WO2009081621A1 - レーザ加工装置およびレーザ加工方法 - Google Patents
レーザ加工装置およびレーザ加工方法 Download PDFInfo
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- WO2009081621A1 WO2009081621A1 PCT/JP2008/065514 JP2008065514W WO2009081621A1 WO 2009081621 A1 WO2009081621 A1 WO 2009081621A1 JP 2008065514 W JP2008065514 W JP 2008065514W WO 2009081621 A1 WO2009081621 A1 WO 2009081621A1
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- substrate
- laser
- processing
- laser beam
- processing mode
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/09—Severing cooled glass by thermal shock
- C03B33/091—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam
- C03B33/093—Severing cooled glass by thermal shock using at least one focussed radiation beam, e.g. laser beam using two or more focussed radiation beams
-
- 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
- B23K26/082—Scanning systems, i.e. devices involving movement of the laser beam relative to the laser head
-
- 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
- B23K26/10—Devices involving relative movement between laser beam and workpiece using a fixed support, i.e. involving moving the laser beam
-
- 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
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/03—Glass cutting tables; Apparatus for transporting or handling sheet glass during the cutting or breaking operations
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/033—Apparatus for opening score lines in glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B33/00—Severing cooled glass
- C03B33/02—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor
- C03B33/023—Cutting or splitting sheet glass or ribbons; Apparatus or machines therefor the sheet or ribbon being in a horizontal position
- C03B33/037—Controlling or regulating
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2249/00—Aspects relating to conveying systems for the manufacture of fragile sheets
- B65G2249/04—Arrangements of vacuum systems or suction cups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2249/00—Aspects relating to conveying systems for the manufacture of fragile sheets
- B65G2249/04—Arrangements of vacuum systems or suction cups
- B65G2249/045—Details of suction cups suction cups
Definitions
- the present invention relates to a laser processing apparatus that heats a brittle material substrate at a temperature lower than the temperature at which the substrate is softened by irradiating the laser beam, and performs a cutting process by relatively moving the laser beam.
- the brittle material substrate to be processed according to the present invention include a glass substrate, ceramics of a sintered material, single crystal silicon, a semiconductor wafer, a ceramic substrate, and the like.
- a substrate placed on a table is scanned with a laser beam to perform scribe processing (also referred to as laser scribe), and then a laser is applied along a scribe line formed on the substrate.
- scribe processing also referred to as laser scribe
- a laser processing method for performing a break processing also called a laser break
- the scribe process refers to a process of forming a shallow crack (referred to as a scribe line) that becomes a cutting line at the time of division on a planned line to be divided before completely dividing the substrate.
- the breaking process refers to a process in which a crack is developed in the depth direction by laser irradiation or the like along a formed scribe line and is completely divided.
- Patent Document a processing method in which a laser beam is scanned along a pre-formed scribe line in a state where gas is blown and floated from below the substrate toward the lower surface of the substrate.
- a high-quality divided section can be obtained by performing a cutting method in which a scribing process is performed by the first laser irradiation and then a breaking process is performed by the second laser irradiation.
- a cutting method in which a scribing process is performed by the first laser irradiation and then a breaking process is performed by the second laser irradiation.
- the substrate when the substrate is placed on a table as a support means by performing a break process by laser irradiation in a state where the substrate is levitated, In comparison, the substrate can be easily divided. In particular, if the substrate is thick, it is difficult to break by simply placing the substrate on a table and irradiating with a laser. Usually, the substrate is divided by applying a bending moment by mechanical pressing using a break bar. However, when the substrate is levitated, it is possible to divide by laser irradiation alone.
- the substrate having a plate thickness of 0.5 mm or less it may be suddenly divided during the scribing process by laser irradiation, which may cause a problem. That is, in some cases, it is necessary to control the substrate state for each processing step so that it is not divided at the time of scribe processing by laser irradiation and is divided only at the time of break processing by the next laser irradiation.
- the x-direction and y-direction for the purpose of cutting the substrate into a square
- the x-direction scribing process is performed first, followed by the orthogonal y-direction.
- the present invention accurately controls the division state of the substrate for each processing step so that the substrate is not divided at the time of scribe processing by laser irradiation and is surely divided at the break processing by laser irradiation of the next process.
- An object of the present invention is to provide a laser processing apparatus capable of performing the above.
- the laser processing apparatus of the present invention which has been made to solve the above problems, performs a scribing process on the processed surface of a substrate made of a brittle material by a first laser beam scan, and then performs two scribing along the formed scribe line.
- a laser processing apparatus for performing a break processing by a second laser beam scanning wherein a substrate mounting surface is formed of a porous member, and an adsorption mechanism that adsorbs the substrate through the porous member and gas is supplied to the substrate through the porous member.
- the laser beam scanning optical system that scans the substrate, and the detachment of the substrate is prevented by operating the suction mechanism during scribe processing to restrain the deformation of the substrate. And so that during the break processing and a control unit for controlling so as to facilitate the cutting of the substrate by letting freely rise to deformation of the substrate by operating the floating mechanism.
- the porous member may be a hard sponge material, a porous material such as ceramic, a metal plate in which a hole is formed, or the like.
- the substrate is placed on the porous member serving as the substrate placement surface of the table.
- the controller operates the suction mechanism during the scribing process to suck the substrate.
- the substrate is strongly adsorbed so that the substrate is not deformed such that a bending moment is applied to the substrate.
- a substrate having a small thickness compared to a substrate having a large thickness is likely to bend when heated by a laser beam.
- a thin substrate (usually a substrate having a thickness of up to 0.1 mm) among the substrates to be processed. Is a thin substrate) and is adsorbed with an adsorption force that does not cause bending. Then, in a state where the substrate is strongly adsorbed on the substrate mounting surface, a laser beam is scanned by a laser beam scanning optical system to form a scribe line (crack). In this way, the scribe line is formed so that the substrate is never divided during the scribe process. Subsequently, gas is blown to the lower surface of the substrate by the levitation mechanism to float the substrate. At this time, the contact member restricts the substrate from moving horizontally.
- the laser beam is scanned along the scribe line in a state where the substrate is levitated and divided.
- a substrate with a large thickness compared to a substrate with a small thickness is difficult to divide by simply irradiating it with a laser beam while adsorbed to a table. Irradiate the beam. Thereby, even a thick substrate can be easily divided.
- the substrate is not divided at the time of scribe processing (laser scribe), and is reliably divided at the next break processing (laser break).
- the divided state of the substrate can be accurately controlled for each processing step.
- a laser processing apparatus made to solve the above-described problem performs a scribing process by scanning a laser beam for the first time on a processing surface of a substrate made of a brittle material, and then along the formed scribe line.
