KR100396375B1 - A method of manufacturing barrier rib for plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a partition wall for a plasma display panel, the method comprising: a first step of manufacturing a water repellent mold having an opposite shape of a partition wall on a plastic film substrate; a second step of filling the water barrier mold with a barrier material; A third step of hardening a material to produce a partition wall, a fourth step of printing an electrode on the partition wall, a fifth step of adhering a substrate to the partition wall on which the electrode is printed, and a water repellent mold and a plastic film from the partition wall to which the substrate is bonded A plasma display panel partition is manufactured through a sixth step of removing the substrate and a seventh step of firing the partition wall from which the water-receiving mold and the plastic film substrate are removed. Unlike the conventional method, the present invention can be produced in a continuous process and can be easily molded even in a very minute shape, so that it is possible to easily cope with the high-definition shape used in the HD (high definition) class. Compared to the bulkhead manufacturing process, it is possible to secure mass production, which enables low-cost production.

Description

A method of manufacturing barrier rib for plasma display panel

[TECHNICAL FIELD OF THE INVENTION]

The present invention relates to a method for manufacturing a partition wall for a plasma display panel, and more particularly, a first step of manufacturing a water repellent mold having an opposite shape of the partition wall on a plastic film substrate, a second step of filling the barrier material into the water repellent mold, A third step of hardening the filled partition material to produce a partition wall, a fourth step of printing an electrode on the partition wall, a fifth step of adhering a substrate to the partition wall on which the electrode is printed, and a resin from the partition wall to which the substrate is bonded The present invention relates to a method for manufacturing a plasma display panel partition wall through a sixth step of removing the mold and the plastic film substrate and a seventh step of firing the partition wall from which the water-receiving mold and the plastic film substrate are removed.

[Private Technology]

According to the prior art, in the method of manufacturing a partition wall of a plasma display panel, a screen print method, a sand blast method, a photosensitive paste method, and an additive method are generally used to form fine partition walls of a plasma display. ) Or the squeezing method.

The squeegeeing method, which is a method of manufacturing a product by heating and compressing a paste into a mold having an opposite shape of a product, has been disclosed in Japanese Patent Application Laid-open No. Hei 10-214559 and Japanese Patent Application Laid-open No. Hei 10-208628. The patent application discloses a method of compressing a partition wall and a method of filling the partition material into a mold and thermally curing the partition material to form the partition wall material.

In addition, when the bulkhead material is filled in the mold, the mold is finally formed by using a thermoplastic resin and the thermoplastic mold and the bulkhead material are simultaneously fired to form the partition wall and the material is filled in the molding mold and used as a back plate on the filling material. A method of adhering a glass substrate to separate a mold and firing a partition wall adhered to glass is disclosed in Japanese Laid-Open Patent Publication No. Hei 1-3737534 and Japanese Laid-open Patent Publication Hei 5-334956.

In addition, the squeezing method of compressing and molding into a mold forms a paste on a substrate and dried it, or prepares a ceramic tape in which inorganic and organic materials, such as ceramics or glass particles, are mixed on a substrate to heat the substrate and pressurizes the paste. A method of forming a partition wall by forming a partition wall, removing the mold from the substrate on which the partition wall is formed, cooling the substrate on which the partition wall is formed, and baking at an appropriate firing temperature. The method is described in detail in Korean Patent Publication No. 1997-027537 of LG Electronics.

In addition, the plasma display device of WO 98/49706 of SARNOFF Co. has been described by a squeegeeing method in which a material formed on a substrate is used using a green ceramic tape. The substrate used in this patent describes a method for producing a green ceramic tape in which the coefficient of thermal expansion of the green ceramic tape coincides with the substrate used to use the metal substrate. On the other hand, the Japanese Kyocera patent mentioned above also proposed a partition wall forming method using the squeegeeing method.

However, the conventional method of manufacturing a partition wall of the plasma display panel has the following problems.

First, in the case of the screen printing method, since the thickness of the printing film is limited per one time, it is difficult to obtain the height of the bulkhead to be repeatedly obtained and finally obtained in a short time. In addition, the screen printing method requires a high level of product production rate for raw materials that require precise printing every time in order to form a constant height, and it is easy to deform the bulkhead during printing, and the high precision of the bulkhead due to the increase of printing plates. Cannot be satisfied.

