JP2003336068A - Common transition material, liquid crystal panel and manufacturing method of liquid crystal panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a common transition material capable of improving reliability of a liquid crystal panel, a liquid crystal panel using it, and a manufacturing method of the liquid crystal panel. <P>SOLUTION: The common transition material, which is used for a common transition electrode 101 disposed between the electrodes formed adjacently to each inside of a pair of substrates opposed each other, is characterized by containing a photocurable resin 102 and a conductive particle 103 and by containing a non-conductive filler only in 1 part by mass or less to 100 parts by mass of the photocurable resin 102. The liquid crystal panel using the above common transition material and its manufacturing method are also provided. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common transition material used for a common transition electrode provided between electrodes of two substrates, a liquid crystal panel using the same, and a method for manufacturing the liquid crystal panel.

[0002]

2. Description of the Related Art FIG. 10 shows a sectional structure of a conventional liquid crystal panel. In a conventional liquid crystal panel 400 shown in FIG. 10, a color filter substrate 405 and an array substrate 406 are installed to face each other with a liquid crystal layer 411 in between, and these substrates are bonded together by a sealant 412. The color filter substrate 405 and the array substrate 40
6 to the liquid crystal layer 411 side, transparent electrodes 407 and 40, respectively.
8 is formed. Then, the transparent electrodes 407 and 408
The common transfer electrode 4 containing the conductive particles 403 and the non-conductive inorganic filler 404 in the photocurable resin 402 between
01 is installed. Previously, the external connection terminals were installed on both the color filter substrate 405 and the array substrate 406, but in recent years, the external connection terminals are installed only on the array substrate 406 side for reasons such as simplification of wiring.
Therefore, the current flows through the transparent electrode 408 of the array substrate 406.
Current flows into the color filter substrate 40 through the conductive particles 403 in the common transition electrode 401.
No. 5 transparent electrode 407.

FIG. 11 shows a method of manufacturing this conventional liquid crystal panel.
~ It demonstrates below using FIG. First, as shown in FIG. 11, a color filter substrate 405 and an array substrate 40.
6 are prepared, the common transition electrode 401 is installed on the color filter substrate 405, and the sealing material 412 is installed on the array substrate 406. The color filter substrate 405 and the array substrate 406 are large-sized, and a plurality of sealing materials 412 are formed on the array substrate 406. Here, as shown in FIG. 11, the sealing material 41 formed on the array substrate 406.
Before injection of the liquid crystal, the reference numeral 2 is not a completely closed ring, but is formed in a shape in which one position of the sealing material 412 is opened as a liquid crystal injection port.

Next, the color filter substrate 405 and the array substrate 406 are bonded together and heated to cure the sealant 412 and the common transfer electrode 401. After that, the substrates are collectively cut into individual regions surrounded by the sealant 412 to obtain a bonded substrate 415 shown in FIGS. 12 and 13. Then, the bonded substrate stack 415 is housed in a vacuum device, and the inside and outside of the space surrounded by the sealing material 412 are both evacuated. In that state, as shown in FIG. 14, the liquid crystal inlet 416 is connected to the liquid crystal 411a.
And gradually return the inside of the vacuum device to atmospheric pressure. Then, the liquid crystal 411a is injected into the space surrounded by the sealant 412 due to the pressure difference between the inside and outside of the space and the capillary phenomenon. Finally, as shown in FIG. 15, after the liquid crystal 411a is injected, the liquid crystal injection port is sealed with a sealing material 417, and a polarizing plate is attached to the substrate to obtain a liquid crystal panel 400.

[0005]

However, as shown in FIG.
As shown in FIG. 6, the photo-curable resin 402 used for the common transfer electrode 401 of the conventional liquid crystal panel is provided with a non-conductive inorganic filler 404 in order to alleviate shrinkage of the resin due to heating at the time of bonding the substrates. Curable resin 402-10
Since it is mixed in an amount of 10 to 30 parts by mass with respect to 0 parts by mass, the non-conductive inorganic filler 404 is sandwiched between the conductive particles 403 and the electrode 407 or the electrode 408 when the substrates are bonded together. There is a problem that the reliability of the liquid crystal panel is lowered in many cases.

In view of the above circumstances, it is an object of the present invention to provide a common transition material capable of improving the reliability of a liquid crystal panel, a liquid crystal panel using the same, and a method of manufacturing the liquid crystal panel.