- a laser processing apparatus that performs a breaking process by scanning the laser beam for the second time, wherein a substrate mounting surface is formed of a porous member, and an adsorption mechanism that adsorbs the substrate through the porous member and the substrate through the porous member Executed at the time of machining at least thick plates, a table provided with a levitation mechanism that blows gas to rise, a laser light source, a laser beam scanning optical system that scans a laser beam emitted from the laser light source on the substrate, and A processing mode selection unit that can select a thick plate processing mode and a thin plate processing mode to be executed when performing thin plate processing, and a thick plate processing mode are selected. When the thin plate processing mode is selected, the suction mechanism is operated during scribing to control the substrate. And a control unit for each processing mode for controlling to prevent the substrate from being divided by restraining the deformation.
- the control unit for each processing mode when the thick plate processing mode is selected by the processing mode selection unit, the control unit for each processing mode operates the levitation mechanism during break processing so that the brittle material substrate can be freely deformed. Control is performed so that the substrate is divided. Thereby, even if it is a board
- the control unit for each processing mode controls so that the substrate can be prevented from being divided by operating the suction mechanism during scribe processing to restrain the deformation of the substrate. To do.
- substrate can be prevented at the time of a scribe process.
- the thickness of the substrate it is possible to easily divide at the time of break processing for a thick substrate, and to prevent division at the time of scribe processing for a thin substrate, and execute control according to the thickness. Can do.
- control unit for each processing mode operates the suction mechanism with a lower suction force than the thin plate processing mode when scribing in the thick plate processing mode to position the substrate, and the levitation mechanism during break processing in the thin plate processing mode. It is also possible to control to promote the division of the substrate by causing the substrate to be freely deformed. According to this, in the thick plate processing mode, positioning is performed with the suction force necessary for normal position fixing during the scribe processing. In the thin plate processing mode, the levitation mechanism is operated to cause the substrate to be freely deformed to promote the division of the substrate. According to the present invention, reliable cutting can be performed according to the thickness of the substrate.
- the suction when the suction mechanism is operated during the scribing process to restrain the deformation of the substrate, the suction may be performed with a force of 30 MPa or more. According to this, since the adsorption mechanism is operated with such a strong force at the time of scribe processing, it is possible to reliably suppress the deformation of the substrate at the time of heating.
- the upper limit of the suction force is not particularly shown, but suction is performed with a force within a range where the substrate is not damaged.
- the laser processing method of the present invention made from another viewpoint performs scribing by scanning the laser beam for the first time on the processing surface of the brittle material substrate, and then performing the second laser along the formed scribe line. It is a laser processing method that performs a break processing by scanning a beam, and at the time of scribe processing, a substrate is adsorbed to the substrate mounting surface to restrain deformation of the substrate, thereby forming a scribe line while preventing the substrate from being divided, At the time of break processing, the substrate is lifted at the same horizontal position as that at the time of scribe processing, so that the substrate is freely deformed to facilitate the division of the substrate.
- the laser processing method made from another viewpoint is that the processing surface of the substrate made of a brittle material is scribed by the first laser beam scanning, and then the second laser beam is formed along the formed scribe line.
- a laser processing method for performing a breaking process by scanning the substrate and when the thickness of the substrate is at least 0.5 mm or less, the substrate is attracted to the substrate mounting surface during the scribing process to restrain the deformation of the substrate.
- the substrate is lifted from the substrate mounting surface so that the substrate is freely deformed to facilitate the division of the substrate. I have to.
- the plate thickness of the substrate made of a brittle material is at least 0.5 mm or less, the substrate is surely prevented from being divided by being adsorbed on the substrate mounting surface and restraining the deformation of the substrate.
- the plate thickness is at least 2 mm or more, since the substrate is lifted from the substrate mounting surface at the time of break processing and the substrate is deformed freely to promote the division of the substrate, the thickness of the thin plate substrate is also increased. Even a plate substrate can be divided while accurately controlling the substrate state so that the substrate state becomes a desired state. For 0.5 mm to 2 mm, it is preferable to perform both suction during scribe processing and levitation during break processing so as to be surely divided after the break processing.
- FIG. 1 is an overall configuration diagram of a laser processing apparatus LM1 that is an embodiment of the present invention.
- the perspective view which shows the structure of a long axis direction switching part.
- the figure which shows the structure when a long axis direction switching part is a 1st state, and the direction which an elliptical laser advances.
- the figure which shows the direction when a long axis direction switching part is a 2nd state, and the direction which an elliptical laser advances.
- the figure which shows the control system of the laser processing apparatus of FIG. The flowchart when performing general machining mode. The flowchart when performing thick plate processing mode or thin plate processing mode.
- FIG. 1 is an overall configuration diagram of a laser processing apparatus LM1 according to an embodiment of the present invention.
- the laser processing apparatus LM1 mainly includes a laser light source 10, a laser scanning optical system 20, a table 40, a substrate guiding mechanism 50, and a trigger mechanism 60.
- a CO 2 laser is used for the laser light source 10.
- a CO laser or excimer laser may be used instead of the CO 2 laser.
- a laser beam (original beam L0) having a circular cross section is emitted from the laser light source 10.
- the laser scanning optical system 20 can be broadly divided into a beam shaping unit 21 that adjusts the cross-sectional shape of the laser beam, a beam cross-sectional enlargement unit 24 that expands and emits the beam diameter of the laser beam, and guides the laser beam to the substrate.
- a scanning mechanism unit 22 that scans the beam spot BS by a laser optical system that forms the laser spot BS thereon and a moving mechanism that moves the laser optical system along the table surface (XY direction), a beam shaping unit 21, and a beam cross-section enlargement
- An optical path adjusting unit 23 that guides the laser beam emitted from any one of the units 24 to the scanning mechanism unit 22, and a beam cross-section switching that switches the optical path of the laser beam (original beam) between the beam shaping unit 21 and the beam cross-section expanding unit 24.
- Mechanism 29 Of the table surfaces, the X direction is the scanning axis direction (the scribing direction), and the Y direction is the feed axis direction.
- the beam shaping unit 21 shapes the original beam emitted from the laser light source 10 into a parallel beam having an elliptical cross-sectional shape and a plurality of optical elements for adjusting the major axis diameter and minor axis diameter of the parallel beam. Consists of.
- FIG. 2A is a diagram illustrating a configuration example of the beam shaping unit 21 that emits an elliptical parallel beam.
- the beam shaping unit 21 includes a first parabolic mirror (concave surface) M1, a second parabolic mirror (convex surface) M2, a third parabolic mirror M3 (convex surface), and a fourth parabolic mirror M4 (concave surface). 4 optical elements.
- the first parabolic mirror (concave) M1 and the second parabolic mirror (convex) M2 by matching the focal point of each other, are arranged so that the confocal F 12.
- the third parabolic mirror (convex) M3 and the focal point of each other match also the fourth parabolic mirror (concave) M4, are arranged so that the confocal F 34.
- the traveling direction of the laser beam from the first parabolic mirror (concave surface) M1 to the second parabolic mirror (convex surface) M2 is the XY plane direction, and the laser beam reflected by the second parabolic mirror M2 is the first one.
- the four parabolic mirrors M3 are directed so that the traveling direction of the laser beam from the third parabolic mirror (convex surface) M3 toward the fourth parabolic mirror (concave surface) M4 is the XZ plane.
