JPH0312465A - Light-permeable colored material - Google Patents

Abstract

PURPOSE:To provide the subject material not requiring any oxygen-shutting film and used for a color filter, etc., by adding a photo-crosslinking agent comprising a diazo compound, etc., and a surfactant to a photo-sensitive resist and further dispersing a coloring agent in the mixture. CONSTITUTION:A photo-crosslinking agent comprising a diazo compound or an azo compound and a surfactant are added to a photo-sensitive resist, followed by dispersing a coloring agent in the mixture to provide the objective material.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a translucent colored material that is used, for example, for color filters and is formed by dispersing a coloring agent in a photosensitive resist.

BACKGROUND OF THE INVENTION Transparent colored materials are used to manufacture, for example, color filters for color liquid crystal display devices. This color filter consists of three colored relief patterns of red, green and blue, and is used for full color display.

A typical prior art in-situ color filter fabrication process using transparent materials will be described with reference to No. 2I2I. 2nd U: As shown in A(1), a light-transmitting material 9 containing a water-soluble polymer such as gelatin without adding a photocrosslinking agent is coated on the glass substrate 1, and then dried.

Next, as shown in 20(2) and 20(3), the photomasks 3 are overlapped and exposed, and actual fishing is performed to form the first relief pattern 7 before coloring. ), the first colored relief pattern 4 is formed by dyeing with a dye and fixing with tannic acid and tartar. The above steps are further repeated to form second and third colored relief patterns 6.

Another typical prior art WJ fabrication process for color filters using a translucent coloring material in which pigments are dispersed in acrylic polymer resin and a photocrosslinking agent made of a bisazidized compound is added. This will be explained with reference to FIG. As shown in FIG. 3(1), a transparent coloring material 2 is applied onto a glass substrate 1 and then dried.

Next, as shown in FIG. 3(2), an oxygen barrier film 8 is applied and then dried. Next, as shown in No. 30 (3), the photomask 3 is overlapped and exposed to light.As shown in Fig. 3 (4), the oxygen barrier film is peeled off by washing with water, followed by development with alkali, and the first A colored relief pattern 4 is formed. Further, the above steps are repeated to form second and third colored relief patterns 5.6 shown in FIG. 3(5).

Problems to be Solved by the Invention In the color filter manufacturing process using the prior art shown in Figure 2, relief formation, dyeing, and fixation of water-soluble polymers such as gelatin are repeated, and in particular, after dyeing, tannic acid,
Since fixation treatment with tartar stone is required, there is a problem in that it is difficult to simplify the process.

Furthermore, since the stirred relief pattern is dyed without coloring the translucent material, uneven dyeing tends to occur and it is difficult to obtain a color filter with uniform color characteristics.

The prior art color filter manufacturing process shown in FIG. 3 uses a bisazide compound as a photocrosslinking agent. When a translucent colored material containing a bisazide compound is exposed to light in the air, as shown in formulas 1 to 3, oxygen in the air and nitrene radicals, which are radicals of the bisazide compound formed by the light, are generated. reacts, producing nitroso compounds and nitro encounters that do not contribute to cross-linking, hindering the cross-wetting reaction, and causing light iJ! of the translucent colored material. (There is a problem that H is not promoted.

11ν N, -R-Nff--Ra: N R,N: +2N
2j...(1): N R-N: +0
2 → O=N RN=O-(2): N-RN-N:
+20. →O, N-R-No, ... (3) Therefore, when using a bisazide as a photocrosslinking agent, a transparent coloring material is applied to prevent the reaction between nitrene radicals and oxygen17 Additionally, an oxygen barrier film is formed. Therefore, a new process of applying, drying, and peeling the oxygen barrier film is required, resulting in an increase in the number of processes. ! There is a problem in that the production yield decreases due to J-sizing.

Further, in this prior art, the colorant is dispersed in the photosensitive resist by stirring. Simply stirring the colorant does not result in uniform dispersion due to secondary aggregation of the colorant, so there is a problem in that it is difficult to obtain a color filter with uniform color characteristics.

An object of the present invention is to provide a translucent colored material that can simplify the process of producing a translucent colored film and produce a translucent colored film with uniform color characteristics.

Means for Solving the Problems The present invention provides a translucent colored material formed by dispersing a coloring agent in a photosensitive resist 1-, in which a diazo encounter or an azo encounter is added to the photosensitive resist 1-. This is a translucent coloring material characterized by adding a photocrosslinking agent and a surfactant.

Function According to the present invention, since a diazo compound or an azo encounter is used as a photocrosslinking agent, the crosslinking reaction is less affected by oxygen, and an oxygen barrier film is not required, so coating, drying, and peeling of the oxygen barrier film are easy. This process can be omitted.

Further, according to the present invention, since the surfactant treats the surface of the colored body, aggregation of colorants is prevented, and uniform dispersion of the colorant can be realized, thereby obtaining a color filter with uniform color characteristics. I can do it.

Examples A photosensitive resist made of a translucent one-color material of the present invention [...
Water-soluble polymers such as acrylic polymer resins, vinyl polymer resins, and gelatin can be used. For example, use a color filter as a translucent colored film!
! In order to prevent deterioration of the Honjo material during the heating process, the photosensitive resist has a heat resistance of approximately 200°C.
This is desirable.

