TWI650293B - Scribe tool - Google Patents

Abstract

In the case where the scribe line is formed at the position directly above and below the sealing material, a scribe tool capable of forming a crack of a sufficient depth on the substrate is provided.

The scribing tools 30 and 40 are provided with holders 303 and 403, grooves 303a and 403a formed under the holders 303 and 403 and the holders 303a and 403a, and a pair of grooves 303b and 403b for holding the grooves 303a and 403a. The method is formed on the lower surface of the holders 304 and 404; the scoring wheels 301 and 401 are rotatably mounted on the grooves 303a and 403a; and the pair of rollers 302 and 402 are rotatably mounted on the pair of grooves 303b and 403b, respectively; The shafts 301a, 401a of the scoring wheels 301, 401 and the shafts 302a, 402a of the rollers 302, 402 are separated from each other by a predetermined distance in the scoring direction.

Description

Scribe tool

The present invention relates to a scoring tool for forming a score line on a substrate.

Conventionally, the breaking of a brittle material substrate such as a glass substrate is performed by a step of forming a scribe line on the surface of the substrate, and a step of applying a predetermined force to the surface of the substrate along the formed scribe line. In the scribing step, the tip of the scoring wheel is pressed against the surface of the substrate while being moved along a predetermined line. In the formation of the score line, a scoring device having a scribing head is used.

Patent Document 1 listed below describes a method for cutting a liquid crystal panel from a mother substrate. In this method, a mother substrate is formed by bonding a substrate on which a thin film transistor (TFT) is formed and a substrate on which a color filter (CF) is formed through a sealing material. Each liquid crystal panel is obtained by the division of the mother substrate.

The sealing material is disposed such that the space in which the liquid crystal injection regions are formed remains in a state in which the two substrates are bonded together.

In the case where the mother substrate having the above configuration is divided, a method of forming a scribe line on both surfaces of the mother substrate by using two scribe heads can be used (for example, refer to Patent Document 2). In this case, the two scribing heads are configured to sandwich the mother substrate. The two scoring wheels are positioned at the same position as when the substrate is viewed from above. In this state, the two scoring wheels are in the same direction The time is moved to form a score line on each surface of the substrate.

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2006-137641

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2012-241902

As shown in the above Patent Document 1, in the conventional mother substrate, there is a region where there is no intervening sealing material between adjacent liquid crystal injection regions. Therefore, in the case where the scribe lines are simultaneously formed on both surfaces of the mother substrate by the two scribe heads as described above, the scribe line can be formed in the region where the intervening sealing material is not provided. When the mother substrate is formed by forming the scribe line in this manner, the liquid crystal panel has an edge region of a predetermined width remaining around the liquid crystal injection region.

However, in recent years, especially in liquid crystal panels for mobile phones, the narrow edge region has become the mainstream. In order to meet this demand, the region where the intervening sealing material is not disposed on the mother substrate is omitted, and the adjacent liquid crystal injection regions need to be separated by only the sealing material. In this case, the score line is formed to be formed directly under the seal member and directly below.

However, the inventors of the present invention have confirmed that if the scribe line is formed at the position immediately above and below the sealing material in this manner, cracks cannot be sufficiently generated on the two glass substrates. When the cracking step is performed in such a state that the crack is insufficient, the edge of the substrate after the cracking is slightly cracked or broken, and the strength of the glass substrate is lowered.

In view of the above problems, the present invention provides a scribing tool for forming a scribe line at a position directly above and below a sealing material, and is capable of forming a crack having a sufficient depth on the substrate.

The inventors of this case repeatedly tried the mistake and found it on the front and the positive side of the sealing material. In the case where the lower position forms a scribe line, only a predetermined distance is generated in the scribe direction by the scribe positions on the upper and lower sides of the mother substrate, and cracks deeper than the respective substrates are generated. The present invention relates to a scribing tool capable of moving a predetermined distance only in the scoring direction at each of the scribing positions on the upper and lower sides of the mother substrate, and pressing the surface opposite to the scoring wheel by a roller.

The main aspect of the present invention relates to a scribing tool which is used when forming a scribe line on a mother substrate in which a first substrate and a second substrate are bonded together by a sealing material. The scribing tool of the present aspect includes: a holder; a first groove formed on the lower surface of the holder; and a pair of second grooves formed on the lower surface of the holder so as to sandwich the first groove; the scoring wheel The first groove is rotatably mounted; and the pair of rollers are rotatably mounted in the pair of second grooves. The rotation axis of the scoring wheel and the rotation axis of the roller are separated from each other by a predetermined distance in the scribing direction.

