JPH0921911A - Color filter and its production and liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to execute sticking of color filters and a counter substrate with high accuracy at the production of a liquid crystal panel by producing the color filters which are free from color mixing, unequal colors, color drop-outs, etc., and have high flatness with short stages at a low cost. SOLUTION: The parts where ink absorbability is high of a resin compsn. layer 3 having the parts where the ink absorbability is low and the parts where the ink absorbability is high disposed on a substrate 1 are subjected to coloring by an ink jet method and thereafter, the level difference between the colored parts and the non-colored parts 8 is lessened to <=0.5μm by disposing the standby time. The colored resin compsn. layer 3 is then cured by either of photo- irradiation and combination use of the photo-irradiation and heat treatment, by which the color filters are produced. The liquid crystal panel is produced by using such filters.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a color filter applicable to a color filter of a color liquid crystal display used for a color television, a personal computer, an automobile navigation system, a small television, etc. The present invention relates to a method for manufacturing a color filter. The present invention also provides
The present invention relates to a coating material for producing a color filter using an inkjet recording technique and a method for producing a color filter using the coating material. The present invention also relates to a color filter manufactured using an inkjet method and a liquid crystal panel including the color filter.

[0002]

2. Description of the Related Art In recent years, with the development of personal computers, especially portable personal computers, the demand for liquid crystal displays, especially color liquid crystal displays, has been increasing. However, cost reduction is required for further popularization, and there is an increasing demand for cost reduction of a color filter, which has a large specific gravity in terms of cost.

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 which satisfies all the required characteristics. Hereinafter, each method will be described.

The first and most frequently used method is the dyeing method. The dyeing method involves first forming a layer of a water-soluble polymer material, which is a material for dyeing, on a glass substrate, patterning this into a desired shape by a photolithography process, and then immersing the obtained pattern in a dyeing bath. To obtain a colored pattern. By repeating this three times, R, G,
A color filter layer of B is formed.

[0005] The second method is a pigment dispersion method, which has recently been replaced by a dyeing method. In this method, first, 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. Further, this step is repeated three times to form R, G, and B color filter layers.

A third method is an electrodeposition method. In this method, first, a transparent electrode is patterned on a substrate, and a pigment,
The first color is electrodeposited by dipping in an electrodeposition coating solution containing a resin, an electrolytic solution or the like. This process is repeated 3 times to form R, G, B color filter layers. It is the one that is fired at the end.

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

[0008]

However, what is common to these methods is that the same process needs to be repeated three times in order to color the three colors of R, G and B, resulting in high cost. That is. Also. There is a problem that the yield decreases as the number of processes 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 because of poor resolution.

As a method of manufacturing a color filter using an ink jet in order to make up for these drawbacks, Japanese Patent Laid-Open No. 59-59 has been proposed.
-75205, JP-A-63-235901, JP-A-1-
There is a proposal in 217320 etc., but it is still insufficient.

Therefore, an object of the present invention is to solve the problems of these conventional methods and to satisfy the necessary characteristics in heat resistance, solvent resistance, resolution, etc., of high reliability, and to improve the bonding accuracy when forming a liquid crystal panel. An object of the present invention is to provide a manufacturing method for manufacturing a color filter excellent in high flatness at a low cost in a short process, a highly reliable color filter, and a liquid crystal panel. In particular, it is an object of the present invention to provide an excellent method for producing a color filter which does not cause color mixture or color loss when a colored portion is formed with a dye ink by an inkjet method.

