WO2022091977A1 - Outil traceur, dispositif traceur et joint - Google Patents

Outil traceur, dispositif traceur et joint Download PDF

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Publication number
WO2022091977A1
WO2022091977A1 PCT/JP2021/039113 JP2021039113W WO2022091977A1 WO 2022091977 A1 WO2022091977 A1 WO 2022091977A1 JP 2021039113 W JP2021039113 W JP 2021039113W WO 2022091977 A1 WO2022091977 A1 WO 2022091977A1
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WO
WIPO (PCT)
Prior art keywords
axis
holder
joint
cutting edge
scribe
Prior art date
Application number
PCT/JP2021/039113
Other languages
English (en)
Japanese (ja)
Inventor
春香 竹原
良太 阪口
浩 曽山
慎太郎 大澤
Original Assignee
三星ダイヤモンド工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三星ダイヤモンド工業株式会社 filed Critical 三星ダイヤモンド工業株式会社
Priority to JP2022559095A priority Critical patent/JPWO2022091977A1/ja
Publication of WO2022091977A1 publication Critical patent/WO2022091977A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D5/00—Fine working of gems, jewels, crystals, e.g. of semiconductor material; apparatus or devices therefor
    • 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
    • C03B33/027—Scoring tool holders; Driving mechanisms therefor