By using the scribing tool of the present state, it is possible to move a predetermined distance only in the scribing direction on each of the scribing positions on the upper and lower sides of the mother substrate, and the surface opposite to the scoring wheel is pressed by the roller. Thereby, the depth of the crack becomes deep, and the formation state of the crack can be stabilized.

In the sculpt tool of the present aspect, the scoring wheel and the pair of rollers can be disposed such that one of the pair of rollers partially clamps a portion of the scoring wheel. With this configuration, the distance between the scoring wheel and the roller can be reduced in the scribing direction.

In the sculpt tool of the present aspect, the holder is made of a magnetic material, and a shape in which the side surface of the cylinder is obliquely cut to form an inclined surface can be obtained. In this way, the scoring tool can be smoothly mounted on the scribing head by providing the magnet by the hole in which the holder of the scribing head is provided. Further, since the hole is disposed to abut against the pin of the inclined surface, the scribing tool can be positioned at a normal position.

In this case, the first groove and the second groove are on both sides of the holder The inclined surface is formed on one side of one of the two side faces that communicate with the first groove and the second groove, and the scribing wheel and the pair of rollers are the aforementioned scribing wheel The pair of rolls are formed close to the side surface on which the inclined surface is formed.

Alternatively, the first groove and the second groove are formed to communicate with the two side faces of the holder, and the inclined surface is provided on one side of one of the two side faces that communicate with the first groove and the second groove. Further, the scribing wheel and the pair of rollers are formed such that the pair of rollers are closer to the side surface of the inclined surface than the scribing wheel.

In this way, the arrangement order of the scoring wheel and the pair of rollers is based on the inclined surface, and two kinds of scribing tools different from each other are prepared in advance, whereby the parent substrate is separately mounted and held separately. A pair of scoring tools of different types can be used to make the upper scoring wheel and the lower roller oppose each other, and the lower scoring wheel and the upper roller can be opposed to each other.

In the characterization of the tool, it is desirable to set the aforementioned predetermined distance to 0.5 mm or more. If so, the depth of the crack can be effectively deepened.

Further, in the present state, the scribing wheel is formed by forming a V-shaped blade edge on the outer circumference of the disk and having grooves at a predetermined interval on the ridge line of the blade edge. In the embodiment shown below, an experiment was conducted by using such a scribing wheel to confirm that cracks were formed in depth.

As described above, according to the present invention, it is possible to provide a scribing tool in which a scribe line is formed at a position directly above and below the sealing material, and a crack of a sufficient depth can be formed on the substrate.

The effects and significance of the present invention will be further clarified by the description of the embodiments shown below.

However, the embodiment shown below is of course only an example when the present invention is implemented. It is to be noted that the present invention is not limited to the embodiments described below.

30, 40‧‧‧ scribing tools

301, 401‧‧‧ marking wheel

302, 402‧‧‧ Roll

303, 403‧‧‧ Keeping

303a, 403a‧‧‧ slots (1st slot)

303b, 403b‧‧‧ slots (2nd slot)

303c, 403c‧‧‧ sloped surface

Fig. 1 is a view schematically showing the configuration of a scoring apparatus of an embodiment.

Fig. 2 is an exploded perspective view showing the configuration of the scribe head of the embodiment.

Fig. 3 is a perspective view showing the configuration of the scribe head of the embodiment.

Fig. 4 is a view for explaining the scribing method 1.

Fig. 5 is a view showing the results of experiments conducted by the scribing method 1.

Fig. 6 is a view for explaining the scribing method 2 of the embodiment.

Fig. 7 is a view showing the results of an experiment conducted by another scribing method 2 of the embodiment.

Fig. 8 is a perspective view showing the configuration of a scribing tool of the embodiment.

Fig. 9 is a perspective view showing the configuration of a scribing tool of the embodiment.

Fig. 10 is a perspective view showing the configuration of a scribing tool of the embodiment.

Fig. 11 is a view schematically showing a method of mounting the scoring tool of the embodiment.

Fig. 12 is a view schematically showing the configuration of a scribing tool of a modified example.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Furthermore, in the drawings, for convenience, the X-axis, the Y-axis, and the Z-axis orthogonal to each other are noted. The X-Y plane is parallel to the horizontal plane and the Z-axis direction is the vertical direction.

<scratching device>

1(a) and 1(b) are diagrams schematically showing the configuration of the scoring apparatus 1. Fig. 1(a) is a view of the scribing device 1 as seen from the positive side of the Y-axis. Fig. 1(b) is a view of the scribing device 1 as seen from the positive side of the X-axis.

Referring to Fig. 1(a), the scoring apparatus 1 includes a conveyor belt 11, pillars 12a and 12b, guides 13a and 13b, guides 14a and 14b, sliding units 15, and 16, and two scribing heads 2.

