JP7098174B2 - Scribe head - Google Patents

Description

The present invention relates to a scribe head for forming a scribe line on a substrate.

The dividing step for dividing a brittle material substrate such as a glass substrate includes a scribe step for forming a scribe line on the surface of the substrate and a break step for dividing the substrate along the formed scribe line. In the scribe process, a scribe device equipped with a scribe head is used.

The scribe head disclosed in Patent Document 1 below includes a base plate, a top plate and a bottom plate mounted perpendicular to the base plate, a tip holder for holding the scribing wheel, and an elevating mechanism for raising and lowering the tip holder. , Equipped with. The elevating mechanism includes a servomotor, a coupling, a ball screw, a slide block, and a linear way. The elevating mechanism is provided between the top plate and the bottom plate.

A ball screw screw shaft is attached to the motor shaft of the servo motor via a coupling, and a slide block is mounted on the base plate between the top plate and the bottom plate so as to be movable in the vertical direction via a linear way. There is. Since the nut of the ball screw is attached to the slide block, when the servomotor rotates, the screw shaft of the ball screw rotates and the nut moves in the vertical direction. Therefore, the slide block to which the nut is attached can move in the vertical direction.

Below the slide block, a tip holder is provided so as to penetrate the bottom plate and face downward. Therefore, when the slide block moves in the vertical direction, the scribing wheel held by the chip holder abuts on the substrate and forms a scribe line on the substrate while applying a load (scribe load) to the substrate.

Japanese Unexamined Patent Publication No. 2012-025595

In the scribe head of Patent Document 1, a scribe line is formed on the substrate by the above configuration. However, when the scribe operation is performed by such a scribe head, the following problems occur.

Generally, it is difficult to place the board on the mounting table in a completely horizontal state. Therefore, as a result, a height difference may occur on the surface of the substrate, or a minute undulation (unevenness) may occur on the surface of the substrate itself.

In this case, for example, when the cutter wheel descends from the convex portion to the concave portion of the substrate, an inertial force acts on the cutter wheel, and the cutter wheel floats momentarily from the surface of the substrate. In this way, since the cutter wheel is separated from the surface of the substrate, a phenomenon called "load loss" occurs in which the load from the cutter wheel is not applied to the substrate.

On the other hand, when the cutter wheel rises from the concave portion to the convex portion, an inertial force acts on the cutter wheel, and the cutter wheel is in a state of sinking to the surface of the substrate. Therefore, a load larger than the load initially set for the substrate is applied to the substrate. In this way, the load fluctuates on the surface of the substrate.

When such load fluctuations occur, scribe lines cannot be formed satisfactorily, which may affect the quality of the substrate.

In view of these problems, it is an object of the present invention to provide a scribe head capable of suppressing fluctuations in the load of a cutter wheel on a substrate.

A first aspect of the present invention relates to a scribe head that forms a scribe line on the surface of a substrate. The scribing head according to this embodiment includes a cutter wheel for forming a scribing line on the surface of the substrate and a driving mechanism for bringing the cutter wheel into contact with the surface of the substrate, and the driving mechanism includes a servo motor. Includes a screw shaft that is rotated about an axis by the servomotor and a nut that is screwed into the screw shaft and causes the cutter wheel to approach and separate from the surface of the substrate by rotation of the screw shaft. The positive efficiency and the reverse efficiency of the screw shaft and the nut are the same.

According to the screen head according to this aspect, since the positive efficiency and the negative efficiency of the screw shaft and the nut are the same, the screw shaft has the same when the cutter wheel presses the substrate and when the reaction force from the substrate is received. The rotational driving force is equal. Therefore, the responsiveness of the cutter wheel is improved, and as a result, the followability of the cutter wheel to the surface of the substrate is improved. As a result, fluctuations in the scribe load with respect to the shape of the surface of the substrate are suppressed. Therefore, a predetermined scribe load can be maintained anywhere on the surface of the substrate.

In the scribe head according to this aspect, the screw shaft may be configured to have a lead angle of 45 °.

According to the scribe head according to this aspect, since the lead angle of the screw shaft is set to 45 °, the ratio of the positive efficiency to the reverse efficiency of the screw shaft and the nut is 1: 1. Therefore, the positive efficiency and the reverse efficiency can be set to be the same.

In the scribe head according to this aspect, the screw shaft and the nut may form a sliding screw.

According to the scribe head according to this aspect, a sliding screw is adopted as a means for making the positive efficiency and the negative efficiency of the screw shaft and nut the same. Sliding screws with a lead angle of 45 ° are general-purpose products and are easily available. Therefore, the drive mechanism can be easily configured.

The scribe head according to this aspect may be further configured to further include other drive mechanisms that bring the cutter wheel closer to and further from the substrate.

According to the scribe head according to this aspect, the driving force in the direction of separating the cutter wheel from the substrate is applied by another driving mechanism, and the difference in the driving force between the driving mechanism and the other driving mechanism causes the substrate. The load applied to the wheel can be finely adjusted within a low load range. Therefore, a scribe line can be satisfactorily formed on a substrate having a small thickness.

In the screen head according to the present embodiment, the other drive mechanism further includes a movement mechanism and a pressure applying unit that supplies air pressure to the movement mechanism, and the movement mechanism includes a first mover and the first movement. A second mover arranged at a position closer to the substrate than the child, a support portion for supporting the first mover and the second mover at predetermined intervals, the first mover, and the second mover. The movement of the first mover and the second mover, and the cylinder part that accommodates the child and the support portion and has an opening that communicates with the outside at a position between the first mover and the second mover. A transmission portion for transmitting the pressure to the cutter wheel, a gap is provided between the first mover and the second mover and the inner surface of the cylinder portion, and the pressure applying portion is the first mover. Air pressure is supplied to at least the second space of the first space opposite to the support portion for one mover and the second space opposite to the support portion to the second mover. Can be configured.

According to the scribe head according to this aspect, the difference between the load due to the driving force of the servomotor and the load due to the air pressure supplied to the second space by the pressure applying portion is set as the scribe load applied to the cutter wheel. Can be done. At this time, a part of the air supplied to the second space is discharged from the opening through the gap between the second mover and the inner side surface of the cylinder portion. As described above, when air passes through the gap, the second mover receives pressure in a direction away from the inner side surface of the tubular portion, and is centered at a position where the pressure is in equilibrium. Further, a part of the air supplied to the second space passes through the gap between the first mover and the inner side surface of the cylinder portion. As a result, the first mover is also aligned.

Therefore, the first mover and the second mover are supported at the centering position in a state of being separated from the inner side surface of the tubular portion. As described above, since the first mover and the second mover are supported in a non-contact state with respect to the inner surface of the tubular portion, they are not subjected to frictional resistance during movement. Therefore, a driving force can be stably applied to the cutter wheel by another driving mechanism.

Therefore, the scribing load of the cutter wheel can be finely and stably adjusted by the difference between the load due to the driving force of the servomotor and the load due to the air pressure supplied from the pressure applying portion to the second space.

In this way, since the scribe load of the cutter wheel can be finely and stably adjusted, the scribe load of the cutter wheel on the substrate is kept constant at any place on the surface of the substrate.

In the scribe head according to this embodiment, the first mover and the second mover may be formed to be a sphere, and the inner surface of the cylinder portion may be configured to have a cylindrical shape.

According to the scribe head according to this aspect, since the gap between the first mover and the second mover and the inner side surface of the cylinder portion is gently reduced, air can be smoothly circulated through these gaps. Further, in the internal space, since the gap can be made uniform over the entire circumference of the parallel of the maximum diameter, the alignment of the first mover and the second mover is smoothly performed, and the contact is not made over the entire circumference. Can be in the state of. Therefore, the first mover and the second mover can be smoothly moved in a non-contact state.

In the scribe head according to this aspect, the first mover and the second mover may be configured to have the same diameter, and the diameter of the inner surface of the cylinder portion may be constant.

According to this configuration, since the same type of sphere can be used for the first mover and the second mover, the configuration of the movement mechanism can be simplified and the assembly work of the movement mechanism becomes easy.

In the scribe head according to this embodiment, the first mover and the second mover are formed of a magnetic material, and the support portion is provided with both ends of the first mover and the second mover in the separation direction. It may be configured to include a magnet at the tangent end.

According to this configuration, the first mover and the second mover can move in the direction perpendicular to the support portion. Therefore, even if the support portion cannot move in the radial direction of the tubular portion, the first mover and the second mover move relative to the support portion due to the flow of air in the gap. Positioned at the centering position.

Further, the contact surface of the magnet with respect to each of the first mover and the second mover may be configured to be a flat surface.

According to this configuration, since the first mover and the second mover make point contact with the magnet, the first mover and the second mover can easily move with respect to the support portion. Therefore, the first mover and the second mover can be smoothly moved to the centering position by the pressure from the air flowing through the gap between the first mover and the second mover and the inner side surface of the cylinder portion.

In the scribe head according to this aspect, the transmission portion may be configured to be connected to the support portion via the opening.

According to the scribe head according to this aspect, since the opening formed in the cylinder portion is shared for the air discharge and the connection of the transmission portion to the support portion, the configuration of the cylinder portion can be simplified.

The scribe head according to this aspect may be further configured to include a measuring unit for measuring the load of the cutter wheel on the substrate.

