JP2000009922A - Production of color filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a producing method of a color filter by which selections for a coating method are increased, the production stability is improved, the line speed of the production process is increased, and the cost can be decreased. SOLUTION: A transfer body 15 prepared by forming an IR absorbing layer 13 and a delayed tack adhesive agent layer 14 on a transparent substrate 10 is irradiated with heat rays according to the image to be formed. A transfer foil prepared by forming a color transfer layer containing at least a coloring agent and a binder resin on a supporting body is tightly adhered to the delayed tack adhesive agent layer 14, the layer and the transfer foil is peeled from the layer 14 to transfer the color pattern. Then an adhesive 29 is applied on the pattern, to which a transfer foil 30 having an overcoat transfer layer 32 medium on a supporting body 31 is adhered. After peeling the foil, the pattern is heated to calcine the resin component.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a color filter which is provided in various display devices such as a plasma display and a liquid crystal display, and a solid-state image sensor, and is used for reducing reflectance, combining colors, or separating colors.

[0002]

2. Description of the Related Art For example, in a color liquid crystal display,
A color filter for performing color display is required.
For this reason, as described in a known document (for example, Tani et al., Technical Report of the Institute of Television Engineers of Japan, IDY94-112 (1
994)), and color filters prepared by a method such as a dyeing method or a pigment dispersion method are used. This is to color a resin layer using an organic dye or an organic pigment to form a color filter. In plasma displays,
It has been proposed to use a color filter to improve the contrast when displaying an image (Wani, Nikkei Electronics, November 8, 1993, No. 59).
4) pp. 215). As described above, in some display devices, a color filter is indispensable for improving color display and image quality.

[0003] In the case of a plasma display,
The fabrication process includes a process of firing at about 600 ° C. If a color filter for a liquid crystal display is used as a color filter for a plasma display, a reaction such as combustion or decomposition occurs in a plasma display manufacturing process because an organic material is contained in a material constituting the color filter. Characteristics cannot be obtained.

As a solution to this problem, it has been proposed to use a dispersion of an inorganic pigment in a low-melting glass as a color filter (Sakai et al., Technical Report of the Institute of Television Engineers of Japan ED993 IPD113-8 (198).
6) etc.). This is a method in which a paste obtained by kneading a low-melting glass and an inorganic pigment with an appropriate binder resin and a solvent is patterned on a predetermined substrate by a method such as screen printing, and then the binder resin and the solvent are removed by firing. And a filter in which an inorganic pigment is dispersed in low-melting glass. In this case, since all of the color filters are made of an inorganic material, the color filters can withstand a high-temperature process involved in manufacturing a plasma display.

[0005]

However, according to the above method, as shown in FIG.
Since the low-melting glass 11 containing the pigment 12 is formed only at a predetermined position, the thickness of the low-melting glass 11 is different between the portion where the low-melting glass 11 is formed and the portion where the low-melting glass 11 is not formed. Unevenness will occur by the minute. The depth H of the unevenness may reach about 10 μm, and the unevenness may cause disconnection of an electrode formed thereon or pinhole of a dielectric.

Japanese Patent Application Laid-Open No. 8-220340 proposes a method in which a pixel pattern is first formed on a substrate, and then an overcoat layer is formed on the entire front surface of the substrate to minimize unevenness on the substrate. Have been. In this method, a color filter having a flat substrate surface is obtained by applying an overcoat layer to the entire substrate from above the pixel pattern and then performing leveling. In this case, since the flatness of the surface of the color filter is improved, it is possible to suppress the occurrence of a problem such as disconnection of the electrode in a subsequent step of forming an electrode or a dielectric on the color filter.

However, in this method, the method of applying the overcoat layer on the substrate is limited to screen printing or the like. For this reason, the composition range such as the viscosity characteristics of the coating ink, the pigment content and the solid content ratio is limited by the printing method, and the dispersibility of the pigment in the colorant ink and the low-melting glass in the overcoat medium is reduced. It was difficult to make a good ink.

