JPH10104415A - Color filter, liquid crystal element using the same, production of these, and ink for ink-jet process used for production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter having sufficient heat resistance, solvent resistance and high resolution without causing mixing of colors, irregular colors or voids in colors in simplified production processes by using an ink jet method. SOLUTION: A black matrix 2 is formed on a substrate 1, and an ink 4 composed of a coloring agent and a reactive nylon resin is injected from an ink jet printer on the openings of the black matrix 2. The ink 4 on the substrate is hardened by heat treatment to form a color filter. If necessary, a protective film 5 is formed on the filter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color filter used in a color display device and the like and a method of manufacturing the same, and more particularly, to a color liquid crystal display device used in a color television, an in-vehicle television, a personal computer, a pachinko game board, and the like. The present invention relates to a suitable color filter, a liquid crystal device using the color filter, a method for producing the same, and an inkjet ink used in the method.

[0002]

2. Description of the Related Art In recent years, the development of personal computers,
In particular, with the development of portable personal computers, the demand for liquid crystal displays, especially color liquid crystal displays, tends to increase. However, for further widespread use, it is necessary to reduce the cost of the liquid crystal display. In particular, there is an increasing demand for reducing the cost of a color filter having a high specific gravity. Conventionally, various methods have been tried to satisfy the above requirements while satisfying the required characteristics of the color filter, but no method has yet been established that satisfies all the required characteristics. The respective methods will be described below.

[0003] The first method most frequently used is a dyeing method. In the dyeing method, a water-soluble polymer material, which is a material for dyeing, is applied on a glass substrate, and is patterned into a desired shape by a photolithography process. Get a pattern. By repeating this three times, R (red), G
(Green) and B (blue) coloring layers are formed.

[0004] The second method is a pigment dispersion method, which is recently replacing the dyeing method. In this method, a photosensitive resin layer in which a pigment is dispersed is formed on a substrate, and a monochromatic pattern is obtained by patterning the photosensitive resin layer. This process is further repeated three times to form R, G, B colored layers.

As a third method, there is an electrodeposition method. In this method, a transparent electrode is patterned on a substrate, and immersed in an electrodeposition coating solution containing a pigment, a resin, an electrolytic solution, and the like to electrodeposit a first color. This process is repeated three times to form R, G, and B colored layers, and finally firing.

As a fourth method, a pigment is dispersed in a thermosetting resin, and printing is repeated three times so that R, G,
After separately applying B, the resin is thermally cured to form a colored layer. In any method, a protective film is generally formed on the colored layer.

The common feature of these methods is that R,
It is necessary to repeat the same process three times in order to color the three colors G and B, which increases the cost. In addition, there is a problem that the yield decreases as the number of steps increases. Further, in the electrodeposition method, since the pattern shape that can be formed is limited, it is difficult to apply the current technology for TFT. Further, the printing method is not suitable for forming a fine pitch pattern due to poor resolution and smoothness.

[0008]

SUMMARY OF THE INVENTION In order to make up for these drawbacks, Japanese Patent Application Laid-Open Nos. 59-75205 and 63-23
Japanese Patent Application Laid-Open No. 5901 or Japanese Patent Application Laid-Open No. Hei 1-217320 describes a method for producing a color filter using an ink jet method, but a satisfactory one has not yet been obtained.

[0009] The object of the present invention is to provide a heat resistance of the conventional method,
Satisfies the required properties such as solvent resistance and resolution, prevents color mixing, color unevenness, and color loss, and provides a high-definition and highly reliable color filter. Therefore, the manufacturing process of the color filter can be shortened, and the cost of the liquid crystal element can be reduced.

[0010]

That is, according to the present invention, there is provided a thermosetting resin containing at least a coloring agent and a reactive nylon resin in the concave portion of the color filter forming surface having the concave portion in the light transmitting portion. A method for producing a color filter, comprising a step of applying an ink composed of a mold composition and a step of curing the ink by heat treatment, wherein the invention according to claim 7 is obtained by the production method. It is a color filter characterized by the following.