According to the scribe head according to this aspect, since the measuring unit is provided, the load on the substrate of the cutter wheel can be measured immediately before forming the scribe line. Therefore, the reliability of the scribe load at the time of forming the scribe line can be increased.

As described above, according to the present invention, it is possible to provide a scribe head capable of suppressing fluctuations in the load of the cutter wheel on the substrate.

The effects or significance of the present invention will be further clarified by the description of the embodiments shown below. However, the embodiments shown below are merely examples for implementing the present invention, and the present invention is not limited to those described in the following embodiments.

FIG. 1 is a diagram schematically showing a configuration of a scribe device according to an embodiment. FIG. 2 is a perspective view showing the configuration of the scribe head according to the embodiment. 3 (a) to 3 (c) are diagrams for explaining the configuration of the cutter mechanism of the scribe head according to the embodiment. FIG. 3A is a perspective view showing the configuration of the cutter mechanism according to the embodiment. FIG. 3B is a cross-sectional view of a part of the cutter mechanism of the scribe head according to the embodiment when viewed from the positive side of the X-axis. FIG. 3C is a side view of a part of the cutter mechanism of the scribe head according to the embodiment when viewed from the positive side of the Y axis. FIG. 4A is an exploded perspective view showing the configuration of the drive mechanism of the scribe head according to the embodiment. FIG. 4B is a perspective view showing the configuration of the drive mechanism of the scribe head according to the embodiment. FIG. 5 is an exploded perspective view showing the configuration of the moving mechanism of the scribe head according to the embodiment. 6 (a) and 6 (b) are diagrams for explaining the configuration of the moving mechanism of the scribe head according to the embodiment. FIG. 6A is an exploded perspective view of a member housed in the cylinder portion of the scribe head according to the embodiment. FIG. 6B is a perspective view of the transmission unit of the moving mechanism according to the embodiment when viewed from a direction different from that in FIG. 7 (a) and 7 (b) are diagrams for explaining the configuration of the moving mechanism of the scribe head according to the embodiment. FIG. 7A is a cross-sectional view of the moving mechanism of the scribe head according to the embodiment when viewed from the negative side of the Y-axis. FIG. 7B is a top view of the moving mechanism of the scribe head according to the embodiment. FIG. 8 is a perspective view showing the configuration of the moving mechanism of the scribe head according to the embodiment. FIG. 9 is a perspective view showing the configuration of the scribe head according to the embodiment. FIG. 10A is a schematic view of a screw shaft and a nut provided on the scribe head according to the embodiment. FIG. 10B is a schematic view of a screw shaft and a nut provided in a conventional scribe head. 11 (a) and 11 (b) are diagrams for explaining the moving mechanism of the scribe head according to the embodiment. FIG. 11A is a cross-sectional view of the moving mechanism according to the embodiment when viewed from the negative side of the X-axis. 11 (b) is an enlarged schematic view of a part of FIG. 11 (a). FIG. 12 is a block diagram showing a configuration of a scribe head according to an embodiment. FIG. 13 is a side view of the scribe head according to the embodiment. 14 (a) and 14 (b) are front views for explaining the operation of the moving mechanism and the measuring unit of the scribe head according to the embodiment, respectively.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. For convenience, the X-axis, Y-axis, and Z-axis that are orthogonal to each other are added to each figure. The Z axis is parallel to the vertical direction. The upper and lower parts correspond to the Z-axis positive direction and the Z-axis negative direction, respectively.

Further, in the present embodiment, the substrate F is placed parallel to the XY plane, and the scribe head operates so that the cutter wheel 101 approaches and separates from the surface F1 of the substrate F. In the following description, the direction in which the substrate F approaches the surface F1 may be simply referred to as "downward", and the direction in which the substrate F is separated from the surface F1 may be referred to simply as "upward". Therefore, in the present embodiment, moving each configuration of the scribe head in the vertical direction is synonymous with approaching and separating from the surface F1 of the substrate F.

<Embodiment>
FIG. 1 is a diagram schematically showing the configuration of the scribe device 1.

As shown in FIG. 1, the scribe device 1 includes a moving table 2 and a scribe head 10. The moving table 2 is screwed with the ball screw 3. The moving table 2 is supported by a pair of guide rails 4 so as to be movable in the Y-axis direction. When the ball screw 3 is rotated by the drive of the motor 5, the moving table 2 moves in the Y-axis direction along the pair of guide rails 4.

A motor 5 is installed on the upper surface of the moving table 2. The motor 5 rotates the mounting portion 6 located at the upper part in the XY plane and positions it at a predetermined angle. The mounting portion 6 that can be horizontally rotated by the motor 5 includes a vacuum suction means (not shown). The substrate F mounted on the mounting portion 6 is held on the mounting portion 6 by this vacuum suction means.

In the scribe device 1, a bridge 7 is erected on columns 8a and 8b so as to straddle the moving table 2 and the mounting portion 6 above the moving table 2. A rail 9 is attached to the bridge 7. The rail 9 and the scribe head 10 are connected via a transfer unit 11, and the transfer unit 11 slides and moves the rail 9, so that the scribe head 10 is installed so as to move in the X-axis direction.

When forming a scribe line on the surface F1 of the substrate F by using the scribe device 1, first, the holder unit 110 to which the cutter wheel 101 is attached is attached to the scribe head 10.

The scribe device 1 moves the scribe head 10 to a predetermined position and applies a predetermined load to the cutter wheel 101 to bring it into contact with the surface F1 of the substrate F. After that, the scribe device 1 forms a scribe line on the substrate F by moving the scribe head 10 in the X-axis direction.

The scribe device 1 can rotate or move the mounting portion 6 in the Y-axis direction as needed. In the above, the scribe device 1 that rotates while the scribe head 10 moves in the X-axis direction and the mounting portion 6 moves in the Y-axis direction is shown. However, the scribe device 1 includes the scribe head 10 and the mounting portion 6. Anything that moves relatively is sufficient. For example, the scribe head 10 may be fixed, and the mounting portion 6 may be a scribe device 1 that moves and rotates in the X-axis and Y-axis directions.

Next, the configuration of the scribe head 10 will be described.

FIG. 2 is a perspective view showing the configuration of the scribe head 10.

As shown in FIG. 2, the scribe head 10 includes a plate 12, a mounting plate 13, a stopper 14, a cutter mechanism 100, a moving mechanism 200, an image pickup unit 400, and a drive mechanism 600. In addition, the scribe head 10 includes a measuring unit 300 (see FIG. 9) and a pressure applying unit 500 (FIG. 12) for applying pressure to the tube 502.

The plate 12 supports the scribe head 10. The scribe head 10 is attached to the transfer unit 11 (see FIG. 1) of the scribe device 1 in a state of being supported by the plate 12.

The cutter mechanism 100 holds a cutter wheel 101 (see FIGS. 3A to 3C) that forms a scribe line on the surface F1 of the substrate F. The moving mechanism 200 brings the cutter wheel 101 closer to and further from the surface F1 of the substrate F. The measuring unit 300 (see FIG. 9) measures the load (scribe load) of the cutter wheel 101 with respect to the substrate F. The image pickup unit 400 is used to align the substrate F with the mounting unit 6. Hereinafter, each configuration will be described.

FIG. 3A is a perspective view showing the configuration of the cutter mechanism 100.

As shown in FIG. 3A, the cutter mechanism 100 includes a holder unit 110, a joint 120, a receiving portion 130, a block member 140, and a cover 150. The cutter wheel 101 is held by the holder unit 110.

FIG. 3B is a cross-sectional view of the holder unit 110 and the joint 120 when cut in a plane parallel to the YY plane and viewed from the positive side of the X-axis. Note that FIG. 3B shows only the portion where the holder unit 110 is mounted on the joint 120. Further, the portion of the holder unit 110 that protrudes from the joint 120 is shown in the side view. FIG. 3C is a side view of the holder unit 110 protruding from the joint 120 when the cross section is cut in a plane parallel to the XX plane and viewed from the positive side of the Y axis. be.

As shown in FIGS. 3B and 3C, the holder unit 110 includes the cutter wheel 101, the holder 111, and the pin shaft 112 described above.

In the holder 111, the upper portion 111a on which the inclined surface 111c is formed is mounted on the joint 120. Side walls 113a and 113b for holding the cutter wheel 101 are formed on the lower portion 111b of the holder 111 so as to face each other in the X-axis direction. The side walls 113a and 113b are formed in a trapezoidal shape whose width narrows toward the lower end when viewed from the X-axis direction. A groove 114 is formed between the side walls 113a and 113b.

At the lower ends of the side walls 113a and 113b, circular holes 115a and 115b are formed coaxially so as to straddle the groove 114. The central axes of the holes 115a and 115b are parallel to the X axis. The cutter wheel 101 is inserted into the groove 114 so that the holes 115a and 115b and the holes 101a of the cutter wheel 101 are aligned on the same straight line. Then, a pin shaft 112 having a diameter smaller than that of the holes 101a and 115a and 115b is passed through the holes 115a and 115b and the holes 101a of the cutter wheel 101. Both ends of the pin shaft 112 are locked by the side walls 113a and 113b, respectively. In this way, the cutter wheel 101 is rotatably held by the holder unit 110.

In FIG. 3C, the pin shaft 112 is shown by a chain line, and the holes 115a and 115b are shown by broken lines.

The holder 111 is integrally formed with an upper portion 111a and a lower portion 111b. Alternatively, the upper portion 111a and the lower portion 111b may be separate bodies.

