KR20060073311A - Method for making electrode of plasma display panel - Google Patents

Abstract

The present invention is to reduce the manufacturing cost of the panel and improve productivity by forming the electrode only on the portion where the actual pattern is formed on the glass substrate of the plasma display panel using DFR (Dry Film Photo Resist) A method of forming an electrode of a plasma display panel to prevent the occurrence. The present invention comprises the steps of laminating the DFR on the glass substrate; Placing a pattern mask on the glass substrate on which the DFR is laminated, and performing exposure and development according to specific conditions; Printing a metal paste only on a portion where the DFR is not formed on the glass substrate; Stripping off the DFR; After the peeling removal step of the DFR, drying and firing the metal paste printed on the glass substrate to form an electrode. Specific conditions in the exposure and development steps are; The pattern width and the separation distance of the pattern mask are set such that the DFR is formed in an inverted trapezoid by diffraction and refraction of light through the pattern mask. The metal paste is at least one of copper (Cu) or silver (Ag), and the metal paste is preferably formed in a trapezoid on the glass substrate.

Plasma, Panel, Glass, Electrode, DFR, Pattern, Trapezoidal, Edge, Printing, Peeling

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.

<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 C: Dry Film Photo Resist (DFR)

D: metal paste layer a: pattern width of pattern mask

b: separation distance of pattern mask

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 for forming an electrode 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, such a method of forming an electrode of a plasma display panel includes forming an electrode by a photo lithography method using an Ag electrode paste and a film, or etching through super deposition of Al or Cr-Cu-Cr. Although the method is used, the Ag electrode paste is printed on the entire surface of the glass substrate as described above, and development is eliminated except for the portion (about 30%) in which the actual pattern is formed, thereby unnecessary waste of resources. There was a problem that the manufacturing cost increases. In addition, there is a problem that the edge curl (Edge Curl) phenomenon that both ends of the electrode pattern is raised.

Accordingly, the present invention has been made to solve the above-mentioned conventional problem, by using the DFR (Dry Film Photo Resist) on the glass substrate of the plasma display panel to form an electrode only in the portion where the actual pattern is formed It is an object of the present invention to provide a method for forming an electrode of a plasma display panel which reduces manufacturing cost, improves productivity, and prevents occurrence of edge phenomenon.

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. CLAIMS 1. A method of forming an electrode of a plasma display panel, comprising: a rear substrate provided with a plurality of address electrodes facing each other, the method comprising: laminating a DFR on the glass substrate; Placing a pattern mask on the glass substrate on which the DFR is laminated, and performing exposure and development according to specific conditions; Printing a metal paste only on a portion where the DFR is not formed on the glass substrate; Peeling and removing the DFR; characterized in that it comprises a.

The method may further include drying and firing the metal paste printed on the glass substrate after the peeling and removing of the DFR to form an electrode.

Specific conditions in the exposure and development steps are; The pattern width and the separation distance of the pattern mask are set such that the DFR is formed in an inverted trapezoid by diffraction and refraction of light through the pattern mask.

The metal paste is at least one of copper (Cu) or silver (Ag), and the metal paste is preferably formed in a trapezoid on the glass substrate.

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, a dry film photo resist (DFR) C is laminated on the glass substrate 10 (S301).

Thereafter, the pattern mask B is positioned on the glass substrate 10 on which the DFR (C) is laminated, and the exposure and development processes according to specific conditions are sequentially performed (S302 to S303).

At this time, the specific conditions in the exposure and development step; The pattern width (a) and the separation distance (b) of the pattern mask (B) are appropriately set so that the DFR (C) is formed in an inverted trapezoid by the diffraction and refraction of light through the pattern mask (B). .

Accordingly, as shown in FIG. 4, an inverted trapezoidal DFR (C) is formed on the glass substrate 10.

Thereafter, the metal paste layer D is printed only on a portion where the DFR (C) is not formed on the glass substrate 10 (S304).

At this time, the metal paste is preferably at least one of copper (Cu) or silver (Ag), and the printing of the metal paste layer (D) is printed by a conventional screen printing method.                     

In addition, by the DFR (C) formed in the inverted trapezoid, the metal paste layer (D) printed between the DFR (C) is formed in a trapezoidal shape on the glass substrate 10, as shown.

Through the trapezoidal shape, the supporting force of both ends of the electrode pattern is increased, thereby preventing the occurrence of edge curl.

Thereafter, after drying the glass substrate 10 on which the metal paste layer D is printed, the DFR (C) is peeled off (S305 to S306).

In addition, after the peeling removal step of the DFR (C), the metal paste layer (D) printed on the glass substrate 10 by firing at a temperature of about 500 ~ 600 ℃, thereby forming the final electrodes (11, 12) Complete the process (S307).

As described above, the present invention uses the DFR (C) on the glass substrate 10 of the plasma display panel to form an electrode only in a portion where an actual pattern is formed, thereby preventing unnecessary waste of expensive photosensitive metal paste A. The manufacturing cost of the panel is reduced, the productivity is improved, and the occurrence of edge phenomenon is prevented through the trapezoidal electrodes 11 and 12.

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, by using the DFR on the glass substrate of the plasma display panel to form the electrode only in the portion where the actual pattern is formed, unnecessary waste of the photosensitive metal paste By reducing the manufacturing cost of the panel, improve the productivity, there is an effect that can prevent the occurrence of edge phenomenon through the trapezoidal electrode.

Claims (5)

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 Laminating a DFR on the glass substrate; Placing a pattern mask on the glass substrate on which the DFR is laminated, and performing exposure and development according to specific conditions; Printing a metal paste only on a portion where the DFR is not formed on the glass substrate; Peeling and removing the DFR; and forming an electrode of the plasma display panel. The method of claim 1, After the stripping removing step of the DFR, drying and firing the metal paste printed on the glass substrate to form an electrode. The method according to claim 1 or 2, Specific conditions in the exposure and development steps are; And a pattern width and a separation distance of the pattern mask are set such that the DFR is formed in an inverted trapezoid by the diffraction and refraction of light through the pattern mask. The method according to claim 1 or 2, The metal paste is at least one of copper (Cu) and silver (Ag). The method according to claim 1 or 2, And the metal paste is formed in a trapezoid on the glass substrate.

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