[0011]

The present invention provides a method of manufacturing a color filter including a step of forming a colored portion on a substrate by ejecting ink using an ink jet method. (1) Light irradiation or light irradiation on the substrate And (2) a step of forming a resin composition layer whose ink absorbency changes by heat treatment, and (2) a predetermined portion of the resin composition layer formed on the substrate is irradiated with light or irradiated with light and heat-treated to form an ink. A step of forming a portion which should be a non-colored portion having a relatively low absorptivity and a portion which should be a colored portion having a relatively high absorptivity, (3) ink is ejected by an ink jet method to be formed on a substrate Coloring the portion of the resin composition layer having a relatively high ink absorbability, (4) irradiating the colored resin composition layer with light and light, after providing a waiting time from the application of the ink. Morphism and cured either by heat treatment of the combination, the step between the colored portion and the non-colored portion 0.5
a method for producing a color filter, including a step of making the thickness of the film to be equal to or less than μm, a color filter produced by the method, and a substrate facing the color filter and the filter, and a liquid crystal compound enclosed between the substrates Liquid crystal panel is provided.

In the step (2), even if the method of exposing the portion of the resin composition layer to be colored to relatively increase the ink absorbability of the portion, the resin composition layer The non-colored portion may be exposed to light so that the ink absorption of the portion is relatively low.

According to the present invention, in the above manufacturing method, a black matrix is previously formed on a substrate on which a layer of the resin composition whose ink absorbency is changed by the light irradiation or the light irradiation and the heat treatment is formed. The present invention also provides a manufacturing method for forming a portion of the resin composition layer having relatively low ink absorbability on the black matrix, in which case the width of the non-colored portion is preferably narrower than the width of the black matrix. .

Further, the present invention also provides a manufacturing method for forming a protective layer after the colored resin composition layer is cured by the above manufacturing method.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings.

FIG. 1 is a process chart showing the procedure of one embodiment of the method for producing a color filter of the present invention.

In the present invention, a glass substrate is generally used as a substrate, but the substrate is not limited to a glass substrate as long as it has necessary properties such as transparency and mechanical strength as a color filter. FIG. 1A is a diagram showing a glass substrate 1 on which a black matrix 2 is formed.

First, a resin composition curable by light irradiation is applied onto the substrate 1 on which the black matrix 2 is formed, prebaked if necessary, and a resin composition layer 3 curable by light irradiation. To form (Fig. 1
(B)). In this case, an example is shown in which the resin composition layer that can be cured only by light irradiation is cured, but there is no problem even if the resin composition uses both light irradiation and heat treatment. As a base resin for such a resin composition, an acrylic resin, an epoxy resin, an amide resin, or the like is used, but is not particularly limited thereto. And
It is also possible to use a photoinitiator (crosslinking agent) in these resins in order to promote the crosslinking reaction by light or a combination of light and heat.

As the photoinitiator, dichromate, bisazide compound, radical initiator, cationic initiator, anionic initiator, etc. can be used. Further, these photoinitiators can be mixed or used in combination with other sensitizers. Furthermore, it is also possible to use a photo-acid generator such as an onium salt together with a crosslinking agent. In addition, in order to further promote the crosslinking reaction, heat treatment may be performed after the light irradiation.

The resin layer is formed by spin coating,
A coating method such as mouth coating, bar coating, spray coating, or dip coating can be used and is not particularly limited.

Next, the resin composition layer in the portion shielded from light by the black matrix is cured by pattern exposure in advance (FIG. 1 (c)), and then each color of R, G and B is colored by an inkjet method. (Fig. 1
(D)). At the time of this coloring, depending on the applied ink,
The resin layer swells and rises compared to the non-colored part (Fig. 2
(A)).

A photomask having an opening for hardening a light-shielding portion by a black matrix is used as a photomask for pattern exposure. At that time, in order to prevent color loss in a portion in contact with the black matrix, considering that a large amount of ink needs to be ejected, it is preferable to use a mask having an opening portion narrower than the light shielding width of the black matrix. preferable.

