JP3085375B2 - Method for manufacturing color plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plasma display panel used for an information display terminal or a flat-screen television, and more particularly to a method for manufacturing a color filter and a phosphor layer.

[0002]

2. Description of the Related Art A color plasma display panel is
The phosphor is excited and emitted by the ultraviolet light generated by the gas discharge to perform a display operation. It can be divided into AC type and DC type from the difference in the form of discharging.

An example of the configuration of a surface discharge type AC color plasma display panel will be described.

FIG. 4 shows a reflective AC surface discharge color plasma display panel (having no color filter layer).
FIG. A transparent electrode 2 is formed on a transparent glass front substrate 1 in a direction parallel to the plane of FIG.
Is covered with a transparent dielectric layer 4. Then, a protective layer 16 made of magnesium oxide is formed so as to cover the transparent dielectric layer 4.

On the other hand, on the rear substrate 7, data electrodes 8 for writing display data are formed of a thick metal film or a thin metal film. In FIG. 4, the data electrode 8 extends in a direction perpendicular to the paper surface, and the data electrode 8 is orthogonal to the transparent electrode 2 formed on the front substrate 1. This data electrode 8 is covered with a white dielectric layer 9. A white partition 10 is formed thereon, and a phosphor 11 is formed on the bottom and side walls of each discharge cell 17 partitioned by the white partition 10, the front substrate 1 and the rear substrate 7.
Is applied. It should be noted that the barrier described in this description represents a convex structure, and the partition is also a part of the barrier, but among the barriers, a structure for partitioning each discharge cell of the color plasma display panel is referred to as a partition. Express.

The above-described front substrate 1 and rear substrate 7 are bonded together to hermetically seal the discharge cells 17, and a dischargeable gas, for example, a mixed gas of helium, neon, and xenon is filled into the discharge cells 17 at about 500 Torr. .

As a method for improving the contrast and color purity of the above-mentioned color plasma display panel, there is a color filter method.

As an example of the structure of the color filter method,
There is a structure in which a filter layer is provided directly on the front substrate, which is disclosed in JP-A-9-92162. This is Figure 4
As shown in (1), a filter layer 5 that transmits a color corresponding to the emission color of each discharge cell 17 is formed on the front substrate 1, and a black mask made of the black barrier 3 is provided in a gap between the filter layers 5 to improve contrast. Have been. Since each color filter layer 5 is arranged corresponding to the emission color of each discharge cell 17, the emission wavelength region of the discharge cell 17 is transmitted with almost no attenuation, and the discharge cell 1 is not exposed to external light.
The wavelength region other than the emission wavelength region of No. 7 is absorbed. Also, the black mask reduces the reflection of external light, which results in improved contrast.

An example of a method for manufacturing the color filter and the black mask is disclosed in Japanese Patent Application Laid-Open No. 2-176602. In this process, as shown in FIGS. 6A to 6C, the steps of application, drying, exposure and development are repeated three times on the substrate 1 by photolithography to form three color filter patterns. Next, FIGS. 6D and 7
As shown in (a), a photoresist layer 18 exposed by photolithography is formed on the filter pattern. After covering the entirety with the non-light-transmitting film 19 as shown in FIG. 7B, the photoresist layer is peeled off together with the unnecessary part of the non-light-transmitting film, as shown in FIG. 7C. Obtain a black mask.

The above-described method involves the steps of exposing and developing each time a color filter of each color is formed, so that the steps are complicated and the efficiency of material utilization is low. A method using screen printing to solve this drawback is disclosed in Japanese Patent Application No. 9-041259. A method of manufacturing a color filter and a black mask according to this will be described with reference to FIG.

As shown in FIG. 8A, a black barrier 3 is formed on the front substrate 1 by printing and drying using a paste containing a black pigment by a thick film printing method. The thickness of the black barrier 3 is formed to be larger than the thickness of the color filter 5 to be formed next. Further, the black barrier 3 optically has a function as a black mask. Next, as shown in FIG. 8B, the screen 4 having a pattern with an opening width smaller than the interval between the black barriers is used, and the red color filter 5R is used.
Print. In the same manner, a green color filter 5G and a blue color filter 5B are formed as shown in FIG.

In this method, the color filter paste is spread over the gaps between the black barriers 3 using the screen 4 having a pattern having an opening width smaller than the gap between the black barriers 3. It does not require highly precise operation for positioning. Therefore, a screen printing method with low alignment accuracy but simple processing operation can be used in the color filter forming step.

[0013]

However, in the above-described method of forming a color filter by the screen printing method, it is necessary to spread the color filter paste from the narrow opening of the screen to the entire width of the black barrier. When the amount of the color filter paste discharged from the screen opening is small, there is a portion where the color filter is not formed. Conversely, if the paste discharge amount is increased to spread the color filter paste sufficiently,
The thickness of the color filter paste exceeds the barrier, and the paste reaches a position where a color filter of a different color is to be formed. As described above, there is a disadvantage that the margin of the printing condition is small, and the yield and the quality are reduced.