The invention according to claims 8 and 9 is a liquid crystal device using the color filter, and the invention according to claims 10 and 11 is directed to manufacturing a color filter by the manufacturing method. A method for manufacturing a liquid crystal element, characterized by comprising a thermosetting composition containing at least a colorant and a reactive nylon resin, which is suitable for the present invention. This is an inkjet ink.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a first embodiment of a method for manufacturing a color filter according to the present invention. Note that the following steps -a to d correspond to (a) to (d) in FIG. 1, respectively. The present embodiment is an example in which a black matrix is provided on a substrate, and a color filter is formed by applying the ink according to the present invention to a concave portion formed in an opening of the black matrix by an inkjet method.

Step-a First, a black matrix 2 is formed on a substrate 1. Thereby, a concave portion for applying ink described later is formed in the opening of the black matrix 2. In the present invention, the substrate 1
A glass substrate is generally used, but is not limited to a glass substrate as long as it has necessary characteristics such as transparency and mechanical strength as a color filter for liquid crystal. The black matrix 2 can be formed by a general photolithography method using a black pigment resist. At this time, the thickness of the black pigment resist is 0.5
It is preferably at least μm. If it is less than 0.5 μm, the optical density of the black matrix will be low, and the black matrix will not function sufficiently. Further, when an ink described later is applied, the ink may overflow from the concave portion and the adjacent inks of different colors may be mixed.

Step-b Next, R, G, and B inks 4 are ejected toward the substrate by an ink jet printer so as to fill the recesses.
A pattern of each color is formed. The R, G and B patterns may be formed in a so-called casting manner. In addition, it is preferable that each color ink is applied on the black matrix 2 within a range where the inks do not overlap.

The ink used in the present invention comprises a thermosetting composition containing at least a colorant and a reactive nylon resin.

As the above-mentioned coloring agent, both dyes and pigments are used. As the dye, C.I. I. Acid Red 118, C.I. I. Acid Red 254, C.I.
I. Acid Green 25, C.I. I. Acid Blue 113, C.I. I. Acid Blue 185, C.I. I.
Acid Blue 7 and the like include C.I. I. Pigment Red 177, C.I. I. Pigment Red 5,
C. I. Pigment Red 12, C.I. I. Pigment Green 36, C.I. I. Pigment Blue 209,
C. I. Pigment Blue 16 and the like, but are not limited thereto. These dyes and pigments are preferably used at a ratio of about 0.1 to 20% by weight in the ink.

The reactive nylon resin used in the ink according to the present invention is a nylon resin having a self-crosslinking property or a reactivity with a crosslinking agent, for example, 8 nylon having an amide bond hydrogen substituted with a methoxymethyl group. There are also alcohol-soluble nylons, which are made water-soluble by introducing substituents, and denatured polyamide-type nylons having a function of dissolving in water or alcohol. Specific products include Toresin series manufactured by Teikoku Chemical Industry Co., Ltd. and AQ-nylon series manufactured by Toray Industries, Inc. These reactive nylon resins are preferably used in an amount of 0.05 to 20% by weight in the ink, and are used alone or in combination of two or more.

The above-mentioned reactive nylon resin undergoes a self-crosslinking reaction by heat treatment to improve water resistance and solvent resistance. Therefore, after heat curing, the water resistance and solvent resistance are high, and the color filter can withstand post-processes. Is obtained. In this case, the crosslinking reaction is promoted by mixing an acid such as oxalic acid, malonic acid, citric acid, maleic acid, itaconic acid, tartaric acid, succinic acid, hypophosphorous acid, adipic acid and sebacic acid. Further, it can be used in combination with a cross-linking agent. Examples of the cross-linking agent include an epoxy compound and a methylolated melamine, but are not limited thereto. When these acids and cross-linking agents are used in combination, the content in these inks is preferably in the range of 0.01 to 10% by weight. These acids and crosslinking agents may be used alone or
You may use in combination of more than one.

Further, acrylic resins such as polyvinyl alcohol, polyacrylic acid, polymethacrylic acid, polyacrylate, polymethacrylate, and polyhydroxyethyl methacrylate; silicone resins; epoxy resins; hydroxypropyl cellulose, hydroxyethyl cellulose; Cellulose derivatives such as methylcellulose and carboxymethylcellulose or modified products thereof; and high molecular compounds such as polyvinylpyrrolidone may be mixed.