As the ink used for coloring, it is possible to use both dye-based and pigment-based inks, and liquid ink,
Although solid ink can be used, when a water-based ink is used, it is preferable to form the resin layer from a resin composition having high water absorption. Further, as the ink jet method, a bubble jet type using an electrothermal converter as an energy generating element, a piezo jet type using a piezoelectric element, or the like can be used, and a coloring area and a coloring pattern can be arbitrarily set. . Further, in the example shown in FIG. 1, the black matrix is formed on the substrate. However, the black matrix is formed on the resin layer after forming the resin composition layer curable by light irradiation or after coloring. However, the form is not limited to the example shown in this figure. Further, as a method of forming the metal thin film, a method of forming a metal thin film on the substrate by sputtering or vapor deposition and patterning by a photolithography process is general, but not limited to this.

Then, the colored resin composition is cured by performing light irradiation or a combination of light irradiation and heat treatment (see FIG. 1).
(E)). The swelling of the colored portion described above is reduced by this curing step, but it is important to set it to 0.5 μm or less with respect to the non-colored portion.

At this time, it is not preferable to perform light irradiation or light irradiation and heat treatment immediately after coloring. When light irradiation or light irradiation and heat treatment is performed immediately after coloring, the step is fixed as it is at the time of coloring, and the rise of the colored portion with respect to the non-colored portion is more likely to exceed 0.5 μm. The reason for this is that the colored ink does not enter the resin immediately, but it depends on the ink used and the resin layer. is required. The time is about 1 to 60 minutes. Leveled by the time left,
The level difference between the colored portion and the non-colored portion is reduced to an appropriate degree (FIG. 2B). Further, the dye in the ink can also color the inside of the pixel portion evenly to the end portion.

Next, a protective layer is formed if necessary (FIG. 1 (f)). As the protective layer, a photocurable type, a thermosetting type or a photothermal combined type resin material, an inorganic film formed by vapor deposition, sputtering or the like can be used, and has transparency when used as a color filter, Any material that can withstand the subsequent ITO formation process, alignment film formation process, etc. can be used.

Next, another embodiment of the method for manufacturing a color filter of the present invention will be described with reference to FIGS.

A glass substrate is generally used as the substrate, but the substrate is not limited to the glass substrate as long as it has necessary properties such as transparency and mechanical strength as a color filter. FIG. 3A is a diagram showing a glass substrate 1 on which a black matrix 2 is formed.

First, a resin composition according to the present invention is applied onto a substrate on which a black matrix is formed, and if necessary, prebaking is performed so that the ink absorbability of the light-irradiated portion is increased by light irradiation or light irradiation and heat treatment. A resin layer 3 that rises is formed (FIG. 3B). The present invention is intended to prevent color mixing of ink and excessive diffusion of ink by utilizing a difference in ink absorbency between an exposed portion and an unexposed portion of the resin composition layer, and a resin composition to be applied. As the material, in the present embodiment, a resin composition in which the ink absorbency of the exposed area is increased by exposure or combined use of exposure / heat treatment is used.
In the example of this figure, the ink absorbency is increased only by light irradiation, but there is no problem if heat treatment is also used.

At this time, as the resin composition as described above, specifically, a system utilizing a reaction by chemical amplification is preferable, and as the base resin, a hydroxyl group of a cellulose derivative such as hydroxypropyl cellulose or hydroxyethyl cellulose is used. , Those that have been modified by stealing or those that have been blocked with an acetyl group (eg, cellulose acetate-based compounds, etc.); those that have the functional hydroxyl groups of polymeric alcohols such as polyvinyl alcohol and their derivatives blocked with steric groups, etc. (Example: polyvinyl acetate compounds, etc.); Novolak resins such as cresol novolac, polyparahydroxystyrene and derivatives thereof in which the hydroxyl groups are blocked with, for example, trimethylsilyl groups, but of course, In the invention The present invention is not limited to, et al.

As the photoinitiator, onium salts such as triphenylsulfonium hexafluoroantimonate,
A halogenated organic compound such as trichloromethyltriazine, or naphthoquinonediazide or a derivative thereof is preferably used, but it is not limited to these. As a result, when light irradiation / heat treatment is used, Any composition may be used as long as it has a composition that increases ink absorbability.