[0007]

In order to achieve the above object, the inventors of the present invention have considered that the non-conductive filler such as an inorganic filler should be removed from the common-transition material used for the common-transition electrode as much as possible. I came to think of. That is, the present invention is a common transition material used for a common transition electrode provided between electrodes formed adjacent to each other inside a pair of opposed substrates, and the common transition material is a photo-curable type. Including resin and conductive particles,
The non-conductive filler is a common transition material containing only 1 part by mass or less with respect to 100 parts by mass of the photocurable resin.

In the common transfer material of the present invention, the viscosity of the photocurable resin before curing is 100,000.
It is preferably ˜500,000 Pa · s.

In the common transfer material of the present invention, it is recommended that the conductive particles are contained in an amount of 0.2 to 5 parts by mass with respect to 100 parts by mass of the photocurable resin.

In the common transfer material of the present invention, it is desirable that the average particle diameter of the conductive particles is 100 to 110% of the distance between the electrodes formed on the substrate. Here, the compression modulus of the conductive particles is 200 to 4
More preferably, it is within the range of 00 kg / mm ² .

Further, in the common transfer material of the present invention, the surface of the conductive particles may have protrusions protruding toward the outside of the conductive particles. Here, the height of the protrusions is more preferably 0.05 to 5% of the average particle diameter of the conductive particles.

The common transition material of the present invention may contain conductive fine particles having an average particle size smaller than that of the conductive particles. Here, it is preferable that the conductive fine particles are contained in an amount of 0.2 to 20 parts by mass with respect to 100 parts by mass of the photocurable resin.

Further, according to the present invention, a first substrate and a second substrate provided on the first substrate via a liquid crystal layer are provided.
A liquid crystal panel including a sealant provided so as to surround a liquid crystal layer between a first substrate and a second substrate, wherein an electrode formed on the liquid crystal layer side of the first substrate and a second substrate The liquid crystal panel is characterized in that a common transition electrode using the above-mentioned common transition material is provided between the liquid crystal panel and the electrode formed on the liquid crystal layer side.

In the present invention, a step of preparing a pair of substrates and forming a common transition electrode using the above-mentioned common transition material on the upper surface of at least one of these substrates, and at least one of these substrates. A step of forming a plurality of closed frame bodies as a sealing material on the upper surface, a step of injecting liquid crystal by dropping liquid crystal into each of the plurality of closed frame bodies, a step of adhering these substrates, and a step of adhering these The present invention relates to a method for manufacturing a liquid crystal panel, which includes a step of collectively attaching a polarizing plate on a combined substrate and a step of collectively dividing the substrate to which the polarizing plate is attached into a plurality of liquid crystal panels.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

(Common Transition Material) The common transition material used in the present invention contains a photocurable resin and conductive particles.
The non-conductive filler is contained in an amount of 1 part by mass or less, preferably 0.5 part by mass or less, based on 100 parts by mass of the photocurable resin. This is because when the content of the non-conductive filler is more than 1 part by mass, the electric resistance between the common transition electrode and the electrode installed on the substrate is significantly increased, and the reliability of the liquid crystal panel is drastically increased. This is because the present inventors have found that it will decrease.

FIG. 1 shows a schematic conceptual view of a preferred example of a common transition electrode using the common transition material of the present invention.
In FIG. 1, the common transfer electrode 101 has a configuration in which the photo-curable resin 102 contains the conductive particles 103 and does not contain a non-conductive filler such as an inorganic filler. Therefore, when the common transition electrode as shown in FIG. 1 is used, a non-conductive filler such as an inorganic filler is not sandwiched between the electrode and the conductive particles as in the conventional case, so that the liquid crystal panel Will be able to improve the reliability of. Examples of the non-conductive filler include calcium carbonate, barium sulfate, alumina, silica, talc, magnesium oxide or zinc oxide.

(Photocurable Resin) As the photocurable resin used in the present invention, a conventionally known one is used, for example, an acrylic resin, an alkyd resin or an unsaturated polyester resin having a polymerizable unsaturated group introduced therein. Can be used. The viscosity of the photo-curable resin before curing is 100,0.
It is preferably from 00 to 500,000 Pa · s.
In this case, since sufficient pressure can be applied between the substrates on which the electrodes are formed, the electrodes and the conductive particles can be sufficiently brought into contact with each other, so that the reliability of the liquid crystal panel is improved. It can be improved.

