JPH0410330A - Gas discharge display device and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent deterioration of the display quality to be caused by impact of ion on the surface of a dielectric layer by forming a MgO protecting layer, which is mainly composed of MgO, on the surface of the dielectric layer. CONSTITUTION:A third electrode 5 as a trigger electrode is formed on a base glass 4 by thick-film printing, and a dielectric layer 6 is formed thereon. Furthermore, a MgO protecting layer 8 is formed on the dielectric layer 6 by thick-film printing the MgO paste, which is mainly composed of MgO, and multiple cathode electrodes 7 are formed on the MgO protecting layer 8. On the other hand, transparent electrodes 2 as anode electrodes are formed by evaporation in the lower face side of a window glass 1 so is to be transverse to the cathode electrodes 7, and are separated to each discharge cell, and bulkheads 3 for providing discharge spaces of the discharge cells are formed by thick-film printing in parallel with the transparent electrodes 2. The MgO protecting layer 8 on the dielectric layer 6 protects the surface of the dielectric layer from the impact of ion to restrict lowering of display quality.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a gas discharge display device and a gas discharge display device that protects a dielectric layer formed on the third layer to extend the service life and improve the display quality. This relates to a manufacturing method.

[Conventional technology]

FIG. 2 is a perspective view showing the structure of a conventional gas discharge display device, and l in FIG. 2 is a rectangular window glass. On the lower surface side of the window glass 1, a plurality of transparent electrodes 2 as anode electrodes are formed by vapor deposition at predetermined intervals in a direction perpendicular to a cathode electrode 7 (described later) (in the longitudinal direction of the window glass 1 in FIG. 2). ing.

A plurality of partition walls 3 are formed in parallel with the transparent electrode 2 on the lower surface of the window glass 1 by thick film printing. This partition wall 3 is for separating each discharge cell and providing a discharge space for each discharge cell.

On the other hand, a third electrode 5 as a trigger electrode is formed on the base glass 4 by thick film printing, and a dielectric N6 is formed on top of the third electrode 5 by thick film printing.

The plurality of cathode electrodes 7 are formed on the dielectric layer 6 by thick film printing, and the cathode electrodes 7 and the third electrode 5 are insulated by the dielectric layer 6.

The above-mentioned window glass 1 and Haas glass 4 are combined and sealed in a high vacuum, and the inside of the seal is replaced with a rare gas.

Here, by the triggering action of the third electrode 5, an AC type discharge is generated on the surface of the dielectric layer 6, and the excited molecules generated here cause a discharge between the anode and the cathode, that is, the transparent electrode 2.
The DC discharge between the electrode 7 and the cathode electrode 7 is stabilized without any delay in discharge.

[Problem to be solved by the invention]

However, in the gas discharge display device having the above configuration, since the discharge occurs on the surface of the dielectric layer 6, due to ion bombardment,
There is a problem in that the surface of the dielectric layer 6 deteriorates, resulting in poor display quality. Therefore, in AC type discharge display devices, a MgO film is generally formed on the surface of the dielectric layer 6 by sputtering, etc. Protects body layer 6.

However, when forming a thin film by sputtering or the like, it is difficult to uniformly apply the film over a large area, which is one of the reasons for the high cost of AC type discharge display devices.

The invention of claim I provides a gas discharge display device which solves the problem of the above-mentioned prior art, which is that display quality deteriorates due to deterioration of the surface of the dielectric layer due to ion bombardment.

In addition, the invention of claim 2 is a method for manufacturing a gas discharge display device that solves the problems of the prior art, including the difficulty in uniformly depositing a dielectric layer over a large area and the high manufacturing cost. The present invention provides a method.

[Means to solve the problem]

In order to solve the above problem, the invention of claim 1 is a gas discharge display device in which an MgO protective layer containing MgO as a main component is formed on the surface of the dielectric layer.

Moreover, in order to solve the above-mentioned problem, the invention of claim 2 includes:
In a method for manufacturing a gas discharge display device, an MgO paste made by mixing MgO powder and a glass component at a predetermined volume ratio is thick-film printed on a dielectric layer.
This method introduces a process of forming an NGO protective layer by forming a gO protective film or applying an organic metal solution to a dielectric layer and thermally decomposing it.

[Function] According to the invention of claim 1, since the gas discharge display device is configured as described above, the dielectric layer-like MgO protective layer protects the surface of the dielectric layer against ion bombardment, and the display quality is improved. The above-mentioned problem can be eliminated.

Further, according to the invention of claim 2, since the above steps are introduced in the method for manufacturing a gas discharge display device, thick film printing technology or the like or organic metal solution is applied to the dielectric layer after the formation of the dielectric layer. By forming the MgO protective layer by coating and thermal decomposition, it becomes possible to uniformly form the MgO protective layer on the dielectric layer, thereby eliminating the above-mentioned problems.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of a gas discharge display device and a method for manufacturing the same according to the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the structure of a gas discharge display device manufactured by the method of manufacturing a gas discharge display device of the present invention.