Furthermore, when a heavy initiator is added to the polymer resin, it is desirable that the heavy initiator is also a substance that is not easily affected by oxygen.

As the coloring agent, dyes, pigments, etc. can be used. For example, J.A., which manufactures color filters for liquid crystal display devices,
Red pigments include (a) inorganic pigments such as red red, cadmium red, and cadmium mercury red; and (b) Burma Hon> Tread, Brilliant Carmine BS Burmane Ntread F 2 R, Bema. Azo pigments such as Woodcarmine FB and Lake 1/・Sodo C can be used. Green pigments include (a) inorganic pigments such as chrome green and emerald green, (ni+) azo pigments such as green'gold, and <C) phthalocyanine pigments such as phthalocyanine blue and polychlorobrome phthalocyanine. can be used. As a blue pigment, (
, :L) inorganic pigments such as ultramarine, blue blue (III blue) and cobalt blue, and (b) phthalocyanine pigments such as phthalocyanine blue and fast sky blue.

As the photocrosslinking agent, a diazo compound or an azo compound can be used. Either one may be photosensitive and added to the cyst, or both may be added.

Further, when an aromatic diazonium salt is used as a photocrosslinking agent, the reactions 8i between the aromatic diazonium salt and the polymer resin are shown in Equations 4 to 6.

(In the formula, R)l represents a polymer resin) In this way, photocuring of the transparent colored material progresses.

As the surfactant, anionic, cationic or nonionic surfactants can be used. but,
When manufacturing color filters for liquid crystal display devices, non-ionic surfactants are used because the use of ionic surfactants contaminates the liquid crystal material with associated ions contained in the color filter and reduces the voltage holding rate of the liquid crystal. It is desirable to use surfactants. Examples of nonionic surfactants include polyoxyethylene octyl phenol ether, sorbitan monostearate, and glycerol monostearate.

Is the photocrosslinking agent 1 to 2 weight by weight relative to the photosensitive resist? It is appropriate to add the surfactant in a ratio of 0.1 to 10 weight X T (≦) to the colorant.

Next, a specific example of the present invention will be described. Acrylic polymer resin P l+ot, olec RW-201
(trade name, Block Fine Chemical Co., Ltd. tJ), PboLolecRW, a photocrosslinking agent made of an azo compound.
-101B (Product name, Sekisui Fine Chemical Co., Ltd.%
) is gradually added to the above acrylic polymer resin at a ratio of 1 to 2% by weight with sufficient stirring using a stirrer to prepare a photosensitive resist.

On the other hand, an inorganic pigment and a surfactant dissolved in 1 to 10% by weight of water or alcohol to the inorganic pigment are placed in a ball mill or bead mill, and at the same time the inorganic pigment is pulverized and the surfactant is added around the inorganic pigment. Adsorb the agent. This inorganic pigment is added to the photosensitive resist described above and subjected to dispersion treatment using a ball mill or bead mill to obtain a translucent colored material. Here, inorganic raw materials and acrylic polymer F
The weight ratio with M fat is 1.10.

Next, a process for producing a color filter using the translucent colored material of the present invention will be explained with reference to FIG. As shown in FIG. 1 (1), a transparent colored material 2 of the present invention is placed on a glass substrate 1.
was applied with a spinner and dried at 80°C for 5 minutes. Next, as shown in Figure 1 (2), ultraviolet light <100 to 150 rnJ/cm2) was irradiated through the mask 3, and water was applied. Ring (do the elephant)

Next, as shown in Section 1 (3), after washing with water,
A heat treatment is performed at 0° C. for 10 minutes to harden the film and form a first colored relief pattern 4. The above steps are further repeated to form the second and third colored relief patterns 5.6.
form.

Effects of the Invention According to the present invention, since a diazotized compound or an azo compound is used as a crosslinking agent in place of a bisazidated compound, the step of providing an oxygen barrier film in the process of manufacturing a transparent colored film is no longer necessary, and the manufacturing process can be simplified. It can be simplified.

Furthermore, since the colorant is uniformly dispersed with the surfactant, a transparent colored film with stable color properties can be obtained.

[Brief explanation of the drawing]

Figure 1 is a color filter manufacturing process diagram using the translucent coloring material of the present invention, 2r2 is a color filter manufacturing process diagram using the translucent material of the previous technology, and 3rd rl
1 is a process diagram for manufacturing a thirsty color filter using a prior art translucent coloring material. 1...Glass substrate, 2...Translucent colored material, 3...
・Photomask, 4...first colored relief pattern,
5... Second colorant relief pattern, 6... Third colored relief pattern, 7... First relief pattern before coloring, S-oxygen barrier film, 9 Transparent material, 10...
light source

Claims (1)

[Scope of Claims] A translucent colored material formed by dispersing a coloring agent in a photosensitive resist, wherein a photocrosslinking agent consisting of a diazo compound or an azo compound and a surfactant are added to the photosensitive resist. Translucent colored material characterized by