Second, in the sandblasting method, the process is complicated and precise development using a photoresist is required, and defects in the partition wall from the undeveloped portion are likely to occur. Therefore, it is difficult to produce a stable product due to a low product production rate and a decrease in abrasive force due to aging of the abrasive or a change in the abrasive over time.

Third, the addition method and the photosensitive paste method are advantageous for high-precision bulkhead molding, but are not suitable for mass production due to the complicated process and loss of raw materials.

Fourth, in the case of the pressing method is a whole is relatively a simple way being the manufacturing partition walls is considered the firing contraction ratio is the partition wall height before firing is molded in a single initial low, and the molding pressure is high, the compression degree 130 Kg / cm ² when compressed Uniform pressure is hardly applied to the surface, so the uneven pressure is generated. In addition, there is a limit to the molding method for reducing the pitch, which is the distance between the partition walls, and increasing the height of the partition walls. That is, it is disadvantageous in improving a luminous efficiency and manufacturing a back plate used in a high definition plasma display panel in the future.

Fifth, in the method of filling the partition material into the mold, it is difficult to produce a good product because there is a risk of damage to the partition wall when separated from the mold. In order to solve the problem of breakage of the barrier rib, a method of filling the barrier material by using a mold of thermoplastic plastic and simultaneously firing the barrier material has been attempted. . In addition, there is a difficulty in manufacturing a mold of the thermoplastic plastic, and the amount of sintered when the plastic is fired is high, the sintering efficiency is bad, and there is a problem in that the final product has a large amount of carbon remaining after sintering.

Accordingly, an object of the present invention is to provide a plasma display panel bulkhead manufacturing method for producing a high-definition bulkhead by producing a bulkhead by manufacturing a partition wall by a continuous process to solve the above problems. do.

1 is a process cross-sectional view showing the overall steps of the method for manufacturing a partition wall for a plasma display panel according to the present invention;

2 is a cross-sectional view of a process of manufacturing a water-repellent mold having an opposite shape of a partition wall on a plastic film substrate;

3 is a cross-sectional view of the step of filling the barrier material in the now-type film and drying and curing.

Figure 4 is a cross-sectional view of the process of printing the electrode on the cured partition wall,

5 is a cross-sectional view of a process in which a soda-lime-based glass plate or a titanium metal plate is joined to a partition wall,

6 is a cross-sectional view illustrating a process of removing a water repellent mold from a partition wall in which a substrate is joined;

7 is a cross-sectional view of printing a black pigment at the end of the partition wall,

8 is a cross-sectional view of a partition substrate on which black pigment is printed at the end of the partition wall,

9 is a cross-sectional view of a partition board to which black pigment is added to the partition material itself.

Explanation of symbols on the main parts of the drawings

101: ultraviolet and electromagnetic radiation curing apparatus, 102: plastic film base material, 103: resin for resin mold, 104: partition roller, 105: partition material, 106: coater, 107: drying and curing process, 108: Screen roller, 109: hot pressing, 110: lamination roller, 111: water-type film, 112: black pigment, 113: gravure printing roller, 114: firing furnace, 115: soda-lime glass or titanium plate, 511: bulkhead, 512: Black pigment, 513: adhesive layer, 514: partition with black pigment, 515: electrode

In order to achieve the above object, the present invention provides a water -retaining mold having an opposite shape of a partition on a thermoplastic plastic film substrate selected from the group consisting of polyethylene terephthalate, polyvinyl alcohol, vinyl chloride resin, polycarbonate, polyethylene, and polypropylene. First step; A second step of filling the barrier material including 50 to 90% by weight of an inorganic material in the water current type; A third step of manufacturing the barrier rib by curing the filled barrier rib material; A fourth step of printing an electrode on the partition wall; A fifth step of adhering the substrate to the barrier rib on which the electrode is printed; A sixth step of removing the water repellent mold and the plastic film substrate from the partition wall to which the substrate is bonded; And a seventh step of firing the partition wall from which the water-receiving type and the thermoplastic plastic film substrate are removed at a temperature of 400 to 500 ° C.

Hereinafter, the present invention will be described in detail.

