KR20000060891A - Fabricating Method of Barrier Rib for Plasma Display Panel - Google Patents

Abstract

PURPOSE: A method for fabricating a bulkhead for a plasma display device is provided to form a bulk head having high aspect ration and high fineness. CONSTITUTION: A method for fabricating a bulkhead for a plasma display device comprising casting and drying a slurry(46) for a bulkhead at a water-soluble plastic mold. A bulkhead material(46) having a bulkhead shape is aligned and joined at a substrate(52) on which a green sheet(50) is stacked, and thus an electrode(48) is formed at the green sheet(50). After removing the water-soluble plastic mold, hardening process is performed to form a bulkhead(54).

Description

Fabrication Method of Barrier Rib for Plasma Display Panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing partition walls of a plasma display device, and more particularly, to a method for manufacturing partition walls for a plasma display device for forming partitions having high definition and high aspect ratio.

Recently, Liquid Crystal Display (hereinafter referred to as "LCD"), Field Emission Display (hereinafter referred to as "FED") and Plasma Display Panel (hereinafter referred to as "PDP") Flat display devices such as PDP have been actively developed. Among them, PDP is easy to manufacture due to its simple structure, high brightness and high luminous efficiency, memory function, and has a wide viewing angle of 160 ° or more, and realizes a large screen of 40 inches or more. It has the advantage of being able to.

Referring to FIG. 1, the PDP according to the related art is coated with a predetermined thickness on the lower glass plate 14 on which the address electrode 2 is mounted, and the upper portion of the lower glass plate 14 to form a wall charge. The dielectric layer 18, the partition wall 8 formed on the dielectric layer 18 to divide each discharge cell, the phosphor 6 excited and emitted by the light generated by the plasma discharge, and the upper glass plate ( A transparent electrode 4 formed on the upper portion of the upper surface 16, a dielectric layer 12 that is formed on the upper glass plate 16 and the transparent electrode 4 with a predetermined thickness to form wall charges, and the dielectric layer 12 The protective film 10 which protects the dielectric layer 12 from sputtering by the discharge apply | coated on the top is provided. When a predetermined driving voltage (for example, 200V) is applied to the address electrode 2 and the transparent electrode 4, plasma discharge is caused by electrons emitted from the address electrode 2 inside the discharge cell. In detail, the electrons emitted from the electrode collide with the atoms of the He + Xe gas or the Ne + Xe gas enclosed in the discharge cell to ionize the atoms of the gas, and the emission of the secondary electrons occurs. Repeats collisions with atoms in the gas, ionizing atoms in turn. In other words, they enter the avalanche process, where electrons and ions double. The light generated in the avalanche process is excited to emit red (Red; " R "), green (hereinafter, " G "), and blue (" B ") phosphors. The light of R, G, and B emitted from the phosphor passes through the protective film 10, the dielectric layer 12, and the transparent electrode 4 to the upper glass plate 16 to display characters or graphics. Meanwhile, the partition wall 8 is formed in a stripe shape to divide each discharge cell, and reflect the light emitted from the phosphor 6 toward the upper glass plate 16.

On the other hand, with the trend of applying PDP to high-definition display devices, the bulkhead has become high definition and demands high aspect ratio. In response to these demands, a low temperature cofired ceramic on metal (LTCCM) method for simplifying a process and manufacturing a high-definition, high aspect ratio partition wall has been proposed. Hereinafter, a method of manufacturing a partition wall using the LTCCM method will be described.

Referring to Figure 2, the procedure of the partition wall manufacturing method according to the prior art is shown.

A green sheet 20 is formed. (First Step) The green sheet 20 is prepared by preparing a slurry, and then forming the slurry using a tape casting apparatus to have a predetermined thickness. At this time, the slurry is formed by mixing the organic material in the glass powder at a predetermined ratio. In this case, the organic substance means a binder for maintaining the viscosity of the glass powder, a plasticizer for preventing the curing of the slurry to have a predetermined flexibility, a solvent for dissolving the binder and the plasticizer, and a predetermined amount of additives. The slurry is used for tape casting while maintaining a liquid state. Thus, the manufacturing method of forming a slurry to predetermined thickness using a tape casting apparatus is called "doctor braid method." The green sheet 20 formed by the above process is shown in FIG.

The green sheet 20 is laminated on the substrate 22. (Second Step) After the green sheet 34 is separated from the tape casting apparatus, the green sheet 34 is laminated and attached to the upper portion of the substrate 22 having a predetermined thickness. The substrate 22 may be made of glass, glass-ceramic, ceramic, metal, or the like. Particularly in the case of metal, titanium is mainly used. At this time, the green tape 20 stacked on the substrate 22 is shown in Figure 2 (b).

An electrode 24 is formed on the green sheet 20. (Third Step) The green sheet 20 stacked on the substrate 22 is introduced into a printer (not shown) to print and form the electrode 24. At this time, the electrode 24 formed on the upper portion of the green sheet 20 is shown in (c) of FIG.

An electrode protective layer 26 is formed on the electrode 24. (Step 4) An electrode protective layer 26 is formed on the electrode 24 to protect the electrode. At this time, the electrode protective layer 26 formed on the electrode 24 is shown in Fig. 2 (d).

