JPH11176322A - Manufacture of plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method capable of efficiently manufacturing a PDP(a plasma display panel) having highly fine barrier ribs. SOLUTION: Barrier ribs are formed on a back face substrate, and a front face plate is provided thereon so as to manufacture a plasma display panel. An organic substance layer to be vaporized by laser beam irradiation is formed on the back face substrate. Next, grooves are formed by applying the laser beam onto the barrier ribs-to be formed part of the layer and diffusing the organic substance. After barrier rib material is filled into the grooves, the same is heated so that the remaining organic substance is vaporized, and the barrier rib material is sintered so as to form the barrier ribs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a plasma display panel (hereinafter abbreviated as PDP), and more particularly to a method of manufacturing a PDP with an improved method of forming partition walls.

[0002]

2. Description of the Related Art As is well known, a PDP is formed by forming electrodes, a dielectric layer and the like on a rear substrate (rear glass), forming a partition, and providing a phosphor, a transparent electrode, and a front plate (front glass). In addition, a sealed gas such as a rare gas containing a metal vapor is sealed in a cell partitioned by a partition.

The following method (1) or (2) has been adopted as a conventional method for forming the partition walls. (1) Printing method: Screen printing and baking are repeated by forming the partition wall material paste several times to several tens times. (2) Sandblasting: A resist having a desired pattern is formed on the partition wall material layer, and unnecessary portions are removed by sandblasting.

[0004]

The above conventional method has the following disadvantages.

That is, in the printing method (1), several times to 1
Since screen printing and baking are repeated several times, it is very difficult to secure positional accuracy. In addition, it is disadvantageous in increasing the size and increasing the definition.

In the sand blast method (2), photolithography is required to form a dry film resist. The resist needs to have a certain thickness to ensure sandblast resistance. Therefore, there is a limit to high definition. Poor reproducibility of sandblasting conditions. It is necessary to temporarily calcine the partition material layer to a hardness that facilitates sandblasting, and then perform final firing after the blasting, which complicates the process. There were disadvantages such as.

A method of forming a partition material layer containing lead on the rear substrate and removing a portion corresponding to the cell by laser irradiation to form a partition has been studied. Since the area of the cell equivalent part is much larger than that of the cell part, most of the partition material layer formed on the rear substrate is removed, so that a large amount of lead-containing waste is generated; There are disadvantages.

An object of the present invention is to solve such a problem and to provide a method for efficiently producing a PDP having high-definition partition walls.

[0009]

According to the present invention, there is provided a method of manufacturing a plasma display panel comprising a partition formed on a rear substrate and a front plate provided on the rear substrate. A layer of an organic substance which volatilizes by beam irradiation is formed, and then a portion of the layer forming a partition is irradiated with a laser beam to volatilize the organic substance to form a groove, and the groove is filled with a partition wall material. It is characterized by post-heating to volatilize the remaining organic substances and to sinter the partition wall material to form partition walls.

[0010] As described above, a groove is formed by laser irradiation, the groove is filled with a partition material, the remaining organic substances are volatilized, and the partition material in the groove is sintered to form the partition. A high-definition partition can be formed.

In the present invention, when filling the groove with the partition wall material by printing, the partition wall can be formed with high definition even if the printing accuracy is rough.

Further, according to this method, since there is no step of cutting the partition wall material layer made of lead-containing glass unlike the sandblasting method, no lead waste is generated and the waste of partition wall material is significantly reduced. can do.

Further, according to the method of the present invention, the scanning interval
By adjusting the length, it is easy to cope with the dimensional variation of each substrate, which is advantageous for increasing the size.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, as an organic substance formed on a rear substrate, a groove can be formed by laser irradiation and decomposes and evaporates at a temperature of 500 ° C. or lower which is lower than a sintering temperature of a partition wall material. It is desirable that the resin does not leave an unnecessary residue by sublimation. Specifically, for example, a wax such as a paraffin wax or a synthetic resin which volatilizes at a temperature of 500 ° C. or less can be used.

The thickness of the volatile organic material layer is preferably determined according to the height of the partition to be formed.

The laser beam for irradiating the volatile organic layer is a carbon dioxide gas laser beam (wavelength 1060).
0 nm), 2nd harmonic of YAG (355 nm) and YAG3
Harmonic waves (532 nm) and the like are outside the absorption wavelength of the back glass, and can be suitably used. Especially YAG second harmonic, Y
AG third harmonic is preferable because the residual after cutting is small.

After the grooves are formed in the volatile organic material layer as described above, the grooves are filled with partition walls. This filling is preferably performed by applying, printing or electrodepositing a paste or slurry containing the partition wall material powder.

It is preferable that the partition wall material is mainly made of glass, such as glass powder, crystallized glass powder, or mixed powder of glass powder and ceramic powder such as porcelain.