As shown in FIGS. 3 (b) and 3 (c), a circular hole 121 that opens upward (on the positive side of the Z axis) is formed on the lower surface of the joint 120. A magnet 122 is installed in the innermost portion 121a of the hole 121. Further, inside the hole 121, a positioning pin 123 is provided in a direction perpendicular to the central axis G1 of the hole 121. The holder unit 110 is attached to the joint 120 by inserting the upper portion 111a of the holder 111 into the hole 121.

At least the upper portion 111a of the holder 111 is formed of a magnetic material. Therefore, when the upper portion 111a is inserted into the hole 121, the upper portion 111a is attracted to the magnet 122, and the inclined surface 111c of the upper portion 111a abuts on the pin 123.

Further, a bolt 124 is fitted below the joint 120 on the opposite side of the central axis G1 from the positioning pin 123 toward the upper portion 111a of the holder 111. As a result, the inclined surface 111c of the holder 111 appropriately abuts on the positioning pin 123.

As shown in FIG. 3A, the receiving portion 130 is a cylindrical member, and a hole 131 is formed on the lower surface thereof. The joint 120 is fitted in the hole 131. A block member 140 is provided above the receiving portion 130 via the connecting member 141.

The cover 150 is an L-shaped member and is attached to the block member 140. A hole (not shown) is formed in the upper surface 151 of the cover 150, and a nut 632 of the drive mechanism 600 described later is mounted in this hole (see FIG. 2). A stopper 14 is also provided on the upper surface 151. The stopper 14 will be described later with reference to FIG. Further, the moving mechanism 200 is connected to the side surface of the cover 150 on the negative side of the X-axis (see FIG. 2).

FIG. 4A is an exploded perspective view for explaining the configuration of the drive mechanism 600.

As shown in FIG. 4A, the drive mechanism 600 includes a servomotor 610, a coupling 620, and a sliding screw 630. The sliding screw 630 is composed of a screw shaft 631 and a nut 632. The nut 632 is composed of a shaft portion 633 and a flange portion 634.

A bearing 611 is mounted on the lower surface 610a of the servomotor 610. The servomotor 610 is provided with a shaft 612 so as to penetrate the hole 611a of the bearing 611. The shaft 612 is a rotation shaft of the servomotor 610.

The screw shaft 631 is fitted to the nut 632. The screw shaft 631 and the shaft 612 are fixed to the coupling 620, respectively. When assembled in this way, the drive mechanism 600 as shown in FIG. 4 (b) is configured.

A mounting plate 13 is provided between the bearing 611 and the coupling 620 (see FIG. 2).

FIG. 5 is an exploded perspective view for explaining the configuration of the moving mechanism 200.

As shown in FIG. 5, the moving mechanism 200 includes a tubular portion 210, a first moving element 220, a second moving element 221, a supporting portion 222, magnets 223 and 224, and a transmitting portion 230. There is.

The tubular portion 210 has a shape in which a protrusion 211 is integrally provided on the side surface 210a on the negative side of the X-axis of a rectangular box body along the Z-axis direction. The tubular portion 210 is formed with an internal space 212 for accommodating the first mover 220 and the second mover 221 from the upper surface to the lower surface. The shape of the inner side surface 212a of the tubular portion 210 forming the internal space 212 is a cylindrical shape, and the diameter of the inner side surface 212a of the tubular portion 210 is constant along the Z-axis direction. Further, a lid 213 is provided at each of the openings on the upper surface and the lower surface of the tubular portion 210.

A track-shaped opening 214 is formed in the central portion of the side surface 211a on the positive side of the X-axis of the protrusion 211. The opening 214 is formed so as to communicate with the internal space 212. As a result, the internal space 212 communicates with the outside of the tubular portion 210 through the opening 214.

Holes 210c and 210d communicating with the internal space 212 are formed on the side surface 210b on the negative side of the Y-axis of the tubular portion 210 (see FIG. 8). Pipes 501 and 502 are attached to the holes 210c and 210d. In the present embodiment, the air pressure supplied from the pressure applying portion 500 (see FIG. 12), which will be described later, is supplied from the pipe 502 to the internal space 212 of the tubular portion 210. No air pressure is supplied to the pipe 501 from the pressure applying portion 500, and the atmospheric pressure is released.

FIG. 6A is an exploded perspective view showing the configuration of each member housed in the internal space 212 of the tubular portion 210. FIG. 6B is a perspective view of the transmission unit 230 when the transmission unit 230 shown in FIG. 5 is viewed from the negative side of the X-axis.

As shown in FIGS. 5 and 6A, the first mover 220 and the second mover 221 are spheres formed of a magnetic material and are formed to have the same diameter. The diameters of the first mover 220 and the second mover 221 are slightly smaller than the diameter of the inner side surface 212a of the tubular portion 210.

The support portion 222 supports the first mover 220 and the second mover 221 by separating them by a predetermined distance. The support portion 222 is a cylindrical member, and a hole 225 penetrating in the X-axis direction is formed in the central portion in the Z-axis direction. In the present embodiment, the support portion 222 is formed to be smaller than the diameter of the first mover 220 and the second mover 221. The diameter of the support portion 222 may be the same as or larger than the diameter of the first mover 220 and the second mover 221 as long as the diameter of the support portion 222 is smaller than the diameter of the inner side surface 212a of the tubular portion 210.

Circular recesses 222a and 222b communicating with the hole 225 are formed at both ends of the support portion 222. The recesses 222a and 222b are formed with screw holes 222c and 222d (see FIG. 7A) that communicate with the holes 225, and the magnets 223 and 224 are fitted into the recesses 222a and 222b.

Further, when a pin 232 (see FIG. 6B) described later is inserted into the hole 225 of the support portion 222, a screw 226 is used to fix the pin 232 in the hole 225. The screw 226 is inserted into the screw hole 222d (see FIG. 7A) and screwed.

The magnets 223 and 224 have a cylindrical shape, and the first mover 220 and the second mover 221 are in contact with each of the magnets 223 and 224, respectively. The first mover 220 comes into contact with the upper surface 223a of the magnet 223. The second mover 221 comes into contact with the lower surface 224a of the magnet 224. The upper surface 223a and the lower surface 224a are formed on a plane parallel to the XY plane. Further, the magnets 223 and 224 have the same size.

As shown in FIGS. 5 and 6B, the transmission portion 230 has a groove 231 extending in the Z-axis direction formed on the side surface on the negative side of the X-axis. The width and depth of the groove 231 are constant. The width of the groove 231 is slightly larger than the width of the protrusion 211 in FIG. A pin 232 is provided at the center of the bottom surface 231a of the groove 231. The pin 232 is inserted into the hole 225 formed in the support portion 222. Therefore, the pin 232 is formed so as to be the same as or slightly smaller than the diameter of the hole 225.

The transmission portion 230 is formed so that the side walls 233 and 234 face each other in the Y-axis direction with the groove 231 interposed therebetween. The length of the groove 231 in the Y-axis direction is the same as the length of the protrusion 211 of the tubular portion 210 in the Y-axis direction (see FIGS. 7 (b) and 8).

Next, the assembly of the moving mechanism 200 will be described.

FIG. 7A is a cross-sectional view when the moving mechanism 200 and the plate 12 are cut in a plane parallel to the XX plane and viewed from the positive side of the Y-axis.

As shown in FIG. 7A, the support portion 222 is housed in the internal space 212 of the tubular portion 210. At this time, the support portion 222 is housed in the internal space 212 so that the hole 225 of the support portion 222 can be visually recognized from the opening 214 of the tubular portion 210. Further, the support portion 222 is housed in the internal space 212 so that the central axis of the support portion 222 coincides with the central axis of the internal space 212.

The pin 232 of the transmission unit 230 is inserted into the hole 225 of the support unit 222 thus arranged. At this time, the end of the pin 232 on the negative side of the X-axis is inserted so as not to protrude from the negative side of the X-axis of the hole 225. Thus, when the pin 232 is inserted into the hole 225, the screw 226 is inserted into the screw hole 222d of the support portion 222, and the pin 232 is pressed upward in the hole 225 by the screw 226. As a result, the pin 232 is fixed to the support portion 222. Therefore, the transmission portion 230 and the support portion 222 are connected via the pin 232.

When the pin 232 is fixed in the hole 225 of the support portion 222 in this way, the end of the pin 232 on the negative X-axis side does not protrude from the negative side of the X-axis of the hole 225, so that the pin 232 is the tubular portion 210. Does not contact the inner surface 212a.

When the support portion 222 is housed in the internal space 212, the magnet 223 is fitted into the recess 222a of the support portion 222 so that the upper surface 223a of the magnet 223 is exposed from the recess 222a. Similarly, the magnet 224 is fitted into the recess 222b of the support portion 222 so that the lower surface 224a of the magnet 224 is exposed from the recess 222b.

When the magnets 223 and 224 are installed in the support portion 222, the first mover 220 is housed in the internal space 212. Since the first mover 220 is made of a magnetic material, it is attracted to the magnet 223 and is supported by the support portion 222 via the magnet 223. At this time, the first mover 220 does not separate from the magnet 223 in the Z-axis direction. The second mover 221 is also supported by the support portion 222 via the magnet 224 in the same manner.

