JP5040395B2 - Printed matter and method for producing printed matter - Google Patents

Description

  The present invention relates to a printed matter manufactured using an ink ejection device. As this printed matter, a color filter can be exemplified, and a colored layer of the color filter is formed using an ink discharge printing apparatus. Moreover, an electroluminescent element can also be illustrated as said printed matter, This organic light emitting layer is formed using an ink discharge apparatus. In addition, circuit boards, thin layer transistors, microlenses, biochips and the like can be exemplified as printed matter.

For example, various studies have been made on a method for forming a colored layer of the color filter, and a photolithography method, an ink discharge method, and the like are known as typical methods. The pixel pattern formation of the color filter by the photolithography method is to form a coating film of the photosensitive resin layer of each color on the entire substrate, and after exposing the pattern, unnecessary portions of the coating film are removed, and the remaining pattern is replaced with each pixel. To do. In this method, a large amount of material is wasted because most of the coating film is developed and removed. Furthermore, since the exposure and development processes are performed for each pixel, the number of processes increases. This photolithography system is used not only for color filters but also for manufacturing various optical elements and electric elements such as electroluminescence elements.
And the said problem of the photolithographic system became remarkable with the enlargement of the whole board | substrate, and came to show a problem both in cost and an environmental aspect. As a method for overcoming this problem, a method of manufacturing an optical element by an ink discharge method has recently attracted attention. For example, when a color filter is manufactured by an ink ejection method, resin compositions of three colors R, G, and B can be used as inks, and each color can be printed simultaneously in a single process. For this reason, ink materials such as pigments are not wasted, and the process for forming three-color pixels is shortened at the same time, so that it is possible to expect a reduction in environmental burden and a significant cost reduction.

  As described above, the ink ejection method can be applied to the manufacture of optical elements such as color filters and electroluminescent elements because the manufacturing process can be simplified and the cost can be reduced. However, as a problem of the ink ejection method, there are problems of “flatness of the colored ink layer”, “mixed color”, and “white spot”. Hereinafter, a case where a color filter is manufactured will be described as an example.

  “Flatness of the colored ink layer” means that the colored layer printed by the ink ejection method does not become a flat shape with a uniform film thickness, but a convex shape in which the film thickness at the center is thicker than the outer edge. was there. For this reason, the shape of each pixel of the color filter varies, and a problem called “white spot”, which will be described later, occurs at the outer edge portion with a thin layer thickness, and a problem of color unevenness due to a difference in chromaticity. The quality of the video display device manufactured in this way became a cause.

“White spots” are defects that occur mainly because the applied ink cannot sufficiently and uniformly diffuse into the area surrounded by the partition walls. This causes display defects such as lowering of the screen. White spots occur when the ink repellent oozes from the side surface of the partition wall. The exudation of the ink repellent agent from the side surface of the partition wall is promoted by heating. In the case where the partition walls are formed by a photolithography method, a resin composition to be the partition walls is applied to the substrate, exposed and developed using a mask, and then the partition walls are heated (post-baked). At this time, the ink repellent agent oozes out from a part of the partition wall, and the ink discharged from the ink discharge device does not spread and white spots occur.
In addition, when a photosensitive resin composition containing an ink repellent agent is applied onto a substrate, and this is exposed and developed to form a partition, the ink repellent agent present in the partition opening is not sufficiently removed by the developer, Even when the ink repellent agent remains in the pixel, white spots occur.

  “Mixed color” is a defect in which inks are mixed between adjacent pixels and colored inks of different colors are mixed. Color mixing occurs when the discharged ink overflows beyond the partition wall. In order to solve this problem, methods described in Patent Documents 1 to 5 have been proposed as a method of manufacturing a color filter substrate using an ink ejection method. In Patent Documents 1 to 5, a black resin layer containing an ink repellent agent such as a fluorine-containing compound is formed by a photolithography method or the like in order to prevent ink bleeding and color mixing in the ink ejection process of the ink. It is described to do.

  Hereinafter, a typical method for manufacturing an optical element using an ink ejection device will be described with reference to Patent Documents 1 to 4. Patent Documents 1 to 4 describe a method in which a fluorine-containing material is used as an ink repellent for the partition walls of a color filter manufactured by an ink ejection method. According to this method, color mixing by the ink ejection device can be prevented, but the colored ink layer has not been flattened due to the large surface roughness. The pigment concentration was lowered for flattening, but the light shielding layer did not exhibit sufficient light shielding properties, so that the color filter had a low contrast.

