JP3159825B2 - Method of manufacturing gas discharge 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 of manufacturing a gas discharge panel which is a self-luminous flat panel display using gas discharge.

[0002]

2. Description of the Related Art Conventionally, a gas discharge panel of this type has a structure in which a fluorescent layer is formed on at least one of a front plate and a back plate for the purpose of colorization. FIG. 5 shows a configuration example of a DC-type plasma display panel (hereinafter, referred to as PDP) which is a gas discharge panel having such a fluorescent layer formed thereon.

In this DC-type PDP, a flat front plate 1 and a rear plate 2 made of an insulating material such as glass are arranged parallel to and opposed to each other. A cell barrier 3 is fixed in a direction orthogonal to the face plate 2, and the gap between the front plate 1 and the back plate 2 is maintained at a constant distance by the cell barrier 3. A display anode 4 is formed on the inner surface of the front plate 1, and a cathode 5 is formed on the inner surface of the back plate 2 at right angles to the display anode 4. Are formed adjacent to each other. The display anode 4 and the cathode 5 are formed by a thick film printing method, and a base metal such as nickel is often used as the material.

In the DC type PDP, the display anode 4
By applying a predetermined voltage from a DC power supply between the anode and the cathode 5 to form an electric field, a discharge is performed in each discharge cell 7 between the front plate 1, the back plate 2 and the cell barrier 3. And
The fluorescent layer 6 is caused to emit light by the ultraviolet light generated by the discharge, and the light is transmitted through the front plate 1 to form a transmissive panel in which an observer can visually recognize the light.

[0006] As shown in FIG. 6, a fluorescent panel 6 is formed on the wall surface of a cell barrier 3 formed on a back plate 2, so that the reflection type panel which directly visually recognizes the light emission of the fluorescent layer 6 by ultraviolet rays is also available. Proposed. Also, as shown in FIG.
A structure in which a cathode 5 is provided on the front plate 1 and a display anode 4 is provided on the back plate 2 is also considered. The fluorescent layer 6 is also provided on the wall surface of the cell barrier 3 as shown in FIG. It has been proposed to form them on the back plate 2 except for 4 or both. In the PDP having such a structure, the cathode is usually formed by the thick film printing method as described above.

[0006]

The characteristics required of the cathode of the PDP having the above-mentioned structure include a low work function and a difficulty in sputtering.
There is a problem that this property is not completely satisfied by a commercially available conductive paste. For example, nickel paste can be cited as an electrode material that satisfies the above-mentioned characteristics to some extent, but has problems in discharge sustaining voltage, life, and the like. Therefore, it is preferable to form the cathode as a paste for thick film printing using an emitter material or the like that can be the cathode, but it takes a very long time to determine conditions such as the paste composition, viscosity, kneading, and firing temperature, which is practical. There are aspects that cannot be said.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object the following.
An object of the present invention is to provide a method of manufacturing a gas discharge display panel that can form a cathode having a function equivalent to that of an emitter material or the like without converting the material into a paste.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a front plate having a plurality of stripe-shaped first electrodes on the inner surface side arranged in parallel, and a front plate facing the first electrodes. And a back plate having a plurality of stripe-shaped second electrodes arranged on the inner surface side in parallel with each other in a direction orthogonal to each other, the plurality of stripe-shaped second electrodes being held at a constant interval by a cell barrier provided therebetween, and a plurality of And a method of manufacturing a gas discharge panel including a fluorescent layer at a desired portion in each cell, wherein an electrode functioning as a cathode among the first and second electrodes is disposed in front of the cell. A step of forming a thick plate printing method on the face plate or the back plate, a process of drying the front plate or the back plate on which the cathode is formed, and a process after the drying process.
The cathode surface side of the front plate or the back plate on which the cathode is formed
The steps of covering with a powder such as an emitter material are performed in order.
After that, remove the unattached powder by air development
Perform step is characterized in further steps the line Ukoto for firing the front plate or back plate. And usually,
It is preferable that the electrode functioning as a cathode be formed of nickel paste.

[0009]

1 is a sectional view showing an example of a gas discharge panel formed by the manufacturing method of the present invention, and FIG. 2 is a sectional view in a direction perpendicular to FIG.

The gas discharge panel is a DC type PDP. As shown in these figures, a front plate 1 and a back plate 2 are provided.
Are arranged so as to be parallel to and opposed to each other, and both are held at a fixed interval by a cell barrier 3 provided therebetween, and a plurality of display anodes 4 are formed in a stripe shape The rear plate 2 is provided with a plurality of cathodes 5 in a direction perpendicular to the display anodes 4 in a stripe shape. In addition, a fluorescent layer 6 is provided on the wall surface of the cell barrier 3. Here, the display anode 4 and the cathode 5 are formed of nickel paste, and the surface of the cathode 5 is covered with a powder 8 of an emitter material or the like. Such a DC-type PDP comprises a front plate 1 having a display anode 4 formed on the inner surface, a cathode 5 having powder 8 on the inner surface, and a back plate 2 having a cell barrier 3 having a fluorescent layer 6 on the inner surface.
It is created by combining.

The procedure for forming the cathode 5 with the powder 8 on the back plate 2 in the DC-type PDP having the above configuration will be described below with reference to examples. The size of PDP is 8
The powder 8 adhered only to the cathode 5 in a half area of the back plate 2 in order to compare the characteristics with the cathode 5 made of a nickel paste only.