As shown in Fig. 1(b), the conveyor belt 11 is extended in the Y-axis direction except where the scribing head 2 is disposed. The mother substrate G is placed on the conveyor belt 11. The mother substrate G has a substrate structure in which a pair of glass substrates are bonded to each other. The mother substrate G is carried by the conveyor belt 11 in the Y-axis direction.

The pillars 12a and 12b are attached to the base of the scoring apparatus 1 to sandwich the conveyor belt 11 and are vertically disposed. The guides 13a and 13b and the guides 14a and 14b are respectively disposed between the pillars 12a and 12b so as to be parallel to each other in the X-axis direction. The slide units 15 and 16 are slidably provided on the guides 13a and 13b and the guides 14a and 14b, respectively. Each of the guides 13a and 13b and the guides 14a and 14b is provided with a predetermined drive mechanism, and by this drive mechanism, the slide units 15 and 16 are moved in the X-axis direction.

The scribing heads 2 are respectively mounted on the sliding units 15, 16. The scribing heads 2 on the positive side of the Z-axis and the scribing heads 2 on the negative side of the Z-axis are respectively attached with the scribing tools 30, 40 so as to face the mother substrate G. The scribing head 2 is moved in the X-axis direction while being pressed by the scribing wheel held by the scribing tools 30 and 40 on the surface of the mother substrate G. Thereby, a scribe line is formed on the surface of the mother substrate G.

<scribe head>

Fig. 2 is an exploded perspective view showing a portion of the scribing head 2. Fig. 3 is a perspective view showing the configuration of the scribe head 2.

Referring to Fig. 2, the scribing head 2 includes an elevating mechanism 21, a scribing line forming mechanism 22, a base plate 23, a top plate 24, a bottom plate 25, a rubber frame 26, an outer cover 27, and a servo motor 28.

The elevating mechanism 21 includes a cylindrical cam 21a connected to a drive shaft of the servo motor 28, and a follower 21c formed on the upper surface of the elevating portion 21b. Lifting portion 21b, through the sliding member (not shown) is supported by the base plate 23 so as to be movable in the vertical direction, and is biased in the positive Z direction by the spring 21d. The follower 21c is pressed against the lower surface of the cylindrical cam 21a by the biasing force of the spring 21d. The lifting portion 21b is coupled to the score line forming mechanism 22. When the cylindrical cam 21a is rotated by the servo motor 28, the cam action lifting portion 21b of the cylindrical cam 21a is moved up and down, and the scribe line forming mechanism 22 ascends and descends. The scribing tools 30, 40 are attached to the lower end of the score line forming mechanism 22.

The rubber frame 26 is an airtight elastic member. The rubber frame 26 has a shape that is fitted into the groove 23a of the base plate 23, the groove 24a of the top plate 24, and the groove 25a of the bottom plate 25. In a state in which the rubber frame 26 is attached to the grooves 23a, 24a, and 25a, the surface of the rubber frame 26 is burned outward from the side surfaces of the base plate 23, the top plate 24, and the bottom plate 25.

The outer cover 27 has a shape in which three plate portions of the front surface portion 27a, the right side surface portion 27b, and the left side surface portion 27c are bent. Two holes 27f are formed in the lower end edge of the front portion 27a.

In a state in which the rubber frame 26 is fitted in the grooves 23a, 24a, and 25a, the right side surface portion 27b and the left side surface portion 27c of the outer cover 27 are deformed so as to be bent outward, and the outer cover 27 is attached to the base plate 23, the top plate 24, and the bottom plate. 25. In this state, the screw is screwed into the top plate 24 and the bottom plate 25 through the two holes 27f formed in the upper end edge of the front portion 27a. Further, Ross is screwed into the screw holes formed on the outer sides of the grooves 23a, 24a, and 25a of the base plate 23, the top plate 24, and the bottom plate 25. Thereby, the outer cover 27 is sandwiched by the base plate 23, the top plate 24, and the bottom plate 25 and the head of the screw, and the peripheral edge portions of the right side surface portion 27b and the left side surface portion 27c are pressed against the rubber frame 26. Thus, the scribing head 2 is assembled as shown in FIG.

As shown in FIG. 1(a), the two scribing heads 2 are disposed above the mother substrate G, respectively. The two scribing heads 2 have the same composition. The scoring tools 30, 40 are mounted on the two scribing heads 2, It is changed according to the method of scribing. Among the two scribing methods shown below, in the scribing method 1, the scribing tools 30, 40 that only hold the scoring wheels 301, 401 are used. Further, in the scoring method 2, the scribing tools 30, 40 that hold the scoring wheels 301, 401 and the rollers 302, 402 are used.