JP-A-6-347637 JP-A-7-35915 Japanese Patent Laid-Open No. 7-35916 JP 7-35917 A

  The present invention has been made to solve the above-described problems, and prevents color mixing and white spots in a printed material that is inexpensively manufactured by a simple process using an ink ejection method, and further, flatness of pixels of colored ink. It is an object to provide a high-quality and highly reliable printed matter.

The present inventor has been made based on such knowledge, and the configuration thereof will be shown below.
(Claim 1)
In a printed matter including a substrate, a partition that divides the surface of the substrate into a plurality of regions, and an ink film formed by an ink discharge device in an opening of the partition, the partition includes a resin component and an ink repellent component. An ink repellent material, and the ink repellent component is a compound including a structure having ink repellency and a structure compatible with resin;
The printed matter, wherein the partition wall has a surface roughness of 20 to 300 mm.

(Claim 2)
The printed matter according to claim 1, wherein the partition wall has a surface roughness of 50 to 300 mm.

(Claim 3)
The printed matter according to claim 1 or 2, wherein the partition wall has an optical density of 3.0 to 6.0.

(Claim 4)
The printed matter according to claim 1, wherein the ink repellent component has a structure having ink repellency that is a fluoroalkyl group.

(Claim 5)
The printed matter according to any one of claims 1 to 4, wherein the ink-repellent component has a structure having ink repellency and has a perfluoroalkyl group.

(Claim 6)
The printed matter according to claim 1, wherein the structure having compatibility with the resin of the ink repellent component is a structure containing at least a main chain of an alkyl group, an alkylene group, and a polyvinyl alcohol group.

(Claim 7)
The printed matter according to claim 1, wherein the partition includes a black light shielding member.

(Claim 8)
The printed matter according to claim 1, wherein the black light shielding member of the partition wall is carbon black, and the weighted average aggregate diameter of the particle diameter of the carbon black is 40 to 180 nm.

(Claim 9)
9. The substrate according to claim 1, wherein the substrate is a transparent substrate, the ink film is a colored layer formed of an ink containing a colorant, and a color filter having a plurality of colored layers. Printed matter according to any one of the above.

(Claim 10)
The substrate is a transparent substrate, the ink film is an organic light-emitting layer formed of an ink containing an organic light-emitting material, and is an organic electroluminescent element having a plurality of colors of organic light-emitting layers. The printed matter according to any one of claims 1 to 9.

  According to the present invention, in a printed matter, particularly a color filter, which includes a substrate, a partition partitioning the surface of the substrate into a number of regions, and an ink film formed in the opening of the partition, the partition includes a resin component and an ink repellent. The partition is made of an ink repellent material including a resin component and an ink repellent component, and the ink repellent component is a compound including a structure having ink repellency and a structure compatible with the resin. The partition wall has a surface roughness of 20 to 300 mm (more preferably 50 to 300 mm). By adopting the above configuration, it was possible to solve the problems of “pixel flatness”, “whiteout”, and “color mixing” in the prior art.

  Further, according to the present invention, since the optical density (OD value) of the partition walls of the printed material is set to 3.0 to 6.0, the contrast can be improved in the printed material such as a color filter and an organic electroluminescence element.

Hereinafter, preferred embodiments of the present invention will be described.
In addition, the optical material which comprises the display screen of a display can be mentioned as printed matter as used in the field of this invention. A large number of the regions of the optical member correspond to pixels constituting the display screen. Further, in this optical member, a black light shielding member can be mixed with the partition wall to function as a light shielding layer. By providing the light shielding layer, an effect of improving the contrast of the optical member is produced.
As an optical component, for example, a color filter constituting a display screen of a color liquid crystal display can be exemplified, and in this case, the ink film constitutes a colored layer for coloring transmitted light, and this colored layer has a different color for each of the regions. It has multiple colors.
Moreover, an organic electroluminescent element can also be illustrated as an optical component, and an ink film comprises an organic light emitting material layer in this case. In addition, the organic light emitting material layer of a plurality of colors having different colors for each region.
In addition to the optical parts, examples of the printed material according to the present invention include a circuit board, a thin film transistor, a microlens, and a biochip. Hereinafter, mainly color filters will be exemplified.

