beam 70.
- a flat beam including a line beam
- the direction of the flat beam is controlled so that the processing line 11 is perpendicular to the workpiece feed direction Y, and is irradiated.
- This laser processing apparatus 30 is an example of a reciprocating operation type in which a plurality of beam heads 22 and 23 are reciprocated between an irradiation start side S and an irradiation end side E.
- two beam heads 22 and 23 are provided, and the first beam head 22 and the second beam head 23 are reciprocally moved in opposite directions.
- a rail 31 extending in the scanning direction X intersecting the feeding direction Y of the workpiece 5 is provided above the workpiece 5 conveyed by the constant speed feeding device 3.
- the first beam head 22 and the second beam head 23 are provided on both sides of the rail 31 so as to reciprocate between the irradiation start side S and the irradiation end side E, respectively.
- the beam heads 22 and 23 are guided by a linear guide (not shown) provided along the rail 31, and the irradiation start side S and the irradiation end side E are driven by a drive motor or the like.
- a constant speed drive mechanism or the like that reciprocates between the two can be employed.
- Other configurations may be used as the configuration for reciprocating the beam heads 22 and 23.
- the laser oscillator 21 is provided on the irradiation start side S of the rail 31.
- the laser oscillator 21 is arranged so as to irradiate a laser beam 70 in parallel with the moving direction of the beam heads 22 and 23.
- the laser beam 70 emitted from the laser oscillator 21 is bent in the orthogonal direction by the first bend mirror 24.
- the bent laser beam 70 is bent in the orthogonal direction by the second bend mirror 25 or 26 and applied to the beam heads 22 and 23.
- two bend mirrors 24A and 24B are arranged in the vertical direction.
- One bend mirror 24 ⁇ / b> A is arranged so that the laser beam 70 is accurately bent toward one second bend mirror 25.
- the other bend mirror 24B is arranged so that the laser beam 70 is bent accurately toward the other second bend mirror 26.
- the bend mirrors 24A and 24B are integrally moved in the vertical direction and can be switched.
- a configuration for example, a fluid pressure cylinder or the like that integrally moves these bend mirrors 24A and 24B up and down is a switch 29.
- the switching of the first bend mirror 24 is controlled by the control device 60 (FIG. 1).
- two bend mirrors 24A and 24B are provided and switched.
- the angle of one bend mirror 24 is controlled so that the laser beam 70 is accurately applied to each of the second bend mirrors 25 and 26. You may make it bend toward.
- a third bend mirror 27 that bends the laser beam 70 irradiated in the horizontal direction downward and the laser beam 70 bent by the third bend mirror 27 are condensed on the beam heads 22 and 23.
- a condensing lens 28 is provided.
- the laser beam 70 bent by the first bend mirror 24 ⁇ / b> A is transmitted from the first beam head 22 by the second bend mirror 25.
- the first beam head 22 is irradiated with the beam bent in the scanning direction.
- the laser beam 70 irradiated on the first beam head 22 is bent toward the work 5 by the third bend mirror 27 provided on the first beam head 22, and is irradiated toward the work 5 from the condenser lens 28.
- the A machining line 11 is formed on the workpiece 5 by the laser beam 70.
- the first bend mirror 24 is switched from the bend mirror 24A to the bend mirror 24B by the switch 29. Then, the laser beam 70 is bent toward the second bend mirror 26.
- the laser beam 70 applied to the second bend mirror 26 is applied to the second beam head 23 from the second bend mirror 26.
- the laser beam 70 applied to the second beam head 23 is bent toward the work 5 by a third bend mirror 27 provided on the second beam head 23 in the same manner as the first beam head 22 and is condensed. Irradiation from the lens 28 toward the workpiece 5.
- a machining line 11 is formed on the workpiece 5 by the laser beam 70.
- the rail 31 is provided as shown by a two-dot chain line in FIG.
- a third beam head 22B (a fourth beam head (not shown) if necessary) may be provided on the rail 31B in parallel with the workpiece feed direction Y.
- the second bend mirror 25 in the direction in which the rail 31B is newly provided can be moved in the vertical direction, and when the laser beam is processed by the third beam head 22B, the second bend mirror 25 is lowered to allow the laser beam 70 to pass through.
- the second bend mirror 25B provided may be bent toward the third beam head 22B.
- FIG. 5 illustrates the first beam head 22 side as an example.
