JPH032720A - Method and device for producing liquid crystal display element - Google Patents

Abstract

PURPOSE:To efficiently produce good products with a high yield by supporting the outside surface of another glass substrate facing a scribed cut on a glass substrate to be cut and pressing a flexible pressure body to the outside surface of the glass substrate to be cut to concentrate the tensile stress to the scribed out. CONSTITUTION:A joined body 1 of glass substrates is placed on a supporting member 11 so that scribes cuts 5 on an upper glass substrate 3 face supporting projections 11a and 11b provided on the supporting member 11, and a pressure member 12 is lowered to press a flexible pressing body 16 to the upper glass substrate 3. Therefore, an approximately uniform pressing force is applied to both sides of scribed cuts 5 and the supporting member 11 of the joined body 1 is convexly bent. Consequently, the tensile stress is concentrated to scribed cuts, and the upper glass substrate 3 is cut along scribed cuts 5. Thus, the joined body 1 of glass substrates is not moved at the time of cutting to obtain cut faces of high precision, and the productivity is improved.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method for manufacturing a liquid crystal display element and an apparatus for manufacturing a liquid crystal display element, and in particular to a method for cutting a glass substrate that will become a part of a liquid crystal display element, and a method for cutting a glass substrate after the liquid crystal display element. It relates to an apparatus for carrying out the method.

[Conventional technology]

Conventionally, a method for manufacturing a liquid crystal cell has been to attach two glass substrates on which a large number of upper and lower electrodes are formed in a predetermined arrangement, with each of the electrodes on the inside, and with a sealing material of a predetermined shape interposed therebetween. A commonly used method is to make a scribe mark on the outer surface of each glass substrate at the intended cutting position, curve the glass substrate, and cut the two glass substrates one by one.

FIG. 5 is a schematic configuration diagram of a glass substrate cutting apparatus conventionally applied to this type of processing, in which a cylinder 22 is vertically arranged above a flat flexible sheet 21, and a cylinder 22 is arranged vertically below the cylinder 22. A suppressor 23 having an acute-angled tip is attached to the lower end of the piston rod 22a that extends to the piston rod 22a.

This device connects a bonded body 24 of glass substrates to a flexible sheet 21.
After adjusting the position of the bonded body 24 so that the scribe mark made at the intended cutting position of one glass substrate 24a placed on top of the flexible sheet 21 and in contact with the flexible sheet 21 faces the presser 23, the piston rod 22a is placed on the joined body 24. to drive the presser 23
is pressed against the outer surface of the other glass substrate 24b. In this way, the pressing force of the presser 23 causes the flexible sheet 2 to
1 is elastically deformed, and the joined body 24 is curved as shown in the figure. As a result, tensile stress concentrates on the scribe scratch, a crack grows from the end of the scribe scratch, and the one glass substrate 24a can be cut.

FIG. 6 is a schematic configuration diagram showing another example of this type of glass substrate cutting device, which is a hard support member having two support protrusions 25a and 25b protruding from the upper surface at a predetermined interval. 2
Above the supporting protrusions 25a and 2, an acute-angled tip is provided.
A suppressor 26 similar to that described above is disposed so as to face the central portion of 5b (described in Japanese Patent Publication No. 58-3212).

In this device, a bonded body 24 of glass substrates is placed on a support member 25, and a scribe mark 2 is made at a planned cutting position of one glass substrate 24a in contact with support protrusions 25a and 25b.
After adjusting the position of the bonded body 24 so that 7 faces the presser 26, the presser 26 is moved to the other glass substrate 24b.
Press it against the outside surface of the In this way, the support protrusion 25
The bonded body 24 is curved due to the clearance between the tips of the tips 25a and 25b and the flat surface of the support member 25, and the one glass substrate 14a is cut.

(9! Problem to be solved by Akira) All of the above devices apply local pressing force to the glass substrate and do not have a means for holding parts of the glass substrate other than the support part and the load part. , the bonded glass substrate may sway during cutting, causing the cut parts to collide with each other.
There is a problem in that the yield of non-defective products is low because chips or irregular cracks occur on the cut surface.

Further, the above-mentioned apparatus has a problem in that even if a large number of scribe scratches are made on the glass substrate in advance, it can only cut one spot at a time, resulting in poor production efficiency of liquid crystal cells.

The present invention has been made to solve the problems of the prior art described above, and its first purpose is to provide a method for manufacturing non-defective products with high yield and high efficiency. The purpose of this invention is to provide a manufacturing apparatus suitable for carrying out such a manufacturing method.

[Means to solve the problem]

In order to achieve the first object, the present invention includes two glass substrates each having a large number of upper plate electrodes and a plurality of upper plate electrodes formed in a predetermined arrangement, and a sealing material having a predetermined shape with each of the electrodes on the inside. manufacturing a liquid crystal display element, including the step of: scribing each glass substrate at the intended cutting position on the outer surface of each glass substrate, and cutting the two glass substrates one by one by curving the glass substrate; In the method, when cutting the glass substrate, support the outer surface of the other glass substrate facing the free scratches made on the glass substrate to be cut, and add flexibility to the outer surface of the glass substrate to be cut. The pressure body was pressed to concentrate tensile stress on the scribe scratches.