  The substrate of the present invention is used as a support substrate for printed matter. In the case of a color filter or an organic electroluminescence element, a known transparent substrate material such as a glass substrate, a quartz substrate, a plastic substrate, or a metal plate can be used as the substrate. Among them, the glass substrate is excellent in transparency, strength, heat resistance, and weather resistance.

The partition wall of the present invention has a function of dividing the surface of the substrate into a plurality of regions and preventing color mixing of inks printed in each of the many regions. In the present invention, by setting the surface roughness of the partition wall to 300 mm or less, the flatness of the colored ink layer can be improved, and further, ink color mixing and white spots can be prevented.
That is, in the prior art, when a color filter, an organic electroluminescence element, or the like is formed by an ink ejection method, the surface roughness of the partition wall is larger than 300 mm and the surface is rough. This originates from the aggregation of resin components, ink repellent components, pigments and additives.
For this reason, the colored ink discharged to the opening of the partition wall has a strong tendency to be repelled on the surface of the partition wall, and the colored pixels have an upwardly convex shape. That is, the pixel flatness is deteriorated. Moreover, since it becomes easy to repel ink on the side wall of the partition wall, there is a problem of promoting white spots. Therefore, in the present invention, the above problem could be solved by setting the surface roughness of the partition walls to 300 mm or less.
As specific means for reducing the surface roughness of the partition wall to 300 mm or less, polishing treatment, ultraviolet ozone treatment, excimer laser treatment, corona discharge treatment, oxygen plasma treatment, hot air treatment with a dryer, etc., chemical treatment with a developer or a solvent Although there are methods, etc., there is no limitation on the means as long as the desired surface roughness is ensured.
Further, if the surface roughness of the partition wall is less than 20 mm, the ink repellency of the partition wall is reduced, there is a possibility of causing color mixing, the surface reflectance is improved, and the adhesion to the substrate is further deteriorated. Therefore, the surface roughness of the partition wall is desirably 20 mm or more. More preferably, it should be 50 mm or more.
Moreover, in this invention, the optical characteristic of a color filter or an organic electroluminescent element becomes favorable by adjusting the optical density of a partition to 3.0-6.0. When the optical density is 3.0 or less, the light shielding property is insufficient and the contrast is lowered. On the other hand, when the value is 6.0 or more, only the outermost surface of the partition wall is cured, so that there is a problem that linearity is deteriorated. Further, when the printed material is an optical component that constitutes the display screen of the display, the contrast of the display screen can be improved by providing light shielding to the partition walls. In any case, the resin composition constituting the partition contains a resin component and an ink repellent component as essential components.
The resin component is a resin compound generally referred to as a binder resin. The resin component fixes and fixes the partition wall to the substrate and imparts ink resistance to the partition wall. The resin component is preferably a resin containing an amino group, an amide base, a carboxyl group, a hydroxyl group, or a carboxylic acid group. Specific examples include cresol-novolak resin, polyvinylphenol resin, acrylic resin, methacrylic resin, cardo resin, epoxy resin, polyimide resin, melamine resin, and the like. These resin binders may be used alone or in combination of two or more.
The ink repellent component imparts ink repellency to the partition walls. This ink repellent component includes a structure having compatibility with the resin and a structure having ink repellency in the compound structure. By forming the partition wall with the resin composition containing the ink repellency of the block copolymer having different properties as described above, the portion of the ink repellency component having the ink repellency is aged. Or on the partition wall surface by heating. On the other hand, the structure that is compatible with the resin of the ink repellent component is stopped on the surface of the partition wall with the partition wall inside, and “color mixing” and “white spot” can be prevented at the same time.
A fluoroalkyl group can be exemplified as the structure having water repellency, and more preferably a perfluoroalkyl group. As a site showing compatibility with the resin, a known lipophilic polymer structure such as an alkyl group, an alkylene group, or polyvinyl alcohol can be used.
In addition, as the ink repellent component, a fluorine-containing compound or a silicon-containing compound described later can be used at the same time. Specific examples of the fluorine-containing compound include vinylidene fluoride, vinyl fluoride, ethylene trifluoride and the like, and fluorinated resins such as copolymers thereof. These fluorine-containing compounds can be used alone or in combination of two or more. Examples of the silicon-containing compound include organic silicon in the main chain or side chain, and include silicon resins and silicone rubbers containing a siloxane component. These silicon-containing compounds can be used alone or in combination of two or more. Further, the fluorine-containing compound and the silicon-containing compound, or other ink repellent components may be used in combination.
The ink repellent agent in the present invention is preferably 0.01% by weight to 10% by weight with respect to the resin composition. In addition, the black light shielding member imparts light shielding properties to the partition walls and improves the contrast of the display screen. As the black light shielding member, black pigment, black dye, carbon black, aniline black, graphite, iron black, titanium oxide, inorganic pigment, and organic pigment can be used. These black light shielding members may be used alone or in combination of two or more.
Moreover, the resin composition can be used by diluting with an appropriate solvent as required. Specific examples of the solvent include dichloromethane, dichloroethane, chloroform, acetone, cyclohexanone, ethyl acetate, 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol, 2-ethylethoxyacetate, 2-butoxyethyl acetate, 2-methoxyethyl ether, 2-ethoxyethyl ether, 2- (2-ethoxyethoxy) ethanol, 2- (2-butoxyethoxy) ethanol, 2- (2′ethoxyethoxy) ethyl acetate, 2- (2-butoxyethoxy) ) Ethyl acetate, propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, diethylene glycol dimethyl ether, tetrahydrofuran and the like can be used. The amount of the solvent used is desirably a coating that is uniform when printed or coated on a substrate, and can form a coating film without pinholes and uneven coating. As a content ratio of such a solvent, it is preferable to prepare such that the solvent amount is 50 to 97% by weight with respect to the total weight of the resin composition.