(Conductive Particles) The conductive particles used in the present invention may be, for example, metal particles, plastic particles plated with metal, or a mixture thereof. Among them, as the conductive particles, it is preferable to use plastic particles plated with gold. In this case, since the electroconductivity of the electroconductive particles is improved, the reliability of the liquid crystal panel tends to be further improved. Further, the manufacturing cost can be further reduced as compared with the case where gold particles are used. Here, the term "conductivity" means that, for example, a certain material is a cube of 1 cm square, and the electric resistance value when a voltage is applied to both end surfaces thereof is less than 10 Ω. The electric resistance value of the conductive particles is more preferably 2Ω or less.

The conductive particles are preferably contained in an amount of 0.2 to 5 parts by mass with respect to 100 parts by mass of the photocurable resin. If the content of the conductive particles is less than 0.2 parts by mass, the conduction of current between the electrodes cannot be sufficiently achieved and the reliability of the liquid crystal panel tends to be lowered. Although the number of contacts between the conductive particles increases, the number of contacts between the conductive particles also decreases significantly due to the thermal shock when the liquid crystal panel is aged, so the electrical resistance between the electrodes formed on the substrate before aging It tends to rise compared to.

The average particle diameter of the conductive particles is preferably 100 to 110% of the distance between the electrodes formed on the substrate. In this case, the conductive particles and the electrodes formed on the substrate can be sufficiently brought into contact with each other, so that the electric resistance between the electrodes tends to be further lowered, and the reliability of the liquid crystal panel is further improved. Tend to do.

When the average particle diameter of the conductive particles is 100 to 110% of the distance between the electrodes formed on the substrate, the conductive particles have a compressive elastic modulus of 200 to 400 kg.
It is preferably in the range of / mm ² . In this case, since the electrode and the conductive particles can be sufficiently brought into contact with each other because the balance between the pressure applied from the electrode to the conductive particles and the repulsive force applied from the conductive particles to the electrode is excellent, The electric resistance between the electrodes can be further reduced, and the reliability of the liquid crystal panel can be further improved.

Further, it is also possible to form on the surface of the conductive particles projections protruding toward the outside of the conductive particles. FIG. 2 shows a schematic cross-sectional view of an example of the common transition electrode using the common transition material containing the conductive particles having the protrusions. As shown in FIG. 2, a plurality of protrusions 209 formed on the common transfer electrode 201 are formed on the surface of the conductive particles 203, and the protrusions 209 project to the outside of the conductive particles 203. With the conductive particles having such a structure, a plurality of protrusions 20 can be formed as shown in FIG.
Since 9 can contact the electrode 207 or the electrode 208, conductivity between the electrode 207 and the electrode 208 is improved,
The reliability of the liquid crystal panel can be improved. The protrusion 20
9 is produced by a conventionally known method. For example,
Produced by forming unevenness on the surface of particles such as plastic and plating the uneven surface with metal, or by coating the surface of a conductive substance such as metal with a conductive substance finer than the conductive substance Can be done.

Here, the height of the projection 209 is preferably 0.05 to 5.0% of the average particle diameter of the conductive particles. The height of the protrusion is 0.0 of the average particle diameter of the conductive particles.
If it is less than 5%, the projections are too short and the effect of forming the projections is not sufficiently obtained, so that the reliability of the liquid crystal panel tends to be deteriorated. Since the conductive particles cannot be brought into sufficient contact with the formed electrode, the reliability of the liquid crystal panel tends to decrease. The height of the protrusion 209 refers to the distance h from the surface S in contact with the surface of the conductive particle 203 to the longest height of the protrusion 209 as shown in FIG.

Conductive fine particles having an average particle size smaller than that of the conductive particles may be included in the resin composition. FIG. 4 shows a schematic cross-sectional view of an example of the common transfer material of the present invention including the conductive fine particles. As shown in FIG. 4, the conductive fine particles 310 are included in the common transition material 301 together with the conductive particles 303. With such a structure, the plurality of conductive fine particles 310 can be in contact with the electrode 307 or the electrode 308 as illustrated in FIG. 4, so that the conductivity between the electrode 307 and the electrode 308 is improved and the liquid crystal The reliability of the panel can be improved.