In addition, in order to achieve the second object, a support member that supports a glass substrate with a scribe mark at a scheduled cutting position is provided, and the glass substrate supported by this support member is pressed to form a surface where the scribe mark is formed. In an apparatus for manufacturing a liquid crystal display element, the apparatus includes a pressure means for applying tensile stress to the support member, in which one or more support protrusions corresponding to the scribe scratches are protruded from the upper surface of the support member, and A flexible press body was provided on the lower surface to be wide and capable of applying tensile stress to both sides of the scribe groove.

[Effect]

Place the assembled glass substrate on the support member so that the scribe marks made on the upper glass substrate face the support protrusions protruding on the support member, and lower the pressure member to soften the glass substrate. When the sexual suppressor is pressed onto the glass substrate on the upper surface side, a substantially equal pressing force is applied to both sides of the glass substrate through the scribe scratches, and the supporting portion of the bonded body curves upward in a convex manner. Therefore, tensile stress can be concentrated on the scribe scratches, and the glass substrate on the top side can be cut from the scribe scratches.
I can do it.

At that time, the wide and flexible pressing body presses the area around the scribe scratch widely, so the bonded glass substrate does not move during cutting, and the cut surfaces do not collide with each other, resulting in high precision. It is possible to obtain a cut surface of

Further, by providing a plurality of support protrusions protruding from the support member, it becomes possible to perform cutting at a plurality of locations at the same time, thereby improving productivity.

〔Example〕

Prior to explaining the present invention, a bonded body of glass substrates, which is the basis of a liquid crystal display element, will be explained based on FIG.

As shown in this figure, the bonded body 1 includes a sealing material 2 having a predetermined shape.
It consists of two glass substrates 3 and 4 bonded together via
In a process prior to cutting, a scribe mark 5 is made on the outer surface of one glass substrate 3 at the intended cutting position, and a scribe mark 6 is made on the outer surface of the other glass substrate 4 at the intended cutting position. In each small section surrounded by the sealing material 2 and the two glass substrates 3 and 4, a desired upper plate electrode and lower plate electrode are formed facing each other, and a liquid crystal alignment process is performed ( As these are not the gist of the present invention, their illustrations are omitted).
Therefore, a desired liquid crystal cell can be taken out by growing a crack in the thickness direction of each glass substrate 3, 4 using each scribe scratch as a starting point and cutting the glass substrates 3, 4.

Next, an example of a manufacturing apparatus for a liquid crystal display element according to the present invention will be explained based on FIG. 1.

As shown in this figure, the device of this embodiment includes a support member 11 having two parallel support protrusions 11a and 11b protruding from the upper surface thereof, and the support protrusion 11a.

Pressure member I2 formed wider than interval dx of 11b
It consists of

The support member 11 is entirely made of a hard material, and is given such rigidity that it will not deform when pressurized. The two support protrusions 11a.

11b has a flat top surface, and its width w1 is equal to the scribe scratch 5 made on the one glass substrate 3.
It is formed wider than the width w2 of the scribe scratch 6 made on the other glass substrate 4 adjacent thereto. Moreover, the interval d1 between the two support protrusions 11a and 11b is determined between the scribe scratch 5 made on the one glass substrate 3 and the scribe scratch 6 made on the other glass substrate 4 adjacent thereto. It is formed equal to the pitch dz. The height h of the support protrusions 11a and llb is the same as that of the glass substrate 3,
Although it can be changed as appropriate depending on the thickness of 4, the pitch of scribe scratches 5 and 6, etc., a thickness of about 100 μm is usually sufficient.

The pressurizing member 12 includes a base body 15 in which an air supply/exhaust port 13 and an air chamber 14 adjacent to the base body 15 are formed, and a diaphragm 16 stretched around the base body 15 to seal the air chamber. It consists of This pressurizing member 12 has a glass substrate on which a diaphragm rubber 16 that expands downward when air at the door chamber pressure is supplied into the air chamber 14 through the air supply/exhaust port 13 is placed on a support member ll. is set at such a position that the bonded body l can be suppressed with a predetermined pressure.

The air pressure supplied to the air chamber 14 is controlled by the glass substrate 3,
Although it can be changed as appropriate depending on the thickness of 4, the pitch of scribe scratches 5 and 6, etc., about 1.0 to 1.5 kg/cm2 is usually sufficient.

Hereinafter, a method of manufacturing a liquid crystal display element according to the present invention using the above-mentioned apparatus will be explained with reference to FIGS. 3 and 4.

First, as shown in FIG. 3, the glass substrate assembly 1 is placed on the support member ll so that the scribe scratches 5 made on the upper glass substrate 3 correspond to the support protrusions 11a and llb. , adjust its setting position.

