JP3398349B2 - Gas discharge panel, method of manufacturing the same, and method of manufacturing electrode for gas discharge panel - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a gas discharge panel, a method for manufacturing the same, and an electrode for the gas discharge panel,
In particular, the present invention relates to a plasma display panel and a manufacturing method thereof, and an improved technique in a manufacturing method of electrodes for the plasma display panel.

[0002]

2. Description of the Related Art Plasma display panel (PDP)
In recent years, gas discharge panels such as the above have attracted attention as flat display panels (FPD) that are relatively easy to have a large screen, and 50-inch class ones have already been commercialized. In this PDP, two thin glass plates (front panel glass and back panel glass) are opposed to each other via partition walls (ribs), and a phosphor layer is formed between the partition walls.
A discharge gas is sealed between both glass plates to hermetically seal the two. Electrodes called display electrodes are formed on the surface of the front panel glass, so that gas discharge is performed.

Here, FIG. 3A shows a front panel glass 2
FIG. 3 is a perspective view showing a pair of display electrodes 22 and 23 arranged on one side, and FIG. 3B is a front view looking down the pair of display electrodes 22 and 23 from the z direction. As shown in FIGS. 2A and 2B, the pair of display electrodes 22 and 23 are arranged in a direction orthogonal to the partition walls 30, and the transparent electrodes 220 and 230 in the form of strips have high conductivity bus lines (bus lines). Electrodes) 221 and 231 are stacked. Reference numeral 340 is a cell for partitioning an image, which is partitioned by the partition wall 30, and R (red), G (green), and B (blue) phosphor layers are provided for each cell. Then, in each cell, ultraviolet rays are generated in the discharge gas due to the discharge between the display electrodes, and the ultraviolet rays are converted into visible light in the phosphor layer to emit light. In the PDP, such cells 340 are arranged parallel to the longitudinal direction of the display electrodes 22 and 23, and a plurality of pairs of display electrodes 22 and 23 are formed, so that the cells for color display are arranged in a matrix. Are arranged.

Here, the bus lines 221 and 231 are made of Ag.
A transparent electrode 220, 230 is coated with a paste-like electrode material obtained by mixing an electrically conductive material such as, an inorganic component containing a glass component, and an organic component containing a vehicle component, and is baked. The glass component melts together with the conductive material during firing,
It solidifies in a mixed state with the conductive material that becomes the bus line body.
A glass component suitable for such a process is generally 420 ° C.
Many of them have the property of beginning to soften.

On the other hand, since the organic component is originally added for the purpose of facilitating application of the electrode material, it is unnecessary after the application. Further, in order to improve the conductivity of the electrode after firing, it is desirable to burn off the organic component during firing of the electrode. Therefore, a resin that burns (disappears) in the latter half of the 300 ° C. range (about 390 ° C. for an acrylic resin) is often added to the vehicle component of the commonly used organic components.

In the bus lines 221, 231, after the transparent electrodes 220, 230 are coated with the above-mentioned electrode materials, the front panel glass 21 is put in a baking furnace and gradually heated from around room temperature until finally 600 It is formed by firing at a high temperature close to ℃.

[0007]

By the way, according to the conventional bath line material, there is a temperature range in which the glass component is not yet softened while the vehicle component is burnt out during the firing (in the latter half of 300 ° C.). About 420 ℃). Therefore, the adhesive force does not act on the bus line material in this temperature range, so external factors such as the flow of atmospheric gas in the firing furnace and the vibration of the conveyor belt used in the manufacturing process, and organic components There is a case where the bus line material is displaced from the position where it should be originally formed or peeled off from the surface of the transparent electrode due to an internal factor such as a stress generated by the burning of the powder and the contraction of the volume of the bus line.

At present, it is considered that there is a problem to be solved regarding the electrode material from the above. The present invention has been made in view of the above problems, and its purpose is mainly to suppress the displacement of the conductive material during firing,
Provided are a method for manufacturing an electrode for a gas discharge panel capable of forming an electrode at an accurate position, a method for manufacturing a gas discharge panel using the manufacturing method, and a gas discharge panel manufactured by this manufacturing method. It is in.