First, as shown in FIG. 3A, a plurality of parallel stripe-shaped cathodes 5 having a width of 400 μm and a thickness of 20 μm are formed on a back plate 2 made of glass by a thick film printing method.
It is formed at a pitch of 0.65 mm. In this embodiment,
Nickel paste (Dupont, part number 9536D) was used in terms of cost, stability, and resistance value. Then, the back plate 2 on which the cathode 5 is formed is placed in an oven for 1 hour.
Dry at 30 ° C. for 15 minutes.

After this drying step, as shown in FIG.
Powder 8 such as an emitter material is sprayed on the cathode 5 and the powder 8 is embedded on the surface of the cathode 5 by rubbing with a spatula or a brush. In this embodiment, a red phosphor ((Y, Gd) BO ₃ : Eu) acting as an emitter is used as the powder 8. Subsequently, as shown in (c), the powder 8 that has not adhered is removed by air development. Then, firing is performed in the same manner as in the conventional case where the cathode is formed by the thick film printing method, and the cathode 5 with the powder 8 is obtained on the back plate 2 as shown in (d).

After the cathode 5 with the powder 8 is formed on the back plate 2 in this manner, the red phosphor 8 is irradiated with ultraviolet light (wavelength 25
When excitation light emission was performed at 4 nm), no peeling of the powder 8 or settling in the nickel paste was observed, and it was confirmed that the powder 8 uniformly covered the surface of the cathode 5.

Subsequently, a cell barrier 3 is formed on the back plate 2 and a fluorescent layer 6 is further formed on the side surface of the cell barrier 3. The VI characteristics of each of the display cells 7 provided with the cathodes 5 with 8 were measured. The measurement results are as shown in FIG. 4. In the figure, the curve shown by the dotted line is the measurement result in the display cell with the cathode 5 made of only nickel paste, and the curve shown by the solid line is the measurement result in the display cell with the cathode with the powder 8. is there. From this measurement result, it can be seen that the voltage of the cathode 5 to which the red phosphor acting as the emitter is adhered is lower when the current is clearly the same. From this, it was found that the cathode forming method of the present invention can provide a cathode exhibiting the characteristics of the emitter material, which is different from the characteristics of the original nickel paste. From the results of the VI characteristics, an increase in the luminous efficiency of the panel can be expected.

The emitter materials used in the present invention include Ba, BaAl ₄ , LaB ₆ , Y
_{There are 2} O ₃ , Gd ₂ O _{3 and the} like, and other materials that can be a cathode include SUS304, SUS316L, Ti
There are Ni alloy, 426 alloy and the like. In addition, any material that satisfies the objects of the present invention and can form a cathode can be used. In the above embodiment, a PDP of the type shown in FIG. 6 has been described. However, the present invention is applicable to all PDPs having an electrode functioning as a cathode in direct contact with the gas sealed in the PDP.

[0017]

As described in the foregoing, according to the method of manufacturing a gas discharge panel of the present invention, since so as to cover the surface of the electrode serving as a cathode in a powder, such as e Limiter materials, emitter materials etc. it is not necessary to paste for thick film printing Zhou covering the cathode of various materials in the form of powder
It can be state, thus it is possible to form a panel of higher luminous efficiency by simply adding a simple process.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a gas discharge panel formed by the manufacturing method of the present invention.

FIG. 2 is a sectional view in a direction orthogonal to FIG.

FIG. 3 is a process chart for explaining the manufacturing method of the present invention.

FIG. 4 shows V- of a gas discharge panel according to the manufacturing method of the present invention.
It is a figure which shows I characteristic compared with the conventional thing.

FIG. 5 is a sectional view showing an example of a conventional gas discharge panel.

FIG. 6 is a sectional view showing another example of a conventional gas discharge panel.

FIG. 7 is a sectional view showing still another example of the conventional gas discharge panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front plate 2 Back plate 3 Cell barrier 4 Display anode 5 Cathode 6 Phosphor layer 7 Cell 8 Powder

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tatsuya Takei 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside Japan Broadcasting Corporation Broadcasting Research Institute (72) Inventor Hiroshi Ishiga 1-1-1 Ichigagacho, Shinjuku-ku, Tokyo No. 1 Inside Dai Nippon Printing Co., Ltd. (72) Inventor Motohiro Oka 1-1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (56) References JP-A-1-225040 (JP, A) JP-A-2-295018 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01J 9/02 H01J 17/06

Claims (3)

(57) [Claims] 1. A front plate having a plurality of stripe-shaped first electrodes arranged in parallel on an inner surface side, and a plurality of stripe-shaped second electrodes opposed to the first electrodes and arranged in parallel in a direction perpendicular to the first electrodes. A plurality of cells as display elements are formed by holding a back plate having an electrode on the inner surface side at a predetermined interval by a cell barrier provided therebetween, and a desired portion of each cell is provided with a fluorescent light. A method for manufacturing a gas discharge panel comprising a layer, comprising: forming an electrode functioning as a cathode among the first and second electrodes on a front plate or a back plate by a thick film printing method; Step of drying the formed front plate or back plate , after this drying step
The cathode side of the front plate or back plate on which the cathode is formed is etched.
The steps of covering with a powder such as a mitter material are sequentially performed, and then,
The process of removing unattached powder by air development
And further baking the front plate or back plate.
Method for manufacturing a gas discharge panel, wherein a row Ukoto. 2. The method according to claim 1, wherein the electrode functioning as a cathode is formed of nickel paste. 3. A red phosphor is used as an emitter material.
3. The gas discharge pump according to claim 1, wherein
Manufacturing method of flannel.