As described above, when the first mover 220, the second mover 221, the support portion 222, and the magnets 223 and 224 are housed in the internal space 212 of the tubular portion 210, the first mover 220 and the second mover A gap is formed between the entire circumference of the child 221 and the internal space 212, and a gap is formed between the entire circumference of the support portion 222 and the internal space 212.

7 (b) is a top view of the moving mechanism 200 of FIG. 7 (a) when viewed from the positive side of the Z axis.

As described above, the pin 232 inserted into the hole 225 of the support portion 222 is pressed by the screw 226 inserted into the screw hole 222d of the support portion 222 so as not to protrude from the hole 225 (FIG. 7A). reference). Therefore, as shown in FIG. 7B, when the groove 231 of the transmission portion 230 fits into the protrusion 211 of the cylinder portion 210, a gap is created between the side surface 211a of the cylinder portion 210 and the bottom surface 231a of the groove 231. Occurs. Therefore, a gap is also formed between the side wall 233 and 234 of the transmission portion 230 and the side surface 210a of the cylinder portion 210. The arrow in FIG. 7B points to a place where a gap is formed.

In this way, after the first mover 220, the second mover 221 and the support part 222, and the magnets 223 and 224 are housed in the internal space 212 of the tubular portion 210, the two lids 213 shown in FIG. 5 have the internal space. Attached to the openings on the upper and lower surfaces of the 212, the upper and lower surfaces of the internal space 212 are closed. As a result, as shown in FIG. 8, the assembly of the moving mechanism 200 is completed.

When the moving mechanism 200 is assembled in this way, the side surface on the negative side of the X-axis of the tubular portion 210 is attached to the plate 12. As a result, the moving mechanism 200 is fixed to the plate 12 (see FIG. 2).

In FIG. 7A, the screw 226 is inserted into the screw hole 222d of the support portion 222, and the pin 232 is pressed from below by the screw 226, but the screw 226 may be inserted into the screw hole 222c. .. In this case, the pin 232 is pressed against the screw 226 from above. Alternatively, a screw 226 may be inserted into each of the screw holes 222c and 222d, and the pin 232 may be pressed from above and below to be fixed in the hole 225 of the support portion 222.

FIG. 9 is a perspective view showing the configuration of the scribe head 10. However, for convenience of explanation, the cutter mechanism 100, the image pickup unit 400, and the drive mechanism 600 are omitted in FIG.

As shown in FIG. 9, the measuring unit 300 includes a load cell 310, an abutting member 320, and a base 330.

The load cell 310 measures the scribe load applied to the substrate F by the cutter wheel 101 when the cutter wheel 101 comes into contact with the surface F1 of the substrate F. A protrusion 311 is provided on the upper surface of the load cell 310.

The contact member 320 is a block member that contacts the protrusion 311 of the load cell 310. Further, the contact member 320 is provided with a nut 321 on the lower surface thereof. The table 330 is a table on which the load cell 310 is placed and is fixed to the plate 12.

Note that FIG. 9 shows a state in which the nut 321 of the contact member 320 is in contact with the protrusion 311 of the load cell 310. The operation of the measuring unit 300 will be described later with reference to FIGS. 13 and 14 (b).

Returning to FIG. 2, the imaging unit 400 is mounted on the plate 12. The image pickup unit 400 is used when positioning the substrate F in the mounting portion 6. From the image captured by the imaging unit 400, the user can grasp whether the substrate F is properly positioned on the mounting unit 6.

The cutter mechanism 100, the moving mechanism 200, the measuring unit 300, and the driving mechanism 600 described above are connected as follows.

As shown in FIGS. 5 and 9, the side surface of the cover 150 of the cutter mechanism 100 on the negative side of the X axis (see FIGS. 2 and 3A) is in contact with the side surface of the transmission unit 230 on the positive side of the X axis. , The transmission unit 230 and the cover 150 are fixed by bolts (not shown). As a result, as shown in FIG. 1, the cutter mechanism 100 and the moving mechanism 200 are connected.

Further, as shown in FIG. 9, the side surface of the contact member 320 on the negative side of the Y axis is abutted against the side surface of the transmission unit 230 on the positive side of the Y axis, and is formed on the side surface of the contact member 320 on the positive side of the Y axis. A bolt (not shown) is inserted through the hole to connect the transmission portion 230 and the contact member 320. Thus, as shown in FIG. 2, the cutter mechanism 100 and the contact member 320 are connected to the transmission unit 230 of the moving mechanism 200.

To connect the cutter mechanism 100 and the drive mechanism 600, first, as shown in FIG. 2, the servomotor 610 and the mounting plate 13 are connected. The mounting plate 13 is an L-shaped plate member, and a hole (not shown) is formed in the upper wall 13a parallel to the XY plane in the Z-axis direction. The bearing 611 (see FIGS. 4A and 4B) mounted on the lower surface 610a of the servomotor 610 is fitted into this hole, and the upper wall 13a and the lower surface 610a are screwed with screws (not shown). Be fastened.

Next, the shaft portion 633 is fitted into the hole (not shown) formed in the upper surface 151 of the cover 150 of the cutter mechanism 100 so that the flange portion 634 of the nut 632 is in close contact with the hole (FIGS. 4A and 4B). reference). At this time, the screw shaft 631 is in a state of being meshed with the nut 632.

Then, the servomotor 610 connected to the mounting plate 13 and the screw shaft 631 are connected via the coupling 620 (see FIGS. 4A and 4B). Finally, the side wall 13b extending from the edge of the upper wall 13a of the mounting plate 13 to the negative side of the Z axis is screwed to the plate 12 with a screw (not shown). In this way, the drive mechanism 600 is fixed to the plate 12 in a state of being mounted on the cutter mechanism 100 via the mounting plate 13.

When the servomotor 610 is driven, the shaft 612 is rotationally driven. The rotational driving force of the shaft 612 is transmitted to the screw shaft 631 via the coupling 620. As a result, the screw shaft 631 rotates, and the rotation of the screw shaft 631 causes the nut 632 to move in the vertical direction. Since the nut 632 is connected to the cover 150 of the cutter mechanism 100, when the nut 632 moves in the vertical direction, the cutter mechanism 100 also moves in the vertical direction. As a result, the cutter wheel 101 can be brought closer to and further from the surface F1 of the substrate F.

The drive mechanism 600 has a major feature in the configuration of the sliding screw 630 (screw shaft 631 and nut 632). The present inventor has found that by providing the scribe head 10 with a sliding screw 630, the scribe load of the cutter wheel 101 with respect to the substrate F is kept constant at any place on the surface F1 of the substrate F.

Hereinafter, the configuration of the sliding screw 630 and the scribe load of the cutter wheel 101 on the substrate F will be described with reference to FIGS. 10A and 10B.

FIG. 10A is a diagram schematically showing the sliding screw 630. FIG. 10B is a diagram schematically showing a ball screw 700 applied to a conventional scribe head (comparative example).

As shown in FIG. 10A, the sliding screw 630 is designed so that the lead angle of the screw shaft 631 is 45 °. When the screw shaft 631 is set at such an angle, the positive efficiency and the reverse efficiency of the sliding screw 630 are the same.

As described in "Problems to be Solved by the Invention", in the conventional scribe head, the scribe load of the cutter wheel 101 with respect to the substrate F varies depending on the location of the surface F1 of the substrate F. This is because the cutter wheel 101 does not operate corresponding to the shape of the surface F1 of the substrate F. Conversely, if the cutter wheel 101 operates following the shape of the surface F1 of the substrate F, it is considered that the scribe load does not fluctuate.

As shown in FIG. 10B, the reason why the cutter wheel 101 does not follow the shape of the surface F1 of the substrate F is the relationship between the positive efficiency and the reverse efficiency of the ball screw 700 provided in many conventional scribe heads. Will be.

As is generally known, the positive efficiency of a ball screw is the conversion efficiency from the rotary motion of the screw shaft to the linear motion of the nut, and the reverse efficiency is the conversion efficiency from the linear motion of the nut to the linear motion of the screw shaft. Efficiency.

When the screw shaft of the ball screw is rotated by the drive of the servomotor and the nut moves in the vertical direction, the cutter wheel presses the substrate and a skew load is applied to the substrate F. Thus, the operation of the cutter wheel is related to the positive efficiency of the ball screw.

On the other hand, when a scribe load is applied from the cutter wheel to the substrate F, a reaction force (resistance force) is applied from the substrate to the cutter wheel against the applied scribe load. Since this reaction force is in the direction opposite to the direction of the scribe load, the servomotor further applies the scribe load to the substrate so that the scribe load is not reduced by the reaction force.

Specifically, the cutter wheel and the nut are pressed by the reaction force applied to the cutter wheel from the substrate. As a result, the nut moves linearly, the screw shaft rotates, and the reaction force is transmitted to the servomotor. When the reaction force from the board is transmitted to the servomotor, a scribe load corresponding to this reaction force is applied to the board. The transmission of the reaction force to the servomotor in this way is related to the reverse efficiency of the ball screw.

Therefore, for example, in a ball screw in which the positive efficiency and the negative efficiency do not match, the positive efficiency is good, but the reverse efficiency is lower than the positive efficiency, the rotation of the screw shaft of the ball screw and the linear motion of the nut are smooth. This is done and the cutter wheel smoothly abuts on the substrate.

