WO2010018806A1 - カラーフィルターの製造方法、カラーフィルター基板およびカラーフィルター - Google Patents
カラーフィルターの製造方法、カラーフィルター基板およびカラーフィルター Download PDFInfo
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- WO2010018806A1 WO2010018806A1 PCT/JP2009/064113 JP2009064113W WO2010018806A1 WO 2010018806 A1 WO2010018806 A1 WO 2010018806A1 JP 2009064113 W JP2009064113 W JP 2009064113W WO 2010018806 A1 WO2010018806 A1 WO 2010018806A1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/022—Quinonediazides
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
- G02F1/133516—Methods for their manufacture, e.g. printing, electro-deposition or photolithography
Definitions
- the present invention relates to a method for manufacturing a color filter (hereinafter sometimes abbreviated as “CF”), a CF, and an image display apparatus using the CF, and more specifically, a black matrix (hereinafter abbreviated as “BM”) of a CF substrate.
- CF manufacturing method for forming colored pixels of each color in the gaps between the walls formed above, the CF substrate formed by the above method, the CF formed using the CF substrate, and the image using the CF substrate The present invention relates to a display device.
- LCD color displays are used as information display members for personal computers, mobile information devices, televisions, projectors, monitors, car navigation systems, mobile phones, electronic calculators and electronic dictionaries. It is used in a wide variety of applications such as bulletin boards, information bulletin boards, displays for function display boards, sign boards, and shooting screens for digital cameras and video cameras.
- CFs mounted on liquid crystal color displays are also required to have higher quality in terms of image performance such as sharpness, transparency, and contrast. Both of the increase in size and the increase in size have been demanded, and in all of them, it is required to provide CF at low cost.
- CF BM a single layer chromium by a metal chromium film formed by vapor deposition, a low-reflection chromium layered on a chromium oxide layer, a chromium-based BM of ultra-low reflection chromium, and a black color such as a carbon black pigment or a titanium suboxide pigment.
- a black resin BM is used in which a pigment, a blue pigment, a violet pigment, and a black-toned pigment are dispersed in the resin.
- the pixel is often formed by a manufacturing method called “photolithographic method”.
- red, green, and blue in the present invention, the colors of the pixels are simply referred to as “R color, G color, B color” or simply “R, G, B” in order to distinguish them from the pigment color).
- the photolithographic method has a problem in that CF is produced through the above-described many steps, and the disadvantage that the ratio of effective colored ink to be used is low has not been improved.
- IJ ink jet
- this method has a problem with the viscosity of the IJ ink. That is, when the colored ink is ejected into the pixel forming space, if the ink viscosity is low, the ink also flows onto the BM, and if the ink viscosity is low, the ink is partially mixed between the pixels. There was a risk of causing. If the viscosity of the ink is increased in order to prevent the colored ink from flowing out, the discharged ink is a dot, so that the overlapping of the ink dots and the smoothness of the pixel surface are insufficient. The film thickness uniformity and the dye density uniformity cannot be achieved.
- the object of the present invention is to solve problems such as complicated processes and shortening of working time in the production of CF having excellent performance in image characteristics such as pixel fineness and sharpness, and is easy and economical.
- another object of the present invention is to provide a method of manufacturing a CF that can cope with an increase in size and a reduction in size of a liquid crystal display.
- the present inventors have formed a high partition made of a positive resist that can be easily washed and removed on the BM formed on the CF substrate. Therefore, it is possible to form pixels with sufficient color density even if the holes for pixel formation are surrounded by high walls, and the ink is diluted with a solvent or water to have a low viscosity as a colored ink. In addition, it is possible to fill a sufficient amount of ink in the holes for pixel formation, and unnecessary colored film adhering to the partition wall is finally removed by washing the partition wall at the same time.
- the inventors have found that the above problems can be solved, and have completed the present invention.
- the present invention is a step of forming a resist layer by applying a photodegradable positive resist so as to cover at least the black matrix (BM) formed on the surface of the color filter (CF) substrate (step A), The step of exposing the resist layer from the back surface of the CF substrate (step B), the resist layer solubilized by the exposure is washed away, and separated by a hole wall (groove wall, partition wall) made of the resist layer remaining on the BM.
- BM black matrix
- CF color filter
- the method for producing CF is characterized by comprising a step (Step E) of solubilizing and removing the partition wall made of the resist layer by exposing the substrate.
- the CF substrate is made of glass, plastic, or a plastic film for transfer or pasting;
- the positive resist used in step A contains a water-soluble resin and / or a water-swellable resin.
- the thickness of the positive resist layer in step A is preferably 2 to 10 ⁇ m.
- the colored film is composed of three primary colors of red, green, and blue, or three primary colors of yellow, magenta, and cyan, and auxiliary colors of orange, green, and violet.
- the color ink is an organic solvent-based ink, water-based ink, solvent-free ink, energy ray-curable ink, heat-meltable solid ink, or fine powder toner ink containing a pigment and a film-forming material. It is preferable that the viscosity of the colored ink is 1 to 40 mPa ⁇ s. There.
- the color ink film-forming material is a non-reactive random, block and / or graft copolymer (hereinafter referred to as “copolymer”), a random having a reactive group, It is selected from the group consisting of a block or graft copolymer, a medium molecular weight oligomer having a reactive group, and a monomer having a reactive group and a crosslinking agent; the reactive group is a methylol group, an isocyanate group, an epoxy group It is preferably selected from the group consisting of oxetane group, vinyl group, (meth) acryloyl group, hydroxyl group, carboxyl group, amino group, imino group and reactive derivatives thereof.
- copolymer a non-reactive random, block and / or graft copolymer
- a random having a reactive group It is selected from the group consisting of a block or graft copolymer, a medium molecular weight oli
- the CF substrate is a printing film for transfer or pasting, and the CF pixels formed on these substrates are transferred or pasted onto a glass CF substrate or a plastic CF substrate.
- a CF manufacturing method is provided.
- the present invention also provides a CF produced by the method of the present invention.
- the present invention also includes a step of applying a photodegradable positive resist to form a resist layer so as to cover at least the black matrix (BM) formed on the surface of the color filter (CF) substrate (step A), The step of exposing the resist layer from the back surface of the CF substrate (step B), the resist layer solubilized by the exposure is washed away, and separated by a hole wall (groove wall, partition wall) made of the resist layer remaining on the BM.
- a method for producing a CF substrate characterized by comprising a step (step C) for forming a formed hole space or groove space (hole), and a CF substrate produced by the method.
- the present invention provides an image display device comprising the CF of the present invention.
- the three primary colors of red, green, and blue of the pixel, or the three primary colors of yellow, magenta, and cyan are “ R color, G color, B color, Y color, M color, C color, R color, G color, B color pixel or Y color, M color, C color
- pixels may be collectively referred to as “pixels”.
