JP2001312962A - Plasma display panel and its color filter forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color filter forming method for a plasma display panel, offering simple steps, facilitating the recovery of materials and improving the utilization rate of the materials. SOLUTION: The forming method comprises a first step of mixing a photosensitive material 4, having adhesiveness changed by the irradiation of an ultraviolet ray with a pigment 5 and laminating a transparent film 6, onto which it is applied, on a front plate 7 of the plasma display panel, a second step of irradiating the photosensitive material 4 applied onto the transparent film 6 with the ultraviolet ray 8 using a predetermined mask 8, and a third step of peeling off the transparent film 6 from the front plate 7 of the plasma display panel, while leaving the photosensitive material and the pigment in an area 9 of the ultraviolet ray irradiation on the front plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a color filter of a plasma display panel, and more particularly, to a method for simplifying a process and facilitating material recovery.
The present invention relates to a method for forming a color filter of a plasma display panel with improved material utilization.

[0002]

2. Description of the Related Art Among the conventional color filter pattern forming methods, the simplest method is a pattern forming method by screen printing. This method uses a screen stencil covered with an emulsion except for the part corresponding to the pattern to be coated with a color filter, and contains a pigment using a squeegee from the opening of the screen stencil in the area surrounded by the black mask. This is where the paste is poured. Although this method is simple, the disadvantage of screen printing itself is that the position accuracy and total pitch accuracy depend on the fineness of the screen plate, and it is necessary to extend the screen plate with a squeegee to make line contact. Low.

As a method capable of responding to higher definition than the screen printing method, there is a method using a photosensitive paste.
5 to 7 illustrate the above method.

According to this method, a photosensitive resin paste containing a pigment is mixed on a front plate 7 of a plasma display panel in which an electrode 2 is formed on a glass substrate 1 and a dielectric layer 3 is formed as a protective layer. 21 is applied over the entire surface by a screen printing method or the like (FIG. 5A), dried (FIG. 5B), and irradiated with ultraviolet rays 26 through a glass mask 25 (FIG. 5C). Thereafter, a pattern is formed by performing wet development 29 to form a red filter (FIG. 5D). Thereafter, a green filter is formed in a similar step (FIG. 6), and a blue filter is formed in a similar step (FIG. 7).

According to this method, it is possible to realize a definition that cannot be obtained by screen printing. However, since the paste is applied to the entire surface by screen printing or the like, there are disadvantages in that there is a step of drying a wet material and that the material utilization rate is poor. Furthermore,
To avoid these drawbacks, instead of applying paste,
There is a photosensitive sheet method in which a sheet-shaped sensitive material is laminated on a plastic film. But,
This method also requires a wet treatment in the developing step, and therefore requires a large-scale waste liquid treatment apparatus and the like. Also, the material utilization rate is poor, and the material recovery is also a solution,
There was a drawback that the yield was poor and the scale was large.

The following Table 1 shows the number of processes and the corresponding definition in each of the conventional methods in comparison.

[0007]

[Table 1]

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned drawbacks of the prior art, and in particular, to a plasma which is simple in process, easy in material recovery and improved in material utilization. An object of the present invention is to provide a method of forming a display panel and a color filter thereof.

[0009]

SUMMARY OF THE INVENTION The present invention basically employs the following technical configuration to achieve the above object.

That is, a first aspect of the method of forming a color filter of a plasma display panel according to the present invention is a method of forming a color filter of a plasma display panel, wherein the photosensitive layer changes its adhesiveness when irradiated with ultraviolet rays. A first step of mixing a material and a pigment, and laminating a transparent film coated with the material on the front plate of the plasma display panel, and applying a predetermined mask to the photosensitive material applied to the transparent film, And a third step of peeling the transparent film from the front plate of the plasma display panel and leaving the photosensitive material and pigment of the portion irradiated with the ultraviolet light on the front plate. , And the second
An aspect is characterized in that red, blue, and green color filters are formed by repeating the first to third steps three times, and a third aspect is that the transparent film has In a fourth aspect, a portion containing a red pigment, a portion containing a blue pigment, and a portion containing a green pigment are formed in a predetermined pattern in advance. Is characterized in that a black mask is previously formed on the front panel of the plasma display panel, and this black mask is used as a mask when irradiating the ultraviolet rays.

