KR910007705B1 - Resin having sensitivity to light and method of making a flourescent screen pattern with the same - Google Patents

Abstract

A fluorescent film pattern is formed by coating a photosensitive resin compsn. on the face-interior surface of the color braun tube, light-exposing the fixed plate by the ultraviolet irradiation, disperse-adhering a fluorescent powder on the face-interior surface, and treating a fluorescent film pattern formed by washing the surface with boric acid water. The resin compsn. is composed of 3% polyvinyl pyrrolidone, 0.4% diazonium cpd., 75% pure water, 0.5-5% ethylene glycol, 0.5-5% urea, 0.5-5% acetamide, 0.5-10% butanediol, 0.5-5% paraaldehyde, 0.5-5% dioxane and 0.5-5% surfactant.

Description

Photosensitive resin composition and fluorescent film pattern formation method using the same

1A to 1E are views for explaining a process of forming a fluorescent film pattern using the photosensitive resin composition of the present invention.

* Explanation of symbols for main parts of the drawings

1: face 2: photosensitive layer

3: shadow mask 4: phosphor film

5: fluorescent film pattern

The present invention relates to a highly sensitive photosensitive resin composition and a method for forming a fluorescent film pattern of a color brown tube using the same.

In general, the clarity of the screen in the color CRT depends on how fine and square the fluorescent film pattern of three colors of red, blue, and green can be formed on the inner surface of the face plate in a dot or stripe shape.

As a method of applying these phosphors to form a predetermined pattern on the inner surface of the face, a slurry coating method using a photosensitive resin composition in which phosphors are mixed, a mercury-excited ultraviolet ray is decomposed to decompose a dizonium salt, and zinc chloride absorbs moisture in the air. It is in the dry process by the photosensitive agent of the diazonium salt which absorbs and adheres.

In addition, the method of producing phosphors of Korean Patent Publication No. 90-1601, which is made by the same applicant as the present invention and supplements the disadvantages of these two methods, is 10 to 50% pure (by weight or less), 5 to 30% polyvinyl alcohol, Dichromate 0.05-5%, diethylene glycol 0.5-5%, ethylene glycol 0.5-5%, urea 0.5-5%, acetamide 0.5-5%, butanediol 0.5-10%, paraaldehyde 0.5-5%, dioxane A photosensitive resin composition of 0.5 to 5% and 0.5 to 5% of a surfactant is applied to the inner surface of the face, and ultraviolet rays are irradiated through a fluorescent film mask to expose only a predetermined portion, and then the phosphor powder is dispersed on the inner surface of the face to expose the exposed portion. It adheres, and removes the fluorescent substance of a non-exposed part with water, and processes with boric acid water, and shrinks and fixes a fluorescent substance pattern.

However, according to the conventional method of forming a fluorescent film pattern using such a photosensitive resin composition of polyvinyl alcohol-chromic acid component, the sensitivity and crystallinity of the photosensitive resin component to be used are low and "fog" during exposure. "Because the phenomenon appears and the exposure time can only be taken, the neatness and sharpness of the fluorescent film pattern which determines the clarity of the CRT screen is inferior and the working time is also long.

Accordingly, a first object of the present invention is to provide a highly sensitive photosensitive resin composition for forming a square and clear fluorescent film pattern.

A second object of the present invention is to provide a method for forming a square and clear fluorescent film pattern using the above-described highly sensitive photosensitive resin composition.

In order to achieve the first object, the present invention provides a predetermined photosensitive resin component and 0.5-5% of diethylene glycol with pure water, 0.5-5% of ethylene glycol, 0.5-5% of urea, 0.5-5% of acetamide, and 0.5-5 of butanediol. A photosensitive resin composition containing 10%, 0.5-5% of paraaldehyde, 0.5-5% of dioxane, and 0.5-5% of a surfactant, wherein polyvinyl pi is used instead of polyvinyl alcohol and dichromate as a photosensitive resin component of the composition. Using 3% of ralidone and 0.4% of diazonium compound and 75% of pure water, or 2% of diacetone acrylamide polyvinyl alcohol and 0.06% of dichromate and 72% of pure water It is characterized by.

In order to achieve the second object of the present invention, in forming a red, blue, and green fluorescent film pattern of a color brown tube, polyvinyl pyrrolidone 3%, diazonium compound 0.4% and pure water 75%, or diacetone acrylamide Polyvinyl alcohol 2%, dichromate 0.06%, diethylene glycol 0.5-5%, ethylene glycol 0.5-5%, urea 0.5-5%, acetamide 0.5-5%, butanediol 0.5-10%, paraaldehyde 0.5-5 %, Dioxane 0.5-5% and surfactant 0.5-5% of the photosensitive resin composition is applied to the inner surface of the face of the color brown tube, dried, and irradiated with ultraviolet rays through a shadow mask to expose only a predetermined portion, Subsequently, the phosphor powder is deposited on the inner surface of the face, and the pattern formed by washing the inner surface of the face with pure water is contracted and fixed by treating with boric acid water.

Hereinafter, the present invention will be described in detail with reference to Examples and drawings.

