JPH05273562A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE:To produce the LCD having excellent reliability, durability and opera tion characteristics with high efficiency by devising a method for forming sealing patterns and tentative fixing patterns, positions of tentative fixing and procedures of stages for tentative fixing and pressurizing. CONSTITUTION:The stage (S3) for simultaneously screen-printing the sealing patterns and tentative fixing patterns on the transparent electrode forming surfaces of electrode substrates by using a UV resin or a resin mixture composed of the UV resin and a thermosetting resin, the stage (S7) for sticking the electrode substrate screen-printed with the respective patterns and another electrode substrate sprayed with spacers on the transparent electrode forming surfaces to each other by disposing the transparent electrode forming surfaces on the inner side, the stage (8) for tentatively fixing two sheets of the electrode substrates by selectively irradiating the tentative fixing patterns with resin curing light and the stage (S9) for adjusting the cell gap and the stage (S13) for curing the sealing patterns by heating are executed in this order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a liquid crystal display device (hereinafter referred to as
LCD).

[0002]

2. Description of the Related Art In LCDs, a first electrode substrate having a first transparent electrode patterned thereon and a second electrode substrate having a second transparent electrode patterned thereon are used to regulate a sealant and a cell gap. And the first and second transparent electrodes are electrically connected to each other via a transfer agent, and liquid crystal is enclosed in a space regulated by the two electrode substrates and a seal pattern. Infused.

Such an LCD is disclosed in, for example, JP-A-62-23.
As described in 1927, JP-A-1-266510, JP-A-3-157615, etc., it is usually prepared by the following method. That is, the first
Of a plurality of electrode substrates, a first master glass having a plurality of sets of first transparent electrodes and seal patterns formed on one surface, and a plurality of second electrode substrates And a plurality of sets of second transparent electrodes and transfer patterns are formed on one surface, and a second master glass on which spacer materials having a desired diameter are dispersed is prepared. With each transparent electrode forming surface inside These two master glass plates are bonded together, and the bonded master glass plates are subjected to a pressing device and pressed in the plate thickness direction to adjust the cell gap regulated by the diameter of the spacer material, while maintaining this state. The sealing agent and the transfer agent are cured to prepare a master plate having a plurality of empty cell containers, each empty cell container is cut and separated to obtain individual empty cell containers, and the empty cell containers are filled with liquid crystal. , Finally seal Sealing the liquid crystal inlet of the turn to give the desired LCD.

By the way, as a sealant for forming the seal pattern, a thermosetting resin such as an epoxy resin has been widely used from the past because of its strong adhesive strength. However, workability has been improved in recent years. For this reason, or in order to reduce the thermal effect on the electrode substrate and the like, an ultraviolet curable resin or a mixed resin of an ultraviolet curable resin and a thermosetting resin has been proposed.

When an ultraviolet-curable resin or a mixed resin of an ultraviolet-curable resin and a thermosetting resin is used as the sealant, the resin-curing light is kept while maintaining the cell gap of the laminated master glass at a predetermined value. It is very difficult in manufacturing to uniformly irradiate the whole of the seal pattern. Therefore, when the ultraviolet curable resin or the mixed resin thereof is used as the sealing agent, a step of temporarily fixing the master glass is required.

The method of temporarily fixing the master glass is as follows: (1) For example, JP-A-62-131224 and JP-A-62-132224.
As described in Japanese Patent No. 231,927, after pressurizing two master glass plates to adjust the cell gap,
A method of temporarily irradiating a part of the seal pattern with resin curing light, and (2) for example, as described in JP-A-4-11223, pressurize two master disks to adjust the cell gap. After that, a method of applying an ultraviolet curable resin to the outer two positions of the seal pattern and irradiating it with resin curing light to temporarily fix the resin (3), for example, Japanese Patent Laid-Open No. 1-2665.
As described in Japanese Patent Publication No. 10, a method of irradiating resin curing light on a part of the seal pattern to temporarily fix it and then pressurizing two master glass plates to adjust the cell gap, and (4) one After printing the seal pattern on the electrode substrate of, the ultraviolet curable resin is spotted on the transparent electrode formation surface of the one electrode substrate by using a coating device such as a dispenser, and after the master glass is laminated, the spots are spotted. There is also known a method of irradiating the ultraviolet curable resin with resin curing light to temporarily fix the resin, and then pressing the master glass in the plate thickness direction to adjust the cell gap.

