JP3412548B2 - Plasma display panel - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a plasma display panel used for a display device or the like.

[0002]

2. Description of the Related Art FIG. 3 is a schematic side view of a glass substrate used in a conventional plasma display panel, which has a shape in which an edge of a glass substrate end face is linearly processed. That is, the edge portion 31 of the end surface of the glass substrate 30.
Has a linear shape.

FIG. 4 is a schematic side view of a glass substrate used in a conventional plasma display panel,
The corner portion 41 of the glass substrate 40 has a linearly processed shape.

[0004]

In the manufacture of plasma displays, a baking and heating process at a high temperature of 300 ° C. or higher is often used. For example, the front glass substrate is fired and heated for the glass dielectric, and the back glass substrate is fired and heated for the glass Ag-based electrode, the glass dielectric, the partition walls, and the phosphor film. Finally, there is a firing and heating process of sealing for bonding the front glass substrate and the back glass substrate.

Therefore, in a combination of a glass substrate and a glass dielectric or a partition wall, a combination of a front glass substrate and a rear glass substrate, etc., due to the difference in the thermal expansion coefficient of the constituent members and the difference in the thermal history, the glass substrate is There is a problem that the glass substrate is easily broken by heat stress.

[0006]

In order to solve the above-mentioned problems, the present invention provides the glass substrate with a rounded shape on the edge or the corner of the end face so as to reduce the stress strain on the edge or the corner of the glass end face. By avoiding concentration, the breakage of the glass substrate during manufacture of the plasma display panel and subsequent handling is reduced.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of a glass substrate for a plasma display panel used for explaining an embodiment of the present invention.

In the figure, the rounded shapes provided on the upper and lower edge portions 11 of the end surface of the glass substrate 1 are shown. The glass substrate used has a thickness of 2.8 mm and is rounded to 0.6 mm. This rounding is similarly performed on the four sides of the rectangular glass substrate.

FIG. 2 is a schematic plan view of a glass substrate for plasma display panel used for explaining one embodiment of the present invention. FIG. 2 shows a corner portion 2 of the glass substrate 1.
3mm radius processing provided in No. 1 is added.

The glass substrate thus obtained (size: 2
A method for producing a plasma display panel using 30 mm × 333 mm and a thickness of 2.8 mm) will be described.

For the front glass substrate, a glass-silver electrode film formed on the glass substrate is baked at 600 ° C., then a glass dielectric is formed on this electrode film and baked at 590 ° C., and 0.5 μm is further formed thereon. A thin film of MgO was formed by vacuum evaporation.

For the back glass substrate, the glass-silver electrode film formed on this glass substrate is baked at 600 ° C., then glass-based partition walls are formed and baked at 550 ° C., and a phosphor layer is applied in the partition walls. It was obtained by firing at 520 ° C.

The front glass substrate and the rear glass substrate thus obtained are bonded together by using a sealing glass 450
The panel was fired at a temperature of ℃ to prepare a panel before charging with discharge gas.

The front glass substrate and the rear glass substrate thus obtained were subjected to a thermal shock to perform a damage test on the glass substrates. For the damage test, the above test board was burned by a Nippon Electric Glass Co., Ltd. sintering setter (Neoceram N-1).
1) When the glass substrate of the present invention was placed on it, heated to 280 ° C. in a heating tank, and then taken out at room temperature together with the setter for firing to examine the degree of cracking of the glass substrate, no damage was found in the glass substrate of the present invention.

On the other hand, in the front glass substrate and the rear glass substrate manufactured by using the conventional glass substrate in the same manner as the case of the present invention, the damage of the glass substrate was found in the above thermal shock damage test.

In this embodiment, the plasma display panel is taken as an example, but it goes without saying that other display devices can be applied as long as the display panel uses a glass substrate heated in the manufacturing process. Further, it is more preferable to use a glass substrate in which not only the end face edge portion or corner portion but also the end face edge portion and corner portion are rounded.

[0017]

As described above, according to the present invention, a glass substrate having high resistance to heat attack can be obtained, the temperature lowering rate at the time of firing and heating can be accelerated, and the manufacturing yield due to damage to the glass substrate can be improved. Is.

[Brief description of drawings]

FIG. 1 is a schematic side view of a glass substrate according to an embodiment of the present invention.

FIG. 2 is a schematic plan view of a glass substrate according to an embodiment of the present invention.

FIG. 3 is a schematic side view of a conventional glass substrate.

FIG. 4 is a schematic plan view of a conventional glass substrate.

[Explanation of symbols]

1 glass substrate 11 Edge of glass substrate end face 21 Corner of glass substrate

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaki Aoki 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-7-186022 (JP, A) JP-A-8- 118220 (JP, A) JP-A-11-92170 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 17/16

Claims (3)

(57) [Claims] 1. A partition is provided on at least one of a front glass substrate provided with an electrode and a dielectric layer and a rear glass substrate provided with an electrode and a phosphor layer, and each electrode surface is kept at a predetermined gap. Is a plasma display panel in which a dischargeable gas medium is sealed inside, and the corners of the front glass substrate and the rear glass substrate are rounded. Plasma display panel. 2. A partition is provided on at least one of a front glass substrate provided with an electrode and a dielectric layer and a rear glass substrate provided with an electrode and a phosphor layer, and each electrode surface is kept at a predetermined gap. A plasma display panel in which a dischargeable gas medium is sealed inside and facing each other, and end edges and corners of the front glass substrate and the rear glass substrate are rounded. A plasma display panel characterized by the above. 3. The front glass substrate and the rear glass substrate
Claim 1 or Claim 2 in which four sides of R are processed.
Plasma display panel according to.