JP2000267073A - Color liquid crystal display panel and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a TFT type color liquid crystal display panel using a plastic substrate consisting of only a plastic sheet and a gas barrier film without having a solvent-resistant film by constituting the panel of a panel having a color filter on a substrate and of a counter substrate of a plastic sheet having a gas barrier film on the surface. SOLUTION: The color liquid crystal display panel 100 consists of a panel 50 (CF-on-TFT panel) having color filters 11, 13 formed on a substrate 1 having thin film transistors, and a counter substrate 17 consisting of a plastic sheet 18 having a gas barrier films 19, 19' formed on the surfaces. Thereby, only a solid transparent common electrode is necessary on the counter substrate 17 side of the CF-on-TFT panel 50, and the PR process of a metal such as chromium is not required. Thus, the chemical resistance and solvent resistance of the counter substrate 17 are not necessary to be considered, and as a result, the color liquid crystal panel 100 can be made thin and lightweight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a color liquid crystal display panel and a method of manufacturing the same, and more particularly, to a structure of a color liquid crystal display panel capable of realizing a thin and light weight and a method of manufacturing the same.

[0002]

2. Description of the Related Art Liquid crystal display panels are characterized by low power consumption, low voltage operation, thinness and light weight, as well as colorization and high definition.
Due to technological innovations such as large screens, it is used for various products such as calculators, watches, notebook computers, monitors, etc.
Further expansion of applications is expected in the future.

In particular, as a liquid crystal display panel for a portable device, a plastic liquid crystal display panel, which is thinner and lighter than a conventional liquid crystal display panel, has been recently developed. The plastic liquid crystal display panel means a liquid crystal display panel using a plastic sheet or film as a substrate instead of a conventional glass substrate.

However, a liquid crystal display panel using a plastic substrate is only used in calculators and watches, etc., and is limited to the STN type, and is widely used in notebook computers and monitors. At present, it has not been put to practical use as a liquid crystal display panel. The reason why the TFT type liquid crystal display panel has not been put to practical use is that a color filter must be formed on the counter substrate side, in this case, on a plastic substrate.

[0005] That is, as a component of a color filter, black matrix and RGB color filters,
And a transparent common electrode. In order to form a color filter on such a plastic substrate, the plastic substrate must first be resistant to a solvent such as an etchant that is exposed in the process of patterning the black matrix and the RGB color filters, and must be heated when curing them. It is necessary to have resistance to water, gas barrier properties for suppressing moisture absorption by external oxygen and water vapor, and the like.

Accordingly, functions added to the conventional plastic substrate include solvent resistance, PR process resistance, heat resistance, gas barrier resistance, and the like. In order to maintain these functions, various protective films are coated on the front and back of a plastic sheet as a base material. FIG. 10 is a sectional view showing a configuration of a conventional plastic substrate, and FIG. 11 is a sectional view of a TFT type color liquid crystal display panel using the plastic substrate.

First, a plastic sheet 18 serving as a base material is provided at the center of a plastic substrate 17, and a gas barrier film 19 such as a silicon oxide vapor-deposited film having gas barrier resistance is formed on the front and back surfaces thereof. Further, a solvent-resistant film 28 having a laminated structure of an organic film having solvent resistance and PR process resistance is formed on the surface thereof.

In the case of such a structure in which a plurality of resistant films are stacked, there is a disadvantage that the plastic substrate is deformed by the stress of the resistant films. In addition, the productivity was poor and the yield was adversely affected. Further, when a plastic substrate made of such a laminated film is used as a counter substrate of a TFT type color liquid crystal panel as shown in FIG. 11, the patterned black matrix 9 and RGB color filters 11, 13 (G is not shown). However, warpage, deformation and the like of the substrate due to the stress of (1) occur, and the substrate has not been put to practical use.

For example, Japanese Patent Application Laid-Open No. Sho 60-130720 discloses
Discloses a technique of printing and forming color pixels on the outside of a plastic substrate. According to this technology, PR
Since no process is used, the structure of the solvent-resistant film can be simplified. However, in order to form color pixels outside the plastic substrate, a protective film is required on the surface.

