JPH08179310A - Liquid crystal display device and its production - Google Patents

Abstract

PURPOSE: To eliminate the nonuniform electrification on oriented film surface and to eliminate the uneven color occurring in the nonuniform spraying of spacers by forming an insulating thin film of which surface resistance drops by irradiation with UV light on an electrode substrate and irradiating the film with UV rays. CONSTITUTION: Such insulating thin film 4 which is made to exhibit electrical conductivity and of which surface resistance drops by irradiation with UV rays is formed on the transparent substrate 2 on which a patterned electrode 3 is formed. The insulating thin film 4 is formed by adding a photoconductive material, such as polyvinyl carbazole into a coating liquid consisting essentially of silica and crosslinked acryl, applying such liquid on the substrate 2 and baking the coating. The oriented film 5 is formed on the insulating thin film 4. The surface of the substrate 9 obtd. in such a manner is subjected to an orientation treatment and is then irradiated with UV light. Spacers 6 are sprayed on the substrate 9 subjected to removal of electrification and is stuck to another substrate 9a formed by the similar process by using a sealant 7. Liquid crystals 8 are sealed between the substrates 9 and 9a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device having an electrode substrate in which a transparent electrode, an insulating thin film and an alignment film are sequentially laminated on a substrate and a method of manufacturing the same, and more specifically, a liquid crystal display device. The present invention relates to a liquid crystal display device and a method for manufacturing the same, in which static electricity generated when manufacturing a display device is quickly removed.

[0002]

2. Description of the Related Art Conventionally, in order to prevent leakage of the upper and lower transparent electrodes due to conductive foreign matter sandwiched between the upper and lower substrates, a liquid crystal display device has an insulating thin film mainly composed of silica or crosslinked acryl formed on the transparent electrodes. ing.

However, the insulating thin film is used to maintain the insulation between the transparent electrodes patterned on the substrate.
It has a resistance value of 0 ¹³ Ω / □ or more, and has two interfaces, that is, the interface between the transparent electrode and the insulating thin film and the interface between the insulating thin film and the alignment film. It is more easily charged than a liquid crystal display device that does not have a thin film, and in particular, it is more easily charged by rubbing during rubbing or peeling or rubbing during transport of the substrate.

Since the static electricity thus charged is unevenly charged on the transparent electrode pattern portion and the non-electrode portion (between the electrode patterns), the spacers charged at the time of ejection / spraying are unevenly dispersed on the surface of the alignment film. To be done. As a result, cell gap unevenness occurs in parallel with the electrode pattern of the transparent electrode substrate on the side where the spacers are scattered, and this cell gap unevenness appears as color unevenness of the liquid crystal display device.

FIG. 8 schematically shows a state where the spacers are nonuniformly dispersed on the substrate. The horizontal axis of the lower graph shown in FIG. 8 corresponds to the position in the above schematic diagram.

As shown in FIG. 8, since the charged state is different between the transparent electrode pattern portion 3 and the non-electrode portion, the charged spacers 6 are aggregated on the non-electrode portion. Actually, by determining some suitable areas in the direction perpendicular to the long side of the pattern electrode and measuring the dispersion density of the spacers in that area, as shown in the lower graph of FIG. There will be variations in the spacer distribution density between parts.

As a method for removing the above-mentioned charge, an ion wind generated by an ion air type ionizer (for example, a static charge ionizer manufactured by Techno Ryowa Co., Ltd.) is blown onto the charged substrate to remove the charge on the substrate surface. It is common practice to neutralize charges.

Another method is, for example, Japanese Patent Laid-Open No.
As disclosed in JP-A-232459, by dispersing fine particles of a conductive oxide such as antimony, indium and tin in an insulating thin film, the surface resistance of the insulating thin film is reduced to about 10 ⁹ Ω / □. Such a method is also proposed.

[0009]

However, as disclosed in the above-mentioned Japanese Patent Laid-Open No. 5-232459, when conductive fine particle powder is dispersed in the insulating thin film, the space between the transparent electrode patterns on the same substrate is reduced. Since it is necessary to maintain insulation, it is difficult to reduce the surface resistance of the insulating thin film to 10 ⁹ Ω / □ or less.

Therefore, there is a limit to the ability to remove static electricity charged on the surface of the alignment film, and the time when the electrostatic voltage (surface potential) of the alignment film becomes 1/100 of the initial voltage (hereinafter τ).
_It is defined as _1/100 . ) Is about 20 to 30 seconds, and the color unevenness of the liquid crystal display device due to the non-uniform distribution of the spacers cannot be completely eliminated.