Further, the resin layer is formed by spin coating,
A coating method such as mouth coating, bar coating, spray coating, or dip coating can be used and is not particularly limited.

Next, the exposed portion of the resin composition, which is not shielded by the black matrix, is subjected to pattern exposure in advance to make the exposed portion ink-philic (FIG. 3 (c)) to form a latent image (FIG. 3). 3 (d)).

Subsequently, by using the ink jet head 5, the same layer is colored with each color of R, G and B (see FIG. 3).
(E)), if necessary, the ink is dried. During this coloring, the resin layer in the portion colored by the jet ink swells and rises with respect to the non-colored portion (see FIG. 4).
(A)).

At this time, in the exposed portion, the amount of hydrophilic groups such as hydroxyl groups, alkoxy groups, and amino groups increases as the reaction progresses, and the ink absorbability is improved. Therefore, color mixing between colors should be prevented. You can In order to cause a substantial difference in ink absorbability, it is generally preferable that the conversion rate of the functional group that can be converted into a hydrophilic group into a hydrophilic group is 30% or more.

In this case, the hydrophilic group can be quantified by IR,
Spectral analysis such as NMR is effective. Further, as the photomask 4 at the time of pattern exposure, one having an opening portion for exposing an opening portion which is not shielded by the black matrix is used. At this time, considering that it is necessary to eject a large amount of ink in order to prevent color loss in the portion in contact with the black matrix, it is preferable to use a mask having an opening wider than the light shielding width of the black matrix. preferable. Further, as shown in FIGS. 5A and 5B, it is possible to form a latent image by using the black matrix as it is as a mask and exposing from the back surface.

As the ink used for coloring, it is possible to use both dye-based and pigment-based inks, but in the present invention, the alkaline type is more preferred. Further, as the ink jet method, a bubble jet type using an electrothermal converter as an energy generating element, a piezo jet type using a piezoelectric element, or the like can be used, and a coloring area and a coloring pattern can be arbitrarily set. . Further, in the example shown in FIG. 3, the black matrix is formed on the substrate. However, as shown in the process diagram of FIG. 6, the black matrix is formed by forming the resin composition layer or after coloring the resin composition. There is no particular problem even if it is formed on a layer, and its form is not limited to the example of FIG. In addition, as its formation method, a metal thin film is formed on the substrate by sputtering or vapor deposition,
A method of patterning by photolithography is generally used, but the method is not limited thereto.

Next, the colored coating material is cured by light irradiation, heat treatment or a combination of light irradiation and heat treatment. At this time, the swelling of the colored portion is reduced by the curing step, but it is important to set it to 0.5 μm or less with respect to the non-colored portion.

At this time, it is not preferable to perform light irradiation or light irradiation and heat treatment immediately after coloring. When light irradiation or light irradiation and heat treatment is performed immediately after coloring, the step is fixed as it is at the time of coloring, and the rise of the colored portion with respect to the non-colored portion is more likely to exceed 0.5 μm. The reason for this is that the colored ink does not enter the resin immediately, but it depends on the ink used and the resin layer. is required. The time is about 1 to 60 minutes. Leveled by the time left,
The level difference between the colored portion and the non-colored portion is reduced to an appropriate degree (FIG. 4B). Further, the dye in the ink can also color the inside of the pixel portion evenly to the end portion.

Next, a protective layer is formed if necessary (FIG. 3 (f)). As the protective layer, a photocurable type, a thermosetting type or a photothermal combined type resin material, an inorganic film formed by vapor deposition, sputtering or the like can be used, and has transparency when used as a color filter, Any material that can withstand the subsequent ITO formation process, alignment film formation process, etc. can be used.