[0009]

As a result of intensive studies made by the present inventors in order to solve the above problems, the present invention has revealed that the present invention is a coating method for applying an electrode material containing a glass component, a vehicle component and a conductive material onto a plate. As a method for producing an electrode for a gas discharge panel, which includes a step and a firing step of forming an electrode by firing the applied electrode material, the vanishing point of the vehicle component of the electrode material applied in the applying step is glass. The vehicle component or the glass component is selected and used so that the softening point of the component or more is obtained.

The term "vanishing point" as used herein refers to a temperature at which the vehicle component is burned and disappears when the vehicle component is a resin component. In addition, this value is TG-TDA (thermogravimetric-differential thermal analysis)
In Fig. 4, the peak position of the maximum temperature appearing in the exothermic temperature change curve (see FIGS. 4 to 5 for details) of the vehicle component in the electrode material measured by μV and the position where the weight change curve is saturated are assumed.

As a result, an intermolecular force due to the vehicle component or an adhesive force due to the glass component always acts between the conductive material and the plate side during firing.
Positional displacement between the two can be effectively suppressed. For such a vehicle component, when it actually has a vanishing point of 420 ° C or higher (above the softening point of the conventional glass component), the vanishing point is higher than the softening point of conventional glass components. Therefore, in the process after forming the electrode, the softening point at a somewhat high temperature (normal near the softening point of the glass component)
A glass component can be used. As the vehicle component, specifically, a cellulose resin, a polyethylene resin, a polystyrene resin, a polypropylene resin, or the like can be used.

When the softening point of the glass component of the electrode material is 380 ° C. or lower (below the vanishing point of the conventional vehicle component), the softening point becomes lower than the vanishing point of the conventional general vehicle component, Even if a conventionally used vehicle component having a low burning temperature is used, the same effect as described above can be obtained. Specific examples of such glass components include B ₂ O ₃ -P
bO-ZnO-based glass (however, PbO: ZnO: B ₂ O ₃
In the range of 85 to 95: 0.1 to 10: 3 to 10).

In the present invention, in the coating step, the electrode material added with the magnetic component is coated on the plate, and in the firing step, when the electrode material is fired while being fixed on the plate in a magnetic field, a magnetic force is exerted. This makes it possible to more effectively suppress the displacement of the conductive material. Further, the present invention, the first step of forming a pair of display electrodes on the surface of the first plate, after the first step, the surface of the first plate on which the display electrode is formed, and the second plate The first step as a method of manufacturing a gas discharge panel, comprising: a surface facing each other through a plurality of barrier ribs, and a second step of forming a region where a pair of display electrodes intersect between adjacent barrier ribs as a light emitting display cell. In the above, the display electrode can be formed by using any one of the methods for manufacturing an electrode for a gas discharge panel described above.

More specifically, it can be applied to a bus line in a display electrode of a plasma display panel, for example. When the bus line is formed by such a manufacturing method, the bus line can be formed uniformly over a plurality of cells of the panel without displacement, and thus it is possible to realize a plasma display panel having an excellent light emission balance.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION 1. First Embodiment 1-1. Overall Configuration of PDP FIG. 1 shows an AC surface discharge type plasma display panel which is an example of a gas discharge panel according to a first embodiment of the present invention. Ten
FIG. 3 is a partial cross-sectional perspective view showing the main configuration of (hereinafter, simply referred to as “PDP10”). In the figure, the z direction corresponds to the thickness direction of the PDP 10 and the xy plane corresponds to a plane parallel to the panel surface of the PDP 10. The PDP10 is a 42-inch class VGA as an example.
Although the size is set according to the specifications, the present invention may of course be applied to other sizes.

As shown in FIG. 1, the structure of the PDP 10 is roughly divided into a front panel 20 and a back panel 26 which are arranged with their principal surfaces facing each other. The front panel glass 21, which is the substrate of the front panel 20, has a thickness of 0 on one side.
1 μm wide 150 μm wide transparent electrode 220 (230) and thickness
A plurality of display electrodes 22 (23) (X electrodes 23, Y electrodes 22) each composed of a bus line 221 (231) having a width of 7 μm and a width of 50 μm are juxtaposed in the x direction with the y direction as the longitudinal direction. Surface discharge is performed in the gap between the display electrodes 22 and 23 (about 80 μm) (see FIG. 3 for details).