- known image arrangement patterns such as a stripe arrangement, a mosaic arrangement, and a triangle arrangement are available. used.
- the CF substrate glass, plastic and a plastic film for transfer or pasting are used depending on the purpose of use or usage.
- a positive resist is applied in a necessary thickness on a BM on a CF substrate in advance and exposed from the back surface (side without the BM) of the CF substrate. Then, the positive resist in the exposed portion is photodegraded except for the light-shielded BM portion, and this is washed and removed to develop a wall made of a positive resist layer having a required height on the BM portion. As a result, a gap surrounded by a wall having a required height on the BM can be easily and accurately created as a space for forming pixels.
- the space (hole) for forming the CF pixel is a hole surrounded by a high partition wall
- the colored ink filling the hole is coated with an appropriate pixel.
- the ink can be diluted with a solvent or water so that the colored ink can maintain sufficient fluidity, and necessary additives can be added.
- the solvent and water in the colored ink are removed by drying to form a colored film and cure the film.
- the partition walls that become unnecessary after the pixel formation are exposed again from the surface (BM side), washed away, and the BM returns to its original state. At this time, unnecessary colored films adhering to the partition walls are removed while the partition walls are removed.
- the manufacturing method of the CF of the present invention has a very rational manufacturing process, and the partition walls forming the pores filled with the colored ink do not use a pattern such as a photomask. It is constructed only by full exposure from the back side of the substrate and development process. Further, after the pixels are formed, the partition walls are removed by the entire exposure from the BM side (surface) and the cleaning removal. Thus, the method of the present invention is simple and simplified in process, and is very reasonable and economical. Further, the pixels obtained by using the high partition walls surrounding the holes have a uniform film thickness and a smooth surface, and therefore the dye density within and between the pixels can be made the same.
- the R, G, and B pixels of CF are simply and accurately formed in the pixel vacancies in the partition made of a positive resist. Problems such as time reduction, quality issues such as poor pixel printing resolution and positional accuracy, color mixing between pixels, surface smoothness, and uneven color density in the IJ method It was solved.
- a photodecomposition type positive resist is applied so as to cover at least BM 2 formed on the surface of the CF substrate 1, and a resist layer is formed. 3 (step A), the step 4 of exposing the resist layer 3 from the back surface of the CF substrate 1 (step B), and the resist layer 5 solubilized by the exposure 4 is removed by washing and remains on the BM 2.
- step C of forming a hole space or groove space (hole 5) separated by the hole wall 6 (groove wall, partition wall) made of the resist layer 6, and then coloring the hole 5 corresponding to the CF pixel
- step D step of forming a colored film by applying inks 7, 8, and 9
- step E step of solubilizing and removing the partition wall 6 made of the resist layer by exposure from the BM2 side
- Examples of the positive resist used in the present invention and mainly characterizing the present invention include sulfonate esters or sulfonate amides of o-aromatic quinone-2-diazide as conventionally known quinonediazide compounds.
- sulfonate esters or sulfonate amides of o-aromatic quinone-2-diazide as conventionally known quinonediazide compounds.
- phenols used for forming the sulfonate ester include phenol-formaldehyde novolak resin, o-chlorophenol-formaldehyde novolak resin, bisphenol A, trihydroxybenzophenone, tetrahydroxybenzophenone, and 2,7-dihydroxynaphthalene.
- amines used for sulfonic acid amide formation include amines such as rosin amine.
- the above-mentioned o-naphthoquinonediazides are sensitive to ultraviolet rays up to around 500 nm.
- the photodegradation mechanism when irradiated with ultraviolet rays is that the azide group of o-naphthoquinonediazide is decomposed by exposure, releases nitrogen gas, and passes through a ketene group. Convert to indenecarboxylic acid. By immersing in the developer, the exposed portion is dissolved and removed.
- An alkaline aqueous solution is used as a developer used for the development performed after the exposure, for example, trisodium phosphate, a mixed solution of trisodium phosphate and caustic soda, an inorganic alkaline aqueous solution such as sodium carbonate and sodium metasilicate, tetramethylammonium hydroxide, etc. And an organic alkaline aqueous solution.
- the physical strength of the partition formed by the positive resist is not so much needed, so a hydrophilic resin is added to the positive resist in order to improve the developability of the exposed portion with an alkaline solution.
- a hydrophilic resin include polyvinyl alcohol, ethylene-vinyl alcohol copolymer, (meth) acrylic ester- (meth) acrylic acid copolymer, styrene- (meth) acrylic acid copolymer, polypropylene glycol-polyethylene glycol.
- Water-swellable resins such as water-soluble resins such as block copolymers, and (meth) acrylic acid copolymer cross-linked products, isobutylene-maleic acid cross-linked products and polystyrene-polyacrylic acid-polystyrene ternary block copolymers
- a hydrophilic resin selected from resins is preferred.
- a BM is formed surrounding a pattern of three primary color pixels.
- the size of the pixel is determined by the design of the pixel designed according to the application of the CF, and is not particularly limited, and the pixel is designed with a conventionally used size. In general, the size of a pixel is usually 50 to 100 ⁇ m in horizontal width and 200 to 300 ⁇ m in vertical width and BM line width is 20 to 30 ⁇ m as an opening portion. Is as thin as 10 to 15 ⁇ m so that a wide opening is formed to form pixels.
- the film thickness of BM is usually 0.1 to 0.2 ⁇ m for chromium-based BM and 2 to 3 ⁇ m for black resin-based BM.
- a partition made of a positive resist is formed on the BM of the CF substrate, but the height of the partition for forming a pixel forming hole is the solid content (colored film forming component) of the colored ink. It is preferable to decide according to the content rate.
- an ultraviolet curable coloring ink hereinafter sometimes referred to as “UV ink”
- the ink has a solid content (film forming component), an addition polymerizable oligomer and an addition polymerizable monomer.
- the ink can be reduced with a small amount of addition of a dilution medium, and sufficient fluidity can be imparted to the ink without relatively reducing the solid content (colored film component). .
- the partition wall when using UV ink as the colored ink does not need to be so high.
- a thermosetting ink since the ink uses a high molecular weight polymer as a film forming component, the ink may be sufficiently diluted to reduce the viscosity of the ink. It becomes necessary and the solid content of the ink is lowered by dilution. Therefore, it is necessary to make the partition wall sufficiently high.
- the relationship between the concentration of the solid content (pixel forming property) contained in the color ink used and the height of the BM overlaid with the partition wall depends on the solid content in the colored ink (pixel formation). If the component concentration is approximately 70% by mass, the height is at least twice the film thickness, if it is approximately 50% by mass, it is at least 3 times higher, and if it is approximately 30% by mass, it is at least 4 times higher. It is preferable to use as a guide.