The present invention has been made to solve such a problem, and provides a method for manufacturing a color filter.

[0009]

Means for Solving the Problems The present inventor (1) eliminates the need to apply ink directly on a substrate by using the transfer method, and eliminates the limitation of the coating method. The flexibility of the composition range of the coating ink is increased due to the increase in the options of the processing method, and (3) the winding method can be selected by making the intermediate transfer medium base material such as a film. It has been found that the production speed can be improved and the cost can be reduced, and the present invention has been completed.

That is, the present invention comprises the following steps: a heat ray exposure step of irradiating a heat receiving member having at least an infrared absorbing layer and a delayed tack adhesive layer on a transparent substrate with a heat ray of an image shape to be formed; Thereafter, an adhesion step of bringing the delayed tack pressure-sensitive adhesive layer into contact with a color transfer of a transfer foil having a structure in which a color transfer layer containing at least a colorant and a binder resin is provided on a support, A peeling step of peeling the transfer foil from the delayed tack adhesive layer after the step, a transfer step of transferring and forming a colored pattern of a predetermined shape of a plurality of colors by repeating a series of these steps a plurality of times using transfer foils of different colors. After the transfer step, an application step of applying an adhesive on the colored pattern, after the application step, an adhesive layer on the transparent substrate, and an overcoat medium on a support A contacting step of bringing the transfer layer of the provided transfer foil into close contact with the transfer layer, a peeling step of transferring the overcoat medium over the entire surface of the substrate by peeling the transfer foil from the transparent substrate after the contacting step, and A method for producing a color filter, comprising at least a step of heating a substrate to bake a resin component.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. As shown in FIG. 2, the transfer object 15 of the present invention includes a transparent substrate 10, an infrared absorbing layer 13 and a delayed tack adhesive layer 14 sequentially provided on the transparent substrate 10. .

As the transparent substrate 10, those used for general color filters can be applied, and examples thereof include a glass plate containing soda lime glass, borosilicate glass and the like.

The infrared absorbing layer 13 is made of a semiconductor laser or Y
By absorbing infrared light generated by an AG laser or the like and converting it into heat, the delayed tack adhesive layer 1 described later is used.
4 is heated. The infrared absorbing layer is formed by applying and drying a composition comprising an infrared absorbing agent and a resin.

Examples of the infrared absorber include known carbon blacks, phthalocyanine-based, azo-based, thioamide-based organic metal complexes, and diimmonium-based, anthraquinone-based, polymethine-based, azulenium-based, squarylium-based, and thiopyrylium-based organic metal complexes. Compounds can be mentioned. These can be used alone or in combination of two or more.

As the thermoplastic resin or the thermosetting resin for dissolving and mixing the infrared absorbing agent, for example, epoxy resin, acetate resin, melamine resin, benzoguanamine resin, diallyl phthalate resin, polyamide resin, polyimide resin and the like can be used. It is possible. From these resins, those having good compatibility with the infrared absorbing dye to be used may be selected and used.

In the present invention, the amount of the infrared absorbing agent contained in the infrared absorbing layer is preferably from 0.01 to 50% by weight, more preferably from about 0.1 to 30% by weight. Although it can be obtained, it may be determined in consideration of the thickness of the infrared absorption layer, the intensity of laser light, the heat conversion ability, and the like.

The delayed tack pressure-sensitive adhesive layer 14 has a property that generates an adhesive force having an appropriate strength by heating, but does not generate an adhesive force in an unheated state, or has a property that the adhesive force is very small even if it is generated. . Delayed tack adhesive layer, for example, as an aqueous emulsion or an organic solvent solution,
What is constituted as a mixture of a binder resin, a solid plasticizer and a tackifier is applied.