- An object mirror is arranged in three dimensions.
- the first parabolic mirror M1 reflects the original beam L0 (see FIG. 2B) having a circular cross section traveling in the X direction in the XY plane direction.
- the beam width in the Z direction remains the same, and the beam width in the Y direction travels while converging, and enters the second parabolic mirror M2.
- the second parabolic mirror M2 by are arranged so that the confocal F 12, when reflecting the laser beam focused in the Y direction, becomes again parallel beam L1 (see FIG. 2 (c)) , Proceeds toward the X direction.
- the beam width in the Z direction of the parallel beam L1 remains the original beam L0, and becomes a laser beam having an elliptical cross section in which the beam width in the Y direction is reduced.
- the beam width in the Y direction remains unchanged, and the beam width travels in the XZ plane while expanding the beam width in the X direction. It enters the fourth parabolic mirror M4.
- Fourth parabolic mirror M4 by are arranged so that the confocal F 34, when reflecting the laser beam to expand in the X direction, is again collimated beam L2 (see FIG. 2 (d)) , Proceeds toward the X direction.
- the beam width in the Z direction of the parallel beam L2 is larger than that of the original beam L0, and the beam width in the Y direction is a laser beam having a long major axis elliptical cross-section reduced in comparison with the original beam.
- the parallel beam L2 having an elliptical cross-sectional shape shaped by the beam shaping unit 21 forms an elliptical beam spot BS on the substrate G via the optical path adjustment unit 23 and the scanning mechanism 22 in the subsequent stage. . Therefore, by adjusting the optical constants of these four parabolic mirrors M1 to M4, it is possible to form a desired elliptical beam spot in which the major axis and the minor axis are independently adjusted.
- the beam section enlarging unit 24 includes a combination lens 28 that expands the beam diameter of the original beam L0 from the laser light source and emits it as a parallel beam.
- an expanded parallel light beam can be obtained by combining a concave lens and a convex lens.
- the cross-sectional area of the expanded beam cross section is adjusted to be larger than the elliptical beam formed by the beam shaping unit 21. This is because, in general, when a laser break is performed after laser scribing, it is easier to break if heating is performed in a wide range. However, you may make it perform a break process with the same beam spot shape as the time of a scribe process. In that case, it is not necessary to provide the beam cross-section enlarged portion 24.
- the beam cross-section switching mechanism 29 includes two reflecting mirrors M21 and M22, and can enter and exit the optical path of the laser beam by a driving mechanism (not shown).
- a driving mechanism not shown
- the two reflecting mirrors M21 and M22 are placed on the optical path, the optical path of the laser beam toward the beam shaping unit 21 is switched toward the beam cross-section expanding unit 24, and the circular shape of the parallel light beam expanded by the combination lens 28 is obtained.
- the beam travels to the optical path adjustment unit 23. Therefore, depending on whether the optical path of the laser beam is directed to the beam shaping unit 21 or the beam cross-section expanding unit 24, either the elliptical beam or the expanded circular beam is incident on the optical path adjustment unit 23. It is like that.
- the optical path adjustment unit 23 includes a long-axis direction switching unit 30 and a plane mirror M6, and is provided between the beam shaping unit 21 and the scanning mechanism unit 22.
- the optical path adjustment unit 23 performs optical path adjustment for guiding an elliptical beam (enlarged circular beam) to the scanning mechanism unit 22 and performs adjustment to change the major axis direction of the laser beam.
- FIG. 3 is a perspective view showing a configuration of the long axis direction switching unit 30.
- FIG. 4 is a diagram showing the configuration when the major axis direction switching unit 30 is in the first state and the direction in which the laser beam travels (FIG. 4A is a plan view, and FIG. 4B is A in FIG. 4A). Sight).
- FIG. 5 is a diagram showing the configuration when the major axis direction switching unit 30 is in the second state and the direction in which the laser beam travels (FIG. 5 (a) is a plan view, and FIG. 5 (b) is FIG. 5 (a)). A view in FIG.
- the long-axis direction switching unit 30 includes a plane mirror group (M11 to M16).
- the plane mirror M11 is a movable mirror that is rotated 90 degrees by a support shaft 31b that is rotated by a motor 31a, and is used as the optical path switching mechanism 31.
- the plane mirror M16 is moved in the Y-axis direction by the slide mechanism 32.
- the plane mirror M11 and the plane mirror M16 are interlocked so that the first position indicated by the solid line in FIGS. 3 and 4 and the second position indicated by the alternate long and short dash line in FIG. 3 and indicated by the solid line in FIG. 5 are switched. .
- the elliptical beam L2 traveling in the X direction from the beam shaping unit 21 is reflected in the Y direction by the plane mirror M11, reflected in the ⁇ Z direction by the plane mirror M12, and by the plane mirror M13.
- the reflection in the ⁇ Y direction and the reflection in the ⁇ Z direction by the plane mirror M16 are repeated, and the light travels to the plane mirror M6.
- the optical path through which the laser beam passes is defined as the first optical path.
- the laser beam L2 traveling in the X direction from the beam shaping unit 21 is reflected in the ⁇ Y direction by the plane mirror M11, reflected in the ⁇ X direction by the plane mirror M14, and the plane mirror M15.
- the reflection in the -Z direction is repeated and proceeds to the plane mirror M6.
- an optical path through which the laser beam passes is defined as a second optical path.
- the first optical path and the second optical path cross each other at the position of the plane mirror M16, and when using the laser beam that has passed through the second optical path, the plane mirror M16 is removed from the optical path by the slide mechanism 32.
- the laser beam (elliptical beam) passing through the first optical path and the laser beam (elliptical beam) passing through the second optical path have the same cross-sectional shape, and the major axis direction is shifted by 90 degrees. Therefore, by selecting the optical path in the optical path switching mechanism 31, two types of elliptical beams whose major axis directions are orthogonal to each other can be selected and emitted.
- the long-axis direction switching unit 30 bends the parallel beam L2 traveling in the X direction to form a parallel beam L3 traveling in the Z direction.
- the optical path length (distance between M4 and M11) of the parallel beam L2 the position adjustment in the X direction with respect to the scanning mechanism unit 22 is performed.
- the plane mirror M6 bends the parallel beam L3 traveling in the ⁇ Z direction in the ⁇ Y direction to form a parallel beam L4 traveling in the ⁇ Y direction.
- the optical path length (distance between M16 and M6) of the parallel beam L3 the height (Z direction) with respect to the scanning mechanism 22 is adjusted.
- the position adjustment in the Y direction with the scanning mechanism unit 22 is performed. Is done.
- the scanning mechanism unit 22 (laser optical system, moving mechanism) that scans the beam spot BS will be described.
- the scanning mechanism unit 22 is integrally fixed to the guide mirror 25 whose axis is directed in the Y direction, the plane mirror M7 that is movably attached along the guide rail 25 by a drive mechanism (not shown), and the axis is X
- the guide rail 26 is directed in the direction
- the plane mirror M8 is movably attached along the guide rail 26 by a driving mechanism (not shown).