A suitable aqueous medium when the ink used in the present invention is used in an ink jet system is a mixed solvent of water and a water-soluble organic solvent, and the water is not general water containing various ions. It is preferable to use ion-exchanged water (deionized water).

Other water-soluble organic solvents which can be used in combination with water include, for example, methyl alcohol, ethyl alcohol and n.
-Propyl alcohol, isopropyl alcohol, n-
Butyl alcohol, sec-butyl alcohol, ter
alkyl alcohols having 1 to 4 carbon atoms such as t-butyl alcohol; amides such as dimethylformamide and dimethylacetamide; ketones or keto alcohols such as acetone and diacetone alcohol; ethers such as tetrahydrofuran and dioxane; Polyalkylene glycols such as polypropylene glycol; ethylene glycol, propylene glycol, butylene glycol, triethylene glycol, 1,2,6
Alkylene glycols having an alkylene group containing 2 to 6 carbon atoms such as hexanetriol, thiodiglycol, hexylene glycol, diethylene glycol; glycerin; ethylene glycol monomethyl (or ethyl) ether, diethylene glycol methyl (or ethyl) ether; Lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl (or ethyl) ether; N-methyl-2-pyrrolidone, 2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone and the like. Among these many water-soluble organic solvents, polyhydric alcohols such as diethylene glycol and lower alkyl ethers of polyhydric alcohols such as triethylene glycol monomethyl (or ethyl) ether are preferable.

Further, in order to obtain the stability of ink ejection from the ink jet printer, it is effective to add a lower alkyl ether of ethanol, isopropyl alcohol, or a polyhydric alcohol. This is presumably because the addition of these solvents makes it possible to more stably foam the ink on the thin film resistor in the ink jet printer in the case of the bubble jet type.

Further, in addition to the above-mentioned components, a surfactant, an antifoaming agent, a preservative and the like may be added to the ink according to the present invention in order to obtain an ink having desired physical properties as required. And a commercially available water-soluble dye or the like can be added.

For example, any surfactant may be used as long as it does not adversely affect the storage stability or the like of the ink. Examples thereof include fatty acid salts, higher alcohol sulfates, and liquid fatty oil sulfates. Nonionic surfactants such as anionic surfactants such as ester salts and alkyl allyl sulfonates, polyoxyethylene alkyl ethers, polyoxyethylene alkyl esters, polyoxyethylene sorbitan alkyl esters, acetylene alcohol and acetylene glycol And one or more of these can be appropriately selected and used.

In the present invention, when the pH of the ink needs to be adjusted in order to maintain the stability of the ink, for example, ammonia or various organic amines such as diethanolamine and triethanolamine, sodium hydroxide, An inorganic alkali agent such as a hydroxide of an alkali metal such as lithium hydroxide or potassium hydroxide, an organic acid, or an inorganic acid can be used.

As the ink jet system used in the present invention, a bubble jet type using an electrothermal converter or a piezo jet type using a piezoelectric element can be used as an energy generating element. The pattern can be set arbitrarily.

Step-c The ejected ink 4 is cured by heat treatment to form a color filter 9. In the present invention, it is desirable to perform heat treatment at a temperature of 130 ° C. or more in order to sufficiently develop heat resistance and solvent resistance and to form a heat treatment in a post-process or a color filter that can withstand the solvent.

Step-d A resin composition is applied to the entire surface of the substrate and cured by light irradiation and / or heat treatment to form a protective film 5. As the resin composition, any resin can be used as long as it has transparency and can withstand the subsequent process of forming ITO or the like, the process of forming an alignment film, or the like. Usually, the protective film 5 is provided on the color filter, but may be omitted if not particularly required.

Next, FIG. 2 shows a second embodiment of the method for manufacturing a color filter of the present invention. The following step-a
To e correspond to (a) to (e) of FIG. The present embodiment is an example in which ink is applied after forming an ink receiving layer on a color filter forming surface.

Step-a As in the first embodiment, a glass substrate 1 on which a black matrix 2 is formed is prepared.

Step-b The entire surface of the substrate is coated with a resin composition to provide an ink receiving layer 3. This ink receiving layer 3 receives ink,
It has a function of adjusting the spread of the landed ink to a desired diameter, and is selected from a resin composition having process resistance such as heat resistance.