Hereinafter, the two scribing methods will be described.

<Scoring method 1>

4(a) to 4(c) are views for explaining the scribing method of the embodiment. Fig. 4(a) is a schematic view when the vicinity of the scribing position is observed from the negative side of the Y-axis, and Fig. 4(b) is a schematic view when the scribing position is observed from the positive side of the X-axis, and Fig. 4(c) is a positive view from the Y-axis. A side view of the vicinity of the scoring position.

As shown in Fig. 4(a), in the present scribing method, the scribing wheel 301 of the head 2 is engraved on the upper side (the positive side of the Z-axis), and the engraved head 2 is engraved on the lower side (the negative side of the Z-axis). The circular wheel 401 moves in the scoring direction (the positive X-axis direction) only in a manner that the distance W1 is the front and the two scoring wheels 301 and 401. The two scoring wheels 301, 401 are rotatably mounted with scoring tools 30, 40 with the shafts 301a, 401a as rotating shafts, respectively.

Referring to Fig. 4(b), the mother substrate G is formed by bonding the two glass substrates G1 and G2 through the sealing material SL. A color filter (CF) is formed on the glass substrate G1, and a thin film transistor (TFT) is formed on the glass substrate G2. The liquid crystal injection region R is formed by the sealing material SL and the two glass substrates G1 and G2, and liquid crystal is injected into the liquid crystal injection region. The two scoring wheels 301, 401 are positioned so as not to be offset from each other in the Y-axis direction. The scribing wheel 301 is pressed against the surface of the glass substrate G1 at a position directly above the sealing material SL, and the scoring wheel 401 is pressed against the surface of the glass substrate G2 at a position immediately below the sealing material SL.

As shown in FIG. 4(c), the seal members SL are arranged in a lattice shape. The two scoring wheels 301 and 401 are moved in the positive X-axis direction along the sealing material SL. Thereby, as shown in FIGS. 4(b) and 4(c), L1 and L2 are formed on the surfaces of the glass substrates G1 and G2, respectively.

In the scribing method shown in Figs. 4(a) to 4(c), the roller for pressing the surface of the mother substrate G on the opposite side (the negative side of the Z-axis) from the scribing wheel 301 is not provided, and it is not provided. There is a roller that presses the surface of the mother substrate G on the opposite side (the positive side of the Z axis) from the scoring wheel 401.

<Experiment 1>

The inventors of the present invention conducted an experiment of forming a score line on the mother substrate G in accordance with the scribing method shown in Figs. 4(a) to 4(c). Hereinafter, the experiment and experimental results will be described.

In the experiment, a substrate (mother substrate) to which the glass substrates G1 and G2 having a thickness of 0.2 mm were bonded through the sealing material SL was used. The size of the bonded substrate (mother substrate) was 118 mm × 500 mm. The scoring wheels 301 and 401 are manufactured by Samsung Diamond Industrial Co., Ltd., MicroPenett (registered trademark of Samsung Diamond Industry Co., Ltd.). The scribing wheels 301 and 401 are configured to form a V-shaped blade edge on the outer circumference of the disk and have grooves at a predetermined interval on the ridge line of the blade edge. The scoring wheels 301 and 401 have a diameter of 3 mm, a cutting edge angle of 110°, a number of grooves 550, and a groove depth of 3 μm. The scribing wheels 301 and 401 of the configuration are as shown in Figs. 4(a) to 4(c), respectively. In this manner, the glass substrates G1 and G2 are pressed while being pressed to perform the scribing operation.

The load applied to the scoring wheels 301, 401 is controlled to be 6.5 N during the scribing action. Further, the moving speed of the scoring wheels 301 and 401 is made constant (200 mm/sec).

Based on the above conditions, the amount of penetration of cracks in the glass substrates G1 and G2 was measured while changing the distance W1 between the two scoring wheels 301 and 401. As a comparative example, the amount of penetration of the crack in the case where the distance W1 between the scoring wheels 301 and 401 is 0 is also measured. In each measurement, in addition to the amount of penetration of the crack, the ribbed mark was also measured.

The experimental results are shown in Figures 5(a) to (e). Figure 5 (a) shows the crack seepage by numerical values. Figure 5(b)~(e) is a cross-sectional photograph of the mother substrate G on the score line, which is 0.4mm, 0.6mm, 0.8mm, and 1.0mm, respectively. . In Figs. 5(b) to 5(e), D1 and D3 are rib-shaped marks, and D2 and D4 are crack penetration amounts.

