KR100464308B1 - Method of manufacturing partition wall of plasma display device - Google Patents

Abstract

Disclosed is a method of manufacturing a partition of a plasma display device. The barrier rib is formed by forming a barrier rib layer having a predetermined height by repeating a printing and drying process with a paste-like barrier rib material on a substrate along a predetermined barrier rib pattern and reducing the width of the barrier rib layer. Irradiating a laser beam to remove a portion of the off-edge part. According to such a partition wall manufacturing method, since impurities are hardly left in the process of manufacturing a partition wall having a fine width, stable discharge can be achieved without a vibration phenomenon, and there is an advantage of not causing an increase in the discharge voltage.

Description

Method of manufacturing partition wall of plasma display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a barrier rib manufacturing method of a plasma display device, and more particularly, to a barrier rib manufacturing method of a plasma display device for making a barrier rib with a fine line width.

BACKGROUND ART In general, a plasma display device is used to display an image using a gas discharge phenomenon, and is excellent in various display capacities such as display capacity, brightness, contrast, afterimage, viewing angle, etc., and has been spotlighted as a device that can replace CRT. . In the plasma display device, a discharge is generated in a gas between the electrodes by a direct current or an alternating voltage applied to the electrode, and the phosphor is excited by the radiation of ultraviolet rays accompanying the gas discharge process to emit light.

The plasma display device can be divided into an alternating current type (AC type) and a direct current type (DC type) by a discharge mechanism. In the DC type, each electrode constituting the plasma display panel is directly exposed to the gas layer enclosed in the discharge cell, and the voltage applied thereto is applied to the discharge gas layer as it is. In the AC type, the electrodes are separated by the discharge gas layer and the dielectric layer to form the wall charges without absorbing the charged particles generated during the discharge phenomenon, and the next discharge is generated by using such wall charges.

FIG. 1 is a schematic exploded perspective view of a structure of a general AC plasma display device.

Referring to the drawings, stripe-shaped first electrodes 13a and second electrodes 13b are formed on opposing surfaces of the upper and lower glass substrates 11 and 12 facing each other. The dielectric layer 14 and the protective layer 15 are sequentially stacked on the inner surface of the upper glass substrate 11. The lower glass substrate 12 has a partition 17 formed on an upper surface of the dielectric layer 16. The space between the adjacent partition walls 17 becomes the cell 19, and the cell 19 is filled with an inert gas such as argon. In addition, the phosphor 18 is formed on the bottom surface of each cell 19, that is, the region between the partition walls 17.

Referring to the operation of the plasma display device having the above configuration, the phosphor 18 having ultraviolet rays generated by gas discharge due to the voltage applied between the electrodes 13a and 13b is applied to the inner surface of the discharge cell 19. ) And visible light is emitted from the phosphor 18 by the principle of photoluminescence. At this time, the color display is displayed by the red, green, and blue phosphors 18 formed in each display cell 19.

On the other hand, the partition wall of the plasma display which operates in this way was conventionally manufactured by the repeat printing method.

In other words, the printing and drying process is repeated several times according to the barrier rib pattern to form the barrier rib material on the dielectric layer 16 of the lower substrate 12 on which the electrode 13b and the dielectric layer 16 are formed. It was. Then it is fired. The partition wall 17 formed by such a repetitive printing technique has a bell shape in which the upper part is narrow and the lower part is wide depending on the height. According to the conventional barrier rib manufacturing method, there are few impurities remaining after the firing process so that the discharge voltage does not increase, the vibration phenomenon during discharge is low, and the uniformity of the screen is provided. However, there is a limit to narrowing the width of the partition wall 17, which makes it difficult to manufacture a plasma display device capable of realizing high quality images by increasing the number of pixels per unit area.

In order to solve this problem, a method of manufacturing a partition having a desired line width by an etching process by sandblasting has been proposed. This method first forms a barrier material layer on a substrate by the required barrier height. Next, a mask layer is removed on the barrier material layer except for the barrier rib forming portion by the photolithography method. Then, by forming sand particles on the portion where the mask layer is formed, the barrier rib material layer is completed by removing the barrier material layer which is not protected by the mask layer. However, in the method of manufacturing a partition wall, there is a large loss of partition material, organic matter that is weakly attached to the etched portion acts as an impurity to increase the gas discharge voltage, and sand particles attached to the wall surface of the etched partition wall discharge during gas discharge. There is a problem that causes tremor, and it has not been put to practical use yet.

The present invention has been made to solve the above problems, and provides a method for manufacturing partition walls of a plasma display device, in which generation of impurities that lower gas discharge efficiency can be suppressed in a process of manufacturing partition walls having a fine line width. There is a purpose.