- a laser beam 70 bent by the second bend mirror 25 (26) is provided in the fourth and fifth bend mirrors 41 provided in front of the beam head 22 (23) in the moving direction. , 42 is applied to the beam head 22 (23) through a reflecting mirror unit 43.
- the fourth and fifth bend mirrors 41 and 42 of the constant optical path length device 40 are provided so as to reflect the laser beam 70 from the second bend mirror 25 (26) in the opposite direction by 180 °.
- This constant optical path length device 40 is configured to move the reflecting mirror unit 43 by a distance that is half the amount of movement of the beam head 22 (23).
- the reflection mirror unit 43 is moved in the same direction by half the amount of movement of the beam head 22 (23), thereby maintaining the optical path length of the laser beam 70 constant. 22 (23) can be irradiated.
- This optical path length constant device 40 is an example, and the optical path length of the laser beam 70 may be constant with another configuration using a link, a fiber, or the like.
- the laser processing apparatus 1 of the first embodiment when one of the beam heads 22 (23) performs laser processing by the beam head unit 20 including the plurality of beam heads 22 and 23.
- the other beam head 23 (22) can be moved to the irradiation start side S. Therefore, if both beam heads 22 and 23 are moved in the opposite direction at the same speed, when one beam head 22 (23) reaches the machining end position, the other beam head 23 (22) is placed at the machining start position. can do.
- the processing line 11 of [1] shown in FIG. 3 is processed by the first beam head 22, the processing line 11 of [2] is processed by the second beam head 23, and the processing is alternately repeated to be almost continuous.
- Laser processing is possible. Therefore, for example, it is possible to efficiently perform almost continuous laser processing by moving the beam heads 22 and 23 at 10 to 20 m / sec.
- machining the machining line 11 while feeding the workpiece 5 in one direction toward the feeding direction Y can greatly reduce the tact of the machining line formation work and greatly improve the productivity of solar cells and the like. It becomes possible to make it. In addition, this makes it possible to reduce the cost of the solar cell and promote the use of the solar cell.
- FIG. 6 is a view showing a main part of the laser processing apparatus 50 according to the second embodiment.
- the laser processing apparatus 50 according to the second embodiment is an example in which a plurality of beam heads are circulated between an irradiation start side S and an irradiation end side E. In other words, this is an example in which a plurality of beam heads are operated in a return system that circulates in the same direction.
- a configuration related to the beam head unit 51 will be described, and the same configuration as the configuration shown in FIGS.
- the beam head unit 51 is disposed below the workpiece 5 will be described.
- the laser processing apparatus 50 of this embodiment is also provided with two beam heads 22 and 23. These beam heads 22 and 23 have the same configuration as the beam heads 22 and 23 shown in FIGS.
- the beam heads 22 and 23 of these embodiments are moved between the irradiation start side S and the irradiation end side E by a timing belt 53 driven by a timing pulley 52, and are swung horizontally at both ends. Circulated.
- the laser oscillator 21 is disposed on the extension line.
- the laser oscillator 21 is arranged so as to accurately irradiate the laser beam 70 toward the beam head 22 (23) moving from the irradiation start side S toward the irradiation end side E.
- a beam shutter 54 for interrupting the laser beam 70 is provided between the laser oscillator 21 and the beam heads 22 and 23 for a predetermined period during which the beam heads 22 and 23 are swung at the ends.
- an electric shutter, a mechanical shutter, or the like is used as the beam shutter 54 .
- the beam shutter 54 irradiates the beam heads 22 and 23 with the laser beam 70 irradiated from the laser transmitter 21 within a predetermined range in which the beam heads 22 and 23 circulated at a predetermined speed move in the laser beam scanning direction X. Control is performed to perform laser processing.
- the opening and closing of the beam shutter 54 is controlled based on information such as a stepping motor that drives the timing pulley 52, for example.
- the beam heads 22 and 23 are the same as those shown in FIGS. 3 and 4.
- the beam heads 22 and 23 are provided below the workpiece 5, and laser beams are directed upward from these beam heads 22 and 23.
- the beam 70 is irradiated.
- the laser beam 70 irradiated from the laser oscillator 21 is bent toward the workpiece 5 by the third bend mirror 27 of the beam head 22 (23), and is irradiated toward the workpiece 5 from the condenser lens 28.