[0007]

However, in the methods (1) and (2) of the temporary fixing method of the master glass, the cell gap of the master glass is adjusted before the temporary fixing.
There is a problem that the master glass tends to be laterally displaced during pressurization, and the alignment accuracy is likely to deteriorate. In addition to the above
The method (2) requires a step of printing a seal pattern and a step of applying an ultraviolet curable resin for temporary fixing, which complicates the manufacturing process of the LCD and increases the cost of the LCD. There is also a problem.

In the method (3), since a part of the seal pattern is temporarily fixed and then the cell gap of the master glass is adjusted, it is difficult for the seal pattern to be uniformly deformed at the time of pressurization, resulting in uneven cell gap. There is a problem that it is easy. Therefore, such a method cannot be applied to the manufacture of an LCD such as an STN active matrix LCD that requires a gap accuracy of ± 0.05 μm or less.

The above method (4) requires a step of printing a seal pattern and a step of applying a UV-curable resin for temporary fixing, which complicates the manufacturing process of the LCD, and dispensers and the like. In the coating device, it is difficult to spot a certain amount of the ultraviolet curable resin on the master glass, so the desired cell gap accuracy cannot be obtained because the coating amount is too large, or on the contrary, the coating amount is too small. It is easy to cause inconvenience that desired temporary fixing strength cannot be obtained.

The present invention has been made in order to solve the deficiency of the prior art, and its object is to provide a method for efficiently producing an LCD having a high cell gap accuracy.

[0011]

In order to achieve the above-mentioned object, the present invention provides a method for producing a liquid crystal display device using an ultraviolet curable resin or a mixed resin of an ultraviolet curable resin and a thermosetting resin. Screen printing a seal pattern and a temporary fixing pattern on the transparent electrode forming surface of the electrode substrate at the same time, and an electrode substrate on which the seal pattern and the temporary fixing pattern are screen-printed, and the other electrode substrate having spacers scattered on the transparent electrode forming surface And a transparent electrode formation surface inside, and a step of selectively irradiating the temporary fixing pattern with resin curing light to temporarily fix the two electrode substrates, and the two electrode substrates. It was configured to include a step of applying pressure in the plate thickness direction to adjust the cell gap and a step of heat-curing the seal pattern.

The film thickness of the temporary fixing pattern is preferably larger than the film thickness of the seal pattern in order to prevent misalignment during bonding. The seal pattern and the temporary fixing pattern are screen-printed in order to obtain a seal excellent in reliability and durability.
Before bonding the electrode substrates, it is preferable to irradiate infrared rays to defoam bubbles contained in the pattern. Further, in order to improve the productivity of the LCD, the cell gap adjustment and the curing of the seal pattern are performed on the same stage, and after the seal pattern is cured, the cell gap is measured in the next step, and the gap defect is detected. When is found, it is preferable to configure the manufacturing process so that the manufacturing line of the liquid crystal display element is immediately stopped. Further, in order to prevent stringing of the resin material at the time of printing and forming the seal pattern and the temporary fixing pattern and to improve the yield of non-defective products, the screen printing device has a conductive plate frame and a screen net, It is preferable to use one in which both these members are grounded. Further, in order to shorten the curing time of the ultraviolet curable resin, it is preferable to use an electrodeless lamp as a light source for curing the ultraviolet curable resin. Furthermore, in order to obtain a seal pattern with less disorder, it is preferable to pressurize the two electrode substrates slowly, and it takes 30 seconds to 6 seconds from the start of pressurization until the predetermined maximum pressure is reached.
It is particularly desirable to take a time of 0 seconds.