Here, the binder resin is selected from those which are solid at room temperature and have the properties of a thermoplastic resin, and which have a glass transition temperature suitable for the heat-sensitive temperature set as a delayed tack adhesive. And acts as a component that imparts adhesive strength. Examples include polyacrylate, polyvinyl acetate, polyacrylate-vinyl acetate, polystyrene-acrylate, polystyrene-butadiene, polyethylene-vinyl acetate, polyvinyl chloride, polyethylene-vinyl chloride, polyethylene-acrylate. , Polyethylene-acrylic acid, polybutadiene,
Polyurethane, natural rubber, synthetic rubber, or the like is used alone or as a mixture.

A solid plasticizer is a solid plasticizer which is solid at normal temperature but melts when heated to a temperature higher than the melting point inherent to the material, and acts to generate tackiness by swelling and dissolving the binder resin and the tackifier. It is. As examples, phthalates, benzoates, and sulfonamides are mainly used. Examples include diphenyl phthalate, diethylhexyl phthalate, dihydroabiethyl phthalate, dimethyl isophthalate, sucrose benzoate, ethylene glycol dibenzoate, glyceride tribenzoate, pentaerythritol tetrabenzoate, sucrose octaacetate, citrate Tricyclohexyl acid, N-cyclohexyl-p-trisulfonamide and the like.

The tackifier is a component which is activated by heating to increase the tackiness of a delayed tack adhesive which has developed tackiness. Examples thereof include terpene resins such as terpene resins and terpene phenol resins. resin,
Rosin resins such as rosin and rosin derivatives, aliphatic petroleum resins, petroleum resins such as aromatic petroleum resins and oil ring petroleum resins, phenolic resins, terpene-phenolic resins, xylene resins and the like Can be

It is indispensable to adjust the composition of each component and the mixing ratio of the above-mentioned delayed tack adhesive so as to be compatible with the characteristics of the transfer foil, in order to attain the image characteristics required for producing a color filter. In addition, it is necessary to determine the composition and ratio of each of the above-described components so as to satisfy resistance to a color filter forming process such as heating and durability characteristics as a color filter.

As a result of studying the above problems, the ratio of the binder resin, the solid plasticizer, and the tackifier was 20 to 5:20.
It is desirable to set it in the range of 10 to 10 to 3 (parts by weight). If necessary, a dispersing aid, an antifoaming agent, a thickener, and the like may be added.

It is also possible to use a hot-melt adhesive which is a thermoplastic polymer and does not contain any solvent or water.

The hot melt adhesive comprises a resin component, a wax, a plasticizer, a tackifier, an antioxidant, a stabilizer and the like. As the resin component, polyethylene, polyamide, polyvinyl butyral, polyvinyl acetate, ethylene-vinyl acetate copolymer, and the like, as waxes, petroleum-based and plant-based waxes, and as a plasticizer, diphenyl phthalate And phthalic acid esters such as dihexyl phthalate and dicyclohexyl phthalate, phosphoric acid esters, paraffin chloride, petroleum plasticizers and the like.

Examples of the tackifier include butyral resin, polyisobutylene, acrylonitrile resin and petroleum resin. Examples of the antioxidant include dilauryl thiodipropionate, p-octylphenol, sodium benzoate, calcium stearate and the like. , And as a filler,
Examples include talc, clay, calcium carbonate, barium carbonate, baryta and the like.

Next, in order to form a color filter on the transparent substrate 10, as shown in FIG. 3, a heat ray is irradiated from above or below onto a pattern according to a stripe-like or mosaic-like image shape to be formed. As described above, the laser beam oscillation and the light beam scanning position by the scanner are coordinated to perform infrared laser beam irradiation scanning, and the infrared absorbing layer 13 generates heat according to the image shape, so that the delayed tack adhesive layer 14 has the image shape according to the image shape. Thus, an adhesive portion 16 having an adhesive force and a non-adhesive portion 17 which is a non-heated portion are formed.

