JPH11223803A - Cell substrate and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the cell substrate in high yield and the manufacture of the cell substrate which can improve the quality of a parting surface nearby the liquid crystal intake of a seal material by using a nonalkaline glass cell substrate. SOLUTION: Seal materials 13 on both the sides of the liquid crystal intake 13A have three projection parts 13B each formed at equal intervals. The projection parts 13B are formed on both the sides of the liquid crystal intake 13A of the seal materials 13 although the tips of the projection parts 13B reach a scribe line, so the tips of the projection parts 13B operate as force points on 12A and 12B on a base substrate, so secure parting along the scribe line becomes possible, so that the parting surface of good quality can be formed. Consequently, the cell substrate can be formed in good yield.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cell substrate,
More specifically, the present invention relates to a cell substrate in which a transparent substrate is divided and formed by a scribe / break method.

[0002]

2. Description of the Related Art Conventionally, a cell substrate (liquid crystal cell) 1 as shown in FIG. 5 has been known. In this cell substrate 1, two glass substrates 2a and 2b each having an electrode (not shown) formed on the opposite surface side are arranged to face each other with a gap of several μm, and a display is provided between the two glass substrates 2a and 2b. The two glass substrates 2a, 2a
b is bonded and fixed. Then, it is used as a substrate of a liquid crystal display element in which a liquid crystal (not shown) is sealed in a gap 4 formed by both glass substrates 2a, 2b and a sealing material 3. The liquid crystal is injected into a part of the sealing material 3 from a liquid crystal inlet 3A formed so as to protrude outside one side edge of the glass substrates 2a and 2b.

As shown in FIG. 6, a plurality of such cell substrates 1 are formed on two laminated substrates 2A and 2B having a large area, and scribe lines (FIG. Along the line 5 (indicated by the middle broken line), it is divided by cutting by a scribe / break method. By the way, in an active matrix type liquid crystal display element using an alkali glass for a substrate, there is a concern that an alkali component from the glass may be mixed into the liquid crystal to deteriorate the liquid crystal or adversely affect the performance of a thin film transistor (TFT). The substrate B has excellent chemical resistance and heat resistance for the purpose of suppressing the thermal shrinkage of the glass itself when forming the TFT on the substrate and for considering the chemical resistance to acids and alkalis used for patterning. Alkali-free glass was selected.

[0004]

However, when dividing the combined substrates 2A and 2B into individual cell substrates 1, the quality of the divided portion where the liquid crystal introduction port 3A of the sealing material 3 is formed depends on the liquid crystal introduction. There is a difference between the opening 3A and both sides thereof, and when the margin is narrow, there is a problem that the yield is lowered due to the deterioration of the quality of the cross section on both sides of the liquid crystal inlet 3A. In particular, such a problem is likely to occur when non-alkali glass is used for the substrates 2A and 2B. There is a need to solve the above problems.

An object of the present invention is to determine what means should be taken to obtain a cell substrate having a high yield and a method of manufacturing the cell substrate, which prevent deterioration of the quality of the cross section near the liquid crystal introduction port of the sealing material. On the point.

[0006]

According to the first aspect of the present invention,
At least one is a transparent, between the opposing substrates, a sealing material is interposed so as to go around the display area, a cell substrate formed by projecting a liquid crystal introduction port in a part of the sealing material, The sealing member located on the side of the liquid crystal introduction port is formed with a protruding portion projecting outward and extending so that a tip is located near a peripheral edge of the substrate. . The invention according to claim 2 is characterized in that the glass substrate is made of non-alkali glass.

According to the first aspect of the present invention, since the sealing material on both sides of the liquid crystal introduction port is formed with a protruding portion projecting outward, when the substrate is cut by the scribe / break method, the sealing material is used. The tip of the projecting portion acts as a power point, and the division can be easily and reliably performed. For this reason, the quality of the cross section of the peripheral edge of the substrate can be improved. In particular, according to the second aspect of the present invention, it is possible to improve the yield of an active matrix cell substrate using non-alkali glass for the substrate.