The amount of the conductive fine particles to be blended is preferably 0.2 to 20 parts by mass with respect to 100 parts by mass of the photocurable resin. When the amount of the conductive fine particles is less than 0.2 parts by mass, the amount of the conductive fine particles present between the conductive particles and the electrode installed on the substrate tends to be insufficient, and the reliability of the liquid crystal panel tends to decrease. If the amount is more than 20 parts by mass, the amount of the conductive fine particles is too large and the number of contacts due to the point contact between the conductive fine particles increases, so that the electric resistance between the electrodes formed on the substrate tends to increase. is there.

The average particle size of the conductive fine particles is
It is preferably 0.05 to 5.0% of the average particle diameter of the conductive particles. When the average particle size of the conductive particles is less than 0.05% of the average particle size of the conductive particles, the effect of adding the conductive particles tends to be insufficient because the conductive particles are too small. , 5.0%, the electric resistance between the electrodes formed on the substrate tends to increase.

(Other Additives) Further, the common transfer material may be blended with additives such as a conventionally known photopolymerization initiator. As the photopolymerization initiator,
For example, "Darocur 117" manufactured by Ciba Geigy
3 "," Irgacure 184 "," Irgacur
e651 ”,“ Kayakyu BP ”manufactured by Nippon Kayaku Co., Ltd., or the like can be used. The compounding amount of the photopolymerization initiator may be 0.1 to 20 parts by mass with respect to 100 parts by mass of the photocurable resin.

(Manufacturing Method of Common Transfer Material) In the common transfer material of the present invention, for example, the above-mentioned photocurable resin, photopolymerization initiator, conductive particles and the like are weighed so as to have a predetermined blending amount, Is prepared by mixing with a roll, a mixer or the like.

(Liquid Crystal Panel) The liquid crystal panel of the present invention includes a first substrate, a second substrate installed on the first substrate via a liquid crystal layer, a first substrate and a second substrate. An electrode formed on the liquid crystal layer side of the first substrate and an electrode formed on the liquid crystal layer side of the second substrate. A common transition electrode using the above-mentioned common transition material is installed between the two. A schematic sectional view of an example of the liquid crystal panel of the present invention is shown in FIG. In FIG. 5, the liquid crystal panel 10 of the present invention
In No. 0, the first substrate 105 and the second substrate 106 are installed so as to face each other with the liquid crystal layer 111 interposed therebetween.
An electrode 107 and an electrode 108 are formed on the substrate 105 and the second substrate 106, respectively.
12 is formed so as to surround the liquid crystal layer 111.
In addition, the common transition electrode 101 is inside the sealing material 112,
That is, it is installed on the liquid crystal layer 111 side of the sealing material 112.

Since the liquid crystal panel of the present invention is constructed such that the common transition electrode 101 using the above-mentioned common transition material is installed between the electrodes 107 and 108, it contains a large amount of non-conductive filler. The reliability of the liquid crystal panel can be significantly improved as compared with the conventional liquid crystal panel using the common transition electrode.

Here, the first substrate 105 and the second substrate 1
A conventionally known substrate can be used for 06, and for example, a glass substrate or a silicon substrate is used.
Further, on the first substrate 105 and the second substrate 106, in addition to the electrodes 107, the electrodes 108, the sealing material 112, and the common transition electrode 101, for example, a color filter,
A black matrix, a polarizing plate, etc. may be installed. Further, switching elements such as TFT (thin film transistor) and MIM (metal insulator metal) may be installed. In addition, the electrodes 107 installed on the first and second substrates,
As the electrode 108, for example, an ITO (indium tin oxide) film, a SnO ₂ (tin oxide) film, or the like can be used. Note that the common transition electrode 101 can also be installed outside the sealing material 112, that is, on the side of the sealing material 112 that is not the liquid crystal layer 111 side. Also, the common transition electrode 1
The photo-curable resin used for 01 and the resin used for the sealing material 112 may be the same type of resin component or different types of resin components.

The liquid crystal forming the liquid crystal layer 111 includes
A conventionally known liquid crystal is used, for example, TN (Twiste
d Nematic) liquid crystal, STN (Super Twisted Nematic) liquid crystal, TSTN (Triple Super Twisted Nematic) liquid crystal, FSTN (Film Super Twisted Nematic) liquid crystal, or the like may be used.

