KR20040092684A - Method of forming barrier rib in plasma display - Google Patents

Abstract

PURPOSE: A method for forming a barrier rib of PDP is provided to reduce a manufacturing cost and time by eliminating a tip created at an end part when forming the barrier rib. CONSTITUTION: A method for forming a barrier rib of PDP comprises a step of preparing a glass paste and drying it on a rear substrate; a step of depositing a photosensitive film(24) having a narrow width at an end part on the glass paste; a step of removing the photosensitive film by using a sanding process; and a step of sintering the glass paste.

Description

Partition wall formation method of plasma display panel {METHOD OF FORMING BARRIER RIB IN PLASMA DISPLAY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a partition wall of a plasma display panel, and more particularly to a method for forming a partition wall of a plasma display panel that can prevent rising from an end portion of a partition wall.

Plasma Display Panels (PDPs) are display devices that generate visible light from a phosphor when vacuum ultraviolet rays generated by gas discharge excite the phosphor.

Plasma display panels (PDPs) are in the spotlight in the light of being thinner and lighter than the cathode ray tube (CRT), which has been mainly used as a display device, and capable of realizing a high-definition large screen.

The plasma display panel is composed of a plurality of discharge cells arranged in a matrix form, one discharge cell forms a pixel, the discharge cells gather to form the entire screen.

In general, a plasma display panel is divided into a direct current type and an alternating current type, among which an AC plasma display panel is currently mainstream.

1 is a view for explaining the structure of a conventional three-electrode AC surface discharge type plasma display panel.

Referring to FIG. 1, a plasma display panel includes a front substrate 10 on which an image is displayed, and a rear substrate 20 formed spaced apart from the front substrate 10 at a predetermined interval by a frit glass. Is sealed.

The front substrate 10 includes a common holding electrode Z, a scan holding electrode Y, and the common holding electrode Z and a scan holding electrode which are arranged in pairs to maintain light emission of cells by mutual discharge. A dielectric layer 12 for limiting the discharge current of (Y) and allowing each electrode to be insulated, and a protective layer 13 for preventing damage to the dielectric layer 12 and increasing the efficiency of secondary discharge are formed.

The back substrate 20 includes a plurality of address electrodes X for generating vacuum ultraviolet rays by performing address discharge at a portion crossing the common holding electrode Z and the scan holding electrode Y, and the plurality of address electrodes. A dielectric layer 22 to insulate (X), a partition wall 21 formed at one side of the dielectric layer 22 and arranged in parallel to form a plurality of discharge spaces, ie, cells, and the partition wall 21. The fluorescent layer 23 of each of R, G, and B is formed on the side surface of the side wall and between the partition wall 21 and the partition wall 21 to emit visible light.

In addition, the common holding electrode Z is formed between a transparent electrode (ITO electrode) Za, a bus electrode Zb made of a metal material, and is formed between the transparent electrode Za and the bus electrode Zb. In order to improve contrast as a conductive material, a black layer (B) made of ruthenium oxide and lead oxide or carbon series is formed.

In addition, the scan holding electrode Y is formed between a transparent electrode (ITO electrode) Ya, a bus electrode Yb made of a metal material, and is formed between the transparent electrode Ya and the bus electrode Yb. In order to improve contrast as a conductive material, a black layer (B) made of ruthenium oxide and lead oxide or carbon series is formed.

In addition, the discharge gas is filled between the front substrate 10 and the rear substrate 20 at a pressure of 300 ~ 400 Torr, the discharge gas is mainly based on He, Ne, Ar, or a mixture thereof as a penning mixture gas. A small amount of Xe gas is used as a source of vacuum ultraviolet light that forms a gas and emits the fluorescent layer 23.

Based on the above configuration, the operation of the conventional plasma display panel will be described.

2 is a view for explaining the operation of the conventional plasma display panel.

For reference, FIG. 2 is a view illustrating the rear substrate 20 rotated 90 degrees with respect to the front substrate 10 for convenience of description.

Referring to FIG. 2, the plasma display panel displays an image by an address display separator in which data writing periods and display periods are divided in time.