- the other beam head 23 (22) when one of the beam heads 22 (23) performs laser processing from the irradiation start side S, the other beam head 23 (22) is irradiated from the irradiation end side E. It can be moved toward the start side S.
- FIG. 7 shows a laser processing apparatus 55 according to the third embodiment which is a modification of the laser processing apparatus 50 according to the second embodiment shown in FIG.
- the beam heads 22 and 23 are moved between the irradiation start side S and the irradiation end side E, and swung in the vertical direction at both ends to circulate.
- a laser oscillator 21 is arranged on the extension line on the side (left side in the drawing) that moves from the irradiation start side S toward the irradiation end side E.
- the laser oscillator 21 is arranged to irradiate a laser beam 70 toward the beam heads 22 and 23 that move from the irradiation start side S toward the irradiation end side E.
- a shutter 54 for interrupting the laser beam 70 is provided between the laser oscillator 21 and the beam head 22 (23) while the beam head 22 (23) is turning at the end. Yes. Since others are the same as the said 2nd Embodiment, description is abbreviate
- the other beam head 23 (22) is moved from the irradiation end side E. It can be moved toward the irradiation start side S.
- optical path length constant device for example, a link type optical path length constant device is employed, unlike the optical path length constant device 40 described above.
- the laser beam 70 is irradiated from below the workpiece 5 as in the second and third embodiments, the thin film layer 6 formed on the upper surface of the workpiece 5 through the glass substrate 7 is focused. A laser beam 70 is irradiated.
- the beam head unit 51 including the plurality of beam heads 22 and 23 is used for the irradiation start side S of one beam head 22 (23). Since the other beam head 23 (22) can be moved toward the irradiation start side S when performing laser processing from the laser beam toward the irradiation end side E, it is possible to efficiently perform substantially continuous laser processing. it can.
- machining the machining line 11 while feeding the workpiece 5 in one direction toward the feeding direction Y can greatly reduce the tact of the machining line formation work and greatly improve the productivity of solar cells and the like. It becomes possible to make it. In addition, this makes it possible to reduce the cost of the solar cell and promote the use of the solar cell.
- the work 5 is continuously fed in the feed direction Y at a constant speed (or intermittently fed at regular intervals) while intersecting the feed direction Y.
- a laser beam 70 is irradiated in the scanning direction X at a predetermined scanning speed.
- the feeding speed of the workpiece 5 and the scanning speed of the laser beam 70 are relatively compared by the control device 60 so that the processing line 11 of one laser beam 70 is perpendicular to the feeding direction Y of the workpiece 5. Therefore, the thin film layer 6 can be patterned at high speed. Then, since the laser processing is completed by sending the workpiece 5 once in the feed direction Y at a predetermined speed, the processing for one workpiece 5 can be completed in a short time.
- laser processing is completed by forming the processing line 11 by scanning the laser beam 70 while feeding the workpiece 5 in one direction. Therefore, not only processing of the workpiece 5 for each substrate but also roll-to-roll of the flexible solar cell. ⁇ High-speed continuous machining is possible even for continuous workpieces produced by the roll manufacturing method.
- a plurality of laser processing apparatuses 1 and film forming machines are provided in the feed direction even when the processing lines 11 are formed in a plurality of film forming layers. If they are arranged side by side, it is possible to continuously perform patterning while conveying the workpiece 5 in one direction, and it is possible to greatly reduce the tact of patterning and greatly improve the productivity of solar cells and the like. Become. In addition, this makes it possible to reduce the cost of the solar cell and promote the use of the solar cell.
- the laser processing apparatus 1 capable of manufacturing a solar cell with stable processing quality can be manufactured at low cost.
- the laser oscillator 21 is configured separately from the beam heads 22 and 23. However, if the laser oscillator 21 is small and light, it is configured to move integrally with the head units 22 and 23. May be.
- the laser processing apparatus according to the present invention can be used in the manufacturing process of thin film solar cells and flexible solar cells (roll-to-roll manufacturing method).