  Further, the weighted average aggregated diameter of the entire carbon black is set to 40 to 180 nm. In this range, in particular, the surface roughness of the partition walls can be set to 20 to 300 mm, and further, the effects of high OD value, prevention of variation in surface roughness, and excellent developability can be obtained. More preferably, it is 50 nm-150 nm, Most preferably, it is 60 nm-120 nm, More preferably, it is 15 nm-70 nm.

In addition, compatible additives such as leveling agents, chain transfer agents, stabilizers, sensitizing dyes, surfactants, coupling agents, and the like can be added to the resin composition as necessary.
Next, the partition wall can be formed using a resin composition by a printing method, a photolithography method, a transfer method, or the like. In the case where the partition walls are formed by photolithography, a photosensitive resin composition obtained by imparting photosensitivity to the resin composition is used. Moreover, when forming a partition by a printing method, resin compositions, such as a thermosetting resin composition, can be used.

  Further, when the surface roughness of the partition wall is 300 mm or more, the surface roughness can be suppressed by polishing. As a polishing device, among polishing devices used for finishing, etc., not fixed abrasive polishing using polishing cloth or polishing film, fused alumina abrasive grain, sintered alumina abrasive grain, silica-based etc. So-called free abrasive polishing using a slurry-like abrasive is used. This is because the abrasive enters the space partitioned by the partition wall and the opening, and the effect of selectively polishing the partition wall upper portion and the wall surface is seen. In particular, when producing a large printed matter, it is preferable to use an apparatus (such as an Oscar type polishing machine) provided with a swing of an upper surface plate.

<Partition formation by printing method>
First, the case where the partition is formed by a printing method will be described. A resin composition (hereinafter referred to as a printing material) is printed on the substrate using a printing apparatus. The printing material includes a resin component (also referred to as a resin binder) and an ink repellent component (also referred to as an ink repellent) as essential components, and further includes a crosslinking agent and a solvent. Further, a black shielding member and the additive may be added. The surface roughness of the printing material is preferably 20 to 300 mm. If the surface roughness is 300 mm or more, the printability deteriorates. Subsequently, the printing material is heated in a range of 100 ° C. to 250 ° C. and 3 minutes to 60 minutes.

<Partition wall formation by photolithography>
A case where the partition walls are formed by photolithography will be described. A resin composition (hereinafter referred to as a photosensitive resin composition) is applied onto the substrate using a spin coater, a slit coater, or the like. Photosensitive resin compositions are broadly classified into positive and negative types. In the case of negative photosensitive resin compositions, resin components (also referred to as resin binders), monomers, photopolymerization initiators, and ink repellent components (ink repellent components). Also referred to as an agent). In the case of a positive photosensitive resin composition, it contains a positive photosensitive resin and the ink repellent component. If necessary, the photosensitive resin composition may further contain a crosslinking agent, a black shielding member, a pigment, a solvent, and the additives. The surface roughness of the photosensitive resin composition is preferably 20 to 300 mm. If it is larger than 300 mm, the applied resin composition is affected by irregularities on the substrate surface.