Further, when an ion air ionizer is used, the charge state such as the positive / negative of the charge and the amount of charge changes depending on the process of charging the substrate and the substance constituting the substrate. In many cases, charge removal is not effectively performed. When the charged state is specified and the state of the ionic wind is optimized, τ _1/100 is about 15 to 60 seconds, but depending on the relationship between the charged state and the ionic wind, the charged static electricity is completely removed. It may not be done.

Even if the conditions for removing the charge are optimized, this ion-air type ionizer generates wind, so that it is difficult to install the ion-air type ionizer in the spacer spraying device including the step of discharging and spraying particles. , Could not effectively prevent uneven distribution of spacers.

The present invention has been made to solve the above problems, and the purpose thereof is to:
By forming an insulating thin film whose surface resistance drops with the irradiation of ultraviolet light on the transparent electrode, and irradiating the alignment film with ultraviolet light from the ultraviolet light irradiation device provided during the manufacturing process,
It is an object of the present invention to provide a liquid crystal display device and a method for manufacturing the liquid crystal display device, which can eliminate uneven charge on the surface of the alignment film and eliminate color unevenness of the liquid crystal display device due to uneven distribution of spacers.

[0014]

A liquid crystal display device according to the present invention is a liquid crystal display device in which liquid crystal is sealed between two electrode substrates each having at least a transparent electrode, an insulating thin film and an alignment film. Is characterized in that the surface resistance is lowered by irradiation with ultraviolet light, and thereby the above object is achieved.

The method of manufacturing a liquid crystal display device according to the present invention is the method of manufacturing a liquid crystal display device in which liquid crystal is sealed between two electrode substrates having at least a transparent electrode, an insulating thin film and an alignment film. The above is characterized by including a step of forming an insulating thin film whose surface resistance is lowered by irradiating ultraviolet light, and a step of irradiating ultraviolet light on the electrode substrate after forming the insulating thin film, By doing so, the above object is achieved.

[0016]

According to the present invention, a liquid crystal display device in which an insulating thin film that exhibits conductivity only when irradiated with ultraviolet light and reduces surface resistance and an alignment film that has been subjected to an alignment treatment are sequentially laminated on a transparent electrode By irradiating the transparent substrate with ultraviolet light from the ultraviolet light irradiation device provided during the manufacturing process, it is possible to eliminate uneven charging on the surface of the alignment film. As a result, the spacers can be evenly dispersed on the surface of the alignment film, so that a liquid crystal display device having extremely excellent display uniformity can be provided.

As the insulating thin film that lowers the surface resistance only when irradiated with ultraviolet light, polyvinylcarbazole (hereinafter referred to as PVK) or ethyl is used in an insulating thin film forming coating liquid containing silica or crosslinked acryl as a main component. A photoconductive substance represented by carbazole is added to the main component in an amount of 1
It is realized by adding ~ 5 wt%, coating on a substrate and baking.

When PVK, which is a typical photoconductive substance, absorbs ultraviolet light having a wavelength of 300 to 350 nm, it is energetically excited to generate a pair of holes and electrons. When an electric field is applied to PVK in this state, the generated holes and electrons serve as carriers to increase the conductivity. This carrier can easily carry out hopping conduction in the molecular chain of PVK, but when the distance between the molecular chains becomes large, hopping becomes difficult.

If PVK blocks ultraviolet light, it reversibly lowers the conductivity. When PVK is added to a coating liquid for forming an insulating thin film containing silica or crosslinked acrylic as a main component, the surface resistance of the insulating thin film to be formed is set to 10 ⁸ Ω / □ or less at the time of irradiation with ultraviolet light of the above wavelength to dissipate static electricity In order to impart sufficient photoconductivity to the insulating thin film, PVK must be added to the coating liquid in an amount of 1 wt% or more. When the added amount is 1 wt% or less, hopping conduction between molecular chains becomes difficult, and the surface resistance of the thin film formed even when irradiated with ultraviolet light is 10 ⁹ Ω / □ or more.

However, if the addition amount is 5 wt% or more, phase separation occurs between the main component and PVK when the insulating thin film is formed, and the transmittance of the substrate is lowered. Even if PVK is added to the insulating thin film, the film hardness is 5H or more and the visible light transmittance of the substrate is 90% or more in the above concentration range, and it can be sufficiently used as a substrate for a liquid crystal display device.

