JP2004063119A - Method of manufacturing plasma display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a panel excellent in withstand voltage characteristics by enhancing transmissivity of a dielectric layer in a plasma display device. <P>SOLUTION: When forming the dielectric layer by applying dielectric paste having a binder resin and a glass frit and by baking it, air in a dielectric paste film 20 is first substituted with oxygen 22 and the dielectric paste film 20 is baked to form the dielectric layer. Thereby, carbon residues produced due to a deficiency of oxygen can be reduced by expediting burning of the binder resin by oxygen existing in the applied film when baking it, and since the film does not contain nitrogen which does not contribute to the burning, very small bubbles originated from the nitrogen can be reduced. Therefore, a dielectric having less defects in the film can be formed. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a plasma display device known as a large-screen, thin, and lightweight display device.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a plasma display device has been attracting attention as a display panel (thin display device) having excellent visibility, and higher definition and a larger screen are being promoted.
[0003]
This plasma display device is roughly classified into an AC type and a DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. At present, an AC-type and surface-discharge type plasma display device has become the mainstream due to its characteristics.
[0004]
4 shows an example of a panel structure in the plasma display device, FIG. 5 shows a cross section taken along line AA in FIG. 4, and FIG. 6 shows a cross section taken along line BB in FIG. As shown in the figure, a plurality of pairs of stripe-shaped display electrodes 4 formed by scanning electrodes 2 and sustaining electrodes 3 are formed on a transparent front substrate 1 such as a glass substrate. A light-shielding layer 5 is formed between adjacent display electrodes 4. The scanning electrode 2 and the sustaining electrode 3 are respectively composed of transparent electrodes 2a, 3a and buses 2b, 3b made of silver or the like electrically connected to the transparent electrodes 2a, 3a. A dielectric layer 6 is formed on the front substrate 1 so as to cover the plurality of pairs of electrodes, and a protective film 7 is formed on the dielectric layer 6, thereby forming a front panel. Have been.
[0005]
A plurality of stripes covered with an insulator layer 9 are provided on a rear substrate 8 opposed to the front substrate 1 in a direction perpendicular to the display electrodes 4 of the scan electrodes 2 and the sustain electrodes 3. A data electrode 10 is formed. A plurality of stripe-shaped partitions 11 are arranged on the insulator layer 9 between the data electrodes 10 in parallel with the data electrodes 10, and the side surfaces 11 a between the partition walls 11 and the surface of the insulator layer 9 are provided with phosphor layers 12. Are provided, thereby constituting a back panel.
[0006]
The substrate 1 and the substrate 8 are opposed to each other with a minute discharge space interposed therebetween so that the scan electrode 2 and the sustain electrode 3 are orthogonal to the data electrode 10, and the periphery thereof is sealed. In the space, one of helium, neon, argon, and xenon or a mixed gas is sealed as a discharge gas. The discharge space is divided into a plurality of sections by the partition walls 11, so that a plurality of discharge cells 13 where the intersections of the display electrodes 4 and the data electrodes 10 are located are provided. The phosphor layers 12 are sequentially arranged for each color so as to be blue.
[0007]
As shown in FIG. 7, the electrode arrangement of the panel main body has a matrix configuration including M rows × N columns of discharge cells, and M rows of scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged in the row direction. In the column direction, N columns of data electrodes D1 to DN are arranged.
[0008]
[Problems to be solved by the invention]
By the way, the dielectric layer in this type of plasma display device is formed by applying a dielectric paste made by kneading a glass frit, a binder resin, an organic solvent, etc. onto a substrate, drying the paste, and then heating the dielectric paste. By firing, the binder is removed and the glass frit is melted to form a dielectric layer. In firing this dielectric paste, it is desirable to burn the binder resin to completely remove the binder and reduce the generation of residual carbon and bubbles.
[0009]
However, conventionally, in forming a dielectric layer of a plasma display device, oxygen necessary for burning the binder resin is supplied only to the surface of the coating film, and the binder resin in the film is thermally decomposed in a state of insufficient oxygen. For this reason, residual carbon tends to remain in the film, and most of the air contained in the film is nitrogen that does not contribute to combustion, and thus remains in the film even after completion of debinding, resulting in micro bubbles. These residual carbons and microbubbles have the problem of deteriorating the pressure resistance and transmittance of the panel.
[0010]
The present invention has been made in view of such a problem, and an object of the present invention is to improve the transmittance of a dielectric layer and obtain a panel having excellent withstand voltage characteristics.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention first applies a dielectric paste having a binder resin and a glass frit, and forms a dielectric layer by firing. And then firing the dielectric paste to form a dielectric layer.
[0012]
Thereby, by replacing the air contained in the dielectric paste used for forming the dielectric layer with oxygen, the combustion of the binder resin is promoted by the oxygen present in the coating film at the time of firing, which is generated due to the lack of oxygen. Therefore, the amount of residual carbon can be reduced, and nitrogen that does not contribute to combustion is not contained. Therefore, microbubbles derived from nitrogen can be reduced, and a dielectric having few film defects can be formed. As a result, it becomes possible to manufacture a panel having excellent withstand voltage characteristics and transmittance.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention comprises a pair of front and rear substrates disposed to face each other such that a discharge space partitioned by a partition is formed between the substrates, and a discharge partitioned by the partition. A plurality of electrodes arranged on the substrate so that a discharge occurs in the space, a dielectric layer formed on the substrate so as to cover the electrodes, and a phosphor layer formed on the back-side substrate and emitting light by the discharge; In the method of manufacturing a plasma display device having a, when applying a dielectric paste having a binder resin and a glass frit, and forming a dielectric layer by baking, first, air present in the dielectric paste with oxygen and And then firing the dielectric paste to form a dielectric layer.