7 and 8 are sectional views showing an example of a TFT color liquid crystal panel incorporating a color filter according to the present invention. The mode is not limited to this example. In FIG. 5, 1 is a glass substrate, 2 is a black matrix, 3 is a resin layer, 6 is a protective film layer, 8 is a non-colored portion, 9 is a color filter, 10 is a common electrode, 11 is an alignment film, and 12 is a liquid crystal compound. , 13 is a pixel electrode, 14 is a glass substrate (opposing substrate), 15 is a polarizing plate, and 16 is backlight light.

In the color liquid crystal panel, the liquid crystal compound 1 is generally prepared by combining the color filter substrate and the counter substrate 14.
2 is formed. A TFT (not shown) and a transparent pixel electrode 1 are provided inside the substrate on the other side of the liquid crystal panel.
3 are formed in a matrix. In addition, inside the other substrate 1, a color filter 9 is installed so that RGB color materials are arranged at positions facing the pixel electrodes, and a transparent counter electrode (common electrode) 10 is provided on one surface of the color filter 9. It is formed. The black matrix is usually formed on the color filter substrate side (FIG. 7), but in the BM on array type liquid crystal panel, it is formed on the TFT substrate side facing (FIG. 8). Further, an alignment film 11 is formed in the planes of both substrates, and rubbing the alignment film 11 allows liquid crystal molecules to be aligned in a certain direction. A polarizing plate 15 is adhered to the outside of each glass substrate, and the liquid crystal compound 12 has a gap (2) between these glass substrates.
To about 5 μm). As a backlight, a combination of a fluorescent lamp (not shown) and a scattering plate (not shown) is generally used, and a liquid crystal compound is displayed by functioning as an optical shutter for changing the transmittance of the backlight. I do.

[0043]

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

(1) 10 parts by weight of a terpolymer of N-methylolacrylamide, methyl methacrylate and hydroxyethyl methacrylate (charge ratio 20:30:50) and (2) triphenylsulfonium triflate (manufactured by Midori Kagaku: TPS-105) (0.2 parts by weight) is prepared to prepare a composition having 0.2% by weight of water-based ink and having a reduced ink absorptivity in a light-irradiated portion by light irradiation or a combination of light irradiation / heat treatment, whereby a black matrix is formed. A glass substrate was spin-coated and subjected to a bake at 60 ° C. for 10 minutes to form a resin composition layer in which the ink absorbability of the light-irradiated portion was lowered by light irradiation or a combination of light irradiation / heat treatment. At this time, the film thickness was 1 μm.

Next, a part of the resin layer on the black matrix was pattern-exposed through a photomask having an opening portion narrower than the width of the black matrix, and the ink absorbency of the part was lowered.

Then, the R, G and B matrix patterns of the openings were colored with a dye ink using an ink jet printer.

The composition of the used ink is as follows. R ink dye: CIAcid Red 118 5 parts by weight N-methyl-2-pyrrolidone 15 parts by weight Engineering ethylene glycol 25 parts by weight ion-exchanged water 55 parts by weight G ink dye: CIAcid Green 25 5 parts by weight N-methyl-2-pyrrolidone 15 Part by weight Engineering Tilen Glycol 20 parts by weight Ion-exchanged water 60 parts by weight B Ink Dye: CIAcid Blue 113 5 parts by weight N-Methyl-2-pyrrolidone 15 parts by weight Engineering Tiren glycol 20 parts by weight Ion-exchanged water 60 parts by weight 15 minutes after that, It was left in an environment of 23 ° C. and a humidity of 55%. Then, the ink was dried at 90 ° C. for 5 minutes. Subsequently, the colored resin composition layer was cured by heat treatment at 230 ° C. for 1 hour to produce a color filter of the present invention. At this time, the step difference between the colored portion and the non-colored portion was 0.3 μm.

When the color filter thus produced was observed with an optical microscope, color mixing, color unevenness,
No defects such as color loss were observed.

Further, when a liquid crystal panel was manufactured using this color filter, the bonding with the counter substrate and the encapsulation of the liquid crystal compound are highly accurate, and driving the panel enables high-definition color display. there were.

