JP2013023403A - Scribe head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide a scribe head, which is appropriate for a scribe line to be formed.SOLUTION: The scribe head mounted in a scribing device 10 and forming scribe lines on a substrate includes a base member 21, a holder holding member 23 mounted in the base member 21, a holder 24 capable of mounting a cutter wheel 42 in a top end thereof and held in the holder holding member 23, and holder rotation control mechanisms 35c and 45. The holder rotation control mechanisms 35c and 45 selectively switch the holding state of the holder 24 to the holder holding member 23 so that the holder 24 is rotationally free around a rotation axis vertical to a work surface, or so that the rotation around the rotation axis of the holder 24 is controlled.

Description

  The present invention relates to a scribing head, and more particularly to a scribing head that is mounted on a scribing device and forms a scribing line on a brittle material substrate that is a workpiece.

  For example, when a glass substrate is cut, a cutting edge of a tool such as a cutter wheel is pressed against the glass substrate, and the cutting edge is moved along a scribe line to form a scribe line. Next, the glass substrate is divided by applying a predetermined force to the glass substrate along the scribe line.

  When the glass substrate is divided as described above, for example, a scribing apparatus as shown in Patent Document 1 is used. The apparatus disclosed in Patent Document 1 is an apparatus for cutting an LCD substrate on which two glass substrates are bonded, for example, and includes two scribe heads and holding and conveying means. The two scribe heads are provided so as to face each other in order to scribe each of the front surface and the back surface of the substrate. The holding and conveying means conveys the substrate between the two scribe heads.

  In the apparatus disclosed in Patent Document 1, a scribe line may be formed at the same position on the upper and lower glass substrates, and a scribe line may be formed at a different position on the upper and lower glass substrates.

  When the scribe lines are formed at the same position with respect to the upper and lower glass substrates, the scribe heads to which the cutter wheels are attached are pressed so as to sandwich both glass substrates from above and below to form the scribe lines.

  On the other hand, when forming scribe lines at different positions on the upper and lower glass substrates, the bridge on which one scribe head is mounted is moved, and the upper and lower scribe heads cause the scribe lines to be located at different positions on the front and back surfaces of the substrate. It is formed.

  Patent Document 2 discloses a substrate cutting method for the purpose of shortening the processing time. Here, when a plurality of unit substrates are cut out from the mother substrate, the scribe head is moved by a single stroke so that the pressing of the cutter wheel onto the substrate is not interrupted.

WO 02/057192 A1 WO 2005/113212 A1

  In the conventional scribing devices disclosed in Patent Documents 1 and 2, when the moving direction of the scribe head is changed, the cutter wheel needs to smoothly follow the changed moving direction. Therefore, the holder to which the cutter wheel is attached is supported by the holder holding member so as to be rotatable about an axis perpendicular to the substrate surface.

  On the other hand, especially when the cross section divided by the scribe line appears as it is as the cross section of the product, the undulation of the processed scribe line must be avoided. In order to avoid swell of the scribe line, it is desirable that the rotation of the holder to which the cutter wheel is attached is restricted.

  An object of the present invention is to make it possible to easily obtain a scribe head suitable for a scribe line to be formed.

  A scribing head according to a first invention is attached to a scribing device and is used to form a scribing line on a brittle material substrate that is a workpiece, comprising a base member, a holder holding member attached to the base member, and a tip And a holder that is held by a holder holding member, and a holder rotation control mechanism. The holder rotation control mechanism selectively selects the holder holding state with respect to the holder holding member so that the holder can rotate about the rotation axis perpendicular to the workpiece surface or the rotation about the rotation axis of the holder is restricted. It is a mechanism to switch to.

  Here, when the scribe line is formed by changing the moving direction of the scribe head, the holder may be rotated by the holder rotation control mechanism so as to be rotatable about the rotation axis. By using such a scribe head, the holder on which the cutter is mounted can smoothly follow the movement of the scribe head to form a scribe line. In addition, when forming a straight scribe line, it is sufficient that the rotation around the rotation axis of the holder is restricted. By using such a scribe head, it is possible to form a scribe line in which the rotation of the holder to which the cutter is attached is restricted and the undulation is suppressed.

  As described above, the scribe head can be easily switched to an appropriate state by the scribe line.

  The scribing head according to the second invention is the scribing head according to the first invention, wherein the holder rotation control mechanism is detachably attached to an opening formed radially inward on the outer peripheral surface of the holder and a holder holding member. And an engaging member partially inserted into the opening of the holder.