When the cutter wheel receives a reaction force from the board, the reaction force pushes up the nut through the cutter wheel and rotates the screw shaft. The rotational driving force of the screw shaft at this time is smaller than the rotational driving force of the screw shaft in positive efficiency. Therefore, the transmission of the reaction force to the servomotor is delayed, and the timing at which the load is applied to the reaction force is also delayed. As a result, the cutter wheel cannot properly contact the surface of the substrate.

As shown in FIG. 10B, the ball screw 700 used in the scribe head of Patent Document 1 and the like is composed of a screw shaft 701 and a nut 702. The lead angle of the screw shaft 701 stays at about 33 ° at most, and the positive efficiency and the reverse efficiency of the ball screw 700 are not the same. With such a lead angle, the ball screw 700 has lower reverse efficiency than positive efficiency.

When the forward efficiency and the reverse efficiency of the ball screw 700 are not the same, especially when the reverse efficiency as shown in FIG. 10B is lower than the positive efficiency, the screw shaft 701 when the cutter wheel 101 presses the substrate F The rotational driving force E3 and the rotational driving force E4 of the screw shaft 701 when receiving the reaction force from the substrate F do not have the same magnitude, and the rotational driving force E4 is smaller than the rotational driving force E3.

Therefore, when the ball screw 700 is used, the responsiveness of the cutter wheel 101 when moving in the vertical direction with respect to the surface F1 of the substrate F is low, and the followability of the cutter wheel 101 to the surface F1 of the substrate F is low. Therefore, when the surface F1 of the substrate F is displaced up and down, the cutter wheel 101 cannot properly maintain the contact of the substrate F with the surface F1, and as a result, the load fluctuates.

On the other hand, in the present embodiment, as shown in FIG. 10A, the sliding screw 630 is composed of a screw shaft 631 and a nut 632 designed to have a lead angle of 45 °. When the lead angle of the screw shaft 631 is 45 °, the ratio of the positive efficiency to the negative efficiency of the sliding screw 630 is 1: 1 and the positive efficiency and the reverse efficiency are the same.

When such a screw shaft 631 is used, the rotational driving force E1 of the screw shaft 631 when the cutter wheel 101 presses the substrate F and the rotational driving force E2 of the screw shaft 631 when the reaction force from the substrate F is received. And the size is the same.

As a result, the responsiveness of the substrate F of the cutter wheel 101 to the surface F1 is improved, and the followability of the substrate F of the cutter wheel 101 to the surface F1 is improved. Therefore, the fluctuation of the scribe load with respect to the shape of the surface F1 of the substrate F is suppressed. As a result, a predetermined scribe load can be maintained at any location on the surface F1 of the substrate F.

In the present embodiment, the sliding screw 630 including the screw shaft 631 whose lead angle is designed to be 45 ° is used, and the ball screw is not used. This is because the sliding screw 630 including the screw shaft 631 designed to have a lead angle of 45 ° is widely used as a general-purpose product and is easily available.

By driving the drive mechanism 600 provided with the sliding screw 630, the cutter wheel 101 can be brought closer to and separated from the surface F1 of the substrate F. In this embodiment, the cutter wheel 101 is further provided with another configuration for approaching and separating the cutter wheel 101 from the surface F1 of the substrate F. The configuration is the configuration of the moving mechanism 200 described with reference to FIGS. 5 to 9 and the pressure applying unit 500 described later (see FIG. 12).

The "other drive mechanism" in the claims corresponds to the combination of the moving mechanism 200 and the pressure applying unit 500.

Next, the specific operation of the moving mechanism 200 will be described with reference to FIGS. 11 and 5 to 9 as appropriate.

As described with reference to FIG. 9, the cutter mechanism 100 and the contact member 320 are connected to the transmission unit 230 of the moving mechanism 200. Therefore, in the moving mechanism 200, when the transmission unit 230 moves in the vertical direction with respect to the surface F1 of the substrate F, the cutter mechanism 100 and the contact member 320 also move in the vertical direction with respect to the surface F1 of the substrate F. As described with reference to FIG. 7A, the transmission unit 230 is connected to the support unit 222 via a pin 232, and the support unit 222 supports the first mover 220 and the second mover 221. do. Therefore, the movement of the transmission unit 230 is due to the movement of the first mover 220 and the second mover 221. Therefore, the movement of the first mover 220 and the second mover 221 will be described.

11 (a) and 11 (b) are for explaining the movement of the first mover 220 and the second mover 221 in the internal space 212 of the tubular portion 210 and the flow of air supplied to the internal space 212. It is a figure.

FIG. 11A shows a cross section of the tubular portion 210 in which the first mover 220 and the like are housed in the internal space 212 cut in a plane parallel to the YY plane when viewed from the positive side of the X axis. It is a sectional view. In FIG. 11A, the pin 232 of the transmission portion 230 is fitted in the hole 225 of the support portion 222. That is, the support portion 222 and the transmission portion 230 are connected. Further, in FIG. 11A, pipes 501 and 502 are omitted. FIG. 11B is an enlarged schematic view of the vicinity of the second mover 221 shown in FIG. 11A.

In the following description, "the side opposite to the support portion 222 with respect to the first mover 220" means "the Z-axis positive side of the first mover 220", and simply "the first mover 220. It may be described as "upper" or "upper side of the first mover 220". Further, "support portion 222 side with respect to the second mover 221" means "Z-axis negative side of the second mover 221", and is simply "below the second mover 221" or "second mover". It may be described as "below 221".

As shown in FIG. 11A, the first mover 220, the second mover 221 and the support part 222, the magnets 223 and 224 are housed in the internal space 212 of the tubular part 210, and the pin 232 of the transmission part 230 is accommodated. It is inserted into the hole 225 of the support portion 222. In such an internal space 212, air pressure is supplied from the pressure applying portion 500 (see FIG. 12) to the second space R2 arranged on the opposite side of the support portion 222 via the second mover 221 in the direction of the arrow. To. In the present embodiment, no air pressure is supplied to the first space R1 arranged on the opposite side of the support portion 222 with respect to the first mover 220.

As shown in the direction of the arrow in FIG. 11B, the air supplied from the pressure applying portion 500 (see FIG. 12) is supplied from the pipe 502 through the hole 210d to the second space R2. In the second space R2, a gap is formed between the second mover 221 and the internal space 212 (inner side surface 212a of the tubular portion 210). Therefore, the air supplied to the second space R2 passes through this gap. Further, as described above, since the opening 214 of the tubular portion 210 is formed so as to communicate with the internal space 212, a part of the air passing through the gap between the second mover 221 and the internal space 212 can be removed. It is discharged from the opening 214 to the outside of the cylinder portion 210.

Further, a part of the air supplied from the pressure applying portion 500 (see FIG. 12) to the second space R2 is a gap between the support portion 222 and the internal space 212, and the first mover 220 and the internal space 212. It flows into the first space R1 through the gap between the space and the space. Then, it is discharged from the pipe 501 through the hole 210c shown in FIG. 11 (a).

In FIG. 11B, for the sake of explanation, the gap between the second mover 221 and the internal space 212 and the gap between the support portion 222 and the internal space 212 are largely illustrated, but they are actually The gap spacing is very small. Therefore, when air pressure is supplied to the second space R2 from the pressure applying portion 500 (see FIG. 12), the second mover 221 is pressed toward the support portion 222 by this air pressure.

The second mover 221 is supported by the support portion 222 via a magnet 224, and the first mover 220 is supported by the support portion 222 via a magnet 223. Therefore, when the second mover 221 is pressed by the air pressure in the second space R2, the second mover 221, the support portion 222, and the first mover 220 move upward.

As described with reference to FIGS. 2 and 9, the cutter mechanism 100 is connected to the support portion 222 via the transmission portion 230. Therefore, the movement of the first mover 220 and the second mover 221 is transmitted to the cutter mechanism 100 via the transmission unit 230. Therefore, the cutter mechanism 100 moves with the movement of the first mover 220 and the second mover 221. In the above case, the cutter mechanism 100 and the cutter wheel 101 move upward.

In this way, the first mover 220 and the second mover 221 move upward due to the air pressure supplied from the pressure applying portion 500 to the moving mechanism 200. Since this movement is transmitted to the cutter mechanism 100 via the transmission unit 230, the cutter wheel 101 moves upward. In this way, an upward driving force is applied to the cutter wheel 101 by the air pressure supplied from the pressure applying portion 500 to the second space R2.

On the other hand, when the servomotor 610 of the drive mechanism 600 drives the cutter wheel 101 in the direction (downward) to move the cutter wheel 101 toward the substrate F side, the slide screw 630 applies a driving force to the cutter mechanism 100. As a result, the cutter mechanism 100 moves downward. In this way, the driving force of the servomotor 610 applies a downward driving force to the cutter wheel 101.

At this time, the cutter mechanism 100 moves downward, and this movement is transmitted to the support portion 222 via the transmission portion 230. Therefore, the first mover 220 and the second mover 221 move downward together with the cutter mechanism 100.

In this way, the scribe head 10 applies driving forces in different directions to the cutter wheel 101. Then, by this driving force, the cutter wheel 101 approaches and separates from the surface F1 of the substrate F.

When the pressure applying unit 500 applies air pressure, the driving force by the air pressure applied to the second space R2 by the pressure applying unit 500 is set to be smaller than the driving force by the servomotor 610. In this case, the first mover 220 and the second mover 221 move downward, and the cutter mechanism 100 also moves downward accordingly. As a result, the cutter wheel 101 can be brought into contact with the surface F1 of the substrate F.