- the dry film thickness of the positive resist needs to be large, but the film thickness of the pixel is usually 1 to 3 ⁇ m, and the film thickness of the resist film partition is preferably about 2 to 10 ⁇ m practically. .
- pixels are formed using colored ink having good fluidity using holes formed as set on the CF substrate, printing accuracy with the colored ink is not relatively required, and coloring is performed.
- a conventionally known coloring method can be used. These methods include, for example, (A) a plateless printing method (a printing method that does not use a printing plate) in which colored ink of each color is directly injected into each pixel formation hole to form a three-color pixel or BM. And (B) a method of printing the three primary color pixels or the BM through the holes of the corresponding pixels by using the respective printing plates of the three primary color pixels or the BM.
- a conventionally known printing method for example, a printing method such as an inkjet printing method, a dispenser injection method, an electrostatic recording method, an electrophotographic method, or the like is used, and as a printing method of (B), Screen printing, thermal transfer printing, flexographic printing, gravure printing, and offset printing are used.
- Colored inks used in the above printing methods include conventionally known organic solvent-based inks, water-based inks, solvent-free inks, energy ray curable inks, heat-containing inks, including pigments and film-forming materials that are compatible with the respective printing methods.
- a meltable solid ink or a fine powder toner ink is used.
- the materials used for the colored ink used in the present invention will be described.
- the components constituting the color ink include a dye, a dye fixing agent (binder), and a silane coupling agent, a polymer dispersion aid, a dye dispersant, and a liquid medium that are added as necessary.
- a dye a pigment is particularly preferable from the viewpoint of excellent fastness such as heat resistance, light resistance and solvent resistance.
- a pigment fixing agent and a pigment dispersant are used.
- the pigments contained in the inks for R, G, and B pixels, Y, M, and C pixels and BM will be described.
- Organic pigments, dispersible dyes, oil-soluble dyes, water-soluble dyes, inorganic pigments, and the like are used as R, G, B, and Y, M, and C pixel dyes for CF.
- azo pigments such as insoluble azo, soluble azo, and high molecular weight azo, quinacridone red, quinacridone magenta, and other quinacridone pigments, anthraquinone pigments, perylene pigments, phthalocyanine blue
- Conventionally known pigments such as phthalocyanine pigments such as phthalocyanine green, isoindolinone pigments, dioxazine pigments such as dioxazine violet, complex pigments such as quinophthalone yellow pigment and nickel azo yellow can be used.
- dispersible dyes oil-soluble dyes, and water-soluble dyes
- conventionally known dyes represented by the above structures as R, G, B, Y, M, and C colors are used alone or in combination.
- Dyes are less robust than pigments depending on their chemical structure, but they have excellent optical properties such as sharpness, color tone, color transmittance, and contrast ratio. Is done.
- pigments are used as the above-mentioned pigments for forming the R, G, and B colors.
- Specific examples of typical pigments include C.I. I. Pigment Red (hereinafter referred to as PR) 9, 97, 168, 177, 216, 224, 226, 242, and 254, and C.I. I. CI pigment green (hereinafter referred to as PG) 7, 36, poly (12-16) bromophthalocyanine green, etc. as blue pigments such as C.I. I. Pigment Blue (hereinafter referred to as PB) 15: 6, 60, etc. I. Pigment Violet (hereinafter referred to as PV) 23 and the like as a yellow pigment such as C.I. I.
- Pigment yellow (hereinafter referred to as PY) 20, 24, 83, 93, 109, 110, 113, 114, 117, 125, 138, 139, 150, 154, 180, 185, etc.
- PY Pigment yellow
- Examples thereof include a coprecipitation pigment, a solid solution pigment, or a mixed crystal pigment of a pigment and a yellow pigment or a green pigment and a yellow pigment.
- pigments that form Y, M, and C colors include yellow pigments such as PY-62, 74, 93, 155, and 185, red pigments such as PR-122, 146, and PV-19, and blue pigments such as PB- 15: 3 and the like, and further, coprecipitation pigments of the above-described yellow pigment and blue pigment, red pigment and purple pigment, or blue pigment and yellow pigment, solid solution pigment, or mixed crystal pigment.
- a preferred pigment used in the present invention is a finely divided pigment.
- the powder fine pigment produced through the pigment synthesizing step and the pigmentation step or a powder pigment that can be used for the use of a colorant for ordinary paints or synthetic resins, can be used in the fine particle step of the pigment. All the pigments used in are referred to as “coarse particle pigments”.
- these coarse particle pigments are kneaded and ground in a kneader together with a water-soluble salt and a water-soluble organic solvent having a boiling point of 150 ° C.
- the average particle size of the pigment is 10 to 100 nm, preferably Aqueous filter cake of finely divided pigment obtained by filtering and washing water with a pigment grind mass obtained by refining to 10 to 80 nm, and a finely divided pigment obtained by drying and pulverizing it, and an aqueous cake with an aqueous polymer dispersion
- An aqueous pigment dispersion obtained by dispersing together with an agent or a processed pigment co-precipitated or kneaded with an easily dispersible polymer is used as a pigment for pigmented ink or a pigment processed product according to each printing method.
- Examples of the film-forming material used in the color ink include conventionally known non-reactive random copolymers, block copolymers, graft copolymers (hereinafter referred to as “copolymers”), and reactive groups.
- the reactive group is determined depending on the curing method of the colored ink, and conventionally known methylol group, isocyanate group, epoxy group, oxetane group, vinyl group, (meth) acryloyl group, hydroxyl group, carboxyl group, amino group, imino group and Examples thereof include reactive derivatives thereof.
- the film-forming polymer is a heat-drying type or heat-crosslinking type polymer, and is used in the form of a solvent solution, an aqueous solution, an emulsion, a latex, or a solid heat-meltable resin.
- the hydrophobic monomer constituting these film-forming polymers imparts film-forming properties to the polymer, and in organic solvent-type inks, acts as an amphiphilic group for organic solvents. Acts as a chromophoric group for the dye.
- hydrophobic monomers examples include (esters having 1 to 30 carbon atoms) alkyl esters and cycloalkyl (4 to 20 carbon atoms) esters of ⁇ , ⁇ -ethylenically unsaturated carboxylic acids such as acrylic acid and methacrylic acid. , Alkylcycloalkyl (6 to 20 carbon atoms) ester, ethylene, propylene, butylene, isobutylene, butadiene, isoprene, styrene, ⁇ -methylstyrene, vinyl naphthalene, and other aromatic vinyl monomers.