  Then, the board | substrate with which the photosensitive resin composition was apply | coated to one side is exposed using the mask of a partition pattern. The substrate is developed with a developing solution to remove unnecessary photosensitive resin composition, and partition walls are formed on the substrate. When the surface roughness of the applied resin composition is 300 mm or less, it becomes a partition wall with good linearity after development. Thereafter, the partition wall is heated at 100 to 250 ° C. for about 3 to 60 minutes.

  In order to optimize the surface roughness of the partition walls, the photosensitive resin composition is preferably adjusted to have a surface roughness in the range of 20 to 300 mm after being heated under specific heating conditions. When it exceeds 300 mm, when the optical material is printed by a printing apparatus, the color ink layer has a color filter with a large color unevenness of ΔEab (color difference) of 5 or more, and further, there is a problem of ink color mixture and white spots.

<Ink film formation by printing device>
By the method described above, a partition having ink repellency is formed on the substrate, and ink is applied to the opening of the partition using a printing device to form an ink film. As the printing method and printing method, known printing methods such as letterpress printing, screen printing, gravure printing, and reversal printing can be used.

<Ink film formation by ink ejection device>
By the above method, a partition having ink repellency is formed on the substrate, and ink is ejected to the opening of the partition using an ink ejection device to form an ink film. As an ink discharge device, there are a piezo conversion method and a heat conversion method depending on the discharge method, and the piezo conversion method is particularly preferable. It is preferable to use an apparatus in which the ink particleization frequency is about 5 to 100 KHz, the nozzle diameter is about 5 to 80 μm, a plurality of heads are arranged, and a number of nozzles are incorporated in one head. In addition, a known ink discharge device can be used. After the ink film is formed, the ink solvent can be dried and cured as necessary by heating.

<Photosensitive resin composition>
As a monomer applied to the photosensitive resin composition, a monomer having a vinyl group or an allyl group, an oligomer, or a molecule having a vinyl group or an allyl group at the terminal or side chain can be used. Specifically, (meth) acrylic acid and salts thereof, (meth) acrylic acid esters, (meth) acrylamides, maleic anhydride, maleic acid esters, itaconic acid esters, styrenes, vinyl ethers, vinyl esters, N -Vinyl heterocycles, allyl ethers, allyl esters, and derivatives thereof. Suitable compounds include, for example, relatively low molecular weight polyfunctional acrylates such as pentaerythritol triacrylate, trimethylolpropane triacrylate, pentaerythritol tetraacrylate, ditrimethylolpropane tetraacrylate, dipentaerythritol pentaacrylate, and hexaacrylate. it can. These monomers may be used alone or in combination of two or more. The amount of the monomer can be in the range of 1 to 200 parts by weight, preferably 50 to 150 parts by weight with respect to 100 parts by weight of the binder resin.

  Examples of the photopolymerization initiator include benzophenone compounds such as benzophenone, 4,4′-bis (dimethylamino) benzophenone, and 4,4′-bis (diethylamino) benzophenone. In addition, as photopolymerization initiators, 1-hydroxycyclohexyl acetophenone, 2,2-dimethoxy-2-phenylacetophenone, and 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one An acetophenone derivative such as can also be used. Further, thioxanthone derivatives such as thioxanthone, 2,4-diethylthioxanthone, 2-isopropylthioxanthone, and 2-chlorothioxanthone may be used. Moreover, anthraquinone derivatives such as 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butylanthraquinone, and chloroanthraquinone may be used. In addition, benzoin ether derivatives such as benzoin methyl ether, benzoin ethyl ether, and benzoin phenyl ether can also be used. Further, acylphosphine derivatives such as phenylbis- (2,4,6-trimethylbenzoyl) -phosphine oxide, 2- (o-chlorophenyl) -4,5-bis (4′-methylphenyl) imidazolyl dimer Lophine isomers such as N-arylglycine such as N-phenylglycine, organic azides such as 4,4′-diazidochalcone, 3,3 ′, 4,4′-tetra (tert-butylperoxycarboxy) Examples include benzophenone and quinonediazide group-containing compounds. These photopolymerization initiators may be used alone or in combination of two or more. The quantity of a photoinitiator can take the range of 0.1-50 weight part with respect to 100 weight part of binder resin, Preferably it is 1-20 weight part.