Referring to Fig. 5(a), when the distance W1 exceeds 0.6 mm, the amount of crack penetration of the glass substrate G becomes larger as compared with the case where the distance W1 is 0 mm. When a crack is generated in one of the glass substrates G1 and G2 with a large amount of penetration, the mother substrate G can be appropriately cut in the cracking step.

For example, as shown in the comparative example (W1 = 0 mm), if the amount of cracks in the glass substrates G1 and G2 is small and is half the thickness (0.2 mm) of the glass substrates G1 and G2, the cracking step is performed. It is necessary to break the glass substrates G1 and G2 from both sides of the mother substrate G, respectively. When the glass substrates G1 and G2 are respectively broken from the both sides of the mother substrate G as described above, the edges of the glass substrates G1 and G2 are slightly cracked or broken, and the strength of the glass substrates G1 and G2 is low. Hey.

On the other hand, when the distance W1 is 0.6 mm to 1.4 mm, the amount of crack penetration into the glass substrate G2 is small, and the amount of crack penetration into the glass substrate G1 is large. In the case where the amount of crack penetration of the glass substrate G1 is large, in the cracking step, it is preferable that the glass substrate G2 having a small amount of crack penetration is broken only from one side of the mother substrate G, and the cracking action is preferable. At the same time, the glass substrate G1 which generates a deep crack is also broken along the crack at the same time. When the glass substrates G1 and G2 are only broken from one side of the mother substrate G as described above, the edges of the glass substrates G1 and G2 are not cracked or broken, and the strength of the glass substrates G1 and G2 is maintained at a high level.

For the above reasons, it is desirable that the mother substrate G is broken, and it is desirable that cracks are generated in a large amount of penetration of either of the glass substrates G1 and G2. In this experiment, as shown in Figure 5 (a), two scoring wheels When the distance W1 between 301 and 401 exceeds 0.6 mm, the amount of crack penetration of the glass substrate G1 becomes larger than that of the comparative example (W1 = 0 mm). Therefore, it is desirable that the distance W1 between the two scoring wheels 301 and 401 is 0.6 mm or more. By setting the distance W1 between the two scoring wheels 301 and 401 as described above, the cracking of the mother substrate G can be appropriately performed.

<Scoring method 2>

4(a) to (c), the surface of the mother substrate G opposite to the scoring wheel 301 (the negative side of the Z axis) is not pressed by the roller, and The surface of the mother substrate G on the side opposite to the scoring wheel 401 (positive side of the Z axis) is also not pressed by the roller. On the other hand, in the present scribing method, the surface of the mother substrate G on the side opposite to the scoring wheel 301 (the negative side of the Z axis) and the surface of the mother substrate G on the side opposite to the scoring wheel 401 (the positive side of the Z axis) , respectively, pressed by a roller.

6(a) and 6(b) are diagrams illustrating the scribing method 2. Fig. 6(a) is a schematic view showing the vicinity of the scribing position from the negative side of the Y-axis. Fig. 6(b) is a schematic view showing the vicinity of the scribing position from the positive side of the X-axis.

As shown in Fig. 6(a), in the present scribing method, the surface of the mother substrate G on the opposite side (the negative side of the Z-axis) from the scoring wheel 301 is pressed against the two rollers 402, and, in contrast, the scoring wheel 401 The surface of the mother substrate G on the side (positive side of the Z axis) is pressed by the two rolls 302. The two rollers 302 are disposed to sandwich the scoring wheel 301, and are rotatable with the shaft 302a as a rotating shaft. Further, the two rollers 402 are disposed so as to sandwich the scribing wheel 401, and are rotatable with the shaft 402a as a rotating shaft.

Similarly to the scribing method 1, the two scoring wheels 301 and 401 are shifted by W1 only in the scoring direction (X-axis direction). The two scoring wheels 301 and 401 are respectively pressed along the sealing material SL while being pressed against the glass substrates G1 and G2. There is a gap between the scoring wheel 301 and the two rollers 302 in the Y-axis direction, and there is also a gap between the scoring wheel 401 and the two rollers 402 in the Y-axis direction. therefore, The rollers 302 and 402 are moved in the positive X-axis direction so as to straddle the score lines L1 and L2 formed by the scoring wheels 301 and 401.

<Experiment 2>

The inventors of the present invention conducted an experiment of forming a score line on the mother substrate G in accordance with the scribing method shown in Figs. 6(a) and 6(b). Hereinafter, the experiment and experimental results will be described.