- Examples of the macromonomer having a hydrophobic molecular chain include macromonomers in which an ⁇ , ⁇ -ethylenically unsaturated group is bonded to the above-described monomer having a hydrophobic group or a copolymer chain.
- hydrophilic monomer constituting the film-forming polymer examples include, for example, the above-mentioned ⁇ , ⁇ -ethylenically unsaturated carboxylic acid, vinyl sulfonic acid, styrene sulfonic acid and the like as monomers having an anionic hydrophilic group; Nonionic hydrophilic group-containing monomers such as 2-hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, polyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, (meth) acrylamide, etc .; cationic Examples of the monomer having a hydrophilic group include N, N-dimethylaminomethyl (meth) acrylate, N, N-diethylaminomethyl (meth) acrylate, 4-vinylpyridine and the like, and a macromonomer having a hydrophilic molecular chain As the hydrophilic single amount shown above And
- Examples of the reactive monomer constituting the film-forming polymer include (meth) acrylic acid and maleic acid having a carboxyl group, 2-hydroxyalkyl having 2 to 6 carbon atoms (meth) acrylate having a hydroxyl group, and the like.
- Isocyanate groups such as glycidyl (meth) acrylate having an epoxy group, N-methylol (meth) acrylamide having a methylol group, N-methoxymethyl (meth) acrylamide, ⁇ -methacryloxypropyltrimethoxysilane having a silane group, etc.
- the macromonomer having a molecular chain having a group that reacts with a crosslinking agent the above-mentioned reactive monomer (co) polymer chain or reactive monomer and the above-mentioned hydrophobic monomer are co-polymerized.
- crosslinking agent examples include trimethylolpropane polyglycidyl ether having an epoxy group, pentaerythritol polyglycidyl ether, etc .; methoxymethylolated melamine having a methylol group, butoxymethylol melamine, etc .; poly (hexamethylenecarbodiimide) diisocyanate and bis having a carbodiimide group Multi-branched polycarbodiimide, which is a urethane reaction product of monomethoxypolyethylene glycol and polyoxyethylene sorbit monolaurate, etc .; trimethylolpropane-tris (tolylene diisocyanate adduct) having an isocyanate group, trimethylolpropane-tris (hexa) And methylene diisocyanate adduct).
- Examples of the polymerizable film-forming material in the ultraviolet radical curable type, the photo cationic polymerization type, the electron beam curable type, and the thermal polymerization type ink include conventionally known addition double bonds or addition double crosslinkable unsaturated double bonds or polymerizable cyclic ether groups. Monomers, oligomers and / or polymers having are used.
- addition-polymerizable oligomer and polyfunctional monomer examples include urethane acrylates such as (poly-tetramethylene glycol-hexamethylene diisocyanate polyurethane) -bisacrylate, bisphenol A epoxy resin-bisacrylate, and phenol novolac epoxy.
- urethane acrylates such as (poly-tetramethylene glycol-hexamethylene diisocyanate polyurethane) -bisacrylate, bisphenol A epoxy resin-bisacrylate, and phenol novolac epoxy.
- Resin-epoxy acrylates such as polyacrylate, poly (hexylene isophthalate) -bisacrylate, (trimethylolpropane-adipic acid polyester) -acrylic oligomers such as polyester acrylates such as polyacrylate, tetraethylene glycol diacrylate , Tripropylene glycol diacrylate, tricyclodecane dimethanol diacrylate, bisphenol A-ethylene oxide adduct Rate, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate.
- Examples of alicyclic diepoxy compounds include 3,4-epoxycyclohexylmethyl (3,4-epoxy) cyclohexanecarboxylate and limonene dioxide, and examples of oxatenic compounds include oxaten alcohol, dioxetane, phenyl oxetane, and xylylene oxetane. , 2-ethylhexyl oxetane, etc .; Examples of vinyl ether compounds include triethylene glycol divinyl ether, 1,4-cyclohexanedimethanol divinyl ether, and the like.
- a conventionally known initiator is used as the polymerization initiator.
- Preferred examples include, for example, photopolymerization initiators such as benzyl ketal, ⁇ -hydroxyalkylphenone, ⁇ -aminoalkylphenone, etc .; photocationic polymerization initiators such as triarylsulfonium salts and aryliodonium salts; sensitization Examples of the agent include 1-chloro-4-propoxythioxanthone; examples of the thermal polymerization initiator include azobisisobutyronitrile, azobiscyanoisovaleric acid, dimethyl 2,2′-azobisisobutyrate, and the like.
- the adhesion of the formed colored film to the glass substrate is improved by adding a silane coupling agent having a reactive organic functional group to the colored ink.
- a silane coupling agent having a reactive organic functional group As these compounds, conventionally known silane coupling agents are used.
- the reactive organic functional group include a silane coupling agent having an epoxy group, a thiol group, a hydroxyl group, an amino group, a ureido group, a vinyl group, an acryloyl group, and the like.
- the liquid medium used for adjusting the viscosity of the colored ink is an organic solvent in the case of oil-based colored ink, and water and a mixed solvent of water and a water-soluble organic solvent in the case of aqueous colored ink.
- organic solvent examples include alcohols having 1 to 10 carbon atoms; alkylene glycols having 2 to 6 carbon atoms, polyalkylene (carbon numbers: 2 to 6) glycols, and monoalkyl (carbon number) of these glycols. : 1-10) ethers, dialkyl (carbon number: 1-10) ethers, monoalkyl (carbon number: 1-10) ether monoacylates; organic acid (carbon number: 1-6) alkyl (carbon number) : 1 to 6) esters; ketones such as methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone; aliphatic hydrocarbon solvents such as alkane hydrocarbons (carbon number: 6 to 10), isopar, shell sol; cycloalkane (carbon Number: 6-10) and other alicyclic hydrocarbon solvents; aromatic hydrocarbon (carbon numbers: 7-10) solvent; N-methyl-2-pyrrole Down, 2-pyrrolidone, and a nitrogen-containing solvent such as 1,3
- the aqueous medium used in the water-based coloring ink is water and a mixed solvent of water and a water-soluble organic solvent, and it is preferable to use deionized water such as ion-exchanged water or distilled water. Depending on the type of water-based ink, these water-based media are used in a neutral, alkaline, or acidic state.
- water-soluble organic solvent used in the aqueous mixed solvent examples include conventionally known water-soluble organic solvents such as (carbon number: 1 to 3) alcohols, (carbon number: 2, 3) glycols, glycerin, Lower alkyl of polyhydric alcohol such as alkylene (carbon number: 2, 3) glycol alkyl (carbon number: 1 to 4) ether, polyalkylene (carbon number: 2, 3) glycol alkyl (carbon number: 1 to 4) ether Ethers: Nitrogen-containing solvents such as N-methyl-2-pyrrolidone and 2-pyrrolidone.