Specifically, those having low so-called water repellency and oil repellency are not so high. For example, acrylic, epoxy and imide resins are preferably used. Further, these resin compositions may be of a heat / light curable type, and in such a case, they may be cured after ink ejection.

The resin composition is applied by a method such as spin coating, roll coating, bar coating, spray coating, dip coating and the like.

Step-c Ink 4 is discharged onto the ink receiving layer 3 by an ink jet printer.

Step-d Heat treatment or heat treatment and light irradiation cure the ink and simultaneously cure the ink receiving layer 3 to form the color filter 9.

Step-e As in the first embodiment, a resin composition is applied to the entire surface of the substrate and cured by light irradiation and / or heat treatment to form a protective film 5
To form

FIG. 3 is a schematic sectional view of an embodiment of a display portion of the liquid crystal device of the present invention, in which the color filter according to the first embodiment is incorporated. This embodiment uses a TFT
It is a color liquid crystal element.

In the TFT color liquid crystal element, a substrate having a color filter 9 and a substrate having a TFT are bonded together with a sealing material (not shown), and a gap (about 2 to 5 μm) therebetween.
Is formed by enclosing a liquid crystal compound 15 therein. A TFT (not shown) and a transparent pixel electrode 12 are formed in a matrix inside one substrate of the liquid crystal element. A color filter 9 is provided at a position corresponding to the pixel electrode 12 inside the other substrate, and a transparent opposing (common) electrode 14 is formed on one surface of the color filter 9.
Further, alignment films 13a and 13b are formed in the planes of both substrates, respectively, and by subjecting them to rubbing treatment, liquid crystal molecules can be arranged in a certain direction. Polarizing plates 16a, 16b are provided outside the respective glass substrates.
Is glued. As the backlight, a combination of a fluorescent lamp and scattered light (both not shown) is used, and display is performed by making the liquid crystal compound function as an optical shutter that changes the transmittance of light 17 of the backlight.

In the liquid crystal device of the present invention, any liquid crystal such as a TN type liquid crystal and a ferroelectric liquid crystal (FLC) can be suitably used.

FIG. 3 shows a liquid crystal device in which a color filter is provided on the substrate side facing the TFT substrate.
The black matrix 2 and the color filter 9 are TFT
It may be formed on the substrate side. FIG. 4 is a schematic sectional view of a display portion of the liquid crystal element, and FIG. 5 is a plan view of a TFT substrate (pixel electrodes are not shown for simplicity). FIG. 4 corresponds to a section taken along line AA ′ of FIG. As shown in FIG.
A gate electrode 102, a gate insulating film 103, an i-type amorphous silicon film 104,
A TFT 109 composed of an ohmic contact layer 106, a source electrode 107, and a drain electrode 108 is formed. A transparent pixel electrode 114 is connected to the drain electrode 108 via a passivation film 110 and a light shielding layer 111. Transparent pixel electrode 114 and glass substrate 101
A color filter 113 is formed between the two. An alignment film 115 is formed on the entire surface of the TFT 109 and the transparent pixel electrode 114.

On the other hand, on the second glass substrate 116, a common transparent electrode 117 and an alignment film 118 are formed, and are arranged opposite to the first glass substrate 101 with a gap of about 5 μm. Are filled with liquid crystal 119. 6 and 7 are cross-sectional views illustrating the steps of manufacturing the liquid crystal element of the present embodiment. The steps will be described below. Note that the following steps -a to k correspond to (a) to (k) in FIGS.

Step-a Cr, T
The gate electrode 102 is formed by a or the like.

Step-b A gate insulating film 103 is formed on the gate electrode 102 to a thickness of about 5000 °. SiN, Si for the gate insulating film
A single-layer film of ₃ N ₄ , TaO, Ta ₂ O ₅ , or the like, or a multilayer film formed by laminating these insulating films is used.

Step-c On the gate insulating film 103, an i-type amorphous silicon film 104 and an etching stop layer 105 are formed to a thickness of about 2000 °. The etching stop layer 105 protects the i-type amorphous silicon film 104 so as not to damage the i-type amorphous silicon film 104 serving as a channel region at the time of etching in the later-described step-f. It is formed using a material having an etching rate different from that of the film 104 and the ohmic contact layer 106, for example, an insulating film such as SiN or Si ₃ N ₄ .