Definitions

  • the present invention relates to a scribe tool, a scribe device and a joint.
  • a break process may be performed due to the division of brittle material substrates.
  • a break step of a glass substrate is usually performed.
  • a scribe process is performed to form a scribe line on the brittle material substrate.
  • the brittle material substrate is broken along this scribe line.
  • the scribe line is a groove formed on the brittle material substrate for the break process.
  • a scribe device is used to efficiently form the scribe line.
  • the scribe device is attached to an installation means (for example, a table, a conveyor, etc.) on which a brittle material substrate is installed and a brittle material substrate on the installation means.
  • an installation means for example, a table, a conveyor, etc.
  • a scribe head provided so as to face each other, a holder joint provided at the tip of the scribe head, and a wheel tip for forming a scribe line, one end of which is detachably attached to the holder joint and the other end of which is rotatably attached.
  • a scribe head provided so as to face each other
  • a holder joint provided at the tip of the scribe head
  • a wheel tip for forming a scribe line, one end of which is detachably attached to the holder joint and the other end of which is rotatably attached.
  • the scribe device uses a wheel tip, that is, a wheel cutting edge. Since the wheel cutting edge rolls on the brittle substrate instead of sliding, it is less susceptible to friction. Therefore, the wheel cutting edge generally has a long life. On the other hand, from the viewpoint of avoiding a decrease in strength reliability at the scribed portion, a fixed cutting edge is usually preferable.
  • a fixed cutting edge is usually preferable.
  • the configuration of the combination of the joint and the holder has been studied when the cutting edge is the wheel cutting edge as described above, the case where the cutting edge is the fixed cutting edge has not been sufficiently studied so far.
  • the configuration of the combination of the joint and the holder suitable for optimizing the posture of the cutting edge with respect to the brittle material substrate has not been sufficiently studied so far.
  • the fixed cutting edge slides on the substrate instead of rolling, so it receives strong friction. Therefore, the fixed cutting edge is easily worn and therefore has a short life. For example, when a point cutting edge made of single crystal diamond is used as a typical fixed cutting edge and a glass substrate is scribed, it is often the case that only a scribe distance of about several tens of meters can be secured without replacing the cutting edge.
  • the present invention has been made to solve the above problems, one of which is a scribe tool having a fixed cutting edge, holder and joint, and the posture of the cutting edge with respect to a brittle material substrate. It is to provide a scribe tool that can be optimized. A further object is to provide a scribe tool that can extend the life of the cutting edge due to wear.
  • the scribe tool of the present invention has a joint, a holder, and a cutting edge.
  • the joint is rotatably supported around the first axis.
  • the holder is fixed to the joint along a second axis tilted from the first axis.
  • the cutting edge is fixed to the holder.
  • the cutting edge has an on-axis point, which is a point located on the first axis.
  • the posture angle of the holder around the second axis can be changed with respect to the joint, and the cutting edge has a plurality of points that can be regarded as on-axis points by changing the posture angle.
  • a holder is fixed to a joint rotatably supported around the first axis along a second axis inclined from the first axis.
  • the holder fixes the cutting edge, and the cutting edge has an on-axis point on the first axis.
  • the cutting edge having the on-axis point on the first axis can be fixed by the holder along the second axis inclined from the first axis. Therefore, even if the direction of the first axis is limited to one due to the specifications of the scribe device, the posture of the cutting edge with respect to the brittle material substrate can be adjusted by appropriately adjusting the design of the angle of the second axis with respect to the first axis. Can be optimized.
  • the cutting edge has a plurality of points that can be regarded as on-axis points by changing the posture angle of the holder around the second axis.
  • a plurality of points can be switched and used as on-axis points for scribe. Therefore, the life of the cutting edge due to wear can be significantly extended.
  • FIG. It is a perspective view which shows roughly one process of the assembly method of the scribe tool of FIG. It is a perspective view which shows roughly one process of the assembly method of the scribe tool of FIG. It is a perspective view which shows roughly one process of the assembly method of the scribe tool of FIG. It is a partial cross-sectional perspective view schematically showing one step of the assembly method of the scribe tool of FIG. It is a partial cross-sectional perspective view schematically showing one step of the assembly method of the scribe tool of FIG. It is a figure which shows the structure which attached the spare joint instead of the joint in the scribe tool of FIG. It is sectional drawing which shows the modification of the scribe tool of FIG. It is a perspective view which shows roughly one process of the assembly method of the scribe tool of FIG.
  • FIG. 1 is a perspective view schematically showing an example of the configuration of the scribe device 1 according to the embodiment.
  • the z-axis is upward along gravity, so each of the x-axis and y-axis is horizontal perpendicular to the direction of gravity, in other words the xy plane is a horizontal plane.