Furthermore, the problem of stress has not been solved, and even in this method, a TFT type color liquid crystal display panel has not been put to practical use. On the other hand, JP-A-4-359223 describes a color liquid crystal display electrode substrate in which a color filter, a gas barrier layer and a transparent electrode are integrally formed on a plastic film substrate. Forming a large number of electrodes and thin films as described above has problems in heat resistance, solvent resistance, etc. of the substrate, and there is also a problem that a large-sized display device cannot be manufactured due to its characteristics. It is not the fact.

Further, Japanese Patent Application Laid-Open No. H8-6039 describes a liquid crystal display element in which a photo-curing type bonding material is inserted between a plastic substrate and a glass substrate to bond them together. Discloses only a configuration in which liquid crystal is inserted between the plastic substrate and the glass substrate, but does not disclose anything about a technique using a CF on TFT panel.

Next, Japanese Patent Application Laid-Open Nos. 9-80420 and 10-161104 disclose a liquid crystal element body in which liquid crystal is sealed between two transparent flexible plastic films. This publication describes a color liquid crystal display device in which a color filter is formed on the outer surface of the plastic film.
As in the case of Japanese Patent No. 30720, printing color pixels on the outside of a plastic substrate requires a protective film.
This leads to an increase in the number of steps and cost, and it is impossible to manufacture a low-cost, thin and lightweight color liquid crystal display panel.

[0013]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a TFT type color liquid crystal display panel using a plastic substrate composed of only a plastic sheet and a gas barrier film without a solvent-resistant film. ,
An object of the present invention is to provide a manufacturing method thereof.

[0014]

In order to achieve the above-mentioned object, the present invention employs the following basic technical structure. That is, as a first aspect of the present invention, a panel in which a color filter is formed on a substrate on which a thin film transistor is formed (hereinafter referred to as a CF on TFT panel) and a plastic sheet having a gas barrier film formed on the surface thereof A color liquid crystal display panel comprising: a counter substrate comprising a color filter formed on a substrate on which a thin film transistor is formed; and This is a method of manufacturing a color liquid crystal display panel in which a gas barrier film is used as an upper substrate facing a lower substrate made of a plastic sheet having a surface formed thereon and the two substrates are combined.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The color liquid crystal display panel and the method of manufacturing the color liquid crystal display panel according to the present invention employ the above-described technical configuration. Thin Fil
m Transistor) In a panel in which a color filter is formed on a substrate (hereinafter referred to as a CF on TFT panel), a counter substrate side is a plastic substrate composed of a plastic sheet and a gas barrier film.

Therefore, in the panel having a CF-on-TFT structure according to the present invention, only a solid transparent common electrode is required on the counter substrate side, and the PR process of metal such as chromium does not pass. There is no need to consider chemical and solvent resistance. Therefore, the CF-on TFT of the present invention
The plastic substrate of the panel consists of a plastic sheet coated on both sides with a gas barrier film that blocks the influence of gas from the outside and also blocks the gas generated from inside.

As a result, the effects of the present invention include:
Thin and lightweight color liquid crystal display panel by using plastic substrate. Also, the solvent-resistant film of the plastic substrate as the opposing substrate can be deleted. Further, in order to suppress the thermal expansion of the plastic substrate, it is possible to provide a concave portion in the substrate to provide a normal panel gap.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a semiconductor device according to the present invention. That is, FIG. 1 is a cross-sectional view showing a specific example of the configuration of the color liquid crystal display panel according to the present invention. In the drawing, a panel 50 (FIG. 1) in which color filters 11 and 13 are formed on a substrate 1 on which a thin film transistor is formed. (Hereinafter referred to as CF-on TFT panel) and gas barrier film 1
Plastic sheet 18 having surfaces 9 and 19 'formed thereon
1 shows a color liquid crystal display panel 100 including a counter substrate 17 made of a liquid crystal display.

The plastic sheet 18 used in the present invention is a material having the same light transmittance as glass and having resistance to a solvent for the material for forming the gas barrier films 19 and 19 '. It is desirable to be configured. Further, the plastic sheet 18 according to the present invention.
Is selected from amorphous thermoplastic resins such as polycarbonate, polyarylate, polyether sulfone, and cyclic amorphous polyolefin, and thermosetting resins such as polyfunctional acrylate, polyfunctional polyolefin, unsaturated polyester, and epoxy resin. Preferably, only one plastic material is used.