After the mold 28 having the shape opposite to the partition wall is positioned above the substrate 22, the partition wall 30 is formed by applying a predetermined pressure. (Fifth Step) After placing the mold 28 having the grooves 28a having the shape opposite to the partition wall on the substrate 22, the green sheet was applied with a predetermined pressure (for example, 100 kgf / cm 2). The partition 30 is formed at 20. In this case, a predetermined pressure is applied between the mold 28 and the substrate 22 or by using a roller or the like. At this time, the green sheet 20 is molded into the shape of the partition wall by the mold 28 of the partition opposite shape. At this time, the process of forming the partition wall is shown in (e) of FIG. In addition, the partition 30 in which the molding is completed is fired at a predetermined temperature. At this time, the partition 30 formed by baking is shown in FIG.2 (f). Meanwhile, in the molding process illustrated in FIG. 2E, the surface of the mold 28 and the green sheet 20 are thermocompressed by being pressed by a predetermined pressure. Due to this, the partition 30 is in a state of being fitted into the partition forming groove 28a, so that a part of the partition 30 is separated from the green sheet 20 in the process of separating the partition 30 and the mold 28. Being derived.

Referring to FIG. 3, there is shown a diagram for explaining another method of manufacturing a partition for a plasma display device.

The electrode pattern 24 is formed on the lower substrate 22. (Eleventh Step) An electrode pattern 24 is formed on the lower substrate 22 as shown in FIG. In this case, the electrode pattern 24 is disposed below the discharge space. A die 28 having a partition-shaped groove is joined to an upper portion of the lower substrate 22. (Twelfth Step) As shown in FIG. 3B, after the mold 28 is positioned on the upper portion of the lower substrate 22, the mold 28 is bonded to the lower substrate 22 using a bonding material. The mold 28 is tightly fixed to the lower substrate 22 by the shim. The partition wall material 32 is filled into the partition 28 grooves formed in the die 28. (Step 33) A partition wall 32 is formed in the partition wall groove formed in the mold 28 by depositing the mold 26 to which the lower substrate 14 is attached to the partition wall material (eg, slurry). It is filled. The mold 28 is removed to form the partition wall. (Step 34) The mold 28 and the partition wall 32 are fired at a predetermined temperature so that the mold 28 can be removed. At this time, the mold 28 and the lower substrate 22 are separated to form the partition wall 30. In the method of manufacturing the partition wall, when the partition wall material is filled into the mold, the partition wall material is difficult to be uniformly filled in the mold, and the problem that residues of the mold remain on the partition wall and the lower substrate during firing is derived.

Accordingly, an object of the present invention is to provide a method of manufacturing a partition for a plasma display device which forms a partition having a high definition and high aspect ratio.

1 is a diagram showing a conventional plasma display device.

2 is a view for explaining a conventional method for manufacturing a partition wall for a plasma display device.

3 is a view for explaining another method of manufacturing a partition wall for a conventional plasma display device.

4 is a view for explaining a method of manufacturing a partition for a plasma display device of the present invention.

5 is a view showing for explaining the plastic mold manufacturing method of FIG.

<Description of the code | symbol about the principal part of drawing>

2: address electrode 4: transparent electrode

6: phosphor 8,30,54: partition wall

10: protective layer 12, 18: dielectric layer

14: lower glass plate 16: upper glass plate

20,50 Green sheet 22,52 Substrate

24,48 electrode 26 electrode protective layer

28: mold 32: slurry

42: master mold 44: plastic mold

46: bulkhead

In order to achieve the above object, a method of manufacturing a partition wall for a plasma display device according to the present invention includes the steps of drying a partition wall material into a mold having a partition-shaped groove, bonding the mold to a substrate on which electrodes and green sheets are formed, and After the removal, the step of firing to form a partition wall.

Other objects and features of the present invention other than the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

A preferred embodiment of the present invention will be described with reference to FIGS. 4 to 5.

Referring to FIG. 4, a diagram for describing a method of manufacturing a partition wall for a plasma display device according to an exemplary embodiment of the present invention is illustrated.

A water-soluble plastic mold 44 having a partition groove 44a is provided. (Step 21) A water-soluble plastic mold 44 as shown in Fig. 4A is prepared. This will be described in detail with reference to FIG. 5. As shown in Fig. 5A, a water-soluble plastic resin is cast to the master mold 42 having the projection of the partition wall shape using a doctor blade method. At this time, the material of the master mold 42 is to use a metal, ceramic, glass or plastic. Subsequently, as shown in (b) of FIG. 5, the water-soluble plastic mold 44 having partition grooves is formed by removing the master mold 42. At this time, the water-soluble plastic mold 44 has a property of melting in water. For this purpose, it is preferable to use polyvinyl alcohol (hereinafter referred to as "PVA") for the water-soluble plastic resin. The partition wall slurry 46 is cast and dried in the mold 44. (Step 22) As shown in FIG. 4B, the partition slurry 46 is cast and dried in the plastic mold 44 using the doctor braid method. The partition member 46 having the partition shape is aligned and bonded to the substrate 52 on which the green sheet 50 is laminated. (Step 23) As shown in FIG. 4C, the partition wall member 46 having the partition wall shape is aligned with the green sheet 50 stacked on the substrate 52 and then joined by thermal compression. . At this time, the electrode 48 is formed on the green sheet 50. In addition, glass, glass-ceramic, ceramic, metal, or the like may be used as the material of the substrate 52. Particularly in the case of metal, titanium is mainly used. The water-soluble plastic mold 44 is removed and then fired to form the partition wall 54. (Step 24) The water-soluble plastic mold 44 is removed by putting the substrate 52 into water as shown in FIG. Subsequently, the substrate 52 from which the water-soluble plastic mold 44 has been removed is fired at a predetermined temperature to form the partition wall 54.