By irradiating the thus obtained substrate with ultraviolet light of the above wavelength from an ultraviolet light irradiation device provided during the process, the surface resistance of the insulating thin film is lowered to 10 ⁸ Ω / □ or less, and τ ₁ It becomes possible to set _{/ 100} to about 10 seconds. As a result, the dispersion of spacer distribution density is ±
It is possible to suppress the variation of the cell gap within 15% and within ± 4%, and the cell color unevenness as described above is eliminated.

Particularly, when the ultraviolet light irradiating device is installed in the spacer spraying device and the electrostatic charge is removed by irradiating the spacer light with the ultraviolet light having the above-mentioned wavelength at the same time, the uniformity of the spacer spraying becomes the best. The dispersion of the dispersion density is within ± 10%. The variation of the cell gap of the liquid crystal display device manufactured in this case is within ± 2%,
A liquid crystal display device having extremely high display uniformity is provided.

In addition to PVK, an inorganic conductive substance such as antimony oxide or indium oxide, or an organic conductive substance such as polyaniline or polypyrrole is added to the main component in a coating liquid containing silica or crosslinked acrylic as a main component. 1-5
By adding wt%, the surface resistance, which was 10 ⁸ Ω / □ or less when irradiated with ultraviolet light when PVK alone was added, is reduced to 10 ⁷ Ω / □ or less, and τ _1/100 is 5 seconds or less. It is also possible to

Even when these substances were added to the insulating thin film, the film hardness was 5H or more and the visible light transmittance of the substrate was 90% or more in the above concentration range.

When the electrostatic charge is removed by irradiating the substrate thus obtained with ultraviolet light having the above-mentioned wavelength during the spraying of the spacers, a liquid crystal display cell having no color unevenness and the best display uniformity is obtained. Provided. At this time, the dispersion of the spacer dispersion density is within ± 8%, and the dispersion of the cell gap is within ± 1%.

On the other hand, since PVK hardly absorbs light having a wavelength of 350 nm or more, it does not exhibit conductivity by visible light. Therefore, after manufacturing the liquid crystal display cell,
By attaching, for example, a polarizing plate having a function of blocking ultraviolet light (for example, manufactured by Nitto Denko KK) to both surfaces of the cell, the ultraviolet light is blocked and leakage between the pattern electrodes does not occur.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments, but the present invention is not limited to the following embodiments. FIG. 1 is a sectional view showing the configuration of a liquid crystal display device according to the present invention.

According to the invention, each substrate 2, 2a
Insulating thin films 4 and 4a that exhibit conductivity by irradiation with ultraviolet light to lower the surface resistance and alignment films 5 and 5a that have been subjected to an alignment treatment are sequentially formed on the transparent electrodes 3 and 3a. After the spacers 6 are scattered on the surfaces of the laminated transparent substrates 9 and 9a for liquid crystal display devices, the liquid crystal 8 is sealed with the sealant 7, and the polarizing plates 17 and 17a are respectively placed on the opposite sides of the substrates 2 and 2a from the liquid crystal layer side. The liquid crystal display device 1 is completed by pasting.

(Example 1) A coating liquid for forming an insulating thin film containing crosslinked acrylic as a main component (for example, Tokyo Ohka MOF No.
To 15A), 2 wt% of PVK (for example, Kanto Chemical poly-N-vinylcarbazole) was added to acrylic to prepare a coating solution.

As shown in FIG. 2, on the transparent substrate 2 on which the pattern electrode 3 is formed by a general photo process,
After applying the prepared coating solution and drying at 80 ° C., 2
By firing at 00 ° C. for 1 hour, an insulating thin film 4 having a thickness of 100 nm was formed.

Next, a coating liquid for forming a polyimide alignment film (for example, Nissan Chemical SE-5 is formed on the formed insulating thin film 4).
211) is applied, dried at 80 ° C, and then at 200 ° C for 1
By firing for a time, an alignment film 5 having a thickness of 50 nm was formed.

On the substrate 9 thus obtained, as shown in FIG.
Alignment treatment is performed by a rubbing method using a device as shown in FIG. 1, and then an illuminance of 1000 mW / cm at a wavelength of 313 nm is measured from a high pressure mercury lamp 16 installed in the device.
Irradiated with ² ultraviolet light.

