JPH09203803A - Method for manufacturing color filter and liquid crystal display device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To substantially prevent the adhesion of ink on projecting parts and to substantially prevent the occurrence of the loss of colors within pixels as the spreading of the ink in recessed parts is excellent by using a substrate subjected to the surface treatment at the recessed parts by a lipo-ink treating agent. SOLUTION: The projecting parts 2 imparted with an adequate ink repulsive property, more preferably the projecting parts 2 by a black mask are previously formed atop 4 the substrate 1 to impart the affinity to the recessed parts 3 segmented by the projecting parts 2. The colored ink is sprayed by an ink jet system to form colored layers 6, by which the color filters are formed. If the entire protective film of the projecting parts 2 has the strong ink repulsion property and the recessed parts 3 do not have the strong lipo-ink property, the sprayed ink is repulsed by the projecting parts 2 and the central parts of the recessed parts 3 are made thick but the ink does not sufficiently adhere to the peripheral parts and these parts are formed thinner. While the lipo-ink treating agent varies with the properties of the ink to be used, a hydrophilic silicone compd. and fluorinecontained compd. are preferable when the aq. ink is used.

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 by coloring a pixel portion, which is a concave portion surrounded by a convex portion provided on a substrate, by an inkjet method, and a liquid crystal display device using the same. .

[0002]

2. Description of the Related Art Various methods have been proposed as a method for forming a color filter for a liquid crystal display element. In particular, several methods are known for producing a color filter by forming a colored layer on the inner wall side of a cell of a substrate.

For example, there is a method of forming a colored layer by pattern-printing a coloring ink by an offset printing method or the like, but there is a limit to the fineness of the printing pattern, and there is a problem such as a reduction in production yield.

Further, in a method of forming a color filter pattern by applying a colored UV-curable ink on the entire surface of a substrate, irradiating it with ultraviolet rays using a mask having a predetermined pattern, and washing and dissolving unnecessary portions, In order to create color filters of the three primary colors of red, green and blue, coating,
It is necessary to perform the ultraviolet irradiation and the developing process three times, which is extremely complicated in the manufacturing process.

In addition, in the method of manufacturing a color filter using the electrodeposition coating method, a patterned transparent electrode is formed in advance in the portion to be electrodeposition coated, and the color filters of three colors are manufactured in order. Electric current is applied to the corresponding electrodes to form a color filter film on the transparent electrodes.
This method requires three electrodeposition operations, an operation to prevent color mixing due to overlapping colors, and a transparent electrode corresponding to the three colors. May be subject to restrictions.

As a rational method of manufacturing a color filter which solves these problems, it has been proposed to form a colored layer by spraying a colored ink by an ink jet method (Japanese Patent Laid-Open No. 59-75205). In this method, when an ink having good wettability with respect to a glass substrate is used, a method of previously printing a convex portion serving as a boundary with a substance having poor wettability with respect to the ink, or an ink having poor wettability with respect to glass In the case of using, a method has been proposed in which a pattern is formed in advance on the glass with a material having good wettability with the ink and the ink is fixed.

[0007]

However, if the substrate is not sufficiently lyophilic even if only the convex portion of this boundary is made ink repellent, the ink does not spread in the concave portion and the color loss occurs in the pixel corner portion. It caused the problem of being easy. This causes a problem that when this color filter is used in a liquid crystal display device or the like, color unevenness occurs or contrast is reduced due to leakage of light of another color due to insufficient coloring.

[0008] In particular, considering the mass production process, various problems which are not caused by hand-made in a laboratory are likely to occur. In the mass production process, since the process is continuous, various contaminations are likely to occur in the previous process, and since the type of substrate and the type of product are changed, even if they are changed, stable production can be performed with good yield. It is desired to be able to do it.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a convex portion having an ink repellent property is formed on the upper surface of a substrate, and is divided by the convex portion. In a method for producing a color filter in which ink is sprayed onto the recesses by an ink jet method to deposit the ink in the recesses to form a colored layer, a substrate whose surface is treated with an ink-philic treating agent is used for the color filter. A manufacturing method is provided.

In addition, a convex portion having an ink repellent property is formed on the upper surface of the substrate, and a water-based ink is sprayed on the concave portion divided by the convex portion by an inkjet method to deposit the ink in the concave portion to form a colored layer. A method for producing a color filter, which is characterized in that the recess has an ink affinity of 20 ° or less at a contact angle with water.