The mother substrate G and the scoring wheels 301 and 401 used in this experiment were the same as those in the above experiment 1. In this experiment, the distance W1 between the scoring wheels 301 and 401 was set to 2.2 mm. Further, the moving speed of the scoring wheels 301 and 401 is made constant (200 mm/sec). The eccentric amount of the scribing wheel 301 with respect to the center of the load of the scribing head 2 of the upper side is 1.0 mm, and the eccentric amount of the scribing wheel 401 with respect to the center of the load of the scribing head 2 of the lower side is 3.2 mm.

The center positions of the axes 301a, 401a of the scoring wheels 301, 401 are respectively coincident with the center positions of the shafts 302a, 402a of the rollers 302, 402 in the Z-axis direction, and the diameters of the rollers 302, 402 are respectively associated with the row wheels 301, 401. The diameter is the same as 3 mm.

Based on the above conditions, the amount of crack penetration of the glass substrates G1 and G2 was measured while changing the load applied to the scribing tools 30 and 40.

The experimental results are shown in Figures 7(a) to (e). Fig. 7(a) is a numerical diagram showing the amount of crack penetration and the amount of rib-shaped marks, and Figs. 7(b) to (e) are cross-sectional photographs of the mother substrate G on the score line, respectively, having a load of 6N, 7N, 8N, 9N situation. In Figs. 7(b) to 7(e), D1 and D3 are rib-shaped marks, and D2 and D4 are crack penetration amounts.

Referring to Fig. 7(a), when the load is changed from 5N to 6N, it is understood that the amount of crack penetration of the glass substrate G1 is rapidly increased. Further, when the load exceeds 6 N, the amount of crack penetration of the glass substrate G1 exceeds 80% of the thickness (0.2 mm) of the glass substrate G1, and the amount of penetration on the glass substrate G1 A large number of cracks are generated. As described above, when one of the glass substrates G1 and G2 is cracked with a large amount of penetration, the mother substrate G can be appropriately cut in the cracking step. Therefore, in the scribing method 2, it is desirable that the load applied to the scribing tools 30, 40 is set to 6 N or more.

Further, in this experiment, the amount of crack penetration of the glass substrate G1 was further increased as compared with the above experiment 1. Therefore, the crack is stably formed while the amount of crack penetration is increased. For the scribing method 2, it is desirable to press the rolls 402 and 302 on the side opposite to the scribing wheels 301 and 401 of the mother substrate G.

<scoping tool>

8(a) and 8(b) are perspective views showing the configuration of the scribing tools 30 and 40, respectively. 9(a) to 9(c) are a left side view, a front view, and a right side view showing the configuration of the scoring tool 30. 10(a) to (c) are a left side view, a front view, and a right side view showing the configuration of the scoring tool 40.

The scribing tools 30 and 40 have the same configuration except for the order in which the scoring wheels 301 and 401 and the rollers 302 and 402 are arranged. The scribing tools 30 and 40 are provided with holders 303 and 403 for holding the scoring wheels 301 and 401 and the rollers 302 and 402, respectively. The holder 303 is formed of a ferromagnetic body.

The holders 303 and 403 include grooves 303a and 403a to which the scoring wheels 301 and 401 are attached, grooves 303b and 403b to which the rollers 302 and 402 are attached, and inclined surfaces 303c and 403c. The grooves 303a and 403a and the grooves 303b and 403b communicate with each other on the side surface before and after the holders 303 and 403. The inclined faces 303c and 403c are formed by cutting the cylindrical side faces of the holders 303 and 403 obliquely from the front side. The scoring wheels 301, 401 are mounted by inserting the shafts 301a, 401a into the holes of the holders 303, 403. The rollers 302, 402 are mounted by plunging the shafts 302a, 402a into the holes of the holders 303, 403.

11(a) and (b) are schematic illustrations showing the engraving of the scribing forming mechanism 22. Figure with 30 installation method. Fig. 11 (a) and (b) show the state of the internal perspective of the score line forming mechanism 22.

At the lower end of the score line forming mechanism 22, a holding portion 221 for holding the scribing tool 30 is provided, and a hole 222 into which the scribing tool 30 can be inserted is formed in the holding portion 221. A magnet 224 is disposed at the bottom of the hole 222, and a pin 223 is disposed at an intermediate position of the hole 222. The holder 303 of the scoring tool 30 is formed of a ferromagnetic body.

In the case where the scribing forming mechanism 22 is mounted with the scoring tool 30, the holder 303 of the scoring tool 30 is inserted into the hole 222 of the holding portion 221. When the upper end of the holder 303 is close to the magnet 224, the holder 303 is attracted by the magnet 224. At this time, the inclined surface 303c of the holder 303 abuts against the pin 223, and the holder 303 is positioned at the normal position. Thereby, as shown in FIG. 11(b), the scribing tool 30 is attached to the lower end of the score line forming mechanism 22.

