KR100225725B1 - Manufacturing method of flworescent screen for color cathode-ray tube - Google Patents

Abstract

In the method of manufacturing a black matrix color cathode ray tube in which a phosphor dot is buried between the phosphor dots, the formation of the light reflection film in close contact with the matrix film is facilitated to improve the shape of the light reflection film and to improve the brightness. In addition, in order to provide a method for producing a color cathode ray tube fluorescent surface with improved yield, after forming a black matrix film 8 on the glass panel 1, each phosphor dot 12, 13, 14 in the black matrix hole 10 is formed. ), And the light reflection film 16 deposited on each phosphor dot 12, 13, 14 is formed thin, so that the light reflection film 16 can be easily peeled off together with the resin film 15 in the etching process. have.

Description

Manufacturing method of color cathode-ray tube fluorescent surface {Manufacturing method of flworescent screen for color cathode-ray tube}

[Industrial use]

The present invention relates to a method for producing a color cathode ray tube fluorescent surface, and more particularly, to a method for producing a color cathode ray tube fluorescent surface that simplifies the formation of a light reflection film on a black matrix film.

[Private Technology]

In general, a black matrix color cathode ray tube is filled with a non-light-absorbing material, such as graphite, between the green and blue red phosphor phosphor pixels in order to improve basic performance as an image display device, that is, contrast. The film of the photosensitive material is called a black matrix film, and a film that reflects light in a form free from the fluorescent screen, such as an aluminum film, is disposed on the entire surface of the fluorescent surface opposite to the display surface, such as an aluminum film. In addition, in order to improve the brightness, a method of forming a light reflector made of a light reflective material in close contact with the surface of the black matrix film is considered so that light emitted from the phosphor is not absorbed by the black matrix film. About the manufacturing method of a cathode ray tube fluorescent surface, a point is demonstrated according to the schematic manufacturing process drawing shown to (a)-(m) of FIG.

First, as shown in FIG. 2A, a photosensitive resin film 32 having polyvinyl alcohol and ammonium dichromate is formed on the inner surface of the color panel 31, and then, in FIG. As shown, through the shadow mask 33 arranged at a predetermined distance from the inner surface of the color panel 31, it is exposed by the ultraviolet light 34, and a part of the photosensitive resin film 32 is photocured. At this time, the photoresist-cured resin film 35 is located at a position where green, blue, and red phosphor pixels are formed later, and the exposure is usually performed three times while changing the relative positions of the color panel 31 and the light source.

Next, when the shadow mask 33 is removed and developed by hot water or the like, only the photoresist-cured resin film 35 remains on the color panel 31 as shown in FIG.

As shown in (d) of FIG. 2, the graphite suspension is applied and dried over the entire inner surface of the color panel 31 to form the graphite film 36. As shown in FIG.

Next, as shown in FIG. 2E, the light reflection film 37 is formed on the graphite film 36 by vacuum vapor deposition of a metal containing at least one material of silver, aluminum, and chromium. do.

Next, hydrogen peroxide water is deposited to swell the photocured resin film 35, and the graphite film deposited thereon by hot water spray and the above light reflecting film are removed together, as shown in FIG. As described above, the black matrix film 38 and the light reflection film 39 in close contact therewith are formed.

Next, as shown in FIG. 2G, phosphors, polyvinyl alcohol, and ammonium dichromate are formed on the inner surface of the color panel 31 in which the black matrix film 38 and the light reflection film 39 are formed. After the photosensitive resin phosphor film 41 is formed, it is exposed by the ultraviolet light 34 through the same shadow mask 33 as used in FIG. 2B, as shown in FIG. 2H. Then, a part of the photosensitive resin phosphor film 41 is photocured to form a green phosphor dot 42 that is a photocured phosphor film. Next, the shadow mask 33 is removed and developed with hot water or the like, and the step (i) of FIG. 2 is performed by changing the position of the exposure light source with respect to each of the phosphors of green, blue and red. As shown in FIG. (J), each of the phosphor dots 42, 43, and 44 of green, blue, and red are formed at the positions of the predetermined black matrix holes 40. FIG.

Next, as shown in FIG. 2 (k), on the inner surface of the color panel 31 on which the light reflection film 39 in close contact with the black matrix film 38 and the phosphor dots 42, 43, 44 are formed. After forming a thermosetting resin film 45 mainly composed of an acrylic emulsion or lacquer, and smoothing the surface of the fluorescent film, as shown in (l) of FIG. 2, light mainly containing aluminum is subjected to vacuum deposition. A reflective film, that is, a metal back film 46, is formed.

