KR20050102290A - Plasma display panel and the fabrication methode thereof - Google Patents

Abstract

A plasma display panel and a method of manufacturing the same are disclosed. The present invention forms the raw material for the X and Y electrodes on the front substrate, and irradiates a laser beam from the opposite surface of the front substrate on which the raw material for the X and Y electrodes is formed, thereby patterning the X and Y electrodes. Since it is a system irradiated from the lower part of a board | substrate, the phenomenon which the foreign material which generate | occur | produces at the time of laser processing remains on a board | substrate, or the phenomenon which a stain on a board | substrate can be prevented.

Description

Plasma display panel and manufacturing method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved structure and method thereof to form X and Y electrodes by laser processing, and a method of manufacturing the same.

Typically, a plasma display panel is a display device that discharges a sealed discharge gas between opposing substrates on which electrodes are formed, and excites the phosphor layer by ultraviolet rays generated thereby to implement desired numerals, letters, or graphics.

The plasma display panel may be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and may be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

The DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between corresponding electrodes. On the other hand, in the AC plasma display panel, at least one electrode is embedded in the dielectric layer, and instead of direct charge transfer between the corresponding electrodes, the ions and electrons generated by the discharge adhere to the surface of the dielectric layer to form a wall. A wall voltage is formed and discharge can be maintained by a sustaining voltage.

In the opposite discharge type plasma display panel, an address electrode and a Y electrode are provided to face each unit pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge type plasma display panel, an address electrode and corresponding X and Y electrodes are provided for each unit pixel to generate addressing discharge and sustain discharge.

The conventional plasma display panel includes a front substrate, a rear substrate disposed to face the substrate, an X and Y electrode disposed on a lower surface of the front substrate, a bus electrode electrically connected to the X and Y electrodes, and an X and Y electrode. A front dielectric layer embedding the bus electrode, a protective film layer coated on the surface of the front dielectric layer, an address electrode coated on the top surface of the back substrate, a back dielectric layer embedding the address electrode, and partition walls provided between the front and back substrates; It includes a red, green, and blue phosphor layer coated in the discharge space inside the partition wall.

At this time, the X and Y electrodes are made of a transparent conductive film such as an ITO film (Indium Tin Oxide Film), a typical manufacturing process is to laminate a photosensitive film on a substrate coated with the raw material for the ITO film, using a photo mask It is exposed, developed using a developing solution, etched using an etching solution, and peeled and patterned through a peeling solution.

Recently, laser processing is performed to solve the problem of undercut due to etching. That is, the raw material for ITO film is coated on a board | substrate, and a X and Y electrode are patterned by irradiating a laser beam from the upper part.

By the way, in the method of irradiating the laser beam from the upper portion of the substrate, a stained portion occurs in the processed portion due to the non-uniformity of the laser beam. In addition, the desired pattern is difficult to be formed due to the fragmentation of the raw material for the ITO film due to the laser beam processing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a plasma display panel and a method of manufacturing the same, wherein the manufacturing process is simplified by forming X and Y electrodes using a laser beam.

In order to achieve the above object, the manufacturing method of the plasma display panel according to an aspect of the present invention,

Forming raw materials for X and Y electrodes on the front substrate; And

And patterning the X and Y electrodes by irradiating a laser beam from opposite surfaces of the front substrate on which the X and Y electrode raw materials are formed.

In addition, the X and Y electrode raw material is characterized in that the entire surface is coated on the surface of the front substrate.

In addition, the raw material for the X and Y electrodes is characterized by consisting of an ITO film.

Furthermore, in the step of irradiating a laser beam,

The laser beam is irradiated to the raw material for the X and Y electrodes through the front substrate to remove the raw material for the X and Y electrodes other than the portion where the X and Y electrodes are patterned.

In addition, the laser beam is characterized in that irradiated with a wavelength of 1064 nanometers.

Furthermore, the method may further include patterning a bus electrode electrically connected to the X and Y electrodes.

The method may further include forming a front dielectric layer filling the X and Y electrodes and the bus electrode.

Plasma display panel according to another aspect of the present invention,

By forming a raw material for the X and Y electrodes on one surface of the front substrate, and irradiating a laser beam from the front substrate opposite to the front substrate, wherein the laser beam passes through the front substrate to pattern the X and Y electrodes. It is done.