Step-d The etching stop layer 105 is patterned.

Step-e: An ohmic contact layer 106 having a thickness of about 3000 ° is formed on the i-type amorphous silicon film 104 and the etching stop layer 105. For the ohmic contact layer 106, n ⁺ type amorphous silicon or microcrystal silicon is used.

Step-f A source electrode 107 and a drain electrode 108 are formed on the ohmic contact layer 106, and unnecessary portions of the ohmic contact layer 106, the i-type amorphous silicon film 104, and the gate insulating film 103 are removed by etching. T
The FT 109 is formed. For the source electrode 107 and the drain electrode 108, Al, Mo, or the like is used.

Step-g Passivation film 1 of TFT 109 made of SiN or the like
Then, a light-shielding layer 111 made of resin is formed thereon. In the present embodiment, the light shielding layer 111 corresponds to the black matrix described in the first embodiment at the same time as the light shielding for preventing the malfunction of the TFT. The same material is used.

Step-h Passivation film 110 and light shielding layer 1 in opening region 120
11 is developed and removed, and a contact hole 112 is formed on the drain electrode 108.

Step-i The color filter 113 is formed in the opening area 120.
Each of the color filters 113 discharges the ink according to the present invention to a predetermined position by an inkjet printer,
It is formed by curing by heat treatment.

Step-j A transparent pixel electrode 114 made of ITO is formed on the color filter 113, and a drain electrode 108 is connected through a contact hole 112. Further, an alignment film 115 made of polyimide is formed on the entire surface of the TFT 109 and the transparent pixel electrode 114.

Step-k On the other hand, the glass substrate 116 on which the common transparent electrode 117 and the alignment film 118 are formed, the TFT 109 and the color filter 1
The glass substrate 101 on which 13 and the like are formed is disposed so as to face each other,
A liquid crystal 119 is filled between the two substrates.

The ink used in the present invention can be used as an inkjet ink in addition to producing a color filter.
Even when used for printing on paper, film, and the like, it shows excellent performance in terms of image clarity and water resistance.

Further, in the above-described embodiment, a production example in which the production process is simplified by using an ink jet system suitable for the present invention has been described. However, ink can be applied by other means.

[0056]

The present invention will be described below in detail with reference to examples.

[Example 1] A black pigment resist BK-739P manufactured by Nippon Steel Chemical Co., Ltd. was applied on a glass substrate to a film thickness of 1.
Coating was performed by spin coating to a thickness of 2 μm, and a 1.2 μm thick black matrix was formed by exposure, development, and heat treatment. Next, R, G, and B inks were ejected to the openings by an inkjet printer.

The following inks were used.

(R ink) C.I. I. Acid Red 118 5 parts by weight Water-soluble nylon [Trange FS-500, manufactured by Teikoku Chemical Industry Co., Ltd.] 6 parts by weight Methylolated melamine [Sumitomo Chemical Co., Ltd., Sumirez Resin 613 special] 4 parts by weight Ethylene glycol 20 parts by weight Ethanol 2 parts by weight Ion exchange water 63 parts by weight

(G ink) C.I. I. Acid Green 25 5 parts by weight Same as R ink

(B ink) C.I. I. Acid Blue 113 5 parts by weight Same as R ink

After the ink has been discharged, the ink
The ink was cured by heat treatment for one minute to form a color filter for a liquid crystal element.

When the above color filter was observed with an optical microscope, no problems such as color mixing and color unevenness were observed.

The above color filters, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of the present embodiment,
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

Example 2 A color filter was prepared in exactly the same manner as in Example 1, and a two-component thermosetting resin material [Optomer SS650, manufactured by Nippon Synthetic Rubber Co., Ltd.]
0] was spin-coated so as to have a thickness of 1 μm.
A protective film was prepared by performing a heat treatment at 30 ° C. for 30 minutes to cure the resin layer.

Observation of the thus prepared color filter by an optical microscope revealed no problems such as color mixing, color unevenness, peeling of the protective film and cracks.

The above color filter, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of this embodiment, the temperature was -20 ° C.
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

Example 3 A color filter was produced in the same manner as in Example 1 except that the following inks were used.