After the grooves are filled with partition walls, they are dried if necessary, and then fired at about 530-590 ° C. This firing causes the remaining volatile organic layer to melt, evaporate, or sublimate, and the partition walls in the grooves are sintered to form partition walls. The firing time is preferably about 5 to 15 minutes.

In one embodiment of the present invention, as shown in FIG. 1, an address electrode is formed on a rear substrate, a volatile organic material layer is formed on the rear substrate so as to cover this electrode, and a laser beam is formed on a partition wall. Irradiate toward the planned area to form a groove. A paste or slurry containing a partition material powder is screen-printed and filled in the groove, and then dried and fired to form a partition.

In order to form an address electrode, a method of printing a metal-containing photosensitive printing material for forming an electrode, drying, exposing, and developing is preferable, but other pattern forming methods may be used.

In another embodiment of the present invention, as shown in FIG. 2, an address electrode and a partition pattern are formed on a rear substrate. This forming method can employ the same method as that of FIG.

Next, a volatile organic material layer is formed on the back substrate, and a laser beam is irradiated toward the partition pattern to form a groove so that the partition pattern is exposed. Then, this back substrate is immersed in the suspension of the partition wall material powder,
A counter electrode is arranged so as to face the rear substrate, a DC voltage is applied between the partition pattern and the counter electrode plate, and the groove is filled with a partition material powder by electrodeposition. Then dry,
By baking, partition walls are formed.

[0024]

EXAMPLE 1 D was placed on a back glass plate of 100 mm × 100 mm × 3 mm.
Thick film printing of a photosensitive Ag electrode (DC202) manufactured by Upon Co., Ltd., followed by drying, exposure and development, and then at 580 ° C. for 1 hour.
Baking for 0 minutes, the pitch of address electrodes having a width of 100 μm is 2
It was formed at 00 μm.

Next, as shown in FIG. 1, wax was coated on the entire surface of the electrode layer to a thickness of 200 μm.

Next, the third harmonic of the YAG laser (wavelength 3
55 nm) or a second harmonic (wavelength: 532 nm) is used to form a 50 μm wide, 90 mm long partition embedding groove.
It was formed at a pitch of 00 μm. Lasers of these wavelengths were absorbed only by the wax without being absorbed by the glass component and the address electrode, so that processing was possible without causing any other damage.

Next, a glass powder (GA manufactured by NEC Corporation)
-1) A mixed paste of 70 parts by weight and 30 parts by weight of an organic vehicle (GB1000 manufactured by Kyoto Elex Co.) was filled into the groove through a screen.

After drying, baking was performed at 580 ° C. for 10 minutes in the atmosphere to form high-definition partition walls. In addition, all the wax melted and evaporated by this firing, and no residue remained in the cell portion.

Example 2 A thick Ag electrode was printed on the back glass plate using the same printing material as in Example 1. Similarly, drying, exposure, development and baking were performed to form an address electrode and a partition pattern. next,
The whole surface of these Ag electrodes was coated with wax to a thickness of 180 μm. Next, only the wax on the partition pattern was volatilized by the same laser irradiation as in Example 1.
A groove similar to that described above was formed.

The glass plate was suspended in a glass powder electrodeposition suspension (the glass powder of Example 1 was treated with isopropyl alcohol 10
0 part by volume, 2.5 parts by volume of acetic acid, and 0.1 parts by volume of water) dispersed in a mixture of 20 g / L), and the opposing electrode plates are opposed to each other at a distance of 15 mm. 1
Min, and the grooves were filled with glass powder.

Thereafter, it was dried and baked at 590 ° C. for 10 minutes in the atmosphere to form high-definition partition walls. In addition, all the wax melted and evaporated by this firing, and no residue remained in the cell portion. The silver forming the partition pattern was covered with the glass partition.

[0032]

As described above, according to the present invention, a PDP having a high-definition partition wall is provided. According to the method of the present invention,
This partition can be formed very efficiently. According to the method of the present invention, no lead waste is generated and material waste is significantly reduced.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a method of an embodiment.

FIG. 2 is a flow chart showing another embodiment method.

Claims (2)

[Claims] 1. A method for manufacturing a plasma display panel, comprising: a partition formed on a rear substrate, and a front plate provided on the partition, comprising: forming a layer of an organic substance which is volatilized by laser beam irradiation on the rear substrate; A groove is formed by irradiating a laser beam to a portion of the layer that forms a partition wall to volatilize the organic substance, forming a groove in the groove, filling the partition wall material, and then heating to volatilize the remaining organic substance. A method for manufacturing a plasma display panel, comprising forming a partition by sintering a partition material. 2. The electrodeposition material according to claim 1, wherein said partition wall material is mainly made of glass such as glass powder, crystallized glass powder, or a mixed powder of glass powder and ceramic powder such as porcelain. Filling the grooves by coating or printing.