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

 1 illustrates a partial cutting of the plasma display panel 100 according to an exemplary embodiment of the present invention.

Referring to the drawings, the plasma display panel 100 includes a front substrate 110 and a back substrate 120.

The front substrate 110 is made of soda lime glass. A plurality of X and Y electrodes 131 and 132 are arranged on the front substrate 110 on a surface of the front substrate 110 that faces the rear substrate 120. The X and Y electrodes 131 and 132 extend in the x direction and are spaced apart from each other in the y direction. The X electrode 131 is used as a scan electrode when addressing is performed. The bus electrode 133 is electrically connected to the X and Y electrodes 131.

On the surface of the front substrate 110 where the sustain electrodes 130 including the plurality of X and Y electrodes 131 and 132 and the bus electrode 133 are arranged, a front dielectric layer made of a lead oxide combination ( 140 is formed. The plurality of sustain electrodes 130 are embedded in the front dielectric layer 140. A passivation layer 150 formed of magnesium oxide is formed on the front surface of the front dielectric layer 140.

A plurality of address electrodes 160 are arranged on the rear substrate 120 facing the front substrate 110 to be spaced apart by a predetermined interval in the x direction. The address electrode 160 forms a grid pattern with the plurality of sustain electrodes 130 on the front substrate 110.

The back dielectric layer 170 is formed on the surface of the back substrate 120 substantially of the same material as the front dielectric layer 140. The back dielectric layer 170 fills the address electrode 160.

A partition wall 180 having a uniform width and height is formed on the surface of the rear dielectric layer 170 along the x and y directions. The partition wall 180 includes a horizontal partition wall 181 disposed in a direction orthogonal to the address electrode 160, and a vertical partition wall 182 disposed in a direction parallel to the address electrode 160. The horizontal partition wall 181 and the vertical partition wall 182 are combined with each other to form a grid.

Red, green, and blue phosphor layers 190 are alternately formed on the sidewalls of the barrier 180 and the surface of the rear dielectric layer 170.

The front substrate 110 and the rear substrate 120 are coupled to each other using a sealing glass. At this time, a discharge gas including an inert gas is injected into the discharge space partitioned by the partition wall 180. The region in the discharge space where the pair of sustain electrodes 130 and the address electrodes 160 arranged in the direction crossing the same is a discharge cell for displaying an image. The discharge cells are arranged in rows in the x direction and the y direction. As a result of this, the plasma display panel 100 can form a matrix display by switching individual discharge cells.

2 illustrates a pattern of the sustain electrode 130 and the address electrode 160 of FIG. 1.

Here, the partition wall 180 is not shown.

Referring to the drawings, the sustain electrode 130 includes X and Y electrodes 131 and 132 made of a transparent electrode and a bus electrode 133 made of a metal material.

The bus electrode 133 is formed at the outermost part of each of the X and Y electrodes 131 and 132. The X and Y electrodes 131 and 132 have protrusions 131 and 132, respectively. The protrusions 131 and 132 are formed to face each other at a gap g between the pair of storage electrodes 130. The protrusions 131 and 132 are formed in the above pattern in order to limit the surface discharge start voltage and to obtain a sufficient surface discharge.

A process for manufacturing the front substrate 110 of the plasma display panel 100 having the above structure will be described in detail with reference to FIGS. 3A to 3D.

First, as shown in FIG. 3A, the raw material 134 for the X and Y electrodes is formed by coating on the entire surface of the front substrate 110 made of soda lime glass. The X and Y electrode raw material 134 is made of a transparent conductive film, for example, an indium tin oxide (ITO) film. The X and Y electrode raw material 134 is formed by chemical vapor deposition (CVD).

Next, as shown in FIG. 3B, the raw material 134 for the X and Y electrodes is patterned into transparent X and Y electrodes 131 and 132. This process is accomplished by laser processing with a laser device. That is, the raw material for X and Y electrodes 134 made of a transparent conductive film such as an ITO film is patterned by a laser device such as a YAG laser (Yttrium-Aluminum-Garnet Laser).

The laser beam irradiated from the laser device is not irradiated from the upper portion of the front substrate 110 on which the raw materials 134 for the X and Y electrodes are formed, and the front substrate on which the raw materials 134 for the X and Y electrodes are formed ( It is irradiated from the bottom of the front substrate 110, which is the opposite side of the 110.