Therefore, the scribe load of the cutter wheel 101 can be set from the difference between the driving force of the servomotor 610 and the driving force of the air pressure applied to the second space R2 by the pressure applying unit 500.

In this way, the scribe load can be taken out from the difference between the two driving forces having different directions, and the scribe load can be applied to the substrate F from the cutter wheel 101.

Further, as described above, when air pressure is supplied from the pressure applying portion 500 (see FIG. 12) to the second space R2, the supplied air is transferred to the second mover 221 and the inner side surface 212a of the cylinder portion 210. Pass through the gap between them. Further, a part of the air passing through this gap is discharged to the outside of the cylinder portion 210 from the opening 214, but the remaining air is generated between the second mover 221 and the inner side surface 212a of the cylinder portion 210. It flows into the first space R1 through the gap and is discharged from the hole 210c.

Therefore, the first mover 220 and the second mover 221 receive pressure in the direction away from the inner side surface 212a of the tubular portion 210 by passing air through the gap, and are centered at a position where the pressure is balanced. Will be done. Therefore, the first mover 220 and the second mover 221 are supported at the centering position in a state of being separated from the inner side surface 212a of the tubular portion 210.

As a result, the first mover 220 and the second mover 221 are supported by the support portion 222 in a non-contact state with the inner side surface 212a of the tubular portion 210, and therefore do not receive frictional resistance during movement. Therefore, when the first mover 220 and the second mover 221 move in the internal space 212 in the vertical direction, they can move smoothly without being hindered by the frictional resistance. Thereby, the scribe load on the substrate F of the cutter wheel 101 can be finely and stably adjusted.

FIG. 12 is a block diagram showing the configuration of the scribe head 10.

As shown in FIG. 12, the scribe head 10 includes the plate 12, the mounting plate 13, the stopper 14, the cutter mechanism 100, the moving mechanism 200, the measuring unit 300, the imaging unit 400, and the driving mechanism 600 shown in FIG. Further, it includes a control unit 510, a pressure applying unit 500, and a driving unit 520.

The pressure applying portion 500 includes an air pressure source (not shown) and supplies air pressure to the second space R2 of the internal space 212 of the tubular portion 210.

The drive unit 520 moves the plate 12 in the vertical direction with respect to the substrate F. As described above, the cylinder portion 210 of the moving mechanism 200 and the base 330 of the measuring portion 300 are fixed to the plate 12. Further, the drive mechanism 600 is fixed to the plate 12 via the mounting plate 13. Therefore, when the plate 12 moves in the vertical direction, the tubular portion 210, the table 330, the load cell 310 mounted on the table 330, and the drive mechanism 600 also move in the vertical direction.

The control unit 510 includes an arithmetic processing circuit such as a CPU and a memory such as a ROM, RAM, and a hard disk. The control unit 510 controls each unit according to a program stored in the memory.

Next, the operation of the scribe head 10 will be described with reference to FIGS. 13 to 14 (b). These operations are performed by the control unit 510 of FIG.

FIG. 13 is a side view of the scribe head 10 when the cutter wheel 101 abuts on the surface F1 of the substrate F when viewed from the negative side of the Y axis. 14 (a) and 14 (b) are side views of the scribe head 10 when viewed from the positive side of the X-axis. However, in FIGS. 14A and 14B, the cutter mechanism 100, the imaging unit 400, and the driving mechanism 600 are omitted, and only the plate 12, the moving mechanism 200, and the measuring unit 300 are shown.

When the scribe operation by the scribe head 10 is started, the control unit 510 drives the servomotor 610 (see FIGS. 1, 4 (a) and 4 (b)), and once the cutter wheel 101 is placed on the surface F1 of the substrate F. To evacuate. In this case, the control unit 510 drives the servomotor 610 so that the cutter mechanism 100 moves upward.

Then, the control unit 510 drives the servomotor 610 (see FIGS. 1, 4A and 4B) to bring the cutter wheel 101 closer to the surface F1 of the substrate F. That is, the control unit 510 drives the servomotor 610 so that the cutter mechanism 100 moves downward. Further, the control unit 510 causes the pressure application unit 500 to supply a predetermined air pressure to the second space R2. In this way, the driving force of the servomotor 610 and the driving force of the air pressure applied to the second space R2 by the pressure applying portion 500 are applied to the cutter wheel 101.

As shown in FIG. 13, the control unit 510 controls the pressure application unit 500 and the servomotor 610 so that the cutter wheel 101 comes into contact with the surface F1 of the substrate F by the difference between the two driving forces.

As shown in FIG. 14A, the nut 321 of the contact member 320 comes into contact with the protrusion 311 of the load cell 310 until the cutter wheel 101 comes into contact with the surface F1 of the substrate F. During this time, the load cell 310 measures the load of the cutter wheel 101.

Then, when the cutter wheel 101 comes into contact with the surface F1 of the substrate F (see FIG. 13), the plate 12 moves downward from the position N0 with respect to the surface F1 of the substrate F and is located at the position N1. Since the base 330 that supports the load cell 310 is connected to the plate 12, when the plate 12 moves, the base 330 also moves. As a result, the load cell 310 supported by the base 330 also moves, so that the load cell 310 is separated from the protrusion 311 of the contact member 320.

In this way, when the cutter wheel 101 abuts on the surface F1 of the substrate F, the load cell 310 separates from the abutting member 320. That is, the load cell 310 measures the load of the cutter wheel 101 until the cutter wheel 101 comes into contact with the surface F1 of the substrate F. Therefore, the load measured immediately before the load cell 310 separates from the contact member 320 is the load when the cutter wheel 101 comes into contact with the surface F1 of the substrate F. That is, the measured value at this time is the scribe load on the substrate F of the cutter wheel 101.

The control unit 510 calibrates the scribe load by comparing with the preset scribe load based on the measurement result by the load cell 310 (the scribe load measured immediately before the load cell 310 separates from the contact member 320).

Further, as shown in FIG. 2, the scribe head 10 is provided with a stopper 14 on the upper surface 151 of the cover 150 of the cutter mechanism 100. The stopper 14 is provided to prevent the cutter mechanism 100 from moving excessively upward. When the driving force by the air pressure applied to the second space R2 by the pressure applying portion 500 is excessively larger than the driving force by the servomotor 610, the cutter mechanism 100 tries to move upward, but the stopper 14 is attached to the mounting plate 13. Since it comes into contact with the upper wall 13a, the cutter mechanism 100 cannot move upward any more. In this way, the stopper 14 restricts the upward movement of the cutter mechanism 100.

Next, calibration of the scribe load will be described.

The control unit 510 refers to the pressure applying unit 500 so that the difference between the driving force of the servomotor 610 and the driving force of the air pressure applied to the second space R2 by the pressure applying unit 500 becomes a predetermined screen load. 2 Air pressure is supplied to the space R2. Further, the control unit 510 drives the servomotor 610. The air pressure and driving force required to obtain such a predetermined scribe load can be calculated in advance.

However, even if the theoretically calculated air pressure is supplied to the second space R2, it may not be possible to obtain a predetermined scribe load depending on, for example, the type of the substrate F, the specifications and the state of the cutter wheel 101, and the like. The same applies to the driving force of the servo motor 610. Therefore, in order to obtain a predetermined scribe load, a data table is created in which the calibration values of the air pressure supplied to the second space R2 and the driving force of the servomotor 610 are calculated by repeating tests and the like in advance. Such a data table is stored in the control unit 510 for controlling the scribe head 10. When a predetermined scribe load is set, the control unit 510 refers to the data table and causes the second space R2 to supply an appropriate air pressure to the pressure applying unit 500. Further, the control unit 510 drives the servomotor 610. As described above, when the control unit 510 is provided with a data table, it is possible to set a predetermined scribe load.

On the other hand, as shown in FIG. 14A, the load cell 310 mounted in the present embodiment is in contact with the contact member 320 until the cutter wheel 101 abuts on the surface F1 of the substrate F. Then, the load of the cutter wheel 101 is continuously measured.

Then, when the cutter wheel 101 comes into contact with the surface F1 of the substrate F (see FIG. 13), the load cell 310 and the contact member 320 are separated from each other as shown in FIG. 14 (b). Therefore, the load measured immediately before the contact member 320 separates from the load cell 310 corresponds to the load when the cutter wheel 101 comes into contact with the surface F1 of the substrate F, that is, the scribe load.

The control unit 510 compares the scribe load measured in this way with the set scribe load, and causes the pressure application unit 500 to supply an appropriate air pressure so that a predetermined scribe load is applied to the substrate F. , Drives the servo motor 610.

As described above, the scribe head 10 of the present embodiment can measure the scribe load immediately before forming the scribe line. That is, since the scribe load is always measured when the scribe line is formed, an appropriate air pressure is supplied to the second space R2 each time, and the servomotor 610 is driven. Therefore, the data table as described above is unnecessary.

Further, when the scribe load is adjusted with reference to the data table, the scribe load may not be measured again immediately before the scribe operation. In this case, although the scribe load is applied to the substrate F, it is unknown whether a predetermined scribe load is really applied.

On the other hand, in the scribe head 10 of the present embodiment, the scribe load immediately before the scribe operation is always measured. Therefore, the reliability of the scribe load is improved, and the scribe line can be formed with the set scribe load.