Similarly, the scribing tool 40 is attached to the lower end of the score line forming mechanism 22. Thus, if the scribing tools 30, 40 are respectively attached to the scribing line forming mechanism 22 of the corresponding scribing head 2, as shown in Figs. 6(a) and (b), the position of the scoring wheel 301 is positioned. The roller 402, and the roller 302 is positioned at a position corresponding to the scoring wheel 401. When the scribing tools 30 and 40 having the configuration shown in Figs. 8(a) and 8(b) are used, the scribing tools 30 and 40 are only attached to the scribing line forming mechanism 22 of the corresponding scribing head 2, respectively. The distance W1 between the scoring wheel 301 and the scoring wheel 401 is maintained at a predetermined distance, and the scoring wheels 301, 401 and the rollers 402, 302 are positioned and aligned with each other.

Further, the above experiment 2 was carried out using the scribing tools 30 and 40 having the configurations shown in Figs. 8(a) and 8(b). Further, in the above experiment 1, the grooves 303b and 403b are omitted from the holders 303 and 403, and the holders 303 and 403 having only the grooves 303b and 403b are respectively used, and the scribing tool 30 to which the scoring wheels 301 and 401 are attached is used. 40.

<Effects of Embodiments>

According to this embodiment, the following effects can be exhibited.

By using the scribing tools 30 and 40 as shown in FIGS. 8 to 10, the scribing positions on the upper and lower sides of the mother substrate can be displaced only by a predetermined distance in the scribing direction, and the scribing wheel and the opposite side can be faced. Press with a roller. As shown in Experiment 2, at the position directly above the seal member SL, the score line L1 can be formed by a deep crack. By providing the scribing tools 30, 40 with the rollers 302, 402, the amount of crack penetration is further increased, and cracks are formed stably.

In the scribing tools 30 and 40 shown in FIGS. 8 to 10, the scoring wheels 301 and 401 and the pair of rollers 302 are disposed such that one of the pair of rollers 302 and 402 partially sandwiches one of the scribing wheels 301 and 401. 402. According to this configuration, the distance between the scoring wheels 301, 401 and the rollers 302, 402 can be reduced in the scoring direction.

In the scribing tools 30 and 40 shown in FIGS. 8 to 10, the holders 303 and 403 are made of a magnetic material, and the side faces of the cylinder are obliquely cut to have a shape formed by the inclined faces 303c and 403c. Therefore, by providing the magnet 224 by the hole 222 in which the holders 303, 403 of the scribing head 2 are attached, the scribing tools 30, 40 can be smoothly attached to the scribing head 2. Further, since the hole 222 is provided with the pin 223 against which the inclined surfaces 303c and 304c abut, the scoring force by the magnet 224 can be used to position the scribing tools 30 and 40 at the normal position.

Further, by using the scribing tools 30, 40 of the two types shown in Figs. 8(a) and (b), the scribing tools 30, 40 are only provided by the scribing forming mechanisms respectively attached to the corresponding scribing heads 2 22, while keeping the distance W1 between the scoring wheel 301 and the scoring wheel 401 at a predetermined distance, and simultaneously aligning the scoring wheels 301, 401 and the rollers 402, 302 with each other.

<Modification>

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and the embodiments of the present invention may be various modifications other than the above.

For example, in the above-described embodiment, the scriber wheel in which the groove is formed at a predetermined interval is formed on the ridge line of the blade edge. However, it is conceivable that the same effect can be obtained by using the scribe wheel which is not formed by the ridge line. The size or shape of the scoring wheel (tool tip) is not limited to the above-described embodiment, and other sizes, shapes, and types of blade tips can be used as appropriate.

Further, in the above embodiment, the scribing wheel 301 on the upper side of the mother substrate G is oriented forward with respect to the scribing wheel 401 on the lower side of the mother substrate, but the scribing wheel 301 on the lower side of the mother substrate G is opposed to each other. It is also preferable that the scribing wheel 401 on the upper side of the mother substrate is in the front of the scribing direction. This situation can also exert the same effect as described above.

Further, in the configuration of Figs. 6(a) and 6(b) and Figs. 8(a) and 8(b), the center positions of the axes 301a and 401a of the scoring wheels 301 and 401 are respectively coupled to the axes 302a of the rollers 302 and 402, The center positions of the 402a are aligned in the Z-axis direction, and the diameters of the scribing wheels 301, 401 are the same as the diameters of the rolls 302, 402, respectively. However, the relationship between the scoring wheels 301 and 401 and the rollers 302 and 402 is not limited thereto, and various other modifications are possible.