The surface potential of the alignment film 5 immediately after rubbing and after irradiation with ultraviolet light was measured with a high-speed surface electrometer (manufactured by Trek Co., Ltd.). As a result, immediately after rubbing, about 2 kV was measured.
The surface potential that was 10 seconds after irradiation with ultraviolet light,
It was confirmed that the voltage dropped to about 20V.

Spacers 6 were sprinkled on the substrate 9 from which the above-mentioned charge was removed, and the other substrate 9a prepared by the same process as that described above was bonded to the substrate 9 using a sealant 7.

After that, polarizing plates 17 and 17a having a function of blocking ultraviolet light were attached to both sides of the cell obtained by enclosing the liquid crystal 8 between the both substrates to manufacture a liquid crystal display device.

As a result, it was possible to obtain a liquid crystal display device having good display uniformity without color unevenness. Further, when the cell was irradiated with the same ultraviolet light as the above in this state, no leak was observed between the pattern electrodes.

As shown in FIG. 5, some suitable regions 18 are defined in the vertical direction 13-13a of the transparent electrode pattern 3 of the substrate 9 on which the spacers 6 are dispersed, and the spacer dispersion density and the cell gap of the region 18 are defined. And were measured.

The scattered state of the spacers 6 at this time is shown in FIG. 6 as a schematic view similar to FIG. 8 used in the conventional example. The dispersion of the dispersion density of the spacer 6 between the electrode pattern portion 3 and the non-electrode portion is within ± 15%,
As a result, the variation in cell gap was within ± 4%. As compared with FIG. 8 which is a conventional example, the dispersion of the dispersion density of the spacers 6 is reduced, and thus the uniformity of the cell gap is improved. In addition, no liquid crystal alignment defect due to irradiation with ultraviolet light was observed.

Further, an insulating thin film was formed directly on the glass substrate on which no electrode was formed by the same method as described above, and the surface resistance and film hardness of the insulating thin film were measured. The surface resistance was measured using a Mitsubishi Yuka surface resistance meter, and the film hardness was JIS K5.
It measured using the test device based on 401. as a result,
The surface resistance is about 10 ¹² Ω / □ without UV irradiation,
It was about 10 ⁸ Ω / □ at the time of irradiation with ultraviolet light having an illuminance of 1000 mW / cm ² at a wavelength of 313 nm. Further, when the ultraviolet light was blocked thereafter, the surface resistance returned to about 10 ¹² Ω / □ again, and the film hardness at this time was 5H.

(Example 2) In the same manner as in Example 1, a coating solution for forming an insulating thin film was prepared, an insulating thin film was formed on a pattern electrode formed on a transparent substrate, and polyimide alignment was performed on the insulating thin film. A film was formed.

Next, the alignment film surface was subjected to alignment treatment by the same method as in Example 1 except that the ultraviolet light was not irradiated.

On the liquid crystal display device substrate 9 obtained as described above, a spacer spraying device 10 as schematically shown in FIG. 4 is used, and a high pressure mercury lamp 12 installed in the spacer spraying device is used. The substrate 9 was irradiated with ultraviolet light having an illuminance of 1000 mW / cm ² at a wavelength of 313 nm. Ten seconds after the irradiation with the ultraviolet light, the spacers 6 were sprayed on the substrate 9 from the spray nozzle 11 in the figure with the irradiation with the ultraviolet light.

As a result, it was confirmed that the surface potential of the alignment film, which was about 1 kV before the irradiation with ultraviolet light, decreased to about 10 V 10 seconds after the irradiation with ultraviolet light.

Then, a liquid crystal display device was manufactured in the same manner as in Example 1. As a result, it was possible to obtain a liquid crystal display device which was free from color unevenness and had better display uniformity than Example 1. Also in this example, no leakage between pattern electrodes was observed even when the cell was irradiated with the same ultraviolet light as described above.

Further, as a result of measuring the dispersion density and the cell gap of the spacer 6 in the same manner as in Example 1, the dispersion of the dispersion density of the spacer 6 between the electrode pattern portion and the non-electrode portion is within ± 10%. As a result, the variation of the cell gap was within ± 2%, which was extremely small. In addition, no liquid crystal alignment defect due to irradiation with ultraviolet light was observed.

(Example 3) A coating liquid was prepared by dispersing 5 wt% of antimony oxide fine particles and 2 wt% of PVK in acrylic to a coating liquid for forming an insulating thin film containing crosslinked acrylic as a main component.