Next, pressurized air is supplied to the air chamber 14 from the air supply/exhaust port 13 to expand the diaphragm rubber 16, and its pressing force presses the glass substrate assembly l downward.

In this way, the joined body 1 is curved due to the step d1 between the top surfaces of the support protrusions 11a and llb and the flat surface of the support member 11, and tensile stress is applied to both sides of the scribe scratches 5 made on the glass substrate 3 on the upper surface side. acts. For scribe scratch 5,
Because this tensile stress concentrates, cracks grow in the thickness direction of the glass substrate 3 starting from the scribe scratches 5.
Glass substrate 3 is cut. Note that at this time, since compressive stress acts on both sides of the scribe scratch 6 made on the lower glass substrate 4, the lower glass substrate 4 is not cut.

Thereafter, by turning the glass substrate assembly 1 upside down and performing the same operations as described above, the glass substrate 4 on the lower surface side can be cut, and thereby a desired liquid crystal cell can be taken out.

The apparatus and method for manufacturing a liquid crystal display element according to the embodiment described above includes a bonded body 1 of glass substrates with the periphery of a scribe scratch 5 being widely pressed by a flexible diaphragm rubber 16.
Since the bonded body 1 of the glass substrates does not move during cutting, the cut surfaces do not collide with each other, so that highly accurate cut surfaces can be obtained.

Further, the support member 11 has two support protrusions 11a.

11b is provided in a protruding manner so that two places can be cut at the same time, resulting in excellent productivity.

Furthermore, the top surfaces of the support protrusions 11a and llb are formed into a planar shape, and the width w1 is determined by the scribe scratches 5 made on one glass substrate 3 and the scribe scratches made on the other glass substrate 4 adjacent thereto. Since it is formed wider than the width wz of the support member 6, it is possible to simultaneously cut portions with different pitches of scribe scratches using one support member 11.

In the above embodiment, the diaphragm rubber 16 was used as the flexibility suppressing body, but in place of this, an elastic body having appropriate flexibility is provided on the lower surface of the base, and the pressure member is moved up and down. It is also possible to press the bonded body 1 of the glass substrates.

Furthermore, in the embodiment described above, two supporting protrusions 11a and llb were provided protrudingly on the supporting member ll.

One or a plurality of support protrusions may be provided protrudingly.

In addition, the configuration of the joined body, the arrangement of the scribe scratches, the dimensions and arrangement of the support protrusions, etc. can be appropriately designed as necessary.

〔Effect of the invention〕

As explained above, according to the present invention, the flexible suppressor widely presses the periphery of the scribe scratch, so the bonded glass substrate does not move during cutting, and the cut surfaces abut each other. Since there is no need for cutting, highly accurate cutting surfaces can be obtained.

Further, by providing a plurality of support protrusions protruding from the support member, it becomes possible to perform cutting at a plurality of locations at the same time, thereby improving productivity.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views of a glass substrate for explaining the manufacturing apparatus and method for manufacturing a liquid crystal display element according to the present invention, and FIG. 3 is a cross-sectional view showing a setting process of a glass substrate assembly. FIG. 4 is a sectional view showing the cutting process of the glass substrate assembly. 5 and 6 are diagrams for explaining the prior art, in which FIG. 5 is a sectional view showing a first example of a conventional liquid crystal display element manufacturing apparatus, and FIG. 6 is a conventional liquid crystal display element manufacturing apparatus. It is a sectional view showing a second example of the device. 1... Bonded body of glass substrates, 2... Sealing material, 3.4... Glass substrates, 5, 6...
...Scribe scratches, 11...Supporting member, lla
, llb...Support protrusion. 2...Pressure member, 3...Air supply/exhaust port, 6...Diaphragm rubber. Figure 3 Figure 4 Figure 2 Figure 5 Figure 6

Claims (2)

[Claims] (1) After bonding two glass substrates each having a large number of upper plate electrodes and lower plate electrodes formed in a predetermined arrangement with each of the electrodes on the inside and a sealing material of a predetermined shape, each of the above-mentioned In the method for manufacturing a liquid crystal display element, the method includes a step of making a scribe mark on an outer surface of a glass substrate at a planned cutting position, curving the glass substrate, and cutting the two glass substrates one by one, when cutting the glass substrate. , Support the outer surface of the other glass substrate facing the scribe scratches made on the glass substrate to be cut, and press a flexible pressure body against the outer surface of the glass substrate to be cut to remove the scribe scratches. A method for manufacturing a liquid crystal display element, characterized in that tensile stress is concentrated. (2) A support member that supports a glass substrate with scribe marks at the planned cutting position, and pressure that presses the glass substrate supported by this support member to apply tensile stress to the surface where the scribe marks are formed. In the apparatus for manufacturing a liquid crystal display element, the top surface of the support member is provided with one or more support protrusions corresponding to the scribe scratches, and the bottom surface of the pressure member is widened to form the scribe. 1. An apparatus for manufacturing a liquid crystal display element, characterized in that a flexible pressing body capable of applying tensile stress to both sides of the groove is provided.