  Here, the holder control mechanism can be configured at a low cost with a simple configuration.

  The scribing head according to the third invention is the scribing head according to the second invention, wherein the holder rotation control mechanism restricts the rotation angle of the holder to 5 ° or less when restricting the rotation of the holder around the rotation axis.

  The scribe head according to a fourth aspect of the present invention is the scribe head according to the second or third aspect, further comprising a kingpin assembly including a holder. The kingpin assembly includes a holder, a pair of bearings, a rotating member, and a support member. The holder has a rod portion extending along the rotation axis and a cutter holding portion to which a cutter is attached at the tip. The pair of bearings rotatably supports the holder with respect to the holder holding member. The rotating member is fixed to the rod portion of the holder and rotates together with the holder. The support member is disposed with a gap around the outer periphery of the rotating member, and is fixed to the holder support member. The opening is formed in the rotating member, and the engaging member is provided in the support member.

  The scribing head according to a fifth aspect of the present invention is the scribing head according to any one of the first to fourth aspects, wherein the rotation center of the holder is offset from the cutter mounting center of the holder.

  As described above, according to the present invention, a scribe head suitable for a scribe line to be formed can be easily obtained.

The figure which shows an example of the board | substrate processed with the scribing apparatus provided with the scribing head by one Embodiment of this invention. The figure explaining the scribe line in the said scribe apparatus. The figure which shows an example of the board | substrate processed with the scribing apparatus provided with the scribing head by one Embodiment of this invention. FIG. 2 is a schematic plan view of the scribe device. The schematic front view of the said scribe apparatus. 1 is an external perspective view of a scribe head according to an embodiment of the present invention. FIG. 3 is a partial cross-sectional view of the scribe head. The fragmentary sectional view of a kingpin assembly.

  Hereinafter, a scribing apparatus for dividing a mother substrate for manufacturing a liquid crystal display panel will be described as an example.

[work]
First, a workpiece as a processing target will be described. As shown in FIG. 1, a mother substrate MG for manufacturing a liquid crystal display panel is configured by bonding two substrates G1 and G2 (see FIG. 2) on which a pattern P of a plurality of unit display panels (unit substrates) is formed. Has been. Specifically, as shown in FIG. 2, a first substrate (also referred to as a CF side substrate) G1 on which a plurality of color filters are formed, and a second substrate (also referred to as a TFT substrate) on which a plurality of TFTs and terminal regions are formed. G2 is bonded to each other with a sealing material enclosing the liquid crystal interposed therebetween. Here, the terminal region T of the second substrate G2 (a part of the terminal is indicated by a virtual line in the enlarged view of FIG. 1) is a region where the signal line is connected between the internal TFT and the external device. Therefore, it is necessary to expose to the outside at the final stage of division.

  On the other hand, an external seal 1 is provided on the outer peripheral edge of the mother substrate MG separately from the sealing material that encloses the liquid crystal between the two substrates G1 and G2. The external seal 1 is a seal for bonding the two substrates G1 and G2 so that the pieces generated when the mother substrate MG is divided are not scattered.

  When scribing such a mother substrate MG in the x direction, as shown in FIG. 1, it is necessary to expose the electrode terminals 2 formed on the lower TFT substrate G2. In FIG. 1, a solid line S1 is a scribe line by an upper cutter, and a broken line S2 is a scribe line by a lower cutter. Therefore, it is necessary to perform a scribe in which the positions of the scribe line S1 of the CF substrate G1 and the scribe line S2 of the TFT substrate G2 are slightly different from each other by the amount corresponding to the terminal. However, even when the scribe lines are shifted, it is necessary to scribe the upper and lower scribe lines S1 and S2 from the end of the mother substrate MG to the inner end of the outer seal 1 together. As shown in FIGS. 2A and 2B, when the upper and lower scribe lines S1, S2 are not aligned from the end of the mother substrate MG to the outer seal 1, the outer seal 1 has two substrates G1, G2. It will remain in between. Then, in the portion where the external seal 1 remains, the CF substrate G1 and the TFT substrate G2 remain bonded, and the terminal portion cannot be exposed. Therefore, as described above, it is necessary to scribe the upper and lower scribe lines S1 and S2 from the end of the mother substrate MG to the inner end of the outer seal 1, and then shift the upper and lower scribe lines S1 and S2. FIG. 2B is a view as seen from the direction of arrow A in FIG.