[0013]

When the seal pattern and the temporary fixing pattern are formed by screen printing once, the manufacturing process is simplified and the manufacturing efficiency is improved as compared with the case where the respective patterns are formed separately. Further, when the film thickness of the temporary fixing pattern is made larger than the film thickness of the seal pattern, the temporary fixing pattern surely adheres to the master glass and reliable temporary fixing can be performed.
It should be noted that if the film thickness of the temporary fixing pattern is set appropriately and the position where the temporary fixing pattern is formed is set sufficiently far from the position where the seal pattern is formed, the cell gap will not become uneven. Further, when the temporary fixing pattern is formed by screen printing, the uniformity of the applied amount can be markedly improved as compared with the case where a dispenser is used, and no inconvenience due to an excessive or insufficient applied amount occurs. Furthermore, since the cell gap of the master glass is adjusted after the temporary fixing, the alignment accuracy does not deteriorate when the pressure is applied.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the structure of an LCD according to the present invention will be described with reference to FIGS.
It will be described with reference to FIG. FIG. 1 is a plan view of an LCD according to the present invention, FIG. 2 is a developed view of the LCD according to the present invention, and FIG. 3 is a cross-sectional view of an essential part of the LCD according to the present invention.

In these figures, 1 is a first electrode substrate, 2 is a first transparent electrode patterned on one side of the electrode substrate 1, 3 is a second electrode substrate, and 4 is on one side of the electrode substrate 3. The patterned second transparent electrode, 5 is a seal pattern, 6 is a transfer pattern, 7 is a liquid crystal, and 8 is a sealing stopper. As is clear from these figures, in the LCD of this example, the transparent electrode formation surfaces of the two electrode substrates 1 and 3 are bonded together via the seal pattern 5 and are formed on the respective electrode substrates 1 and 3. The transparent electrodes 2 and 4 are connected via a transfer pattern 6. Further, the liquid crystal 7 is filled in the space regulated by the two electrode substrates 1 and 3 and the seal pattern 5, and the injection port of the liquid crystal 7 is sealed by the sealing plug 8.

It should be noted that, as shown in FIG.
A first master glass 9 having a size of a plurality of first electrode substrates 1 and having a plurality of sets of first transparent electrodes 2 and seal patterns 5 formed on one surface thereof, and a second electrode substrate 3 Second master glass 1 having a size corresponding to a plurality of pairs of second transparent electrodes 4 and transfer patterns 6 formed on one side thereof.
0 is produced, and these are laminated to produce a master having a plurality of empty cell containers, and each empty cell container is cut and separated to obtain individual empty cell containers. Then, alignment marks 11 and 12 for aligning the two master disks 9 and 10 are formed on the first and second master glasses 9 and 10 at diagonally opposite positions, and the first master glass 9 is also provided. 9 is formed with a temporary fixing pattern 13 for temporarily fixing both master glass plates in the other diagonal direction. Alignment mark 1
In order to improve the positioning accuracy, it is preferable that 1 and 12 are provided as close to the peripheral edge of the master glass 8 and 9, respectively.
Further, in order to improve the positioning accuracy, the temporary fixing pattern 13 is provided as close to the peripheral edge portions of the master glass sheets 8 and 9 as possible,
In addition, it is preferable to provide it at a position separated from the alignment marks 11 and 12. The temporary fixing pattern 13
Is formed to be thicker than the seal pattern 5 and the transfer pattern 6, and the transfer pattern 6 is formed to be thicker than the seal pattern 5. This ensures that the respective parts are bonded together.

As the sealant and the temporary fixing pattern agent, a mixed resin of an ultraviolet curable resin and a thermosetting resin is used. Specifically, the ratio of the modified acrylate oligomer to the epoxy oligomer is (90:10) to (40:60), and more preferably (70:30) to (50:50).
It is possible to use a mixture of these. When this composition is used, the heating temperature in the heating step is 11
The epoxy resin 1 can be set to about 0 ° C to 120 ° C.
It is the optimum heating temperature when using a sealant of 00% 1
The heating temperature can be lowered by 40 ° C to 60 ° C as compared with 60 ° C to 180 ° C. Therefore, the alignment accuracy at the time of bonding the electrode substrates is improved, and the warpage due to the temperature difference between the two electrode substrates is reduced. Furthermore, the change in the pretilt angle of the STN, which is easily affected by the temperature, is reduced, and the display unevenness is reduced.