According to a third aspect of the present invention, in the cell substrate according to the first aspect, a plurality of the protrusions are formed along a peripheral edge of the substrate. I do.

According to the third aspect of the present invention, since the plurality of projecting portions of the sealing material are formed along the peripheral edge (scribe line) of the substrate, the substrate is divided using the tip of the projecting portion of the sealing material as a power point. Thus, the quality of the section plane can be improved. According to a fourth aspect of the present invention, there is provided a method of manufacturing a cell substrate in which a sealing material surrounding a display area is interposed between a pair of opposing substrates at least one of which is transparent, wherein the sealing material is a liquid crystal. Forming a projecting portion projecting along a liquid crystal introduction port and a dividing line for introducing a liquid crystal panel, and dividing the substrate member along the dividing line when forming the substrate by dividing the substrate member. Method.
According to the fourth aspect of the present invention, when the substrate is formed by dividing the substrate member, the projecting portion of the sealing material is formed along the division line, so that the division can be performed satisfactorily and the yield can be reduced. Can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a cell substrate and a method of manufacturing the same according to the present invention will be described below with reference to the drawings. FIG. 1 shows a plurality of cell substrates 11 of the present embodiment,
FIG. 2 is an explanatory plan view showing a state in which the base substrates are formed on two base substrates 12A and 12B. FIG.
FIG. 4 is an explanatory plan view showing a state in which the cell substrate 11 is cut by cutting the substrate.

The cell substrate 11 of the present embodiment is composed of two large base substrates 12 made of transparent alkali-free glass.
A plurality of cell substrates 11 formed on A and 12B are divided by a scribe / break method. As is well known, common electrodes and pixel electrodes (not shown), TFTs as switching elements, alignment films, and the like are formed in the corresponding element forming regions of the base substrates 12A and 12B. Further, a sealing material 13 is formed between the alignment films formed on the opposing surfaces of both base substrates 12A and 12B so as to go around the display area of each cell substrate 11. As shown in FIG. 1, this sealing material 13
A rectangular scribe line (indicated by a broken line in the figure) that divides each element formation region of the base substrates 12A and 12B.
The liquid crystal introduction port 13A is formed so as to protrude from the substantially center of one side edge (C3) of the liquid crystal display 14. This liquid crystal inlet 13A
A plurality of protrusions 13B intermittently formed on the outer wall of the seal material 13 on both sides of the scribe line 14 so as to reach the one side edge (C3) of the scribe line 14. In the present embodiment, the interval between the protruding portions 13B is 3 to 6 mm.
And the projection 1 closest to the liquid crystal inlet 13A.
The distance to 3B is 3 mm or more.

In this embodiment, three projections 13B are formed at equal intervals on the sealing material 13 on both sides of the liquid crystal introduction port 13A, respectively, and one of the sealing materials 13 on which the liquid crystal introduction port 13A is formed is formed. Projection 1 over side edge (one side)
3B have a shape in which they are arranged substantially evenly.

As described above, the cell substrate 11 as shown in FIG. 2 is formed by dividing the scribe lines 14 of the base substrates 12A and 12B by the scribe / break method. At this time, the base substrate 12A shown in FIG.
Is divided along the vicinity of the periphery of the sealing material 13 so that the substrate 1
2a, since the base substrate 12B has a liquid crystal driving IC mounting area, the base substrate 12B is divided at two positions slightly outside from two sides of the sealing material 13, and as shown in FIG.
Becomes

Next, the base substrates 12A, 1A shown in FIG.
An example of a procedure for dividing 2B by the scribe / break method will be described. First, as shown in FIG. 1, both the base substrates 12A and 12B are cut along a cutting line C1.
After that, the wafer is cut along the cutting line C2 to be cut into individual cell substrates 11. Thereafter, only the base substrate 12A side is cut off as shown by a dashed line in FIG.
2a is formed. Further, as shown in FIG. 3, the cell substrate 11 is formed by performing division along a division line C3 overlapping with the scribe line 14 in the portion where the liquid crystal introduction port 13A on the base substrate 12B side is formed. FIG. 4 is a sectional view taken along line AA of FIG. The liquid crystal display device can be completely manufactured by appropriately arranging a polarizing plate or the like on the cell substrate 11 formed as described above.