- the plane mirror M7 and the plane mirror M8 constitute a laser optical system that forms a beam spot BS by irradiating the substrate with the elliptical beam emitted from the long-axis direction switching unit 30.
- the guide rails 25 and 26 and a driving mechanism constitute a moving mechanism for moving the laser optical system.
- the two guide rails 25 may be provided in parallel with the table 40 interposed therebetween, and the guide rail 26 may be supported so as to be movable from both sides.
- the position of the guide rail 25 closest to the plane mirror M6 is set as the origin position of the plane mirror M7.
- the angle of the plane mirror M7 is adjusted so that the parallel beam L4 from the plane mirror M6 is reflected at the origin position and the parallel beam L5 is guided to the plane mirror M8.
- the parallel beam L4 travels in the -Y direction. Since the plane mirror M7 moves in the Y direction along the guide rail 25, the parallel beam L4 is reflected by the plane mirror M7 and guided to the plane mirror M8 regardless of the position of the plane mirror M7 on the guide rail 25. .
- the plane mirror M8 reflects the parallel beam L5 and forms a beam spot BS on the substrate G. At this time, the parallel beam L5 travels in the ⁇ X direction. Since the plane mirror M8 moves in the X direction along the guide rail 26, the parallel beam L5 is reflected by the plane mirror M8 and has the same shape on the substrate G regardless of the position of the plane mirror M8 on the guide rail 26. A beam spot BS is formed.
- the major axis direction of the beam spot BS formed on the substrate faces the Y direction when the major axis direction switching unit 30 selects the first optical path. Further, when the second optical path is selected, it faces in the X direction. Therefore, when the plane mirror M8 is moved (scanned) in the X direction, the scanning direction and the major axis direction can be matched by selecting the second optical path. Further, when the plane mirror M8 is moved (scanned) in the Y direction, the scanning direction and the major axis direction can be matched by selecting the first optical path. In addition, even when either the first optical path or the second optical path is selected, the beam spot BS is irradiated onto the substrate with a parallel light beam, so even when the substrate is placed on a table surface described later. Even when the substrate is levitated from the table surface, it is irradiated with the same beam spot.
- FIG. 6 is a view showing a cross-sectional structure of the table 40.
- the table 40 is made of a porous member (for example, porous ceramic), and has an upper surface member 41 on which the substrate G (see FIG. 1) is placed, and is in close contact with the periphery of the upper surface member 41.
- a vacuum pump 46 that depressurizes the hollow space 42a through the valve 46a, and a flow source 43, an external flow channel 44, and an air source 47 that sends pressurized air to the hollow space 42a through the pressure regulating valve 47a.
- the hollow space 42 a, the flow path 43, the external flow path 44, the opening degree adjustment valve 46 a, and the vacuum pump 46 form an adsorption mechanism MA that adsorbs the substrate G to the upper surface member 41.
- the adsorption mechanism MA has an adsorption force in two stages, a strong adsorption state (adsorption force of about 30 MPa or more) and a normal adsorption state (adsorption force of about 0.03 MPa to 0.3 MPa) by the opening control valve 46a. Can be adjusted. In the former adsorption state, the glass substrate is strongly adsorbed so as not to bend even when the laser beam is irradiated. On the other hand, in the latter suction state, the suction is performed to such an extent that the position which is a general purpose of the suction mechanism can be fixed and the movement of the substrate can be prevented.
- the hollow space 42 a, the flow path 43, the external flow path 44, the on-off valve 47 a, and the air source 47 form a floating mechanism MB that floats the substrate G on the upper surface member 41.
- the levitation mechanism MB is used together with a substrate guiding mechanism 50, which will be described later, when the substrate is broken. Further, it is used together with the substrate guiding mechanism 50 when adjusting the position of the substrate in the horizontal direction.
- FIG. 7 is a view showing the structure of the substrate guiding mechanism 50.
- the substrate guiding mechanism 50 includes a pair of movable contact portions 51a and 51b attached in the vicinity of the diagonal corners 48a and 48b of the square table 40.
- Each of the movable contact portions 51a and 51b has articulated arms 53a and 53b that are translated and turned around the support shafts 52a and 52b by a driving mechanism (not shown).
- Metal contact members 54a and 54b that are turned by a drive mechanism (not shown) are attached to the tip portions of the multi-joint arms 53a and 53b.
- the abutting members 54a and 54b are attached so that their tips branch to the left and right, respectively, and the portion in contact with the substrate G has a cylindrical shape.
- the axial direction of this cylinder is oriented in the vertical direction.
- the air source 47 (FIG. 6) is operated to push the substrate G with the contact members 54a and 54b in a state where the substrate G is lifted, The substrate G moves to a desired position while lightly contacting the contact members 54a and 54b. Further, when the positions of the contact members 54a and 54b are stopped at desired positions, the positions can be fixed in a floating state. Thereafter, the substrate G can be adsorbed at the same position by stopping the air source 47 and operating the vacuum pump 46.
- the alignment mark is photographed by using the cameras 55a and 55b in which the attachment positions with respect to the coordinate system defined in the table 40 are measured in advance.
- the position of the substrate G can be automatically adjusted by calculating the amount of displacement of the substrate G from the current position, calculating the amount of movement, and moving it by the substrate guiding mechanism 50.
- the trigger mechanism 60 includes a cutter wheel 61, an elevating mechanism 62, a support shaft 63, and an articulated arm 64.
- the multi-joint arm 64 moves in the same manner as the multi-joint arms 53 a and 53 b of the board guiding mechanism 50.
- the cutting edge of the cutter hole 61 is directed in the X direction.
- the articulated arm 64 causes the cutter wheel 61 to be directly above the position where the initial crack is formed. Then, the initial crack TR is formed by temporarily lowering and pressing the cutter wheel 61 by the lifting mechanism 62.
- a second trigger mechanism 65 with the cutting edge directed in the Y direction is provided on the front side or the back side in FIG.
- efficient processing can be performed.
- the substrate guiding mechanism 50 can be operated to rotate the substrate G by 90 degrees to form an initial crack on an adjacent side.
- FIG. 8 is a block diagram showing a control system of the laser processing apparatus LM1.
- the laser processing apparatus LM1 includes a suction / levitation mechanism drive unit 81 that drives the suction mechanism MA and the floating mechanism MB of the table 40, a substrate guidance mechanism drive unit 82 that drives the movable contact portions 51a and 51b of the substrate guidance mechanism 50, and a trigger.
- the cooling nozzle driving unit 86 that sprays the refrigerant from the refrigerant nozzle
- the camera driving unit 87 that performs imaging by the CCD cameras 55a and 55b
- the long axis direction switching unit 30 Optical path switching mechanism drive unit 88 for driving the optical path switching mechanism 31 and the slide mechanism 32 interlocked therewith, beam cross section
- the driving systems of the beam cross-section switching mechanism driving unit 89 for driving the exchange mechanism 29 is controlled by the configured control unit 80 by a computer (CPU).