1 is a cross-sectional view of an entire process showing a method for manufacturing a partition wall for a plasma display panel according to the present invention. In FIG. 1, a series of processes are continuously performed by manufacturing the water repellent mold 103 having the opposite shape of the partition on the plastic film substrate 102 and then passing through the process including each step of the present invention to the final firing 114. Disclosed is a method of manufacturing a partition wall for a plasma display panel.

FIG. 2 illustrates a step of manufacturing a water receiving mold 103 having an opposite shape of the partition wall on the plastic film substrate 102 which is the first step of the method for manufacturing the partition wall for plasma display panel. In the present invention, the plastic film base 102 is preferably a thermoplastic plastic film. More preferably, the thermoplastic plastic film is preferably selected from the group consisting of polyethylene terephthalate, polyvinyl alcohol, vinyl chloride resin, polyethylene, polypropylene and polycarbonate.

In addition, the thickness of the plastic film substrate 102 is preferably 5 to 200 microns, more preferably 10 to 25 microns of film. When the thickness of the plastic film substrate 102 exceeds 200 microns, there is a problem that the thickness of the film substrate is excessively thick, and when the thickness of the plastic film substrate 102 is less than 5 microns, there is a problem in that it does not have mechanical strength.

In addition, the resin used in the suze mold 103 is preferably a resin that is cured by ultraviolet rays or electromagnetic radiation, and the resin is excellent in mold release due to the characteristics of the process of the present invention, and adhesive force is applied to the plastic film base 102. Excellent is good.

In addition, in the present invention, the method of manufacturing the water-receiving mold 103 having the opposite shape of the partition wall on the plastic film base 102 is made by using a molding roller 104 having a partition wall engraved on the plastic film base to which the resin for mold is bonded. It is preferable to manufacture the die 103. The forming roller 104 is made of a metal having excellent compressive strength and hardness, it is preferable that a heating element for heating the roller is inserted in the forming roller. In addition, the forming roller 104 is to manufacture a metal plate mold having a partition wall shape using a nickel pole after processing the product shape on a metal or plastic material of a flat plate, and winding the mold on the forming roller 104 to produce Preferably, the plastic material is preferably a polymethyl methacrylate plate produced by a casting process. In addition, the surface of the forming roller 104 is preferably coated with a metal having excellent durability and releasability or an organic material having hydrophobicity on the surface. More preferably, the metal is chromium, and the organic material is preferably ceramic or Teflon. In addition, the thickness of the coating layer during the coating is preferably 1 to 5 microns. In addition, the forming roller 104 is preferably 30 to 70 ° C, more preferably 40 ° C, which is a temperature suitable for maintaining mold release property with the water repellent die 103.

In addition, the present invention may further include a curing step of curing the sujeu mold 103 in the first step, the curing apparatus 101 used in the curing process is UV or electromagnetic radiation curing apparatus in relation to the suze mold Is preferably.

In the second step, the barrier rib material 105 is filled in the water receiving mold 103 in the second step. FIG. 3 shows the second and third steps of the present invention in which the barrier material 105 is filled in the water repellent film 103 and the barrier material 105 is cured. In the present invention, it is preferable that the barrier material 105 uses a slurry prepared by mixing an inorganic material including ceramic powder and glass frit with an organic binder in a small amount of solvent. In addition, the organic binder and the inorganic material of the barrier material 105 are lower than the transition point (Tg) temperature of the soda-lime-based glass substrate when the substrate used as the substrate is a soda-lime-based glass substrate. It is preferable to melt at 400-500 degreeC which is a temperature, and when the base material used as a board | substrate is a titanium metal plate, it is preferable to melt to 700 degreeC. In addition, the partition material 105 preferably contains 50 to 90% by weight of an inorganic material. In addition, the organic binder is preferably using a photo-curable organic material. When the photocurable organic material is used as an organic binder, there is an advantage of compensating for the problem of collapse of the partition wall. In addition, the partition material 105 may include a black pigment, and when the partition material 105 includes the black pigment, there is an advantage in that contrast may be realized on a screen even if a separate process is not performed.

In the present invention, as the method of filling the barrier material 105 into the water repellent mold 103, general methods of filling the barrier material into a mold may be used, but the present invention may include a coater 106 for a continuous process. It is preferable to use.