Further, a method for manufacturing a color filter, characterized in that the convex portions thereof are also used as a black mask, and an ink-philic ink for imparting an ink-philic property to the surface of the concave portions by using these water-based inks. The treatment agent is a water-soluble leveling agent or a water-soluble surfactant, and a method for producing a color filter, and after forming convex portions on those substrates, the upper surface thereof is treated with an ink repellent treatment agent. Provided are a method for producing a color filter which is treated to impart ink repellency, and a liquid crystal display element using the color filter formed by the method.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The method of manufacturing a color filter according to the present invention is such that a convex portion having an appropriate ink repellency provided on the upper surface of the substrate, preferably a convex portion formed by a black mask, is formed in advance and separated by the convex portion. The formed concave portion is made ink-philic, and a colored ink is sprayed by an inkjet method to form a colored layer, thereby forming a color filter.

FIG. 1 is a sectional view schematically showing a color filter of the present invention. In FIG. 1, 1 is a substrate, 2 is a convex portion, 3 is a concave portion divided by the convex portion and the convex portion, 4 is an upper surface of the convex portion, 5 is a side surface of the convex portion, and 6 is formed by spraying and depositing on the concave portion. 2 shows a colored layer obtained. Only the rightmost concave portion 3 is shown in a state in which the colored layer is not formed, for the sake of easy understanding of the description.

Although only four convex portions and three concave portions are shown in this drawing for the sake of clarity, the necessary numbers are provided. For example, in the case of a striped color filter and 640 pixels are required, RG per pixel
Since three color filters of B are required, the protrusion is 192.
One and 1920 recesses are required. In a liquid crystal display device, a color filter pattern may be formed up to the periphery of a display pixel where no display is performed due to the precision of the gap between the substrates.

In the case of the striped pattern, the convex portion may not be formed in the longitudinal direction, but the periphery of the pixel may be completely surrounded by the convex portion. In particular, in the case of a mosaic color filter, the periphery of a pixel is surrounded by a convex portion.

As the substrate used in the present invention, a glass substrate is generally used from the viewpoint of heat resistance, but a plastic substrate can also be used. Although a transparent substrate is usually used as the substrate, the present invention can be applied to a reflective substrate or a substrate colored white. As the substrate, a substrate which has been subjected to surface treatment for preventing alkali elution, imparting gas barrier properties, or for other purposes may be used as necessary.

In the present invention, the convex portions for partitioning the colored layer are formed on the substrate in a linear shape or a grid shape. The shape of this convex part is
Thus, the depressed concave portions may correspond to the pixels. For example, when a stripe-shaped color filter is formed, it is formed in a linear shape, and in order to correspond to a square pixel, it is formed in a lattice shape. Since this is appropriately determined by the shape of the pixel, various shapes such as a radial shape and a circumferential shape are also conceivable.

It is advantageous that the convex portion also serves as a black mask in a liquid crystal display device or the like. For this reason, in the following description, a description will be given based on an example in which the convex portion is also used as a black mask.
Then, a black material or a metal light-shielding layer may not be used.

As a method of forming the convex portion by the black mask, for example, a metallic chromium film, a laminated layer of metallic chromium and chromium oxide, or a black layer composed of a black pigment such as carbon black and a resin is formed, and these are formed thereon. There is a method of applying a photoresist, removing the resist in the pixel portion by a photolithography method, and removing a layer of metal chromium or the like by etching. Further, as a more cost-effective method, there is a method in which a black film made of a material containing a black pigment such as carbon black and a photocurable resin is formed, and the black film is patterned into a desired pattern by a photolithography method.

In the present invention, various known black mask forming methods can be used as long as the convex portions having a certain height can be formed in a desired pattern. The projection may be formed by laminating a thin black mask and a thick resin layer. For example,
If the thickness of the above-mentioned metal chromium film is not sufficient, first pattern such a black mask, apply a resin that is easily dissolved by an etching agent by light irradiation on it, and apply light from the black mask side. It is also possible to irradiate with and pattern the resin.

The convex portion in the present invention plays a role of preventing the sprayed ink from flowing or bleeding into other pixels when colored by the ink jet method. Therefore, it is preferable that the height of the convex portion is high to some extent, but it is also required that the overall flatness of the color filter is high, so that a height close to the thickness of the coloring layer is selected.

Specifically, it is usually about 0.1 to 2 μm, though it depends on the amount of the ink to be sprayed to obtain the desired coloring. In addition, this width is usually set to be slightly wider than the width between pixels so that a positional shift or the like will not occur in a later process and the display will not be affected.