<Effect of embodiment>
According to this embodiment, the following effects are achieved.

As shown in FIGS. 4A, 4B, and 10A, the sliding screw 630 is configured so that the positive efficiency and the negative efficiency are the same. With this configuration, the rotational driving forces E1 and E2 of the screw shaft 631 when the cutter wheel 101 presses the substrate F and when the reaction force from the substrate F is received are equal. Therefore, the responsiveness of the cutter wheel 101 is improved, and as a result, the followability of the substrate F of the cutter wheel 101 to the surface F1 is improved. As a result, fluctuations in the scribe load with respect to the shape of the surface F1 of the substrate F are suppressed. Therefore, a predetermined scribe load can be maintained at any place on the surface F1 of the substrate F.

Further, the lead angle of the screw shaft 631 is designed to be 45 °. With this configuration, the ratio of the positive efficiency to the negative efficiency of the sliding screw 630 is 1: 1. Therefore, the forward efficiency and the reverse efficiency of the slip screw 630 can be set to be the same.

Further, as described above, the scribe head 10 employs a sliding screw 630. The sliding screw 630 with a lead angle of 45 ° is a general-purpose product and is easily available. Therefore, the drive mechanism 600 can be easily configured.

As shown in FIGS. 1, 5-9, the scribe head 10 further comprises another drive mechanism that brings the cutter wheel 101 closer to and further from the surface F1 of the substrate F. In this case, the other drive mechanism is the moving mechanism 200 and the pressure applying unit 500.

With this configuration, the driving force in the direction of separating the cutter wheel 101 from the surface F1 of the substrate F is applied by the moving mechanism 200 and the pressure applying portion 500, so that the driving force is applied to the substrate F by the difference between the driving mechanism 600 and the driving force. The scribe load can be finely adjusted in the low load range. Therefore, a scribe line can be satisfactorily formed with respect to the substrate F having a small thickness.

As shown in FIGS. 2, 7 (a) and 7 (b), the scribe head 10 supplies air pressure from the pressure applying portion 500 to the second space R2.

With this configuration, the difference between the driving force of the servomotor 610 and the driving force of the air pressure applied to the second space R2 by the pressure applying portion 500 can be set as the scribe load applied to the cutter wheel 101. At this time, a part of the air supplied to the second space R2 is discharged from the opening 214 through the gap between the second mover 221 and the inner side surface 212a of the tubular portion 210. As the air passes through the gap in this way, the second mover 221 receives pressure in a direction away from the inner side surface 212a of the tubular portion 210, and is centered at a position where the pressure is in equilibrium. Further, a part of the air supplied to the second space R2 passes through the gap between the first mover 220 and the inner side surface 212a of the tubular portion 210. As a result, the first mover 220 is also aligned.

Therefore, the first mover 220 and the second mover 221 are supported at the centering position in a state of being separated from the inner side surface 212a of the tubular portion 210. Further, the first mover 220 is also arranged on the support portion 222 so that a gap is provided between the first mover 220 and the inner side surface 212a of the tubular portion 210. As described above, since the first mover 220 and the second mover 221 are supported in a non-contact state with respect to the inner side surface 212a of the tubular portion 210, they are not subjected to frictional resistance during movement. Therefore, the moving mechanism 200 and the pressure applying portion 500 can stably apply the driving force to the cutter wheel 101.

Therefore, the scribe load of the cutter wheel 101 can be finely and stably adjusted by the difference between the driving force of the servomotor 610 and the driving force of the air pressure applied to the second space R2 by the pressure applying portion 500.

In this way, since the scribe load of the cutter wheel 101 can be finely and stably adjusted, the scribe load of the cutter wheel 101 on the substrate F is kept constant at any place on the surface F1 of the substrate F.

As shown in FIG. 5, the first mover 220 and the second mover 221 are spheres, and the internal space 212 of the tubular portion 210 has a cylindrical shape.

With this configuration, the gap between the first mover 220 and the second mover 221 and the inner side surface 212a of the tubular portion 210 is gently reduced, so that the air supplied from the pressure applying portion 500 to the second space R2 can be smoothly supplied. Can be distributed. Further, since the gap can be made uniform over the entire circumference of the latitude line having the maximum diameter of the inner side surface 212a of the tubular portion 210, the first mover 220 and the second mover 221 can be smoothly aligned and the first mover 221 is aligned. It can be in a non-contact state over the entire circumference of the 1 mover 220 and the 2nd mover 221. Therefore, the first mover 220 and the second mover 221 can smoothly move in the vertical direction in the internal space 212 in a non-contact state.

As shown in FIG. 7A, the first mover 220 and the second mover 221 are formed to have the same diameter, and the diameter of the inner side surface 212a of the tubular portion 210 is constant.

With this configuration, the same type of sphere can be used as the first mover 220 and the second mover 221. Therefore, the configuration of the movement mechanism 200 can be simplified and the assembly work can be facilitated.

Further, the first mover 220 and the second mover 221 are formed of a magnetic material, and the support portion 222 includes magnets 223 and 224 at both ends of the first mover 220 and the second mover 221 in the separation direction.

With this configuration, the first mover 220 and the second mover 221 can move in a direction perpendicular to the separation direction with respect to the support portion 222. Therefore, even if the support portion 222 cannot move in the radial direction of the tubular portion 210, the first mover 220 and the second mover 221 are relative to the support portion 222 due to the air flowing in the gap. Moves to and is positioned at the centering position. Therefore, the first mover 220 and the second mover 221 can be smoothly and appropriately aligned. As a result, in the internal space 212, the first mover 220 and the second mover 221 can be set to a more appropriately non-contact state.

As shown in FIG. 6A, the upper surface 223a of the magnet 223 and the lower surface 224a of the magnet 224 with respect to the first mover 220 and the second mover 221 are flat surfaces.

With this configuration, the first mover 220 and the second mover 221 make point contact with the magnets 223 and 224, so that the first mover 220 and the second mover 221 can easily move with respect to the support portion 222. Therefore, the pressure from the air flowing through the gap between the first mover 220 and the second mover 221 and the inner side surface 212a of the tubular portion 210 causes the first mover 220 and the second mover 221 to be smoothly aligned. Can be moved.

As shown in FIGS. 5 and 7A, the transmission portion 230 is connected to the support portion 222 via the opening 214.

With this configuration, the opening 214 is shared with the discharge of the air supplied to the second space R2 and the connection of the transmission unit 230, so that the configuration of the tubular unit 210 can be simplified.

Further, for example, when the driving force by the air pressure applied to the second space R2 by the pressure applying portion 500 is excessively higher than the driving force by the servomotor 610, the cutter wheel 101 is in contact with the substrate F. Nevertheless, a scribe load is further applied to the substrate F. In such a case, an excessive scribe load may be applied to the substrate F, and the substrate F may be damaged.

However, the pin 232 of the transmission unit 230 is movable within the range of the opening 214. That is, the movement of the transmission unit 230 is restricted. Therefore, in the above case, even if the first mover 220 and the second mover 221 try to move downward, the pin 232 abuts on the lower end of the opening 214, so that the first mover 220 and the second mover 221 Cannot move further down. As a result, there is no possibility that an excessive scribe load is applied to the substrate F.

As shown in FIGS. 7A and 7B, when the pin 232 is fixed in the hole 225 of the support portion 222 by the screw 226, the end portion of the pin 232 does not protrude from the hole 225, so that the pin 232 is a cylinder. Does not come into contact with the inner side surface 212a of the portion 210. Further, when the pin 232 of the transmission portion 230 is inserted into the hole 225 of the support portion 222, a gap is created between the side surface 211a of the cylinder portion 210 and the bottom surface 231a of the groove 231 and the side wall 233 of the transmission portion 230. The groove 231 of the transmission portion 230 is fitted into the protrusion 211 so that a gap is also formed between the 234 and the side surface 210a of the cylinder portion 210.

With such a configuration, the contact area between the transmission portion 230 and the cylinder portion 210 is reduced. Therefore, when the first mover 220 and the second mover 221 move, the transmission unit 230 also moves, but the frictional resistance between the transmission unit 230 and the cylinder portion 210 is reduced. Therefore, the scribe load of the cutter wheel 101 can be adjusted more finely.

As shown in FIGS. 13 to 14B, when the cutter wheel 101 comes into contact with the surface F1 of the substrate F, the load cell 310 is separated from the contact member 320. The load cell 310 measures the load of the cutter wheel 101 immediately before the contact member 320 separates. This load is a scribe load on the substrate F of the cutter wheel 101.

As a result, when the screen load value set by the user and the screen load value measured immediately before the load cell 310 separates from the contact member 320 are different, the control unit 510 determines the measured value by the load cell 310. An appropriate pressure is supplied to the second space R2 to the pressure applying portion 500. In this way, the appropriate scribe load is adjusted. As a result, the scribe head 10 can form a scribe line in a state where the reliability of the scribe load is enhanced.

In addition, the scribe load is measured when the scribe operation is started. By this measurement, air pressure is supplied from the pressure applying portion 500 to the second space R2 so that a predetermined scribe load is applied to the substrate F. Further, the driving force is output by the servo motor 610. Therefore, it is not necessary to mount the data table in which the calibration value of the scribe load is converted into data on the scribe head 10.