The liquid crystal panel of the present invention is, for example, a mobile phone, a personal computer, a word processor, a television, an electronic notebook, a digital camera, a video camera, a projector, a calculator, a clock,
It can be suitably used for stereos, car navigations, microwave ovens, facsimiles, copiers and the like.

(Manufacturing Method of Liquid Crystal Panel) In the manufacturing method of the liquid crystal panel of the present invention, a pair of substrates is prepared, and a common transfer electrode using the above-mentioned common transfer material is formed on the upper surface of at least one of these substrates. A step, a step of forming a plurality of closed frame bodies as a sealing material on the upper surface of at least one of these substrates, and a step of injecting liquid crystal by dropping liquid crystal into each of the plurality of closed frame bodies, The method includes a step of bonding these substrates, a step of collectively bonding the polarizing plate on the bonded substrates, and a step of collectively dividing the substrates to which the polarizing plate is bonded into a plurality of liquid crystal panels.

In the method of manufacturing a liquid crystal panel of the present invention, the liquid crystal is injected, for example, as shown in FIG. 6, by dropping the liquid crystal 111a inside the sealing material 112 formed in the closed frame body having no liquid crystal injection port. Since the time-consuming injection of liquid crystal can be collectively performed before the bonded substrates are divided as shown in FIG. 6, the liquid crystal is divided into a plurality of bonded substrates as in the conventional case, and this division is performed. It becomes unnecessary to inject liquid crystal into each of the plurality of bonded substrates. Therefore, according to the method of manufacturing a liquid crystal panel of the present invention, the production efficiency of the liquid crystal panel can be dramatically improved. Further, in the liquid crystal panel manufacturing method of the present invention, since the common transition electrode made of the common transition material containing almost no non-conductive filler is used, the reliability of the liquid crystal panel can be further improved. Here, the liquid crystal is dropped by, for example, a method of applying with a dispenser, a method of applying with an inkjet, or the like.

In the method of manufacturing a liquid crystal panel of the present invention,
As a method of forming a common transfer electrode or a method of forming a seal material on a closed frame, for example, a method of applying the common transfer material or the seal material onto a substrate from a small syringe by a dispenser, or a method of applying the common transfer material by screen printing. There is a method of printing a material or a sealing material on a substrate.

As a method of bonding the two substrates together, for example, as shown in FIG.
The substrate 105 on which the common transfer electrode 101 is formed is covered over the substrate 106 on which the sealing material 112 in which is injected is formed, and these substrates 105 and 106 are formed.
There is a method of pressurizing the space. After pressing the substrate, the sealing material 112 and the common transfer electrode 101 are irradiated with light of, for example, about 3000 to 5000 mJ, heated, or both, to cure the sealing material 112 and the common transfer electrode 101. The sealing material 11
2 and the common transfer electrode 101 can be formed on different substrates, or can be formed on the same substrate.

As a method of collectively attaching the polarizing plate on the substrate, for example, as shown in FIG.
The large-sized substrate 10 from the roll 119 wound with 18
There is a method of collectively pasting on the 5. Therefore,
By using this method for attaching the polarizing plate, it is not necessary to attach the polarizing plate to each of the divided cells, so that the production efficiency of the liquid crystal panel can be dramatically improved.

As a method of dividing the bonded substrates into a plurality of liquid crystal panels at a time, for example, a dividing device 113 as shown in FIG. Etc.

[0041]

EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited thereto.

(Preparation of Sample) i) Preparation of Common Transition Material For the common transition materials of Examples 1 to 18 and Comparative Example 1, first, materials having the physical properties shown in Tables 1 to 5 were prepared.
These materials are weighed so as to have the composition shown in, and then a photopolymerization initiator or a thermosetting agent is added to the photocurable resin, and these are mixed by a triple roll, and then conductive particles are added and vacuum centrifugal stirring is performed. Kneading was performed using the method to prepare an average distribution amount of conductive particles in the resin of 50 ± 5 particles / mm ² .

The common transfer materials of Examples 15 to 18 were mixed by the Turbula mixer method by adding conductive fine particles to the photocurable resin in advance before mixing the photocurable resin and the photopolymerization initiator. It was produced in the same manner as above using the above.