A reactive diluent is added to the mixed resin in an amount of 1 to 30% by weight, preferably 2 to 10% by weight, based on 100 parts by weight of the oligomer, and an epoxy curing agent is added to 100 parts by weight of the oligomer. 2 to 30% by weight, more preferably 5 to 25% by weight, and the photopolymerization initiator is the oligomer 1
0.1 to 10% by weight, more preferably 0.5 to 4% by weight, is added to 00 parts by weight. The photopolymerization initiator has a wavelength of 360 nm to 430 n within the above-mentioned addition amount range.
It is preferable to absorb m ultraviolet rays (peak of spectrum of metal halide lamp) with high efficiency. Specific examples of this type of photopolymerization initiator include a thioxanthone photopolymerization initiator represented by the chemical structural formula of FIG. 5 or an acylphosphine oxide photopolymerization initiator represented by the chemical structural formula of FIG. is there.

Further, in order to improve the adhesive strength and alleviate the adhesive stress, a filler can be added to the above-mentioned mixed resin. The filler preferably has a spherical shape with a diameter of about 0.5 μm to 1.1 μm in order to prevent secondary aggregation and prevent the seal pattern 5 and the temporary fixing pattern 13 from being disturbed. Spherical silica of diameter is preferred. The silane treatment of the filler
0.5 to 3.0% by weight of a silane coupling agent is put into a volatile solution such as alcohol to dissolve the silane coupling agent, and a filler is put into this solution and left for about 1 hour. Then about 10
It can be carried out by a method of heating to 0 ° C. to skip the solution and coating (bonding) the surface of the filler with a silane coupling agent. The addition amount of the filler to the resin amount is appropriately up to about 35%.

Further, in order to relieve the thermal stress of the seal pattern 5 and prevent the seal pattern 5 from cracking, a reactive elastic material such as a butadiene modified epoxy resin may be added to the above mixed resin. Also, after product assembly,
Insulating carbon powder may be added to the mixed resin in order to prevent light leakage from the seal pattern portion of the LCD panel. The particle size of carbon powder is 1.5 μm
The following is more preferable, 0.5 to 1.0 μm is preferable, and the amount of carbon powder added to the mixed resin is 0.1 to 2.9.
%, And more preferably about 0.1 to 0.5% by weight. The sealant and the temporary fixing pattern agent have a TI value of 1.2 to 1.5 and a viscosity of 20 in order to obtain good printability.
It is adjusted to about 000 to 50,000 cps.

FIG. 7 shows a more preferable composition example of the sealant and the temporary fixing pattern agent.

An example of the method of manufacturing the LCD will be described below with reference to FIGS. 1 to 4 and FIG. Figure 8
FIG. 7 is a manufacturing process explanatory view showing a flow of the LCD manufacturing process.

In step S1, a plurality of sets of first transparent electrodes 2 are patterned on the first master glass 8 on which the alignment marks 10 are displayed (see FIG. 4).

In parallel with this, in step S2,
A plurality of sets of second transparent electrodes 4 are pattern-formed on the second master glass 9 on which the alignment marks 11 are displayed (see FIG. 4).

In step S3, a plurality of sets of seal patterns 5 and temporary fixing patterns 13 are formed on the first master glass 8.
And screen print.

In parallel with this, in step S4,
The transfer pattern 6 is patterned on the second transparent electrode 4 patterned on the second master glass 9.

Pattern formation of the transparent electrodes 2 and 4, the seal pattern 5, the temporary fixing pattern 13 and the transfer pattern 6 in each of the above steps is carried out with reference to the alignment marks 10 and 11 displayed on the master glass 8 and 9, respectively. Be seen. The seal pattern 5 and the temporary fixing pattern 1
3. The printing device for the transfer pattern 6 will be described in detail later with reference to FIGS.

