JPS61110936A - External electrode type discharge display plate - Google Patents

Abstract

PURPOSE:To keep the yield even when a display capacity is large by setting content of PbO of a low melting-point glass as a dielectric material covering aluminum electrode at 40-50%. CONSTITUTION:A transparent low melting point glass with content of PbO of 70.4% is printed and baked on the NESA transparent electrode 3 of glass plate 1 to form a dielectric layer 6. Moreover, in view of forming a discharge cell 9, a material mixing a low melting point glass powder of Al2O3, etc. is screen printed and baked on a dielectric material layer 6 in order to form a discharge cell material 8. Meanwhile, and Al thin film electrode 4 is formed on the glass plate 2 and a low melting point glass with addition of black metal oxide with inclusion of PbO of 43% (40-50%) is printed and baked thereon in order to form a dielectric material layer 7. Thereafter, the glass plates 1 and 2 having completed the surface processing are provided opposed to each other. These are sealed with the frit glass 5, the discharge cell 9 is filled Ne gas, thereby completing a plasma display panel. In such a structure, the electrode wiring is fined using Al thin film due to the increase of display capacity without discoloration or decrease of aluminum and thereby yield can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a gas discharge display board in which electrodes are covered with a dielectric material,
This relates to so-called plasma display panels, and in particular to the composition of dielectric materials.

[Conventional technology]

A plasma display panel is coated with a dielectric material and has nine electrodes facing each other, and is used as a display device by applying an alternating electric field between these electrodes to discharge gas sealed inside.

In a conventional plasma display panel, for example, a NESA transparent electrode formed on a front substrate is covered with a dielectric layer obtained by screen printing a paste-like low melting point glass and firing it. On the other hand, the electrodes on the rear substrate are coated with a dielectric layer obtained by adding a black metal oxide, then screen-printing a paste-like low melting point glass gold, and baking. The electrodes on the rear substrate were formed by screen-printing a conventional silver paste and then baking it to form a silver electrode, but in recent years, with the expansion of the display capacity9 display function required for display boards, The wiring density of
It has become impossible to form electrodes using conventional screen printing methods. In order to solve this problem, a method has recently been adopted in which an AI thin film electrode formed by photolithographic processing technology is used instead of a silver electrode. Furthermore, it has conventionally been customary to screen print a lath with a low melting point content of 60 to 80% dielectric material 1apbo and sinter it at 560 to 600'O.

[Problem that the invention seeks to solve]

However, when conventional low-attractive glass is screen-printed on Al'lC and fired, problems such as the AJ electrode getting stuck in the glass and disconnection of the Aj'rlL electrode wiring occur, resulting in a decrease in yield. It has the disadvantage of inviting

[Means to solve all problems]

The present invention was made to solve all of these problems, and the P of low-attractive glass as a dielectric covering the Al electrode.
It is characterized by having a bO content of t-40 to 50%, and its purpose is to provide a plasma nice play that does not cause any decrease in yield despite having a large display capacity.

〔Example〕 Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention. 1 work 2
is a glass plate, and a transparent electrode 3 made of Nesa film or the like is applied to the glass plate 1. +aPbO content 70 on Nesa transparent electrode 3
．． 4% clear low melting point glass after screen printing 600
The dielectric layer 6 is formed by firing at
The discharge cell member 8t was formed by screen-printing a material prepared by mixing a low-melting glass powder with a low-melting-point glass powder onto the dielectric layer 6 and firing it at 560°C. On the other hand, on the glass plate 2, an A/thin film electrode 4t fabricated using photolithography technology was formed as an electrode, and a black metal oxide with a PbO content of 43% was added thereon. The low melting point glass was screen printed and then fired at 600°C to form a L dielectric layer 7t. After that, the glass plates 1 and 2, which had been surface-treated as described above, were placed opposite each other, and
The plasma display panel was completed by sealing with glass 5 and filling the discharge cells 9 with Ne gas. The plasma display panel trl manufactured in this manner had no defects at all due to the cutting V of the Al electrode, and could be manufactured with an extremely high yield. On the other hand, conventional P was used in the dielectric layer of the rear substrate.
Manufactured using low melting point glass with bO content of 70.4% and sold as a Tomo plasma display panel with ll':1. There were many disconnections of the Al electrode, and the yield was very poor. We investigated the cause of this and found that it is because the PbO contained in the low-melting point glass interacts with the AJ electrode during firing, causing the A/ to turn black and flaring. 4″)
won. Table 1 Content of HPbO The area where the AI thin film changed color when it was screen printed on a low melting point glass tAJ thin film containing gold and fired at 600°C once and twice, expressed as a percentage of the total area. However, as shown in the table, the film quality of AJ deteriorates as the PbO content increases. In addition, we investigated various PbO contents and found that when the PbO content exceeds 50%, the quality of the Al film deteriorates, and when the PbO content is less than 40%, it is difficult to sinter at 600℃. The first problem was discovered that the low melting point glass was not sufficiently melted and the surface of the shaped dielectric layer was not smooth.

〔Effect of the invention〕

As explained above, the present invention utilizes low melting point glass with a PbO content of 40 to 50% as the dielectric material of a plasma display, and uses an AI thin film to refine the electrode wiring as the display capacity increases. Also, since the AJ does not discolor or break during the formation of the dielectric layer, there is an advantage that the yield can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention. 1...Glass plate, 2...Glass plate, 3...
...Transparent electrode, 4...AJ thin film electrode, 5...
...7 lit glass, 6... dielectric, 7...
...Dielectric material according to the present invention, 8...Discharge cell member, 9
...discharge cell. Agent Patent Attorney Susumu Uchihara・'=:,,';2
゜′、−: −Go two゛

Claims (1)

[Claims] A rear substrate having a first electrode covered with a first dielectric and a front substrate having a discharge cell member and a second electrode covered with a second dielectric are opposed to each other to obtain a predetermined discharge gap. In an external electrode type discharge display panel which is hermetically sealed and has a dischargeable gas filled inside, an Al thin film electrode is used as the first electrode, and at least one of the first and second dielectrics is used. The PbO content of the dielectric of 1 is 4
An external electrode type discharge display board characterized in that the ratio is 0 to 50%.