As in Example 1, this coating solution was applied onto a pattern electrode formed on a transparent substrate, dried at 80 ° C., and then baked at 200 ° C. for 1 hour to obtain an insulating film having a thickness of 100 nm. A thin film was formed.

Next, a liquid crystal display device was manufactured by the same process as in Example 2. At the time of spraying the spacers, the illuminance of 10 at a wavelength of 313 nm was measured by the high pressure mercury lamp 16 installed in the apparatus as shown in FIG.
The substrate was irradiated with 00 mW / cm ² ultraviolet light.

As a result, it was confirmed that the surface potential of the alignment film, which was about 500 V before the irradiation with ultraviolet light, decreased to about 5 V 5 seconds after the irradiation with ultraviolet light.

As a result, it was possible to obtain a liquid crystal display device which was free from color unevenness and had better display uniformity than in Example 2. Also in this example, no leakage between pattern electrodes was observed due to the irradiation of the cell with the ultraviolet light.

Further, as a result of measuring the dispersion density and the cell gap of the spacer 6 by the same method as in Example 1, the dispersion of the dispersion density of the spacer 6 between the electrode pattern portion and the non-electrode portion is within ± 8%. As a result, the variation in cell gap was extremely small, within ± 1%.

The spraying state of the spacers 6 at this time is shown in FIG. 7 as a schematic view similar to FIG. 8 used in the conventional example and FIG. 6 used in the embodiment. As can be seen from FIG. 7, the dispersion of the dispersion density of the spacers 6 was reduced, which improved the uniformity of the cell gap.
In addition, no liquid crystal alignment defect due to irradiation with ultraviolet light was observed.

Further, as in Example 1, this insulating thin film was formed directly on the glass substrate on which no electrode was formed,
The surface resistance and film hardness of the insulating thin film were measured. As a result, the surface resistance is 1000 mW / illuminance at a wavelength of 313 nm.
It was about 10 ⁷ Ω / □ when irradiated with ultraviolet light of cm ² , and about 10 ¹⁰ Ω / □ when not irradiated with ultraviolet light. The film hardness at this time was 5H.

Example 4 A coating solution was prepared by dispersing 5 wt% of polyaniline and 2 wt% of PVK in acrylic to a coating solution for forming an insulating thin film containing crosslinked acrylic as a main component.

As in Example 1, this coating solution was applied onto a pattern electrode formed on a transparent substrate, dried at 80 ° C., and then baked at 200 ° C. for 1 hour to obtain an insulating film having a thickness of 100 nm. A thin film was formed.

Next, a liquid crystal display device was manufactured by the same process as in Example 2. At the time of spraying the spacers, the illuminance of 10 at a wavelength of 313 nm was measured by the high pressure mercury lamp 16 installed in the apparatus as shown in FIG.
The substrate was irradiated with ultraviolet light of 00 mW / cm ² .

As a result, it was confirmed that the surface potential of the alignment film, which was about 500 V before the irradiation with ultraviolet light, decreased to about 5 V 5 seconds after the irradiation with ultraviolet light.

As a result, it was possible to obtain a liquid crystal display device which was free from color unevenness and had good display uniformity as in Example 3. Also in this example, no leakage between pattern electrodes was observed due to the irradiation of the cell with the ultraviolet light.

Further, as a result of measuring the dispersion density and the cell gap of the spacer 6 by the same method as in Example 1, the dispersion of the dispersion density of the spacer 6 between the electrode pattern portion and the non-electrode portion is within ± 8%. As a result, the variation in cell gap was extremely small, within ± 1%. In addition, no liquid crystal alignment defect due to irradiation with ultraviolet light was observed.

Comparative Example 1 A coating liquid was prepared by dispersing 5 wt% of antimony oxide fine particles in acrylic to a coating liquid for forming an insulating thin film containing crosslinked acrylic as a main component.

This coating solution was applied on a pattern electrode formed on a transparent substrate, dried at 80 ° C., and then at 200 ° C.
By baking for 1 hour, an insulating thin film having a thickness of 100 nm was formed.

Next, a coating liquid for forming a polyimide alignment film is applied on the formed insulating thin film, dried at 80 ° C., and baked at 200 ° C. for 1 hour to give a thickness of 50 n.
An alignment film of m was formed and the surface was subjected to an alignment treatment by a rubbing treatment.