  The surface roughness described in the examples is measured with a Dektak 3030, the optical density (OD) is measured with a Macbeth RP918 optical densitometer, the linearity is judged by visual observation with an optical microscope, and ΔEab is measured with a microanalyzer. Then, the adhesion was evaluated by a substrate eye adhesion test method according to JIS K5400 using a pre-shear cooker tester.

Example 1
(Preparation of photosensitive resin composition for black matrix)
Binder resin; V259 (Nippon Steel Chemical Co., Ltd.) 100g
Compound having an unsaturated double bond; 1.65 g of pentaerythritol tetraacrylate
Photopolymerization initiator; oxime photopolymerization initiator (CGI-12 manufactured by Ciba Specialty Chemicals)
4) 4.95g
Dispersant: Commercial solution (manufactured by Mikuni Dye Co., Ltd.) EX-2 in which a black pigment is dispersed in a solvent together with a dispersant
906 159g
Solvent: 201 g of propylene glycol monoethyl ether acetate
Leveling agent; BYK-330 (by Big Chemie) 0.003g
Each component was mixed in the above ratio to obtain a photosensitive resin composition. Further, to this photosensitive resin composition, an ink repellent fluorine-containing compound “F179” (manufactured by Dainippon Ink Co., Ltd.) was added to the total solid weight (excluding the solvent weight of the solvent and the dispersant in the photosensitive resin composition). 0.1 wt% of the total weight) was added and stirred to prepare a photosensitive resin composition used for forming a black matrix (partition wall).

(Create a black matrix)
Non-alkali glass (Corning “# 1737”) was used as the substrate. The photosensitive resin composition was applied on the entire surface of the substrate in the form of a thin film having a thickness of 2.0 μm.

  The substrate was pre-baked. Thereafter, using a photomask having a lattice pattern, exposure was performed at 50 mJ / cm 2 with an ultrahigh pressure mercury lamp. Development processing was performed with a 10% aqueous sodium carbonate solution for 30 seconds to form a partition pattern of the resin composition.

  This substrate was placed in an oven and heat-cured at 180 ° C. for 10 minutes.

  After creating the black matrix (partition), grains of Φ80mm ~ 120mm with Osgar type polishing machine (polishing pressure 10.5g / cm2, upper platen speed 25rpm, rotation difference between upper platen and lower platen 8rpm, swing 10mm) Polishing time 60 second processing was performed using the abrasive | polishing agent of the sintered alumina abrasive grain which has a diameter distribution. Table 1 shows the results of measuring the surface roughness (A), the contact angle measurement with respect to the colored ink (B), the optical density (C), and the linearity (D) of the partition walls thus prepared. Since the OD value (optical density) of the partition wall of the color filter produced in Example 1 is good and has sufficient light shielding properties, it was confirmed that both can be used as a light shielding layer.

The OD value was obtained from the following equation from the incident light intensity I0 and the transmitted light intensity I of a 1 μm sample.
OD = -log (I / I0)

(Colored ink adjustment)
Methacrylic acid 20 parts by weight Methyl methacrylate 10 parts by weight Butyl methacrylate 55 parts by weight Hydroxyethyl methacrylate 15 parts by weight Butyl lactate 300 parts by weight Add 0.75 parts by weight of azobisisobutylnitrile under nitrogen atmosphere and add 5 parts at 70 ° C. An acrylic copolymer resin was obtained by reaction over time. The obtained acrylic copolymer resin was diluted with propylene glycol monomethyl ether acetate so that the resin concentration was 10% by weight to obtain a diluted solution of the acrylic copolymer resin.

  19.0 g of pigment and 0.9 g of polyoxyethylene alkyl ether as a dispersant were added to 80.1 g of this diluted solution, and kneaded with three rolls to obtain red, green and blue colored varnishes. . As a red pigment, Pigment Red 177, Pigment Green 36 as a green pigment, and Pigment Blue 15 as a blue pigment were used.

  Propylene glycol monomethyl ether acetate is added to each colored varnish so that the pigment concentration is 12 to 15% by weight and the viscosity is 15 cps, thereby obtaining red, green and blue colored inks. It was.

(Production of color filter)
Red, green, and blue colored inks are used for the black matrix opening provided on the substrate, and the colored ink is ejected by an ink ejecting apparatus equipped with a 12 pl, 180 dpi head, thereby producing red, green, and blue colors. Each colored layer was formed. Table 1 shows the color mixture (E), the presence or absence of white spots (F), and ΔEab (G) contrast ratio (H) in the ink ejection process of Example 1.

