KR20010004117A - Method for forming barrier rib in plasma display panel - Google Patents

Abstract

PURPOSE: A method for forming a barrier rib of a plasma display panel is provided to reduce a production cost by using a powder state material as a barrier rib material. CONSTITUTION: For forming a barrier rib of a plasma display panel, first an ignitible frame having a support plate(10), a spacer(20) disposed on the support plate, and an outer wall disposed at a rim thereof is formed. The barrier rib material is charged in a charging space(A) formed by the spacer of the ignitable frame. The ignitable frame is aligned with a rear side substrate, and is attached to it. The ignitable frame burns by performing a plastisizing process to form the barrier rib. The barrier rib material includes a paste, alumina, and titanium dioxide etc. Since the ignitable frame capable of controlling the shape and the size of the barrier rib is used, it is possible to correspondent to the high degree fineness of HDTV. Also, it is possible to use a powder shaped material as the barrier rib material, thereby reducing a production cost.

Description

Method for forming barrier rib in plasma display panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) manufacturing technology, and more particularly, to a method of forming a barrier rib of a plasma display panel.

PDP is a device that displays characters or images by using light emitted from plasma generated during gas discharge, and is also called a gas discharge display device. PDP is largely exposed to direct plasma because the electrode used to apply external voltage to form plasma is directly exposed because the direct current (DC) type and conduction current flowing through the electrode are covered with dielectric. Therefore, it is classified into AC type through which displacement current flows. In addition, according to the electrode structure of the discharge cell, it is classified into a counter discharge type, a surface discharge type, a barrier discharge type, and the like. In the case of directly using the visible light emitted from the discharge gas, it is mostly used in a monochromatic display PDP device. There is a PDP using orange color, and when full color display is required, ultraviolet light emitted from discharge gas such as Kr or Xe excites red (R), green (G) and blue (B) phosphors. Visible light is used. Among various flat panel displays, PDP is attracting attention as a display device that can realize a large screen, but it is still produced due to low brightness and contrast ratio, high driving voltage, low power consumption efficiency, and difficult manufacturing process technology due to large size. There is a problem that the yield is low, there is a problem that the low price should be made in addition to the improvement of the above characteristics.

In the case of the surface discharge type AC PDP which is currently mainstream, a transparent electrode, a bus electrode, a transparent dielectric, a dielectric protective film, and a black stripe are formed on the front plate, and an address electrode, a white dielectric, a partition wall, etc. are formed on the back plate. Is formed. Phosphors for realizing color in the PDP are formed on the front plate for the transmissive type and on the back plate for the reflective type.

At present, there are a printing method, a sand blast method, an additive method, a press method and the like as a method of forming a partition on the PDP back plate.

The printing method is widely used due to the simple production facilities and the high efficiency of using the materials.However, to form the bulkhead with the height of 120㎛ or more, the printing should be repeated about 10 times, and the environmental changes such as temperature and humidity during manufacturing It is sensitive to and difficult to form a high definition bulkhead.

Sandblasting method is a partition wall by spraying and then left for a photosensitive coating material, only the portion to be a partition wall formed by applying a photosensitive coating thereon, and then applying the barrier rib material on a substrate, Al ₂ 0 _3, the compressed air containing abrasive of SiC, etc. It is a method of removing the part which is not formed. This method has the advantages of relatively simple manufacturing process and high productivity compared to printing method, but it is expensive to invest in equipment, it is difficult to make bulkhead less than 50㎛ and more than 90% of used paste is treated as waste. There are disadvantages.

The additive method is a method of coating a photoresist having a height of a partition to be formed and then selectively removing a region where a partition is to be formed, and then removing the photoresist after filling the partition paste. This method requires exposing, developing, and removing the photoresist at least three times in order to make a barrier with a thickness of about 150 μm, and there is a problem that the material price is relatively expensive, and the photoresist remains even after the formed pattern is torn down or fired.