Next, as shown in (m) of FIG. 2, the organic components in the fluorescent film are dissipated by heat treatment, so that the phosphor dots 42, 43, 44, and the black matrix film 38 and the metal back film 46 are separated. The fluorescent surface of a color cathode ray tube is completed by forming a space | gap part in the inside.

As described above, according to the method for producing a color cathode ray tube fluorescent surface, as described with reference to FIGS. 2D to 2E, after forming the graphite film 36, vacuum deposition on the graphite film 36 is performed. The light reflection film 37 is formed, and then, as shown in FIG. 2 (f) in the etching step, hydrogen peroxide water is deposited, the photocured resin film 35 is swelled, By removing the graphite film and the light reflection film deposited thereon, the black matrix film 38 and the dense light reflection film 39 are formed thereon.

However, since the thicknesses of the graphite film 36 and the light reflection film 37 formed earlier are relatively thick, hydrogen peroxide water in the etching solution is difficult to infiltrate, and it is difficult to cut the edges of the photosensitive resin film 35 exposed first. There was. As a result, the shape of the light reflection film 39 after etching became bad, which caused the brightness to fall and the yield to fall.

1 is a schematic manufacturing process chart of a color cathode ray tube fluorescent surface of the present invention.

2 is a schematic manufacturing process diagram of a conventional color cathode ray tube fluorescent surface.

3 is a schematic cross-sectional view comparing thicknesses requiring etching.

Figure 3a is a prior art.

3B is a schematic diagram of the etching thickness in the present invention.

* Explanation of symbols for main parts of the drawings

1: glass panel 2: photosensitive resin film

3: shadow mask 4: ultraviolet light

5, 15: photocurable resin film 6: graphite film

7, 9: light reflection film 8: black matrix film

10 black matrix hole 11 photosensitive resin fluorescent film

12: green phosphor dot 13: blue phosphor dot

14 red phosphor dot 16, 17 light reflecting film

18: heat dissipation resin film 19: metal white film

[Means for solving the problem]

The present invention provides a method for producing a black matrix color cathode ray tube fluorescent surface in which a black matrix film between phosphor dots formed on an inner surface of a color panel is embedded with a light reflection film, the method comprising: forming a black matrix film on the color panel; Provided are a step of forming each phosphor dot in a matrix hole, and a light reflecting film formed on a black matrix film.

[Action]

According to the above structure, after forming the black matrix film, the phosphor dot is formed in the black matrix hole, and then the light reflection film is formed on the black matrix, whereby the light reflection film deposited on each phosphor dot is thinly formed. Therefore, in the next etching, since the light reflection film formed on the phosphor dot is thin, it is inevitably easy to infiltrate the etching solution, the light reflection film is easily peeled off together with the resin film, and the edges of the resin film are also easily cut and the black matrix The formation of the light reflection film formed in close contact with the film becomes favorable.

EXAMPLE

In the embodiment of the present invention, the points will be described with reference to the drawings. (A)-(g) of FIG. 1 is a schematic manufacturing process drawing which shows the manufacturing method of the color cathode ray tube fluorescent surface by this invention.

In Fig. 1, reference numeral 1 denotes a color panel, 8 denotes a black matrix film, 12 to 14 denote green, blue, and red phosphor dots obtained by photosensitive curing of the photosensitive resin phosphor film, and 16 denotes a close contact with the black matrix film. It is a light reflection film, 19 is a metal white film.

Here, the big difference between the prior art and the present invention is that the manufacturing method of the present invention consists of a manufacturing method of forming a black matrix film, then forming a light reflection film, and then forming respective phosphor dots. After forming a silver black matrix, each phosphor dot is formed and a light reflection film is formed after that. A description with reference to the drawings is as follows.

First, the process shown to (a)-(d) of FIG. 1 forms the photosensitive hardened resin film 5 and the graphite film 6 similarly to the conventional method.

As shown in FIG. 1A, after forming the photosensitive resin film 2 having polyvinyl alcohol and ammonium dichromate as a composition on the color panel 1, as shown in FIG. The exposure is performed by the ultraviolet light 4 through the shadow mask 3 arranged at a predetermined distance from the inner surface of the color panel 1, and a part of the photosensitive resin film 2 is photocured. At this time, the photoresist-cured resin film 5 is a position at which green, blue, and red phosphor pixels are formed, and three exposures are usually performed while changing the relative positions of the color panel 1 and the light source. Next, when the shadow mask 3 is separated and developed by hot water or the like, only the photoresist-cured resin film 5 remains on the color panel 1, as shown in FIG.

Next, as shown in (d) of FIG. 1, the graphite suspension is applied to the entire inner surface of the color panel 1 and dried to form the graphite film 6.