Example 1

First, the high-sensitivity photosensitive resin composition of the present invention is an insoluble polyvinyl pyrrolidone having photocrosslinking properties and crystallinity by irradiation of light and a diazonium compound which maintains photosensitivity by oxidizing with the polyvinyl pyrrolidone. 3% and 0.4% of the photosensitive resin component, 75% of pure water, and a plasticizer giving dryness and crystallinity, respectively 0.5-5% of diethylene glycol, ethylene glycol, urea and acetamide, 0.5-10% of butanediol, and para It contains 0.5 to 5% of aldehyde and dioxane and 0.5 to 5% of surfactant, respectively.

The composition process of the photosensitive resin composition of the present invention consisting of the composition ratio of the above components, after stirring the pure water and polyvinyl pyrrolidone and diazonium compound at room temperature while adding diethylene glycol and ethylene glycol for about 10 minutes After mixing well, urea, acetamide and butanediol are added sequentially, followed by mixing paraaldehyde and dioxane while continuing stirring and adding a surfactant. The composition obtained through the above process is filtered through 400 mesh.

Next, a method of forming a fluorescent film pattern using the photosensitive resin composition prepared through the above process will be described in detail with reference to FIG. 1.

(a) is a step of forming the photosensitive layer 2, and is formed by applying the above-described photosensitive resin composition to the inner surface of the color-brown tube face (1).

(b) is an exposure step, and the shadow mask 3 is mounted on the photosensitive layer 2 formed and dried in step (a) and irradiated with ultraviolet rays. At this time, the ultraviolet irradiation position corresponds to the position where the phosphor should be fixed. As described above, the first color exposed portion irradiated with ultraviolet rays through the hole of the shadow mask 3 has adhesiveness and insoluble to water.

(c) is a phosphor film forming step, and the phosphor film 4 is formed by spraying the phosphor powder of the first color by the spraying method or the sliding method.

(d) is a washing step. When washing with pure water, the exposed part to which the phosphor powder is attached is also insoluble due to the insolubility of the exposed part irradiated with ultraviolet rays in the exposing step of (b). A film pattern is formed.

(e) is a borate treatment step, in which the fluorescent film pattern 5 of the first color formed in the washing step of (c) is treated with boric acid water to shrink and fix the fluorescent film pattern 5.

The second and third color fluorescent film patterns are formed by repeating steps (a) to (e) in the same process.

Example 2

The photosensitive resin composition prepared by replacing the other components in the composition of [Example 1] with only polyvinyl pyrrolidone and a diazonium compound of photosensitive resin components with diacetone acrylamide polyvinyl alcohol 2% and dichromate 0.06% Using the same procedure as in [Example 1], a fluorescent film pattern was formed.

Table 1 shows the results of measuring the exposure sensitivity and the exposure time by comparing the fluorescent film patterns obtained in Examples 1 and 2 with the fluorescent film pattern using the conventional photosensitive resin composition.

TABLE 1

1. Comparison value when the conventional method is 100 in the same illuminance.

2. The comparison value when the time which becomes the width | variety of a fixed pattern is 100 when exposed by the conventional method in the same illuminance.

As described above, the fluorescent film pattern formed by using the high-sensitivity photosensitive resin composition of the present invention is significantly superior in neatness and clarity as compared with the conventional composition, thereby providing a high-quality color brown tube, as well as improving the exposure sensitivity, thereby increasing exposure time. There is an advantage in that the working time can be reduced since it is reduced.

Claims (2)

Predetermined photosensitive resin component and pure water and diethylene glycol 0.5-5%, ethylene glycol 0.5-5%, urea 0.5-5%, acetamide 0.5-5%, butanediol 0.5-10%, paraaldehyde 0.5-5%, di In the photosensitive resin composition containing 0.5 to 5% of oxane and 0.5 to 5% of a surfactant, 3% of polyvinyl pyrrolidone and 0.4% of diazonium compound are used as the photosensitive resin component of the composition, and the content of pure water is 75%. Or 2% diacetone acrylamide polyvinyl alcohol and 0.06% dichromate, and the content of pure water is 72%. In the red, blue, and green fluorescent film pattern formation method of a color-brown tube, polyvinyl pyrrolidone 3%, diazonium compound 0.4%, pure water 75%, or diacetone acrylamide polyvinyl alcohol 2%, dichromate 0.06% , 72% pure water and 0.5-5% diethylene glycol, 0.5-5% ethylene glycol, 0.5-5% urea, 0.5-5% acetamide, 0.5-10% butanediol, 0.5-5% paraaldehyde, 0.5-5% dioxane The photosensitive resin composition containing 5% and 0.5 to 5% of the surfactant is applied to the face inner surface of the color brown tube and dried, and irradiated with ultraviolet rays through a shadow mask to expose only a predetermined portion, and then the phosphor powder on the face inner surface. The method of forming a fluorescent film pattern, characterized in that to form a shrinkage, and to clean the inner surface of the face with a pure water treatment by shrinking and fixing the fluorescent film pattern with boric acid.

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