JPH01183029A - Manufacture of gas discharge panel - Google Patents

Abstract

PURPOSE:To improve the efficiency of installing spacers by printing an adhesive printing paste at an electrode clearance on one side substrate, making numerous ball-form spacers more than the finally operating spacers stay and adhere on the substrate, and after that, removing the spacers which could not adhere to the substrate. CONSTITUTION:Patterns of electrodes 2 are produced on a substrate 1, a dielectric layer 3 is printed thereon, and baked up. On the substrate 1 at one side, pedestals 5 to hold spacers stably are produced in specific patterns by using a printing mask, at the positions avoiding the electrodes 2 and avoiding electrodes 7 on the opposite substrate. After that, spacers more than the numbers of pedestals 5 are scattered evenly on the substrate. When the substrate is inclined in such a condition, ball-form spacers 4 not to contact to the pedestals or contact slightly are all removed, and only the spacers 4 ridden on the pedestals 5 stably are remained. Then, by baking the spacers 4 on the pedestals 5 together with the substrate 1, the adhesive layer on the substrate 1 is melted and fixed to envelope the spacers 4.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a method of manufacturing a gas discharge panel, and relates to an efficient method of manufacturing a gas discharge panel in which a spherical support is installed to maintain a constant gap between two opposing substrates while avoiding the discharge point on the substrate. In order to obtain a method, a sticky printing paste is printed in the gap between the electrodes on one of the substrates, and a larger number of spherical spacers than the final number of spacers are retained on the substrate on average, In this method, the spherical spacers are adhered onto the printing paste, and then the spherical spacers that could not be adhered are removed to form a panel.

- [Industrial Application Field] This invention relates to a method of manufacturing a gas discharge panel.

More specifically, the present invention relates to a new method of installing spacers for setting the discharge gap of the panel.

[Conventional technology]

Generally, in a gas discharge panel, a gas space is defined by interspersing a plurality of spacers between a pair of opposing electrode substrates.

Conventionally, the method of installing this spacer was
166, in which a spacer is adhesively fixed onto a dielectric layer for electrode insulation using water glass is known.

However, with this method, each spacer must be placed and fixed by hand, which requires a large amount of man-hours and time, resulting in high manufacturing costs.Also, work errors such as misalignment of spacers are likely to occur, and the panel This was an inconvenience in terms of quality.

In addition, in the conventional method, it is necessary to use a spacer with a relatively large shape, for example, a spacer with a size of 0.5 mm square. ), combined with the use of water glass, had the disadvantage that there were many defective points that did not emit light.

Furthermore, in order to reduce the weight of the entire panel, the substrate 1 is required to be made thinner, and in order to maintain the discharge gap, a higher density of spacers is required, which cannot be met by conventional methods.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION In view of the above-mentioned conventional situation, an object of the present invention is to provide an efficient method for installing a spacer to maintain a constant gap between two opposing substrates while avoiding discharge points on the substrates.

[Means for solving problems]

In order to solve the above-mentioned problems, in the present invention, a sticky printing paste is printed in the gap between the electrodes on one of the substrates, and a larger number of spherical spacers than the final number of spacers are placed on the substrate on average. After the spherical spacers are allowed to adhere to the printing paste, the spherical spacers that could not be adhered are removed to form a panel.

[For production]

When the above method is applied, on one of the substrates 1 on which the spacers are arranged, a layer for adhering the spherical spacers, that is, a pedestal 5, is placed at the spacer arrangement position avoiding the electrode with the precision of thick film printing, and then the required number of If a larger number of spacers are allowed to stay on the entire surface of the substrate, they will ride on the pedestal 5 or the pedestal 5.
The spherical spacer that comes into contact with the center of the gas discharge panel is captured by the pedestal 5, and its position as a spacer can be determined. I can support you.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings, with reference to an embodiment applicable to an AC-driven gas discharge panel in which the electrode surface is coated with a dielectric layer.

FIG. 1 is a sectional view showing a spacer installed on a gas discharge panel by the method of the present invention. 1 and 6 are substrates,
2 and 7 are electrodes, 3 and 8 are dielectric layers, 4 is a spacer, and 5 is a fired part of the adhesive paste to which the spacer 4 is attached, which is called a pedestal. 9 is a gas space, and 10 is a seal for sealing in discharge gas.

FIG. 2 is a plan view of the substrate 1 in which the spacer pedestal 5 of the present invention is printed on the dielectric layer 3 covering the electrode 2 on the substrate 1, and FIG. 3 is a plan view of the substrate 1. FIG. 5 is a cross-sectional view showing a printed spacer pedestal 5. FIG.

FIG. 4 shows the spherical spacer 4 attached to the printed base 5 and baked and hardened. In FIGS. 2 and 4, horizontal dashed lines Yl, Y2.
. . . indicate the positions through which the center lines of the electrodes 7 pass after they are combined as a panel.

