KR100260365B1 - Manufacturing method of DC plasma display panel - Google Patents

Abstract

PURPOSE: A method for manufacturing a plasma display panel of a direct current type is provided to obtain fluorescent efficiency of high luminance by preventing a flowing effect of a fluorescent material to an upper portion of an electrode. CONSTITUTION: A multitude of barrier rib(14) is formed on a transparent substrate(11) in order to define electrodes(12), a dielectric(13), and an independent discharge space. A protective pillar is formed on the electrodes(12). A fluorescent material(16) is applied on the discharge space between the barrier ribs(14). The fluorescent material(16) is dried and plasticized. The protective pillar is removed when the plasticizing process for the fluorescent material(16) is performed.

Description

Manufacturing method of DC plasma display panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a method of manufacturing a direct current type plasma display panel capable of obtaining high brightness.

Plasma Display Panel (PDP), which is one of the flat panel display devices, consists of an array of discharge cells that can be discharged independently, and discharges each discharge cell independently according to an electrical signal applied from the outside. The desired video signal is reproduced.

Since the overall thickness of the PDP can be less than 1 cm, the thickness and weight of the PDP can be remarkably reduced compared to the CRT display device using an electron gun. In addition, the narrow viewing angle of the liquid crystal display can be improved. Has

In addition, the PDP has a structure in which two light-transmissive substrates each having electrodes are bonded to each other, and a barrier rib interposed therebetween to define independent discharge spaces and to suppress crosstalk between pixels. By constructing a wide interval of), there is an advantage that can easily manufacture a large-screen display device.

1 is a cross-sectional view showing a direct current type PDP according to the prior art. As shown, the direct current type PDP includes a back substrate 1 having an anode 2 and partition walls 4 formed thereon, and a cathode 7 formed thereon. The front substrate 6 is bonded. Here, the anode 2 formed on the back substrate 1 has a form in which a predetermined voltage is transmitted and a bus electrode 2a covered by the dielectric layer 3 and a dot electrode 2b exposed in the discharge space are integrated. to be.

Subsequently, on the side of the partition 4 and the dielectric layer 3, a phosphor 5 for realizing colorization is applied within a range in which the upper surface of the dot electrode 2a is not covered, and argon ( A discharge gas (not shown) such as Ar), neon Ne or xenon Xe is encapsulated.

2A to 2C are cross-sectional views of a series of processes for explaining a method of manufacturing a DC-type PDP according to the prior art. Here, the same parts as in Fig. 1 are denoted by the same reference numerals.

First, as shown in FIG. 2A, the anodes 2 and the dielectric layer 3 are formed on the back substrate 1 by a conventional method, for example, a printing method, and then an independent discharge space is defined. The partitions 4 are formed for this purpose. At this time, since the surface of the electrode must be exposed in order to cause the discharge, the dielectric layer 3 is formed so as not to cover the upper surface of the anode (2).

Then, as shown in FIG. 2B, the phosphor 5 for realizing colorization is applied to the dielectric layer 3 and the partial side portions of the partition wall 4, and then, as shown in FIG. 2C, the phosphor 5 ) And complete the formation of the back substrate of the direct current type PDP.

Subsequently, although not shown, a front substrate having a negative electrode is manufactured through a conventional process, and the back substrate and the front substrate are bonded to produce a direct current type PDP.

However, in general, in order to increase the light emitting area of the PDP, the coating area of the phosphor should be widened. As shown in FIG. 2B, the conventional phosphor coating method makes it difficult to apply the phosphor to the side surface of the partition wall. Of course, there is a problem that can not obtain the area, thereby obtaining a high brightness.

In addition, since the phosphor is applied in a paste state, when a large amount of phosphor is applied in order to apply the phosphor to the side surface of the partition wall, the phosphor coated on the side surface of the partition wall flows down to cover the upper surface of the electrode. There was a problem that the manufacturing yield of the.

Accordingly, the present invention has been proposed to solve the above problems, and does not cover the upper surface of the electrode and at the same time increases the light emitting area to provide a manufacturing method of a direct current-type PDP to obtain a high brightness luminous efficiency. There is this.

1 is a cross-sectional view showing a conventional DC plasma display panel.

2A to 2C are cross-sectional views of a series of steps for explaining a method of manufacturing a plasma display panel according to the prior art.

3A to 3D are cross sectional views of a series of steps for explaining a method of manufacturing a direct-current plasma display panel according to a first embodiment of the present invention.

4A to 4C are cross-sectional views of a series of steps for explaining a method of manufacturing a DC plasma display panel according to a second embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

11 translucent substrate 12 electrode

13 dielectric 14 partition wall

15: protection pillar 16: phosphor

In order to achieve the above object, the present invention forms a protective pillar coated with a thin lubricant on the electrode in a state in which an electrode, a dielectric layer and a partition wall are formed on a substrate. Then, a phosphor is applied between the partitions at the same height as the partition wall, and the phosphor is dried and fired. Here, the lubricant applied to the protective pillar serves to prevent the phosphor from accumulating on the protective pillar while the phosphor is dried, and the protective pillar is completely burned upon firing the phosphor.

Therefore, since the phosphor can be applied to the side surface of the partition wall, the light emitting area can be increased, and since the upper surface of the electrode is prevented from being covered by the phosphor, it is possible to prevent a decrease in the production yield of the PDP.

