JPH03226942A - Gas discharge panel - Google Patents

Abstract

PURPOSE:To lengthen a service life of a gas discharge panel and improve its reliability by forming a lead oxide-containing dielectric layer on a soda glass substrate and forming a conductor such as a cathode, etc., on it. CONSTITUTION:If a cathode group 4 are formed using a soda glass substrate 1 on which a lead oxide-containing dielectric layer 11 is formed by a simple method such as a thick film printing method, bonding of Na ion and oxygen of lead oxide does not occur and lead is not precipitated because the surroundings of the conductors such as the cathode group 4 are the same lead glass-based dielectric. Consequently, current leakage owing to insulation inferiority between the adjacent cathodes does not happen. In this way, not lighting cells or operational voltage rise are prevented and a gas discharge panel able to operate stably for a long duration is obtained.

Description

[Detailed description of the invention]

[INDUSTRIAL APPLICATION FIELD 1] The present invention relates to a gas discharge panel for displaying characters and images, which is constituted by a discharge display element that utilizes visible light or ultraviolet light generated by gas discharge.

[Prior art 1] The conventional structure of a gas discharge panel in which discharge cells are formed using a soda glass substrate is disclosed in Japanese Patent Laid-Open No. 60-1015, for example.
It is described in No. 94. FIG. 4 is a diagram showing the structure of the gas discharge panel shown in the above-mentioned known example. In the figure, reference numeral 1 denotes an insulating substrate made of soda glass, on which are formed a cathode lead 2, a resistor 3, an N1 cathode conductor 4, and a dielectric layer 5 for insulation. 7 is a translucent face plate on which an anode 8 is formed. Reference numeral 9 denotes a spacer for forming a discharge space, which is a stack of thin soda glass plates with holes formed by chemical etching to match the shape of the discharge cell. FIG. 5 shows other conventional examples, such as JP-A-53-142.
This figure shows a panel structure in which a display matrix is constructed using only two types of electrodes using two glass plates as described in No. 865. 1 is an insulating substrate made of soda glass or the like, and a cathode 15 is provided on the substrate so as to intersect with the anode 8, and then a dielectric barrier 16 is formed parallel to the anode 8 to form a discharge space. 7 is a translucent face plate on which an anode 8 is provided. [Problems to be Solved by the Invention] In the above-mentioned prior art, for example, as shown in FIG. A dielectric layer 5 is provided for use. These panel parts are formed by, for example, a thick film printing method. A dielectric layer for a typical glass substrate used in the thick film printing method uses a dielectric material containing lead oxide, which can be operated at a low temperature of 600° C. or lower, since there are restrictions on the working temperature. However, in the gas discharge panel having the conventional structure, defects such as unlit cells and an increase in driving voltage occurred after the operating time exceeded about 4,000 hours. The reason for this is that the volume resistance of soda glass is about 10' smaller than that of lead glass. Therefore, when a voltage for driving the panel, for example a negative pulse, is applied to the cathode lead 2, Na ions in the soda glass move along with the electric field and combine with oxygen in lead oxide in the dielectric layer at the interface. As a result, lead components are precipitated at the interface between lead glass and soda glass between adjacent cathodes. This lead component becomes dendritic and spreads between adjacent cathodes, causing a short circuit and an insulation failure. 3- An object of the present invention is to eliminate this poor insulation between cathodes with a simple configuration. [Means for Solving the Problems] The above object is achieved by forming a dielectric layer containing lead oxide on a soda glass substrate, and forming a conductor such as a cathode lead, a resistor, etc. thereon. [Function] If a cathode group is formed using a soda glass substrate according to the present invention and a dielectric layer containing lead oxide formed thereon, the periphery of the conductor such as the cathode group is the same lead glass dielectric, so Na
There is no bond between ions and oxygen in lead oxide, so buttons do not precipitate. Therefore, there is no occurrence of current leakage due to poor insulation between adjacent cathodes. This eliminates unlit cells and increases in drive voltage, resulting in a gas discharge panel that operates stably for a long time. [Example] The present invention will be described in detail below. FIG. 1 is a sectional view showing a discharge cell structure of a gas discharge panel according to the present invention. In the figure, 1 is an insulating substrate made of soda glass, and a dielectric layer 11 containing lead oxide according to the present invention is applied to the surface of the insulating substrate 1. The dielectric layer 11 is formed by, for example, a thick film printing method. As this dielectric paste, it is desirable to use a crystalline glass paste that will not dissolve again during firing of the cathode group etc. that will be formed later. For example, E Nis L (E S L)
M4023B manufactured by Du Pont, 974o, 9741 manufactured by Du Pont, etc. may be used. In addition to the thick film printing method, the dielectric layer 11 may be formed by, for example, a spraying method, or dipping. On the dielectric layer 11, a cathode lead 2, a resistor 3, and a Ni cathode conductor 4 are formed by a thick film printing method, and further, the entire surface except the Ni cathode conductor 4 is covered with an insulating dielectric layer 5. ing. For the dielectric layer 5, a glass paste containing lead oxide is used. 6 is a cathode; for example, by printing barium azide and thermally decomposing it in vacuum, a barium cathode can be obtained. 7 is a translucent face plate made of soda glass or the like;
is provided. Reference numeral 9 designates a spacer for forming a discharge cell, which is a stack of thin sheets of soda glass about 0.2 mm thick with holes made by chemical etching. An auxiliary anode 10 is provided on one of the spacers by printing and firing Ni paste, for example. The auxiliary anode 10 is
They are arranged to intersect with the cathode leads 2 to form a matrix. Reference numeral 12 denotes an auxiliary discharge space whose cross section is, for example, 0.3 mm in width and 0.2 mm in height. Auxiliary discharge is performed between the auxiliary anode 10 provided at one end of this space 12 and the barium cathode 6. 13 is a display discharge space, for example, in the case of a cell pitch of 1 mm, the cross section is 0.8 mm and is 0.8 mm in the vertical direction to the translucent face plate 7.
．． Form with a length of 5 to 3 mm. The wall surface of the display discharge space is coated with a phosphor 14, which emits ultraviolet light generated by display discharge between the anode 8 and the barium cathode 6. The gas discharge panel configured as described above further has Xe, Ne, He, K, and
It is completed by enclosing one or more rare gases such as r or a mixture of two or more. In the panel with this configuration, the cathode group is formed at the interface between the same lead glass dielectric layers, so the Na
Bonding with ions is eliminated, and insulation defects between adjacent cathodes do not occur even after long-term operation). FIG. 2 is a cross-sectional perspective view showing the entire gas discharge panel described in FIG. 1. Color display can be achieved by forming a dielectric layer 11 according to the present invention on an insulating substrate 1 and coating each cell with a phosphor that emits red, green, and blue light in one color. FIG. 3 is a perspective view of a panel structure showing another embodiment according to the present invention. The figure shows a display matrix panel, for example, for a data display, which is constructed using two glass plates and two types of electrode groups arranged so as to intersect with each other. A body layer 11 is formed thereon. Insulation failure occurs at the interface between different types of glass, and if a panel is manufactured using the structure of the present invention,
As described above, even if the device is operated for a long time, no insulation failure occurs between adjacent cathodes. 7- Although the above embodiments have been described with respect to the cathode group of the insulating substrate, the same effect can be obtained if the dielectric layer according to the present invention is provided on the anode group as well.