(R ink) C.I. I. Acid Red 118 5 parts by weight Water-soluble nylon [Trange FS-350 manufactured by Teikoku Chemical Industry Co., Ltd.] 7 parts by weight N-methyl-2-pyrrolidone 15 parts by weight Ethylene glycol 20 parts by weight Isopropyl alcohol 2 parts by weight Ion-exchanged water 51 Parts by weight

(G ink) C.I. I. Acid Green 25 5 parts by weight Same as R ink

(B ink) C.I. I. Acid Blue 113 5 parts by weight Same as R ink

When the color filter thus produced was observed with an optical microscope, no problems such as color mixing and color unevenness were observed.

The above color filters, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of the present embodiment,
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

Example 4 A color filter was produced in the same manner as in Example 1 except that the following inks were used.

(R ink) C.I. I. Acid Red 254 5 parts by weight Water-soluble nylon [Trange FS-550, manufactured by Teikoku Chemical Industry Co., Ltd.] 5 parts by weight Adipic acid 0.5 parts by weight Ethylene glycol 20 parts by weight Isopropyl alcohol 2 parts by weight Acetylene glycol 1 part by weight Ion exchange 66.5 parts by weight of water

(G ink) C.I. I. Acid Green 25 5 parts by weight Same as R ink

(B ink) C.I. I. Acid Blue 185 5 parts by weight Same as R ink

When the color filter thus manufactured was observed with an optical microscope, no problems such as color mixing and color unevenness were observed.

The above color filter, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of the present embodiment,
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

Example 5 The procedure of Example 1 was repeated except that the black pigment resist was BK-416S manufactured by Tokyo Ohka Co., Ltd., the film thickness was 1.5 μm, and the inks were as follows. A filter was made.

(R ink) C.I. I. Pigment Red 177 4 parts by weight Water-soluble nylon [Trange FS-350, manufactured by Teikoku Chemical Industry Co., Ltd.] 4 parts by weight Succinic acid 0.5 parts by weight N-methyl-2-pyrrolidone 15 parts by weight Ethylene glycol 20 parts by weight isopropyl alcohol 1 part by weight Ion exchange water 55.5 parts by weight

(G ink) C.I. I. Pigment Green 365 5 parts by weight Same as R ink

(B ink) C.I. I. Pigment Blue 209 5 parts by weight Same as R ink

When the thus prepared color filter was observed with an optical microscope, no problems such as color mixing and color unevenness were observed.

The above color filter, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of the present embodiment,
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

Example 6 A black matrix was formed on a glass substrate in the same manner as in Example 1. A quaternary copolymer of acrylic acid-methyl methacrylate-hydroxyethyl methacrylate-N-methylol acrylamide was formed thereon to a thickness of 1 μm as an ink receiving layer. Next, the same R, G, and B inks as in Example 1 were discharged into the openings of the black matrix by an ink jet printer, and the ink and the ink receiving layer were cured by heat treatment at 220 ° C. for 30 minutes.

When the color filter thus manufactured was observed with an optical microscope, no problems such as color mixing and color unevenness were observed.

The above color filters, ITO
A series of operations including (electrode) formation, formation of an alignment film, sealing of a liquid crystal material, and the like were performed, and a color liquid crystal device as shown in FIG. 3 was manufactured.

Using the liquid crystal element of this embodiment, the temperature was -20.degree.
When driving was performed for 1000 hours in a temperature range of 60 ° C., no trouble occurred.

[Embodiment 7] An embodiment of the on-array type will be described with reference to FIGS.

First, a gate electrode 102 was formed on a glass substrate 101 with a thickness of about 2000 ° by using Cr. Next, 5000 g of Si ₃ N ₄ is formed on the gate electrode 102.
The gate insulating film 103 was formed to a thickness of about Å. Further, i.
An etching stop layer 105 was formed of a type amorphous silicon film 104 and SiN, and the etching stop layer 105 was patterned.

Next, the i-type amorphous silicon film 10
An ohmic contact layer 106 was formed of n.sup. ⁺ Type amorphous silicon with a thickness of about 3000.degree.

Next, a source electrode 107 and a drain electrode 108 are formed of Al on the ohmic contact layer 106, and unnecessary portions of the ohmic contact layer 106, the i-type amorphous silicon film 104, and the gate insulating film 103 are removed by etching. Thus, a TFT 109 was formed.