In addition, the present invention uses a material to form a protective pillar on the electrode in the same state as the electrode, dielectric layer and partitions formed on the substrate, the material is easy to remove the alkaline solution. Subsequently, after the phosphors are applied to the same height as the barrier ribs between the barrier ribs, the phosphors are dried to expose the protective pillars, and then the protective pillars are removed using an alkaline solution, and then the dried phosphors are fired. .

As a result, the coating area of the phosphor can be increased in the same manner as described above, and accordingly, the light emitting area can be increased, and the upper surface of the electrode is prevented from being covered by the phosphor, thereby preventing a decrease in the production yield of the PDP. Can be.

(Example 1)

Hereinafter, a method of manufacturing a DC-type PDP according to a first embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3D.

3A to 3D are a series of cross-sectional views illustrating a method of manufacturing a DC-type PDP according to a first embodiment of the present invention. First, as shown in FIG. After forming the electrodes 12 and the dielectric layer 13 on them, the barrier ribs 14 are then formed to define independent discharge spaces on the substrate 11 and to prevent crosstalk between the pixels. Form.

Then, as shown in FIG. 3B, the protective pillar 15 is formed on the electrodes 12 by using a printing method or an exposure method. Here, the protective pillar 15 is formed of a photosensitive agent coated with a thin lubricant on the surface, or formed by containing a lubricant in the photosensitive agent.

Subsequently, as shown in FIG. 3C, the phosphor 16 is filled in the discharge space between the partitions 14 at the same height as the partition wall, and then, as shown in FIG. 3D, the phosphor 16 is dried and Fire. At this time, the lubricant applied to or contained in the protective pillar 15 serves to prevent the phosphor 16 from accumulating on the protective pillar 15 when the phosphor 16 is dried. Therefore, after drying of the phosphor, although not shown, the phosphor is not present on the protective pillar. In addition, the protective pillar is completely burned at the time of firing of the phosphor, so that the top surface of the electrode is exposed after the firing of the phosphor.

As a result, the fired phosphor is applied not only to the upper portion of the dielectric layer but also to the side portions of the partition walls, and also does not cover the upper surface of the electrode. Therefore, since the light emitting area in the discharge space becomes wider, the light emitting efficiency of the PDP can be improved, and the production yield of the PDP can be prevented.

(Example 2)

Hereinafter, a method of manufacturing a DC-type PDP according to a second embodiment of the present invention will be described in more detail with reference to FIGS. 4A to 4C.

4A to 4C are a series of cross-sectional views illustrating a method of manufacturing a DC-type PDP according to a second embodiment of the present invention. Here, the same parts as in FIG. 3 are indicated by the same reference numerals.

As shown in FIG. 4A, in the state where the electrodes 12, the dielectric layer 13, and the partitions 14 are formed on the light transmissive substrate 11 as in the previous embodiment, the protection on the electrodes 12 is performed. Form the column 15. At this time, the protective pillar 15 is formed of a material that can be removed with an alkaline solution, for example, a photosensitive paste or a photosensitive agent.

Then, as shown in FIG. 4B, the phosphor 16 is filled in the space between the partitions 14 to the same height as the partition wall 15 and then dried. Here, the phosphor 16 contains a large amount of volatile material therein so that its shrinkage rate becomes high during the drying process. Therefore, the volatile material is removed during drying of the phosphor 16, so that the thickness of the phosphor 16 filled between the partition walls 14 is reduced, and as shown, the top of the protective pillar 15 ( Top) part is exposed.

Subsequently, as shown in FIG. 4C, the exposed pillar 15 is completely removed with an alkaline solution, for example, any one selected from NaOH, KOH or Na ₂ CO ₃ , and then the phosphor 16 is removed. Firing results in a wide, uniform phosphor pattern as shown.

As described above, in the manufacturing method of the DC-type PDP according to the present invention, after forming a protective pillar on the electrodes, the phosphor is coated in the discharge space, and then the phosphor is dried and fired so that the phosphor is coated on the side surface of the partition wall. As a result, it is possible to increase the luminous efficiency of the PDP as well as to prevent the electrode from being covered by the phosphor, thereby preventing a decrease in the production yield of the PDP.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

Claims (7)

Providing a translucent substrate having electrodes and a dielectric layer and partition walls for defining independent discharge spaces; Forming protective pillars on the electrodes; Applying a phosphor to discharge spaces between the barrier ribs; And Drying and firing the phosphor; A method of manufacturing a direct-current plasma display panel, characterized in that the protective column is removed together with the phosphor upon firing. The method of claim 1, further comprising applying a thin layer of lubricant on the electrode before forming the protective pillar. The method of claim 1, wherein the protective pillar is formed of a photosensitive agent containing a lubricant. The method of manufacturing a direct-current plasma display panel according to claim 2 or 3, wherein the protective column is formed by a printing method or an exposure method. Providing a translucent substrate having electrodes and a dielectric layer and partition walls for defining independent discharge spaces; Forming protective pillars on the electrodes; Applying a phosphor to discharge spaces between the barrier ribs; Drying the phosphor to expose the protective pillar; Removing the exposed protective pillar; And And firing the dried phosphor. The method of claim 5, wherein the protective pillar is formed of a photosensitive agent or a photosensitive agent paste. The method of claim 5, wherein the protective column is removed by any one of an alkali solution selected from NaOH, KOH, or Na ₂ CO ₃ .

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