- water-soluble organic solvents such as (carbon number: 1 to 3) alcohols, (carbon number: 2, 3) glycols, glycerin, Lower alkyl of polyhydric alcohol such as alkylene (carbon number: 2, 3) glycol alkyl (carbon number: 1 to 4) ether, polyalkylene (carbon number: 2, 3) glycol alkyl (carbon number: 1 to 4) ether Ethers: Nitro
- the pigment used in the present invention is strictly required to have high definition, high transparency, high contrast ratio, etc. as a pigment for CF pixels.
- the pigment particle size has a molecular dispersion state. Although expected, it is practically 100 nm to 10 nm, preferably 60 nm to 10 nm, and more preferably 40 nm to 20 nm. Therefore, as described above, the pigment is finely divided in advance by, for example, a salt milling method.
- the size of the pulverizing media of the disperser is reduced, the filling rate of the pulverizing media is increased, the processing time is increased, and the discharge speed is decreased.
- Methods such as classification and separation with a filter or ultracentrifuge after pulverization are used. Or the combination of those methods is mentioned.
- CF is a method for directly forming a pixel on a glass CF substrate or a plastic CF substrate, and a transfer or pasting printing film on which a pixel is formed is transferred onto a glass CF substrate or a plastic CF substrate.
- a CF having quality superior in terms of image performance such as sharpness, transparency, and contrast can be produced at a low cost.
- a downsized and upsized image display device equipped with the CF thus obtained is provided at low cost.
- Example 1 Preparation of CF substrate having partition walls formed on metal chromium BM
- a glass substrate for CF on which a low reflection chromium-based BM was formed was prepared.
- the BM has a width of 20 ⁇ m and an opening for a pixel having a length of 280 ⁇ m and a width of 80 ⁇ m.
- the positive resist was applied to the surface of the glass substrate on which the BM was formed with a coater so that the thickness after drying was 8 ⁇ m, and was blown and dried at 50 ° C. or less.
- UV exposure was performed from the back surface of the glass substrate coated with a positive resist.
- development was performed with a 3% aqueous solution of 3% phosphoric acid, washed with water, neutralized with a 1% aqueous solution of phosphoric acid, washed with water and dried.
- the partition wall height of the positive resist layer built on the BM was 8 ⁇ m.
- a CF substrate was prepared in which the opening surrounded by the partition walls had 280 ⁇ m long and 80 ⁇ m wide holes.
- the positive resist used above consists of 4 parts of ester obtained by reacting 1,2-naphthoquinone-2-diazide-5-sulfonyl chloride with o-chlorophenol-formaldehyde resin, 2 parts of novolak resin, 2 parts of oil-soluble phenol resin A resin composition containing 2 parts of a water-swellable resin made of an acrylic acid-polystyrene macromonomer (6: 4) copolymer and 90 parts of ethylene glycol monomethyl ether in a solid content.
- Example 2 (Preparation of a CF substrate having partition walls formed on a black resin mold BM) A glass substrate for CF on which a black resin mold BM was formed was prepared.
- the thickness of the BM is approximately 2 ⁇ m, the width is 20 ⁇ m, and the openings for the pixels are 280 ⁇ m long and 80 ⁇ m wide.
- the same positive resist used in Example 1 was applied to the surface of the glass substrate on which BM was formed with a coater so that the thickness after drying was 6 ⁇ m, and the air was blown at 50 ° C. or lower. Dried.
- the glass substrate coated with a positive resist was exposed to ultraviolet light from the back surface.
- Example 3 (Production of CF by UV curable IJ printing method) (A) Refinement treatment of used pigments As the pigments used, PR254 (red pigment-1), PR177 (red pigment-2), PG36 (green pigment-1), PY139 (yellow pigment-1), PY138 (yellow pigment) -2), PY150 (yellow pigment-3), PB15: 6 (blue pigment-1) and PV23 (purple pigment-1) were prepared, and these pigments were refined using pulverized sodium chloride. In accordance with a conventional method, each pigment was charged into a kneader equipped with a pressure lid at a mass ratio of 1.7: 1.3 with crushed salt and diethylene glycol, and kneaded and ground for 7 hours.
- the obtained ground product was put into water, stirred to dissolve sodium chloride and diethylene glycol, filtered and washed with water to obtain each pigment press cake.
- the pigment content in each pigment presscake was 35-45%.
- the average particle diameter of the pigment was about 30 to 40 nm.
- aqueous color was obtained.
- the average particle size of the water-based dispersed pigments of each color was measured with a particle size measuring instrument N-4, and was about 30 to 40 nm.
- the above-mentioned aqueous color corresponds to the pigment number used in the above (a), red aqueous color-1, red aqueous color-2, green aqueous color-1, yellow aqueous color-1, yellow aqueous color. -2, yellow aqueous color-3, blue aqueous color-1, purple aqueous color-1.
- the aqueous resin pigment dispersant-1 used above is benzyl methacrylate (BzMA) -ethyl methacrylate (EMA) -2-ethylhexyl methacrylate (EHMA) -2-hydroxyethyl methacrylate (HEMA) -methacrylic acid (MA) ammonium copolymer
- BzMA benzyl methacrylate
- EMA ethyl methacrylate
- EHMA -2-ethylhexyl methacrylate
- HEMA -2-hydroxyethyl methacrylic acid
- MA ammonium copolymer
- the cationic polymer dispersant used above is a graft polymer type dispersant in which polycaprolactone is partially amide-bonded to polyethyleneimine, and the acrylated acrylic resin solution is ethyl methacrylate (EMA) -butyl methacrylate ( BMA) -styrene (St) -2-hydroxyethyl methacrylate (HEMA) copolymer, 40% MIBK-EAc mixed solvent solution of acrylic ester, polyacrylate monomer is dipentaerythritate hexaacrylate and trimethylolpropane This is a monomer mixture of triacrylate (1: 1 by weight).
- EMA ethyl methacrylate
- BMA butyl methacrylate
- St styrene
- HEMA -2-hydroxyethyl methacrylate copolymer
- MIBK-EAc mixed solvent solution of acrylic ester polyacrylate monomer is dipentaerythritate hex
- silane coupling agent 3-glycidoxypropyltrimethoxysilane was used as the silane coupling agent, and Irgacure 369 and Irgacure 184 were used in combination as the photopolymerization initiator (mass ratio: 4: 1, manufactured by Ciba).
- the partition walls are washed and removed by immersing in a 4% trisodium phosphate aqueous solution, neutralized with dilute acid, washed with water and dried to obtain a CF on which colored pixels are formed. Obtained.