First, when a voltage of 150 V to 300 V is supplied between the scan sustain electrode Y and the address electrode X in an arbitrary discharge cell, lighting is performed inside the cell located between the scan sustain electrode Y and the address electrode X. (Writing) A discharge occurs so that wall charges are formed on the inner surface of the discharge space and remain as wall charges on the dielectric layer 12.

In the cells selected by the address discharge, sustain discharge is caused by an AC signal supplied to the common sustain electrode Z and the scan sustain electrode Y, and an electric field is generated in the cell by the discharge, whereby trace electrons in the discharge gas are generated. Accelerates.

Neutral particles in the accelerated electrons and gas collide with each other and are ionized to electrons and ions.Neutral particles are gradually ionized to electrons and ions due to another collision between the ionized electrons and the neutral particles, and the discharge gas is in a plasma state. At the same time, vacuum ultraviolet rays are generated.

The ultraviolet rays generated as described above excite the R, G, and B fluorescent layers 23 to generate visible light, and the visible light is emitted to the outside through the front substrate 10 to emit light of an arbitrary cell from outside. The image can be recognized.

Each cell forming the image is separated by a fine partition wall 21 to form a unit cell. However, when fabricating an actual plasma display panel, it is not easy to form a unit cell of about 100 μm on a glass substrate.

Recently, the screen printing method, the sand blasting method, the photosensitive paste method, etc. are used to form the fine partition wall 21. The sand blasting method has advantages in terms of precision and productivity. have.

FIG. 3 is a view for explaining a method of forming a partition by a sand blast method.

Referring to FIG. 3, in the sand blasting method, first, a glass paste, which is a material of the partition wall 21, is applied to the upper side of the rear substrate 20 and then dried, and the photosensitive film 24 is applied to the upper side of the glass paste. After the sanding process, the portion other than the photosensitive film 24 is removed.

When the photosensitive film 24 is removed and fired, the partition wall 21 is formed on the rear substrate 20.

FIG. 4 is a view showing the shape of the photosensitive film applied on the upper side of the glass paste, and FIG. 5 is a view for explaining the shape of the partition wall after sanding treatment and coating after the photosensitive film is applied.

FIG. 4 is a view of the photosensitive film 24 in FIG. 3, and FIG. 5 is a view of the partition wall 21 as viewed from the side of FIG. 3.

4 and 5, the photosensitive film 24 is applied on the upper side of the partition wall 21, the photosensitive film 24 in the shape of the photosensitive film 24 shown in FIG. Then, when the photosensitive film 24 is removed and the firing process is performed, a rise of 15 to 20 μm is generated at the end of the glass paste.

This is a phenomenon that occurs during the shrinking process of the glass paste during the firing process, and if the rising portion is not polished, crosstalk is generated, which significantly affects the image quality of the plasma display panel.

That is, in the plasma display panel, a desired color is expressed on the screen through plasma discharge in a desired cell. The cross-talk is not expressed due to the discharge effect of adjacent cells.

Therefore, the rising part is polished and removed. In this case, the polishing process and the dry cleaning process are added, thereby causing a problem in that the production time and the production cost of the product are additionally required.

An object of the present invention is to reduce the production time and production cost of a product by eliminating the rising phenomenon generated at the end of the partition wall when forming the partition wall of the plasma display panel.

1 is a view for explaining the structure of a conventional three-electrode alternating surface discharge plasma display panel.

2 is a view for explaining the operation of the conventional plasma display panel.

FIG. 3 is a view for explaining a method of forming a partition by a sand blast method.

4 is a view showing the shape of the photosensitive film applied on the upper side of the glass paste.

5 is a view for explaining the shape of a partition wall subjected to sanding and firing after coating of the photosensitive film;

6 is a view illustrating a photosensitive film formed on an upper side of a partition wall in the method for forming a partition wall of a plasma display panel according to the present invention.

7 is a view showing that the photosensitive film is coated on the material of the partition wall and sanded in the method for forming the partition wall of the plasma display panel according to the present invention.

8 is a view for explaining the shape of the partition formed after removing the photosensitive film and undergoing a calcination process.