  Also, as shown in FIG. 3, the upper and lower scribe lines S4 and S5 when scribing in the y direction are cross sections of the finished product of the unit substrate P from the starting point of the scribe line, so as to suppress degradation of the quality of the split section. In addition, it is necessary to avoid undulations on the scribe line.

[Overall configuration of scribing device]
The scribing apparatus provided with the scribing head according to the present embodiment is an apparatus for forming scribe lines S1 to S4 in the above-described workpiece and dividing it into a plurality of unit substrates P. The overall configuration is shown in FIGS. This is shown in FIG. FIG. 4 is a plan view showing the outline of the entire apparatus, and FIG. 5 is a front view schematically showing a part of the apparatus.

  As shown in FIG. 4, the scribe device 10 mainly includes a first scribe unit 11, two second scribe units 12, and a substrate attitude changing device 13. Further, a transport mechanism (not shown) for transporting the substrate between these apparatuses is provided. A standby table 15 is provided on the upstream side in the transport direction of the first scribe unit 11. Also, posture change tables 16 and 17 are provided on the upstream side and the downstream side, respectively, in the transport direction of the substrate posture changing device 13. In this embodiment, two rows of processing lines are arranged on the downstream side in the transport direction of the substrate attitude changing device 13, but one row of processing lines may be arranged. In the case of one row of processing lines, one second scribe unit 12 is provided.

  The first scribe unit 11 forms a scribe line in the x direction with respect to the mother substrate MG that has been carried in. Further, the second scribe unit 12 forms a scribe line in the y direction with respect to the substrate on which the scribe and cut processes in the x direction are performed.

  As shown in FIG. 5, each scribe unit 11, 12 is provided with a pair of scribe heads SH that are opposed to each other with the substrate interposed therebetween (FIG. 5 shows only the cutter wheel constituting the scribe head). . The details of the scribe head SH will be described later. In this apparatus, the scribe lines are simultaneously formed on the upper and lower substrates by the upper and lower scribe heads SH, whereby the substrate can be divided without performing a break process as a separate process. FIG. 5A schematically shows the scribing process, and FIG. 5B shows the substrate after division. Such an apparatus configuration eliminates the reversal process for forming the scribe lines on the front and back surfaces of the substrate and the break process after the scribe lines are formed.

[Scribe head]
In the present apparatus, each of the first and second scribe units 11 and 12 is provided with two scribe heads. As will be described later, the structure of each scribe head is the same except for whether the holder to which the cutter wheel is attached rotates freely or the rotation of the holder is restricted. Hereinafter, the basic configuration of the scribe head will be described with reference to FIGS.

  The scribe head 20 is used to form the scribe lines S1 to S4 on the mother substrate MG, and is movable in the horizontal direction along guide bars 11a and 12a (see FIG. 4) provided in the scribe device 10. The scribe head 20 includes a base member 21 in which a mechanism (not shown) such as a swing motor assembly and a ball screw is disposed, a pressing motor 22 mounted on the upper portion of the base member 21, a holder holding member 23, And a kingpin assembly 25 having a holder 24.

<Holder holding member>
As shown in FIG. 7, the holder holding member 23 includes a cylindrical member 28, a collar 29 inserted into the inner surface of the cylindrical member 28, and a head cover 30. The cylindrical member 28 is supported below the head member 21. The head cover 30 has a through hole at the center and is fixed to the lower end of the cylindrical member 28.

<Holder>
As shown in FIGS. 7 and 8, the holder 24 is provided as one of the constituent members of the kingpin assembly 25. That is, the kingpin assembly 25 includes a holder 24, upper and lower bearings 32 and 33, a spacer 34, a bearing cover 35, and a support member 36.

  The holder 24 has a rod portion 24a extending in the vertical direction and a cutter holding portion 24b provided at the tip of the rod portion 24a. A coupling 40 is mounted via a bolt 41 on the upper end of the rod portion 24a. The coupling 40 can be connected to a turning motor assembly provided inside the head portion 21, and can rotate the holder 24 within a predetermined angular range. As shown in FIG. 7, the cutter holding portion 24 b has a triangular tip at one side view. Further, as shown in FIG. 8, a notch 24c having a predetermined length is formed from below at the tip of the cutter holding portion 24b. A cutter wheel 42 is attached to the lower end of the cut 24c.