  • the scribe device 1 has a table 106 that supports a brittle material substrate 107 (for example, a glass substrate), a scribe head 112, and a scribe tool 1100 attached thereto.
  • the scribe tool 1100 has a joint 210, a holder 310U, and a cutting edge 900 (see FIG. 2).
  • the joint 210 is attached to the tip end portion (lower end portion in FIG. 1) of the scribe head 112.
  • the holder 310U is attached to the joint 210, whereby is indirectly attached to the scribe head 112 via the joint 210.
  • a cutting edge is fixed to the lower end of the holder 310U so as to face the table 106.
  • the scribe device 1 scribs the brittle material substrate 107 by relatively moving the table 106 and the scribe head 112 in the xy in-plane direction while pressing the cutting edge onto the brittle material substrate 107.
  • the scribe head 112 holds the joint 210 so that the joint 210 can rotate around the z-axis for the purpose of adjusting the direction of the cutting edge 900 on the xy plane. This rotation may be performed by a motor (not shown) built into the scribe head 112. By rotating the joint 210 around the z-axis, the orientation of the cutting edge 900 around the z-axis can be adjusted. By adjusting the direction of the cutting edge 900 during the scribe operation, it is possible to stably perform scribe along a curve. When it is not necessary to adjust the direction of the cutting edge 900 as in the case where a linear scribe process is performed, the scribe head 112 stops the motor so that the motor does not rotate during the process. By keeping it at, the orientation of the joint 210 around the z-axis may be kept constant.
  • the moving table 101 is movably held along a pair of guide rails 102a and 102b in the y-axis direction.
  • the ball screw 103 is screwed with the moving table 101.
  • the ball screw 103 is rotated by the drive of the motor 104, and the moving table 101 is moved along the guide rails 102a and 102b in the y-axis direction.
  • a motor 105 is provided on the upper surface of the moving table 101.
  • the motor 105 rotates the table 106 in the xy plane and positions it at a predetermined angle.
  • the brittle material substrate 107 is placed on the table 106 and held by, for example, vacuum suction means (not shown).
  • a bridge 110 is erected by columns 11la and 11lb along the x-axis direction so as to straddle the moving table 101 and the table 106 above the moving table 101.
  • the scribe head 112 is movable in the x-axis direction along the guide 113 provided on the bridge 110.
  • the motor 114 moves the scribe head 112 along the x-axis direction.
  • the motor 104, the guide rails 102a, 102b, and the ball screw 103 are moving portions for moving the table 106 in the y-axis direction, and the bridge 110, the columns 11la, 111b, and the guide 113 are scribe heads. It is a moving part that moves 112 in the x-axis direction, and the motor 105 is a moving part that rotates the table 106, and these moving parts make the table 106 and the scribe head 112 relatively movable.
  • ⁇ Structure of scribe tool> 2 to 5 are diagrams schematically showing the configuration of the scribe tool 1100 from various viewpoints, and FIG. 6 is a cross-sectional view schematically showing the configuration of the scribe tool 1100.
  • the scribe tool 1100 has a joint 210, a holder 310U, and a cutting edge 900.
  • the holder 310U is configured by assembling a plurality of parts.
  • these plurality of parts include an outer member 310, an inner member 410, and a mounting screw 500.
  • the inner member 410 has a main body portion 411 and a claw portion 412 for gripping the cutting edge 900.
  • the inner member 410 is inserted into the hollow portion of the outer member 310.
  • a part of this cavity constitutes a screw hole for the mounting screw 500.
  • the mounting screw 500 is attached to the outer member 310 by being inserted into the screw hole.
  • a recess 500h for inserting a wrench is provided at one end of the mounting screw 500. By turning the mounting screw 500 with a wrench, the other end of the set screw collides with the main body 411 of the inner member 410. As a result, the inner member 410 is fixed to the outer member 310.
  • the scribe head 112 holds the joint 210 so that the joint 210 can rotate about the z-axis.
  • the first axis AX1 is along the z-axis, so that the joint 210 is rotatably supported around the first axis AX1 by the scribe head 112.
  • the joint 210 may have a shaft portion MA and a main body portion MM fixed to the shaft portion MA.
  • the shaft portion MA and the main body portion MM may be integrally formed of the same material.
  • the joint 210 is fixed to the scribe head 112 by gripping the shaft portion MA to the scribe head 112.
  • the shaft portion MA preferably has a shape corresponding to the orientation of the joint 210 around the first shaft portion AX1 (in FIG.
  • the shaft portion MA preferably extends along the first axis AX1, and in the configuration shown in FIG. 2, the shaft portion MA has a cylindrical shape extending along the first shaft portion AX1 (assuming that the notch portion is ignored).
  • the main body portion MM has a cavity portion 210f extending along the second axis AX2 inclined from the first axis AX1.
  • the holder 310U is fixed to the joint 210 along the second axis AX2 by being inserted into the hollow portion 210f of the joint 210.
  • the second axis AX2 is tilted from the first axis AX1.
  • the angle formed by the first axis AX1 and the second axis AX2 is larger than 0 ° and smaller than 90 °.
  • the second axis AX2 is preferably tilted from the first axis AX1 by 50 ° or more and 55 ° or less, and more preferably 51 ° or more and 53 ° or less.
  • the cutting edge 900 is fixed to the holder 310U.
  • the cutting edge 900 is not a wheel cutting edge but a fixed cutting edge.
  • the cutting edge 900 has an on-axis point PAX, which is a point located on the first axis AX1.
  • the cutting edge 900 has at least a point PTa (first point) and a point PTb (second point) as a plurality of points.