Further, the material for forming the gas barrier films 19 and 19 'in the present invention is desirably one material selected from polyvinyl alcohol, polyacrylonitrile, and a silicon oxide vapor-deposited film. On the other hand, in the present invention,
As long as the gas barrier film 19 is formed on at least one surface of the plastic sheet 18, it is preferable that the gas barrier films 19 and 19 ′ be formed on both surfaces of the plastic sheet 18. .

A more specific configuration of the color liquid crystal display panel 100 according to the present invention is, for example, the CF-on TFT panel 50 of the plastic sheet 18.
A transparent common electrode 20 and an alignment film 21 are formed on the gas barrier film 19 ′ on the side of the plastic sheet 18, and a polarizing plate 25 is formed on the gas barrier film 19 on the opposite side of the plastic sheet 18.
Is formed on the color liquid crystal display panel 100.

In the color liquid crystal display panel 100 according to the present invention, it is preferable that at least a part of the upper plastic substrate 17 made of the plastic sheet is provided with a recess 27 of an appropriate size. Next, a more specific example of the color liquid crystal display panel 100 according to the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view of a color liquid crystal display device using the CF on TFT panel of the present invention. FIG. 2 is an overall view of a panel having a CF on TFT structure of the present invention. FIG. 1 is a plan view of the pixel portion, and FIG. 1 is a cross-sectional view from the PP ′ region of FIG. 4 and 5 show a process flow of the first embodiment.

First, CF on TF used in the present invention
The configuration and manufacturing method of the base TFT substrate that is the T panel 50 will be described. First, aluminum (Al), molybdenum (Mo), chromium (C
r) and the V-side terminal 3 of 100 to
It is formed with a thickness of 400 nm.

Next, a gate insulating film 4 made of a silicon nitride film or the like and a semiconductor layer 5 made of amorphous silicon are patterned to a thickness of 400 nm and 300 nm, respectively. Next, a source electrode 6, a drain electrode 7, and an H-side terminal 8 as a data terminal portion are formed of Mo, Cr, or the like.
Next, a passivation film 90 made of an inorganic film such as a silicon nitride film is formed to a thickness of 100 to 200 nm by plasma CVD.
Is formed with a thickness of

Next, the structure and manufacturing method of the color filters 11, 13 formed on the base TFT substrate 50 will be described. First, a black matrix 9 as a light-shielding film is patterned on the semiconductor layer 5 of the TFT. As the black matrix 9, a negative photosensitive resist in which carbon or a plurality of pigments is dispersed in an acrylic resin is used.

The film thickness is 1.0-1.5 μm, and the optical density (OD value) is 2-3. At the same time, patterning is also performed on the frame black matrix 10 around the panel. Next, a negative photosensitive resist in which a red pigment is dispersed in an acrylic resin is subjected to a PR process in a range of 1.0 to 1.0.
The red color filter 11 is formed to have a thickness of 1.5 μm.

The color filter pattern has a stripe shape as shown in FIG. Similarly, the green color filter 12 and the blue color filter 13 are similarly patterned. At this time, no color filter is provided on the contact hole 14. Next, overcoat 15
Is flattened by patterning.

The overcoat 15 is made of an acrylic photosensitive resist and has a thickness of 2 to 3 μm. At this time, it is not provided on the contact hole 14. That is, a pattern shape having an opening on the contact hole is used. Further, by etching the passivation film 90 of the base TFT substrate 50, the contact hole 14 is completed.

Next, a pixel electrode 16 is formed on the drain electrode 7 exposed from the contact hole 14 and patterned. The pixel electrode 16 is made of ITO (Indium Tin Oxi
A transparent electrode such as de) is used, and the film thickness is suitably about 100 nm in consideration of workability and the like. Next, the configuration and manufacturing method of the counter substrate side 17 will be described.

FIG. 6 shows a layer structure on the counter substrate side 17 of the present invention. The opposite side plastic substrate 17 has a structure in which a plastic sheet 18 serving as a base material is provided at the center, and gas barrier films 19 and 19 'are provided on the front and back sides. The plastic sheet 18 should be optically anisotropic and isotropic without being anisotropic because it is used inside a polarizing plate, should not be colored, and should have good surface flatness to uniformly align liquid crystals. Are particularly required.