  As shown in FIG. 7, when viewed from the direction orthogonal to the moving direction of the scribe head, the attachment center C1 of the cutter wheel 42 and the center C2 of the rod portion 24a of the holder 24 are offset by a distance δ. When the moving direction of the scribe head 20 is changed by the offset δ, the holder 24 is rotated following the change. As shown in FIG. 8, when viewed from the direction along the moving direction of the scribe head 20, the center of the cutter wheel 42 coincides with the center of the rod portion 24 a of the holder 24.

  The upper and lower bearings 32 and 33 rotatably support the holder 24 with respect to the holder support member 23. The spacer 34 is provided between the upper and lower bearings 32 and 33, and the upper end is in contact with the inner ring of the upper bearing 32 and the lower end is in contact with the inner ring of the lower bearing 33.

  The bearing cover 35 is a substantially cylindrical member, and has a fixed portion 35a and a dust seal portion 35b. The fixed portion 35a is fixed to the lower end portion of the rod portion 24a so as not to be relatively rotatable. Further, a rotation restricting hole 35c penetrating in the radial direction is formed in a substantially intermediate portion in the vertical direction of the fixed portion 35a. The dust seal portion 35b has an annular lip portion that extends radially outward from the lower end portion of the fixed portion 35a and protrudes upward.

  The support member 36 is a cylindrical member disposed on the outer periphery of the bearing cover 35. The outer peripheral surface of the support member 36 is press-fitted into the inner peripheral surface of the head cover 30 of the holder holding member 23. The head cover 30 is provided with a pin 43 that penetrates the head cover 30 in the radial direction. The tip of the pin 43 is pressed by an annular groove 36 a formed on the outer peripheral surface of the support member 36 by a screw member 44. This prevents the support member 36 from falling from the head cover 30. Further, a gap is provided between the inner peripheral surface of the support member 36 and the outer peripheral surface of the bearing cover 35.

  A screw hole penetrating in the radial direction is formed at a position corresponding to the hole 35c of the bearing cover 35 at a substantially middle portion of the support member 36 in the vertical direction. A screw member 45 is attached to the screw hole. The tip of the screw member 45 extends into the hole 35 c of the bearing cover 35. The inner diameter of the hole 35c is larger than the outer diameter of the screw member 45, and the bearing cover 35 and the holder 24 can rotate with respect to the support member 36 by an angle corresponding to the difference between these diameters.

  An annular groove is formed on the lower end surface of the support member 36. The lip portion of the bearing cover 35 is inserted into the annular groove. With such a configuration, it is possible to prevent a workpiece generated by machining from entering the bearings 32 and 33.

<Rotation regulation of holder>
As is apparent from the above description, the screw member 45 is attached to the support member 36 and the tip of the screw member 45 is inserted into the rotation restricting hole 35c of the bearing cover 35, whereby the bearing cover 35 is attached to the support member 36. Rotation can be regulated. That is, the rotation around the axis perpendicular to the workpiece surface of the holder 24 relative to the holder holding member 23 can be restricted. As described above, since the inner diameter of the hole 35c is formed larger than the outer diameter of the screw member 45 and a gap is formed between them, an angle corresponding to the gap (preferably 5 ° or less). Only the holder 24 can rotate relative to the support member 36. The scribe head set in this way is hereinafter referred to as a “fixed head”.

  On the other hand, by removing the screw member 45 from the support member 36, the bearing cover 35 can freely rotate with respect to the support member 36. That is, with respect to the holder holding member 23, the holder 24 can freely rotate around an axis perpendicular to the workpiece surface. The scribe head set in this way is hereinafter referred to as a “rotating head”.

[Machining operation]
Here, a processing operation in the case of dividing the mother substrate for manufacturing the liquid crystal display panel shown in FIGS. 1 to 3 will be described. In this case, a fixed head is set as a scribe head above the first scribe unit 11, and a rotary head is set as a scribe head below. Also, fixed heads are set as upper and lower scribe heads of the second scribe unit 12.

  First, the mother substrate MG is carried into the standby table 15 by the transport mechanism. The loaded mother board MG is transferred to a table on which the first scribe unit 11 is provided. Here, the mother substrate MG is scribed in the x direction. Specifically, as shown in FIG. 1, the scribe line S1 is formed by the upper fixed head, and the scribe line S2 is formed by the lower rotary head. As a result, the electrode terminal 2 formed on the lower TFT substrate G2 is exposed. Here, since the scribe lines S1 and S2 are simultaneously formed by the upper and lower scribe heads, the mother substrate MG is divided along the scribe lines S1 and S2 in the x direction without performing a break process.