The TFT 109 was covered with a passivation film 110 made of SiN, a light-shielding layer 111 made of carbon black was formed thereon, and the mask was exposed. Passivation film 110 and light shielding layer 11 in opening region 120
1 was developed and removed, and a contact hole 112 was formed on the drain electrode 108.

Using the same R, G, and B inks as those used in the first embodiment, the opening region 120 is colored by discharging the ink to a predetermined position by an ink-jet method. The ink was cured by heat treatment.

A transparent pixel electrode 114 made of ITO is formed on the color filter 113 and a contact hole 112 is formed.
, The drain electrode 108 was connected. Furthermore, TF
An alignment film 115 made of polyimide was formed on the entire surface of T109 and the transparent pixel electrode 114.

On the other hand, the common transparent electrode 117 and the alignment film 118
And the glass substrate 101 on which the TFT 109, the color filter 113, and the like are formed, and the liquid crystal 119 is filled between the two substrates.

In the liquid crystal device thus prepared, no obstacle such as color mixture and color unevenness was observed, and a series of operations could be performed without any problem. Further, using the liquid crystal element of this embodiment,
When driving was performed for 1000 hours continuously in a temperature range of 20 ° C. to 60 ° C., no trouble occurred.

[Embodiment 8] Ink-jet recording having an on-demand type multi-recording head that uses the same ink as in Embodiment 1 except that the colorant is changed and applies thermal energy according to a recording signal to eject the ink. Using a device, solid portions of yellow, magenta, cyan, and black were recorded adjacent to each other on Canon NP-DRY copy paper, and the printed matter was heated and fixed. The following were used as coloring agents.

(Black) C.I. I. Food black 2 (yellow) C.I. I. Direct Yellow 86 (Magenta) C.I. I. Acid Red 35 (cyan) C.I. I. Direct Blue 199

Observation of whether or not the colors were blurred or unevenly mixed at the boundary between the respective colors of the color inks and the boundary between the color black inks showed that there were no portions where the colors were blurred or unevenly mixed. Was.

The printed matter was immersed in tap water for 5 minutes.
When the print density before and after the test was measured, no change in the print density was observed.

Comparative Example 1 A black pigment resist CK-S171B manufactured by Fuji Hunt Co., Ltd. was applied on a glass substrate by spin coating so as to have a thickness of 1.0 μm.
A black matrix having a thickness of 1.0 μm was formed by exposure, development, and heat treatment. Next, R, G, and B inks were ejected to the openings of the black matrix by an inkjet printer. The following were used as the ink.

(R ink) C.I. I. Acid Red 118 5 parts by weight Acrylic acid-methyl methacrylate-hydroxyethyl methacrylate terpolymer 4.5 parts by weight N-methyl-2-pyrrolidone 15 parts by weight Ethylene glycol 20 parts by weight Ethanol 2 parts by weight Ion exchange water 53 .5 parts by weight

(G ink) C.I. I. Acid Green 25 5 parts by weight Same as R ink

(B ink) C.I. I. Acid Blue 113 5 parts by weight Same as R ink

After discharging the above ink, the ink was heated at 230 ° C. and 40 ° C.
The ink was cured by heat treatment for one minute to form a color filter.

When the thus prepared color filter was observed with an optical microscope, color mixing and color unevenness were observed.

Further, the above color filters, ITO
A series of operations such as (electrode) formation, alignment film formation, liquid crystal material encapsulation, etc. were performed to produce a color liquid crystal device as shown in FIG. 3. Further, a problem such as cracking of the color filter has occurred.

Comparative Example 2 A color filter was produced in the same manner as in Comparative Example 1 except that the following inks were used.

(R ink) C.I. I. Acid Red 118 5 parts by weight Hydroxypropylcellulose 4.5 parts by weight N-methyl-2-pyrrolidone 15 parts by weight Ethylene glycol 20 parts by weight Ethanol 2 parts by weight Deionized water 53.5 parts by weight

(G ink) C.I. I. Acid Green 25 5 parts by weight Same as R ink

(B ink) C.I. I. Acid Blue 113 5 parts by weight Same as R ink

When the thus prepared color filter was observed with an optical microscope, color mixing and color unevenness were observed.