- SYMBOLS 1 Laser processing apparatus 3 Constant speed feeder 5 Workpiece 6 Thin film layer 7 Substrate (glass substrate) 11 Processing line (scribe line) DESCRIPTION OF SYMBOLS 20 Beam head unit 21 Laser oscillator 22 1st beam head 23 2nd beam head 24 1st bend mirror 24A, 24B Bend mirror 25, 26 2nd bend mirror 27 3rd bend mirror 28 Condensing lens 29 Switch 30 Laser processing apparatus 31 rail 32 beam scanning unit 40 optical path length constant device 41 fourth bend mirror 42 fifth bend mirror 43 reflecting mirror unit 50 laser processing device 51 beam head unit 54 beam shutter 55 laser processing device 60 control device 70 laser beam S irradiation start side E End of irradiation X Laser beam scanning direction Y Work feed direction
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Abstract
Description
3 定速送り装置
5 ワーク
6 薄膜層
7 基板(ガラス基板)
11 加工ライン(スクライブ線)
20 ビームヘッドユニット
21 レーザ発振器
22 第1ビームヘッド
23 第2ビームヘッド
24 第1ベンドミラー
24A,24B ベンドミラー
25,26 第2ベンドミラー
27 第3ベンドミラー
28 集光レンズ
29 切替器
30 レーザ加工装置
31 レール
32 ビーム走査ユニット
40 光路長一定装置
41 第4ベンドミラー
42 第5ベンドミラー
43 反射ミラーユニット
50 レーザ加工装置
51 ビームヘッドユニット
54 ビームシャッタ
55 レーザ加工装置
60 制御装置
70 レーザビーム
S 照射開始側
E 照射終了側
X レーザビーム走査方向
Y ワーク送り方向
Claims (6)
- ワークに形成された薄膜層にレーザビームで加工ラインを形成するパターニング用レーザ加工装置であって、
前記ワークを所定の送り速度で一方向に送る定速送り装置と、
前記定速送り装置でワークを所定速度で送りながら又はワークの送り速度を検出して送りながら、前記ワークの送り方向と交差する方向に照射開始側から照射終了側に向けて1本のレーザビームをワークの薄膜層に対して走査する複数のビームヘッドを有するビームヘッドユニットと、
前記ビームヘッドにレーザビームを照射するレーザ発振器と、
前記ビームヘッドから照射するレーザビームの走査速度と前記ワークの送り速度とを相対的に制御して所定速度で送るワークに形成する加工ラインを制御する制御装置と、を備え、
前記制御装置は、前記加工ラインを加工するビームヘッドを切替えて前記加工ラインを同時又は交互に加工するように構成されていることを特徴とするパターニング用レーザ加工装置。 - 前記レーザ発振器から照射されるレーザビームを前記複数のビームヘッドのいずれに照射するかを切替る切替器を有し、
前記ビームヘッドユニットは、少なくとも1つのビームヘッドが照射開始側から照射終了側に向けて移動してレーザ加工をしている間に少なくとも1つのビームヘッドを前記照射開始側に戻す往復動作式で構成され、
前記制御装置は、前記切替器を切替えてレーザ加工を行うビームヘッドにレーザビームを照射するように構成されている請求項1に記載のパターニング用レーザ加工装置。 - 前記レーザ発振器から照射されるレーザビームが前記ビームヘッドに照射されるのを遮断する遮断器を有し、
前記ビームヘッドユニットは、少なくとも1つのビームヘッドが照射開始側から照射終了側に向けて移動してレーザ加工をしている間に少なくとも1つのビームヘッドを前記照射開始側に戻す循環式で構成され、
前記制御装置は、前記遮断器を制御してレーザ加工を行うビームヘッドにレーザビームを照射するように構成されている請求項1に記載のパターニング用レーザ加工装置。 - 前記ビームヘッドユニットは、前記複数のビームヘッドを水平方向又は垂直方向に循環させる循環機構を有している請求項3に記載のパターニング用レーザ加工装置。
- 前記ビームヘッドユニットは、前記複数のビームヘッドに照射するレーザビームの光路長一定機構を具備している請求項2又は3に記載のパターニング用レーザ加工装置。
- 前記制御装置は、前記複数のビームヘッドの配置と、レーザ加工する1つのビームヘッドと、ワークの送り速度と、からワークに対する送り方向の走査位置を決定するように構成されている請求項5に記載のパターニング用レーザ加工装置。
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TW201410372A (zh) | 2014-03-16 |
CN104080571A (zh) | 2014-10-01 |
US9527160B2 (en) | 2016-12-27 |
KR101651214B1 (ko) | 2016-08-25 |
US20150217403A1 (en) | 2015-08-06 |
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