Next, the resin film 5 which is photosensitive and hardened by dipping hydrogen peroxide water is swelled, and the graphite film deposited thereon is removed by hot water spray, and as shown in FIG. 1E, the black matrix film 8 ) And the black matrix hole 10.

Next, as shown in FIG. 1 (f), a photosensitive resin fluorescent film having a phosphor, a polyvinylpyrrolidone, and an azide compound as a composition on the inner surface of the color panel 1 on which the black matrix film 8 is formed. After forming (11), as shown in (g) of FIG. 1, it was exposed by ultraviolet light 4 through the same shadow mask 3 as used in (b) of FIG. 1, and the photosensitive resin phosphor A portion of the film 11 is photocured to form a green phosphor dot 12 that is a photocured phosphor film. Next, the shadow mask 3 is removed and developed by hot water or the like, and the steps of (h) of FIG. 1 are performed by changing the positions of the exposure light sources with respect to the phosphors of green, blue, and red, respectively. As shown in (i), phosphor dots 12, 13, and 14 of green, blue, and red are formed at positions of the predetermined black matrix holes 10, respectively.

Next, as shown in FIG. 1 (j), after the photosensitive resin film 2 having polyvinylpyrrolidone and an azide compound is formed, as shown in FIG. 1 (k), It exposes by the ultraviolet light 4 through the shadow mask 3, and photosensitive hardens a part of the photosensitive resin film 2. FIG. Next, when the shadow mask 3 is separated and developed by hot water or the like, as shown in FIG. 1 (l), the photosensitive cured resin film 15 in close contact with each phosphor dot 12, 13, 14 is shown. ) And a black matrix film 8 remain on the glass panel 1.

Next, as shown in (m) of FIG. 1, the titanium oxide which becomes a light reflection film is formed in the whole surface, for example. Next, when the hydrogen peroxide solution is deposited in the etching step, the photoresist-cured resin film 15 is swelled and removed together with the titanium oxide deposited on the resin film 15 by hot water spray, as shown in FIG. As described above, the black matrix film 8, the light reflection film 17 and the phosphor dots 12, 13 and 14 formed in close contact therewith remain on the glass panel 1.

In addition, the process of (o)-(q) of FIG. 1 forms the fluorescent surface of the color cathode ray tube like the conventional method.

As shown in Fig. 1 (o), a heat dissipating resin mainly composed of an acrylic emulsion or lacquer on the inner surface of the glass panel 1 on which the black matrix film 8 and the respective phosphor dots 12, 13, and 14 are formed. After forming the film 18 and smoothing the surface of the fluorescent film, as shown in FIG. 1 (p), a film reflecting light mainly composed of aluminum by vacuum deposition, that is, a metal back film 19 To form.

Next, as shown in (q) of FIG. 1, the organic components in the fluorescent film by heat treatment are dissipated so that the respective phosphor dots 12, 13, 14, the black matrix film 8 and the metal back film 19 The fluorescent surface of a color cathode ray tube is completed by forming a space | gap between them.

In order to explain the difficulty of etching in the prior art and the present invention, FIG. 3 (a) shows a schematic cross-sectional view comparing only the thickness required for etching in the prior art and FIG. 3 (b). The thickness required for etching means L1L2 when the thickness of the prior art is L1 and the thickness of the present invention is L2, which means that the method of the present invention is easy to etch.

As mentioned above, according to the manufacturing method of the color cathode ray tube fluorescent surface of this invention, after forming a black matrix film, each phosphor dot is formed in a black matrix hole, and a light reflection film is formed on a black matrix after that, The light reflection film is deposited thinly on the phosphor dot.

Therefore, in the etching process of removing the resin film and the light reflection film on each phosphor dot, the etching solution is easy to infiltrate, and since the cutting property of the edge part of a resin film becomes favorable, the shape of a light reflection film becomes favorable. Therefore, the reflectance of the electron beam by the light reflection film becomes favorable, the effect which brightness raises is acquired, and a yield improves.

Claims (2)

A method for producing a color cathode ray tube fluorescent surface in which a black matrix film surface between phosphor dots formed on an inner surface of a glass panel is buried with a light reflection film, comprising the steps of: forming a black matrix film on the glass panel; A process for forming and a step of forming a light reflection film on the black matrix film are sequentially performed. A method for producing a color cathode ray surface, comprising: forming a black matrix film and a black matrix hole on an inner surface of a glass panel; forming a green, blue, and red phosphor dot at the black matrix hole, respectively; And forming a light reflection film on the black matrix film sequentially by forming a light reflection film on the black matrix film and removing the light reflection film on the phosphor dot.