JPH0660815A - Plasma display panel and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the variation of an opening area of an electric discharging cell in a plasma display panel by using a partition wall made of a net-like metal sheet in place of a conventional partition wall obtained by thick film printing, and interposing the partition wall between a front glass substrate and a rear glass substrate. CONSTITUTION:After an SmO2 film is formed on a front glass substrate 1 by a CVD method, a transparent electrode 3 is formed by photolithography, and is covered over the whole surface thereof with a dielectric layer 5. A silver electrode 4 is formed on a rear glass substrate 2 by thick film printing, and is covered with another dielectric layer 6. A sheet having a thickness of about 100mum is etched, thus obtaining a net-like partition wall 9, which is mounted on the substrate 2, for positioning. The substrate 1 is mounted on the partition wall 9 in such a manner as to face the substrate 2, followed by positioning of the substrate 1, the portion wall 9, and the substrate 2, to be fixed by a sealing clip. Thereafter, the substrates are air-tightly sealed by frit glass, and the insides thereof are removed to be sealed with neon gas. Consequently, a ratio of a maximum opening area to a minimum opening area is set to about 1:0.867.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a plasma display panel.

[0002]

2. Description of the Related Art A conventional ac-type plasma display panel will be described by way of an example of a high-definition / high-density high-density PDP of opposed discharge type in which discharge cells are arranged in a matrix.

In the plasma display shown in FIG. 4A, a SnO ₂ film is formed on a front glass substrate 1 by CVD, and then a transparent electrode 3 is formed by photolithography.
The entire surface thereover is covered with a dielectric layer 5. Next, the partition wall 7 is formed by directing it to the transparent electrode 3. The barrier ribs 7 serve also as the barrier ribs of the discharge cells and the dimensions of the discharge gap, and are usually printed twice or more by a thick film printing method with a dielectric to which a black pigment is added to prevent leakage of light emission and have a predetermined height ( About 50
μm).

Further, a silver electrode 4 is formed on one rear glass substrate 2 by a thick film printing method, and the entire surface thereof is covered with a dielectric layer 6. Next, the partition wall 8 is formed by directing it to the silver electrode 4. This partition wall 8 is formed in the same manner as the front glass substrate. As shown in FIG. 4 (b), the front glass substrate and the rear glass substrate formed in this manner are mutually combined so that the barrier ribs are orthogonal to each other and discharge cells surrounded by the barrier ribs are opposed to each other. The frit glass was hermetically sealed at the periphery thereof, and a dischargeable rare gas was introduced into the interior.

[0005]

In this conventional plasma display panel, since the partition wall is formed by thick film printing, it is difficult to suppress the variation in the width of the partition wall. That is, first, due to the dimensional accuracy of the screen, the specified line width varies by about ± 10 μm.
Further, the line width of the screen becomes thicker by 20 to 50 μm due to the sagging (leveling) of the paste during printing.

The degree of this variation does not become a problem when the discharge cell pitch is large, but becomes more serious as the resolution becomes higher. For example, when the discharge cell pitch is 0.4 mm and the designated line width of the screen is 0.12 mm, the variation in the line width of the barrier rib is 0.13 to 0.18 mm. The variation of the opening area of the discharge cells is 0.0729 to 0.04 when the discharge cell pitch is the same vertically and horizontally and the partition line width is the same.
It is 84 mm ² , and the ratio of the maximum opening area to the minimum opening area is about 1: 0.664, and the difference is about 33.6%. Therefore, this variation in the opening area causes variation in the amount of light emitted by discharge, which does not affect the brightness, but there is a problem that the display quality is seriously affected because the brightness changes.

[0007]

The plasma display panel of the present invention is replaced with a conventional barrier rib by thick film printing,
A partition made of a mesh metal sheet is provided between the front glass substrate and the rear glass substrate.

[0008]

By forming the partition wall from the metal sheet by the etching method, it is possible to accurately suppress the variation in the width of the partition wall. The specified line width can be suppressed to about ± 10 μm. Therefore, the variation in the line width of the barrier rib is 0.11 to 0.13 mm, and the variation in the opening area of the discharge cell is 0.0841 to 0.0729 m.
At m ² , the ratio of the maximum opening area to the minimum opening area is about 1: 0.867, and the difference is about 13.3%.
A significant improvement effect of 0.3% can be expected.

[0009]

The present invention will be described below with reference to the drawings.

FIG. 1A is a sectional view of a part of a plasma display panel showing an embodiment of the present invention.
(B) is a partial schematic diagram in which the front glass substrate and the rear glass substrate are separated.

As shown in the figure, C on the front glass substrate 1
After forming the SnO ₂ film by VD, the transparent electrode 3 is formed by photolithography, and the entire surface thereof is covered with the dielectric layer 5. Further, a silver electrode 4 is formed on one rear glass substrate 2 by a thick film printing method, and the entire surface thereof is covered with a dielectric layer 6. Next, the partition walls 9 formed in a net shape by an etching method using a metal sheet having a plate thickness of about 100 μm are placed on the rear glass substrate 2 for alignment, and then, as shown in FIG.
As shown in (b), the whole glass substrate 1 is placed on the rear glass substrate so as to face each other, the front glass substrate 1, the partition wall 9 and the rear glass substrate 2 are aligned with each other and fixed with a sealing clip, A frit glass pre-installed around the substrate was welded, hermetically sealed, and once evacuated to 7 × 10 ⁻⁷ Torr, neon gas was introduced to a pressure of about 300 Torr and sealed to complete a plasma display panel. .