On the other hand, the composition of the partition material slurry and its composition ratio will be described. The partition green sheet is divided into a first composition ratio for making a white slurry and a second composition ratio for making a black slurry. The composition ratio of such a partition material slurry is shown in Table 1.

Bulkhead slurry composition and composition ratio ingredient 1st composition ratio (weight%) 2nd composition ratio (weight%) Glass Powder 60 59.5 Organic binder 3 3 Plasticizer 5 5 Solvent 31 31 First additive One One Second additive - 0.5

As shown in Table 1, in the composition ratio of the bulkhead slurry, the white slurry is 60 wt% glass powder, 31 wt% solvent, 5 wt% plasticizer, 3 wt% organic binder, and 1 wt% additive. It includes. On the other hand, the black slurry is 59.5 wt% glass powder, 31 wt% solvent, 5 wt% plasticizer, 3 wt% organic binder, 1 wt% first additive, 0.5 wt% second In this case, since the second additive uses black pigment, the color of the slurry is determined corresponding to the amount of the second additive. As described above, the partition wall having a high definition and high aspect ratio can be formed by the PDP partition wall manufacturing method according to an embodiment of the present invention.

Meanwhile, the manufacturing method of the partition wall for the plasma display device according to another exemplary embodiment of the present invention is similar to the manufacturing method shown in FIG. 4. In this case, in the method of manufacturing a partition wall according to another embodiment, a process of applying a partition paste by using a screen printing method on the water-soluble plastic mold 44 is distinguished from the embodiment. On the other hand, other processes are the same as the processes of the embodiment (21st step, 22nd to 24th step), so a detailed description thereof will be omitted.

Meanwhile, the composition of the partition wall paste and its composition ratio will be described. The partition paste is divided into a first composition ratio for making white paste and a second composition ratio for making black paste. The composition ratio of such a partition material paste is shown in Table 2.

Bulkhead paste composition and composition ratio ingredient 1st composition ratio (weight%) 2nd composition ratio (weight%) Glass Powder 70.5 69.5 Organic binder 5 5 Solvent 24 24 First additive 0.5 0.5 Second additive - One

As shown in Table 2, the white paste in the composition ratio of the partition wall paste contains 70.5 wt% glass powder, 24 wt% solvent, 5 wt% organic binder, and 0.5 wt% additive. Meanwhile, the black paste includes 69.5 wt% glass powder, 24 wt% solvent, 5 wt% organic binder, 0.5 wt% first additive, and 1 wt% second additive. Since the second additive uses black pigment, the color of the paste is determined according to the amount of the second additive. As described above, the partition wall having a high definition and high aspect ratio can be formed by the PDP partition wall manufacturing method according to another embodiment of the present invention.

As described above, the manufacturing method of the PDP partition wall of the present invention has the advantage that it is possible to form a partition having a high definition, high aspect ratio.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (9)

Putting a partition material into a mold having a partition-shaped groove and drying the partition wall material; Bonding the mold to a substrate on which electrodes and green sheets are formed; And removing the mold and then firing to form a partition wall. The method of claim 1, And a mold in which the partition-shaped grooves are formed is formed by casting a water-soluble plastic resin onto the partition-shaped master mold. The method of claim 2, A method of manufacturing a partition for a plasma display device, characterized in that the material of the water-soluble plastic resin is polyvinyl alcohol. The method of claim 1, The partition wall manufacturing method for a plasma display device characterized by the above-mentioned. The method of claim 4, wherein The slurry contains 60 wt% glass powder, 31 wt% solvent, 5 wt% plasticizer, 3 wt% organic binder, and 1 wt% additive. Manufacturing method. The method of claim 4, wherein The slurry contains 59.5 wt% glass powder, 31 wt% solvent, 5 wt% plasticizer, 3 wt% organic binder, 1 wt% first additive, and 0.5 wt% second additive. A partition wall manufacturing method for a plasma display device, comprising: The method of claim 1, The partition wall manufacturing method for a plasma display device characterized by the above-mentioned. The method of claim 7, wherein And the paste contains 70.5 wt% glass powder, 24 wt% solvent, 5 wt% organic binder, and 0.5 wt% additive. The method of claim 7, wherein Wherein the paste contains 69.5 wt% glass powder, 24 wt% solvent, 5 wt% organic binder, 0.5 wt% first additive, and 1 wt% second additive Method for manufacturing partition wall for display device.