In step S5, the seal pattern 5 and the temporary fixing pattern 13 formed on the first master glass 8 and the transfer pattern 6 patterned on the second master glass 9 are irradiated with infrared rays so that the resin Remove the air bubbles. Since the UV curable resin contains an acrylic-modified monomer, air bubbles are easily trapped during printing, and defoaming treatment is essential. When infrared rays are used as the heat source, the defoaming process can be completed in a short time because they are easily absorbed by the resin. For example, in the heating in the furnace, the defoaming treatment that was required at 40 ° C. for 5 minutes can be completed in 30 seconds by using infrared rays.

In step S6, a spacer material having a diameter corresponding to a desired cell gap is sprinkled on one master glass plate 9. The spacer material can be sprayed by spraying nitrogen gas with a spacer material added to a mixed solution of freon and isopropyl alcohol.

In step S7, the original master glasses 8 and 9 are aligned with the transparent electrodes 2 and 4 forming surface inside and the alignment marks 10 and 11 displayed on the respective master master glasses 8 and 9 are aligned. Position (align). At this time, the alignment adjustment can be performed without affecting the seal pattern 5 and the transfer pattern 6 by selectively pressing only the temporary fixing pattern 13 forming portion of the master glass 8 or 9.

In step S8, the temporary fixing pattern 1
Irradiate the resin hardening light to the adhesive portion of 3 to temporarily fix the pattern 13.
Is cured to temporarily fix the master glass plates 8 and 9.

In step S9, the pressing device for adjusting the cell gap, especially foreign matter such as glass powder adhered to the pressed portion is removed. This is to prevent the master glasses 8 and 9 from breaking due to a local force acting on the master glasses 8 and 9 during pressurization. The foreign matter can be removed by using an adhesive roller or the like. It should be noted that this operation can be executed only when there is a foreign substance by monitoring the presence or absence of the foreign substance with a CCD camera or the like. In addition, a static elimination blower should be attached to the press machine, or conductive particles should be applied to the diaphragm part of the press machine to prevent the machine from being charged, and as a result, foreign matter such as glass powder should not adhere to the press machine. You can also

In step S10, the temporarily fixed master glass plates 8 and 9 are mounted on the press machine. A resin curing light irradiation device is incorporated in this pressing device. Then, the temporarily fixed master glasses 8 and 9 are pressed in the contact direction to adjust the cell gap, and then resin curing light is irradiated at the same stage to irradiate the ultraviolet curing resin contained in the seal pattern 5 and the transfer pattern 6. To cure. When pressing, the pressing force applied to the master glass 8 and 9 is 0.1k.
Gently pressurize from g / cm ² to about 1.0 kg / cm ² for 30 to 60 seconds. By doing so, the line width of the seal pattern 5 becomes uniform, liquid crystal leakage is prevented, and the reliability of the LCD is improved. In particular, it is effective for an ultra-compact LCD such as a camera LCD in which the area occupied by the seal pattern 5 is relatively large with respect to the LCD area. FIG. 9 shows a seal pattern when pressed by the above pressing method and a seal pattern when pressed at a higher speed than that. FIG. 9A shows the product of the present invention,
FIG. 9B shows a conventional product. However, both samples had a sealing agent film thickness of 20 μm and a spacer diameter of 5.8 μm, and were subjected to heating leveling at 80 ° C. for 3 minutes after printing.

As a light source of resin curing light, a high pressure mercury lamp,
In addition to mercury discharge lamps such as ultra-high pressure mercury lamps and metal halide lamps, electrodeless lamps can be used. Compared with mercury discharge lamps, electrodeless lamps have higher UV output efficiency (about 36.5%; mercury discharge lamps have about 14%).
%), The infrared output efficiency is low, so the master glass 8
9 has the advantages of being able to control the temperature rise, have a long life, do not require electrical connection, can be easily attached to and detached from the press device, and can be quickly started up. It is more suitable.

In step S11, the master glass 8 and 9 whose cell gap has been adjusted is transferred to a cell gap measuring device to measure the cell gap. And step S1
In 2, it is determined whether the cell gap is within the design value. When it is determined in step S12 that the cell gap is within the design value, the process proceeds to step S13. When it is determined in step S12 that the cell gap is out of the design value, the process proceeds to step S14, a warning is issued, and the line is stopped. In this way, compared to the case where the cell gap is measured after filling the liquid crystal, it is possible to take a quick countermeasure against the defect and reduce the defect occurrence rate.