- the control unit 80 is connected to an input unit 91 including an input device such as a keyboard and a mouse, and a display unit 92 including a display screen for performing various displays. Necessary messages are displayed on the display screen and necessary. Instructions and settings can be entered.
- a mode information storage unit 93 is provided, and information on the general processing mode, the thick plate processing mode, and the thin plate processing mode is stored.
- the mode information storage unit 93 is provided in a memory device (HDD or the like). Each processing mode information stores a different sequence program, and when one of them is selected, the processing mode program is executed by the control unit.
- a mode input for selecting a mode is performed by the input unit 91.
- the control unit 80 executes the general machining mode when no mode input is performed or when the general machining mode is selected. On the other hand, when the thick plate processing mode and the thin plate processing mode are selected, the selected processing mode is executed.
- the substrate In general processing mode, in order to be able to use both when the substrate thickness is thin and thick, the substrate is strongly adsorbed using an adsorption mechanism during scribe processing and the substrate is lifted using a levitating mechanism during break processing. Surface.
- the thick plate processing mode is used when the substrate is thick. When the thickness of the substrate is thick, there is almost no problem that the substrate is accidentally divided during the scribe process, but there is a problem that the substrate is not divided during the break process. Therefore, the substrate is levitated using the levitating mechanism during the break. During scribing, the suction mechanism is used in a normal suction state for positioning.
- the thin plate processing mode is used when the thickness of the substrate is thin.
- the substrate When the thickness of the substrate is thin, there is hardly any problem that makes it difficult to divide during the break processing, but there arises a problem that the substrate is suddenly divided during the scribe processing. Therefore, the substrate is strongly adsorbed at the time of scribing to suppress the generation of bending moment. In the break, the substrate G is divided without rising, but the substrate is lifted by a floating mechanism so that the substrate G can be more reliably divided.
- Thick plate processing mode is used for substrates with a thickness of at least 2 mm. This is because if the thickness is greater than this, it is difficult to divide the substrate unless the substrate is lifted.
- the thin plate processing mode is used for a substrate having a thickness of at least 0.5 mm. This is because if it is thinner than this, it will be divided during scribing unless the bending of the substrate is positively suppressed.
- An intermediate substrate having a thickness of 0.5 mm to 2 mm is preferably adsorbed during scribing and floated during breaking.
- a threshold value for example, a plate thickness of 1 mm
- a thick plate processing mode may be set, and when it is thin, a thin plate processing mode may be set.
- the mode selection may be performed by inputting a numerical value of the board thickness from the input unit.
- a mechanism for measuring the thickness of the substrate may be provided so that the processing mode is automatically selected based on the measurement result.
- FIG. 9 is a flowchart showing a first example of the operation by the laser processing apparatus LM1.
- This example is an operation when the general machining mode is executed.
- the substrate G is positioned using the substrate guiding mechanism 50 (S101).
- the alignment marks on the substrate G are detected by the cameras 55a and 55b, and the amount of displacement is obtained.
- the movable contact portions 51 a and 51 b are driven to bring the contact members 54 a and 54 b closer to the substrate side surface of the substrate G.
- the flying mechanism MB is operated to lift the substrate G from the table surface.
- the movement of the glass substrate G in the horizontal direction is restricted by the contacts (four places) with the contact members 54a and 54b.
- the movable contact portions 51a and 51b are driven to move (translate and rotate) the substrate G in the horizontal direction and stop at a position where the amount of positional deviation becomes zero.
- positioning is completed in a state where the x direction of the substrate G coincides with the X direction of the laser scanning optical system.
- the floating mechanism MB is stopped and the suction mechanism MA is operated to fix the substrate G to the table surface.
- the opening degree adjusting valve 46a is set to be strongly adsorbed.
- the trigger mechanisms 60 and 65 are driven to create the initial crack TR at the scribe start positions in the X direction and the Y direction of the glass substrate G (S102).
- laser scribing in the x direction is performed (S103).
- the long-axis direction switching unit 30 is driven so that the long axis of the beam spot BS is directed in the X direction to select the second optical path.
- the scanning mechanism unit 22 is driven to adjust the positions of the plane mirrors M7 and M8, and the plane mirror M8 is moved (scanned) in the X direction while irradiating the laser beam, thereby scribing in the x direction of the glass substrate.
- the substrate G is strongly adsorbed to the table surface, and the substrate G hardly generates a bending moment, so that it is not suddenly divided.
- the movement in the Y direction (laser stop) by the plane mirror M7 and the movement in the X direction (scan) (laser irradiation) by the plane mirror M8 are alternately performed.
- the first optical path is selected by driving the long axis direction switching unit 30 so that the long axis of the beam spot BS is oriented in the Y direction.
- the scanning mechanism unit 22 is driven to adjust the positions of the plane mirrors M7 and M8, and the plane mirror M7 is moved (scanned) in the Y direction while irradiating the laser beam, thereby performing scribing in the y direction of the glass substrate.
- the substrate G is strongly adsorbed to the table surface, and since the bending moment is hardly generated in the substrate G, it is not divided. With the above processing, the scribe processing in the x direction and the y direction is completed.
- laser breaks in the y direction and the x direction are performed (S105, S106).
- Laser break may be performed first from the y direction, but laser break may be performed after returning to the x direction.
- the substrate G is brought into a floating state by the floating mechanism MB.
- the beam section switching mechanism 29 is driven to switch the laser beam from the laser light source 10 so as to go to the beam section expanding section 28.
- the substrate G is irradiated with the enlarged circular beam, and laser break by the circular beam is performed.
- the laser beam is scanned in the same manner as in laser scribing. With the above operation, laser breaks in the x and y directions are performed, and the substrate G is divided into squares.
- FIG. 10 is a flowchart showing a second example of the operation by the laser processing apparatus LM1. This example shows the operation when the mode selection is performed and the thick plate processing mode or the thin plate processing mode is selected.
- the substrate G is positioned using the substrate guiding mechanism 50 (S201). Subsequently, the trigger mechanisms 60 and 65 are driven to create the initial crack TR at the scribe start positions in the X direction and the Y direction of the glass substrate G (S202).
- the above processes are the same as S101 and S102.
- the mode input result is determined (S203).
- the process proceeds to S103 of the operation example 1 described above, and laser scribing and laser breaking are performed.
- the process proceeds to S204, and when the thick plate processing mode is selected, the process proceeds to S210.
- laser breaks in the y direction and the x direction are performed (S206, S207).
- the substrate G is temporarily brought into a floating state by the floating mechanism MB.
- the beam section switching mechanism 29 is driven to switch the laser beam from the laser light source so as to go to the beam section expanding section 28.
- the laser beam is scanned in the same manner as in laser scribing. With the above operation, laser breaks in the x and y directions are performed, and the substrate G is divided into squares.
- laser breaks in the y direction and the x direction are performed (S212, S213).
- the substrate G is always brought into a floating state by the floating mechanism MB.