The front panel glass 21 on which the display electrodes 22 and 23 are arranged has a dielectric glass layer 24 having a thickness of about 30 μm and a protective layer 2 having a thickness of about 1.0 μm over the entire main surface of the glass 21.
5 are sequentially coated. The back panel glass 27, which is the substrate of the back panel 26, has a thickness of 5 μm on one side,
A plurality of address electrodes 28 having a width of 60 μm are arranged side by side in a stripe pattern at regular intervals (about 150 μm) in the y direction with the x direction as the longitudinal direction. The address electrodes 28 are included in the entire thickness of the back panel glass 27. A 30 μm dielectric glass film 29 is coated. On the dielectric glass film 29, a height of about 150 μm is set in accordance with the gap between the adjacent address electrodes 28.
A partition wall 30 having a width of 40 m and a width of about 40 μm is provided, and any one of red (R), green (G), and blue (B) is provided on the side surface of the adjacent partition wall 30 and the surface of the dielectric glass film 29 between them. Phosphor layers 31 to 33 corresponding to the crab are formed. These RGB phosphor layers 31 to 33 are sequentially arranged in the x direction.

The front panel 20 having such a configuration
The back panel 26 includes an address electrode 28 and display electrodes 22, 23.
While facing each other so that their longitudinal directions are orthogonal to each other, they are bonded and sealed at the outer peripheral edge portions of both panels 20, 26. A discharge gas (filled gas) composed of a rare gas component such as He, Xe, and Ne is filled between the two panels 20 and 26 at a predetermined pressure (normally about 500 to 760 Torr).

A discharge space 38 is formed between adjacent barrier ribs 30, and a region where a pair of adjacent display electrodes 22 and 23 and one address electrode 28 intersect with each other across the discharge space 38 is a cell 34 for image display (see FIG. (See 3). The cell pitch in the x direction is about 1080 μm, and the cell pitch in the y direction is about 360 μm. When driving the PDP, a panel driving unit (not shown) drives either the address (scanning) electrode 28 or the display electrodes 22 and 23 (in the present embodiment, the X electrode 23
And Generally, the X electrode 23 is a scan electrode and Y
The electrode 22 is referred to as a sustain electrode), and a pulse is applied to the cells to cause a discharge (address discharge) to each cell, and then a pulse is applied between the pair of display electrodes 22 and 23 to cause a discharge. As a result, short-wavelength ultraviolet light (resonance line having a center wavelength of about 147 nm) is generated, and the phosphor layers 31 to 33 emit light to display an image.

Here, one of the main characteristics of the PDP 10 is the structure centering on the bus lines 221 and 231. That is, the bus lines 221 and 231 are made of PbO—ZnO—B ₂ O ₃ based glass (PbO: Zn).
O: B ₂ O ₃ = 85 to 95 wt%: 0.1 to 10 wt%: _{3 to} 10 wt
% Of the glass component) and is fixed on the transparent electrodes 220 and 230 in a mixed state. This PbO-ZnO-
B ₂ O ₃ -based glass has a softening point of about (380) ° C., and has a vehicle component (for example, a cellulose-based resin, which will be described in detail in 3-1) that is burned off during firing of the bus lines 221 and 231. It is also included in the components of the bus line material.
Then, bus lines PbO-ZnO-B ₂ O ₃ -based glass with vehicle component the exact location on the transparent electrode 220 and 230
It serves to form the conductive material of 221 and 231. As a result, in the PDP 10, the bus lines 221 and 231 in each cell 34 are
However, variations in the arrangement position and lifting (peeling) are suppressed, and the finish is uniform.

The "softening point" referred to herein is the temperature at which the glass component softens to such an extent that it exhibits a viscosity (eg, η = 1 × 10 ⁴ P) that exerts an adhesive force on the transparent electrodes 220 and 230. Refers to. 1-2. Effects of the Present Invention According to the PDP 10 having the above configuration, when a pulse is applied to the display electrodes 22 and 23 of each pair at the beginning of the discharge sustaining period when the PDP is driven, the display electrodes 22 and The discharge is started in the gap of 23. Then, the plasma of the discharge gas expands into the discharge space 38, the discharge shifts to the sustain discharge, and the emission brightness gradually improves.