In the present invention, if ink remains on the upper surface of the convex portion, flatness and coloring uniformity between pixels are impaired. Therefore, the upper surface of the convex portion is made ink repellent and the concave portion spreads the ink well. In order to do so, it is made ink-philic. That is, the upper surface of the convex portion repels ink, and the side surface of the convex portion and the concave portion enhance the ink affinity.

As for the degree of ink repellency of the convex portion, when the water-based ink is used, the water repellency of the upper surface of the convex portion is preferably such that the contact angle measured with water is 90 to 120 °. If it is less than 90 °, the ink is likely to remain on the upper surface of the convex portion, and if it exceeds 120 °, the coloring of the pixel is likely to be disturbed.
It is particularly preferable that the angle is about 100 to 115 °.

It is preferable that the side surface of the convex portion has lower ink repellency than the upper surface. This is disclosed in Japanese Patent Laid-Open No. 06-3476.
This is because if the side surface of the convex portion has ink repellency as in No. 37 or Japanese Patent Laid-Open No. 07-84122, the problem that the ejected ink is repelled on the side surface of the convex portion is likely to occur.

In order to adjust the ink repellency of the upper surface and the side surface of the convex portion, in consideration of the ink repellency of the material forming the convex portion, a treatment agent for adjusting the ink repellency of the upper surface or the side surface of the convex portion is used. do it. Specifically, a material having low ink repellency is used as the material for forming the convex portion, and only the upper surface thereof is treated with an ink repellent treatment agent, or conversely, a material having high ink repellency is used as the material for forming the convex portion. There is a method in which only the side surface is treated with an ink-philic treating agent. Other methods can be used as long as they do not impair the effects of the present invention and can adjust the ink repellency of the upper surface and the side surface of the convex portion.

As a method for adjusting the ink repellency,
It may be formed in advance by laminating two kinds of materials so that the convex portion itself has such ink repellency.
A portion other than the convex portion may be covered with a resist so that only the upper surface of the convex portion is subjected to the ink repellent treatment, or the entire upper surface may be subjected to the ink repellent treatment in advance and then the convex portion is patterned.

There is a method in which the convex portion is formed by coating the entire surface with a material containing a photocurable resin and patterning it by a photolithography process. In this case, the coating liquid is applied to the substrate by a method such as spin coating, roll coating, spray coating, or die coating. Then, the upper surface of this film is treated with an ink repellent treatment agent, and then a pattern is formed by a photolithography process, whereby the ink repellent property can be easily imparted only to the upper surface of the convex portion.

When the convex portion is also used as the black mask, a step of forming a black layer containing a photocurable resin and a black pigment on the substrate, and the upper surface of the black layer is surface-treated with an ink repellent treatment agent. And a step of forming a desired black mask pattern by a photolithography process.

The ink repellent treatment agent that imparts the ink repellency to the convex portion depends on the properties of the ink used. When an aqueous ink is used, a silicone compound or a fluorine-containing compound is preferably used, and examples thereof include dimethylpolysiloxane, a fluorine-containing surfactant, a fluorine-containing acrylate or a polymer having them as a constituent, a fluorine-containing silicon compound and the like. .

In particular, when developing after the ink repellent treatment, from the viewpoint of durability, a compound containing a fluorine atom and a silicon atom in the molecule is preferable, and specifically, R-Si.
A compound represented by (-X) (-Y) -Z is preferable. It consists of four silicon rings, R-, X-, Y- and Z-.
It has a kind of base. This R- represents a hydrocarbon group containing a fluorine atom, and X-, Y-, and Z- each independently represent a hydroxyl group, a methyl group, an alkoxy group having 1 to 3 carbon atoms, a chlorine atom, or an isocyanate group. .

[0032] R- is R ^f -R ¹ - (provided that R ^f - is a perfluoroalkyl group, -R ¹ - is an alkylene group.) Is preferably a group represented by. In particular, -R ¹ -is -C
H ₂ CH ₂ - and which compounds are preferred. Such a compound generally called a fluorine-containing silane coupling agent or a fluorine-containing isocyanate silane is preferable because it has sufficient ink repellency and adhesiveness to the surface to be treated.

Fluorine-containing isocyanate silanes are particularly suitable because of their high adhesion to the surface to be treated. Also,
In the case of a fluorine-containing silane coupling agent, in order to enhance the reaction and fixing property to the base material, hydrolysis is performed in advance to substitute the terminal alkoxy group with a hydroxyl group or to cause a partial condensation reaction to generate a condensate. It can also be used in the form.