For example, as shown in Fig. 12(a), the diameter of the scoring wheel 301 is preferably larger than the diameter of the roller 302 by Δd1, or, as shown in Fig. 12(b), the diameter of the scoring wheel 301 is larger than that of the roller. The diameter of 302 is also smaller than Δd2. Further, as shown in Fig. 12(c), it is preferable that the center position of the shaft 301a of the scribing wheel 301 is offset from the center position of the shaft 302a of the roller 302 by only Δd3 in the negative direction of the Z-axis, or, as shown in Fig. 12 ( d), it is preferable that the center position of the shaft 301a of the scribing wheel 301 is offset from the center position of the shaft 302a of the roller 302 by only Δd4 in the positive direction of the Z-axis. The scoring wheel 401 and the roller 402 can also be changed in the same manner.

Further, in the configuration examples of FIGS. 12(b) and (d), the lower end of the roller 302 is lower than the lower end of the scribing wheel 301, and the roller 302 is more strongly pressed against the glass substrate G1 during the scribing operation. . When the roller is pressed so strongly, the glass substrate G1 is deflected in the Z-axis direction, whereby the back surface of the glass substrate G1 is subjected to the tensile force in the direction in which the crack is opened. Therefore, when the blade edge of the other scribing wheel 401 is pressed against the back surface of the portion of the glass substrate G1 which is pressed by the roller 302, the crack can be easily penetrated by the tensile force. Therefore, in the configuration examples of FIGS. 12(b) and (d), it is conceivable that a deeper crack can be formed by the scribing wheel 401 on the back side of the corresponding roller 302.

Further, the configuration, thickness, material, and the like of the mother substrate G are not limited to those described in the above embodiment, and the scribing devices 30 and 40 can be used for cutting the mother substrate G of another configuration.

The embodiments of the present invention can be variously modified as appropriate within the scope of the technical idea shown in the claims.

Claims (11)

A scribing tool is used when a scribing line is formed on a mother substrate in which a first substrate and a second substrate are bonded together by a sealing material, and is characterized in that: a holder is provided; and a first groove is formed in the holding a pair of second grooves formed on the lower surface of the holder so as to sandwich the first groove; the scoring wheel being rotatably mounted in the first groove; and a pair of rollers in the pair The second grooves are rotatably mounted; the rotation axis of the scoring wheel and the rotation axis of the roller are separated from each other by a predetermined distance in the scoring direction. The scoring tool of claim 1, wherein the scoring wheel and the pair of rollers are disposed such that one of the pair of rollers partially clamps a portion of the scoring wheel. The scoring tool of claim 1, wherein the holder is made of a magnetic material, and the side surface of the cylinder is obliquely cut to form an inclined surface. The scoring tool of claim 2, wherein the holder is made of a magnetic material, and the side surface of the cylinder is obliquely cut to form an inclined surface. The scoring tool of claim 3, wherein the first groove and the second groove are formed to communicate with the two side faces of the holder, and the inclined surface is provided in the first groove and the second groove a side surface of one of the two side faces that communicates with each other; the scribing wheel and the pair of rollers are formed such that the scribing wheel is closer to the side surface of the inclined surface than the pair of rollers. The scoring tool of claim 4, wherein the first slot and the second slot The groove is formed to communicate with the two side faces of the holder, and the inclined surface is provided on a side surface of one of the two side faces that communicate with the first groove and the second groove; the scribing wheel and the pair of rollers are The scribing wheel is formed such that the pair of rollers are adjacent to the side surface on which the inclined surface is formed. The scoring tool of claim 3, wherein the first groove and the second groove are formed to communicate with the two side faces of the holder, and the inclined surface is provided in the first groove and the second groove a side surface of one of the two side faces that communicates with each other; the pair of rollers and the pair of rollers are formed such that the pair of rollers are closer to the side surface of the inclined surface than the scribing wheel. The scoring tool of claim 4, wherein the first groove and the second groove are formed to communicate with the two side faces of the holder, and the inclined surface is provided in the first groove and the second groove a side surface of one of the two side faces that communicates with each other; the pair of rollers and the pair of rollers are formed such that the pair of rollers are closer to the side surface of the inclined surface than the scribing wheel. The scoring tool according to any one of claims 1 to 8, wherein the predetermined distance is set to 0.5 mm or more. The scoring tool according to any one of claims 1 to 8, wherein the scoring wheel forms a V-shaped blade edge on the outer circumference of the disc and has a groove at an arbitrarily spaced ridge line of the cutting edge. form. The scoring tool of claim 9, wherein the scoring wheel is formed by forming a V-shaped blade edge on the outer circumference of the circular plate and having grooves at a predetermined interval on the ridge line of the cutting edge.