Example 2 A glass substrate having a black matrix formed thereon was spin-coated with a photocurable resin composition comprising a bisphenol A type epoxy resin and a cationic photopolymerization initiator so as to have a film thickness of 2 μm. Prebaking was performed at 90 ° C. for 20 minutes to form a photocurable resin layer.

Next, a part of the resin layer on the black matrix is pattern-exposed through a photomask having an opening narrower than the width of the black matrix, and the pattern exposure is performed at 120 ° C. for 1 hour.
A heat treatment was performed for 0 minutes to cure the exposed portion. further,
The R, G, and B matrix patterns were colored with dye ink using an inkjet printer. The ink used was the same as in Example 1. After coloring, it was left for 20 minutes in an environment of 23 ° C. and 55% humidity. And
The ink was dried at 90 ° C. for 5 minutes. Subsequently, after the entire surface was exposed, the resin layer was completely cured by heat treatment at 200 ° C. for 1 hour to produce a color filter of the present invention. At this time, the step difference between the colored portion and the non-colored portion was 0.2 μm.

Observation of the thus-prepared color filter with an optical microscope revealed that color mixing, color unevenness,
No defects such as color loss were observed.

Further, when a liquid crystal panel was manufactured using this color filter, the bonding with the counter substrate and the encapsulation of the liquid crystal compound are highly accurate, and driving the panel enables high-definition color display. there were.

Example 3 On a glass substrate having a black matrix formed thereon, (1) 100 parts by weight of polyparahydroxystyrene having a hydroxyl group protected by a trimethylsilyl group and (2) a cationic photopolymerization initiator (manufactured by ADEKA: SP-1
70) 5 parts by weight of light irradiation and heat treatment were spin-coated with a resin composition having a thickness of 2 μm to increase the ink absorbability of the light irradiation portion, and prebaked at 90 ° C. for 20 minutes to perform light irradiation. A layer of the resin composition in which the ink absorbency of the light-irradiated portion is increased by heat treatment was formed.

Then, through a photomask having an opening wider than the width of the black matrix, 1.5 J / cm.
The resin layer of the opening portion other than on the black matrix was pattern-exposed with an exposure amount of ² and subjected to an ink-philic treatment. Furthermore, the R, G, and B matrix patterns were colored with dye ink using an inkjet printer. The ink used was the same as in Example 1. After coloring, it was left for 15 minutes in an environment of 23 ° C. and a humidity of 55%. And
The ink was dried at 90 ° C. for 5 minutes. Subsequently, after the entire surface was exposed, the resin layer was completely cured by heat treatment at 200 ° C. for 1 hour to produce a color filter of the present invention. At this time, the step difference between the colored portion and the non-colored portion was 0.4 μm.

Further, a two-component thermosetting resin SS-7625 (manufactured by JSR) is formed on the resin layer as a protective layer to a film thickness of 1 μm.
Was spin-coated so as to obtain a heat treatment at 230 ° C. for 1 hour to be cured.

When the color filter thus produced was observed with an optical microscope, color mixing, color unevenness,
No defects such as color loss were observed.

Further, when a liquid crystal panel was manufactured using this color filter, the bonding with the counter substrate and the encapsulation of the liquid crystal compound are highly accurate, and driving the panel enables high-definition color display. there were.

(Comparative Example 1) After coloring R, G and B by the ink jet method, 90 hours was immediately set without leaving a standing time.
The ink was dried at 5 ° C. for 5 minutes. Continue to 230
The colored resin composition layer was cured by heat treatment at 1 ° C. for 1 hour to prepare a color filter of the present invention. At this time, the step difference between the colored portion and the non-colored portion was 0.7 μm.

When the color filter thus manufactured was observed with an optical microscope, an obstacle of color unevenness in the pixel was recognized. Furthermore, when a liquid crystal panel was manufactured using this color filter, a problem occurred in bonding with a counter substrate and encapsulating a liquid crystal compound, resulting in misalignment.