Further, in order to detect the position where the cutter wheel abuts on the substrate (position at 0 point), a sensor is usually provided at the tip of the cutter wheel. As a result, when the cutter wheel comes into contact with the board, the sensor comes into contact with the board and the zero point position is detected. However, as the sensor comes into contact with the substrate many times, the sensor may deteriorate and the zero point position may not be detected accurately. In such a case, the position of the surface of the substrate is not specified, and a predetermined scribe line cannot be formed.

In this regard, as described above, in the scribe head 10 of the present embodiment, the load cell 310 continuously measures the load of the cutter wheel 101 until the cutter wheel 101 comes into contact with the surface F1 of the substrate F. Then, when the cutter wheel 101 abuts on the surface F1 of the substrate F, the load cell 310 separates from the abutting member 320. The load value changes immediately before the load cell 310 separates from the contact member 320. That is, the time when the load value changes is the time when the cutter wheel 101 comes into contact with the surface F1 of the substrate F, and the position of the cutter wheel 101 at this time is the 0 point position.

Therefore, the scribe load is obtained by the load cell 310, and at the same time, the 0 point position is detected. In this way, the zero point position of the cutter wheel 101 can be detected with high accuracy without using a sensor.

Further, when the cutter wheel 101 comes into contact with the surface F1 of the substrate F, the plate 12 moves downward, and the nut 321 of the contact member 320 and the protrusion 311 of the load cell 310 are separated from each other.

As a result, the cutter wheel 101 can form a scribe line on the substrate F while following the waviness (unevenness) generated on the surface F1 of the substrate F and moving in the vertical direction.

Further, even when the scribe head 10 is not used, a constant air pressure can be constantly applied to the second space R2 from the pressure applying portion 500. As a result, the cutter mechanism 100 is always positioned upward. That is, the cutter wheel 101 is always positioned above the substrate F, the mounting portion 6, and the like. Therefore, when the scribe head 10 is not used, it is possible to reliably prevent the scribe head 10 from falling due to its own weight and causing the cutter wheel 101 to collide with the substrate F, the mounting portion 6, or the like and be damaged.

<Modification example>
Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and the embodiment of the present invention can be modified in various ways other than the above.

For example, in the above embodiment, the driving force by the servomotor 610 is applied to the cutter wheel 101 from above, and the air pressure by the pressure applying unit 500 is applied from below.

In the modified example, in addition to the driving force of the servomotor 610 from above, the cutter wheel 101 is further applied with air pressure by the pressure applying portion 500.
According to this configuration, it can be changed to form a scribe line with a high load.

In this case, the pipe 501 shown in FIGS. 2 and 5 and the pressure applying portion 500 are connected by a pipe (not shown), and the air pressure from the pneumatic source is individually supplied to the first space R1 and the second space R2. It is configured as follows.

Further, as shown in FIG. 11A, the air pressure supplied to the first space R1 presses the first mover 220 and the second mover 221 downward. Further, as described above, the direction of the driving force by the servomotor 610 is the direction (downward) for moving the cutter wheel 101 toward the substrate F side. On the other hand, the driving force by the air pressure applied to the second space R2 by the pressure applying unit 500 is upward.

That is, the difference between the driving force due to the air pressure supplied to the first space R1 and the driving force due to the servomotor 610 and the driving force due to the air pressure applied to the second space R2 becomes the scribing load on the substrate F of the cutter wheel 101. Equivalent to.

As described above, the servomotor 610 of the present invention is equipped with a ball screw in which the positive efficiency and the negative efficiency are set to be the same. Therefore, when a driving force by air pressure is applied in addition to the servomotor 610, a larger scribe load can be applied to the substrate F more efficiently.

For example, since a substrate made of ceramics is hard, it is not possible to properly form a scribe line with a low scribe load. In this respect, when the scribe head 10 is configured as described above, the cutter wheel 101 can apply a larger scribe load to the substrate F, so that even a hard substrate or a thick substrate can be used. The scribe line can be formed properly.

When air pressure is supplied to the first space R1, a part of the air supplied to the first space R1 passes through a gap between the first mover 220 and the internal space 212, and is a cylinder from the opening 214. It is discharged to the outside of the unit 210. At this time, the first mover 220 receives pressure in a direction away from the inner side surface 212a of the tubular portion 210, and is centered at a position where the pressure is in equilibrium. Therefore, the first mover 220 is reliably supported at the centering position in a state of being separated from the inner side surface 212a of the tubular portion 210.

Further, for example, a substrate having a thin substrate needs to be applied with a lower scribing load. Therefore, when it is desired to apply a low load scribe load to the substrate F, air pressure can be applied by the pressure applying unit 500 instead of the servomotor 610.

In this case, as described above, the pipe 501 shown in FIGS. 2 and 5 and the pressure applying portion 500 are connected by a pipe (not shown), and the air pressure from the pneumatic source is applied to the first space R1 and the second space R2. Supplied individually. Thereby, the scribe load can be obtained from the pressure difference between the first space R1 and the second space R2, and a minute scribe load can be applied to the substrate F.

Further, in the above embodiment, the lead angle of the screw shaft 631 is designed to be 45 °, but the screw shaft 631 may be designed so that the positive efficiency and the reverse efficiency are substantially equal to each other. For example, the lead angle may be designed to be within the range of 45 ° to several degrees.

Further, in the above embodiment, the slide screw 630 is used as the lead screw, but if the lead screw includes a screw shaft designed so that the positive efficiency and the reverse efficiency are substantially equal to each other, the lead screw of the above embodiment is used. It is not limited to the sliding screw 630.

For example, it may be a dedicated ball screw including a screw shaft designed so that the lead angle is around 45 °.

Further, in the above embodiment, the forming direction of the scribe line can be changed by 90 ° by rotating the mounting portion 6 and rotating the substrate F, but as a modification, the cutter wheel 101 itself is 90 °. It may be configured to rotate. In this case, the holder unit 110 that holds the cutter wheel 101 shown in FIGS. 3A to 3C is configured to be rotatable.

In addition, various modifications of the embodiment of the present invention can be made as appropriate within the scope of the technical idea shown in the claims.

1 ... Scribe device 6 ... Mounting part 11 ... Transfer part 10 ... Scribe head 100 ... Cutter mechanism 101 ... Cutter wheel 200 ... Moving mechanism 210 ... Cylinder part 212 ... Internal space 212a ... Cylinder part inner side surface 214 ... Opening 220 ... No. 1 mover 221 ... second mover 222 ... support portion 223, 224 ... magnet 223a ... upper surface (contact surface)
224a ... Bottom surface (contact surface)
225 ... Hole 230 ... Transmission part 232 ... Pin 300 ... Measuring part 310 ... Load cell 320 ... Contact member 500 ... Pressure applying part 600 ... Drive mechanism 610 ... Servo motor 630 ... Sliding screw 631 ... Screw shaft 632 ... Nut F ... Board F1 … Substrate surface R1… 1st space R2… 2nd space

Claims (9)

A cutter wheel for forming a scribe line on the surface of the board,
A drive mechanism for bringing the cutter wheel into contact with the surface of the substrate is provided.
The drive mechanism is
Servo motor and
A screw shaft that is rotated around the shaft by the servo motor,
Includes a nut that is screwed into the screw shaft and causes the cutter wheel to approach and separate from the surface of the substrate by rotation of the screw shaft.
The positive and negative efficiencies of the screw shaft and nut are the same ,
Other drive mechanisms that move the cutter wheel closer to and further from the substrate.
The other drive mechanism is
Movement mechanism and
Further provided with a pressure applying portion for supplying air pressure to the moving mechanism,
The moving mechanism is
With the first mover
A second mover arranged at a position closer to the substrate than the first mover,
A support portion that supports the first mover and the second mover at predetermined intervals, and
A tubular portion that houses the first mover, the second mover, and the support portion, and has an opening that communicates with the outside at a position between the first mover and the second mover.
Includes a transmission unit for transmitting the movement of the first mover and the second mover to the cutter wheel.
A gap is provided between the first mover and the second mover and the inner side surface of the cylinder portion.
The pressure applying portion is at least the second of the first space opposite the support portion with respect to the first mover and the second space opposite the support portion with respect to the second mover. Supplying air pressure to the space,
A scribe head that features that. In the scribe head according to claim 1 ,
The first mover and the second mover are spheres.
The inner surface of the tubular portion has a cylindrical shape.
A scribe head that features that. In the scribe head according to claim 1 or 2 .
The first mover and the second mover have the same diameter and have the same diameter.
The diameter of the inner surface of the cylinder is constant.
A scribe head that features that. In the scribe head according to any one of claims 1 to 3.
The first mover and the second mover are formed of a magnetic material and are formed of a magnetic material.
The support includes a magnet at an end in contact with both ends of the first mover and the second mover in the separation direction.
A scribe head that features that. In the scribe head according to claim 4 .
The contact surface of the magnet with respect to each of the first mover and the second mover is a plane.
A scribe head that features that. In the scribe head according to any one of claims 1 to 5 .
The transmission portion is connected to the support portion via the opening.
A scribe head that features that. In the scribe head according to any one of claims 1 to 6 .
The screw shaft has a lead angle of 45 °.
A scribe head that features that. In the scribe head according to any one of claims 1 to 7 .
The screw shaft and the nut constitute a sliding screw.
A scribe head that features that. In the scribe head according to any one of claims 1 to 8 .
Further, a measuring unit for measuring the load of the cutter wheel on the substrate is provided.
A scribe head that features that.

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