JPS5816433A - Manufacture of gas discharge panel - Google Patents

Abstract

PURPOSE:To manufacture a display panel of high quality with stability and good yields by forming a gas discharge space with a spacer coated with glass of a lower melting point than that of the glass for panel sealing. CONSTITUTION:In order to form a spacer 16, glass powder of a low melting point having a nearly equal coefficient of thermal expansion to the glass substrates 1 and 11 and besides having a lower melting point than the softening point of sealing glass is applied to both sides of a micro-sheet glass 21 used for a thin spacer, for example, up to the thickness of 20-100mum by means of a spray method and such so as to coat a glass layer 22 having a low melting point being fused by heating. Said micro-sheet glass 21 is cut to a proper shape and said cut-out spacer 16 is arranged on a fixed spot by adhesion with adhesives such as ethylcellulose. Thereafter sealing glass is temporarily fired to be formed into sealing material layers 5 and 15. Tereby a display panel of high quality having a good discharge characteristic can be manufactured with good yields.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a gas discharge panel, and more particularly to a method of manufacturing a gas discharge panel that can form a gas discharge space free from discharge display defects.

Gas discharge panels for flat panel displays, generally known as plasma display panels, are made of gold (mu) on a glass substrate.
A pair of panels in which a plurality of conductive electrodes made of tin oxide (8nO) are disposed, and a dielectric layer made of low melting point glass, alumina, etc. is deposited on the electrodes. The substrates are placed facing each other across a predetermined gas discharge space, and the [
After the enclosure is sealed with sealing glass, the gas discharge space is once evacuated, and an appropriate discharge gas is filled in the space. Since the discharge characteristics of the gas discharge spring configured in this way vary greatly depending on the gap length of the discharge space mentioned above, it is necessary to keep the facing gap of the panel substrate constant at each location. In order to prevent the board from deforming due to the pressure difference between the inside and outside, spacers formed by scribing small pieces of a glass plate such as Mikeyo sheet glass are arranged at various places between the panel boards. However, when spacers are arranged as described above and the combined panel substrates are hermetically sealed with sealing glass to form a predetermined clear gas discharge space, In the process of evacuating the gas discharge space, the spacer is compressed by the surfaces of both panel substrates, which tends to cause cracks at the edges of the spacer, and the cracked pieces scatter into the gas discharge space, causing gas There was a drawback that the discharge display was impaired. Therefore, in order to eliminate the above-mentioned drawbacks, a spacer made of sapphire with high mechanical strength is used, or the spacer is directly deposited with crystallized glass on a predetermined location on the electrically conductive layer using a printing method. However, the former method is expensive, resulting in high costs, and the latter method is difficult to obtain an accurate thickness, making it difficult to apply to a dot display matrix type display panel.

Therefore, an object of the present invention is to overcome the above-mentioned conventional drawbacks by forming a gas discharge space using a spacer coated with a low melting point glass that is lower than the melting point of glass for panel sealing, thereby achieving high quality display. The present invention provides a new manufacturing method that allows gas discharge panels to be manufactured stably and with high yield.

Embodiments of the manufacturing method of the present invention will be described in detail below with reference to the drawings.

FIGS. 1 to 8 are a sectional view and a perspective view of essential parts showing an embodiment of the method for manufacturing a gas discharge panel according to the present invention in the order of steps.

First, as shown in FIG.
II number of X electrodes 2 made of a multilayer structure such as Ou) or tin oxide (SaO2) and the Ylllt pole ν are arranged in a direction perpendicular to each other. Then, dielectric layers 8 and 13 made of, for example, low melting point glass are deposited on the substrates l and U on which the electrodes 2 and 11 are arranged, and the periphery of each of the substrates l and 11 is scheduled to be sealed. After a paste-like sealing glass is deposited on the site, a spacer 16 is provided on the dielectric layer of the one glass substrate 1, for example 11, or at a predetermined location to define the gap between the gas discharge spaces. In the present invention, as this spacer 16, in order to eliminate the drawbacks of conventional spacers, as shown in FIG.
A low melting point glass powder having a coefficient of thermal expansion approximately equal to 1 and a melting point lower than the softening point of the above-mentioned sealing glass is applied to a thickness of, for example, 20 to 100 μm by a spray method, and heated and melted. and coated with low melting point glass Pwυ,
The micro sheet glass is cut into the same shape as a conventional spacer, and the spacer 16 cut out as shown in the figure is adhesively arranged at the above-mentioned predetermined location using an adhesive such as ethyl cellulose. After that, the sealing glass was heated to about 850 ml.
Temporary firing is performed at about 0.degree. C. to form the sealing material layer 5 and the layer.