Plastic sheet materials satisfying these required properties include amorphous thermoplastic resins such as polycarbonate, polyarylate, polyether sulfone, and cyclic amorphous polyolefin, polyfunctional acrylates, polyfunctional polyolefins, and unsaturated polyesters. And thermosetting resins such as epoxy resins. The plastic sheet 18 used for the plastic substrate 17 of the present invention was made of a polyether sulfone material in consideration of characteristics such as heat resistance, thermal expansion, and light transmittance. As a method for producing the plastic sheet 18, a solution film forming method, which is more excellent in flatness than a general melt extrusion film forming method, a so-called cast method was used.

The thickness was set to 0.2 to 0.5 mm to aim for a glass substrate. Next, a gas barrier film 19 is formed on the front and back sides with the plastic sheet 18 interposed therebetween. In the case of the plastic sheet 18, the barrier properties against oxygen and water vapor are not good, and when used as a substrate for a liquid crystal panel, it is necessary to coat a gas barrier film to improve those properties. Effective materials for these barrier films include polyvinyl alcohol, polyacrylonitrile, and a silicon oxide deposited film.

The gas barrier film 19 used in the present invention was made of polyvinyl alcohol or a combination of polyvinyl alcohol and silicon oxide. As a method of forming the gas barrier film, a wet coating method was used in consideration of productivity, cost, and the like. Offset printing of a solution containing polyvinyl alcohol and silicon oxide on the plastic sheet 18,
The solvent contained in the solution was evaporated by spin coating or bar coat printing, and then cured to form a gas barrier film by curing.

Next, a transparent common electrode 20 on the opposite side is formed on the surface to be overlapped with the CF on TFT substrate. As a transparent electrode, ITO is patterned into a desired shape by mask sputtering. At this time, since there was a problem with the heat resistance of the plastic sheet, spattering was performed at room temperature.
The film thickness was about 100 nm.

Next, the structure and manufacturing method of a CF on TFT panel manufactured by bonding the CF on TFT substrate 50 manufactured as described above and the opposing plastic substrate 17 will be described. Since the plastic sheet of the present invention uses a polyether sulfone material having a glass transition temperature of 220 ° C., the temperature used in the panel process needs to be lower than that.

Therefore, as the alignment film 21 for controlling the liquid crystal alignment, a low-temperature firing type having a firing temperature of 200 ° C. or less, for example, Optmer AL series manufactured by JSR Corporation was used. As a forming method, patterning was performed into a desired shape by a transfer method such as an offset printing method. After the alignment film 21 was cured by heat treatment, an alignment treatment was performed using a rubbing roll wound with rayon or the like.

Thereafter, a sealing material 22 is formed on the CF-on TFT substrate side by screen printing. As a sealing material, an epoxy resin in which 6.0 μm rod-shaped spacers were dispersed to maintain a panel gap was used, and the curing and firing temperature was 180 ° C. On the other hand, on the counter substrate side, spherical in-plane spacers 23 having a particle size of 4.5 μm are uniformly dispersed in the plane.

The liquid crystal 24 is sealed in the CF-on TFT panel manufactured as described above. On the outer surface of the opposing plastic substrate 17, an opposing polarizing plate 25 is provided.
A TFT-side polarizing plate 26 is attached to the outer surface of the T-side glass substrate 1. Next, the effect of the color liquid crystal display panel using the CF-on TFT panel according to the present invention thus manufactured will be described.

That is, in the present invention, the configuration of the plastic substrate 17 can be simplified. The reason is CF on T
In the case of the panel 50 having the FT structure, the function required on the counter substrate side 17 is only the transparent common electrode, and patterning of other metals is unnecessary. The need for a solvent-resistant film is eliminated.

Therefore, the film for protecting the plastic sheet 18 which is the base material of the plastic substrate is the gas barrier film 1
Only 9 and 19 'are required, and the configuration of the plastic substrate can be simplified. Further, according to the present invention, a TFT type color liquid crystal display panel using the plastic substrate 17 can be provided.

