KR20060073319A - Method for making electrode of plasma display panel - Google Patents

Abstract

The present invention relates to a method of forming an electrode of a plasma display panel to prevent the occurrence of edge phenomenon by forming an electrode by curing by heat using a heat generating mold on the glass substrate of the plasma display panel. The present invention provides a plasma display panel including a front substrate provided with a plurality of sustain electrode pairs including a transparent electrode and a bus electrode on a glass substrate, and a rear substrate provided with a plurality of address electrodes formed to face the sustain electrode pair. A method of forming an electrode, the method comprising: forming a photosensitive metal paste layer on the glass substrate; Thermosetting a predetermined pattern from an upper portion of the photosensitive metal paste layer; Developing the glass substrate thermoset; After the developing step, drying and baking the thermosetting photosensitive metal paste on the glass substrate to form an electrode. The photosensitive metal paste includes at least one of copper (Cu) and silver (Ag), and the thermosetting of the photosensitive metal paste layer; It is preferable to heat-set the heating mold provided with the heating wire of a predetermined pattern to the upper part of the said photosensitive metal paste layer.

Plasma, Panel, Glass, Electrode, Mold, Hot Wire, Thermoset, Pattern, Edge

Description

Electrode Formation Method of Plasma Display Panel {Method for Making Electrode of Plasma Display Panel}

1 is a perspective view schematically showing a panel structure of a conventional PDP.

2 is a process diagram sequentially illustrating a method of forming an electrode of a conventional PDP.

3 is a block diagram sequentially illustrating a method for manufacturing a panel of a PDP according to the present invention.

4 is a process chart sequentially showing a method of forming an electrode of the PDP according to the present invention.

5 is a view showing a heating mold provided with a heating wire of a predetermined pattern according to the present invention.

<Description of Symbols for Main Parts of Drawings>

10, 20: glass substrate 11, 12: electrode

13: dielectric layer A: photosensitive metal paste layer

B: pattern mask 30: heat generating mold

31: heating wire

The present invention relates to a method of forming an electrode of a plasma display panel, and more particularly, to a method of forming an electrode of a plasma display panel in which a metal electrode is formed on a glass substrate of a plasma display panel.

In general, a plasma display panel is a partition wall formed between a front substrate and a rear substrate to form a unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As illustrated, the plasma display panel includes a front substrate 100 in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on the front glass 101, which is a display surface on which an image is displayed. And a rear substrate 110 having a plurality of address electrodes 113 arranged so as to intersect with the plurality of sustain electrode pairs formed on the rear glass 111 forming the rear surface in parallel with a predetermined distance therebetween.

The front substrate 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs.

Scan electrode 102 and sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit discharge current and insulate between electrode pairs, and to facilitate discharge conditions on top of upper dielectric layer 104. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112.

On the upper side of the rear substrate 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

Here, the above-described partition 112, the upper surface of the front glass 101 absorbs the external light generated from the outside to reduce reflection and improve the color purity (purity) and contrast of the front glass 101, etc. The black layer 116 functioning as an array is configured.

As described above, the plasma display panel having the structure uses micro discharges to generate visible light in the cells where the discharges are generated, and the barrier ribs 112 are used to spatially separate neighboring cells. The black layer 116 is formed in order to partition the cell from the cell, and the black layer 116 is formed to prevent unnecessary light from being emitted from the upper part of the barrier rib during discharge, thereby reducing the contrast characteristics of the plasma display panel.

The conventional PDP having such a structure is largely formed through a glass substrate manufacturing process, a front substrate manufacturing process, a rear substrate manufacturing fixing and an assembling process. Looking at the electrode forming method as an example of the front substrate manufacturing process of the conventional PDP is as follows.

2 is a process diagram sequentially illustrating a method of forming an electrode of a conventional PDP.

As shown, in step S101, a photosensitive metal paste layer A is formed of a metal having a predetermined thickness on the front glass substrate 10, which is a display surface on which an image is to be displayed, through a β printing method.

Here, the photosensitive metal paste layer (A) preferably includes a silver (Ag) paste to which a photosensitive resin is added, and the photosensitive resin uses a photosensitive material sensitive to light such as ultraviolet rays.

Then, in step S102, the silver (Ag) paste layer (A) to which the photosensitive resin is added is dried for a predetermined time.

In step S103, the pattern mask B having a predetermined pattern is formed at a predetermined distance above the photosensitive metal paste layer A, and the photosensitive metal paste layer A of the opened portion is irradiated with light from the upper side. Cures by light. This process is called an exposure process.

The glass substrate 10 that has undergone the exposure process is developed in step S104. When the exposed glass substrate 10 is developed, the portion exposed to the light due to the pattern mask B is hardened, and the portion not exposed to the light is removed by sand blasting or etching.

Thereafter, in step S105, the photosensitive metal paste layer A of the remaining part after the developing process (that is, the part exposed in the exposure process) is dried for a predetermined time.

Subsequently, in step S106, the dried photosensitive metal paste layer A is subjected to a firing process at a temperature of about 500 to 600 ° C., thereby forming metal electrodes 11 and 12 having a predetermined pattern.

Thereafter, as shown in FIG. 1, dielectric layers 13a and 13b are formed, and a protective layer 14 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 13 to finally form a PDP panel. do.

However, the electrode forming method of the conventional plasma display panel, as described above, by forming a electrode by a photo lithography method using a silver (Ag) paste and film, or the superposition of Al or Cr-Cu-Cr Although an etching method using deposition is used, there is a problem in that an undercut occurs during development due to surface exposure, resulting in edge phenomenon in which both ends of the pattern are lifted after firing.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, to prevent the occurrence of edge phenomenon by forming an electrode by curing by heat using a heating mold on the glass substrate of the plasma display panel. It is an object to provide a method for forming an electrode of a plasma display panel.