In a first aspect of the plasma display panel according to the present invention, a photosensitive material whose adhesiveness changes by irradiating ultraviolet rays and a pigment are mixed, and a transparent film coated with the mixture is coated with a transparent film. In a second aspect, the transparent film includes a portion containing a red pigment, a portion containing a blue pigment, and a green pigment. The portion to be formed is formed in a predetermined pattern, and the third aspect is characterized in that a black mask is previously formed on a front plate of the plasma display panel. Is what you do.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The method for forming a color filter of a plasma display panel according to the present invention comprises mixing a photosensitive material whose adhesiveness changes by irradiating ultraviolet rays with a pigment, and applying a transparent film coated with the mixture. A first step of laminating on the front plate of the plasma display panel, a second step of irradiating the photosensitive material applied to the transparent film with ultraviolet rays using a predetermined mask, A third step of peeling off the photosensitive material and the pigment in the portion irradiated with the ultraviolet rays on the front plate, peeling off the front panel of the display panel.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific examples of a plasma display panel and a method of forming a color filter thereof according to the present invention will be described in detail with reference to the drawings.

The same parts as those of the prior art are denoted by the same reference numerals, and description thereof is omitted.

FIGS. 1 to 3 show the structure of a plasma display panel and a method of forming a color filter thereof according to a first embodiment of the present invention.
In these figures, a photosensitive material 4 whose adhesiveness changes by irradiating ultraviolet rays 8 and a pigment 5 are mixed, and a transparent film 6 coated with this is laminated on a front plate 7 of the plasma display panel. Step 1 (FIG. 1A) and a second step of irradiating the photosensitive material 4 applied to the transparent film 6 with ultraviolet rays 8 using a predetermined mask 9 (FIG. 1).
(B)), the transparent film 6 is peeled from the front plate 7 of the plasma display panel, and the photosensitive material and the pigment of the portion 9R irradiated with the ultraviolet light are mixed with the front plate 7
A method of forming a color filter of a plasma display panel, comprising: a third step (FIG. 1C) to be left above; and repeating the first to third steps three times. Thus, a method for forming a color filter of a plasma display panel characterized by forming red, blue and green color filters is shown (FIGS. 1 to 3).

Hereinafter, the first example will be described in more detail.

In the manufacturing process of the front panel of the plasma display panel, first, a stripe pattern serving as a scanning and sustaining electrode is formed on a glass substrate 1 by a transparent conductive film. A bus electrode is formed in a similar stripe shape on the upper portion to complement the resistance value of the transparent conductive film. This bus electrode is formed by pattern printing with a silver paste or etching of a thin film such as chromium or copper. Further, a transparent dielectric layer 3 is formed on the entire surface of the light emitting surface by application by screen printing, drying, and baking.

A black mask 10 is formed on the upper portion of the rear plate (not shown) so as not to interfere with the emission of the phosphor of each cell on the back plate for reducing the reflection of external light. Then, a color filter is formed at a position corresponding to the phosphor pattern on the back plate.

Hereinafter, a method of forming a color filter according to the present invention will be described with reference to FIGS.

First, a plastic film 6 coated with an adhesive photosensitive resin 4 mixed with a red pigment 5 serving as a color filter material of a plasma display over the entire surface is hot rolled on a front plate 7 on which a transparent dielectric layer 3 is formed. Lamination is performed by a method or the like (FIG. 1A).

Next, an exposure operation using ultraviolet rays 8 is performed using a glass mask 9 having a transparent portion corresponding to the phosphor pattern formed on the rear substrate (FIG. 1B). Then, mechanically bonded plastic film 6
9R exposed to ultraviolet light by peeling off
Only the portion remaining on the glass substrate 7 side and not irradiated is
It remains on the plastic film 6 side. By repeating the above steps three times for the three primary colors of RGB, the color filter of the plasma display of the present invention is formed (FIGS. 1 to 3).

In FIG. 1 to FIG. 3, a portion to be a red filter is indicated by 9R, a portion to be a green filter is indicated by 9G, and a portion to be a blue filter is indicated by 9B.

After the color filter is formed on the front plate, baking is performed, and the organic components in the black mask and the color filter are ashed, so that both the black mask and the color filter contain only inorganic components.

Thereafter, application, drying, and baking are performed by screen printing or the like in the same manner as the first transparent dielectric layer, and a structure is adopted in which the black mask and the color filters are wrapped with glass components.

On this front plate, Mg having high spatter resistance is formed.
O is formed as a protective layer and an electron emission layer by a method such as electron beam evaporation, and the front panel of the plasma display is completed.

Further, the plasma display panel is manufactured by combining this substrate with a back plate and fixing the periphery thereof with a glass frit to form a closed container, and performing gas filling after exhaust baking.

(Second Specific Example) FIG. 4 is a diagram showing a second specific example of the present invention, and the second specific example will be described below in detail.

The second specific example is characterized in that a pattern of three primary colors of red, green and blue (RGB) is formed on the plastic film 16 in advance. Without using a glass mask,
By using the previously formed black mask 10 also as a mask for exposure, ultraviolet irradiation can be performed from the glass substrate 1 side. For this reason, the number of processes is reduced to 1/3, a glass mask is not used, and even for a black mask, the accuracy only needs to be secured for self-alignment.