Here, in the present embodiment, each cell 34
Since the bus lines 221 and 231 are accurately arranged on the transparent electrodes 220 and 230 without variation, the discharge scale of each cell 34 becomes uniform, and it is possible to obtain a display performance with good light emission balance. In addition, the bus lines 221 and 231 are formed on the transparent electrodes 220 and 230 in a state where the conductive material is mixed with a glass component made of B ₂ O ₃ —PbO—ZnO glass, and the conductive material is partially included in the display electrode 22. , 23, the conductivity of both is impaired and the cells are not lit up locally, and the risk of avoiding such a situation is avoided.

2. Method of Manufacturing PDP Next, an example of a method of manufacturing the PDP of the above-described embodiment will be described. 2-1. Preparation of Front Panel A front panel glass 21 made of soda lime glass having a thickness of about 2.6 mm is prepared by the float method, and display electrodes 22 and 23 are prepared on the glass surface. First, the transparent electrodes 220 and 230 are formed by the following photoetching method.

The thickness of the front panel glass 21 is approximately
Photoresist with 0.5 μm (eg UV curable resin)
Apply. Then, a photomask having the pattern of the transparent electrodes 220 and 230 is overlaid, irradiated with ultraviolet rays, and immersed in a developing solution to wash out the uncured resin. Next, ITO or the like is applied as a material for the transparent electrodes 220 and 230 to the resist gap of the front panel glass 21. After that, the resist is removed with a cleaning liquid or the like to complete the transparent electrodes 220 and 230.

Then, on the transparent electrodes 220 and 230, for example, Ag
The bus lines 221 and 231 made of a conductive material are formed to complete the display electrodes 22 and 23. The method of forming the bus lines 221 and 231 is the most characteristic part of the present invention. This will be explained in detail later in 3-1. Next, the display electrodes 22, 2
Powdered glass component (eg PbO type glass component) and vehicle solution (0.2 g of homogenol as a dispersant) from above 3
t%, 2.5 wt% of a plasticizer, dibutyl phthalate, and 45 wt% of a cellulose resin), 55:45
To prepare a paste, which is coated on the entire front panel glass 21 and baked (1
Then, the dielectric glass layer 24 having a thickness of about 30 μm is formed.

After the dielectric glass layer 24 is formed, a protective layer 25 made of magnesium oxide (MgO) is formed on the surface of the dielectric glass layer 24 to a thickness of about 1.0 μm. The front panel 20 is manufactured as described above. 2-2. Fabrication of back panel A conductive material containing Ag as a main component is striped at regular intervals by a screen printing method on the surface of a back panel glass 27 made of a soda lime glass having a thickness of about 2.6 mm produced by a float method. Then, the address electrode 28 having a thickness of about 5 μm is formed.

Subsequently, the dielectric glass layer is formed over the entire surface of the back panel glass 27 on which the address electrodes 28 are formed.
Apply the same paste as 24 with a thickness of about 20 μm and bake it.
A dielectric glass film 29 is formed. Next, the dielectric glass film 29
With the same glass material as above, a height of about 120 is provided for each gap (about 150 μm) between adjacent address electrodes 28 on the dielectric glass film 29.
A partition wall 30 of μm is formed. This partition 30 is repeatedly screen-printed, for example, a paste containing the above glass material,
Then, it can be formed by firing.

After the partition walls 30 are formed, on the wall surface of the partition walls 30 and the surface of the dielectric glass film 29 exposed between the adjacent partition walls 30,
A fluorescent ink containing any one of a red (R) phosphor, a green (G) phosphor and a blue (B) phosphor is applied and dried.
The phosphor layers 31 to 33 are respectively fired. Here, examples of common phosphor materials are listed below.

(Y _x Gd _1-x ) BO ₃ : Eu ³⁺ green phosphor; Zn ₂ SiO ₄ : Mn blue phosphor; BaMgAl ₁₀ O ₁₇ : Eu ³⁺ (or B
aMgAl ₁₄ O ₂₃ : Eu ³⁺ ) For each phosphor material, for example, powder having an average particle size of about 3 μm can be used. There are several methods of applying the phosphor ink, and here, a method of ejecting the phosphor ink while forming a meniscus (crosslinking due to surface tension) from an extremely fine nozzle, which is called a known meniscus method, is used here. This method is convenient for uniformly applying the phosphor ink to a target area. The present invention is not limited to this method as a matter of course, and other methods such as a screen printing method can be used.