Next, as shown in FIG. 4, the transfer foil 25 having the colored transfer layer 21 provided on the support 22 and the transferred body 15 are brought into close contact with the delayed tack adhesive layer 14 and the colored transfer layer 21. As shown in FIG. 5, the support 22 and the transfer-receiving body 15 are peeled off (peeling-off step), so as to correspond to the non-adhesive portion 17 of the delayed tack adhesive layer 14 as shown in FIG. Since the portion 23 of the colored transfer layer 21 is peeled off while being attached to the support 22, it is not transferred to the delayed tack adhesive layer 14, and the portion 24 of the colored transfer layer 21 corresponding to the adhesive portion 16 is peeled from the support 22. This is transferred to the delayed tack adhesive layer 14.

By the above operation, the adhesive portion 16 is generated according to the stripe or mosaic image to be formed, so that one color of the color filter is formed on the transparent substrate 10 by the portion 24 transferred from the colored transfer layer 21. Is formed.

The transfer foil 25 used here is formed by forming a colored transfer layer 21 containing at least a colorant and a binder resin on a support 22.

As the support 22, a resin film, a resin sheet, or the like having appropriate flexibility and having an adhesive force to the colored transfer layer 21 is used. As the resin, for example, polyester, vinyl chloride, polycarbonate, polyethylene,
It is possible to use those widely used as films and sheets, such as polypropylene, polyamide, polystyrene, and ethylene-vinyl acetate copolymer. The thickness of the support is preferably from 10 to 100 μm,
Particularly desirable is about 20 to 75 μm.

The color transfer layer 21 includes a colorant such as a pigment,
It is composed of a binder resin as a dispersion medium and satisfies the required characteristics of color filters, such as smoothness, heat resistance, light resistance, and other durability and optical characteristics. Tack adhesive layer 14 and support 22
It is configured with a composition that satisfies an appropriate adhesion force to the toner and a necessary breaking force characteristic in the colored transfer layer.

That is, the adhesive force between the support 22 of the transfer foil 25 and the colored transfer layer 21 is F1, and the adhesive force between the colored transfer layer 21 and the non-adhesive portion 17 of the delayed tack adhesive layer 14 is F1.
2. Assuming that the adhesion between the colored transfer layer 21 and the adhesive portion 16 of the delayed tack adhesive layer 14 is F2 ′, and the breaking strength of the colored transfer layer 18 is F3, the following relationship must be satisfied. F2 <F2 + F3 <F1 <F1 + F3 <F2 ′

A specific example will be described. As the colorant of each color, a pigment is mainly applied, and among them, an inorganic pigment is preferable. As the inorganic pigment, for example, a red pigment is Fe ₂ O ₃ , and a green pigment is TiO ₂ —CoO.
_{-NiO-ZnO, CoO-Al 2} O as a blue pigment
_{Although 3 and the} like can be used, the present invention is not limited to these. Further, pigments of other colors may be used depending on the application.

Examples of the binder resin include acrylic resins and acrylic copolymers, styrene resins and styrene copolymers, cellulose derivatives, rosin ester resins, polyvinyl acetate resins, vinyl chloride resins, vinyl chloride acetate. One or more resins such as vinyl copolymer, coumarone resin, vinyl ketone resin, butyral resin, polyurethane resin, polyester resin, and gum arabic can be used.

The colored transfer layer can be formed on a support by a gravure coater, gravure offset coater, gravure reverse coater, bar coater, lip coater, knife coater, or the like.

The thickness of the colored transfer layer is preferably from 0.1 to 30 μm, particularly preferably from 0.1 to 10 μm, from the viewpoint of transfer characteristics, optical characteristics and coating characteristics. In order to enhance the releasability between the colored transfer layer of the transfer foil and the support, a release layer may be interposed between the support and the colored transfer layer. As the resin used for the release layer, one or more kinds of cellulose derivatives such as alkyd resin, vinyl resin, phenol resin, epoxy resin, acrylic resin, urethane resin, polyether resin, butyral resin, silicon resin, and nitrocellulose Mixtures.