The press method was recently published by Kyocera Co., Ltd. in Japan, and is a method of forming a partition by applying a partition paste to a glass substrate and then pressing it with a press. In this method, there is a possibility that the partition wall is damaged in the process of separating the mold from the substrate after applying pressure.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for forming a partition wall of a plasma display panel that can overcome the problems of existing partition wall forming processes such as a printing method, a sand blast method, an additive method, and a press method.

1 is a perspective view schematically showing a combustible mold applied to an embodiment of the present invention.

2 is a schematic plan view of the combustible mold shown in FIG.

3 is a flow chart of a back plate forming process according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10: support plate

20: spacer

30: outer wall

The present invention is a technique for filling a partition wall material into a combustible frame in which the partition shape is engraved, firing the partition wall material by firing process, and burning the combustible frame to remove it. At this time, the flammable mold is composed of a material which is burned during the partition wall firing process and does not leave a residue during combustion. As the partition material, existing printing paste or inorganic powder may be used as it is.

In order to solve the above technical problem, the present invention provides a method for forming a partition wall of a plasma display panel in which a partition is formed on a rear substrate having a predetermined lower layer process, the method comprising: filling a partition wall material in a flammable frame having a partition shape engraved therein; ; Aligning the flammable mold with the rear substrate; Bonding the combustible mold and the back substrate to each other; And performing a sintering process to burn the flammable mold and to form a partition wall.

In addition, the present invention provides a method of forming a partition of a plasma display panel for forming a partition on a rear substrate having a predetermined lower layer process, the method comprising: aligning the rear substrate with a combustible frame having a partition shape engraved therein; Bonding the combustible mold and the back substrate to each other; Filling a partition wall material into the combustible frame; And performing a sintering process to burn the flammable mold and to form a partition wall.

Hereinafter, preferred embodiments of the present invention will be introduced in order to enable those skilled in the art to more easily carry out the present invention.

1 is a perspective view schematically showing a combustible mold applied to an embodiment of the present invention, and FIG. 2 is a schematic plan view of the combustible mold shown in FIG. 1.

As shown, the flammable frame includes a support plate 10, a spacer 20 disposed on the support plate 10 to provide a partition filling space A having a shape in which the partition is inverted, and an edge of the flammable frame. It consists of the outer wall 30 arrange | positioned at. The material constituting the flammable mold may be any one at a temperature of about 600 ° C. or lower, i.e., if it is completely burned in the bulkhead firing process so that no residue remains. For example, a thermosetting resin, paper or the like can be used. In addition, in some cases, as a material constituting the support plate 10 and the outer wall 30, a material that does not burn during the firing process may be used, and in this case, recycling may be possible.

The partition wall material is filled in the space for filling the partition wall material of the accompanying drawings. Existing printing pastes can be used as the partition wall material, and the flammable mold maintains its shape, so inorganic powders such as alumina (Al ₂ 0 ₃ ), titanium dioxide (TiO ₂ ) and glass frit can be used as they are. have.

3 is a flow chart of a back plate forming process according to an embodiment of the present invention, using the flammable mold shown in FIGS. 1 and 2.

In the process according to the present embodiment, first, an address electrode is formed on a rear substrate (100), and a white dielectric is formed on the entire structure (110). Next, a partition formation process is performed.

On the other hand, the partition wall formation process, first, filling the partition wall material in the flammable mold (120). In this case, as the barrier material, an inorganic powder such as conventional printing paste, alumina (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), glass raw material, or the like may be used.

Next, the back plate on which the address electrode and the white dielectric are formed and the combustible mold are aligned and bonded (130). At this time, the flammable frame should be positioned below and the back plate should be positioned above. In this way, not only the existing printing paste but also the bulkhead material in the powder state can be used. The use of bulkhead material in powder form can greatly reduce the material cost because no expensive paste is used.

Finally, the ignited flammable mold and the back plate are put into a firing furnace to proceed with firing (140). Through the firing process, the combustible mold is combusted and partition walls are formed. If a bulkhead is used in powder form, the flammable mold must maintain its shape up to a certain temperature and then be burned so that the bulkhead material in powder form does not collapse and form a bulkhead shape. The flammable mold that plays this role can be made using a thermosetting resin.