In the cell substrate 11 of the present embodiment, since the protrusions 13B leading to the scribe line are formed on both sides of the liquid crystal introduction port 13A of the seal material 13, the stress is concentrated on the scribe line, and the sealing is performed. Lumber 13
Since the projection 13B of the first portion acts as a power point, it is possible to surely divide the scribe line at the scribe line, and to form a good quality cross section. Therefore, the cell substrate 11 can be formed with high yield. Also,
Since the liquid crystal inlet 13A protrudes from the dividing line C3 and the protruding portion 13B, the liquid crystal inlet 13A easily comes into contact with the liquid level of the liquid crystal reservoir containing the liquid crystal and is easily injected into a vacuum. For this reason, the protrusion 13B
Is hard to come into contact with the liquid crystal, so that when the liquid crystal is injected, the liquid crystal does not come around from the protruding portion 13B and does not stain the cell.

Although the embodiments have been described above, the present invention is not limited to the embodiments, and various changes accompanying the gist of the configuration are possible. For example, in the above-described embodiment, three protruding portions 13B are formed on both sides of the liquid crystal introduction port 13A of the sealing material 13, but one or more protruding portions are formed on the edge of the sealing material 13 where the liquid crystal introduction port 13A is formed. What is necessary is just a structure in which the part is formed. In the above-described embodiment, the tip of the protrusion 13B formed on the sealing material 13 is formed so as to coincide with the scribe line. However, the distance between the tip of the protrusion 13B and the scribe line is 0.1 mm. Within this range, it is possible to obtain a good quality section by the scribe / break method.

[0017]

As is apparent from the above description, according to the present invention, it is possible to improve the quality of the section of the sealing material near the liquid crystal introduction port, and to obtain a cell substrate with a high yield.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing an embodiment of a cell substrate according to the present invention and showing a state before being separated from a base substrate.

FIG. 2 is a plan view of the cell substrate of the embodiment.

FIG. 3 is an explanatory plan view showing a manufacturing process of the cell substrate according to the embodiment;

FIG. 4 is a sectional view taken along line AA of FIG. 4;

FIG. 5 is an explanatory plan view showing a conventional cell substrate.

FIG. 6 is an explanatory plan view showing a manufacturing process of a conventional cell substrate.

[Description of Signs] 11 Cell substrate 12A, 12B Base substrate 13 Sealing material 13A Liquid crystal inlet 13B Projection 14 Scribe line C1, C2, C3 Cutting line

Claims (4)

[Claims] 1. A sealing material is interposed between a pair of opposed substrates, at least one of which is transparent, so as to go around a display area, and a liquid crystal introduction port is formed so as to protrude from a part of the sealing material. A cell substrate, wherein the sealing material located on the side of the liquid crystal introduction port is formed with a protruding portion projecting outward and extending so that a tip is located near a peripheral edge of the substrate. A cell substrate, characterized in that: 2. The cell substrate according to claim 1, wherein said substrate is made of non-alkali glass. 3. The projection according to claim 1, wherein a plurality of the protrusions are formed along a peripheral edge of the substrate.
The cell substrate according to any one of the above. 4. A method for manufacturing a cell substrate in which a sealant surrounding a display area is interposed between a pair of opposed substrates at least one of which is transparent, wherein the sealant introduces a liquid crystal. A method for manufacturing a cell substrate, comprising: forming a projecting portion that protrudes along a liquid crystal introduction port and a dividing line; and dividing the substrate along the dividing line when forming the substrate by dividing a substrate member.