Incidentally, Examples 1 to 10 and Examples 15 to
The conductive particles of No. 18 were gold-plated plastic particles (Micropearl AU-2062 manufactured by Sekisui Chemical Co., Ltd.).
5, average particle size 6.25 to 6.45 μm) was used.
As the conductive particles of Examples 11 to 14, gold-plated plastic particles (Micropearl AULB-206 manufactured by Sekisui Chemical Co., Ltd., average particle diameter 6.0 to 6.2 μm) were used.
m) was used.

The conductive particles of Examples 11 to 14 have protrusions, and these protrusions were manufactured as follows. First, silver powder with an average particle size of 0.2 μm (manufactured by Fukuda Metal Co., Ltd.,
The product name “Silcoat Ag · CG”) was dipped in a sufficient amount of acetone to be dispersed by applying ultrasonic vibration.
In addition to this, a 3% silane coupling (Toshiba Silicon Co., trade name "TSC-8350") aqueous solution and an epoxy curing agent (Shikoku Kasei Co., trade name "Curazole 2M"
Z ") is added and dissolved, and 50% epoxy resin (manufactured by Yuka Shell Co., trade name" Epoxy Epicoat-1 ") is added.
001 ″) was added and mixed, and the above plastic particles were added and mixed therein, and acetone was volatilized as it was. Here, the mixing ratio of the silver powder, the silane coupling aqueous solution, and the epoxy curing agent was 129: 4: 9. Next, this was vacuum dried at room temperature and made into single particles by a ball mill, and then 1
The protrusion was produced by heating at 50 ° C. for 10 minutes.

Ii) Preparation of Liquid Crystal Panel The liquid crystal panels of Examples 1-18 and Comparative Example 1 were prepared as follows. First, both the array substrate and the color filter substrate are processed from the cleaning process to the rubbing process, and an in-plane spacer (Sekisui Chemical Co., Ltd.
Product name "SP-2045AS", spacer diameter 4.5μ
m, fixed type) was sprayed and heated at 120 ° C. for 15 minutes, and then the common transfer material was applied by a dispenser. The coating amount was in the range of 180 to 220 pieces / mm ² , and the coating was performed with a CV value of 10 or less as a target. At this time, the coating conditions were such that the nitrogen discharge pressure was 0.3 MPa, the discharge time was 0.06 seconds, and the inner diameter of the dispenser nozzle was 0.24 mm. Under these conditions, the coating was carried out on an electrode of about 900 μm square so that the coating diameter was 250 to 300 μm and the height was within 25 μm.

Next, on the color filter substrate, a curable epoxy resin combined with light and heat (manufactured by Kyoritsu Kagaku Sangyo Co., Ltd., trade name "World Rock D70-E3") was used as a sealing material with a line width of 120 μm ± 20 μm by a dispenser to close the frame. The liquid crystal was injected into the inside of the sealing material by drawing so that

Finally, the array substrate and the color filter substrate are bonded together in a vacuum of 6.5 × 10 ^-1 Pa,
Then, it pressed by atmospheric pressure. On the pressed substrate,
It was irradiated with light of 4000 mJ and then heated at 120 ° C. for 60 minutes. Finally, the cells are divided into cells, and the cells of Examples 1 to 18 are separated.
The liquid crystal panel of Comparative Example 1 was used.

(Evaluation Method) By measuring the electric resistance between the electrodes of the liquid crystal panels of Examples 1 to 18 and Comparative Example 1 and calculating the proportion of the liquid crystal panel in which the current flowed, the liquid crystal of the Examples and Comparative Examples The panel was evaluated.

I) Measuring method of electric resistance Since electric resistance is measured, terminals for connecting the liquid crystal panel and an external signal driver are present around the liquid crystal panel.
It was used to measure the resistance between the electrodes of each sample. The results are shown in Tables 1-5. The electric resistance between the electrodes was measured immediately after the liquid crystal panel was manufactured and at a temperature of 60 ° C. and a humidity of 95.
The values in the two cases were measured after aging for 500 hours in%.