[0014]
According to a second aspect of the present invention, in the first aspect, the dielectric paste is formed by arranging a dielectric paste previously processed in a sheet shape on a substrate.
[0015]
Hereinafter, a method for manufacturing a plasma display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3, the same parts as those shown in FIGS. 4 to 6 are denoted by the same reference numerals.
[0016]
In the front panel of the plasma display device according to the present invention, first, after a display electrode 4 is formed on a substrate 1, the display electrode 4 is covered with a dielectric layer 6, and a protective film 7 made of MgO is formed on the surface of the dielectric layer 6. Is formed.
[0017]
The dielectric layer 6 is formed by applying a dielectric paste containing a lead-based glass frit and a binder resin by screen printing, and then baking the same at a predetermined temperature for a predetermined time, for example, 560 ° C. for 20 minutes to obtain a predetermined layer thickness. (About 20 μm). Examples of the dielectric paste containing the lead-based glass frit include PbO (70 wt%), B ₂ O ₃ (15 wt%), SiO ₂ (10 wt%), Al ₂ O ₃ (5 wt%), and a binder resin. (A solution of 10% ethyl cellulose in α-terpineol). Here, the binder resin is obtained by dissolving the resin in an organic solvent. In addition to ethyl cellulose, an acrylic resin can be used as the resin, and butyl carbitol can be used as the organic solvent. Further, a dispersant (for example, glycerol trioleate) may be mixed in such a binder resin.
[0018]
First, in the present invention, a dielectric paste is applied to form a dielectric paste film 20, as shown in FIG. The dielectric paste used here is made by kneading a glass frit, a binder resin, an organic solvent, and the like. Since the dielectric paste contains air during the production of the dielectric paste, the applied dielectric paste film is used. 20 also contains air 21.
[0019]
Thereafter, oxygen-enriched gas is supplied to the dielectric paste film 20 to replace the air 21 in the dielectric paste film 20 with oxygen 22 as shown in FIG. As shown, baking is performed while supplying oxygen 23. As a result, the combustion of the binder resin in the film is promoted by the substituted oxygen 22 in the dielectric paste film 20, the residual carbon remaining by the combustion is reduced, and 100% of the oxygen 22 is consumed in the combustion. The generation of bubbles can be reduced. Therefore, the reduction of the residual carbon and the minute bubbles can improve the transmittance of the dielectric and the withstand voltage characteristics.
[0020]
That is, in the present invention, the air 21 dissolved in the dielectric paste film 20 used for forming the dielectric layer is replaced with oxygen 22 and then fired, and the transmittance of the dielectric layer is improved, A panel having excellent characteristics can be manufactured.
[0021]
In the case where the air 21 dissolved in the dielectric paste film 20 is replaced with oxygen 22, it is not possible to completely replace the air 21, but it is also possible to replace a part of the air 21 by burning the binder resin in the dielectric paste film 20. Can be promoted, the amount of residual carbon remaining can be reduced, and the generation of microbubbles can be reduced as compared with the related art. Further, the application of the dielectric paste film 20 may be performed by disposing a dielectric paste previously processed into a sheet shape on a substrate.
[0022]
【The invention's effect】
As is apparent from the above description, according to the method for manufacturing a plasma display device according to the present invention, the combustion efficiency of the binder resin can be increased by oxygen introduced into the film and replaced with air in the film, so that the remaining Since carbon can be reduced and microbubbles derived from nitrogen can also be reduced, the transmittance of the dielectric can be improved, and a panel having excellent withstand voltage characteristics can be easily manufactured.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which a dielectric paste film is formed in a method of manufacturing a plasma display device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing a state of a dielectric paste film after oxygen substitution. FIG. 3 is a cross-sectional view showing a state of firing a dielectric paste film. FIG. 4 is a perspective view showing a part of a panel structure of a plasma display device, which is cut away. FIG. 5 is cut along line AA in FIG. FIG. 6 is a sectional view taken along line BB of FIG. 4. FIG. 7 is a wiring diagram showing an electrode arrangement of the device.
1, 8 Substrate 2 Scanning electrode 3 Sustain electrode 2a, 3a Transparent electrode 4 Display electrode 5 Black stripe 6 Dielectric layer 7 Protective film 9 Insulator layer 10 Data electrode 11 Partition wall 12 Phosphor layer 20 Dielectric paste film 21 Air 22 Oxygen

Claims (2)

A pair of front and rear substrates disposed opposite to each other such that a discharge space partitioned by a partition is formed between the substrates, and a plurality of substrates disposed on the substrate such that discharge occurs in the discharge space partitioned by the partition. And a dielectric layer formed on the substrate so as to cover the electrode, and a phosphor layer formed on the back-side substrate and emitting phosphor by discharge. When a dielectric paste having a frit is applied and baked to form a dielectric layer, first, air present in the dielectric paste is replaced with oxygen, and then the dielectric paste is baked. A method for manufacturing a plasma display device, comprising forming a layer. 2. The method of manufacturing a plasma display device according to claim 1, wherein the dielectric paste is applied by disposing a dielectric paste previously processed into a sheet shape on a substrate.

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