P, which is one of the intersections between the electrodes 2 and 7, represents a discharge point, and when discharge occurs, the space at the intersection shines brightly. In Fig. 4, there are 16 such discharge points.

The diameter of the spherical spacer 4 used in the present invention is selected in advance based on the value of the distance between several tens of microns and 300 microns that will serve as the discharge gap.A sphere of a certain size, here an alumina pole with a diameter of 100 microns, is used. ing.

A pattern of electrodes 2 is created on a substrate 1 by photolithography, and a dielectric layer 3 is printed thereon and fired to obtain one substrate 1. A pedestal 5 that stably supports the spacer is placed on one of the substrates 1 in a position that avoids the electrode 2 and also avoids the electrode 7 on the opposite substrate in a predetermined pattern using a printed mask. create. As shown in the spacer layout diagrams in FIGS. 2 and 4, the location where this should be printed is to avoid both electrodes 2 and 7, and to avoid the discharge point P of the cell.
This is the center of the sky, which has completely escaped. A cross-sectional view of the printed pedestal 5 is shown in FIG. 3 together with the substrate 1 and the electrodes 2. (However, in reality, the discharge point can be avoided if only one electrode is avoided, so the worst case scenario is okay.) After this, far more spacers than the number of pedestals 5 are evenly distributed on the substrate, and for a while. When the substrate is tilted using the device, the spherical spacers 4 that do not touch the spacers or touch them only slightly are removed, and only the spherical spacers 4 stably mounted on the pedestal 5 remain on the substrate 1.

In this way, the spacer 4 on the pedestal 5 is placed together with the substrate 1 for about 50 minutes.
When fired at 00 degrees, the adhesive layer on the substrate 1 is depressed by the weight of the spacer 4, and is fused and fixed so as to wrap around the shape of the spacer.

When the substrate is thin and flexible for economical and lightweight purposes, the method of the present invention, which is much more efficient than manual labor, uses the pedestal 5 such that a spacer 4 is provided at each midpoint of every cell P. By increasing the number of , the discharge gap can be made uniform even if the substrate is thin.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and the following modifications and applications are possible. That is, as a modification, in addition to a spherical spacer, a polyhedral spacer, a rectangular parallelepiped, one cylinder, and especially a fiber spacer can also be used.

The material is not limited to the alumina used in the present invention, but is also within the scope of the present invention if it is inorganic and resistant to deformation, such as glass or silica balls.

As an example of application, it is also possible to apply the present invention to a direct current discharge type gas discharge panel in which the electrode surface is not covered with a dielectric layer.

If a colored paste with low reflection is used for this paste, the reflected light from the spacer may be reduced and the contrast may be improved.

Furthermore, if a substance that disappears by firing, such as ethyl cellulose, is used in the paste, it will work as a glue to fix the spacer 4 until firing, but after firing it will evaporate and disappear.
Only the spacers 4 remain on the substrate.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the adhesive layer printed in advance in the discharge gap on one substrate is printed only on the area to be attached to the fixed position of the spacer.
By simply attaching the spacer in a fixed position, and softening and welding the printing paste through a baking process, the spacer can be placed in a position that avoids the electrodes.

The method of the present invention is several times faster than, for example, the conventional method of manually arranging spacers, can be installed at multiple points, and the spacer position and adhesion are uniform. Results are being obtained. In addition, because they are not placed manually, it is now possible to increase the number of spacers, allowing the use of thinner substrates, reducing the weight of the panel, and improving the uniformity of the discharge gap. brightness is improved, and brightness unevenness is clearly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a gas discharge panel with spacers arranged by the method of the present invention, FIG. 2 is a plan view of an example of a spacer pedestal 5 arranged on a substrate 1 by the method of the present invention, and FIG. FIG. 4 is an enlarged sectional view of the spacer pedestal 5 arranged on the substrate 1 by the method of the invention. FIG. 4 is a plan view showing an example of the spherical spacer 4 arranged on the substrate 1 by the method of the invention. In the figure, 1 and 6 are substrates, 2 and 7 are electrodes, 3 and 8 are dielectric layers, 4 is a spherical spacer, 5 is a pedestal, 9 is a gas space, 10 is a seal, and P is one of many discharge points , Yl, and Y2 indicate the center line of the electrode 7.

Claims (1)

[Claims] A pair of substrates (1) having a plurality of electrodes (2) and (7),
(6) are arranged facing each other across a gas discharge space (9), and an adhesive printing paste is applied to one of the substrates (1).
At the same time as printing in the gaps between the upper electrodes (2), a larger number of spherical spacers (4) than the final number to be used are averagely retained on the substrate (1), and the spherical spacers (4) are placed on the printing paste. A method for manufacturing a gas discharge panel, which comprises forming a panel by removing spherical spacers that could not be adhered after adhesion.