According to an aspect of the present invention, there is provided a method of forming an electrode of a plasma display panel, the front substrate having a plurality of sustain electrode pairs including a transparent electrode and a bus electrode disposed on an upper portion of a glass substrate, and crossing the sustain electrode pair. A method of forming an electrode of a plasma display panel, comprising: forming a photosensitive metal paste layer on an upper portion of the glass substrate; Thermosetting a predetermined pattern from an upper portion of the photosensitive metal paste layer; And developing the glass substrate thermoset in the above.

The method may further include drying and baking the thermosetting photosensitive metal paste on the glass substrate to form an electrode after the developing step.

The photosensitive metal paste includes at least one of copper (Cu) and silver (Ag), and the thermosetting of the photosensitive metal paste layer; It is preferable to heat-set the heating mold provided with the heating wire of a predetermined pattern to the upper part of the said photosensitive metal paste layer.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

3 is a flowchart sequentially illustrating a method of manufacturing a plasma display panel according to the present invention.

As shown, the manufacturing method of the plasma display panel according to the present invention, the front substrate manufacturing process (S101 ~ S204), the back substrate manufacturing process (S205 ~ S209) and the bonding process for bonding the above-mentioned front substrate and the rear substrate (S210 to S211).                     

First, referring to the above-described manufacturing process of the front substrate, after preparing the front glass to be the base of the front substrate (S201), a plurality of sustain electrode pairs are formed on the front glass (S202).

Thereafter, an upper dielectric layer is formed over the sustain electrode pair (S203), and a protective layer of MgO material for protecting the sustain electrode pair is formed over the upper dielectric layer (S204).

In addition, looking at the manufacturing process of the rear substrate, the rear substrate is prepared in the same manner as the front substrate, the rear glass (S205), and a plurality of address electrodes are formed on the rear glass so as to cross and face the sustain electrode pair formed on the front substrate. (S206).

Subsequently, a lower dielectric layer is formed on an upper surface of the address electrode (S207), and a partition for partitioning the discharge cells of the plasma display panel is formed on the lower dielectric layer and a black layer is formed on the partition (S208).

Subsequently, the phosphor layer is formed in the discharge cells partitioned by the aforementioned partition walls, and the front substrate and the rear substrate are manufactured through respective drying and firing processes (S209).

The front substrate and the rear substrate manufactured as described above form a plasma display panel through a bonding process (S210 to S211).

Meanwhile, in the method of forming the plasma display panel of the present invention manufactured as described above, the method of forming the electrode of the front substrate will be described in detail with reference to FIG. 4.

4 is a process diagram sequentially showing a front substrate manufacturing process of the PDP according to the present invention.                     

As shown, first, the photosensitive metal paste layer A is formed on the glass substrate 10 (S301).

Here, the photosensitive metal paste includes at least one of copper (Cu) and silver (Ag), and further includes a predetermined photosensitive material. Further, the photosensitive metal paste layer A is preferably formed by β printing or vapor deposition.

Thereafter, a predetermined pattern is thermally cured from the upper portion of the photosensitive metal paste layer A (S302).

At this time, in the thermosetting step, as shown in FIG. 5, the heat generating mold 30 having the heating wire 31 having a predetermined pattern is brought close to the upper portion of the photosensitive metal paste layer A to thermally curing the corresponding pattern. It is preferable.

In addition, the heat generation temperature of the heating wire 31 will be preferably maintained at about 150 ℃ around the nature of the material.

Thereafter, the step of developing the glass substrate heat-cured above is performed (S303). When the glass substrate 10 undergoes the heat curing process, the heat-cured portion is hardened by the heating wire 31 pattern, and the uncured portion is weakened, and only the corresponding portion can be removed. Thus, sandblasting or etching is performed to remove the pattern except for the heat-cured portion.

After the developing step, the thermosetting photosensitive metal paste (A) on the glass substrate 10 is dried and baked at a temperature of about 500 to 600 ° C. to finally complete the process of forming the electrodes 11 and 12 ( S304 ~ S305).                     

As described above, according to the present invention, the electrode is formed on the glass substrate 10 of the plasma display panel by heat curing using the heat generating mold 30, thereby making it possible to harden the deep portion and thereby suppress the undercut phenomenon. Prevent the occurrence of phenomena.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the above-described embodiments, and the general knowledge in the field to which the present invention pertains without departing from the gist of the present invention claimed in the claims. Anyone with a variety of variations will be possible.

As described above, according to the electrode forming method of the plasma display panel according to the present invention, deepening can be performed by forming an electrode on the glass substrate of the plasma display panel by heat curing using a heat generating mold, thereby reducing the undercut phenomenon. There is an effect to suppress, thereby preventing the occurrence of edge phenomenon.

Claims (4)

A method of forming an electrode of a plasma display panel including a front substrate provided with a plurality of sustain electrode pairs including a transparent electrode and a bus electrode on a glass substrate, and a rear substrate provided with a plurality of address electrodes formed to cross the sustain electrode pair. To Forming a photosensitive metal paste layer on the glass substrate; Thermosetting a predetermined pattern from an upper portion of the photosensitive metal paste layer; And developing the thermally cured glass substrate. The method of claim 1, After the developing step, further comprising drying and firing the thermosetting photosensitive metal paste on the glass substrate to form an electrode. The method according to claim 1 or 2, The photosensitive metal paste includes at least one of copper (Cu) and silver (Ag). The method according to claim 1 or 2, Thermally curing the photosensitive metal paste layer; The method of forming an electrode of a plasma display panel, characterized in that the heating mold provided with a heating pattern of a predetermined pattern is heated to be close to the upper portion of the photosensitive metal paste layer.

Images