- the pixel films on the CF substrate were independent of color mixing, had non-uniform color density, had a smooth surface, and displayed three-color pixels with a clear mosaic pattern.
- Example 4 (Production of CF with UV curable IJ ink)
- CF substrate having partition walls of Example 1 instead of the CF substrate having the partition walls of Example 1, a CF substrate having partition walls formed on the resin mold BM of Example 2 was used.
- CF was manufactured using R, G, and B color IJ inks prepared in (d). The pixels on the CF substrate were independent of color mixing, had no uneven color density, had a smooth surface, and exhibited a three-color pixel with a clear mosaic pattern.
- Example 5 Preparation of CF with solvent-based IJ ink
- A Preparation of R-color, G-color, and B-color solvent-based IJ inks
- each color processed pigment obtained in Example 3 (c) was treated with a cationic polymer dispersant.
- acrylic polymer-1 solution, HMMM solution, leveling agent and MIBK-EAc mixed solvent were blended, stirred for 2 hours with a dissolver, and dispersed using a horizontal medium disperser. Filtration was performed with a membrane filter having a pore size of 5 ⁇ m.
- the acrylic polymer-1 solution used above is a 40% MIBK-EAc mixture of EMA-BMA-St-HEMA copolymer (mass ratio; 35: 30: 20: 15, weight average molecular weight: about 30,000).
- the solvent solution, hexamethoxymethylmelamine (HMMM) solution is a 50% methanol solution.
- the coated film was baked and cured at 180 ° C. in a heat dryer to obtain a CF on which colored pixels were formed.
- the pixels on the CF substrate were independent of color mixing, had no uneven color density, had a smooth surface, and exhibited a three-color pixel with a clear mosaic pattern.
- a pixel pattern was similarly formed using a CF substrate on which a partition wall was formed on the resin mold BM of Example 2.
- the pixels on the CF substrate were independent of color mixing, had no uneven color density, had a smooth surface, and exhibited a three-color pixel with a clear mosaic pattern.
- the average particle size of the pigment dispersion of each color was measured with a particle size measuring instrument N-4, and was about 40 nm.
- Each ink was uniformly applied to a polyethylene terephthalate film with a bar coater and dried. Subsequently, it put into the heat dryer and the coating film was baked and hardened at 180 degreeC.
- Each color showed excellent performance in optical properties such as sharpness, color purity, optical density, transparency and contrast.
- the partition walls were washed and removed by dipping in a 4% trisodium phosphate aqueous solution, neutralized with dilute acid, washed with water, and dried to obtain a CF on which colored pixels were formed.
- the pixel films on the CF substrate were independent of color mixing, had no uneven color density, had a smooth surface, and displayed three-color pixels with a clear mosaic pattern.
- a pixel pattern was similarly formed using a CF substrate on which a partition wall was formed on the resin mold BM of Example 2.
- the pixels on the CF substrate were independent of color mixing, had no uneven color density, had a smooth surface, and exhibited a three-color pixel with a clear mosaic pattern.
- the manufacturing process is very streamlined, and a high partition made of a positive resist is formed on the BM of the CF substrate to surround the holes for pixel formation with a high wall.
- the volume of the holes can be increased, and even if a low-viscosity ink diluted with a medium is used as the colored ink, the holes for pixel formation can be filled in a sufficient amount to form pixels with sufficient color density.