As for the accuracy of forming a color filter pattern on the plastic film 16 side in advance, the margin can be increased by the width of the black mask, so that the pattern can be formed by a screen printing method or the like.

As described above, in the second specific example, the transparent film 16 has a portion 16R containing a red pigment, a portion 16B containing a blue pigment, and a portion 16G containing a green pigment in advance. A method for forming a color filter of a plasma display panel, wherein the color filter is formed in a predetermined pattern.

In this case, a black mask 10 is formed on the front plate 7 of the plasma display panel in advance, and this black mask 10 is used as a mask for irradiating the ultraviolet rays.

In the above-described specific example, the structure in which the black mask and the color filter are formed at the portion sandwiched between the transparent dielectric layers has been described. However, the black mask and the color filter may be located anywhere on the front plate. Regardless, the present invention can be applied to achieve the object of the present invention.

[0033]

The method for forming a color filter of a plasma display panel according to the present invention has the following effects because it is configured as described above. (1) To use a photo method using a glass mask,
Fineness equivalent to the method using a conventional photosensitive paste or photosensitive sheet can be realized. (2) Compared to the conventional pattern formation by screen printing, there is an effect that it is possible to cope with a high definition panel and that bleeding or the like does not occur. (3) Compared with the conventional method using a photosensitive paste and a photosensitive sheet, a drying step is unnecessary, and furthermore, wet development required in the printing photosensitive paste and the photosensitive sheet method is unnecessary. That is, the present invention is a completely dry process. Therefore, a large-scale device for waste liquid treatment is not required. (4) The number of steps is smaller than any of the methods. (5) Material recovery is easy.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a process of forming a red filter in a method of forming a color filter of a plasma display panel according to the present invention.

FIG. 2 is a view illustrating a step of forming a green filter subsequent to FIG. 1;

FIG. 3 is a view illustrating a step of forming a blue filter subsequent to FIG. 2;

FIG. 4 is a diagram showing a second specific example of the present invention.

FIG. 5 is a view showing a process of forming a red filter of a conventional example.

FIG. 6 is a diagram showing a step of forming a green filter following FIG. 5;

FIG. 7 is a view showing a step of forming a blue filter following FIG. 6;

[Explanation of symbols]

 Reference Signs List 1 glass substrate 2 electrode 3 dielectric layer 4 photosensitive material 5 pigment 6, 16 transparent film 7 front plate 8 UV light 9 glass mask 9R red filter portion left on glass plate 9G green filter portion left on glass plate 9B Blue filter portion left on glass plate 10 Black mask 16R Red pattern on film 16G Green pattern on film 16B Blue pattern on film

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[Procedure amendment]

[Submission date] May 15, 2000 (2000.5.1)
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007]

[Table 1]

Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court II (Reference) H01J 11/02 H01J 11/02 B F Term (Reference) 2H025 AA02 AB11 AB13 AB20 AC01 AD01 BC13 BC31 CC11 DA20 EA08 FA24 FA28 2H048 BA02 BA45 BB02 BB14 BB24 BB41 2H096 AA30 BA05 EA02 GA50 5C027 AA00 AA10 5C040 FA01 FA04 GA02 GA09 GH03 JA15 KA20 MA22 MA30

Claims (7)

[Claims] 1. A method of forming a color filter for a plasma display panel, comprising: mixing a photosensitive material whose adhesiveness changes by irradiating ultraviolet rays with a pigment; A second step of irradiating the photosensitive material applied to the transparent film with ultraviolet light using a predetermined mask, and a step of irradiating the transparent film with the transparent film in front of the plasma display panel. A third step of peeling the photosensitive material and the pigment in a portion irradiated with the ultraviolet rays from the face plate and leaving the photosensitive material and the pigment on the front plate. 2. A method for forming a color filter for a plasma display panel, wherein the first to third steps are repeated three times to form red, blue and green color filters. 3. The transparent film according to claim 1, wherein a portion containing a red pigment, a portion containing a blue pigment, and a portion containing a green pigment are formed in a predetermined pattern in advance. The method for forming a color filter of a plasma display panel according to claim 1. 4. The plasma display according to claim 3, wherein a black mask is previously formed on a front plate of the plasma display panel, and the black mask is used as a mask for irradiating the ultraviolet rays. A method of forming a color filter for a panel. 5. A plasma display panel comprising a mixture of a photosensitive material whose adhesiveness changes upon irradiation with ultraviolet rays and a pigment, and a transparent film coated with the mixture, laminated on a front plate of the plasma display panel. . 6. The transparent film, wherein a portion containing a red pigment, a portion containing a blue pigment, and a portion containing a green pigment are formed in a predetermined pattern in advance. The plasma display panel according to claim 5, wherein 7. The plasma display panel according to claim 5, wherein a black mask is formed on a front plate of the plasma display panel in advance.