The reason is that the function of the color filter, which has been conventionally used as the counter substrate 17, is concentrated on the TFT substrate, so that the function on the counter side only needs to be the transparent common electrode. This is because it was simplified. Further, according to the present invention, it is possible to reduce the thickness and weight of the TFT type color liquid crystal display panel.

The reason is that, compared with a conventionally used glass substrate, the thickness of the glass substrate is limited to around 0.5 mm, whereas the thickness of the plastic substrate is 0.2 m.
m, and the specific gravity of the material is one-third that of glass, so that it is easy to reduce the thickness and weight. That is, the color liquid crystal display panel according to the present invention is a panel in which a color filter is formed on a TFT (Thin Film Transistor) substrate of the color liquid crystal display panel (hereinafter referred to as CF ON T).
(Referred to as FT panel), the opposite substrate side is a plastic substrate composed of a plastic sheet and a gas barrier film.

As a result, as shown in FIG. 1, in the CF on TFT panel 50 according to the present invention, the counter substrate side 1
7 is a plastic substrate. This plastic substrate 17 is composed of a plastic sheet 18 coated only with a gas barrier film 19. In a panel with a CF on TFT structure, only a solid transparent common electrode is required on the counter substrate side, and the PR process of metal such as chromium does not pass. Therefore, it is necessary to consider chemical resistance and solvent resistance for the counter substrate. There is no.

Next, another specific example of the color liquid crystal display panel 100 according to the present invention will be described. In FIG.
2 shows a second specific example of the color liquid crystal display panel 100 according to the present invention. The configuration and manufacturing method of the CF-on TFT substrate 50 are the same as those of the above-described specific example 1.

The feature of this embodiment is the shape of the opposing plastic substrate 17, and the material and the layer structure are the same as those of the first embodiment. First, a concave portion 27 is provided inside or outside the position where the plastic substrate 18 contacts the sealing material 22 provided at the edge of the color liquid crystal display panel. The recess 27 is formed, for example, by making a cut in the plastic sheet 18.

The depth of the recess 27 is about one third of the plastic sheet, and the width is 100 to 200 μm. or,
The position at which the concave portion 27 is formed is not particularly limited, but is preferably provided very close to the seal 22.
Since the concave portion 27 absorbs thermal expansion of the plastic substrate due to heat applied during firing of the alignment film and curing of the sealing material, expansion of the plastic substrate is suppressed, and a normal panel gap can be provided.

That is, in this embodiment, at least a part of the upper substrate 17 composed of the plastic sheet 18 is provided with a suitable concave portion 27, and more preferably, the plastic sheet 18 The CF
It is desirable to provide at least one recess 27 on at least a part of the surface facing the on-TFT panel 50.
Further, in the present invention, the concave portion 27 is provided in a portion corresponding to the sealing material 22 provided in the peripheral portion of the upper substrate 17 made of the plastic sheet 18 or in the vicinity thereof. May be.

FIG. 8 shows a third specific example of the color liquid crystal display panel 100 according to the present invention. That is,
The feature of the third specific example is that the concave portion 27 is formed directly below the sealing material 22. Thereby, the same effect as in the second specific example can be obtained. Further, FIG. 9 shows a fourth specific example of the color liquid crystal display panel 100 according to the present invention. In the figure, the concave portions 27 are provided at three places inside, outside, and immediately below the seal material 22. An example is shown. Thereby, the same effect as in the above specific example can be obtained.

As is clear from the above description, the method for manufacturing the color liquid crystal display panel 100 according to the present invention includes, for example, a panel in which a color filter is formed on a substrate on which a thin film transistor is formed (hereinafter referred to as a CF on TFT panel). ) Is used as a lower substrate, and a gas barrier film is used as an upper substrate opposed to the lower substrate made of a plastic sheet formed on the surface, so that the two substrates are combined. Yes, and as the plastic sheet, has the same light transmittance as glass,
In addition, a material having resistance to a solvent for the material for forming the gas barrier film is selected.

In the method for manufacturing a color liquid crystal display panel according to the present invention, the plastic sheet is
Amorphous thermoplastic resins such as polycarbonate, polyarylate, polyethersulfone, and cyclic amorphous polyolefin, and polyfunctional acrylates and polyfunctional polyolefins,
It is configured to use one plastic material selected from thermosetting resins such as unsaturated polyester and epoxy resin, and the material for forming the gas barrier film is polyvinyl alcohol, polyacrylonitrile And one material selected from a silicon oxide deposited film.

In the method of manufacturing a color liquid crystal display panel according to the present invention, the gas barrier film may be formed on both surfaces of the plastic sheet. Further, in the method for manufacturing a color liquid crystal display panel according to the present invention, a transparent common electrode and an alignment film are formed on the gas barrier film on the CF on TFT panel side of the plastic sheet. Alternatively, the polarizing plate may be formed on the gas barrier film on the opposite side of the plastic sheet.

As described above, in the method of manufacturing a color liquid crystal display panel according to the present invention, at least a part of the plastic sheet at least on a surface facing the CF on TFT panel is provided. It is also desirable to provide at least one recess. In this case, it is preferable that the concave portion is provided at a portion corresponding to a sealing material provided at a peripheral portion of the plastic sheet or at a portion in the vicinity thereof.

[0054]

The color liquid crystal display panel and the method of manufacturing the same according to the present invention employ the above-mentioned technical structure, and therefore, are more effective than the conventional color liquid crystal display panel using a glass substrate. By using a plastic substrate, the color liquid crystal display panel can be made thinner and lighter, and the cost can be reduced.

Further, since the solvent-resistant film on the plastic substrate as the opposing substrate can be eliminated, the manufacturing process can be shortened, and the cost can be further reduced. Also, to suppress the thermal expansion of the plastic substrate,
It is also possible to provide a recess in the substrate to provide a normal panel gap.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a specific example of a color liquid crystal display panel according to the present invention.

FIG. 2 is a plan view of a specific example of a color liquid crystal display panel according to the present invention.

FIG. 3 is a plan view showing a configuration of a pixel portion in a specific example of the color liquid crystal display panel according to the present invention.

FIG. 4 is a cross-sectional view showing a configuration in a main step in a specific example of a method for manufacturing a color liquid crystal display panel according to the present invention.

FIG. 5 is a cross-sectional view showing a configuration of a main step in a specific example of a method for manufacturing a color liquid crystal display panel according to the present invention.

FIG. 6 is a cross-sectional view showing an example of a configuration of an opposing (upper) substrate used in the color liquid crystal display panel according to the present invention.

FIG. 7 is a cross-sectional view showing a configuration of another specific example of the color liquid crystal display panel according to the present invention.

FIG. 8 is a sectional view showing a configuration of another specific example of the color liquid crystal display panel according to the present invention.

FIG. 9 is a cross-sectional view showing a configuration of still another specific example of the color liquid crystal display panel according to the present invention.

FIG. 10 is a cross-sectional view showing an example of a configuration of an opposing (upper) substrate used in a conventional color liquid crystal display panel.

FIG. 11 is a cross-sectional view showing a configuration example of a conventional color liquid crystal display panel using a CF on TFT panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... Gate electrode 3 ... V side terminal 4 ... Gate insulating film 5 ... Semiconductor layer 6 ... Source electrode 7 ... Drain electrode 8 ... H side terminal 9 ... Black matrix 10 ... Frame black matrix 11 ... Red color filter 12 ... Green color filter 13 Blue color filter 14 Contact hole 15 Overcoat 16 Pixel electrode 18 Plastic sheet 17 Counter substrate, upper substrate, upper plastic substrate 19, 19 ′ Gas barrier film 20 Transparent common electrode 21 Alignment film 22 ... Sealing material 23 ... Spherical in-plane spacer 24 ... Liquid crystal 25 ... Opposite polarizing plate 26 ... TFT side polarizing plate 27 ... Recess 50 ... CF on TFT panel 90 ... Passivation film 100 ... Color liquid crystal display panel

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Michiaki Sakamoto, Inventor 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Shinichi Nakata 5-7-1 Shiba, Minato-ku, Tokyo Japan Inside Electric Co., Ltd. (72) Inventor Takahiko Watanabe 5-7-1 Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Shuken Yoshikawa 5-7-1 Shiba, Minato-ku, Tokyo NEC (72) Inventor Hiroshi Ihara 5-7-1 Shiba, Minato-ku, Tokyo NEC F Company (Reference) 2H089 LA07 QA11 TA01 TA09 TA12 TA15 2H090 JB03 JC07 JD08 JD11 LA04 LA15 5C094 AA15 BA03 BA43 CA19 CA24 EB02 ED03 GB01 HA02 HA03 HA08

Claims (16)

[Claims] A panel in which a color filter is formed on a substrate on which a thin film transistor is formed (hereinafter referred to as a CF on TFT).
And a counter substrate made of a plastic sheet having a gas barrier film formed on the surface thereof. 2. The plastic sheet according to claim 1, wherein the plastic sheet is made of a material having light transmittance equivalent to that of glass and having resistance to a solvent for a material for forming the gas barrier film. 2. The color liquid crystal display panel according to 1. 3. The plastic sheet is made of an amorphous thermoplastic resin such as polycarbonate, polyarylate, polyether sulfone, or cyclic amorphous polyolefin, or a polyfunctional acrylate, polyfunctional polyolefin, unsaturated polyester, epoxy resin, or the like. 3. The color liquid crystal display panel according to claim 2, wherein one plastic material selected from a thermosetting resin or the like is used. 4. The color liquid crystal display panel according to claim 1, wherein the material for forming the gas barrier film is one material selected from polyvinyl alcohol, polyacrylonitrile, and a silicon oxide deposition film. . 5. The plastic sheet according to claim 1, wherein said gas barrier films are formed on both sides of said plastic sheet.
A color liquid crystal display panel according to any one of claims 1 to 4. 6. A transparent common electrode and an alignment film are formed on the gas barrier film on the CF on TFT panel side of the plastic sheet, and a polarizing plate is formed on the gas barrier film on the opposite side of the plastic sheet. The color liquid crystal display panel according to claim 1, wherein the color liquid crystal display panel is formed. 7. The plastic sheet according to claim 1, wherein at least a part of a surface of the plastic sheet facing the CF-on TFT panel is provided with at least one concave portion. The described color liquid crystal display panel. 8. The plastic sheet according to claim 7, wherein the concave portion is provided at a portion corresponding to a sealing material provided at a peripheral portion of the plastic sheet or at a portion in the vicinity thereof.
The described color liquid crystal display panel. 9. A panel in which a color filter is formed on a substrate on which a thin film transistor is formed (hereinafter referred to as a CF on TFT).
A liquid crystal panel, wherein the lower substrate is used as a lower substrate, and a gas barrier film is used as an upper substrate opposed to the lower substrate made of a plastic sheet having a surface formed thereon. Display panel manufacturing method. 10. The plastic sheet is made of a material having the same light transmittance as glass and having a resistance to a solvent for a material for forming the gas barrier film. Method for manufacturing a color liquid crystal display panel. 11. The plastic sheet is made of an amorphous thermoplastic resin such as polycarbonate, polyarylate, polyether sulfone, or cyclic amorphous polyolefin, or a polyfunctional acrylate, polyfunctional polyolefin, unsaturated polyester, epoxy resin, or the like. The method for manufacturing a color liquid crystal display panel according to claim 9, wherein one plastic material selected from a thermosetting resin or the like is used. 12. The gas barrier film according to claim 9, wherein a material selected from the group consisting of polyvinyl alcohol, polyacrylonitrile, and a silicon oxide deposited film is used. A method for manufacturing a color liquid crystal display panel. 13. The method for manufacturing a color liquid crystal display panel according to claim 9, wherein said gas barrier film is formed on both surfaces of said plastic sheet. 14. A transparent common electrode and an alignment film are formed on the gas barrier film on the CF on TFT panel side of the plastic sheet, and a polarizing plate is formed on the gas barrier film on the opposite side of the plastic sheet. 14. The method of manufacturing a color liquid crystal display panel according to claim 9, wherein: 15. The color according to claim 9, wherein at least one recess is provided in at least a part of a surface of the plastic sheet facing the CF on TFT panel. A method for manufacturing a liquid crystal display panel. 16. The method for manufacturing a color liquid crystal display panel according to claim 15, wherein the concave portion is provided at a portion corresponding to a sealing material provided at a peripheral portion of the plastic sheet or at a portion in the vicinity thereof. .