Next, spacers were sprayed on the surface of the alignment film by using a general spacer spraying device. As a result of measuring the surface potential at this time, the surface potential of the alignment film, which was about 1 kV immediately after rubbing, was about 100 V immediately before spraying.

Then, a liquid crystal display device was manufactured in the same manner as in Example 1. In the liquid crystal display device manufactured by such a process, streak-like color unevenness was observed along the electrode pattern on the substrate on which the spacers were scattered. At this time,
The dispersion of the spacer dispersion density on the substrate was about ± 40%, and as a result, the dispersion of the cell gap was about ± 10%.

Comparative Example 2 An insulating thin film and an alignment film were laminated on the pattern electrode formed on the transparent substrate by the same procedure as in Comparative Example 1. Then, the surface of the alignment film was subjected to an alignment treatment by a rubbing method, and immediately after that, the charge was removed by an ion air ionizer.

Then, a liquid crystal display device was manufactured in the same manner as in Comparative Example 1. As a result of measuring the surface potential of the liquid crystal display device manufactured by such a process, the surface potential of the alignment film, which was about 1 kV immediately after rubbing, was 5 kV immediately before spraying.
It was about 0V.

As a result, also in the liquid crystal display device manufactured by such a process, similar to Comparative Example 1, streak-like color unevenness was observed along the electrode pattern on the substrate on which the spacers were scattered. At this time, the dispersion of the spacer dispersion density on the substrate was about ± 30%, and as a result, the dispersion of the cell gap was ± 8%.

[0068]

As described above, according to the present invention, an insulating thin film whose surface resistance decreases with the irradiation of ultraviolet light is formed on a transparent electrode, and alignment is performed from the ultraviolet light irradiation device in the process of the manufacturing process. By irradiating the film with ultraviolet light, it is possible to eliminate uneven charging on the surface of the alignment film. As a result, the spacers for forming the cell gap can be evenly dispersed in the substrate, and a liquid crystal display device having excellent display uniformity can be provided.

Further, according to the present invention, since it is possible to remove the charges in the spacer spraying device, it is possible to very effectively prevent the uneven spraying of the spacers due to static electricity.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of a liquid crystal display device according to the present invention.

FIG. 2 is a sectional view showing the configuration of a liquid crystal display device substrate according to the present invention.

FIG. 3 is a schematic view of a rubbing device for explaining one embodiment of a method for manufacturing a liquid crystal display device according to the present invention.

FIG. 4 is a schematic view of a spacer spraying device for explaining one embodiment of the method for manufacturing a liquid crystal display device according to the present invention.

FIG. 5 is a plan view illustrating a method of measuring a spacer dispersion density and a cell gap in the liquid crystal display device according to the present invention.

FIG. 6 is a schematic diagram for explaining a variation in spacer distribution density in the liquid crystal display device of Example 1 of the liquid crystal display device according to the present invention.

FIG. 7 is a schematic diagram for explaining variations in spacer dispersion density in the liquid crystal display device of Example 3 among the liquid crystal display devices according to the present invention.

FIG. 8 is a schematic diagram for explaining variations in spacer distribution density in a conventional liquid crystal display device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Transparent substrate 2a Transparent substrate 3 Pattern electrode 3a Pattern electrode 4 Insulating thin film 4a Insulating thin film 5 Alignment film 5a Alignment film 6 Spacer 7 Sealant 8 Liquid crystal 9 Liquid crystal display device substrate 9a Liquid crystal display device substrate 10 Spacer spraying Apparatus 11 Spacer spraying nozzle 12 High pressure mercury lamp 13-13a Straight line showing the direction of measuring spacer spraying density and cell gap 14 Rubbing roller 15 Stage 16 High pressure mercury lamp 17 Polarizing plate 17a Polarizing plate 18 Spacer spraying density and cell gap were measured region

Claims (2)

[Claims] 1. A liquid crystal display device in which a liquid crystal is sealed between two electrode substrates having at least a transparent electrode, an insulating thin film, and an alignment film, wherein the insulating thin film has a surface resistance lowered by irradiation with ultraviolet light. A liquid crystal display device characterized by being a thing. 2. A method for manufacturing a liquid crystal display device, wherein liquid crystal is sealed between two electrode substrates each having at least a transparent electrode, an insulating thin film and an alignment film, wherein the electrode substrate is irradiated with ultraviolet light. And a step of irradiating the electrode substrate on which the insulating thin film has been formed with ultraviolet light, the method for manufacturing a liquid crystal display device.