(Example 2)
(Formation of PEDOT layer)
A 3,4-polyethylenedioxythiophene (PEDOT) aqueous solution was applied to the substrate on which the transparent electrode ITO was patterned by a spin coating method to form a hole transport material layer.

  After creating the PEDPT layer, it has a particle size distribution of Φ80 mm to 120 mm with an Osgar type polishing machine (polishing pressure 10.5 g / cm2, upper platen speed 25 rpm, rotation difference 8 rpm between upper and lower platen, swing 10 mm). A polishing time of 30 seconds was performed using a sintered alumina abrasive.

(Formation of organic light emitting layer)
A 1.0% by weight toluene solution of polyarylene vinylene using polyarylene vinylene as an organic light emitting material was prepared as a printing ink. Using the flexographic printing proofing machine (manufactured by Matsuo Sangyo Co., Ltd.) equipped with a striped resin relief plate having a convex part of 120 μm and a concave part of 380 μm with respect to the opening of the partition wall provided on the substrate, the printing ink is Printing was performed to form an organic light emitting layer. Other organic light emitting materials include, for example, coumarin, perylene, pyran, anthrone, porphyrene, quinacridone, N, N′-dialkyl substituted quinacridone, naphthalimide, N, N′-diaryl substitution. Organic light-emitting materials that are soluble in organic solvents such as pyrrolopyrrole and iridium complexes, and organic light-emitting materials dispersed in polymers such as polystyrene, polymethyl methacrylate, and polyvinyl carbazole, polyarylene-based, polyarylene-based materials High molecular organic light emitting materials such as vinylene and polyfluorene are listed.

(Formation of organic EL elements)
Next, a Ca film having a thickness of 5 nm was formed on the organic light emitting medium layer as an electron injection layer of the sealing side electrode layer. Next, Al was formed as an electrode layer 52 with a thickness of 100 nm by the resistance heating method on the organic light emitting medium layer 4 on which the Ca film was formed. Finally, sealing was performed using a UV curable resin to obtain an organic EL element. Table 1 shows color mixture (E), presence / absence of white spots (F), and light emission unevenness (I) in the flexographic printing process of Example 2.

(Comparative Example 1)
In Example 1, it carried out by the same method as Example 1 except the weighted average aggregate diameter of the particle diameter of the pigment of the partition wall being 500 nm. The measurement results are shown in Table 1.

(Comparative Example 2)
The surface roughness of the partition walls in Example 1 was the same as that in Example 1, except that the weighted average aggregate diameter of the pigment particle diameter was 30 nm. The measurement results are shown in Table 2.

Claims (10)

A substrate,
A partition that divides the surface of the substrate into a plurality of regions;
In the printed matter including the ink film formed by the ink discharge device in the opening of the partition wall,
The partition is made of an ink repellent material including a resin component and an ink repellent component,
The ink repellent component is a compound having a structure having ink repellency and a structure having compatibility with a resin,
The printed matter, wherein the partition wall has a surface roughness of 20 to 300 mm.  The printed matter according to claim 1, wherein the partition wall has a surface roughness of 50 to 300 mm. The printed matter according to claim 1 or 2, wherein the partition wall has an optical density of 3.0 to 6.0.  The printed matter according to claim 1, wherein the ink repellent component has a structure having ink repellency that is a fluoroalkyl group.  The printed matter according to any one of claims 1 to 4, wherein the ink-repellent component has a structure having ink repellency and has a perfluoroalkyl group.  The printed matter according to claim 1, wherein the structure having compatibility with the resin of the ink repellent component is a structure containing at least a main chain of an alkyl group, an alkylene group, and a polyvinyl alcohol group.  The printed matter according to claim 1, wherein the partition includes a black light shielding member.  The printed matter according to claim 1, wherein the black light shielding member of the partition wall is carbon black, and the weighted average aggregate diameter of the particle diameter of the carbon black is 40 to 180 nm.  9. The substrate according to claim 1, wherein the substrate is a transparent substrate, the ink film is a colored layer formed of an ink containing a colorant, and a color filter having a plurality of colored layers. Printed matter according to any one of the above. The substrate is a transparent substrate, the ink film is an organic light-emitting layer formed of an ink containing an organic light-emitting material, and is an organic electroluminescent element having a plurality of colors of organic light-emitting layers. The printed matter according to any one of claims 1 to 8 .