- the unnecessary partition walls are photolyzed, washed and removed, and the BM returns to its original state.
- the obtained pixels have a uniform film thickness, a smooth surface, and a uniform dye density.
- problems such as complexity of conventional processes, shortening of work time, pixel printing resolution and low position accuracy of printing methods, IJ method pixels Quality issues such as color mixing between surfaces, surface smoothness and color density non-uniformity are solved, and CF with excellent quality can be easily and economically achieved through a simplified process, and the size of the liquid crystal display can be increased.
- it is possible to provide a method of manufacturing a CF that can cope with downsizing.
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Abstract
Description
本発明のCFの製造方法は、図1~図6に示すように、まず、CF基板1の表面に形成されたBM2を少なくとも覆うように、光分解型のポジ型レジストを塗布してレジスト層3を形成する工程(工程A)、CF基板1の裏面から上記レジスト層3を露光4する工程(工程B)、露光4により可溶化したレジスト層5を洗浄除去して上記BM2上に残存したレジスト層6からなる孔壁6(溝壁、隔壁)によって隔てられた孔空間あるいは溝空間(空孔5)を形成する工程(工程C)、次いで上記空孔5にCFの画素に対応する着色インク7、8、9を付与して着色膜を形成する工程(工程D)、BM2側から露光して上記レジスト層からなる隔壁6を可溶化して除去する工程(工程E)からなることを特徴としている。
実施例1(金属クロムBM上に隔壁を形成したCF用基板の調製)
低反射クロム系BMを形成したCF用ガラス基板を準備した。BMは、幅が20μmで画素のための開口部が、縦280μm、横80μmである。ガラス基板のBMが形成されている表面に、ポジ型レジストを乾燥後の厚みが8μmになるようにコーターで塗布し、50℃以下で送風乾燥した。
黒色樹脂型BMを形成したCF用ガラス基板を準備した。BMの厚みは凡そ2μm、幅が20μmで、画素のための開口部が、縦280μm、横80μmである。実施例1と同様にガラス基板のBMが形成されている表面に実施例1で使用したと同じポジ型レジストを、乾燥後の厚みが6μmになるようにコーターで塗布し、50℃以下で送風乾燥した。ポジ型レジストを塗布したガラス基板の裏面から紫外線露光した。次いで3%燐酸第3ソーダ水溶液で現像を行い、水洗後、燐酸の1%水溶液で中和し、水洗、乾燥を行なった。BMの上に構築されたポジ型レジスト層による隔壁の高さはBMも含め8μmであり、これらの隔壁により形成された空孔を有するCF基板を調製した。
(a)使用顔料の微細化処理
使用する顔料として、PR254(赤色顔料-1)、PR177(赤色顔料-2)、PG36(緑色顔料-1)、PY139(黄色顔料-1)、PY138(黄色顔料-2)、PY150(黄色顔料-3)、PB15:6(青色顔料-1)およびPV23(紫色顔料-1)を準備し、これらの顔料を粉砕食塩を用いて微細化処理を行なった。常法に従い、夫々の顔料を粉砕食塩、ジエチレングリコールと1.7:1.3の質量対比で、加圧蓋を装着したニーダーに仕込み、7時間混練、摩砕した。得られた摩砕物を水中に投入し、撹拌して食塩およびジエチレングリコールを溶解させ、ろ過および水洗をして、夫々の顔料プレスケーキを得た。各顔料プレスケーキ中の顔料分は35~45%であった。また、顔料の平均粒子径は凡そ30~40nmであった。
上記(a)で得られた赤色顔料-1、赤色顔料-2、緑色顔料-1、黄色顔料-1、黄色顔料-2、黄色顔料-3、青色顔料-1および紫色顔料-1の顔料プレスケーキを、顔料純分で30部を採り、下記に示す水性樹脂顔料分散剤-1をそれぞれ18部加えた。各顔料プレスケーキの水分にイオン交換水を追加して合計100部とした。ディゾルバーで2時間攪拌して、顔料の塊がなくなったことを確認後、横型媒体分散機「ダイノミル1.4リットルECM型」(シンマルエンタープライゼス社製)で分散処理を行って、それぞれ各色の水性カラーを得た。この各色の水性カラーの分散顔料の平均粒子径を粒度測定機器N-4で測定したところ、凡そ30~40nmであった。以下、上記の水性カラーは、上記(a)で使用した顔料の番号に対応させて、赤色水性カラー-1、赤色水性カラー-2、緑色水性カラー-1、黄色水性カラー-1、黄色水性カラー-2、黄色水性カラー-3、青色水性カラー-1、紫色水性カラー-1と称する。
上記(b)で得られた赤色2色、緑色、黄色3色、青色、紫色の8色の水性カラーをそれぞれ95部を取り、そこへ各色の顔料シナジストを1.5部、上記(b)で使用した水性樹脂顔料分散剤-1をさらに22.9部を追加して添加し、充分攪拌し、混合した。次いでそれぞれの水性カラーに攪拌しながら10%希酢酸水溶液を徐々に滴下して添加し、顔料を含む着色樹脂状物を沈殿させた。沈殿物をろ過し、充分水洗した後、乾燥し、粉砕した。それぞれ顔料分を60%含有する粉体の加工顔料が得られた。上記で使用された顔料シナジストはそれぞれの用いられた顔料の構造に1分子当りスルホン基を0.2~0.5個導入したアニオン性の顔料シナジストである。
下記の表1に記載の配合部数に従い、上記(c)で得られた各色の加工顔料をカチオン性重合体分散剤、アクリル化アクリル樹脂溶液およびメチルイソブチルケトン(MIBK)-酢酸エチル(EAc)(質量比;3:2)混合溶媒を配合し、ディゾルバーで2時間攪拌して、加工顔料の塊がなくなったことを確認後、横型媒体分散機を使用し、分散処理を行った。ポアサイズ5μmのメンブランフィルターでろ過を行なった。使用前に配合表に従い、分散液にポリアクリレートモノマー、HMMM、光重合開始剤、シランカップリング剤を添加し、充分に混合し、R色、G色およびB色の溶剤系IJインクを調製した。この各色の顔料分散液の平均粒子径を粒度測定機器N-4で測定したところ、凡そ40nmであった。夫々のインクをポリエチレンテレフタレートフィルムにバーコーターで均一に塗布し、乾燥した。紫外線照射して紫外線硬化性インク塗膜を硬化させた。各色とも鮮明性、色純度、光学濃度、透過性およびコントラスト性などの光学特性に優れた性能を示した。
R色、G色、B色の3原色画素を印刷するため、ピエゾ方式IJプリンターを準備し、上記(d)で調製されたR色、G色、B色のIJインクを充填したカートリッジを装填した。実施例1で調製された金属クロムBMの上に隔壁を形成したCF基板を用いて、基板の画素形成用空孔に、IJプリンターヘッドよりR色、G色、B色の各色インクを吐出し、充填した。各色をプリントした後、乾燥し、次いで、CF基板の表面を紫外線露光し、紫外線硬化性着色膜を硬化させるとともに隔壁を光分解させた。ポジ型レジストの洗浄、除去の常法に従い、4%燐酸三ナトリウム水溶液に浸漬して隔壁を洗浄、除去し、希酸で中和し、水洗、乾燥して、着色画素が形成されたCFを得た。CF基板上の画素膜は、それぞれ独立して混色はなく、色濃度の不均一さもなく、表面は平滑であり、鮮明なモザイクパターンの3色画素を示した。
実施例3の紫外線硬化性IJ印刷方式によるCFの製造において、実施例1の隔壁を形成したCF基板に代えて、実施例2の樹脂型BMの上に隔壁を形成したCF基板を用いて、実施例3(e)と同様にして同(d)で調製されたR色、G色、B色のIJインクを使用してCFを製造した。CF基板上の画素はそれぞれ独立して混色はなく、色濃度の不均一さもなく、表面は平滑であり、鮮明なモザイクパターンの3色画素を示した。