The back panel 26 is completed as described above. The front panel glass 21 and the back panel glass 27 are made of soda lime glass, but this is given as an example of the material, and other materials may be used. 2-3. Completion of PDP The produced front panel 20 and back panel 26 are bonded together using glass for sealing. After that, the interior of the discharge space 38 is evacuated to a high vacuum (8 × 10 ⁻⁷ Torr), and a Ne—Xe system or He— is supplied at a predetermined pressure (500 to 760 Torr).
A discharge gas such as Ne-Xe system or He-Ne-Xe-Ar system is filled.

The PDP is completed as described above. 3-1. Formation of Bus Line Here, the method of forming the bus line described above will be described in detail. The bus line material is formed as a paste-like material in which powder Ag (having an average particle size of 6 μm), an organic component including a vehicle component, and an inorganic component including a glass component are mixed. The conductive material may be other than the above, but it is preferable that the paste-like bus line material can be applied by the printing method.

Here, as the vehicle component of the organic component, a resin having a firing temperature in the latter half of 300 ° C. was used conventionally, whereas in the present invention, a resin having a vanishing point of 420 ° C. or higher (for example, about 451 ° C.) is used. Cellulosic resin having a vanishing point) is used as a main component. When such a vehicle component is used, a conventional glass component having a softening point of 400 ° C. or higher can be used, so that, for example, in the subsequent step of forming the dielectric glass layer,
A general glass component having a softening point at a certain temperature can be used.

In the present invention, the vehicle component is a polyethylene resin (a vanishing point of about 450 in addition to the cellulose resin.
C.), polystyrene resin (vanishing point about 440.degree. C.), polypropylene resin (vanishing point about 420.degree. C.) and the like. The vehicle component may be other than the above as long as it has a vanishing point of 420 ° C or higher. The organic component is a vehicle component (ethyl cellulose resin) 60w
t%, terpineol 30 wt%, homogenol 2 wt%
It is composed by the ratio of.

On the other hand, in the glass component of the bus line material,
For example, B ₂ O ₃ —PbO—ZnO based glass is used. Here, the mixing ratio of PbO: ZnO: B ₂ O ₃ is 85% by weight.
Set within the range of ~ 95: 0.1 ~ 10: 3 ~ 10. This composition is
When heated to a temperature of about 380 ° C., it begins to soften with a viscosity of η = 1 × 10 ⁴ P. As described above, in the present embodiment, the vanishing point of the vehicle component is 420 ° C. or higher and the softening point of the glass component is 380 ° C. or lower. As a result, in the present embodiment, before the vehicle disappears (burns out) from the start of firing, the intermolecular force due to the vehicle component is generated between the transparent electrode and the bus line material such as the conductive material, the inorganic component, and the organic solvent. Then, the adhesive force of the softened glass component is also applied from around the time before the disappearance of the vehicle component, so that the bus line material is not dislocated without interruption before and after the vehicle component is burnt out. With these measures, in the present embodiment, the flow of gas in the firing furnace and the vibration of the conveyor belt that conveys the front panel 20, etc., from the time when the vehicle component is burned down to the time when the glass component is softened as in the conventional case. As a result, the bus line material is prevented from being displaced on the transparent electrode, and the bus line is formed at an accurate position.

The bus line material is made into a paste by mixing an organic component, Ag and a glass component in a weight ratio of 40:10:50. A bus line having a thickness of about 7 μm and a width of 50 μm is formed on the transparent electrodes 220 and 230 by applying this to a desired position by a screen printing method and baking by heating at a maximum temperature of about 600 ° C. To do. 3-2. Difference between conventional and present invention bus line (electrode) materials Figure 5 shows the temperature characteristics of acrylic resin contained in the organic components of conventional electrode materials, TG-DTA (thermogravimetric-differential It is a graph showing a thermal analysis result. The acrylic resin used as the sample here contains some inorganic substances and the like necessary for performing the measurement. Approximately 30 ° C to approximately indicated by the dotted line in this figure
In the heating temperature profile up to 590 ° C, the weight change curve (dashed line) of the acrylic resin sharply decreases from around 300 ° C, and approaches constant around 390 ° C. At this time, according to the DTA curve (exothermic temperature change curve; solid line) measured by μV, the resin rapidly generates heat after 380 ° C. and burns. From this, it is understood that the vanishing point of the acrylic resin exists near the peak position of the exothermic temperature change curve and the saturation position of the weight change curve (388 ° C 390 ° C).