Ii) Reliability of liquid crystal panel The reliability of the liquid crystal panel was evaluated by the following formula. (Reliability of liquid crystal panel) = (number of liquid crystal panels through which current flows) / (total number of liquid crystal panels for which electrical resistance was measured)

[0052]

[Table 1]

[0053]

[Table 2]

[0054]

[Table 3]

[0055]

[Table 4]

[0056]

[Table 5]

(Note 1) Acrylic modified epoxy resin A and acrylic modified epoxy resin B were mixed at a ratio of 50:50 (Note 2) Tin oxide (manufactured by Ishihara Sangyo Co., Ltd., "SN-100
P ”, average particle diameter 0.2 μm) (Note 3) Silica (manufactured by Admafine,“ SO-C
1 ", average particle size distribution 2 μm) (Note 4) Phenyl 2-hydroxy-2-propyl ketone (Ciba Geigy," Darocur 1173 ") (Note 5) Organic acid dihydrazide (Ajinomoto," Amicure-VDH ") (Evaluation Results) As shown in Tables 1 to 5, the liquid crystal panels of Examples 1 to 18 had significantly lower electric resistance than the liquid crystal panel of Comparative Example 1, and were excellent in reliability of the liquid crystal panel. In addition, the liquid crystal panels of Examples 1 to 18 did not change their electric resistances much before and after aging,
It was also found to have excellent durability.

Further, as shown in Table 1, the liquid crystal panels of Examples 1 and 2 in which the resin viscosity before curing is within the range of 100,000 to 500,000 Pa · s, the resin viscosity before curing is within the range. It tended to be more reliable than the liquid crystal panels of Examples 3 to 4 not included in the above.

Further, as shown in Table 2, the liquid crystal panel of Example 5 in which the content of the conductive particles was in the range of 0.2 to 5 parts by mass with respect to 100 parts by mass of the resin was The reliability was superior to that of the liquid crystal panel of Example 6 in which the compounding amount was not within the range, and the electric resistance after aging tended to be lower than that of the liquid crystal panel of Example 7.

Further, as shown in Table 3, the average particle diameter of the conductive particles is in the range of 100 to 110% of the distance between the electrodes, and the compressive elastic modulus is in the range of 200 to 400 kg / mm ^2. The liquid crystal panel of Example 8 has a lower electric resistance than the liquid crystal panel of Example 9 in which the average particle size of the conductive particles and the compressive elastic modulus are not within the range, and is more reliable than the liquid crystal panel of Example 10. There was a tendency.

Further, as shown in Table 4, the liquid crystal panel of Example 11 in which the protrusion height of the conductive particles was within the range of 0.05 to 5% of the average particle diameter of the conductive particles was There was a tendency for the reliability to be superior to that of the liquid crystal panel of Example 13 in which the height of protrusions was not within the range. In addition, the liquid crystal panel of Example 12 having a protrusion height within the above range tended to be more reliable than the liquid crystal panel of Example 14 having a protrusion height outside the above range.

Further, as shown in Table 5, the liquid crystal panel of Example 15 in which the blending amount of the conductive fine particles was within the range of 0.2 to 20 parts by mass with respect to 100 parts by mass of the resin, The reliability tended to be superior to that of the liquid crystal panel of Example 17 in which the compounding amount was not within the range. In the liquid crystal panel of Example 16 in which the amount of conductive fine particles blended was within the above range, the liquid crystal panel of Example 16 in which the amount of conductive fine particles blended was not within the above range
The electric resistance before aging tended to be lower than that of the liquid crystal panel of No. 8.

The embodiments and examples disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

[0064]

As described above, according to the present invention, it is possible to provide a common transition material capable of improving the reliability of a liquid crystal panel, a liquid crystal panel using the same, and a method for manufacturing the liquid crystal panel.

[Brief description of drawings]

FIG. 1 is a schematic enlarged cross-sectional view of an example of a common transition material of the present invention.

FIG. 2 is a schematic enlarged cross-sectional view of an example of the common transfer material of the present invention when protrusions are formed on the surface of conductive particles.

FIG. 3 is a schematic enlarged cross-sectional view showing the height of protrusions formed on the surface of conductive particles.

FIG. 4 is a schematic enlarged cross-sectional view of an example of the common transition material of the present invention to which conductive fine particles are added.

FIG. 5 is a schematic cross-sectional view of an example of a liquid crystal panel of the present invention.

FIG. 6 is a schematic conceptual diagram showing an example of a liquid crystal dropping step used in the present invention.

FIG. 7 is a schematic conceptual view showing an example of a substrate bonding process used in the present invention.