In step S13, the master glass 8,
9 is applied to a pressure-heating device to cure the thermosetting resin contained in the seal pattern 5 and the transfer pattern 6. At this time, it is preferable to insert an electrically conductive interleaving paper between the pressing portion of the pressure-heating device and the master glass 8 or 9 to prevent the master glass 8 or 9 from being charged. By doing so, it is possible to prevent the deflection abnormality of the liquid crystal due to the charging, that is, the inconvenience that an abnormal horizontal line or vertical line is displayed on the LCD as a product.

Finally, in step S15, the individual empty cell containers are divided, the liquid crystal 7 is filled into the empty cell containers, and the liquid crystal injection port is sealed in accordance with the conventional method, and the LCD shown in FIG. obtain.

An example of a printing apparatus used for forming a pattern such as the seal pattern 5 will be described with reference to FIGS.
As is apparent from FIGS. 10 to 12, the printing apparatus of this example has a plate frame 21, a screen net 22 stretched over the plate frame 21, and a squeegee 24 for applying the mixed resin 23.
It consists of and. The plate frame 21 and the screen net 22 are made of a conductive material. And
As shown in detail in FIG. 11, the plate frame 21 and the screen net 22 are electrically connected via a conductive tape 25, and the plate frame 21 is grounded via a ground wire 26. As described above, when the antistatic printing device is used, the mixed resin 23 is prevented from being charged, and the stringing of the mixed resin is less likely to occur, so that the printing error is reduced. FIG. 12 shows the effect of the grounding mechanism when various materials are used for the screen net 22. As is clear from this figure, if the screen net 22 is made of metal (stainless steel) or metal masked and is equipped with a grounding mechanism, the electrostatic amount of the screen net 22 can be reduced to 100 volts, and the electrostatic charge of the screen net 22 can be reduced. It can be seen that the inconvenience caused by can be completely prevented.

As described above, the temporary fixing pattern 1
3 is formed thicker than the seal pattern 5 and the transfer pattern 6, and the transfer pattern 6 is formed thicker than the seal pattern 5. In this way, when printing patterns having different thicknesses on the same master glass, as shown in FIG. 13, the thickness of the perforated resist film 27 formed on the screen net 22 is reduced. This can be dealt with by making the pattern forming portion thin and making the pattern thick portion thick. Specifically, the resist film 2 in the seal pattern forming portion
By setting the thickness d _{1 of} 7 to 6 to ₁₀ μm, the seal pattern 5 having the thickness can be formed, and the thickness d ₂ of the resist film 27 in the temporary fixing pattern forming portion can be set to ₂ to 5 μm.
The temporary fixing pattern 13 having the thickness can be formed by increasing the thickness by μm. In this way, when the seal pattern 5 and the temporary fixing pattern 13 having different thicknesses are formed by screen printing once, it is possible to form the temporary fixing pattern on the master glass using a dispenser or the like after forming the seal pattern. The manufacturing efficiency is remarkably improved as compared with the case of using the means. Further, when the temporary fixing pattern 13 is formed by screen printing, the uniformity of the applied amount can be markedly improved as compared with the case where a dispenser is used, and therefore the applied amount is too large to obtain a desired cell gap accuracy. Alternatively, there is no inconvenience that the desired temporary fixing strength cannot be obtained because the coating amount is too small.

[0040]

As described above, according to the present invention,
Since the seal pattern and the temporary fixing pattern are formed by screen printing once, the manufacturing process is simplified and the manufacturing efficiency is improved as compared with the case where the respective patterns are formed separately. Further, since the film thickness of the temporary fixing pattern is made larger than the film thickness of the seal pattern, the temporary fixing pattern surely adheres to the master glass, and reliable temporary fixing can be performed. Further, since the temporary fixing pattern is formed by screen printing, the uniformity of the applied amount can be markedly improved as compared with the case where a dispenser or the like is used, and no inconvenience due to an excessive or insufficient applied amount occurs. Furthermore, since the cell gap of the master glass is adjusted after the temporary fixing, the alignment accuracy does not deteriorate when the pressure is applied. Therefore, an LCD having excellent reliability, durability and operating characteristics can be manufactured with high efficiency.