Next, a second embodiment will be described.

This embodiment is different from the above-mentioned first embodiment in the following points. That is, the material of the partition wall 9 is 426 alloy. The partition wall 9 made of the 426 alloy is used after being subjected to the oxidation treatment. The other points are the same as those in the first embodiment.

A third embodiment will be described with reference to FIG.

This embodiment is different from the above-mentioned first embodiment in the following points. That is, as shown in FIGS. 2A and 2B, at least one notch 10 is provided in a portion of the partition wall 9 corresponding to one cell. The other points are the same as those in the first embodiment.

A fourth embodiment will be described with reference to FIG.

This embodiment is different from the above-mentioned first embodiment in the following points. That is, as shown in FIG. 3, the partition wall 9 formed by etching a metal sheet has a mesh shape, and the projections 11 projecting outward from the entire surface substrate and the rear surface substrate are provided at the four corners. The other points are the same as those in the first embodiment.

[0018]

As described above, according to the present invention, the following effects can be obtained.

(1) By forming the partition wall from a metal sheet by an etching method, it is possible to accurately suppress variations in the width of the partition wall. About ± 10 for specified line width
The variation can be suppressed to about μm. Therefore, the variation of the line width of the barrier rib is 0.11 to 0.13 mm, and the variation of the opening area of the discharge cell is. 0.841 ~
At 0.0729 mm ² , the ratio of the maximum opening area to the minimum opening area is about 1: 0.867, and the difference is about 13.3.
%, A significant improvement effect of about 20% can be expected.
Therefore, the variation in the opening area of the discharge cell can be reduced by about 20%, and the variation in the light amount of the discharge emission can be reduced.
It is possible to provide an ac type plasma display panel with stable brightness and good display quality.

In this example, the discharge cell pitch is 0.4 mm.
Although the above-mentioned effect is hardly present when the discharge cell pitch is large, a remarkable effect can be expected as the resolution becomes higher.

(2) When the material 12426 alloy for the partition wall 9 is used, the coefficient of thermal expansion is close to that of the material of the substrate, which is glass, and the wettability with the frit glass for sealing is also improved.
Positional displacement due to thermal expansion during sealing can be prevented, and when the partition wall 9 is fixed at the sealing portion, the mechanical strength of the sealing portion can be improved. Since this 426 alloy is subjected to the oxidation treatment, it also has an advantage that the antireflection treatment can be simultaneously performed.

(3) Since at least one notch is provided in a portion of the partition wall 9 which corresponds to one cell, it becomes possible to uniformly and promptly exhaust gas and introduce neon gas into each cell when exhausting and introducing neon gas. Have advantages.

(4) Since the sheet-shaped partition wall 9 is provided with the protrusions 11 protruding outward from the full-face substrate and the rear substrate, the protrusions 11 enable efficient alignment and sealing. At the same time, this projection 11 is also sealed and the partition 9 can be fixed at the same time.

[Brief description of drawings]

FIG. 1 is a partial sectional view and a partial schematic view of a first embodiment according to the present invention.

FIG. 2 is a partial sectional view and a partial schematic view of a third embodiment according to the present invention.

FIG. 3 is a schematic diagram of a fourth embodiment according to the present invention.

FIG. 4 is a partial cross-sectional view and a partial schematic view of a conventional example.

[Explanation of symbols]

 1 Front Glass Substrate 2 Rear Glass Substrate 3 Transparent Electrode 4 Silver Electrode 5 Dielectric Layer 6 Dielectric Layer 7 Partition 8 Partition 9 Partition 9 Cutout 11 Protrusion

Claims (2)

[Claims] 1. A first insulating substrate having at least one stripe-shaped discharge electrode covered with a dielectric film on one main surface thereof, and a stripe-shaped discharge electrode covered with a dielectric layer film. A second insulating substrate which has at least a discharge electrode and is opposed to and disposed with respect to the first insulating substrate with a predetermined discharge gap maintained, and at least one electrode of the one or both insulating substrates and between discharge cells In a plasma display panel having a large number of barrier ribs provided in, hermetically sealing the periphery of the insulating substrate, and introducing a dischargeable rare gas into the inside, the barrier ribs are made of a mesh metal sheet. Characteristic plasma display panel. 2. A large number of stripe-shaped discharge electrodes coated with a dielectric film are formed on one main surface of a first insulating substrate,
A large number of stripe-shaped discharge electrodes coated with a dielectric film are formed on one main surface of a second insulating substrate, and a large number of barrier ribs are provided on at least one of the electrodes of the insulating substrate on one side or the lid and between discharge cells. The first insulating substrate and the second insulating substrate are assembled by facing each other while maintaining a predetermined discharge gap, and the periphery thereof is hermetically sealed with frit glass, and a dischargeable rare gas is introduced into the inside. In the method for manufacturing a plasma display panel, the partition walls formed in a net shape by etching a metal sheet are aligned with the discharge cells during the assembling and hermetically sealing, and then the first insulating substrate and the second insulating substrate are aligned. A method of manufacturing a plasma display panel, which comprises sealingly installing the substrate.