(a)R色、G色およびB色の溶剤系IJインクの調製
下記の表2に記載の配合部数に従い、実施例3(c)で得られた各色の加工顔料をカチオン性重合体分散剤、アクリル系重合体-1溶液、HMMM溶液、レベリング剤およびMIBK-EAc混合溶媒を配合し、ディゾルバーで2時間攪拌し、横型媒体分散機を使用し、分散処理を行った。ポアサイズ5μmのメンブランフィルターでろ過を行なった。使用前にシランカップリング剤を添加し、充分に混合し、R色、G色およびB色の溶剤系IJインクを調製した。この各色の顔料分散液の平均粒子径を粒度測定機器N-4で測定したところ、凡そ40nmであった。夫々のインクをポリエチレンテレフタレートフィルムにバーコーターで均一に塗布し、乾燥した。各色とも鮮明性、色純度、光学濃度、透過性およびコントラスト性などの光学特性に優れた性能を示した。
上記で使用したアクリル系重合体-1溶液は、EMA-BMA-St-HEMA共重合体(質量比;35:30:20:15、重量平均分子量:約3万)の40%MIBK-EAc混合溶媒溶液、ヘキサメトキシメチルメラミン(HMMM)溶液は50%メタノール溶液である。
ピエゾ方式IJプリンターに上記(a)で調製されたR色、G色、B色のIJインクを充填したカートリッジを装填した。実施例1で調製された隔壁を形成したCF基板を準備し、基板の画素形成用空孔にIJプリンターヘッドよりR色、G色、B色の各色インクを吐出し、充填した。各色をプリントした後、乾燥した。次いで、CF基板の表面を紫外線露光し、隔壁を光分解した。4%燐酸三ナトリウム水溶液に浸漬して隔壁を洗浄、除去し、希酸で中和し、水洗した。加熱乾燥機に入れ、塗膜は180℃にて焼付け、硬化して、着色画素が形成されたCFを得た。CF基板上の画素はそれぞれ独立して混色はなく、色濃度の不均一さもなく、表面は平滑であり、鮮明なモザイクパターンの3色画素を示した。
(a)R色、G色およびB色の水性IJインクの調製
下記の表3に記載の配合部数に従い、実施例3(b)で得られた各色の水性カラーをアクリル系重合体-2溶液およびイオン交換水を配合し横型媒体分散機を使用し、分散処理を行った。HMMMなどの添加剤を加え、撹拌して均一に混合し、ポアサイズ5μmのメンブランフィルターでろ過を行い、R色、G色およびB色の水性IJインクを調製した。この各色の顔料分散液の平均粒子径を粒度測定機器N-4で測定したところ、凡そ40nmであった。夫々のインクをポリエチレンテレフタレートフィルムにバーコーターで均一に塗布し、乾燥した。次いで加熱乾燥機に入れ、塗膜は180℃にて焼付け、硬化させた。各色とも鮮明性、色純度、光学濃度、透過性およびコントラスト性などの光学特性に優れた性能を示した。
実施例3(e)と同様にして、ピエゾ方式3色IJプリンターに上記(a)で調製されたR色、G色、B色の水性IJインクを充填したカートリッジを装填した。実施例1で調製された隔壁を形成したCF基板を準備し、基板の画素形成用空孔にIJプリンターヘッドよりR色、G色、B色の各色インクを吐出し、充填した。各色がプリントされて後、乾燥をし、次いで、CF基板の表面を紫外線照射し隔壁を光分解させた。4%燐酸三ナトリウム水溶液に浸漬して隔壁を洗浄、除去し、希酸で中和し、水洗し、乾燥して、着色画素が形成されたCFを得た。CF基板上の画素膜はそれぞれ独立して混色はなく、色濃度の不均一さもなく、表面は平滑であり、鮮明なモザイクパターンの3色画素を示した。
2:BM
3:ポジ型レジスト
4:露光
5:空孔
6:隔壁
7:着色インク層
8:着色インク層
9:着色インク層
10:露光
Claims (18)
- カラーフィルター(CF)基板表面に形成されたブラックマトリックス(BM)を少なくとも覆うように、光分解型のポジ型レジストを塗布してレジスト層を形成する工程(工程A)、CF基板の裏面から上記レジスト層を露光する工程(工程B)、露光により可溶化したレジスト層を洗浄除去して、上記BM上に残存したレジスト層からなる孔壁(溝壁、隔壁)によって隔てられた孔空間あるいは溝空間(空孔)を形成する工程(工程C)、次いで上記空孔にCFの画素に対応する着色インクを付与して着色膜を形成する工程(工程D)、BM側から露光して上記レジスト層からなる隔壁を可溶化して除去する工程(工程E)からなることを特徴とするCFの製造方法。
- CF基板が、ガラス製、プラスチック製または転写用あるいは貼付け用プラスチックフィルムである請求項1に記載のCFの製造方法。
- 工程Aに使用するポジ型レジストが、水溶性樹脂および/または水膨潤性樹脂を含有する請求項1に記載のCFの製造方法。
- 工程Aのポジ型レジスト層厚が、2~10μmである請求項1に記載のCFの製造方法。
- 着色膜が、レッド色、グリーン色およびブルー色の3原色、またはイエロー色、マゼンタ色およびシアン色の3原色、さらにオレンジ色、グリーン色、バイオレット色の補助色からなる群から選ばれる請求項1に記載のCFの製造方法。
- 着色膜の形成方法が、インクジェットプリンティング方式、ディスペンサー注入方式、静電記録方式、電子写真方式、スクリーン印刷方式、熱転写印刷方式、フレキソ印刷方式、グラビア印刷方式およびオフセット印刷方式から選ばれる請求項1に記載のCFの製造方法。
- 着色インクが、顔料および皮膜形成性材料を含む、有機溶剤系インク、水性インク、無溶剤系インク、エネルギー線硬化性インク、熱溶融性固体状インクあるいは微粉体状トナーインクである請求項1に記載のCFの製造方法。
- 着色インクの粘度が、1~40mPa・sである請求項1に記載のCFの製造方法。
- 着色インクの顔料が、C.I.ピグメントレッド9、97、168、177、216、224、226、242、254;C.I.ピグメントグリーン7、36;C.I.ピグメントブルー15:6、160;C.I.ピグメントバイオレット23;C.I.ピグメントイエロー20、24、83、93、109、110、113、114、117、125、138、139、150、154、180、185;上記赤色顔料と黄色顔料との、あるいは緑色顔料と黄色顔料との共沈顔料、固溶体顔料あるいは混晶顔料;C.I.ピグメントイエロー62、74、93、155、185;C.I.ピグメントレッド122、146;C.I.ピグメントバイオレット19;C.I.ピグメントブルー15:3;上記黄色顔料と青色顔料との、赤色顔料と紫色顔料とのあるいは青色顔料と黄色顔料との共沈顔料、固溶体顔料あるいは混晶顔料である請求項1に記載のCFの製造方法。
- 着色インクの中の分散された顔料の平均粒子径が、10~100nmである請求項1に記載のCFの製造方法。
- 着色インクの皮膜形成性材料が、非反応性のランダム、ブロックおよび/またはグラフト共重合体(以下、「共重合体」と称する)、反応性基を有するランダム、ブロックまたはグラフト共重合体、反応性基を有する中分子量のオリゴマー、および反応性基を有する単量体および架橋剤からなる群から選ばれる請求項7に記載のCFの製造方法。
- 反応性基が、メチロール基、イソシアネート基、エポキシ基、オキセタン基、ビニル基、(メタ)アクリロイル基、水酸基、カルボキシル基、アミノ基、イミノ基およびそれらの反応性誘導体からなる群から選ばれる請求項11に記載のCFの製造方法。
- 請求項1におけるCF基板が、転写用または貼付け用印刷フィルムであり、これらの基板に形成されたCF画素を、ガラス製CF基板あるいはプラスチック製CF基板上に転写または貼付けることを特徴とするCFの製造方法。
- 請求項13に記載の方法で製造されたことを特徴とするCF。
- 請求項1~12の何れか1項に記載の方法で製造されたことを特徴とするCF。
- カラーフィルター(CF)基板表面に形成されたブラックマトリックス(BM)を少なくとも覆うように、光分解型のポジ型レジストを塗布してレジスト層を形成する工程(工程A)、CF基板の裏面から上記レジスト層を露光する工程(工程B)、露光により可溶化したレジスト層を洗浄除去して、上記BM上に残存したレジスト層からなる孔壁(溝壁、隔壁)によって隔てられた孔空間あるいは溝空間(空孔)を形成する工程(工程C)からなることを特徴とするCF基板の製造方法。
- 請求項16に記載の方法で製造されたことを特徴とするCF基板。
- 請求項14または15に記載のCFを装備していることを特徴とする画像表示装置。
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