As described above, the conventional vehicle component is 300 ° C.
Many burn and burn in the latter half of the table. By the way, the softening point of the conventional glass component used for the bus line material is about (420) ° C. or higher (for example, about 500 for PbO—SiO ₂ glass).
C.), and there is a gap between the softening point and the firing temperature of the conventional vehicle component (for example, about 390.degree. C. for acrylic resin). Therefore, in the conventional bus line material, there is a temperature range in which the vehicle component is burned off at the time of firing, but the glass component is not yet softened (here, about
390 ℃ ~ 420 ℃). At this time, neither the intermolecular force due to the vehicle component nor the adhesive force due to the glass component acts between the bus line material and the transparent electrode. This causes the problem of displacement between the bus line and the transparent electrode as described in 3-1. To solve this problem, if the vehicle component of the electrode material has a higher vanishing point than before (for example, ordinary engineering plastics), the carbon component and other components unfavorable to the electrode may remain after burning out. May become an obstacle to ensuring good electrical performance of the.

Here, as a result of the study by the inventors of the present application, not only the vanishing point of the vehicle component and the softening point of the glass component are made close to each other, but also by reversing the relationship between the two temperatures, the bath during firing can be reversed. It has been found that intermolecular force and adhesive force act between the line material and the transparent electrode, and the bus line is accurately formed without displacement. Specific vehicle components that can obtain such effects include cellulosic resins, polyethylene resins, polystyrene resins, and polypropylene resins.

Here, FIG. 4 is a graph showing the results of TG-DTA (thermogravimetric-differential thermal analysis) showing the temperature characteristics of the cellulosic resin. 30 ° C to 592 ° C indicated by the dotted line in the figure
In the heating temperature profile up to, the weight change curve (dashed line) of the cellulosic resin once sharply decreases after passing 150 ° C., but thereafter, is gently maintained until passing 430 ° C. Also, according to the DTA curve (exothermic temperature change curve; solid line) measured by μV, the cellulosic resin exhibits characteristic peaks at three locations of about 203 ° C, about 374 ° C, and about 451 ° C. It suddenly generates heat and burns. From this, the heating temperature of the cellulosic resin is 200
It can be seen that, when the temperature exceeds ℃, it gradually decomposes to form intermediate clusters and finally exists up to 450 ℃ or higher.

Regarding this cellulosic resin,
It is believed that the higher its molecular weight, the more likely clusters of intermediate products will form during calcination and continue to exist at higher temperatures (ie, higher burnout temperature). Therefore, when actually used, it is desirable to use a cellulosic resin having a molecular weight of about 3 × 10 ⁴ or more. In addition, TG-D
The following can be considered from the result of TA. That is, these resins contain a relatively large number of multiple bonds or cyclic bonds in their molecular structure. These molecular bonds are more strongly bonded than, for example, a linear C—C single bond, and for this reason, they are considered to be superior in heat resistance to the vehicle component of the conventional bus line.

Therefore, cellulose resins, polyethylene resins, polystyrene resins, polypropylene resins and the like are suitable because they have a common property of containing many multiple bond or cyclic bond sites in their molecular structures. I think that the. However, since the vehicle component here is required to prevent carbon components from remaining as much as possible after the firing temperature, it is not sufficient that the vehicle component is a molecule having a multiple bond or a cyclic structure. It goes without saying that having it is essential.

Further, the inventors of the present invention make the softening point of the glass component lower than the vanishing point of the conventional vehicle component so that an intermolecular force or an adhesive force is always applied to the bus line material during firing as described above. I found that Specific examples of such a glass component include PbO-ZnO-B.
₂ O ₃ based glass (PbO: ZnO: B ₂ O ₃ = 85 to 95 wt.
%: 0.1-10 wt%: 3-10 wt% composition) is desirable.
It has a softening point of about 380 ° C., and is superior to general low melting point glass in terms of volume resistivity and compatibility with a conductive material.