In FIG. 1, the same parts as in FIG. 2 will be described with the same reference numerals. A third pole 5 as a trigger electrode is formed on the base glass 4 by thick film printing, and a dielectric layer 6 is formed on the third pole 5 as a trigger electrode.
is formed.

Further, on the dielectric layer 6, MgO, which is a feature of the present invention, is
The protective layer 8 is made of MgO paste (i.e., MgO paste (i.e., Mg
O powder is converted into glass powder whose main component is metal oxide.
Mix at a volume ratio of ~60% and apply the vehicle for thick film paste (organic polymer dissolved in a solvent to form a liquid, containing a small amount of additives to improve printability)) to form a thick film. It is formed by printing or by applying a solution of an organic magnesium compound (for example, the main component is magnesium salt of propionic acid), drying, and heat treatment (thermal decomposition).

A plurality of cathode electrodes 7 are formed on this carbon dioxide protective layer 8 .

On the other hand, on the lower surface side of the window glass l, a transparent electrode 2 as an anode electrode is formed by vapor deposition in a manner perpendicular to the cathode electrode 7, and a partition wall for separating each discharge cell and providing a discharge space for the discharge cell. 3 is formed in parallel with the transparent electrode 2 by thick film printing.

The window glass 1 thus formed and the base glass 4 are put together, sealed in a high vacuum, and the inside is replaced with a rare gas.

In the gas discharge display device thus formed, by causing a discharge to occur between the selected transparent electrode 2 and the cathode electrode 7 using the third electrode 5 as a trigger electrode, light is emitted between the two electrodes, and the window glass 1 is illuminated. Information can be displayed externally.

In such a gas discharge display device, M is shown in Table 1 below.
The results of the life test are shown when the content of gO powder is 60%, when a solution of magnesium salt of propionic acid is used to form an MgO protective layer, and when there is no MgO protective layer.

<Table 1> Regarding MgO paste, the effect is recognized even when the content of MGO is 10% or less, but when the content is 30% or less, the protective effect suddenly decreases.

Moreover, if it exceeds 60%, the adhesive strength of the paste to the glass substrate will decrease and the printability of the cathode electrode will deteriorate.

For the above reasons, the content of MgO powder is 30% to 60%.
%, and the particle size is preferably 1 to 10 μm, which is equivalent to the glass component.

〔Effect of the invention〕

As explained in detail above, according to the invention of claim 1,
Since the MgO protective layer is formed on the dielectric layer, the dielectric layer is protected against ion bombardment during discharge between the anode and cathode electrodes, thereby preventing deterioration of display quality and prolonging the service life. can do.

According to the second aspect of the invention, a protective layer of MgO is formed on the dielectric layer by thick film printing of MgO paste formed by mixing MgO powder and a glass component at a predetermined volume ratio, or We applied a magnesium organic compound metal solution to the dielectric layer and formed it by thermal decomposition.
The protective layer can be uniformly formed on the dielectric layer, and manufacturing costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a gas discharge display device manufactured by the method of manufacturing a gas discharge display device of the present invention, and FIG. 2 is a perspective view of a conventional gas discharge display device. 1...Window glass, 2...Transparent electrode, 3...
Partition wall, 4... Base glass, 5... Third electrode, 6...
...Dielectric layer, 7... Cathode electrode, 8...-go
protective layer. 1. Window〃°Last 4: To -21"Last 5.j

Claims (3)

[Claims] (1) (a) A dielectric layer formed on the base glass via a third electrode that functions as a trigger electrode, and (b) A dielectric layer formed on this dielectric layer to protect this dielectric layer from ion bombardment. (c) A plurality of cathode electrodes formed on the MgO protective layer; (d) The space facing the base glass is evacuated and replaced with a rare gas, and information is transmitted to the outside. a window glass for display; (e) a plurality of electrodes disposed on the lower surface of the window glass so as to face orthogonally to the cathode electrode, and between which a discharge is caused by the triggering action of the third electrode; A gas discharge display device comprising: an anode electrode; (2) (a) forming a dielectric layer after forming a third electrode on the base glass; (b) incorporating MgO powder and a glass component in a predetermined volume ratio on the dielectric layer; MgO paste with thick film printing
(c) forming a plurality of cathode electrodes on the MgO protective layer; (c) forming a MgO protective layer on the MgO protective layer; d) forming a plurality of transparent electrodes to serve as anode electrodes in a direction perpendicular to the cathode electrodes on the lower surface of the window glass facing the base glass; (e) sealing the space between the window glass and the base glass in a vacuum; and replacing the inside with a rare gas. (3) In the above MgO paste, 1 to 10μ MgO powder is added to glass powder whose main component is metal oxide by 30 to 60%.
3. The method of manufacturing a gas discharge display device according to claim 2, wherein the mixture is mixed with a vehicle for film thickness paste to form a paste.