KR100186560B1 - Method of forming fluorescence screen of color crt - Google Patents

Abstract

The present invention relates to a method for forming a fluorescent surface of a color brown tube.

That is, the fluorescent surface forming method of the color brown tube of the present invention uses a polymer film instead of the photoresist in forming the black matrix layer, the phosphor layer, and the color filter layer, so that the development process according to the use of the photoresist is not necessary. Reduce manufacturing costs by preventing and simplifying the process.

Description

How to Form Fluorescent Surface of Color Brown Tube

1 is a cross-sectional view of a fluorescent surface of a conventional color brown tube.

2 is a cross-sectional view showing a method of forming a phosphor according to the present invention (a) to (h).

3 is a cross-sectional view showing a method of forming a black matrix layer according to the present invention (a) to (e).

4 is a cross-sectional view showing a method of forming a color filter layer according to the present invention (a) to (h).

* Explanation of symbols for main parts of the drawings

21 panel 22 black matrix layer

23: polymer film 24, 26: shadow mask

25: first phosphor-forming material 25a: first phosphor layer

46: first color filter layer forming material 46a: first color filter layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to color brown tubes, and more particularly, to a method for forming fluorescent surfaces of color brown tubes, which is suitable for simplifying the process and reducing costs.

In general, in the color CRT, the fluorescent surface reproduces a color image, which is the ultimate purpose of the CRT, and serves to convey it to human vision.

The fluorescent surface is red (R), green (G) and blue (B) phosphor pixels having three primary color emission spectra of light, which is an all-optical device that converts image information received as an electric signal into visual information, and graphite as a light absorbing material. (Graphite) is applied separately on the inner surface of the panel.

The process of forming the fluorescent surface is divided into a light absorbing black material coating, that is, a BM (Black Matrix) process and a three-color phosphor pixel coating process, that is, a PH (Phosphor) process.

1 is a cross-sectional view of a fluorescent surface structure of a conventional color brown tube.

That is, the panel 1 is washed and dried, and then a photoresist is injected and applied.

Subsequently, exposure and development are carried out in sequence and graphite is applied. After etching the coated graphite in the following process, the development and drying process is performed to complete the BM process of forming the graphite strip 2 having a predetermined thickness.

Subsequently, the panel on which BM was formed was washed with warm / pure water → precoat liquid → drying → green or blue phosphor coating, drying, exposure, development, drying → green or blue phosphor coating, drying, exposure, development, drying → red phosphor coating and drying. The pH is completed by performing exposure, development, drying-emulsion coating, and drying process.

This will be described in detail as follows.

First, a mixture of the first phosphor (green or blue phosphor) and the photosensitive resin is applied and dried to form a green phosphor or a blue phosphor.

The fluorescent surface formed as described above forms a shadow mask to accurately emit the three electron beams emitted from the electron gun to the phosphor pixel position for each pixel, and then irradiates ultraviolet rays through the holes of the shadow mask.

At this time, the irradiation position of ultraviolet rays corresponds to a position at which the electron beam for emitting the phosphors collides, that is, a position at which the phosphors should be fixed.

The photosensitive resin in the portion irradiated with ultraviolet rays is not dissolved, and thus the filler in this portion is not dissolved.

Subsequently, a mixture of the second phosphor (blue or green phosphor) and the photosensitive resin is applied and dried to form a blue phosphor or green phosphor, and again using a mixture of the third phosphor (red phosphor) and the photosensitive resin as in the first and second Red phosphor is used throughout the process.

When the three-color phosphor (3, 4, 5) coating process is completed as described above, aluminum is deposited. An emulsion is coated before the aluminum deposition to complete the PH process.

However, the conventional color-brown tube fluorescent surface formation method as described above has the following problems.

First, the number of processes according to the fluorescent surface formation is complicated.

Second, in performing exposure and development after applying the phosphor, undeveloped color is generated and mixed color occurs.

Third, a large amount of water is required for the development process and water pollution is caused by the presence of fluorescent substances in the water. Therefore, to purify such water requires a lot of money.

The present invention has been made in order to solve the above problems, and its object is to simplify the process and reduce the cost. Another aim is to minimize water pollution.

In order to achieve the above object, a fluorescent surface forming method of a color brown tube according to the present invention includes a first step of forming a black matrix at a predetermined distance on a panel, a second step of depositing a polymer film on a black matrix including the panel, A third step of patterning the polymer film to expose a predetermined portion of the surface of the black matrix and a predetermined portion of the panel surface, and a fourth step of depositing a first fluorescent substance on the entire surface including the exposed panel and the black matrix surface; A fifth step of selectively exposing the first phosphor material to form a first phosphor layer, a sixth step of removing the polymer film and a first phosphor material other than the first phosphor layer, and a front surface including the first phosphor layer A seventh step of forming a second phosphor layer forming region by depositing and patterning a polymer film, and a second phosphor on the entire surface including the second phosphor layer forming region Depositing a quality achieved by selectively ninth step, the same method as in forming the second phosphor layer exposed to form a second fluorescent layer includes a tenth step of forming a third phosphor layer.

Hereinafter, a method of forming a fluorescent surface of a color brown tube of the present invention will be described with reference to FIGS. 2 and 3.

The fluorescent surface forming method of the present invention is largely divided into a black matrix layer, a color filter layer, and a phosphor layer forming process.

2 (a) to (h) are process cross-sectional views showing the phosphor forming method of the present invention, and FIGS. 3 (a) to (e) are process cross-sectional views showing the black matrix forming method according to the present invention.

First, as shown in FIG. 2A, the black matrix layer 22 is formed on the panel 21 of the color brown tube at a predetermined interval from each other.

Herein, the black matrix layer forming process will be described in detail.