By repeating such a series of steps using transfer foils of three colors, red, green and blue, an infrared absorbing layer, a delayed tack adhesive layer, and a colored pattern as a color filter are formed. To be transferred 1 on which is laminated
5 can be manufactured.

Subsequently, as shown in FIG.
The adhesive layer 29 is applied on the coloring pattern provided on the zero. As a coating method, a method such as screen printing or an α coater can be used, but other printing methods may be used.

The adhesive layer is not particularly limited as long as it has good adhesiveness with the overcoat layer of the transfer foil.
Some examples are polyacrylate, polyvinyl acetate, polyacrylate-vinyl acetate, polystyrene-acrylate, polystyrene-butadiene, polyethylene-vinyl acetate, polyvinyl chloride, polyethylene-vinyl chloride, polyethylene. -Acrylic acid esters, polyethylene-acrylic acid, epoxy resins, melamine resins, diallyl phthalate resins, polyamide resins and polyimide resins.

Subsequently, as shown in FIG. 7, a transfer foil 30 having an overcoat layer 32 provided on a support 31 is provided.
And the substrate are overlapped so that the adhesive layer 29 and the overcoat layer 32 are in close contact (adhesion step), and then, as shown in FIG. 8, the support 31 and the substrate 10 are separated (separation step). Then, the overcoat layer 32 is transferred onto the adhesive layer 29.

As the overcoat material constituting the overcoat layer 32, a transparent material is applied, and a low melting point glass, an inorganic oxide or a sol-gel compound is preferable. Lead borosilicate glass or the like can be used as the low-melting glass. Further, as the transparent inorganic oxide, SiO ₂ ,
A composite oxide of SiO ₂ and TiO ₂ or the like can be used. The material is not limited to the above overcoat material, and a material satisfying necessary characteristics can be used. The overcoat medium needs to be removed by firing, and for example, an organic binder such as ethyl cellulose or an acrylic resin is applied.

The overcoat layer 32 is composed of one or two or more layers. As shown in FIG. 8, this overcoat is formed not only on the upper part of the colored pattern but also between the colored patterns, and the upper surface is made flat.

The overcoat layer containing at least a low-melting glass or an inorganic oxide protects the colored pattern from a post-process such as fixation of the colored pattern to the substrate surface, flattening of irregularities on the upper surface of the substrate, and etching. Has a role.

Subsequently, as shown in FIG.
Then, the resin component in each component is baked and removed, and at the same time, the low-melting glass or the inorganic oxide in the overcoat layer is melted. The heating temperature needs to be in a range below the softening temperature of the transparent substrate 10 and above the melting temperature of the low melting point glass or the inorganic oxide.

In the color filter as described above, since the upper surface of the overcoat layer covering the colored pattern is formed flat, there is no unevenness on the upper portion, and the disconnection of the electrode formed thereon is suppressed. can do. In addition, since it is composed of a plurality of layers, the pinhole in the overcoat does not penetrate to the coloring material portion, and the coloring pattern can be prevented from being destroyed in a later step.

[0046]

EXAMPLES The present invention will be described below with reference to examples.
The present invention is not to be construed as being limited thereto. In the following description, a blue color material portion will be described as a color material portion. However, the color material portion is not necessarily required to be blue, and a color filter usually has three colors (blue and red). ,
(Green) color material portions are respectively arranged at predetermined positions.

Example 1 The following composition was applied to a cleaned glass substrate having a thickness of 1 mm using an applicator.
It was dried at 0 ° C. to form an adhesive layer, and a transfer-receiving body was prepared. After drying, the film thickness was about 5 μm.