In addition, the present invention may further include a drying step of removing the solvent contained in the partition material 105 by drying the partition material 105 filled in the water-receiving mold 103 between the second step and the third step. . The drying is preferably a convection oven, more preferably if the drying temperature of the oven is 60 to 150 ℃.

The third step of the present invention is a step of manufacturing the partition wall by hardening 107 the partition material 105 filled in the sujeuk 103 in the second step. In the present invention, the hardening 107 is preferably selected to be suitable for the hardening of the partition material, particularly preferably by using ultraviolet rays or electromagnetic radiation. More preferably, the ultraviolet rays are obtained by using a metal halide lamp having 365 nm as the main wavelength band. It is also possible to use a lamp of 400 nm or more whose wavelength is in the visible range. In addition, the use of electromagnetic radiation has the advantage of uniformly curing the thick bulkhead paste of about 380 microns. In addition, the curing methods may be used in combination.

The fourth step of the present invention is the step of printing the electrode on the partition hardened by the curing 107. 4 shows the process of the fourth step. The electrode printing may use a method of intermittently performing screen printing or a method of continuously performing roll screen printing. In the case of continuous roll screen printing, the second to fourth steps of the present invention may be performed collectively by a continuous process. It is preferable that the material of the electrode printed by this invention is silver paste. Electrode printing in Figure 4 shows that the electrode is printed on the partition wall by the screen printing roller 108.

In another aspect, the present invention includes the step of adhering the substrate to the barrier rib printed with the electrode. 5 shows a process of attaching a substrate to a partition wall. Preferably, the substrate is a soda-lime-based glass or a titanium metal plate, preferably a high softening point. In addition, as a method of attaching the substrate to the partition wall, a method of applying an adhesive to the substrate and laminating the plastic film 102 on which the partition wall is formed and the substrate between two rollers may be used or the press 109 may be used. It is preferable to use the method of heat-sealing by means of. In addition, among the two rollers used for the lamination, the roller which touches the partition wall has a Showa hardness of 60 or less, and the adhesive applied to the substrate is selected from the group consisting of polybutyral, epoxy, polyvinyl alcohol, and acrylic. Preferably, the temperature of the heat to be applied in the case of using the heat fusion method by the press 109 is preferably 50 to 150 ° C.

In addition, the present invention includes the step of removing the water receiving mold 103 and the plastic film substrate 102 from the partition wall to which the substrate is bonded as a sixth step. 6 is a sectional view showing a sixth step process. Conventional methods may be used to remove the water repellent mold 103 and the plastic film substrate 102 from the partition wall to which the substrate is adhered. Preferably, the water repellent mold 103 is removed by applying heat to the matched substrate. It is preferable that the temperature of the said heat | fever added is 50-150 degreeC.

In addition, the present invention may further include a process of printing the black pigment 112 on the partition wall adhered to the substrate to implement the contrast. 7 shows a process of printing the assay pigment 112. The printing process may be a method of continuously printing by the gravure printing roller 113 or a method of screen printing intermittently.

8 and 9 illustrate partition walls formed according to a method of providing contrast to partition walls. The partition wall by gravure printing is shown in FIG. 8, and the partition wall which black pigment was put into the partition material paste is shown in FIG. The partition wall on which the assay pigment 112 is printed is subjected to a firing process which is the last step of the present invention in a firing furnace.

The final step of the present invention is the step of firing the partition wall from which the water repellent mold 103 and the plastic film substrate 102 are removed. The firing process may be conventional methods used for firing the substrate. Preferably, after heating up to 400 ° C. at 3 ° C. per minute at room temperature, the temperature is maintained at the temperature for 30 minutes, the temperature is raised to 750 ° C. at 40 ° C., and maintained at 750 ° C. for 40 minutes. The firing step of the present invention has the advantage that the energy required for firing is reduced compared to the prior art by firing the partition wall from which the suze mold 103 and the plastic film base 102 are removed.

As described above, the method for manufacturing a partition wall of the plasma display according to the present invention is to produce a bulkhead by a continuous process, thereby achieving better mass production and lowering the cost than a conventional manufacturing method according to the intermittent method, and forming a slurry mold. It is easy to manufacture HD grade bulkheads by using the filling method in the high-definition shape, that is, the distance between the partition walls and the height of the partition walls are high.