[0061]

As described above, according to the present invention, it is possible to manufacture a color filter having high flatness and high reliability, which is free from obstacles such as color mixture, color unevenness, and color loss in a short process at low cost. When manufacturing a liquid crystal panel using the color filter, the color filter and the counter substrate can be bonded together with high accuracy, and a highly reliable liquid crystal panel can be obtained.

[Brief description of drawings]

FIG. 1 is a process drawing showing one embodiment of a color filter manufacturing method of the present invention.

FIG. 2 is a schematic diagram showing a rising state of the ink after being applied to the colored portion of the resin composition layer in the step of FIG.
(A) is a diagram showing a state immediately after application, and (b) is a diagram showing a state after being left for a predetermined time.

FIG. 3 is a process drawing showing another embodiment of the color filter manufacturing method of the present invention.

FIG. 4 is a schematic diagram showing a rising state of the ink after being applied to the colored portion of the resin composition layer in the step of FIG.
(A) is a diagram showing a state immediately after application, and (b) is a diagram showing a state after being left for a predetermined time.

FIG. 5 is a diagram showing an alternative method of steps (c) and (d) of the manufacturing method of the present invention shown in FIG.

FIG. 6 is a process drawing showing still another embodiment of the color filter manufacturing method of the present invention.

FIG. 7 is a schematic cross-sectional view of an example of a liquid crystal panel manufactured using the color filter of the present invention.

FIG. 8 is a schematic cross-sectional view of another example of a liquid crystal panel manufactured using the color filter of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 2 Black matrix 3 Resin composition layer 4 Photomask 5 Inkjet head 6 Protective layer 7 Light transmission part 8 Non-colored part 9 Color filter 10 Common electrode 11 Alignment film 12 Liquid crystal compound 13 Pixel electrode 14 Glass substrate 15 Polarizing plate 16 Back Light light

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akinori Shiota 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (9)

[Claims] 1. A method of manufacturing a color filter including a step of forming a colored portion on a substrate by ejecting ink using an ink jet method, comprising: (1) irradiating the substrate with light or changing the ink absorbability by light irradiation and heat treatment. Forming a layer of the resin composition, and (2) applying a light irradiation or a light irradiation and a heat treatment to a predetermined portion of the resin composition layer formed on the substrate so that the ink absorbability is relatively low. A step of forming a portion to be a colored portion and a portion to be a colored portion having a relatively high ink absorbency; (3) Ink of a resin composition layer formed on a substrate by ejecting ink by an inkjet method A step of coloring a portion having a relatively high absorptivity, (4) after providing a waiting time from the ink application,
A step of curing the colored resin composition layer by either light irradiation or a combination of light irradiation and heat treatment to make a step between the colored portion and the non-colored portion 0.5 μm or less. Method for manufacturing color filter. 2. The waiting time in the step (4) is 1 to 60.
The production method according to claim 1, wherein the production time is set to minutes. 3. The production method according to claim 1, wherein in the step (2), the portion of the resin composition layer to be colored is exposed to relatively increase the ink absorbability of the portion. 4. The manufacturing method according to claim 1, wherein in the step (2), the non-colored portion of the resin composition layer is exposed to relatively lower the ink absorbability of the portion. 5. A black matrix is previously formed on a substrate on which a resin composition layer whose ink absorbency is changed by the light irradiation or the light irradiation and heat treatment is formed, and the ink absorbency of the resin composition layer is relatively high. 5. A method according to any one of claims 1 to 4, wherein the lower portion is formed on the black matrix. 6. The manufacturing method according to claim 5, wherein the width of the non-colored portion is narrower than the width of the black matrix. 7. After curing the colored resin composition layer,
The manufacturing method according to claim 1, wherein a protective layer is formed. 8. A color filter manufactured by the manufacturing method according to claim 1. 9. A liquid crystal panel comprising the color filter according to claim 8 and a substrate facing the filter, and a liquid crystal compound being sealed between both substrates.