(Infrared absorbing layer composition) 10 parts by weight of polyester resin (manufactured by Toyobo Co .: Byron # 2000) 0.1 part by weight of isocyanate (Duranate 24A100 manufactured by Asahi Kasei Corporation) Infrared absorbing dye (manufactured by Nippon Kayaku: CY-9) 0.2 parts by weight ・ Toluene 45 parts by weight ・ 2-butanone 45 parts by weight

(Delayed tack adhesive layer) 50 parts by weight of dicyclohexyl phthalate 3 parts by weight of polyvinyl alcohol 3 parts by weight of nonionic activator 44 parts by weight of water

The transfer foil for a colored pattern was prepared by dispersing a coating solution having the following composition on the surface of a polyester film having a thickness of 25 μm as a support with a bead mill. -1 part by weight of pigment-2 parts by weight of saturated polyester (Toyobo: Byron 103)-4 parts by weight of acrylic resin (Mitsubishi Rayon: BR-80)-15 parts by weight of toluene-15 parts by weight of 2-butanone It was applied with a wire bar to a thickness of 1.5 μm and dried to prepare a transfer foil.

The following reagents were used as blue pigments.・ Asahi Super Blue CR (made by Asahi Kasei Corporation)

The transfer foil for the overcoat layer was prepared by using a polyester film having a thickness of 25 μm as a support and dispersing a coating solution having the following composition on the surface with three rolls to obtain a transfer coating solution.・ 75 parts by weight of lead borosilicate glass (manufactured by Nippon Electric Glass Co., Ltd .: “GA-9”) ・ 2.5 parts by weight of ethyl cellulose (manufactured by Kanto Chemical Co., Ltd.) ・ 2- (2-ethoxyethoxy) ethanol (Kanto) 22.5 parts by weight The above coating solution was applied with a wire bar so as to have a dry film thickness of 1.5 μm, and dried to prepare a transfer foil.

(Image formation) Semiconductor laser light is condensed from the back surface of the transparent substrate by an optical system so that the beam diameter on the surface of the infrared absorbing layer becomes about 100 μm of the stripe width of the color filter, and the transparent substrate is moved. Irradiation was carried out.
The laser beam irradiation and the movement of the transparent substrate are performed by using a semiconductor laser (manufactured by Sony Corporation: SLU304XR, output 1 W) and
Leather driver (manufactured by Global Electronics Industry: GSB3
530) and an XY stage (PS120 manufactured by Chuo Seiki Co., Ltd.)
XY, Controller CAT- + Driver SD-
Using P), the laser irradiation and the movement of the XY stage were synchronized by a control device mainly using a personal computer, so that the laser irradiation was performed so as to form a predetermined pattern. Next, the blue transfer foil is brought into close contact with the transparent substrate, then passed between pneumatic rollers and pressurized, and the transfer foil is peeled off so as to be close to 180 ° peeling, whereby the blue stripe pattern is formed on the transparent substrate. Was formed on the delayed tack layer. At this time, the required irradiation energy was about ² J / cm ² .

An adhesive layer having the following composition was applied on the blue stripe pattern formed on the transparent substrate. After drying, the film thickness was about 5 μm.

(Adhesive layer composition) 10 parts by weight of diallyl phthalate resin (Dap A, manufactured by Daiso) 3 parts by weight of polyester resin (byron 300, manufactured by Toyobo) 2 parts by weight of benzoguanamine resin (manufactured by Nippon Shokubai Co., Ltd.)・ Toluene 40 parts by weight ・ 2-butanone 40 parts by weight

Next, the transfer foil of the overcoat layer is brought into close contact with the substrate, and then passed between pneumatic rollers and pressurized, and the transfer foil is peeled off so as to be close to 180 ° peeling. It was formed on the adhesive layer of the transparent substrate.

The resin component was baked at 400 ° C. for 60 minutes in the air, thereby removing or evaporating the resin component. Then, by baking at 580 ° C for 10 minutes,
The silica coating agent was thermally condensed to form an overcoat layer 32 on the transparent substrate 10 as shown in FIG. 9, whereby a color filter in which the pigment 24 was fixed on the transparent substrate 10 was manufactured.

This color filter was excellent in flatness with the upper surface having irregularities of about 1 μm. Further, as a result of the acid / alkali etching, it was confirmed that the coloring material portion did not break down and that no pinholes were present. The measurement results of the spectral transmittance of this color filter are shown in FIG.
0 is shown.