【Effect of the invention】

According to the present invention, a dielectric layer containing lead oxide is formed on a soda glass substrate by an extremely simple method such as thick film printing, and a conductor such as a cathode is formed on the dielectric layer, thereby forming a gas discharge panel. Longer lifespan and improved reliability are achieved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a discharge cell portion of a gas discharge panel according to an embodiment of the present invention, FIG. 2 is a cross-sectional perspective view showing the entire structure of the gas discharge panel of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of a discharge cell portion of a conventional gas discharge panel, and FIG. 5 is a cross-sectional perspective view of another conventional gas discharge display panel. Explanation of symbols 1...Insulating substrate, 2...Cathode lead, 3...Resistor, 4Ni cathode conductor, 5...Dielectric layer, 6...Barium cathode, 8- 7...Transparent face plate , 8... Anode, 9... Spacer,
10... Auxiliary anode, 11... Dielectric layer according to the present invention,
12... Auxiliary discharge space, 13... Display discharge space, 14
... Firefly No. 4 Fig. 6

Claims (1)

[Claims] 1. In a gas discharge panel equipped with at least one type of anode group, at least one type of cathode group, and two insulating plates made of soda glass, a dielectric material containing lead oxide is placed on the surface of the insulating plate made of soda glass. A gas discharge panel characterized in that a layer is formed, a group of conductors is formed on the layer, and a part of the group of conductors is further covered with a dielectric layer containing lead oxide.