KR100274461B1 - Manufacturing method of electrode of plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device, which is a type of light emitting device that displays an image by using gas discharge between glass substrates generated by discharge between electrodes. The purpose is to prevent them.

In order to realize this, the present invention provides a method for forming an electrode forming material on a substrate glass; Firing and drying the substrate; Forming an entire photoreactive material of a thin film on the electrode forming material; Exposing the photoreactive material in a predetermined pattern; Developing the photoreactive material after the exposure; Forming a pattern of an electrode forming material using the abrasive after the development; And removing the remaining photoreactive material and drying it.

Since the firing step is performed before the pattern forming step of the electrode, there is an advantage in that electrode formation of a uniform line width and pattern is possible.

Description

Electrode Formation Method of Plasma Display

The present invention relates to a plasma display panel (hereinafter referred to as "PDP"), which is a type of light emitting device that displays an image by using gas discharge between glass substrates. Accordingly, the present invention relates to a method of forming an electrode that generates an image by causing gas discharge between a plurality of electrodes in a panel.

In general, a PDP is a light emitting device that displays an image by using an internal gas discharge phenomenon, and there is no need to mount an active device for each cell, so the manufacturing process is simple, the screen is easy to be enlarged, and the response speed is high. The direct view type image display device having a large screen is fast, and especially, the image display device for the HDTV (High Definition TeleVision) era is used for TV, monitor, display device for indoor and outdoor advertisement.

In addition, the PDP is in the spotlight in a large (40 to 60 inch) display element region, in which two glass substrates are sealed by fritted glass, and in the sealed structure, gas is 100 to 600 Torr. It is filled with pressure, and the main gas currently used is helium (He), which includes xenon (Xe).

In the image display section of the panel, the intersections of the plurality of electrodes correspond to each pixel (cell). During driving, a voltage of 100 volts or more is applied between the intersecting electrodes, and the gas is glow discharged to display an image using light emission at that time. Done. The panel unit configured as described above is combined with the driving unit to serve as one display element.

Such PDPs are classified into two-electrode type, three-electrode type, and four-electrode type according to the number of electrodes assigned to each cell. Among them, the two-electrode type has two electrodes for addressing and sustaining. The three-electrode type is generally called a surface discharge type, and is switched or maintained by a voltage applied to an electrode located on the side of the discharge cell. The apparatus shown in FIGS. An example of a three-electrode surface discharge PDP according to the technique will be described.

1 shows a top and bottom plate separation structure of the PDP. Looking at the configuration, the top structure includes a front substrate 1, a pair of two sustain electrodes 3 formed on the front substrate 1, and a sustain structure. A dielectric layer 4 for maintaining surface charges generated at the time of discharge of the electrode 3, and a protective layer 5 for protecting the dielectric layer 4 from discharge; The address electrode 6 formed on the back substrate 2 and the partition wall 7 formed in parallel between the address electrode 6 and the partition wall 7 are applied between the partition wall 7 and visible light is generated by excitation of ultraviolet rays. It consists of the phosphor 8 which generate | occur | produces.

2 is a cross-sectional view of a predetermined cell after the upper and lower substrates of FIG. 1 are combined, and the upper structure is rotated by 90 ° for clarity.

In the manufacturing process of the PDP having the above-described configuration, a method for forming the sustain electrode 3, the address electrode 6, and the like is a pattern forming method by screen printing, a pattern forming method by photosensitive paste, and vacuum deposition. The sputtering method using this is mainly used.

The process of forming the conventional address electrode 6 using the pattern forming method using the photosensitive paste is described below with reference to FIG. 3.

First, an electrode forming material 6 ′ of photosensitive material is coated on the front surface of the back substrate 2, and then an exposure pattern is formed by exposing the photomask 10 on which the electrode pattern is formed. When the developing process is performed after the exposure, only the electrode forming material 6 of the portion to which light is irradiated remains. And when firing, the remaining electrode forming material is cured and has resistance, thereby completing the electrode pattern.

However, in the above-described electrode forming process according to the prior art, the printing method using the electrode forming material in the paste state is uniformity is determined according to the cleaning state of the back substrate 2 and the precision of the screen mask, the substrate glass cleaning If the condition is not good, non-uniformity of the electrode 6 pattern occurs as shown in FIG. 4 during the final firing process of the patterned electrode.

As described above, when the electrode does not achieve a uniform line width, disconnection occurs in a portion of the electrode line during the manufacturing process or by external impact, etc., which makes the conduction of the discharge current difficult, thereby lowering the discharge uniformity.

In addition, if the line width of the electrode is non-uniform, the line resistance of the electrode becomes non-uniform, resulting in a problem that the voltage margin due to the resistance difference when the panel is driven becomes worse.

The present invention is invented to solve the problems of the prior art as described above, it is possible to form an electrode having a uniform line width, it is advantageous in high definition and can prevent the occurrence of disconnection of the electrode, uniformity of line resistance of the electrode An object of the present invention is to provide a method for forming an electrode that can improve the efficiency of the electrode.