Example 2 The following composition was applied to a cleaned glass substrate having a thickness of 1 mm with an applicator, and then applied.
It was dried at 0 ° C. to form an adhesive layer, and a transfer-receiving body was prepared. After drying, the film thickness was about 5 μm.

(Infrared absorbing layer composition) 10 parts by weight of polyester resin (manufactured by Toyobo Co .: Byron # 2000) 0.1 part by weight of isocyanate (manufactured by Asahi Kasei Corporation: Duranate 24A100) Infrared absorbing dye (manufactured by Nippon Kayaku: CY-9) 0.2 parts by weight ・ Toluene 45 parts by weight ・ 2-butanone 45 parts by weight

(Delayed tack pressure-sensitive adhesive layer) 50 parts by weight of dicyclohexyl phthalate 3 parts by weight of polyvinyl alcohol 3 parts by weight of nonionic activator 44 parts by weight of water

The transfer foil for a colored pattern was prepared by dispersing a coating solution having the following composition on the surface of the transfer foil for a colored pattern by using a bead mill with a polyester film having a thickness of 25 μm. -1 part by weight of pigment-2 parts by weight of saturated polyester (Toyobo: Byron 103)-4 parts by weight of acrylic resin (Mitsubishi Rayon: BR-80)-15 parts by weight of toluene-15 parts by weight of 2-butanone It was applied with a wire bar to a thickness of 1.5 μm and dried to prepare a transfer foil.

The following reagents were used as blue pigments.・ Asahi Super Blue CR (made by Asahi Kasei Corporation)

In the transfer foil for the overcoat layer, a 25 μm-thick polyester film was used as a support, and a coating solution having the following composition was used as a transfer coating solution on the surface.・ Silica coating agent (Nippon Soda Co., Ltd .: “Atron NSi 310”) 10 parts by weight ・ Ethyl cellulose (Kanto Chemical Co., Ltd.) 4.5 parts by weight ・ α-terpineol (Kanto Chemical Co., Ltd.) 5 parts by weight The above coating solution was applied with a wire bar so as to have a dry film thickness of 1.5 μm and dried to prepare a transfer foil.

(Image formation) Semiconductor laser light is condensed from the back surface of the transparent substrate by an optical system so that the beam diameter on the surface of the infrared absorbing layer becomes about 100 μm of the stripe width of the color filter, and the transparent substrate is moved. Irradiation was carried out.
The laser beam irradiation and the movement of the transparent substrate are performed by using a semiconductor laser (manufactured by Sony Corporation: SLU304XR, output 1 W) and
Leather driver (manufactured by Global Electronics Industry: GSB3
530) and an XY stage (PS120 manufactured by Chuo Seiki Co., Ltd.)
XY, Controller CAT- + Driver SD-
Using P), the laser irradiation and the movement of the XY stage were synchronized by a control device mainly using a personal computer, so that the laser irradiation was performed so as to form a predetermined pattern. Next, the blue transfer foil is brought into close contact with the transparent substrate, then passed between pneumatic rollers and pressurized, and the transfer foil is peeled off so as to be close to 180 ° peeling, whereby the blue stripe pattern is formed on the transparent substrate. Was formed on the delayed tack layer. At this time, the required irradiation energy was about ² J / cm ² .

An adhesive layer having the following composition was applied on the blue stripe pattern formed on the transparent substrate. After drying, the film thickness was about 5 μm.

(Adhesive layer composition) 10 parts by weight of diallyl phthalate resin (Dap A, manufactured by Daiso) 3 parts by weight of polyester resin (Byron 300, manufactured by Toyobo) 2 parts by weight of benzoguanamine resin (manufactured by Nippon Shokubai Co., Ltd.)・ Toluene 40 parts by weight ・ 2-butanone 40 parts by weight

Next, after the transfer foil of the overcoat layer is brought into close contact with the transparent substrate, the transfer foil is passed between pneumatic rollers and pressurized, and the transfer foil is peeled off so as to approach 180 ° peeling. Was formed on the adhesive layer of the transparent substrate.