It is an object of the present invention to solve the above-mentioned problems and to provide a method capable of easily and accurately forming a pattern and capable of easily producing a high-quality color plasma display with high yield. It is.

[0015]

According to the present invention, there is provided a method of manufacturing a color plasma display panel comprising a step of providing a barrier on a substrate and a step of filling a gap between the barriers with a paste. Forming a smaller size than the gap and not firing, and pressing a second paste containing a solvent capable of dissolving the first paste between the barriers to increase the formation width of the first paste. The present invention relates to a method for manufacturing a color plasma display panel, comprising:

Further, according to the present invention, in the above invention, the first paste is formed by a screen printing method using a screen having an opening pattern having a width smaller than the distance between the barriers. The present invention relates to a panel manufacturing method.

In the method of manufacturing a color plasma display panel according to the present invention, since the first paste is formed to have a width smaller than the gap between the barriers, the first paste is formed to an unnecessary portion beyond the barrier. There is no end.
Since the first paste is spread by the second paste, there is no insufficient formation of a color filter.
That is, in the conventional method, since the spread width of the paste is adjusted by controlling the amount of the paste discharged from the screen, when the paste is sufficiently spread between the barriers, the width of the paste increases and the thickness increases. For this reason, the paste exceeds the barrier, but in the present invention, the width of the paste can be increased as much as possible while keeping the thickness of the paste thin, and a uniform image without color mixing or pinholes can be obtained over the entire screen. Can be.

Further, in a method of manufacturing a color plasma display panel having a structure in which a color filter and a black mask are provided on a front substrate, and the whole of the color filter and the black mask is covered with a dielectric material, By using the paste as the paste and the dielectric paste as the second paste, it is possible to provide a simple manufacturing method without increasing the number of steps as compared with the conventional method.

Further, in a method for manufacturing a color plasma display panel in which partition walls for partitioning discharge cells are formed on the rear substrate and phosphor layers are formed on the substrate surface between the partition walls and on the side surfaces of the partition walls, the first paste according to the present invention is used. Is a phosphor-containing paste, and the second paste is a paste of a resin or the like that disappears in the baking step, whereby a simpler method than the conventional method can be provided.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings by way of examples. The components that specifically embody the present invention will be described with reference to the drawings.
Portions containing important components are shown in separate drawings. With reference to this another drawing, the connection between the components and the role and function of each component will be described in detail. Description will be made with emphasis on non-conventional components that are features of the present invention.

(Embodiment 1) FIG. 1 is an explanatory view of a process for manufacturing a color filter and a black mask on a front substrate of a color plasma display panel.

As shown in FIG. 1A, for example, a front substrate 1 provided with a transparent electrode 2 containing tin oxide SnO ₂ as a main component.
The black barrier 3 is provided with a width of about 100 μm, a thickness of 10 μm, and a barrier interval width of 250 μm. Here, the black barrier 3 is formed by a screen printing method using a paste containing a black pigment, a low-melting glass powder, a resin, and a solvent.
It was formed by baking for 0 minutes.

Next, as shown in FIG.
Using a screen 4 having a pattern of 0 μm, a red filter paste was printed and dried at a width of about 150 μm between the black barriers 3 to form a red filter 5R. The red filter paste comprises, for example, a red pigment powder, ethyl cellulose and terpineol.

Subsequently, the green filter paste and the blue filter paste are printed and dried in the same manner as in FIG. 1B, and as shown in FIG. 1C, three color filters 5 (5R) having a width of about 150 μm are formed. , 5G, 5B). At this time, firing is not performed in forming any of the color filters.

Next, as shown in FIG. 1D, a transparent dielectric 6 is formed on the entire color filter 5 and the black barrier 3. Here, the transparent dielectric 6 contains low melting point glass powder, ethyl cellulose and terpineol, and has a viscosity of 100P.
It was formed by printing a solid pattern on a screen using the paste designated as a · s. At this time, since the terpineol contained in the paste of the transparent dielectric 6 dissolves the color filter 5, when the paste of the transparent dielectric 6 is spread between the black barriers 3 due to the pressure applied to the paste of the transparent dielectric 6, The color filter 5 can be spread completely between the black barriers 3.

Then, the substrate was dried and baked at 550 ° C. for 10 minutes to obtain a front substrate of a color plasma display panel on which a color filter and a black mask were formed.

The color filter obtained by the above-described method was free of color mixing and pinholes over the entire screen, and could obtain a uniform image. In addition, since a screen printing method whose process is simpler than that of the photolithography method is used, a color plasma display panel can be manufactured with good yield at low cost.