R above^f − Indicates that the hydrogen atom is completely fluorine
Represents a perfluoroalkyl group substituted with an atom, a representative
CF as a target_Three -, C₆ F₁₃-, C₈ F₁₇-, C
_TenF _{twenty one}-Etc. Moreover, those having a side chain structure
Can also be used. Above all, the view that high water repellency can be obtained
From the point, C₈ F₁₇-Is particularly preferable.

When the ink repellent treatment is carried out with these compounds, a method of diluting with a solvent and applying by a method such as spin coating, spray coating, roll coating, die coating, dip coating, and drying is used. It is preferable to use a perfluorinated compound as the solvent. In the process in which this treatment is performed, the photo-curable resin forming the convex portion is uncured, and it is necessary to prevent the resin forming the convex portion from being adversely affected. Therefore, it is preferable to use a solvent of a perfluorinated compound such as perfluorooctane, perfluoro (2-butyltetrahydrofuran), or perfluoro (tributylamine), which does not adversely affect the photocurable resin.

It is sufficient that the thickness of the treatment layer of this treatment agent is one molecule to several molecules of the treatment agent.

In the present invention, particularly when a fluorine-containing isocyanate silane is used, very high water repellency can be obtained, but the high water repellency may hinder cleaning. That is, an unnecessary portion of the uncured convex portion forming material that has been peeled off by the development may be redeposited on the pattern of the convex portion without being flushed with the cleaning liquid. As a method of avoiding this, there is a method of immersing the substrate after development in warm water and cooling it in cold water. As a result, the water repellency of the surface of the convex portion can be temporarily suppressed, and good cleaning performance can be secured by cleaning in this state.

The lowered water repellency is recovered by heating again in air. Usually, it can be recovered by heating in air in the subsequent firing step. The temperature of the hot water for immersing the substrate is preferably 40 to 80 ° C. If it is less than 40 ° C., the effect of suppressing water repellency is small, and if it exceeds 80 ° C., the convex portions are likely to swell. 50-70 degreeC is especially preferable.

The concave portion is surface-treated with an ink-affinitive treatment agent to make it ink-philic. Regarding the degree of the ink affinity, when a water-based ink is used, it is preferable that the ink affinity of the substrate of the recess is 30 ° or less when measured by water.
If this is larger than 30 °, the spread of the ink in the concave portion is deteriorated and the color loss easily occurs in the pixel corner portion. In particular, it is preferably set to 20 ° or less.

When a soda-lime glass substrate is used as the substrate, it may be caused by dirt when a large number of substrates are flown, but ink may be repelled in the recesses. The corners reduce this cissing. Also, when using a non-alkali glass substrate, repellency was more likely to occur than when using a soda lime glass substrate for some reason, but if the contact angle of water in the recess of the substrate is within the above range, the repellency will be Is greatly reduced.

FIG. 2 is a cross-sectional view schematically showing a situation in which this repelling occurs. In FIG. 2, 11 is a substrate
Reference numeral 2 denotes a convex portion formed thereon, and 16 denotes a colored layer sprayed on the concave portion between the convex portions. If the entire convex portion 12 has strong ink repellency and the concave portion does not have sufficient hydrophilicity, the sprayed ink is repelled by the convex portion and the central portion of the concave portion becomes as shown in FIG. Although it becomes thicker, the ink does not adhere sufficiently to the peripheral portion and becomes thin.

As a method for making the recesses ink-philic, the ink-affinitive treatment agent is applied to the substrate by a method such as spin coating, roll coating, spray coating, or die coating. Since the upper surface of the convex portion is treated with the ink repellent treatment agent, it is possible to easily impart the ink affinity to only the upper surface of the substrate of the concave portion.

The ink-affinity treating agent used in the present invention varies depending on the properties of the ink used. When using the water-based ink, hydrophilic silicone compounds and fluorine-containing compounds are preferable. For example, silicon-based surfactants, silicon-based leveling agents, fluorine-based surfactants, fluorine-based leveling agents, nonionic and anionic Examples thereof include compounds having a hydrophilic group such as surfactants.

In the case of subjecting these compounds to the ink-affinity treatment, a method of diluting with a solvent and applying by a method such as spin coating, spray coating, roll coating, die coating, dip coating, and drying is used. The solvent is not particularly limited, such as an organic solvent and water, but it is preferable to use an aqueous solvent.