- the beam section switching mechanism 29 is driven to switch the laser beam from the laser light source so as to go to the beam section expanding section 28.
- the substrate G is divided into squares.
- the present invention can be used in a laser processing apparatus that performs a cutting process on a glass substrate or the like.
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Abstract
Description
本発明の加工対象となる脆性材料基板には、ガラス基板、焼結材料のセラミックス、単結晶シリコン、半導体ウエハ、セラミック基板等が含まれる。
特に、基板の板厚が厚い場合、基板をテーブル上に載置しレーザを照射しただけではブレイク加工は困難であり、通常はブレイクバーを用いた機械的な押圧等により曲げモーメントを加えて分断を行わなければならないが、基板を浮上させることにより、レーザ照射だけでも分断が可能になる。
例えば、基板を方形に切り出す目的で、互いに直交する二方向(x方向およびy方向とする)に分断する場合(クロスカットという)、先にx方向のスクライブ加工を行い、続いて直交するy方向のスクライブ加工を行い、その後にx方向、y方向のブレイク加工を行う必要がある。この場合、最初のx方向のスクライブ加工の際にいきなり分断されてしまうと、y方向のスクライブ加工が困難になる。
クロスカット以外でも、例えば平行なスクライブラインを複数本形成する場合に、すべてのスクライブラインを形成する以前に、先に分断されてしまうことが加工プロセス上、問題となる場合がある。
本発明のレーザ加工装置によれば、テーブルの基板載置面となる多孔部材の上に、基板が載置される。制御部は、スクライブ加工時には吸着機構を作動して基板を吸着する。このとき、レーザビームが照射されても基板に曲げモーメントが加わるような変形が基板に生じないように、強く吸着する。一般に、板厚が厚い基板に比べて板厚が薄い基板は、レーザビームで加熱されると曲がりが生じやすいので、被加工基板のなかで薄い基板(通常は厚さが0.1mmまでの基板を薄い基板とする)について、曲がりが生じない程度の吸着力で吸着する。そして基板を基板載置面に強く吸着させた状態で、レーザビーム走査光学系によりレーザビームを走査し、スクライブライン(クラック)を形成する。このようにして、スクライブ加工時には基板が決して分断されないようにしてスクライブラインを形成する。続いて、浮上機構によって基板下面に気体を吹き付けて基板を浮上させる。このとき当接部材によって基板が水平移動しないように制限する。そして基板を浮上させた状態で、スクライブラインに沿ってレーザビームを走査し、分断する。一般に、板厚が薄い基板に比べて板厚が厚い基板は、テーブルに吸着したままレーザビームを照射するだけでは分断が困難なため、基板を浮上させて基板の変形が自由に生じる状態でレーザビームを照射する。これにより厚い基板でも容易に分断することができるようになる。
上記課題を解決するためになされた第二の発明のレーザ加工装置は、脆性材料からなる基板の加工面に対し一回目のレーザビームの走査によりスクライブ加工を行い、次いで形成されたスクライブラインに沿って二回目のレーザビームの走査によりブレイク加工を行うレーザ加工装置であって、基板載置面が多孔部材で形成され、多孔部材を介して基板を吸着する吸着機構と多孔部材を介して基板に気体を吹き付けて浮上させる浮上機構とが設けられたテーブルと、レーザ光源と、レーザ光源から出射されるレーザビームを基板上で走査するレーザビーム走査光学系と、少なくとも厚板加工を行うときに実行する厚板加工モードと薄板加工を行うときに実行する薄板加工モードとが選択可能な加工モード選択部と、厚板加工モードが選択されると、ブレイク加工時に浮上機構を作動して基板の変形を自由に生じさせることにより基板の分断を促進するよう制御し、薄板加工モードが選択されると、スクライブ加工時に吸着機構を作動して基板の変形を拘束することにより基板の分断を防止するように制御する加工モード別の制御部とを備えるようにしている。
このように基板の板厚に応じて、厚い基板についてはブレイク加工時の分断を容易にし、薄い基板についてはスクライブ加工時の分断を防止することができ、板厚に応じた制御を実行することができる。
これによれば、厚板加工モードの際は、スクライブ加工時に通常の位置固定に必要な吸着力で位置決めを行う。薄板加工モードの際は、浮上機構を作動して基板の変形を自由に生じさせるようにして基板の分断を促進する。
本発明によれば、基板の板厚に応じて、確実な分断加工を行うことができる。
これによれば、スクライブ加工時にこのような強い力で吸着機構を作動するので、加熱時に基板の変形を確実に抑えることができる。なお、吸引力の上限については特に示していないが、基板がこわれたりしない範囲の力で吸引する。
20 レーザ走査光学系
21 ビーム整形部
22 走査機構部
23 光路調整部
24 ビーム断面拡大部
30 長軸方向切替部
40 テーブル
41 上部部材(多孔部材)
46 真空ポンプ
47 エアー源
50 基板誘導機構
51a,51b 可動当接部
53a,53b 多関節アーム
54a,54b 当接部材
MA 吸着機構
MB 浮上機構
図1は本発明の一実施形態であるレーザ加工装置LM1の全体構成図である。レーザ加工装置LM1は、主に、レーザ光源10、レーザ走査光学系20、テーブル40、基板誘導機構50、トリガ機構60から構成される。
レーザ光源10には、CO2レーザが用いられる。CO2レーザの代わりにCOレーザ、エキシマレーザを用いてもよい。レーザ光源10からは断面形状が円形のレーザビーム(元ビームL0)が出射される。
レーザ走査光学系20は、大別すると、レーザビームの断面形状を調整するビーム整形部21、レーザビームのビーム径を拡大して出射するビーム断面拡大部24、レーザビームを基板に導いて基板G上にレーザスポットBSを形成するレーザ光学系およびこのレーザ光学系をテーブル面(XY方向)に沿って移動する移動機構によりビームスポットBSを走査する走査機構部22、ビーム整形部21およびビーム断面拡大部24のいずれかから出射したレーザビームを走査機構部22に導く光路調整部23と、レーザビーム(元ビーム)の光路をビーム整形部21とビーム断面拡大部24との間で切り替えるビーム断面切替機構29とからなる。なお、テーブル面のうちX方向を走査軸方向(スクライブを行う方向)、Y方向を送り軸方向とする。
したがって、レーザビームの光路がビーム整形部21に向かうか、ビーム断面拡大部24に向かうかによって、楕円ビームの平行光束または拡大された円形ビームの平行光束のいずれかが光路調整部23に入射するようにしてある。
また、平面鏡M16はスライド機構32によりY軸方向に移動するようにしてある。平面鏡M11と平面鏡M16とは連動し、図3および図4において実線で示す第一の位置と、図3において一点鎖線で示すとともに図5において実線で示す第二の位置とが切り替わるようにしてある。
また、第一光路、第二光路のいずれを選択している場合も、ビームスポットBSは平行光束で基板に照射されることになるので、基板が後述するテーブル面に載置されている場合でも、基板がテーブル面から浮上されている場合でも同じビームスポットで照射されることになる。