This was baked at 400 ° C. for 60 minutes in the air to remove or remove the resin component by evaporation or burning. Then, by baking at 580 ° C for 10 minutes,
The silica coating agent was thermally condensed to form an overcoat layer 32 on the transparent substrate 10 as shown in FIG. 9, whereby a color filter in which the pigment 24 was fixed on the transparent substrate 10 was manufactured.

This color filter was excellent in flatness with the upper surface having irregularities of about 1 μm. Further, as a result of the acid / alkali etching, it was confirmed that the coloring material portion did not break down and that no pinholes were present.

[0071]

According to the method of manufacturing a color filter of the present invention, the options of the coating method are increased and the production stability is improved. Further, the cost can be reduced by speeding up the manufacturing process.

[0072]

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view showing an infrared absorbing layer and a delayed tack layer after coating in a production example of a color filter of the present invention.

FIG. 3 is a cross-sectional view showing a production example of a color filter of the present invention after irradiation with heat rays.

FIG. 4 is a cross-sectional view in which transfer foils (colored transfer layers) in a production example of a color filter of the present invention are superimposed.

FIG. 5 is a sectional view showing a state after a step of forming a transfer foil (colored transfer layer) in a production example of the color filter of the present invention.

FIG. 6 is a cross-sectional view showing a state after an application step of an adhesive layer in a production example of the color filter of the present invention.

FIG. 7 is a cross-sectional view showing a state after a transfer foil (overcoat layer) is overlaid in a production example of a color filter of the present invention.

FIG. 8 is a sectional view showing a state after a transfer foil (overcoat layer) is peeled off in a production example of a color filter of the present invention.

FIG. 9 is a cross-sectional view showing a state after a heating step in a production example of the color filter of the present invention.

FIG. 10 is a graph showing the result of measuring the spectral transmittance of the color filter of this example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Transparent substrate 11 Low melting point glass 12 Pigment 13 Infrared absorption layer 14 Delayed tack pressure-sensitive adhesive layer 15 Transfer receiving body 16 Delayed tack pressure-sensitive adhesive layer exhibiting tackiness 17 Delayed tack pressure-sensitive adhesive layer not exhibiting tackiness 21 Color transfer Layer 22 Support 23 Colored transfer layer on support side 24 Colored transfer layer transferred on delayed tack adhesive layer 25 Transfer foil (colored layer) 29 Adhesive layer 30 Transfer foil (overcoat layer) 31 Support 32 Overcoat Transfer layer

Claims (3)

[Claims] 1. A heat ray exposure step of irradiating a transfer member having at least an infrared absorbing layer and a delayed tack adhesive layer on a transparent substrate with heat rays having an image shape to be formed, and after the irradiation of the heat rays, the delayed tack adhesive Layers and
A contacting step of adhering a colored transfer layer comprising at least a colorant and a binder resin on a support, and a color transfer of a transfer foil having a configuration in which the transfer foil is adhered to the transfer foil after the adhering step; A transfer step of transferring and forming a colored pattern of a predetermined shape of a plurality of colors by repeating a series of these steps a plurality of times using transfer foils of different colors, after the transfer step, on the colored pattern A coating step of applying an adhesive; a bonding step of bonding the adhesive layer on the transparent substrate to a transfer layer of a transfer foil provided with an overcoat medium on a support after the coating step; and a transfer after the bonding step. A peeling step of transferring the overcoat medium to the entire surface of the substrate by peeling the foil from the transparent substrate; and, after the peeling step, heating the transparent substrate to bake the resin component. That process, a method of manufacturing a color filter, characterized by at least including. 2. The method according to claim 1, wherein said colorant is composed of an inorganic pigment. 3. The method for producing a color filter according to claim 1, wherein the overcoat medium contains a resin having plasticity at room temperature and a low-melting glass or an inorganic oxide.