In the present invention, the inkjet method is used as a coloring method. As the inkjet method, a method of continuously ejecting charged ink and controlling by an electric field, a method of ejecting ink intermittently by using a piezoelectric element, a method of heating ink and utilizing its foaming to eject intermittently etc,
Various methods can be adopted.

The ink used may be oil-based or water-based, and it is more preferable to use a water-based ink based on water in view of the surface tension. The coloring material contained in the ink can use both a dye and a pigment. From the viewpoint of durability, the use of a pigment is more preferable.

The ink of the present invention may be added with a component which is cured by heating or cured by energy rays such as ultraviolet rays in consideration of the step after coloring. Various thermosetting resins are widely used as components that are cured by heating, and examples of components that are cured by energy rays include those obtained by adding a photoreaction initiator to an acrylate derivative or a methacrylate derivative. Particularly, in consideration of heat resistance, those having a plurality of acryloyl groups and methacryloyl groups in the molecule are more preferable. Water-soluble acrylate derivatives and methacrylate derivatives are preferably used, and even water-insoluble ones can be used by emulsification.

In the present invention, ink of the three colors RGB is usually sprayed by the ink jet system to form color filters of three colors. This color filter includes a liquid crystal display element, an electrophoretic display element, an electrochromic display element,
Used as a display element in combination with ZT or the like. It can also be used for applications that use color cameras and other color filters.

FIG. 3 is a schematic cross-sectional view showing an example of use in a liquid crystal display element. In FIG. 3, 21 is a substrate, 22 is a convex portion, 23 is a colored layer, 24 is a flattening layer made of resin or the like covering the surface, 25 is In ₂ O ₃ —SnO _2.
(ITO), electrodes of SnO ₂ or the like, 26 is an alignment film of polyimide, polyamide, SiO or the like, 27 is the other substrate, 28
Is the other electrode, 29 is an alignment film, and 30 is a liquid crystal layer sandwiched between the electrodes. If necessary, a polarizing film, a reflection plate, a retardation plate, a light source, etc. may be arranged outside the liquid crystal cell to be used as a liquid crystal display element.

[0050]

【Example】

Example 1 A black-colored photoresist (V-259BK manufactured by Nippon Steel Chemical Co., Ltd.) was applied to a non-alkali glass substrate by a spin coating method so as to have a target film thickness of 1.5 μm.
C. for 5 minutes. C ₈ F, an ink repellent treatment agent
₁₇ -C ₂ H ₄ -Si a (-OCH _{3) 3} (Toshiba Silicone Co. TSL-8233) was diluted with methanol, was added a slight amount of water.

After allowing this to stand overnight, perfluoro (2
-Butyltetrahydrofuran) to extract the active ingredient,
It was diluted to 0.25% by weight, applied on the photoresist film by spin coating, and heated at 100 ° C. for 5 minutes. This substrate is exposed to 100 mJ through a photomask, immersed in a designated developer for 30 seconds, washed with cold water, and post-cured at 230 ° C. for 1 hour. The height also serving as a black mask is about 1.5 μm, and the width is about 1.5 μm. A substrate having a protrusion of about 30 μm was obtained.

3% by weight of Florard FC-1 was added to this substrate.
70C (Sumitomo 3M) aqueous solution was applied by spin coating, and then heated at 100 ° C for 5 minutes,
A substrate having an ink-philic treatment agent of 0.1 μm only on the substrate of the concave portion was obtained.

The concave portions surrounded by the convex portions of this substrate were sprayed with an aqueous pigment ink by an ink jet method to obtain a striped RGB color filter. Table 1 shows the results.

Example 2 The ink repellent treatment agent C ₈ F ₁₇ --C ₂ H ₄ --Si (-NC)
O) ₃ with perfluoro (tributylamine) 0.05
A color filter was formed in the same manner as in Example 1 except that the color filter was used after diluting to a weight percentage. Table 1 shows the results.

Example 3 After the developing step of Example 2, the sample was immersed in warm water of 60 ° C. for 30 seconds, immediately cooled with cold water, washed with cold water, and post-cured at 230 ° C. for 1 hour to form a color filter. Table 1 shows the results. In Example 2, the phenomenon of reattachment of the peeled portion was observed during cleaning, and the yield was lower than in Example 3.

Example 4 As a comparative example, a color filter was formed in the same manner as in Example 1 except that the ink-affinity treatment was not performed. Table 1 shows the results. Since the ink did not spread sufficiently in the pixels, there was a repelling around the recesses, and there was a portion where color loss occurred at the corners.