次に、テーブル40について説明する。図6はテーブル40の断面構造を示す図である。テーブル40は、多孔部材(例えば多孔質セラミック)からなり基板G(図1参照)が載置される上面部材41と、上面部材41の周囲に密着し、さらに底面が形成され、上面部材41との間に中空空間42aが形成されるボディ42と、中空空間42aに繋がる流路43が形成され、外部流路44に接続されるプラグ45と、流路43、外部流路44、開度調節弁46aを介して中空空間42aを減圧する真空ポンプ46と、流路43、外部流路44、圧力調整弁47aを介して中空空間42aに加圧空気を送るエアー源47とからなる。
通の吸着状態(吸着力が0.03MPa~0.3MPa程度)との二段階で、吸着力を調整することができるようにしてある。前者の吸着状態の場合は、レーザビームを照射してもガラス基板の曲がりが発生しないように強く吸着される。一方、後者の吸着状態の場合、吸着機構の一般的な目的である位置を固定し基板の移動を防ぐことができる程度に吸着される。
次に、基板誘導機構50について説明する。基板誘導機構50は、テーブル40上での基板の位置決めや微調整に用いられる。
図7は基板誘導機構50の構造を示す図である。基板誘導機構50は、方形のテーブル40の対角コーナー48a、48bの近傍に取り付けられる一対の可動当接部51a、51bにより構成される。各可動当接部51a、51bは、図示しない駆動機構によって、支軸52a、52bを中心に並進動作や旋回動作が行われる多関節アーム53a、53bを有する。多関節アーム53a、53bの先端部分には、図示しない駆動機構により旋回動作が行われる金属製の当接部材54a、54bが取り付けられる。当接部材54a、54bは、それぞれ先端が左右に分岐するように取り付けられ、基板Gと接する部位が円柱形にしてある。この円柱の軸方向は鉛直方向に向けられている。
次に初期亀裂形成用のトリガ機構について説明する。図1に示すように、トリガ機構60はカッターホイール61と、昇降機構62と、支軸63と、多関節アーム64とからなる。多関節アーム64は、基板誘導機構50の多関節アーム53a、53bと同様の動きをする。カッターホール61の刃先はX方向に向けてある。
初期亀裂TRを形成するときは、多関節アーム64により、カッターホイール61が初期亀裂を形成する位置の直上にくるようにする。そして、昇降機構62により、カッターホイール61を一時的に下降させて圧接することにより初期亀裂TRを形成する。
続いて、レーザ加工装置LM1の制御系について説明する。図8はレーザ加工装置LM1の制御系を示すブロック図である。レーザ加工装置LM1は、テーブル40の吸着機構MAおよび浮上機構MBを駆動する吸着/浮上機構駆動部81、基板誘導機構50の可動当接部51a、51bを駆動する基板誘導機構駆動部82、トリガ機構60の昇降機構61および多関節アーム64を駆動するトリガ機構駆動部83、走査機構22の平面鏡M7、M8を移動させる走査機構駆動部84、レーザビームを照射するレーザ駆動部85、冷却ノズルを設けてビームスポットBSに追随する冷却スポットを形成するときは冷媒ノズルから冷媒の噴霧を行う冷却ノズル駆動部86、CCDカメラ55a、55bによる撮像を行うカメラ駆動部87、長軸方向切替部30の光路切替機構31およびこれに連動するスライド機構32を駆動する光路切替機構駆動部88、ビーム断面切替機構29を駆動するビーム断面切替機構駆動部89の各駆動系が、コンピュータ(CPU)で構成される制御部80によってコントロールされる。
制御部80は、特にモード入力が行われていない場合、あるいは一般加工モードが選択された場合に一般加工モードが実行される。一方、厚板加工モード、薄板加工モードが選択されると、選択された加工モードが実行される。
厚板加工モードは、基板の板厚が厚い場合に用いる。基板の板厚が厚い場合は、スクライブ加工時には誤って分断されてしまう問題はほとんど発生しないが、ブレイク加工時に基板が分断されない問題が生じる。したがって、ブレイク時に浮上機構を用いて基板を浮上する。スクライブ時には、位置決め用に吸着機構を普通の吸着状態で使用する。
薄板加工モードは、基板の板厚が薄い場合に用いる。基板の板厚が薄い場合はブレイク加工時に分断することが困難になる問題はほとんど発生しないが、スクライブ加工時に基板がいきなり分断されてしまう問題が生じる。したがってスクライブ時に基板を強く吸着して曲げモーメントの発生を抑えるようにする。なおブレイク時は基板Gを浮上するまでもなく分断されるが、より確実に分断できるようにするために、浮上機構により基板を浮上する。
次に、レーザ加工装置LM1による典型的な動作例について説明する。ここではアライメントマークが刻まれた定型のガラス基板Gを、互いに直交する第一方向と第二方向とにスクライブする場合について説明する。説明の便宜上、第一方向をガラス基板のx方向、第二方向をガラス基板のy方向とし、アライメントマークで位置決めを行ったときに、x方向がレーザ走査光学系のX方向に一致するものとする。
ガラス基板Gがテーブル40の上に載置されると、まず、基板誘導機構50を用いて基板Gの位置決めを行う(S101)。位置決めは、カメラ55a、55bにより、基板Gのアライメントマークを検出し、位置ずれ量を求める。続いて、可動当接部51a、51bを駆動し、当接部材54a、54bを基板Gの基板側面に接近させる。同時に浮上機構MBを作動させて、基板Gをテーブル面から浮上させる。このときガラス基板Gは当接部材54a,54bとの接点(4箇所)で水平方向の移動が制限される。続いて、可動当接部51a、51bを駆動して、基板Gを水平方向に移動(並進、回転)し、位置ずれ量が0になる位置で停止させる。その結果、基板Gのx方向がレーザ走査光学系のX方向に一致した状態で位置決めが完了する。そして浮上機構MBを停止し、吸着機構MAを作動させることにより、基板Gをテーブル面に固定する。このとき開度調節弁46aは強く吸着される状態に設定される。
以上の動作により、x方向およびy方向へのレーザブレイクが行われ、基板Gは方形に分断される。
次に、レーザ加工装置LM1による第二の動作例について説明する。
図10はレーザ加工装置LM1による動作の第二の例を示すフローチャートである。この例は、モード選択が行われ、厚板加工モードまたは薄板加工モードが選択される場合の動作を示す。
Claims (6)
- 脆性材料からなる基板の加工面に対し一回目のレーザビームの走査によりスクライブ加工を行い、次いで形成されたスクライブラインに沿って二回目のレーザビームの走査によりブレイク加工を行うレーザ加工装置であって、
基板載置面が多孔部材で形成され、多孔部材を介して基板を吸着する吸着機構と多孔部材を介して基板に気体を吹き付けて浮上させる浮上機構とが設けられたテーブルと、
浮上した基板の基板側面に当接して基板の水平方向の移動を制限する当接部材と、
レーザ光源と、
レーザ光源から出射されるレーザビームを基板上で走査するレーザビーム走査光学系と、
スクライブ加工時は吸着機構を作動して基板の変形を拘束することにより基板の分断を防止し、かつ、ブレイク加工時は浮上機構を作動して基板の変形を自由に生じさせることにより基板の分断を促進するように制御する制御部とを備えたことを特徴とするレーザ加工装置。 - 脆性材料からなる基板の加工面に対し一回目のレーザビームの走査によりスクライブ加工を行い、次いで形成されたスクライブラインに沿って二回目のレーザビームの走査によりブレイク加工を行うレーザ加工装置であって、
基板載置面が多孔部材で形成され、多孔部材を介して基板を吸着する吸着機構と多孔部材を介して基板に気体を吹き付けて浮上させる浮上機構とが設けられたテーブルと、
レーザ光源と、
レーザ光源から出射されるレーザビームを基板上で走査するレーザビーム走査光学系と、