  • any of the plurality of points can be set as the on-axis point PAX.
  • FIG. 5 shows a case where the point Pta is selected as the on-axis point PAX.
  • the cutting edge 900 is preferably made of diamond.
  • the cutting edge 900 is preferably a diamond piece.
  • the diamond preferably has a ⁇ 100> orientation along the second axis AX2.
  • the posture angle of the holder 310U around the second axis AX2 with respect to the joint 210 can be changed.
  • the fitting structure between the joint 210 and the holder 310U is configured by the hollow portion 210f provided in the main body portion MM of the joint 210 so that the posture angle can be changed only discretely.
  • the holder 310U is partially inserted into the cavity 210f (FIG. 6) of the joint 210.
  • the posture angle of the holder 310U can be changed by changing the orientation of the holder 310U at the time of this insertion.
  • the holder 310U can take at least a first posture angle and a second posture angle with respect to the joint 210.
  • the first posture angle of the holder 310U is the posture angle shown in FIG. 5
  • the second posture angle of the holder 310U is the case where the holder 310U is rotated by 180 ° in the joint 210 in FIG. Posture angle.
  • the point PTa and the point PTb correspond to the first posture angle and the second posture angle, respectively, and become the on-axis point PAX (FIG. 6).
  • the point Pta and the point PTb (FIG. 5) of the cutting edge 900 are arranged so that they can be made into an on-axis point PAX (FIG. 6) simply by changing the posture angle of the holder 310U around the second axis AX2. ..
  • the points PTa and the point PTb are located at different positions from each other, they are arranged at the same position in the direction along the second axis AX2 and are separated from the second axis AX2 by the same distance. In order to satisfy such a dimensional condition, as shown in FIG.
  • the distance between the end face 310p of the holder 310U and each of the points PTa and the point PTb is the extending direction of the holder 310U (vertical direction in FIG. 7). ) Is commonly used as the distance LN. In order to control the dimensions in this way, it is preferable that the cutting edge 900 is precisely polished after the unit shown in FIG. 7 is assembled. After the unit is mounted in the cavity 210f of the joint 210, the direction of the distance LN (the extending direction of the holder 310U) becomes the direction along the second axis AX2.
  • the holder 310U has rotational symmetry around the second axis AX2. Specifically, as can be seen from FIG. 5, the holder 310U has a double symmetry around the second axis AX2. It should be noted that in the present specification, a structure that does not substantially affect the fixing of the holder 310U to the joint 210 (for example, a small hole or notch for indicating the orientation of the member) is used when considering the rotational symmetry of the holder 310U. It shall be ignored. Further, in the present embodiment, the holder 310U having double symmetry is exemplified, but the number of times of symmetry is not limited to two times.
  • the scribe tool 1100 preferably has a positioning pin 600 (positioning member).
  • the positioning pin 600 limits the position of the holder 310U along the second axis AX2 with respect to the joint 210 by partially closing the cavity 210f.
  • the positioning pin 600 is attached to the joint 210 by being inserted into a hole provided in the joint 210.
  • the holder 310U is prohibited from being positioned above the positioning pin 600 in the direction of the second axis AX2.
  • the scribe tool 1100 preferably has a set screw 700.
  • the set screw 700 secures the holder 310U to the joint 210 at the position defined by the positioning pin 600.
  • the set screw 700 is attached to the joint 210 by being inserted into a screw hole provided in the joint 210.
  • a recess 700h for inserting a wrench is provided at one end of the set screw 700.
  • the set screw 700 By turning the set screw 700 with a wrench, the other end of the set screw collides with one side of the holder 310U.
  • the other side portion of the holder 310U is pressed against the V-shaped recess SV (FIG. 5) of the cavity portion 210f (FIG. 6) of the joint 210.
  • the holder 310U is firmly fixed to the joint 210.
  • ⁇ Assembly method of scribe tool> 9 to 13 are diagrams schematically showing the steps of the assembly method of the scribe tool 1100 (FIG. 6) in this order.
  • the positioning pin 600 is inserted into the hole of the joint 210.
  • the cutting edge 900 is attached to the claw portion 412 of the inner member 410.
  • the inner member 410 to which the cutting edge 900 is fixed is housed in the outer member 310 and is attached by the mounting screw 500.
  • the holder 310U is partially inserted into the cavity 210f of the joint 210 with reference to FIGS. 12 and 13, both of which are partially cross-sectional views. Then, the holder 310U is fixed to the joint 210 by the set screw 700. From the above, the scribe tool 1100 can be obtained.
  • FIG. 14 is a diagram schematically showing a configuration in which a spare joint 210M is attached in place of the joint 210 in the scribe tool 1100 (FIG. 6).
  • the spare joint 210M will be rotatably supported around the first axis AX1 by being replaced with the joint 210.
  • the spare joint 210M has a fitting structure for fixing the holder 310U to the spare joint 210M along the third axis AX3.
  • the third axis AX3 is tilted from the first axis AX1 and the second axis AX2. Since the configurations of the spare joint 210M other than the above are almost the same as those of the joint 210 (FIG. 6) described above, the same or corresponding elements are designated by the same reference numerals, and the description thereof will not be repeated.