  In the above processing, the direction of the lower rotary head is changed during movement as indicated by the broken line S2 in FIG. 1, but the holder 24 rotates freely with respect to the holder holding member 23. Follow the scribe line S2 while smoothly rotating. Moreover, since the rotation of the holder 24 with respect to the holder holding member 23 is restricted in the upper fixed head, the swell of the formed scribe line S1 is suppressed. For this reason, deterioration of the cutting quality of the product can be suppressed.

  The substrate that has been divided in the x direction by the first scribe unit 11 is transported to the substrate posture changing device 13. In the substrate attitude changing device 13, the attitude of the substrate is rotated by 90 degrees in the horizontal plane, and the substrate attitude changing device 13 is conveyed to a table provided with the second scribe unit 12.

  Next, the second scribing unit 12 performs scribing in the y direction. Thereby, the mother substrate MG is divided into each unit substrate P. Here, as described above, the scribe lines S3 and S4 are simultaneously formed by the upper and lower scribe heads, and are divided into unit substrates P without providing a break process.

  In the second scribe unit 12, upper and lower scribe lines S3 and S4 are formed by upper and lower fixed heads, respectively. Here, the cross section of the finished product of the unit substrate P starts from the starting point of the scribe lines S3 and S4. However, since the scribe lines S3 and S4 are formed by a fixed head, the occurrence of undulation in the scribe lines S3 and S4 is suppressed. be able to.

[Feature]
(1) If the screw member 45 is attached, the rotation of the holder 24 with respect to the holder holding member 24 can be restricted, and if the screw member 45 is removed, the holder 24 can be freely rotated with respect to the holder holding member 24. Can do. Thus, by attaching and detaching the screw member 45 to one scribe head, two types of scribe heads can be easily configured.

  (2) In a processing stage where the moving direction of the scribe head needs to be changed, a rotary head that can freely rotate the holder is set. Further, there is no need to change the moving direction of the scribe head, and a fixed head in which the rotation of the holder is restricted is set particularly when the scribe line is directly in the cross section of the product. For this reason, it can process with a suitable scribe head according to the kind of scribe line.

[Other Embodiments]
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

  In the above embodiment, the present invention is applied to the case where the mother substrate for a liquid crystal display panel is divided. However, the present invention can also be applied to the case where scribe lines are formed on another brittle material substrate.

  The configuration for restricting the rotation of the holder with respect to the holder holding member is not limited to the above embodiment. In the embodiment, the screw member is inserted into the through-hole, but a pin may be used instead of the screw member.

DESCRIPTION OF SYMBOLS 10 Scribe device 20 Scribe head 21 Base member 23 Holder holding member 24 Holder 25 Kingpin assembly 32, 33 Bearing 35 Bearing cover (rotating member)
35c Rotation restricting hole 36 Support member 42 Cutter wheel 45 Screw member

Claims (5)

A scribing head mounted on a scribing device for forming a scribing line on a brittle material substrate as a work,
A base member;
A holder holding member attached to the base member;
A holder to which a cutter can be attached at the tip and held by the holder holding member;
The holding state of the holder with respect to the holder holding member is selectively selected so that the holder can rotate around a rotation axis perpendicular to the workpiece surface or the rotation of the holder around the rotation axis is restricted. A holder rotation control mechanism for switching,
Scribe head with The holder rotation control mechanism is
An opening formed radially inward on the outer peripheral surface of the holder;
An engagement member that is detachably mounted on the holder holding member and is partially inserted into the opening of the holder;
The scribe head according to claim 1, comprising:   The scribe head according to claim 2, wherein the holder rotation control mechanism restricts the rotation angle of the holder to 5 ° or less when restricting rotation of the holder around the rotation axis. A kingpin assembly including the holder;
The kingpin assembly is
A holder having a rod portion extending along the rotation axis and a cutter holding portion to which a cutter is attached at the tip;
A pair of bearings rotatably supporting the holder with respect to the holder holding member;
A rotating member fixed to the rod portion of the holder and rotating together with the holder;
A support member that is arranged with a gap around the outer periphery of the rotating member and is fixed to the holder support member;
Have
The opening is formed in the rotating member;
The engagement member is provided on the support member;
The scribe head according to claim 2 or 3.   The scribe head according to any one of claims 1 to 4, wherein a rotation center of the holder is offset from a cutter mounting center of the holder.

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