少なくとも厚板加工を行うときに実行する厚板加工モードと薄板加工を行うときに実行する薄板加工モードとが選択可能な加工モード選択部と、
厚板加工モードが選択されると、ブレイク加工時に浮上機構を作動して基板の変形を自由に生じさせることにより基板の分断を促進するよう制御し、薄板加工モードが選択されると、スクライブ加工時に吸着機構を作動して基板の変形を拘束することにより基板の分断を防止するように制御する加工モード別の制御部とを備えたことを特徴とするレーザ加工装置。 - 前記加工モード別の制御部は、さらに厚板加工モードでのスクライブ加工時には吸着機構を薄板加工モードよりも弱い吸着力で作動して基板の位置決めを行い、薄板加工モードでのブレイク加工時には浮上機構を作動して基板の変形を自由に生じさせることにより基板の分断を促進する制御を行う請求項2に記載のレーザ加工装置。
- スクライブ加工時に吸着機構を作動して基板の変形を拘束する際に、30MPa以上の力で吸引する請求項1または請求項2に記載のレーザ加工装置。
- 脆性材料からなる基板の加工面に対し一回目のレーザビームの走査によりスクライブ加工を行い、次いで形成されたスクライブラインに沿って二回目のレーザビームの走査によりブレイク加工を行うレーザ加工方法であって、
スクライブ加工時は基板を基板載置面に吸着させて基板の変形を拘束することにより基板の分断を防止しながらスクライブラインを形成し、
ブレイク加工時はスクライブ加工時と同じ水平位置で基板を浮上させて基板の変形を自由に生じさせることにより基板の分断を促進することを特徴とするレーザ加工方法。 - 脆性材料からなる基板の加工面に対し一回目のレーザビームの走査によりスクライブ加工を行い、次いで形成されたスクライブラインに沿って二回目のレーザビームの走査によりブレイク加工を行うレーザ加工方法であって、
基板の板厚が少なくとも0.5mm以下のときは、スクライブ加工時は基板を基板載置面に吸着させて基板の変形を拘束することにより基板の分断を防止し、
基板の板厚が少なくとも2mm以上のときは、ブレイク加工時は基板を基板載置面から浮上させて基板の変形を自由に生じさせることにより基板の分断を促進することを特徴とするレーザ加工方法。
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WO2015080969A1 (en) * | 2013-11-26 | 2015-06-04 | Corning Incorporated | Method and system of laser cutting a sheet material |
CN107030390A (zh) * | 2016-02-04 | 2017-08-11 | 苏州沃特维自动化***有限公司 | 一种太阳能电池片切割装置 |
WO2019049596A1 (ja) * | 2017-09-07 | 2019-03-14 | Sts合同会社 | 取付具 |
CN113681172A (zh) * | 2021-08-06 | 2021-11-23 | 深圳市鑫达辉软性电路科技有限公司 | 一种柔性电路板生产用裁剪装置 |
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KR101465014B1 (ko) * | 2013-06-26 | 2014-11-26 | 주식회사 엘티에스 | 강화유리 절단장치 |
JP6829118B2 (ja) | 2017-03-16 | 2021-02-10 | 株式会社日本製鋼所 | レーザ照射装置、レーザ照射方法、及び半導体装置の製造方法 |
CN113478101A (zh) * | 2021-07-21 | 2021-10-08 | 常州机电职业技术学院 | 一种芯片基板切割设备用的加工防护装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0919782A (ja) * | 1995-07-04 | 1997-01-21 | Hitachi Cable Ltd | 基板の加工方法及びその加工装置 |
JPH11785A (ja) * | 1997-06-11 | 1999-01-06 | Matsushita Electric Ind Co Ltd | レーザー加工機の被加工物位置決め装置 |
JP2005088014A (ja) * | 2003-09-12 | 2005-04-07 | Sumitomo Heavy Ind Ltd | クランプ機構及びクランプ機構を有するレーザ加工機 |
WO2007037118A1 (ja) * | 2005-09-28 | 2007-04-05 | Shibaura Mechatronics Corporation | 脆性材料のレーザ割断装置、レーザ割断システム及びその方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2004217492A (ja) * | 2003-01-17 | 2004-08-05 | Murakami Corp | ガラス板材の切抜方法 |
JP2005028423A (ja) * | 2003-07-09 | 2005-02-03 | Disco Abrasive Syst Ltd | レーザー加工方法およびレーザー加工装置 |
JP2007246298A (ja) * | 2006-03-13 | 2007-09-27 | Shibuya Kogyo Co Ltd | 脆性材料の割断方法とその装置 |
-
2008
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0919782A (ja) * | 1995-07-04 | 1997-01-21 | Hitachi Cable Ltd | 基板の加工方法及びその加工装置 |
JPH11785A (ja) * | 1997-06-11 | 1999-01-06 | Matsushita Electric Ind Co Ltd | レーザー加工機の被加工物位置決め装置 |
JP2005088014A (ja) * | 2003-09-12 | 2005-04-07 | Sumitomo Heavy Ind Ltd | クランプ機構及びクランプ機構を有するレーザ加工機 |
WO2007037118A1 (ja) * | 2005-09-28 | 2007-04-05 | Shibaura Mechatronics Corporation | 脆性材料のレーザ割断装置、レーザ割断システム及びその方法 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015080969A1 (en) * | 2013-11-26 | 2015-06-04 | Corning Incorporated | Method and system of laser cutting a sheet material |
CN107030390A (zh) * | 2016-02-04 | 2017-08-11 | 苏州沃特维自动化***有限公司 | 一种太阳能电池片切割装置 |
WO2019049596A1 (ja) * | 2017-09-07 | 2019-03-14 | Sts合同会社 | 取付具 |
JPWO2019049596A1 (ja) * | 2017-09-07 | 2019-11-07 | Sts合同会社 | 取付具 |
CN113681172A (zh) * | 2021-08-06 | 2021-11-23 | 深圳市鑫达辉软性电路科技有限公司 | 一种柔性电路板生产用裁剪装置 |
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