[Brief description of drawings]

FIG. 1 is a plan view of an LCD according to an embodiment.

FIG. 2 is a development view of an LCD according to an embodiment.

FIG. 3 is an exploded cross-sectional view of a main part of the LCD according to the embodiment.

FIG. 4 is a development view of a master glass according to an example.

FIG. 5 is an explanatory diagram showing a chemical structural formula of a thioxanthone photopolymerization initiator.

FIG. 6 is an explanatory diagram showing a chemical structural formula of an acylphosphine oxide photopolymerization initiator.

FIG. 7 is an explanatory diagram showing a composition example of a preferable sealant and temporary fixing pattern agent.

FIG. 8 is a flowchart showing an LCD manufacturing method.

FIG. 9 is an explanatory diagram of a seal pattern.

FIG. 10 is a cross-sectional view of the printing apparatus.

FIG. 11 is a cross-sectional view of a main part of the printing apparatus.

FIG. 12 is an explanatory diagram illustrating effects of the printing apparatus according to the embodiment.

FIG. 13 is a main-portion cross-sectional view showing an example of a resist film formed in a printing apparatus.

[Explanation of symbols]

 1,3 Electrode substrate 2,4 Transparent electrode 5 Seal pattern 6 Transfer pattern 7 Liquid crystal 8 Sealing plug 9,10 Master glass 11,12 Alignment mark 13 Temporary fixing pattern

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hisao Kimura 1-7 Yukitani Otsuka-cho, Ota-ku, Tokyo Alps Electric Co., Ltd. (72) Inventor Tsutomu Katayose 1-7 Yutaya-Otsuka-cho, Ota-ku, Tokyo Su Electric Co., Ltd.

Claims (8)

[Claims] 1. A step of simultaneously screen-printing a seal pattern and a temporary fixing pattern on a transparent electrode formation surface of an electrode substrate using an ultraviolet curable resin or a mixed resin of an ultraviolet curable resin and a thermosetting resin, a seal pattern, and A step of bonding an electrode substrate on which the temporary fixing pattern is screen-printed and the other electrode substrate on which a transparent electrode forming surface is sprayed with spacers with the transparent electrode forming surface inside, selectively curing resin light to the temporary fixing pattern. And tentatively fixing the two electrode substrates to each other, pressurizing the two electrode substrates in the plate thickness direction to adjust the cell gap, and heat curing the seal pattern. And a method for manufacturing a liquid crystal display device. 2. The method for manufacturing a liquid crystal display element according to claim 1, wherein the film thickness of the temporary fixing pattern is made larger than the film thickness of the seal pattern. 3. The method according to claim 1, wherein after the seal pattern and the temporary fixing pattern are screen-printed and before the electrode substrate is attached, each pattern is irradiated with infrared rays to remove bubbles contained in the pattern. A method for manufacturing a liquid crystal display device, which comprises performing bubble treatment. 4. The method of manufacturing a liquid crystal display element according to claim 1, wherein the adjustment of the cell gap and the curing of the seal pattern are performed on the same stage. 5. The method according to claim 1, wherein after the seal pattern is cured, the cell gap is measured in the next step,
A method of manufacturing a liquid crystal display device, which comprises immediately stopping the manufacturing line of the liquid crystal display device when a gap defect is found. 6. The screen printing device according to claim 1, which has a conductive plate frame and a screen net, and both members are grounded, as a screen printing device for printing and forming the seal pattern and the temporary fixing pattern. A method for manufacturing a liquid crystal display element, comprising: 7. The method of manufacturing a liquid crystal display element according to claim 1, wherein an electrodeless lamp is used as a light source for curing the ultraviolet curable resin forming the seal pattern and the temporary fixing pattern. 8. The time from the start of pressurization of the two electrode substrates in the cell gap adjusting step to the reaching of a predetermined maximum pressure in the cell gap adjusting step is set to 30 to 60 seconds. A method for manufacturing a liquid crystal display element, comprising: