JPH0694908A - Production of color filter - Google Patents

Abstract

PURPOSE:To produce a high-precision color filter at a low cost and with high throughput by transferring a substance electrodeposited on the conductive surface of a substrate to a coating layer to obtain a corrosion-resistant material. CONSTITUTION:A coloring material in which a red pigment is dispersed is applied on a black-matrix substrate 12 having a black matrix 14 on a transparent substrate 13, heat-treated and cured to form a coating layer 7R contg. the red pigment. An adhesive or tacky coating film 9 is then formed on the coating layer 7R, a substrate 2 coated with an electrodeposition substance 6 for a red pattern is brought into contact with the coating film 9 to transfer the substance 6 to a specified position on the coating film 9. The coating film 9 and coating layer 7R are etched off with the substance 6 transferred on the coating film 9 as a corrosion-resistant material, and the substance 6 is then released to form a red pattern 16R. Similarly, a green pattern and a blue pattern are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a color filter, and more particularly to a method for manufacturing a color filter used in a liquid crystal display or the like.

[0002]

2. Description of the Related Art In recent years, a monochrome or color liquid crystal display (LCD) has attracted attention as a flat display. Color liquid crystal displays include an active matrix system and a simple matrix system for controlling three primary colors, and a color filter is used in each system. In the liquid crystal display, the constituent pixel portions are set to the three primary colors (R, G, B), and transmission of each light of the three primary colors is controlled by electrical switching of the liquid crystal to perform color display.

This color filter has R,
The colored layer of each of G and B is provided, the black matrix located at the boundary of each pixel, the protective layer, and the transparent electrode layer.

Conventionally, as a method of manufacturing a color filter, a dyeing method is applied in which a dyeing base material is applied and a pattern formed by exposing and developing through a photomask is dyed, and a color pigment is dispersed in advance in a photosensitive resist. In addition, a pigment dispersion method of exposing and developing through a photomask, a printing method of printing each color with a printing ink, a conductive film on a substrate is exposed through a photomask and patterned, and an electrophoretic coloring layer is formed. And the like. In products such as liquid crystal color televisions and liquid crystal displays for computers, which are required to be popular, quality and cost reduction are the most important problems, and therefore reduction in manufacturing cost is desired.

[0005]

However, in the color filter manufacturing method described above, the photoprocess is repeatedly used except for the printing method, and therefore, when manufacturing a large area color filter, a large exposure apparatus is required. There are problems that a large number are required, the manufacturing cost is high, and the throughput (processing speed) is low. Further, the printing method has been expected to reduce the manufacturing cost because the process is simple, but it cannot be used for a thin film transistor (TFT) type liquid crystal display due to its poor quality, and the yield of non-defective products at the time of manufacturing is low. The reduction in manufacturing cost was not obtained.

The present invention has been made in view of the above circumstances, and provides a highly accurate color filter used for a flat display such as a liquid crystal display, an imager such as a CCD, or a color sensor at a low manufacturing cost. It is an object of the present invention to provide a method for manufacturing a color filter that can be manufactured with high throughput.

[0007]

In order to achieve such an object, the present invention provides a coating layer in which a coloring material in which a pigment is dispersed is applied on a black matrix substrate having a black matrix on the surface of a transparent substrate. And at least the surface of the electrodeposited substance deposited on the conductive surface of the electrodeposited substrate formed by forming a master pattern of a desired colored pattern with an electrically insulating material on the surface of the substrate having electrical conductivity in the coating layer. A transfer is performed as a corrosion resistant material, a portion of the coating layer where the corrosion resistant material is not provided is removed to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors. It was configured.

In the present invention, a dyeing base material is coated on a black matrix substrate having a black matrix on the surface of a transparent substrate to form a coating layer, and at least the surface of the substrate is electrically conductive on the surface of the substrate. The electrodeposited substance deposited on the conductive surface of the electrodeposited substrate on which a master pattern of a desired coloring pattern is formed is transferred to the coating layer as a corrosion resistant material, and the corrosion resistant material is provided in the coating layer. After removing the unpainted portion, the remaining coating layer was dyed to form a desired coloring pattern, and this operation was repeated to form a coloring layer having a predetermined number of colors.

Further, the present invention is an electrodeposition in which a pigment is dispersed on the conductive surface of an electrodeposition substrate in which a master pattern having a desired coloring pattern is formed of an electrically insulating material on the surface of a substrate having at least a surface of conductivity. A substance is deposited, the deposited electrodeposition substance is transferred onto a black matrix substrate having a black matrix on the surface of a transparent substrate to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors. Is formed.

Further, according to the present invention, a dyed base material is contained in the conductive surface of an electrodeposited substrate having a master pattern of a desired colored pattern formed of an electrically insulating material on at least the surface of the substrate having conductivity. Deposit the electrodeposited material,
The deposited electrodeposition material is transferred and dyed on a black matrix substrate having a black matrix on the surface of a transparent substrate to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors. It was configured like this.

Further, an electrodeposition material in which a dyeing base material is contained on the conductive surface of an electrodeposition substrate in which a master pattern having a desired coloring pattern is formed of an electrically insulating material on the surface of a substrate having at least surface conductivity. After depositing and staining,
The above-mentioned deposition electrodeposition material is transferred onto a black matrix substrate having a black matrix on the surface of a transparent substrate to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors. It was configured.

[0012]

The function of the electrodeposition material deposited on the electrodeposition substrate is transferred onto the coating layer made of a coloring material or a dyeing base material, and the transferred electrodeposition material is used as a corrosion-resistant material to remove the coating layer to form a colored pattern. The electrodeposition material containing the pigment or dyeing base material that has been formed or deposited on the electrodeposition substrate is transferred onto the black matrix substrate to form a colored pattern, whereby the photoprocess is performed except when the electrodeposition substrate is formed. Is unnecessary.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an example of an active matrix type liquid crystal display (LCD) using a color filter manufactured according to the present invention, and FIG. 2 is a schematic sectional view of the same. 1 and 2, the LCD 1 includes a color filter 10 and a transparent glass substrate 2.
0 is made to face each other via a seal member 30, and a twisted nematic (TN) liquid crystal has a thickness of about 5 to 10 μm therebetween.
The liquid crystal layer 40 is formed to a certain degree, and the color filter 10
The polarizing plates 50 and 51 are arranged outside the transparent glass substrate 20.

FIG. 3 is an enlarged partial cross-sectional view of the color filter 10. The color filter 10 includes a black matrix substrate 12 in which a black relief (black matrix) 14 is formed on a transparent substrate 13, and a black on the black matrix substrate 12. Coloring layer 16 formed between matrices 14, black matrix 14 and coloring layer 1
6 is provided with a protective layer 18 and a transparent common electrode 19. The color filter 10 is arranged such that the transparent common electrode 19 is located on the liquid crystal layer 40 side. The colored layer 16 is a red pattern 16R,
It is composed of green patterns 16G and blue patterns 16B, and the arrangement of each colored pattern is a mosaic arrangement as shown in FIG. The arrangement of the coloring pattern is not limited to this, and may be a triangular arrangement, a stripe arrangement, or the like.

Display electrodes 22 are provided on the transparent glass substrate 20 so as to correspond to the colored patterns 16R, 16G, 16B, and each display electrode 22 has a thin film transistor (TFT) 24. Further, a scanning line (gate electrode busbar) 26a and a data line 26b are arranged between the respective display electrodes 22 so as to correspond to the black matrix 14.

In such an LCD 1, each of the colored patterns 16R, 16G and 16B forms a pixel, and the display electrode corresponding to each pixel is turned on and off in a state where illumination light is irradiated from the polarizing plate 51 side, thereby turning on and off the liquid crystal layer. 40 operates as a shutter, and irradiation light is transmitted through each pixel of each of the colored patterns 16R, 16G, and 16B to perform color display.

As the transparent substrate 13 of the color filter 10, a rigid material such as quartz glass, low expansion glass, soda lime glass, or the like, or a flexible material such as a transparent resin film or an optical resin plate is used. Materials can be used. Among them, 70 made by Corning
59 glass is a material with a small coefficient of thermal expansion, has excellent dimensional stability and workability in high-temperature heat treatment, and is a non-alkali glass that does not contain alkali components in the glass, so it is a color for LCDs using the active matrix method Suitable for filters.

Next, the manufacture of the color filter according to the present invention will be described with reference to FIGS. First, the production of the electrodeposition substrate used in the production of the color filter according to the present invention will be described with reference to FIG. In the production of the electrodeposition substrate 2, at least the surface of the substrate 3 having conductivity is coated with an electrically insulating photoresist to form a resist layer 4 (FIG. 4A). Next, a photomask 5R corresponding to a desired colored pattern, for example, a red pattern
The resist layer 4 is exposed through (FIG. 4 (B)). After that, it is developed and dried, and the red master pattern 4
By forming R, the electrodeposited substrate 2 is obtained (FIG. 4 (C)).
If necessary, the master pattern 4R may be subjected to a heat treatment so as to have higher printing durability. Then, other colored patterns (green pattern 4G and blue pattern 4
For B (not shown)), the electrodeposited substrate is similarly manufactured.

As the substrate 3 used for the electrodeposition substrate 2, a conductive substrate such as a metal plate may be used, or tin oxide, indium tin oxide (ITO),
It may have a layer formed of a conductive material such as carbon. In addition, the conductive surface of the substrate 3 enables adhesion of an electrodeposition material described later and transfer onto a transparent substrate,
It is preferable that the film has a mirror surface to some extent and has a weak adhesive force to the electrodeposition material. Therefore, when the material of the conductive surface of the substrate 3 is a metal such as stainless steel or copper, it is preferable that the conductive surface of the substrate 3 is further plated with nickel or chromium.

Further, in the above example, the master pattern 4R (4G, 4G) is formed by using the photoresist having the electric insulation property.
B) is formed, but is an electrically insulating material Si
An insulating film made of an inorganic material such as N _x or SiO ₂ or T
Alternatively, the master pattern 4R (4G, 4B) may be formed by forming a film on the substrate 3 by anodizing i, Ta or the like to provide electrical insulation and performing patterning corresponding to a desired coloring pattern.

In order to electrodeposit an electrodeposition material on such an electrodeposition substrate 2, the electrodeposition substrate 2 is immersed together with the counter electrode in an electrodeposition bath containing an electrodeposition component, and the electrodeposition substrate is used as one electrode. As a result, the electrodeposited substance 6 is deposited on the conductive surface of the electrodeposited substrate other than the master pattern forming portion (FIG. 4 (D)). Further, if necessary, the electrodeposited substrate on which electrodeposition has been completed is washed and dried.

Next, a first mode of manufacturing the color filter of the present invention using the above electrodeposited substrate will be described with reference to FIGS. First, a coloring material in which a red pigment is dispersed is applied to the black matrix substrate 12 in which the black matrix 14 is formed on the transparent substrate 13 to a thickness of 0.5 to
It is applied so as to have a thickness of about 2.0 μm and heat treated (100 to
The coating layer 7R containing a red pigment is formed by curing at 200 ° C. for about 10 to 30 minutes (FIG. 5A).
Next, an adhesive or tacky coating 9 is formed on the coating layer 7R.
Is formed (FIG. 5 (B)), and the electrodeposition substrate 2 (electrodeposition substrate for red pattern) on which the electrodeposition material 6 is electrodeposited as described above is brought into contact with the coating film 9 (FIG. 5 (C)), The electrodeposited substance 6 is transferred to a predetermined position on the coating film 9 (a position where the red pattern 16R between the black matrices 14 is formed) (FIG. 5D).
Then, the coating 9 and the coating layer 7R are removed by etching using the electrodeposition material 6 transferred onto the coating 9 as a corrosion resistant material (FIG. 5 (E)), and the electrodeposition material 6 as a corrosion resistant material is peeled and removed. The red pattern 16R is formed (see FIG. 5).
(F)).

Next, a coloring material in which a green pigment is dispersed is applied to the black matrix substrate 12 having the red pattern 16R formed thereon to form a coating layer 7G containing the green pigment, and an electrodeposition substrate for the green pattern is formed. The electrodeposited material 6 is transferred to a predetermined position on the coating film 9 (a position where the green pattern 16G between the black matrices 14 is formed) by using (FIG. 6).
(A)). Then, the coating 9 and the coating layer 7G are removed by etching using the electrodeposition material 6 transferred onto the coating film 9 as a corrosion resistant material, and the electrodeposition material 6 serving as a corrosion resistant material is peeled off to form a green pattern 16G ( FIG. 6B).

Similarly, the blue pattern 16B is formed on the black matrix substrate 12 on which the red pattern 16R and the green pattern 16G are formed to form the colored layer 16 (FIG. 6C).

Then, the colored layer 1 formed as described above.
6 (red pattern 16R, green pattern 16G and blue pattern 16B) and the black matrix 14 are covered with a protective layer 18 and a transparent common electrode 19 to form the color filter 10.

A second mode of the method for manufacturing a color filter according to the present invention will be described with reference to FIG. First, a dyeing base material having a thickness of 0.5 to 5 is formed on the black matrix substrate 12 in which the black matrix 14 is formed on the transparent substrate 13.
It is applied to a thickness of about 2.0 μm and heat treated (80-1
The coating layer 8 having a dyeability is formed by curing at 20 ° C. for about 10 to 30 minutes (FIG. 7A). Next, an adhesive or tacky coating 9 is formed on the coating layer 8, and the electrodeposition substrate 2 (electrodeposition substrate for red pattern) on which the electrodeposition material 6 is electrodeposited as described above is applied to the coating 9. The electrodeposited material 6 is brought into contact with each other and transferred to a predetermined position on the coating film 9 (position where the red pattern 16R between the black matrices 14 is formed) (FIG. 7).
(B)). Then, the coating 9 and the coating layer 8 are removed by etching using the electrodeposition material 6 transferred onto the coating 9 as a corrosion resistant material, and the electrodeposition material 6 as a corrosion resistant material is peeled off to be dyed corresponding to the red pattern. A pattern 8R is formed (FIG. 7C). Then, after the pattern 8R to be dyed is dyed, it is fixed with tannic acid or the like, and the red pattern 16
Let R.

Similarly, the green pattern 16G and the blue pattern 16B are formed using the electrodeposited substrate for the green pattern and the electrodeposited substrate for the blue pattern to form the colored layer 16 (FIG. 7D).

Then, the colored layer 1 formed as described above.
6 (red pattern 16R, green pattern 16G and blue pattern 16B) and the black matrix 14 are covered with a protective layer 18 and a transparent common electrode 19 to form the color filter 10.

Further, a third mode of the method for manufacturing a color filter according to the present invention will be described with reference to FIG. First,
As described above, the electrodeposition material 6R containing the red pigment is deposited on the conductive surface of the electrodeposition substrate 2 (the electrodeposition substrate for the red pattern) using the electrodeposition bath containing the red pigment and the electrodeposition component. Then, after pulling up the electrodeposited substrate 2 from the electrodeposition bath, the electrodeposited substrate is washed and dried if necessary, and heat treated (80 to 120).
C., about 10 to 30 minutes) (FIG. 8A).

On the other hand, the electrodeposited substrate 2 in which the adhesive or tacky coating 9 is formed on the black matrix substrate 12 in which the black matrix 14 is formed on the transparent substrate 13 and the electrodeposition material 6R is electrodeposited as described above. Is brought into contact with the coating film 9 (FIG. 8B), and the electrodeposited material 6R is transferred to a predetermined position on the coating film 9 (position where the red pattern 16R between the black matrices 14 is formed) to form the red pattern 16R. (FIG. 8C).

Similarly, the electrodeposition material 6G containing the green pigment is deposited on the electrodeposition substrate for the green pattern, and the electrodeposition material 6B containing the blue pigment is deposited on the electrodeposition substrate for the blue pattern. As described above, the green pattern 16G and the blue pattern 16B are formed to configure the colored layer 16 (see FIG. 8).
(D)).

Then, the colored layer 1 formed as described above.
6 (red pattern 16R, green pattern 16G and blue pattern 16B) and the black matrix 14 are covered with a protective layer 18 and a transparent common electrode 19 to form the color filter 10.

A fourth mode of the method for manufacturing a color filter according to the present invention will be described with reference to FIG. First, an electrodeposition substrate 2 (electrodeposition substrate for red pattern) is used as described above using an electrodeposition bath containing a dyeing base material and an electrodeposition component.
The electrodeposited material 6'containing the dyeing base material is deposited on the conductive surface of. Then, after pulling up the electrodeposition substrate 2 from the electrodeposition bath,
If necessary, the electrodeposited substrate may be washed and dried, and heat treated (80
~ 120 ° C, about 10-30 minutes) (Fig. 9)
(A)).

On the other hand, an electrodeposition substrate in which an adhesive or tacky coating 9 is formed on a black matrix substrate 12 in which a black matrix 14 is formed on a transparent substrate 13 and the electrodeposition material 6'is electrodeposited as described above. 2 is brought into contact with the coating 9 (FIG. 9 (B)), and the electrodeposited material 6'is transferred to a predetermined position on the coating 9 (position where the red pattern 16R between the black matrices 14 is formed) to correspond to the red pattern. The dyed pattern 6'R is formed (FIG. 9C). Then, after this dyed pattern 6'R is dyed, it is fixed with tannic acid or the like to obtain a red pattern 16R (FIG. 9).
(D)).

On the black matrix substrate 12 on which the red pattern 16R is thus formed, the green pattern 16G and the blue pattern 16B are formed by using the green pattern electrodeposition substrate and the blue pattern electrodeposition substrate in the same manner as described above. Then, the colored layer 16 is formed (FIG. 9E).

Then, the colored layer 1 formed as described above.
6 (red pattern 16R, green pattern 16G and blue pattern 16B) and the black matrix 14 are covered with a protective layer 18 and a transparent common electrode 19 to form the color filter 10.

A fifth mode of the method for manufacturing a color filter according to the present invention will be described with reference to FIG. First,
An electrodeposition material containing a dyeing base material on the conductive surface of the electrodeposition substrate 2 (the electrodeposition substrate for the red pattern) as described above using an electrodeposition bath containing a dyeing base material having a dyeing property and an electrodeposition component 6'is deposited. Then, after the electrodeposition substrate 2 is pulled out from the electrodeposition bath, the electrodeposition substrate is washed and dried if necessary, and heat treatment (80 to 120 ° C., about 10 to 30 minutes) is performed (FIG. 1).
0 (A)). Next, this electrodeposited material 6'is dyed and then fixed with tannic acid or the like to form a transferred red pattern 6'R (FIG. 10 (B)).

On the other hand, an electrodeposition substrate having an adhesive or tacky coating 9 formed on a black matrix substrate 12 in which a black matrix 14 is formed on a transparent substrate 13 and having a transferred red pattern 6'R as described above. 2 is brought into contact with the film 9 (FIG. 10 (C)), and the transferred red pattern 6'R
Is transferred to a predetermined position on the film 9 (a position where the red pattern 16R is formed between the black matrices 14) to form a red pattern 16R (FIG. 10D).

On the black matrix substrate 12 thus formed with the red pattern 16R, the green pattern 16G and the blue pattern 16B are formed by using the green pattern electrodeposition substrate and the blue pattern electrodeposition substrate in the same manner as described above. The colored layer 16 is formed and formed (FIG. 10E).

The black matrix substrate 12 used in each of the above-mentioned embodiments has a relief formed by etching a vapor-deposited chrome film formed on the transparent substrate 13, and a dyed hydrophilic resin relief formed on the transparent substrate 13. , A relief formed on a transparent substrate 13 using a photosensitive solution in which a black pigment is dispersed, a transparent electrode having a pattern for a black matrix is formed on the transparent substrate 13, and a black electrodeposition paint is electrodeposited to form a relief. It is possible to use the above-mentioned one, the one in which a black relief is formed on the transparent substrate 13 by printing, or the like.

The electrodeposition materials used as the corrosion-resistant material in the above-mentioned first and second modes are Ni, Cr, Fe and A.
Metals such as g, Au, Cu, Zn, Sn, or compounds or alloys thereof, or natural fats / oils, synthetic oils, alkyd resins, polyester resins, acrylic resins,
Examples include various organic polymer substances such as epoxy resin type. Further, those having a depositability on the conductive surface of the electrodeposited substrate due to a reaction with an electrolyzed component in the vicinity of the electrode can be similarly used.

Further, as the resin used for the colored coating material in which the pigment is dispersed in the above-mentioned first embodiment, acrylic resin, polyamino resin (polyimide resin, polyamide resin), epoxy resin, urethane resin, polycarbonate resin , Silicone resins and the like.

The pigments used in the present invention include azo pigments such as soluble azo pigments, insoluble azo pigments, condensed azo pigments, phthalocyanine pigments, indigo pigments, anthraquinone pigments, perylene pigments, perinone pigments, dioxazine pigments, and quinacridone pigments. , Condensed polycyclic pigments including isoindolinone pigments, phthalone pigments, methine / azomethine pigments, or metal complex pigments, or any mixture thereof.

The dyeing base material used in the second and fourth embodiments is polyvinyl alcohol, a copolymer of methacrylic acid or acrylic acid, low molecular weight gelatin,
It can be dyed with acid dyes such as glue and casein.

Further, the above-mentioned adhesive or tacky coating 9
Can be formed by a vinyl chloride / vinyl acetate copolymer system, a natural or synthetic rubber system, various acrylate systems, epoxy systems, other general-purpose pressure-sensitive adhesives, thermoplastic heat-sensitive adhesives, photocurable adhesives, and the like.

The above-mentioned protective layer 18 is provided for smoothing the surface of the color filter 1, improving the reliability, and for the liquid crystal display (L).
The purpose is to prevent the liquid crystal layer from being contaminated when used in a CD), and a transparent resin such as an acrylic resin, an epoxy resin or a polyimide resin, or a transparent inorganic compound such as silicon dioxide is used. Can be formed. The thickness of such a protective layer is preferably about 0.5 to 50 μm.

As the transparent common electrode 19, an indium tin oxide (ITO) film or the like can be used. I
The TO film can be formed by a known method such as a vapor deposition method or a sputtering method, and the thickness thereof is preferably about 200 to 2000Å.

Next, the present invention will be described in more detail with reference to experimental examples. (Experimental Example 1) First, electrodeposition substrates for red pattern, green pattern and blue pattern were prepared. That is, a stainless plate with a high surface flatness (thickness = 0.2 mm)
Photoresist (OMR manufactured by Tokyo Ohka Co., Ltd.) was applied on the surface of the above by a spin coating method (rotation speed = 1500 rpm) to a thickness of 1 μm. Then, it was exposed through a photomask for a predetermined colored pattern, developed and dried to prepare each electrodeposited substrate.

Next, the entire back surface of the electrodeposited substrate prepared as described above and the portion not requiring electrodeposition on the front surface were covered with an electrically insulating tape and then washed. Then, using the electrodeposited substrate as the anode and the platinum electrode as the cathode, the electrode gap was soaked in a copper pyrophosphate bath that the electrode gap was 200 mm, and current was applied to electrodeposit Cu (thickness = 1 μm), and further cleaning was performed.

On the other hand, a black matrix substrate in which a black matrix is formed on a transparent glass substrate and a coloring material in which a red pigment (naphthol red) is dispersed in a polyimide resin are prepared, and the coloring material is formed on the black matrix substrate by a roller coating method. And apply at 150 ℃ for 15
A heat treatment was applied under the condition of a minute for curing to form a red coating layer (thickness = 1 μm).

Next, an adhesive was applied on the above red coating layer by a spin coating method (rotation speed = 3000 rpm) to a thickness of 1.5 μm to form an adhesive thin film. After that, the electrodeposition substance (Cu) of the above electrodeposition substrate for red pattern was transferred onto this adhesive thin film. Then, using the transferred electrodeposition material (Cu) as a corrosion-resistant material, first, the adhesive thin film in the non-image area other than the Cu pattern is removed by a dry etching method using O ₂ plasma, and the black matrix substrate is further etched with an etching solution (hydroxide). It was dipped in a 4% aqueous solution of sodium) to remove the red coating layer in the non-image area. Next, the Cu pattern was peeled off and removed with ferric chloride to form a red pattern.

Next, except that a coloring material using a green pigment: phthalocyanine green was used in place of the red pigment, and the electrodeposition material (Cu) of the electrodeposition substrate for green pattern was transferred onto the adhesive thin film. A green pattern was formed in the same manner as the red pattern formation of.

Further, a blue pigment: a coloring material using copper phthalocyanine blue was used in place of the red pigment, and the electrodeposition material (Cu) of the electrodeposition substrate for blue pattern was transferred onto the adhesive thin film. A blue pattern was formed in the same manner as the red pattern formation of.

After that, a protective layer is formed so as to cover the colored layer formed of the red pattern, the green pattern and the blue pattern formed as described above and the black matrix,
Further, a transparent common electrode (ITO) was formed on the protective layer. (Experimental Example 2) In the same manner as in Experimental Example 1, electrodeposited substrates for red pattern, green pattern and blue pattern were prepared, and Cu was electrodeposited on each electrodeposited substrate.

Next, a black matrix substrate similar to that used in Experimental Example 1 was prepared, and a dyeing base material containing casein as a main component was applied onto the black matrix substrate by a roller coating method, and 90 ° C. for 15 minutes. A heat treatment was performed under the conditions described above to form a coating layer (thickness = 1 μm) containing the dyed substrate.

Next, a pressure-sensitive adhesive was applied onto the above coating layer by a spin coating method (rotation speed = 3000 rpm) to a thickness of 1.5 μm.
It was applied so as to have a thickness of m to form an adhesive thin film. After that, the electrodeposition substance (Cu) of the above electrodeposition substrate for red pattern was transferred onto this adhesive thin film. Then, using the transferred electrodeposition material (Cu) as a corrosion-resistant material, first, the adhesive thin film in the non-image area other than the Cu pattern is removed by a dry etching method using O ₂ plasma, and the black matrix substrate is further etched with an etching solution (hydroxide). The coating layer in the non-image area was removed by immersing in a 4% aqueous solution of sodium). Next, the Cu pattern was peeled off and removed with ferric chloride to form a dyed pattern for a red pattern.

Then, the black matrix substrate was immersed in a red dyeing solution having the following composition to dye the pattern to be dyed, and the dyeing pattern was fixed with tannic acid to form a red pattern.

(Composition of Red Dyeing Solution) ・ Kayanol Milling Red RS (manufactured by Nippon Kayaku Co., Ltd.)… 10 g ・ Acetic acid… 10 cc ・ Pure water… 1000 cc Next, green pattern electrodeposition on the adhesive thin film A green pattern was formed in the same manner as the above red pattern formation, except that the electrodeposition material (Cu) on the substrate was transferred and the green dyeing solution having the following composition was used instead of the red dyeing solution.

(Composition of Green Staining Solution) Suminol Milling Brilliant Green 5G (manufactured by Nippon Kayaku Co., Ltd.) 5 g Acetic acid 10 cc Pure water 1000 cc Further, electrodeposition for blue pattern on the adhesive thin film A blue pattern was formed in the same manner as the above-mentioned red pattern formation, except that the electrodeposition material (Cu) on the substrate was transferred and a blue dyeing solution having the following composition was used in place of the red dyeing solution.

(Composition of blue dyeing solution) -Kayanol-Cyanine G (manufactured by Nippon Kayaku Co., Ltd.) ... 6 g-Acetic acid ... 5 cc-Pure water ... 1000 cc Thereafter, the red pattern and green pattern formed as described above Then, a protective layer was formed so as to cover the colored layer having the blue pattern and the black matrix, and a transparent common electrode (ITO) was further formed on the protective layer. (Experimental Example 3) In the same manner as in Experimental Example 1, electrodeposited substrates for red pattern, green pattern and blue pattern were prepared.

Then, in the same manner as in Experimental Example 1, the entire back surface of each electrodeposited substrate and the portion not requiring electrodeposition on the front surface were covered with an electrically insulating tape and washed. Then, the electrodeposited substrate was used as an anode, the platinum electrode was used as a cathode, and the electrode gap was 200 mm. Deposition of deposited material (thickness = 1μ
m) Furthermore, the electrodeposited substrate pulled up from the electrolytic solution was washed, dried, and heat-treated (90 ° C., 15 minutes).
However, the same pigment as the red pigment, green pigment, and blue pigment used in Experimental Example 1 was used.

(Composition of Electrolyte Solution) Anionic polyvinyl alcohol 6 wt% Triethylamine 3 wt% Facial agent 5 wt% Pure water 86 wt% Next, the same as used in Experimental Example 1 The black matrix substrate of No. 1 was used, and an adhesive was applied on the black matrix substrate by a spin coating method (rotational speed = 3000 rpm) so as to have a thickness of 1.5 μm to form an adhesive thin film. Then, on this adhesive thin film, the red pigment-containing electrodeposition material of the above-mentioned red pattern electrodeposition substrate, the green pigment-containing electrodeposition material of the green pattern electrodeposition substrate and the blue pigment-containing electrodeposition material of the blue pattern electrodeposition substrate. The deposited materials were sequentially transferred to form a colored layer having a red pattern, a green pattern and a blue pattern.

Next, a protective layer was formed so as to cover the colored layer and the black matrix, and a transparent common electrode (ITO) was further formed on the protective layer. (Experimental Example 4) In the same manner as in Experimental Example 1, electrodeposited substrates for red pattern, green pattern and blue pattern were prepared.

Then, in the same manner as in Experimental Example 1, the entire back surface of each electrodeposited substrate and the portion not requiring electrodeposition on the front surface were covered with an electrically insulating tape and washed. Then, the electrodeposited substrate was used as an anode, the platinum electrode was used as a cathode, and the electrode gap was 200 mm, so that each electrode substrate was immersed in each electrolytic solution of the following composition and energized to deposit a substance to be dyed (thickness = 1 μm). ) Further, the electrodeposited substrate pulled up from the electrolytic solution is washed and dried, and then heat treated (9
(0 ° C., 15 minutes).

(Composition of Electrolyte Solution) Anionic polyvinyl alcohol: 8% by weight Triethylamine: 4% by weight Pure water: 88% by weight Next, a black matrix substrate similar to that used in Experimental Example 1 was used, An adhesive was applied on the black matrix substrate by a spin coating method (rotational speed = 3000 rpm) so as to have a thickness of 1.5 μm to form an adhesive thin film. Next, the dyed substance of the electrodeposited substrate for red pattern was transferred onto the adhesive thin film to form a dyed pattern.

Then, the black matrix substrate was immersed in a red dyeing solution having the same composition as the red dyeing solution used in Experimental Example 2 to dye the pattern to be dyed, and the dyeing pattern was fixed with tannic acid to form a red pattern. .

Next, the substance to be dyed on the electrodeposition substrate for green pattern was transferred onto the adhesive thin film, and a green dyeing solution having the same composition as the green dyeing solution used in Experimental Example 2 was used in place of the red dyeing solution. Otherwise, a green pattern was formed in the same manner as the above red pattern formation.

Further, the dyeing substance of the electrodeposition substrate for blue pattern was transferred onto the adhesive thin film, and instead of the red dyeing liquid, a blue dyeing liquid having the same composition as the blue dyeing liquid used in Experimental Example 2 was used. Formed a blue pattern in the same manner as the above red pattern formation.

After that, a protective layer is formed so as to cover the colored layer having the red pattern, the green pattern and the blue pattern formed as described above and the black matrix,
Further, a transparent common electrode (ITO) was formed on the protective layer.

[0070]

As described above in detail, according to the present invention, the photoprocess is required only when the electrodeposited substrate is formed. Therefore, the exposure apparatus required in the conventional manufacturing method in which the photoprocess is repeatedly performed is not required, Further, since the throughput is higher than that of the photolithography method, it is possible to reduce the manufacturing cost, and it is possible to manufacture the color filter with a large area and high accuracy.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an active matrix liquid crystal display using a color filter manufactured according to the present invention.

FIG. 2 is a schematic sectional view of the liquid crystal display shown in FIG.

FIG. 3 is an enlarged partial sectional view of a color filter used in the liquid crystal display shown in FIG.

FIG. 4 is a process drawing for explaining the production of an electrodeposition substrate used in the production of the color filter according to the present invention.

FIG. 5 is a process drawing for explaining an example of the method for manufacturing the color filter according to the present invention.

FIG. 6 is a process drawing for explaining an example of the method for manufacturing the color filter according to the present invention.

FIG. 7 is a process drawing for explaining another example of the method for manufacturing a color filter according to the present invention.

FIG. 8 is a process drawing for explaining another example of the method for manufacturing a color filter according to the present invention.

FIG. 9 is a process drawing for explaining another example of the color filter manufacturing method according to the present invention.

FIG. 10 is a process chart for explaining another example of the color filter manufacturing method according to the present invention.

[Explanation of symbols]

 2 ... Electrodeposited substrate 3 ... Substrate 4 ... Electrical insulating material 4R, 4G, 4B ... Master pattern 6 ... Electrodeposited material 6R, 6G, 6B ... Pigment-dispersed electrodeposited material 6 '... Containing dyeing base material Electrodeposited substance 7 ... Coating layer containing pigment 8 ... Coating layer having dyeability 10 ... Color filter 12 ... Black matrix substrate 13 ... Transparent substrate 14 ... Black matrix 16 ... Coloring layer 16R, 16G, 16B ... Coloring pattern

Claims (5)

[Claims] 1. A transparent substrate is provided with a black matrix on the surface of which a coloring material in which a pigment is dispersed is applied onto a black matrix substrate to form a coating layer, and at least the surface of the substrate having electrical conductivity is electrically insulating. The electrodeposited substance deposited on the conductive surface of the electrodeposition substrate on which a master pattern having a desired coloring pattern is formed by a material is transferred to the coating layer as a corrosion resistant material, and the corrosion resistant material is provided in the coating layer. A method for manufacturing a color filter, which comprises removing a portion not formed to form a desired colored pattern, and repeating this operation to form a colored layer having a predetermined number of colors. 2. A black matrix substrate having a black matrix on the surface of a transparent substrate is coated with a dyeing base material to form a coating layer, and at least the surface of the substrate having conductivity is desired to have a desired electrical insulating material. The electrodeposition material deposited on the conductive surface of the electrodeposition substrate on which the master pattern of the colored pattern is formed is transferred to the coating layer as a corrosion resistant material, and a portion of the coating layer where the corrosion resistant material is not provided is After removal, the remaining coating layer is dyed to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors, which is a method for producing a color filter. 3. An electrodeposited substance in which a pigment is dispersed is deposited on the conductive surface of an electrodeposited substrate in which a master pattern of a desired colored pattern is formed of an electrically insulating material on the surface of a substrate having at least conductive surface. Then, the deposited electrodeposition material is transferred onto a black matrix substrate having a black matrix on the surface of a transparent substrate to form a desired colored pattern, and this operation is repeated to form a colored layer having a predetermined number of colors. A method for manufacturing a color filter, comprising: 4. An electrodeposition material containing a dyeing base material on the conductive surface of an electrodeposition substrate having a master pattern of a desired coloring pattern formed of an electrically insulating material on the surface of a substrate having at least conductive surface. And deposit the electrodeposited substance on a black matrix substrate having a black matrix on the surface of a transparent substrate and dye it to form a desired coloring pattern. A method of manufacturing a color filter, which comprises forming a layer. 5. An electrodeposition material containing a dyeing base material on the conductive surface of an electrodeposition substrate having a master pattern of a desired coloring pattern formed of an electrically insulating material on the surface of a substrate having at least conductive surface. After depositing and dyeing, the transparent electrodeposited material is transferred onto a black matrix substrate having a black matrix on the surface of the transparent substrate to form a desired colored pattern, and this operation is repeated to form a predetermined number of colors. A method for producing a color filter, which comprises forming a colored layer.