(Embodiment 2) FIGS. 2 and 3 are sectional views showing the steps of manufacturing a phosphor layer of a color plasma display panel.

As shown in FIG. 2A, a white partition wall 10 for partitioning discharge cells is formed on a rear substrate 7 provided with a data electrode 8 and a white dielectric layer 9 to have a width of 100 μm and a height of 120 μm.
m, the partition width is 250 μm. Here, the white partition walls 10 are formed of a white pigment and a low-melting glass, and are formed by patterning by a sandblast method and firing.

Next, as shown in FIG. 2B, a red phosphor layer 11R having a width of 150 μm was formed between the white partition walls 10. This was formed by printing and drying a paste containing a red phosphor, ethyl cellulose, and terpineol using a screen 4 having a pattern with an opening width of 100 μm.

Subsequently, as shown in FIG. 2C, a green phosphor layer 11G and a blue phosphor layer 11B were formed to have a width of 150 μm in the same manner. At this time, firing is not performed in forming any of the phosphor layers.

Next, as shown in FIG.
A resin paste made of ethylcellulose and terpineol is printed on the screen 4 having an opening width of 100 μm at each position of blue color, and over the entire phosphor layer 11 (11R, 11G, 11B) as shown in FIG. The resin layer 12 is formed. Here, the resin paste is spread from the center between the white partitions 10 by screen printing. Thereby, each phosphor layer is formed as shown in FIG.
As shown in FIG.

Next, baking is performed at 550 ° C. for 10 minutes to remove the resin layer 12, and as shown in FIG. 3C, a color in which the phosphor layer 11 is formed on the bottom and side surfaces between the white partition walls 10. A rear substrate of the plasma display panel was formed.

The rear substrate of the color plasma display panel obtained by the above-mentioned method has no color mixing or shortage of the phosphor,
A uniform image could be obtained. Further, since the phosphor layer can be formed by a screen printing method, a color plasma display panel can be formed with good yield at low cost.

[0035]

As described above, in the method of manufacturing a color plasma display panel according to the present invention, the first paste is formed between the barriers with a width smaller than the interval between the barriers.
By applying a second paste containing a solvent capable of dissolving the first paste between the barriers, the width of forming the first paste can be increased. As a result, it is not necessary to apply and form the first paste with high positional accuracy, and it is possible to form the first paste with high quality and a high yield by a simple method such as a screen printing method.

In particular, when forming a color filter, the color filter layer can be formed densely and self-aligned between the barriers without increasing the thickness of the color filter more than required. Thereby, a high-quality color plasma display can be formed with a high yield.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a process of manufacturing a color filter and a black mask of a color plasma display panel according to a first embodiment.

FIG. 2 is an explanatory diagram of a manufacturing process of a phosphor layer of a color plasma display panel according to a second embodiment.

FIG. 3 is an explanatory diagram of a manufacturing process of a phosphor layer of a color plasma display panel according to a second embodiment.

FIG. 4 is a cross-sectional view showing a structure of a color plasma display panel having no color filter layer.

FIG. 5 is a cross-sectional view illustrating a structure of a color plasma display panel having a color filter layer.

FIG. 6 is an explanatory diagram of a process for manufacturing a color filter and a black mask according to a conventional technique.

FIG. 7 is an explanatory diagram of a process for manufacturing a color filter and a black mask according to a conventional technique.

FIG. 8 is an explanatory diagram of a process for manufacturing a color filter by a screen printing method according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front substrate 2 Transparent electrode 3 Black barrier 4 Screen 5 Filter layer 6 Transparent dielectric layer 7 Rear substrate 8 Data electrode 9 White dielectric layer 10 White partition 11 Phosphor layer 12 Resin layer 16 Protective layer 17 Discharge cell 18 Photoresist layer 19 Non-translucent film

Claims (6)

(57) [Claims] 1. A method for manufacturing a color plasma display panel, comprising the steps of providing a barrier on a substrate and filling a gap between the barriers with a paste, wherein a first paste is formed between the barriers with a size smaller than a gap between the barriers. A color plasma comprising a step of not firing and a step of pushing a second paste containing a solvent capable of dissolving the first paste between the barriers to increase the width of formation of the first paste. Display panel manufacturing method. 2. The color plasma display panel according to claim 1, wherein the first paste is a paste containing a color filter forming pigment, and the second paste is a paste containing a low melting point glass. Manufacturing method. 3. The method according to claim 1, wherein the first paste is a paste containing a phosphor, and the second paste is a paste that disappears by heat treatment. 4. The method of claim 1, wherein the first paste is formed by a screen printing method using a screen having an opening pattern having a width smaller than a distance between the barriers. Method. 5. The method of claim 2, wherein the second paste is pressed by a screen printing method using a solid pattern screen. 6. The method of claim 3, wherein the second paste is pressed by a screen printing method using a screen having an opening pattern having a width smaller than the distance between the barriers. .