By the way, in the present invention, at least any one of a cellulose resin, a polyethylene resin, a polystyrene resin, a polypropylene resin, etc.,
It is not necessary to combine with B ₂ O ₃ —PbO—ZnO based glass. The above-mentioned cellulosic resins and the like have a vanishing point higher than the softening point of conventional glass components, and B ₂ O ₃ -PbO-Zn
This is because the O-based glass has a softening point that is sufficiently lower than the vanishing point of the conventional vehicle component. Therefore, for example, any one of the above cellulose-based resins and the conventional glass component may be used in combination, or conversely, the conventional organic component and B ₂ O _3-
You may use together with PbO-ZnO type glass.

3-3. Variations Related to Bus Line Formation Here, variations of the bus line formation method described in 3-1 will be described. When the front panel coated with the bus line material is placed on the conveyor belt, the conveyor belt is driven to put the front panel glass into the cylindrical firing furnace, and when the process of firing the bus line is performed,
The following innovations can be made.

FIG. 3 is a sectional view of a system in which a front panel coated with a bus line material is put into a firing furnace by a conveyor belt (a sectional view taken along the conveyor direction of the conveyor belt). In the figure, 50 is a conveyor belt 53 is a drive roller.
A conveyor belt drive device is rotatably stretched by a 51 and a driven roller 52, and the conveyor belt 53 is passed through a cylindrical baking furnace 40. A substrate table 60 is arranged on the conveyor belt 50, and a front panel 20 coated with a bus line material is placed on the substrate table 60.

Here, the characteristic point of this variation is that the magnetic field applying device 41 is provided on the back side of the conveyor belt 53 in the baking furnace 40 (the surface opposite to the surface on which the substrate table 60 is arranged). Where it is. This magnetic field application device 41 includes three electromagnets 41A to 41C (iron core bodies 42a to 42c, coils 43a to) along the transport direction (y direction) of the transport belt 53 here.
43c, composed of disc-shaped magnetic field applying units 44a to 44c)
And energizing the coils 43a to 43c,
A magnetic field is applied to the bus line material from the magnetic field applying units 44a to 44c through the conveyor belt 53, the substrate table 60 and the like. At least one of the vehicle component and the glass component of the present invention is added to this bus line material, and further, iron particles having magnetism and the like are added. For the sake of convenience, the magnetic field applying device 41 is not shown in cross section in the figure.

According to such a system, when the bus line is fired, the magnetic component in the bus line material receives an electromagnetic attraction force from the magnetic field applying device 41, and the bus line material as a whole is given a predetermined amount on the front panel 20. Electromagnetically attracted to the position. This makes it possible to more effectively enhance the above-described effect of preventing positional deviation of the electrode material of the present invention. The magnetic field applying device 41 is preferably arranged at an internal position of the firing furnace 40, which is heated to a temperature range including the vanishing point of the vehicle component of the bus line material and the softening point of the glass component.

4. Other Matters In the above embodiment, an example in which the method for producing an electrode for a gas discharge panel of the present invention is applied to a bus line of a display electrode of a plasma display panel has been described, but the present invention is not limited to this. However, it may be applied to other electrodes such as address (scanning) electrodes.

Further, in 3-3, an example of firing the bus line by using an electromagnet is shown, but a natural magnet may be used instead. However, since the high heat of the firing furnace is applied to the magnet, it is necessary to use a magnet that has heat resistance up to about 400 to 450 ° C so that the magnetic force is not lost due to thermal denaturation, so in this sense it is safe to use an electromagnet. Seems to be.

VGA is used in the embodiments and examples.
Although an example of manufacturing the PDP of the method has been shown, it goes without saying that it may be applied to a PDP or a gas discharge panel of another standard. Further, the vehicle component of the present invention is not limited to the example in which any one of the above-mentioned plural kinds of resins is selectively used, and these may be used as a mixture. Furthermore, in the embodiment, the example in which the bus line material is applied using the printing method has been shown, but the present invention is not limited to this. For example, a photosensitive resin, a polymerization accelerator, etc. are added to the bus line material, the bus line material is applied on the front panel glass on which the transparent electrode is formed, and a mask having a certain shape is overlaid and exposed. Then, the bus line material may be formed by developing it and then baked.