1 is an exploded perspective view of an upper and a lower substrate of a typical plasma display panel.

2 is a cross-sectional view of the cell after bonding of the substrate of FIG. 1.

3 is an electrode forming process according to the prior art.

4 is an electrode line pattern diagram according to the prior art.

5 is an electrode line pattern diagram according to the present invention.

6 is an electrode forming process chart according to the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100: DFR tape 102: back substrate

106: address electrode 106 ': electrode forming material

110: photomask

Technical means of the present invention for realizing the above object is a step of forming an electrode forming material on the substrate glass; Firing and drying the substrate; Forming an entire photoreactive material on the electrode forming material; Exposing the photoreactive material in a predetermined pattern; Developing the photoreactive material after the exposure; Forming a pattern of an electrode forming material using the abrasive after the development; And removing and drying the residual photoreactive material to form an electrode for the PDP.

Preferably, the photoreactive material is exposed by a patterned photomask, and the photoreactive material is characterized in that the solid state of the thin film.

In the electrode forming process of the present invention proceeds as described above, by forming a pattern of the electrode using a photoreactive material, it is possible to form a line width of a uniform electrode (holding electrode, address electrode, etc.) The uniformity of the line width can be maintained, it can be seen that it is possible to prevent the short circuit of the electrode due to external impact during the manufacturing process or movement of the product.

As a result, there is an advantage that the discharge uniformity of the PDP can be improved by improving the conduction rate of the discharge current along the electrode line.

And, there may be a plurality of embodiments of the present invention, hereinafter will be described in detail with respect to the most preferred embodiment.

This preferred embodiment allows for a better understanding of the objects, features and effects of the present invention.

Hereinafter, preferred embodiments of the electrode forming method according to the present invention with reference to the accompanying drawings will be described in detail.

In addition, in the drawing used for description, the overlapping description may be abbreviate | omitted about the component similar to the prior art.

5 shows an electrode state in which the line width is uniformly formed according to the present invention, and FIG. 6 shows an electrode forming process according to the embodiment.

In the present embodiment, the process of forming the address electrode will be described. As the above photoreactive material, a DFR (Dry Film Resist) material is used.

First, the electrode forming material 106 ′ is completely coated on the back substrate 102 (step: ST1), fired at 450 ° C., and dried. In this case, the electrode forming material 106 ′ applied may be a general electrode paste or a photosensitive material.

After cleaning the surface of the electrode forming material 106 'to remove oxide from the surface of the electrode and attaching the DFR tape 100 cured by light irradiation on the front surface (step: ST2), a predetermined pattern is formed. The photomask 110 formed is exposed to light through light irradiation. (Step: ST3)

After the exposure is completed, if the developing process is performed using a developer, a portion of the DFR tape 100 irradiated with light remains cured, and a portion of the DFR tape 100 covered by the pattern of the remaining photomask 110 is washed away with the developer. (Step: ST4)

When the sand blast process using the sand of the fine particles is performed while the pattern is formed by the remaining DFR tape 100, the pattern of the electrode forming material 106 ′ is formed along the pattern of the DFR tape 100. (Process: ST5)

Finally, the remaining DFR tape 100 is removed and dried to complete the address electrode 106 having a uniform line width. (Step: ST6)

In the above process, it is advantageous to attach the thin film DFR tape 100 to form the pattern of the electrode to form the pattern of the desired line pitch.

On the other hand, as a comparative example, that is, in the conventional electrode forming process, the non-uniformity of the electrode line width occurred during the firing process after forming the electrode pattern, the present invention first performs the firing process and then the electrode pattern by the abrasive It can be seen that by forming a uniform electrode can be formed.

As a result, according to the present invention, it is possible to form an electrode pattern excellent in uniformity, which is advantageous to a high-definition electrode structure, and it is possible to prevent short circuiting of the electrode, thereby preventing mis-discharge due to poor conduction of discharge current. You can do it.

In addition, while specific embodiments of the present invention have been described and illustrated above, it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be individually understood from the technical spirit or the prospect of the present invention, and such modified embodiments should fall within the appended claims of the present invention.

As described above, the electrode forming method of the present invention can maintain the line width of the electrode having excellent uniformity, which is advantageous in high definition and has the effect of forming an electrode pattern having a low occurrence rate of short circuit of the electrode.

Claims (3)

Forming an electrode forming material on the substrate glass; Firing and drying the substrate; Forming an entire photoreactive material on the electrode forming material; Exposing the photoreactive material in a predetermined pattern; Developing the photoreactive material after the exposure; Forming a pattern of an electrode forming material by using an abrasive after the development; and Removing the remaining photoreactive material and drying the electrode to form an electrode; The method of claim 1, And exposing the photoreactive material in a predetermined pattern to expose the patterned photomask. The method of claim 1, And the photoreactive material formed on the electrode forming material is in a solid state.