FIG. 8 is a schematic conceptual view of an example of a polarizing plate attaching device used in the present invention.

FIG. 9 is a schematic perspective view of an example of a dividing device used in the present invention.

FIG. 10 is a cross-sectional structural diagram of a conventional liquid crystal panel.

FIG. 11 is a conceptual diagram showing a conventional substrate bonding process.

FIG. 12 is a top view of a conventional bonded substrate.

FIG. 13 is a perspective view of a conventional bonded substrate.

FIG. 14 is a conceptual diagram showing a conventional liquid crystal injection process.

FIG. 15 is a top view of a conventional liquid crystal panel.

FIG. 16 is an enlarged cross-sectional view of a conventional common transition electrode.

[Explanation of symbols]

100,400 liquid crystal panel, 101,201,30
1,401 common transition electrode, 102,402 resin,
103, 203, 303, 403 conductive particles, 404
Inorganic filler, 105, 106, 405, 406 Substrate, 107, 108, 207, 208, 307, 30
8,407,408 electrodes, 209 protrusions, 310 conductive fine particles, 111,411 liquid crystal layer, 111a, 41
1a liquid crystal, 112,412 sealing material, 113 dividing device, 114 blade, 415 bonded substrate, 416
Liquid crystal injection port, 417 sealing material, 118 polarizing plate, 1
19 rolls.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Makoto Nakahara             22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka             Inside the company F-term (reference) 2H088 FA01 FA09 FA26 GA02 HA02                       JA05 JA13 KA30 MA20                 2H089 LA07 NA10 NA15 NA22 NA41                       NA42 NA44 QA16 RA05 RA10                       SA17 TA02                 2H092 GA36 HA14 HA16 HA17 MA01                       NA11 NA29 QA07 QA10                 4H027 BD24 BE03

Claims (11)

[Claims] 1. A common transition material used for a common transition electrode provided between electrodes formed adjacent to each other inside each of a pair of opposing substrates, wherein the common transition material is a photocurable resin. And a conductive particle, and the non-conductive filler is contained in an amount of 1 part by mass or less based on 100 parts by mass of the photocurable resin. 2. The viscosity of the photocurable resin before curing is 10
The common transition material according to claim 1, wherein the common transition material has a viscosity of 000 to 500,000 Pa · s. 3. The common transfer material according to claim 1, wherein the conductive particles are contained in an amount of 0.2 to 5 parts by mass with respect to 100 parts by mass of the photocurable resin. 4. The common transfer material according to claim 1, wherein the average particle diameter of the conductive particles is 100 to 110% of the distance between the electrodes formed on the substrate. . 5. The conductive particles have a compressive elastic modulus of 200 to 200.
The common transfer material according to claim 4, wherein the common transfer material is in the range of 400 kg / mm ² . 6. The common transfer material according to claim 1, wherein the surface of the conductive particle has a protrusion protruding toward the outside of the conductive particle. 7. The common transition material according to claim 6, wherein the height of the protrusion is 0.05 to 5% of the average particle diameter of the conductive particles. 8. The common transfer material according to claim 1, further comprising conductive fine particles having an average particle size smaller than that of the conductive particles. 9. The common transfer material according to claim 8, wherein the conductive fine particles are contained in an amount of 0.2 to 20 parts by mass with respect to 100 parts by mass of the photocurable resin. 10. A first substrate, a second substrate provided on the first substrate via a liquid crystal layer, and the liquid crystal between the first substrate and the second substrate. A liquid crystal panel including a sealing material provided so as to surround the layers, an electrode formed on the liquid crystal layer side of the first substrate, and an electrode formed on the liquid crystal layer side of the second substrate. A liquid crystal panel, in which a common transition electrode using the common transition material according to claim 1 is provided between them. 11. A step of preparing a pair of substrates, and forming a common transfer electrode using the common transfer material according to claim 1 on the upper surface of at least one of the substrates, and the upper surface of at least one of the substrates. A step of forming a plurality of closed frame bodies as a sealing material, a step of injecting liquid crystal by dropping liquid crystal into each of the plurality of closed frame bodies, a step of bonding the pair of substrates, A method of manufacturing a liquid crystal panel, comprising: a step of collectively attaching a polarizing plate onto the substrates which are attached together; and a step of dividing the substrate onto which the polarizing plate is attached into a plurality of liquid crystal panels at once.