  • FIG. 15 is a cross-sectional view showing the configuration of the scribe tool 1200M, which is a modification of the scribe tool 1100 (FIG. 6).
  • the scribe tool 1200M has a joint 210, a holder 310U including an outer member 310, and a joint 220 and a holder 320U including an outer member 320 in place of (FIG. 6).
  • the holder 320U is at least partially made of magnetic material.
  • the scribe tool 1200M has a magnet 800.
  • the magnet 800 generates a magnetic force acting on the holder 320U so that the positioning pin 600 and the holder 320U are pressed against each other.
  • the magnet of the holder 320U is opposed to the other end (upper right end in the figure) opposite to the one end (lower left end in the figure) to which the cutting edge 900 is fixed. 800 is arranged.
  • the magnet 800 is mounted in the cavity 220f of the joint 220. Further, the joint 220 may be provided with a cover plate 880 that covers the magnet 800.
  • the holder 320U is prohibited from being positioned beyond the positioning pin 600 in the direction of the second axis AX2 by the side inclined surface 320p of the holder 320U hitting the positioning pin 600. It is preferable that the side inclined surface 320p is arranged away from the distance between the magnet 800 and the holder 320U.
  • the side inclined surface 320p may be inclined from a plane perpendicular to the second axis AX2.
  • 16 to 21 are diagrams schematically showing the steps of the assembly method of the scribe tool 1200M (FIG. 15) in this order.
  • the positioning pin 600 is inserted into the hole of the joint 210.
  • the magnet 800 is attached to the joint 220 so as to be arranged in the cavity 220f of the joint 220.
  • a cover plate 880 covering the magnet 800 is attached to the joint 220.
  • the cutting edge 900 is attached to the claw portion 412 of the inner member 410.
  • the inner member 410 to which the cutting edge 900 is fixed is housed in the outer member 320 and is attached by the mounting screw 500.
  • the holder 320U is partially inserted into the cavity 220f of the joint 220 with reference to FIGS. 21 and 22, both of which are partial cross-sectional views.
  • the position of the holder 320U is fixed by the side inclined surface 320p of the holder 320U hitting the positioning pin 600 while the holder 320U receives an attractive force toward the magnet 800 by the magnetic force. From the above, the scribe tool 1200M can be obtained.
  • the holder 310U is fixed to the joint 210 rotatably supported around the first axis AX1 along the second axis AX2 tilted from the first axis AX1.
  • the holder 310U fixes the cutting edge 900, and the cutting edge 900 has an on-axis point PAX on the first axis AX1.
  • the cutting edge 900 having the on-axis point PAX on the first axis AX1 can be fixed by the holder 310U along the second axis AX2 tilted from the first axis AX1. Therefore, when the direction of the first axis AX1 is limited to one due to the specifications of the scribe device 1 (FIG.
  • the cutting edge may have only one point as a point that can be an on-axis point PAX.
  • the cutting edge 900 has a plurality of points PTa and PTb (FIG. 5) which can be regarded as an on-axis point PAX (FIG. 6) by changing the posture angle of the holder 310U around the second axis AX2. )have.
  • a plurality of points can be switched and used as the on-axis point PAX for scribe. Therefore, the life of the cutting edge 900 due to wear can be significantly extended.
  • a fitting structure is provided between the joint 210 and the holder 310U so that the posture angle can be changed only discretely.
  • the point Pta and the point PTb (FIG. 5) of the cutting edge 900 correspond to the first attitude angle and the second attitude angle of the holder 310U, respectively, and become the on-axis point PAX (FIG. 6). This makes it possible to prevent the posture of the on-axis point PAX from shifting with respect to the brittle material substrate 107.
  • the plurality of points PTa and PTb (FIG. 5) of the cutting edge 900 are arranged so as to be the on-axis point PAX (FIG. 6) only by changing the posture angle of the holder 310U around the second axis AX2. ..
  • the posture angle of the holder 310U can be changed at such a limited position. can.
  • the holder 310U has rotational symmetry (specifically, double symmetry) around the second axis AX2. Thereby, the posture angle of the holder 310U can be changed corresponding to the rotational symmetry.
  • the cutting edge 900 is crystallographically made of diamond having a ⁇ 100> orientation along the second axis AX2. Thereby, the processing for forming the surface inclined at a predetermined angle from the ⁇ 100> direction on the cutting edge 900 can be easily performed by using the direction corresponding to the second axis AX2 as a reference. Specifically, after the unit shown in FIG. 7 is assembled, the cutting edge 900 is precisely machined with reference to the normal direction of the end face 310p (the extending direction of the holder 310U). The crystallographic properties of each of PTa and PTb can be precisely controlled.
  • the ⁇ 100> direction of the cutting edge 900 can be tilted from the first axis AX1.
  • This inclination that is, the inclination of the second axis AX2 from the first axis AX1 is preferably 50 ° or more and 55 ° or less, and more preferably 51 ° or more and 53 ° or less.
  • the spare joint 210M (FIG. 14) has a fitting structure for fixing the holder 310U to the spare joint 210M along the third axis AX3, and the third axis AX3 has a fitting structure. It is tilted from the first axis AX1 and the second axis AX2 (FIG. 6).
  • the wear of the cutting edge 900 progresses to a non-negligible level while using the joint 210 (FIG. 6)
  • the posture of the cutting edge 900 is adjusted by using the spare joint 210M instead of the joint 210.
  • the contact angle between the cutting edge 900 and the brittle material substrate 107 (FIG. 1) changes.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