Accordingly, the laser beam penetrates the front substrate 110 and irradiates the raw material 134 for the X and Y electrodes, and for the X and Y electrodes other than the portion where the X electrode 131 and the Y electrode 132 are formed. The raw material 134 is removed. As a result, the X and Y electrodes 131 and 132 having a desired pattern are formed.

In this case, the laser beam irradiated from the laser device preferably has a wavelength that is not absorbed by the front substrate 110 made of soda lime glass when passing through the front substrate 110, for example, a wavelength of 1064 nanometers.

In addition, it will be advantageous to additionally install a suction device or a blower device that can suck the vaporized X and Y electrode raw material 134 so that it can be discharged well during laser processing.

After such laser ablation is performed, the raw material 135 for the bus electrode 135 on the X and Y electrodes 131 and 132 to form the bus electrode 133 as shown in FIG. 3C. ) Is formed. The bus electrode raw material 135 may be coated on the front substrate 110. The bus electrode raw material 135 is made of silver (Ag) paste or a metal material having excellent conductivity such as chromium-copper-chromium (Cr-Cu-Cr).

The bus electrode raw material 135 forms the bus electrode 133 by a photolithography process. That is, the photosensitive electrode paste is printed on the front substrate 110, dried at a predetermined temperature, exposed using a photo mask, developed using a developer, and baked at a predetermined temperature.

The bus electrode 133 is formed along the outermost edges of the X and Y electrodes 131 and 132, as shown in FIG. 3D, and is electrically connected to the X and Y electrodes 131 and 132.

In a subsequent process, the front dielectric layer 140 is formed on the front substrate 110 to bury the X and Y electrodes 131 and 132 and the bus electrode 133. The protective layer 150 of magnesium oxide is coated on the surface sequentially.

As described above, the plasma display panel of the present invention and a method of manufacturing the same are patterned by irradiating a laser beam from the lower part of the substrate to pattern X and Y electrodes made of a transparent conductive film, and using a mask having a desired shape for the laser beam. The shape is continuously moved by stepping. Thereby, the phenomenon which the foreign material which generate | occur | produces at the time of laser processing remains on a board | substrate, or the phenomenon which a stain on a board | substrate can be prevented.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is an exploded perspective view illustrating a part of a plasma display panel according to an embodiment of the present invention;

2 is a plan view showing the electrode arrangement of FIG.

3A to 3D sequentially illustrate a process for forming an ITO film according to an embodiment of the present invention.

3A is a cross-sectional view showing a state after the raw material for ITO film is applied on a substrate;

3B is a cross-sectional view showing a state after laser processing on the substrate of FIG. 3A;

3C is a cross-sectional view showing a state after the raw material for a bus electrode is applied on the substrate of FIG. 3C;

3D is a sectional view showing a state after patterning a bus electrode on the substrate of FIG. 3C.

<Brief description of symbols for the main parts of the drawings>

100 ... plasma display panel

110 ... front substrate 120 ... back substrate

130 ... hold electrode 131 ... X electrode

132 ... Y electrode 133 ... bus electrode

140.Front dielectric layer 150.Protective layer

160 ... address electrode 170 ... backside dielectric layer

180 ... bulk 190 ... phosphor layer

Claims (9)

Forming raw materials for X and Y electrodes on the front substrate; And And patterning the X and Y electrodes by irradiating a laser beam from an opposite surface of the front substrate on which the raw materials for the X and Y electrodes have been formed. The method of claim 1, And the raw material for the X and Y electrodes is coated on the entire surface of the front substrate. The method of claim 1, And the raw material for the X and Y electrodes is made of an ITO film. The method of claim 1, And the front substrate is made of soda lime glass. The method of claim 1, In the step of irradiating a laser beam, The laser beam is irradiated to the raw material for the X and Y electrodes through the front substrate to remove the raw material for the X and Y electrodes other than the portion where the X and Y electrodes are patterned. Way. The method of claim 5, And the laser beam is irradiated at a wavelength of 1064 nanometers. The method of claim 1, Patterning a bus electrode electrically connected to the X and Y electrodes. The method of claim 7, wherein And forming a front dielectric layer filling the X and Y electrodes and a bus electrode. By forming a raw material for the X and Y electrodes on one surface of the front substrate, and irradiating a laser beam from the front substrate opposite to the front substrate, wherein the laser beam passes through the front substrate to pattern the X and Y electrodes. Plasma display panel.