[0050]

As is apparent from the above, the present invention is a coating step of coating an electrode material containing a glass component, a vehicle component and a conductive material on a plate, and baking the electrode material after coating. As a method for producing a gas discharge panel electrode through a firing step for forming an electrode, the vanishing point of the vehicle component of the electrode material applied in the applying step is equal to or higher than the softening point of the glass component. Since at least one of the glass components is selected and used, at least one of the intermolecular force due to the vehicle component and the adhesive force due to the glass component works continuously between the conductive material and the plate side during firing. The positional deviation between the material and the plate can be effectively suppressed.

Such a method for manufacturing an electrode for a gas discharge panel can be applied to manufacture of a display electrode of a gas discharge panel, for example, a bus line in a display electrode of a PDP. As a result, the bus lines are formed uniformly over the plurality of cells of the panel without displacement, so that it is possible to realize a PDP having an excellent light emission balance.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional perspective view showing the main configuration of a PDP according to a first embodiment.

FIG. 2 is a diagram showing a display electrode of the PDP according to the first embodiment. (A) is a partial perspective view of a display electrode. (B) is a front view of the display electrode.

FIG. 3 is a diagram showing a firing process of a display electrode according to a variation of the first embodiment.

[Fig. 4] TG-DTA showing temperature characteristics of cellulosic resin
It is a graph showing the result of.

FIG. 5 is a graph showing the results of TG-DTA showing the temperature characteristics of an acrylic resin.

[Explanation of symbols]

10 AC surface discharge type plasma display panel 20 Front panel 21 Front panel glass 22, 23 Display electrodes 24 Dielectric glass layer 26 back panel 28 Address electrode 38 discharge space 40 firing furnace 41 Magnetic field application device 42a-c Iron core 43a-c coil 44a-c Magnetic field application section 50 Conveyor belt drive 60 board stand 220, 230 Transparent electrode 221、231 Bus line

Front page continuation (72) Inventor Hiroyuki Tanaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hideki Marunaka 1-1 Sachimachi, Takatsuki, Osaka Prefecture Matsushita Electronics Industrial Co., Ltd. (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 9/02 H01J 11/02

Claims (8)

(57) [Claims] 1. A gas which goes through a coating step of coating an electrode material containing at least a glass component, a resin component and a conductive material on a plate, and a firing step of firing the applied electrode material to form an electrode. a method of manufacturing a discharge panel electrodes, as vanishing point of the resin component of the electrode material to be applied in the coating step is equal to or higher than the softening point of the glass component, trees
A method for manufacturing an electrode for a gas discharge panel, which comprises selecting and using at least one of a fat component and a glass component. 2. The method for producing a gas discharge panel according to claim 1, wherein the electrode material applied in the applying step has a vanishing point of the resin component of 420 ° C. or higher. 3. The resin component in the electrode material applied in the applying step includes at least one of cellulose resin, polyethylene resin, polystyrene resin, and polypropylene resin.
3. The method for producing an electrode for gas discharge panel according to 1 or 2. 4. The method for manufacturing an electrode for a gas discharge panel according to claim 1, wherein the electrode material applied in the applying step has a softening point of a glass component of 380 ° C. or lower. . 5. The gas discharge panel according to claim 1, wherein the glass component in the electrode material applied in the applying step is B ₂ O ₃ —PbO—ZnO-based glass. For manufacturing electrodes for use. However, the above B ₂
O ₃ -PbO-ZnO-based glass is PbO: ZnO: B ₂ O ₃
The weight ratio is 85-95: 0.1-10: 3-10. 6. The applying step comprises applying an electrode material to which a magnetic component is added onto a plate, and in the baking step, the electrode material is baked while being fixed on the plate in a magnetic field. Item 6. A method for producing an electrode for gas discharge panel according to any one of Items 1 to 5. 7. A first step of forming a pair of display electrodes on the surface of the first plate, and after the first step,
The surface of the first plate on which the display electrode is formed and the surface of the second plate are opposed to each other through a plurality of partition walls, and a region where a pair of display electrodes intersects between adjacent partition walls is formed as a light emitting display cell. A method of manufacturing a gas discharge panel having a second step of forming a display electrode by using the method of manufacturing an electrode for gas discharge panel according to any one of claims 1 to 6 in the first step. A method of manufacturing a gas discharge panel, comprising: 8. The gas discharge panel is a plasma display panel, comprising a display electrode having a bus line formed by the method for manufacturing an electrode for a gas discharge panel according to claim 4. Gas discharge panel.