Another embodiment of the present invention is to form an address electrode and a white dielectric on the rear substrate, fill the partition wall material while the combustible frame is aligned and bonded to the rear plate, and then form the partition wall through a firing process. What is different from the above embodiment is that in the embodiment, the flammable mold is aligned and bonded to the back plate while the flammable material is filled with the partition wall, whereas in the present embodiment, the combustible mold is aligned and bonded to the back plate. Afterwards, the bulkhead is filled.

In this case, a scraper of a printing press or a doctor blade of a tape casting equipment can be used to planarize the filled paste (or inorganic powder), so that expensive equipment is not required. Can be greatly reduced.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

Since the present invention uses a flammable frame that can form a partition in a desired shape and dimensions, it is possible to cope with high-definition television (HDTV) -class high definition, and the powder state can be used as a partition material to be filled in a flammable frame, thereby producing a unit cost. The effect can be expected to significantly lower.

Claims (14)

In the method of forming a partition of a plasma display panel, the partition is formed on a back substrate having a predetermined lower layer process. Filling the partition wall material into a combustible frame having the partition shape engraved therein; Aligning the flammable mold with the rear substrate; Bonding the combustible mold and the back substrate to each other; And Performing a sintering process to combust the flammable mold and form a partition A partition wall forming method of a plasma display panel comprising a. The method of claim 1, The flammable frame, Plasma display comprising a support member, a spacer member disposed on the support member to provide a space for filling the partition wall material having the shape of the partition wall upside down, and an outer wall member disposed on the edge of the flammable frame Method of forming partition walls of panels. The method according to claim 1 or 2, The flammable frame, A method of forming a partition wall of a plasma display panel, comprising: a material which is burned at a temperature of 600 ° C. or less and no residue remains after combustion. The method of claim 3, The flammable frame, A partition wall forming method of a plasma display panel comprising a thermosetting resin or paper. The method according to claim 1 or 2, The partition wall material, A partitioning method for forming a plasma display panel, which is a printing paste or an inorganic powder. The method of claim 5, And wherein the inorganic powder comprises at least one of alumina (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), and a glass raw material. The method according to claim 1 or 2, In the step of filling the partition wall material in the combustible frame, Method for forming a partition of the plasma display panel using a doctor blade of a scraper or tape casting equipment of the printing machine to planarize the filled partition wall material. In the method of forming a partition of a plasma display panel, the partition is formed on a back substrate having a predetermined lower layer process. Aligning the rear substrate with the combustible frame having the engraved partition shape; Bonding the combustible mold and the back substrate to each other; Filling a partition wall material into the combustible frame; And Performing a sintering process to combust the flammable mold and form a partition A partition wall forming method of a plasma display panel comprising a. The method of claim 8, The flammable frame, Plasma display comprising a support member, a spacer member disposed on the support member to provide a space for filling the partition wall material having the shape of the partition wall upside down, and an outer wall member disposed on the edge of the flammable frame Method of forming partition walls of panels. The method according to claim 8 or 9, The flammable frame, A method of forming a partition wall of a plasma display panel, comprising: a material which is burned at a temperature of 600 ° C. or less and no residue remains after combustion. The method of claim 10, The flammable frame, A partition wall forming method of a plasma display panel comprising a thermosetting resin or paper. The method according to claim 8 or 9, The partition wall material, A partitioning method for forming a plasma display panel, which is a printing paste or an inorganic powder. The method of claim 12, And wherein the inorganic powder comprises at least one of alumina (Al ₂ O ₃ ), titanium dioxide (TiO ₂ ), and a glass raw material. The method according to claim 8 or 9, In the step of filling the partition wall material in the combustible frame, Method for forming a partition of the plasma display panel using a doctor blade of a scraper or tape casting equipment of the printing machine to planarize the filled partition wall material.