<Explanation of symbols for main parts of drawing>

10; Front substrate 12; Dielectric layer

13; Protective layer 20; Backplane

21; Bulkhead 22; Dielectric layer

23; Fluorescent layer 24; Photosensitive film

B; Black layer X; Address electrode

Y; Scan sustain electrode Ya; Transparent electrode

Yb; Bus electrode Z; Common holding electrode

Za; Transparent electrode Zb; Bus electrode

The partition wall forming method of the plasma display panel according to the present invention comprises the steps of preparing and drying the glass paste on the upper side of the rear substrate, applying a photosensitive film having a narrow shape at the end on the upper side of the glass paste; Sanding and removing the photosensitive film, and firing the glass paste, characterized in that it comprises a.

In addition, the method for forming a partition wall of a plasma display panel according to the present invention is to provide a barrier material on an upper side of a rear substrate, apply a photosensitive film thereon, and then sanding and firing the partition wall forming method of the plasma display panel. The photosensitive film to be applied on the material upper side of the end portion is characterized in that the width is formed narrower than the central portion.

In addition, the partition wall forming method of the plasma display panel according to the present invention is a partition wall forming method of the plasma display panel by the sand blasting method, characterized in that the end portion of the photosensitive film formed on the material of the partition wall is sharply formed.

Hereinafter, a method of forming a partition wall of a plasma display panel according to the present invention will be described in detail with reference to the accompanying drawings.

6 is a view for explaining a photosensitive film formed on an upper side of the partition wall in the method for forming the partition wall of the plasma display panel according to the present invention.

In the formation of the partition wall of the plasma display panel, a material of the partition wall is coated on the upper side of the back substrate, and then dried, and then a photosensitive film is coated on the material of the partition wall.

Then, after the sanding process removes the portion that is not coated with the photosensitive film, the photosensitive film is removed and subjected to the firing process.

Glass paste may be used as the material of the partition wall, and various materials may be prepared.

The photosensitive film 24 illustrated in FIG. 6 is applied to a portion where the partition wall is to be formed, and unlike the photosensitive film illustrated in FIG. 4, the width of the end portion thereof is narrow.

More preferably, the end portion of the photosensitive film 24 is formed to have a narrow width from the portion where the rising phenomenon occurs, so that the end portion is sharply formed.

That is, the present invention proposes a method of eliminating the rise phenomenon of the end of the barrier rib, which has been a problem in the past, by changing the shape of the photosensitive film 24 used in the barrier rib formation process of the plasma display panel.

FIG. 7 is a view illustrating a photosensitive film 24 coated and sanded on a material of the partition wall in the method for forming a partition wall of the plasma display panel according to the present invention. FIG. It is a figure explaining the shape of the partition which was formed later.

Referring to FIGS. 7 and 8, when the photosensitive film 24 having the sharp end portion is coated and then sanded, the end portion of the partition wall 21 is processed to have a gentle slope.

That is, as compared with the partition 21 in FIG. 5, as the shape of the photosensitive film 24 is changed, it can be seen that the end portion of the partition 21 is formed with a gentle slope.

As described above, when the end portion of the partition wall 21 is formed to have a gentle inclination and the photosensitive film 24 is removed and subjected to the sintering process, as shown in FIG.

The present invention has the advantage of reducing the production time and production cost of the product by removing the rise phenomenon generated at the end of the partition wall when forming the partition wall of the plasma display panel.

Claims (3)

Preparing and drying the glass paste on the upper side of the rear substrate; Applying a photosensitive film having a width narrowing at an end portion to an upper side of the glass paste; Sanding and removing the photosensitive film; Calcining the glass paste, wherein the barrier rib forming method of the plasma display panel is performed. In the method of forming a partition wall of a plasma display panel in which a material of a partition is provided on an upper side of a rear substrate, a photosensitive film is applied thereon, and then sanded and fired. And a photosensitive film applied on the material upper side of the barrier rib, the end portion of which is narrower than the center portion. In the partition formation method of the plasma display panel by the sand blast method, The photosensitive film formed on the material side of the partition wall is a partition forming method of the plasma display panel, characterized in that the end is sharply formed.