In this process, the adhesive that adhered the spacer is burnt out, and the low melting point glass layer ρ of the spacer 16 melts and covers the entire outer circumferential surface of the spacer, and at the same time adheres to the binding layer. be done. Next, surface layers 4 and 14 made of MgO are appropriately deposited on the upper surfaces of each of the dielectric layers 3 and the lugs.

However, a pair of panel component substrates 100 and 110 configured as shown above are connected to their X electrode 2 and 'Y electrode! ! I4
12 are orthogonal to each other, and both of the sealing material layers 6 and 15 are arranged facing each other so that they are in contact with each other, and the combined body is heated in an evacuated heating furnace to separate each of the sealing material layers 6 and 15. The image forming substrate 100, 1 is melted as shown in FIG.
If a display panel having a gas discharge space ν with a predetermined gap is constructed by airtightly sealing the gap between the spacers 100 and 100 and forming a display panel having a gas discharge space ν with a predetermined gap depending on the spacer ratio, the spacer feeling will be strong on the image forming substrate 100 and 110 surfaces in the sealing process. Even under pressure, the low melting point glass layer 4 covering the outer peripheral surface of the spacer remains in a molten state, so the occurrence of cracks is greatly reduced.

Further, even if a crack occurs, its fragments will not be scattered into the gas discharge space ν, making it possible to form a display panel with no display defects with good reproducibility. Furthermore, during the subsequent evacuation and baking process of the display panel, the low melting point glass layer n on the outer periphery of the spacer 16 interposed in the panel is softened. Even if there is a gap, the gap is made uniform and constant by the action of atmospheric pressure. Therefore, by filling the gas discharge space ν with an appropriate discharge gas after such a gate step, a gas discharge panel with good discharge characteristics can be obtained.

In the above embodiment, after the spacer ratio is placed at a predetermined location on the dielectric layer B of the glass substrate H, the surface layer 14 made of MgO is selectively deposited on the dielectric layer B. As explained in the example, after the surface layer 14 is formed on the dielectric layer U, the surface layer 14 is formed on the dielectric layer U.
The spacer may be arranged through the spacer.

As is clear from the above description, according to the manufacturing method of the present invention, the inconvenience that the edges of the spacer defining the gap between the gas discharge spaces crack and scatter into the gas discharge space can be eliminated, and the The advantage of this method is that it can be applied to the production of various gas discharge display panels because it can maintain the same dimensions with high precision, making it possible to produce high-quality display panels with no display defects and good discharge characteristics at a lower yield. has.

[Brief explanation of drawings]

FIGS. 1 to 8 are a sectional view and a perspective view of essential parts showing an embodiment of the method for manufacturing a gas discharge panel according to the present invention in the order of steps. In the figure, 1.11 is a glass substrate, 2.12 is an electrode, and 3
．． 13 companies chielectric layer, 4, lj is surface layer, 6*L
5Fi sealing material sealing, 16 is a spacer, 17 is a gas discharge space, 4th is a micro sheet gas lamination for spacer, and the low melting point is low melting point Fig. 1 00 Sub Fig. 2 Fig. 3

Claims (1)

[Claims] A method for producing a gas discharge panel having a configuration in which a pair of panel component substrates each supporting a plurality of electrodes whose inner surfaces are coated with a Kll electric layer are arranged facing each other with a predetermined gas discharge space in between. Microphone p for spacer formed between body layers by coating low melting point glass on the surface in advance
Method 0 for manufacturing a gas discharge panel, characterized in that the gas discharge space is defined by interposing spacers cut out from sheet glass.