La présente invention concerne un joint (210) qui est soutenu de façon rotative autour d'un premier axe (AX1). Un support (310U) est fixé au joint (210) le long d'un deuxième axe (AX2) incliné par rapport au premier axe (AX1). Une pointe de lame (900) est fixée au support (310U). La pointe de lame (900) comporte un point sur l'axe (PAX) qui est un point situé sur le premier axe (AX1).
PCT/JP2021/039113 2020-10-29 2021-10-22 Outil traceur, dispositif traceur et joint WO2022091977A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2022559095A JPWO2022091977A1 (fr) 2020-10-29 2021-10-22

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020-181376 2020-10-29
JP2020181376 2020-10-29

Publications (1)

Publication Number Publication Date
WO2022091977A1 true WO2022091977A1 (fr) 2022-05-05

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PCT/JP2021/039113 WO2022091977A1 (fr) 2020-10-29 2021-10-22 Outil traceur, dispositif traceur et joint

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JP (1) JPWO2022091977A1 (fr)
TW (1) TW202225111A (fr)
WO (1) WO2022091977A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018052129A (ja) * 2017-12-29 2018-04-05 三星ダイヤモンド工業株式会社 スクライビングホイール及びその製造方法
JP2019112294A (ja) * 2017-12-21 2019-07-11 日本電気硝子株式会社 ガラス基板の製造方法
US20200180994A1 (en) * 2018-12-06 2020-06-11 Schott Ag Glass element with cut edge and method of producing same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019112294A (ja) * 2017-12-21 2019-07-11 日本電気硝子株式会社 ガラス基板の製造方法
JP2018052129A (ja) * 2017-12-29 2018-04-05 三星ダイヤモンド工業株式会社 スクライビングホイール及びその製造方法
US20200180994A1 (en) * 2018-12-06 2020-06-11 Schott Ag Glass element with cut edge and method of producing same

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TW202225111A (zh) 2022-07-01

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