Claims (28)

(correction) A first step of producing a water-repellent mold having an opposite shape of a partition on a thermoplastic film base material selected from the group consisting of polyethylene terephthalate, polyvinyl alcohol, vinyl chloride resin, polycarbonate, polyethylene and polypropylene ; A second step of filling the barrier material including 50 to 90% by weight of an inorganic material in the water current type; A third step of manufacturing the barrier rib by curing the filled barrier rib material; A fourth step of printing an electrode on the partition wall; A fifth step of adhering the substrate to the barrier rib on which the electrode is printed; A sixth step of removing the water repellent mold and the plastic film substrate from the partition wall to which the substrate is bonded; And A seventh step of firing the partition wall from which the water repellent type and the thermoplastic plastic film substrate are removed at a temperature of 400 to 500 ° C Bulkhead manufacturing method for a plasma display panel comprising a. The method of claim 1, further comprising printing a black pigment on the upper surface of the barrier rib from which the water-receiving type and the plastic film substrate are removed between the sixth and seventh steps. . (delete) (delete) The method of claim 1 or 2, wherein the thickness of the plastic film substrate is 5 to 200 microns. The method according to claim 1 or 2, wherein the method of manufacturing a water-receiving mold having the opposite shape of the partition wall on the substrate of the plastic film is manufactured by using a molding roller in which the partition wall shape is engraved on the plastic film substrate to which the mold resin is bonded. A barrier rib manufacturing method for a plasma display panel. The forming roller according to claim 6, wherein the forming roller is manufactured by manufacturing a metal plate mold of a product shape by using a nickel pole and then rolling the mold on a roller after processing the product into a shape of a product on a flat metal or plastic material. A method for manufacturing a partition wall for a plasma display panel, characterized in that. 8. The method of claim 7, wherein the plastic material of the flat plate used in the forming roller is a polymethyl methacrylate plate produced in a casting process. The method of claim 6, wherein the forming roller has a temperature of 30 to 70 ° C. The method for manufacturing a partition wall for plasma display panel according to claim 1 or 2, wherein the resin used in the water-receiving type is a resin cured by ultraviolet rays or electromagnetic rays. (delete) (delete) The method of claim 1 or 2, further comprising the step of removing the solvent contained in the barrier material by drying the barrier material filled in the water barrier type between the second step and the third step, wherein the drying is convection. An oven of the type is used, and the drying temperature of the oven is 60 to 150 ℃ characterized in that the partition wall manufacturing method for a plasma display panel. (delete) The method of claim 1 or 2, wherein the hardening of the third step is performed by ultraviolet rays or electromagnetic rays. 16. The method of claim 15, wherein the curing is performed by using a metal halide lamp, a high pressure mercury lamp, or an electromagnetic radiation device having an ultraviolet wavelength of 365 nm. 2. The method for manufacturing a partition wall for plasma display panel according to claim 1, wherein the electrode is printed after the drying and hardening of the partition wall material filled in the water barrier type is a continuous batch process. The method of manufacturing a partition wall for plasma display panel according to claim 1 or 2, wherein the step of printing the electrode is a roll screen printing method or an intermittent method. The method of claim 1, wherein the material of the printed electrode is silver paste. The method of claim 1, wherein the substrate used in the fifth step is a soda-lime-based glass or a titanium metal plate. (correction) The method of claim 1 or 2, wherein the method of adhering the substrate to the partition wall on which the electrode of the fifth step is printed is selected from the group consisting of polyvinyl butyral, epoxy, polyvinyl alcohol and acryl based on the substrate. A method of manufacturing a partition wall for a plasma display panel, by applying an adhesive and laminating the surface of the partition material on which the electrode is printed and the substrate between two rollers to be in close contact or laminating by press. (delete) (delete) (correction) The method of claim 1 or 2, wherein in the sixth step, the method of removing the water-receiving mold matched to the substrate is removed by applying heat to a substrate having the water-receiving mold at a temperature of 50 to 150 ° C. Method of manufacturing partition walls for plasma display panels. (delete) The method of claim 2, wherein the black pigment is printed on the upper surface of the partition wall by a screen printing method or a gravure printing method. The method of claim 1, wherein the barrier material contains a black pigment. The method of claim 1 or 2, wherein the first to seventh steps comprise a continuous batch process.