That is, as shown in (a) of FIG. 3, the panel 31 of the color brown tube is washed and dried, and then the polymer film 32 is deposited on the panel 31.

Subsequently, as shown in FIG. 3 (b), the portion to be coated with the black matrix material is selectively exposed using the shadow mask 33.

Accordingly, as shown in FIG. 3 (c), the polymer film 32 of the portion irradiated with light is removed and the polymer film 32a of the portion not irradiated with light remains intact.

Subsequently, as shown in FIG. 3 (d), the black matrix material 34 is deposited on the entire surface including the remaining polymer film 32a and then dried. When the polymer film is removed, only the black matrix material 34a remains as shown in FIG.

At this time, the black matrix material 34a on the remaining polymer film 32a is simultaneously removed when the polymer film 32a is removed.

When the BM process (black matrix process) is completed, the first polymer film 23 is deposited on the entire surface of the panel 21 including the BM 22 as shown in FIG.

Subsequently, as shown in FIG. 2 (c), light is selectively irradiated using the shadow mask 24 so that the first polymer film 23 of the portion to which light is irradiated as shown in FIG. Is selectively removed to expose a portion of the surface of the panel 21.

Next, the first phosphor material 25 is deposited on the entire surface including the exposed panel 21 surface as shown in FIG. 2E and then the shadow mask 26 as shown in FIG. 2F. When the light is selectively irradiated using the?, The first fluorescent layer 25a is formed at the portion to which the light is irradiated, as shown in FIG.

Subsequently, when the remaining first polymer film 23 is removed, only the BM 22 and the first fluorescent layer 25a remain on the color CRT panel 21 as shown in FIG. 2 (h).

In this case, the first phosphor material 25 on the remaining first polymer film 23 is removed at the same time when the remaining first polymer film 23 is removed.

Subsequently, although not shown, a second polymer film is deposited on the entire surface including the first fluorescent layer 25a. When the second and third fluorescent layers are sequentially formed in the same manner as the method of forming the first fluorescent layer 25a, the process of forming the phosphor of the color brown tube of the present invention is completed.

4 (a) to (h) are process cross-sectional views showing the color filter layer forming method according to the present invention.

The formation method of a color filter layer is the same as the phosphor formation process of FIG. 2 (a)-(h).

That is, the first, second, and third color filter layers R, G, and B are formed instead of the first, second, and third phosphor layers R, G, and B.

In other words, the black matrix layer 42 is formed on the panel 41 as shown in FIG. 4 (a), and the polymer film 43 is deposited as shown in FIG. 4 (b). As shown in (c) to (d), the first color filter layer forming region 45 is patterned.

Then, as shown in FIG. 4E, the first color filter layer forming material 46 is applied to the entire surface including the first color filter layer forming region 45, and then the shadows as shown in FIG. The first color filter layer forming material 46 is exposed by using the mask 47 to form the first color filter layer 46a, as shown in FIG. 4 (g).

Subsequently, the second and third color filter layers are patterned using the polymer film in the same manner as in the first color filter layer 46a forming process.

In this manner, the color filter layer forming process is completed.

As described above, the fluorescent surface forming method of the color brown tube of the present invention has the following effects.

First, the photoresist coating process, the nicking process, the precoat coating process and the developing process according to the phosphor are not required, thereby greatly reducing the manufacturing cost.

Second, it does not use chemicals and water to prevent water pollution.

Third, it improves the yield by eliminating the defects due to mixed color and photoresist coating.

Claims (9)

A first step of forming a black matrix at a predetermined distance on the panel; A second step of depositing a polymer film on the black matrix including the panel; A third step of patterning the polymer film to expose a predetermined portion of the black matrix surface and a predetermined portion of the channeling surface; A fourth step of depositing a first phosphor material on the entire surface including the exposed panel and the black matrix surface; A fifth step of selectively exposing the first phosphor material to form a first phosphor layer; A sixth step of removing the first phosphor material other than the polymer film and the first phosphor layer; A seventh step of patterning a second phosphor layer forming region after depositing a polymer film on the entire surface including the first phosphor layer; An eighth step of depositing a second phosphor material on the entire surface including the second phosphor layer forming region and selectively exposing the second phosphor layer; And a ninth step of forming a third phosphor layer by the same method as the second phosphor layer formation. The method of claim 1, wherein the polymer film is a noblock resin film. The method of claim 1, wherein the first, second, and third phosphor layers are R, G, and B layers. The method of claim 2, wherein the noblock resin film is formed using a positive resist method. A first step of forming a polymer film on the panel; A second step of selectively removing the polymer film to pattern a black matrix material forming portion; And a fourth step of removing the black matrix material on the entire surface including the patterned polymer film. 6. The method of claim 5, wherein the polymer film is a novel resin. A first step of forming a black matrix at a predetermined distance on the panel; A second step of depositing a polymer film on the black matrix including the panel; A third step of patterning the polymer film to expose a predetermined portion of the black matrix surface and a predetermined portion of the panel surface; A fourth step of depositing a first color filter layer forming material on the entire surface including the exposed panel and the black matrix surface; A fifth step of selectively exposing the first color filter layer forming material to form a first color filter layer; A sixth step of removing a first color filter layer forming material other than the polymer film and the first color filter layer; A seventh step of forming a second color filter layer forming region by depositing and patterning a polymer film on the entire surface including the first color filter layer; An eighth step of depositing a second color filter layer forming material on the entire surface including the second color filter layer forming region and then selectively exposing the second color filter layer; And a ninth step of forming a third color filter layer by the same method as the second color filter layer. 8. The method of claim 7, wherein the polymer film is a noblock resin. 8. The method of claim 7, wherein the noblock-based resin film uses a positive resist method.