In order to achieve the above object, a barrier rib manufacturing method of a plasma display apparatus according to the present invention includes forming a barrier rib layer having a predetermined height by repeatedly printing and drying the barrier rib material in a paste state along a predetermined barrier rib pattern on a substrate. Wow; Irradiating a laser beam to remove a portion of the edge portion of the barrier rib layer, which is outside the set line width, to reduce the width of the barrier rib layer.

The substrate is provided with stripe electrodes formed before the forming of the barrier layer, and a dielectric layer, and in a step of removing a portion of the barrier layer, a pulse image is formed at a portion of the edge of the barrier layer outside the set line width. After irradiating the laser beam with a portion, and removing a portion of the barrier layer, it is preferable to further include blowing blown particles with compressed air by the laser beam. In addition, the partition material is used to maintain the black after the firing process.

Hereinafter, a method of manufacturing a partition wall of a plasma display device according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

A process flow diagram of the method for manufacturing a partition wall of the plasma display apparatus according to the present invention shown in FIG. 2 will be described below with reference to the cross-sectional views after the process for each manufacturing step shown in FIGS. 3A to 3D.

First, as a preparation step, a plurality of line electrodes 23 spaced a predetermined distance from the glass substrate 21 is formed, and a dielectric layer 26 is formed over the entire surface with a predetermined thickness thereon (step 100; see FIG. 3A). .

Repeating the process of silk printing and drying the partition paste on the dielectric layer 26 of the glass substrate 21 formed through the step 100 to a predetermined thickness along a predetermined partition pattern several times, as shown in FIG. (27) is formed (step 110). In this case, the partition paste used is a black material after the firing step, which is a subsequent step.

Next, the partition layer 27 is baked at a predetermined temperature (step 120).

In step 130, as shown in FIG. 3C, the laser beam 30 radiated in a pulse form to remove a portion outside the set line width d of the barrier layer 27 cured by firing is removed. Check). The portion 27a irradiated with the pulsed laser beam 30 is separated by the instantaneous thermal expansion. As described above, the partition layer 27 having a black color in the etching process has an excellent absorption rate of the laser beam 30, so that the etching target portion 27a can be more effectively removed. On the other hand, the dielectric layer 26 formed of a white or transparent material having a high reflectance has low absorption rate for the laser beam 30 and is not easily damaged.

In this manner, when the edge of the target portion 27a is scanned with the laser beam 30 along the partition pattern formed over the entire area, as shown in FIG. 3D, the partition 27 having the desired line width d is obtained. Is made.

Then, as a finishing step, the particles are separated from the partition 27 which has been etched, but blown with compressed air to the partition 27 to effectively remove particles that may remain or become weakly attached thereon to remove the remaining particles. (Step 140).

As described so far, according to the method for manufacturing a partition wall of the plasma display apparatus according to the present invention, a partition wall having a fine width can be manufactured, and since impurities are hardly left in the partition wall manufacturing process, stable discharge is achieved without vibration. And advantages that do not cause an increase in the discharge voltage.

1 is a schematic exploded perspective view of a typical AC plasma display device,

2 is a process flow diagram of a barrier rib manufacturing method of a plasma display device according to the present invention;

3A to 3D are cross-sectional views after a process of fabricating a partition wall of a plasma display apparatus according to the present invention.

<Description of Symbols for Major Parts of Drawings>

11: lower substrate 12: upper substrate

13a: first electrode 13b: second electrode

14, 16, 26: dielectric layer 15: protective layer

17: partition 18: phosphor

21 substrate 23 electrode

27: partition wall

Claims (6)

(A) forming a barrier rib layer having a predetermined height on the substrate by repeating the printing and drying process several times with a barrier rib material in a paste state along a predetermined barrier rib pattern; And (b) irradiating a laser beam to remove a portion of the edge of the barrier rib layer, which is outside the set line width, in order to reduce the width of the barrier rib layer. The method of claim 1, The substrate is provided with a stripe electrode and a dielectric layer formed before the forming of the barrier layer, and the barrier layer is formed on the dielectric layer. The method of claim 1, In the forming of the barrier rib layer, the barrier rib of the plasma display apparatus is formed by forming a barrier rib layer having a predetermined height and then firing at a predetermined temperature while repeatedly printing and drying the barrier rib material in a paste state. Manufacturing method. The method of claim 1, And removing a portion of the barrier layer, irradiating a laser beam in a pulse shape to a portion of an edge of the barrier layer outside the set line width. The method of claim 1, And removing a portion of the barrier layer by blowing blown out particles with compressed air by using a laser beam. The method of claim 1, The barrier material is a barrier rib manufacturing method of the plasma display device, it characterized in that it is used to maintain the black after the firing process.