[0057]

[Table 1]

In the results shown in Table 1, "○" means that there were no such defects (good products), and "X" means that those defects occurred (defective products).

Examples 5 to 8 The glass substrates of Examples 1 to 4 were replaced with soda lime glass substrates to form color filters. As a result, Examples 5 to 7 which were subjected to the hydrophilic treatment gave the same results as Examples 1 to 3 in Table 1.
In the case of Example 8 in which the hydrophilic treatment was not carried out, there was also obtained one which did not cause repellency around the recesses. However, there was a considerable amount of cissing around the recesses, and the yield was considerably lower than in Examples 5-7.

Example 9 A color filter in which RGB colors were arranged in a mosaic pattern was manufactured in the same manner as in Example 1 except that the color filter pattern was formed in a dot shape. The characteristics of this color filter were the same as in Example 1.

A flattening layer of resin was formed on the color filters of Examples 1 and 5, ITO was formed, and this was patterned, and further an alignment film of resin was formed and rubbed to form a first layer.
Was formed. Next, ITO was formed on a glass substrate, which was patterned, a resin alignment film was formed, and rubbing was performed to form a second substrate. The first substrate and the second substrate were arranged so that the electrode surfaces face each other, and the periphery was sealed to form an empty cell.

A nematic liquid crystal was injected into these empty cells and the injection port was sealed to form a liquid crystal cell. A phase difference plate and a polarizing plate were arranged on both sides of the liquid crystal cell to manufacture an FSTN type liquid crystal display device. All of these liquid crystal display elements were capable of beautiful color display.

A flattening layer of resin was formed on the color filter of Example 9, ITO was formed, an alignment film of resin was further formed, and rubbing was performed to form a first substrate. Next, a resin alignment film was formed over a glass substrate provided with a thin film transistor and rubbed to form a second substrate. The first substrate and the second substrate were arranged so that the electrode surfaces face each other, and the periphery was sealed to form an empty cell.

Injecting nematic liquid crystal into this empty cell,
The inlet was sealed to form a liquid crystal cell. Polarizing plates were arranged on both sides of the liquid crystal cell to manufacture an active matrix type liquid crystal display device. This liquid crystal display device was capable of displaying beautiful colors.

[0065]

According to the present invention, when a color filter is manufactured by spraying ink with an ink jet system having high productivity, it is difficult for the ink to adhere to the convex portion and the ink spreads well in the concave portion. Color loss is less likely to occur within a pixel.

Further, according to the present invention, since the thickness of the colored layer in the pixel is easily made uniform, the flatness of the color filter is improved, and the gap between the substrates is easily made uniform in a liquid crystal cell. This can improve display performance as a liquid crystal display element.

The present invention can be applied in various ways within a range that does not impair the effects of the present invention.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a color filter of the present invention.

FIG. 2 is a schematic cross-sectional view showing a state when ink is sprayed in a conventional example.

FIG. 3 is a schematic cross-sectional view of a liquid crystal display device using the color filter of the present invention.

Claims (6)

[Claims] 1. A colored layer is formed by forming a convex portion having an ink repellent property on its upper surface on a substrate, spraying the ink on the concave portion separated by the convex portion by an inkjet method, and depositing the ink in the concave portion. In the method of manufacturing a color filter described above, a substrate having a recess whose surface is treated with an ink-affinitive agent is used. 2. A convex portion having an ink repellent property on its upper surface is formed on a substrate, and a water-based ink is sprayed onto the concave portion divided by the convex portion by an inkjet method to deposit the ink in the concave portion to form a colored layer. In the method of manufacturing a color filter to be formed, the ink affinity of the recesses is 20 ° at a contact angle of water.
A method of manufacturing a color filter, characterized in that: 3. The method of manufacturing a color filter according to claim 1, wherein the convex portion also serves as a black mask. 4. A water-based ink is used, and the lyophilic treatment agent which imparts lyophilicity to the surface of the recess is a water-soluble leveling agent or a water-soluble surfactant. 3. The method for producing a color filter according to item 3. 5. The color filter according to claim 1, wherein after the convex portion is formed on the substrate, the upper surface thereof is surface-treated with an ink repellent treatment agent to impart ink repellency. Production method. 6. A liquid crystal display device using a color filter formed by the manufacturing method according to claim 1, 2, 3, 4, or 5.