The above color filters, ITO
A series of operations such as (electrode) formation, alignment film formation, liquid crystal material encapsulation, etc. were performed to produce a color liquid crystal device as shown in FIG. 3. Further, a problem such as cracking of the color filter has occurred.

[0121]

As described above, according to the present invention,
Having sufficient heat resistance, solvent resistance, resolution, and color mixing,
A color filter without color unevenness, color omission, discoloration during the manufacturing process, and cracks can be obtained by a simple method. Therefore, even when a liquid crystal element having the color filter as a component is manufactured, an inexpensive and highly reliable liquid crystal element can be provided without deterioration due to heat treatment or a solvent in a later step.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a first embodiment of a method for manufacturing a color filter of the present invention.

FIG. 2 is a schematic sectional view showing a second embodiment of the method for manufacturing a color filter of the present invention.

FIG. 3 is a schematic cross-sectional view of a TFT color liquid crystal device provided with a color filter obtained by the first embodiment of the present invention shown in FIG.

FIG. 4 is a schematic cross-sectional view showing one embodiment of a TFT color liquid crystal element in which a color filter of the present invention is provided on a TFT substrate.

5 is a schematic plan view of a TFT substrate of the liquid crystal element shown in FIG.

FIG. 6 is a cross-sectional view showing a step of manufacturing the liquid crystal element shown in FIGS.

FIG. 7 is a cross-sectional view showing a step of manufacturing the liquid crystal element shown in FIGS. 4 and 5.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Black matrix 3 Ion receiving layer 4 Ink 5 Protective film 9 Color filter 11 Glass substrate 12 Pixel electrode 13a, 13b Alignment film 14 Common electrode 15 Liquid crystal compound 16a, 16b Polarizing plate 17 Backlight 101 Glass substrate 102 Gate electrode 103 gate insulating film 104 i-type amorphous silicon film 105 etching stop layer 106 ohmic contact layer 107 source electrode 108 drain electrode 109 TFT 110 passivation film 111 light shielding layer 112 contact hole 113 color filter 114 transparent pixel electrode 115 alignment film 116 glass substrate 117 transparent Common electrode 118 Alignment film 119 Liquid crystal 120 Open area

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masafumi Hirose 3-30-2 Shimomaruko, Ota-ku, Tokyo Inside Canon Inc.

Claims (12)

[Claims] 1. A step of applying an ink comprising a thermosetting composition containing at least a colorant and a reactive nylon resin to the concave portion of a color filter forming surface having a concave portion in a light transmitting portion, and heat treating the ink. And a step of curing the color filter. 2. The method according to claim 1, wherein the recess is an opening of a black matrix formed on the substrate. 3. The method for producing a color filter according to claim 2, wherein said black matrix is made of a resist containing a black pigment. 4. The method for producing a color filter according to claim 1, wherein an ink is applied after forming an ink receiving layer made of a resin composition on the color filter forming surface. 5. The method for producing a color filter according to claim 4, wherein said ink receiving layer is made of a resin composition curable by at least one of light irradiation and heat treatment. 6. The method for producing a color filter according to claim 1, wherein the application of the ink is performed by an ink-jet method. 7. A color filter produced by the production method according to claim 1. Description: 8. A liquid crystal device comprising a pair of substrates each having an electrode and holding a liquid crystal between the pair of substrates, wherein one of the pair of substrates is provided with the color filter according to claim 7. 9. The TFT substrate according to claim 8, wherein the color filter is formed on the TFT substrate.
The liquid crystal element according to the above. 10. A method for manufacturing a liquid crystal device comprising a pair of substrates each having an electrode and a liquid crystal sandwiched between the pair of substrates, and having a color filter on one of the pair of substrates. 7. A method for manufacturing a liquid crystal element, which is manufactured by the manufacturing method according to any one of 1 to 6. 11. A method for manufacturing a liquid crystal device comprising a liquid crystal sandwiched between a TFT substrate having a color filter and a counter electrode substrate, wherein the pixel portion of the substrate on which the TFT array is formed is formed as a concave portion. 7. A method for manufacturing a liquid crystal device, wherein a color filter is manufactured by the method according to any one of 6. 12. An ink-jet ink characterized by being a thermosetting composition containing at least a colorant and a reactive nylon resin.