KR20060038806A - Electrode manufacturing method of plane diplay device for multi screen - Google Patents

Abstract

The present invention discloses a method for forming an electrode of a flat panel display panel.

An electrode forming method of a flat panel display panel includes a dispenser in a flat panel display panel in which a front substrate on which X and Y electrodes are formed and a rear substrate on which an address electrode is formed are hermetically sealed in parallel at a predetermined interval. By using a continuous discharge of a conductive material on the substrate in the form of dots or lines to form a pattern of the electrode, in particular in the case of forming a side electrode of the multi-flat display panel, an electrode pad is formed on the rear surface of the rear substrate, After forming the extension portion extending the X, Y electrodes on the side of the front substrate to seal the front substrate and the back substrate, and continuously dispensing the conductive material on the upper surface of the sealed seal and the side of the back substrate. By electrically connecting the extension portion and the electrode pad. As such, by forming the electrode using the dispensing method, the PDP of the present invention can freely change the alignment and pitch between the electrodes, and more particularly, form side electrodes of the panel more stably when manufacturing PDP for forming a multi-screen. can do.

Description

Electrode manufacturing method of flat display panel {Electrode manufacturing method of plane diplay device for multi screen}

1 is an exploded perspective view showing the configuration of a general PDP.

Figure 2 is a view showing the appearance of forming an electrode on the substrate using a dispenser (dispenser) in accordance with the present invention.

3 to 5 are views illustrating a process of forming an electrode on a side of a panel to form a plasma display panel for a multi-screen.

6 is a cross-sectional view showing in more detail the connection relationship between the side electrode formed through the process of FIGS.

7 is a cross-sectional view showing a method of forming a side electrode according to another embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode forming method of a flat panel display panel. More particularly, the present invention relates to an electrode forming method of a plasma display panel in which electrodes are formed on front and rear substrates and side surfaces of the panel using a dispensing method.                         

PDP is a light emitting device that displays an image by exciting phosphor formed in a discharge cell.It is light compared to the existing CRT (Cathod Ray Tube), its manufacturing process is simple, and its thin and large screen makes it easy to display the status of stock exchanges. As a video display device used for video conferencing displays and large wall-mounted TVs in recent years, its use has been greatly increased.

1 is an exploded perspective view showing the structure of a general PDP.

In the PDP, the front substrate 10 having the X electrode and the Y electrode and the rear substrate 20 having the address electrode are sealed in parallel with a predetermined distance therebetween.

The front substrate 10 is composed of an X electrode and a Y electrode for maintaining light emission of a cell described later by mutual discharge in one pixel, and the X electrode and the Y electrode are transparent electrodes (or ITO electrodes) formed of a transparent ITO material. (X1, Y1) and bus electrodes X2, Y2 made of metal. The X electrode and the Y electrode are covered by the dielectric layer 12 which limits the discharge current and insulates the electrode pairs, and a protective film 13 such as a magnesium oxide (MgO) film is formed on the upper surface thereof.

The rear substrate 20 has a plurality of discharge spaces, that is, stripe-type (or dot-type) barrier ribs 21 for forming the cells C and are arranged vertically while maintaining parallel electrodes, and electrodes X and Y. The address electrode A is disposed in parallel with the partition wall 21 so as to cross each other, and a dielectric layer 23 is formed on the upper side thereof. In addition, the upper side surface of the rear substrate 20 is coated with the R.G.B fluorescent layer 24 that emits visible light for image display at the address discharge except the upper surface of the partition wall 21.                         

As a method of forming an electrode in such a PDP, by placing a pattern mask on the substrate, and then by printing the mask beta or electrode beta to form a pattern by pushing with a squeeze of the printing machine and then developed in a desired pattern using a photomask and ultraviolet light Techniques such as photolithography, which leave only the pattern portion, are used.

By the way, in the case of the mask printing method, the material and process cost is reduced, but the line width or pitch of the electrode is very sensitive to the manufacturing state and management state of the mask, and it is difficult to manage the mask itself. There is this. In addition, the photolithography method is excellent in its properties, but a lot of material loss, there is a problem that the manufacturing cost is high due to the increase in equipment and processes.

Furthermore, in the case of forming a multi-screen plasma display panel forming a large screen by contacting a plurality of PDPs on the same plane for a large screen, the electrode is formed on the rear substrate to reduce dead zones formed on the contact surfaces between the panels. The process of drawing out to the back of (20) is needed.

To this end, in the case of using a printing electrode or a photosensitive electrode as in the prior art, there is a very high possibility that an open or short of the electrode may occur depending on the shape of the substrate side, the degree of processing, and the shape of the side sealing material. have. Moreover, when using the printing method, it takes a long time to accurately maintain or change the gap between the electrodes, and the possibility of alignment defects due to deformation of the mask is also high. In addition, in the printing method, there is a limit in increasing the thickness of the electrode, and there is a possibility that heat generation and break-down may occur in a portion where the pattern is uneven when using a low conductive material.

Accordingly, an object of the present invention for solving the above problems is to improve the electrode forming method of the plasma display panel to freely change the alignment and pitch between the electrodes, and to enable more stable electrode formation.

In order to achieve the above object, an electrode forming method of a flat panel display panel according to the present invention may include an airtight seal in parallel at a predetermined interval between a front substrate on which X and Y electrodes are formed and a rear substrate on which address electrodes are formed. In the flat panel display, a pattern of the electrode is formed by continuously discharging a conductive material on a substrate in a dot or line form using a dispenser.

In this case, in a method of forming side electrodes of a multi-panel display panel, an electrode pad is formed on a rear surface of the rear substrate, and an extension part extending from the X and Y electrodes is formed on a side of the front substrate to form the front substrate and the substrate. After sealing the rear substrate, the conductive material is continuously dispensed on the upper surface of the sealed seal and the side surface of the rear substrate to electrically connect the extension and the electrode pad.

According to another exemplary embodiment of the present invention, a method of forming an electrode of a flat panel display panel includes a flat display in which a front substrate on which X and Y electrodes are formed and a rear substrate on which address electrodes are formed are hermetically sealed in parallel at a predetermined interval. In the panel, the electrodes are formed of printed electrodes, and electrode pads are formed on the rear surface of the rear substrate, and then a dispenser is used to continuously discharge conductive material in the form of dots or lines on the side of the hermetically sealed panel. By fencing, the electrodes and the electrodes of the electrode pad are connected in a one-to-one correspondence.

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

FIG. 2 is a view illustrating shapes of electrodes formed by dispensing a conductive material on a substrate using a dispenser according to the present invention.

In the present invention, unlike the conventional printing method or photolithography method by using a dispensing method by continuously discharging the conductive material on the substrate in the form of dots or lines, directly electrodes (X electrode, Y electrode, address on the substrate without a mask) Electrode) pattern is formed.

In one embodiment of the dispenser used in the present invention, a predetermined amount of conductive material corresponding to an increase in the pressure in the cylinder is applied to a nozzle by applying a predetermined amount of air supplied from a constant pressure source into a cylinder. The dispenser discharged through is used. Of course, you may use the dispenser of the other system conventionally used.

As an electrode forming method using such a dispenser, as shown in FIG. 2A, each electrode is sequentially formed one by one on the substrate or on the side of the substrate by using a single dispenser 40 that receives the conductive material from the liquid supply device 30 using air pressure. (Single dispenser method), or in order to shorten the processing time, as shown in FIG. 2B, the plurality of dispensers are arranged in parallel at a predetermined interval (inter-electrode spacing), and the plurality of dispensers are controlled to discharge the conductive material while moving them simultaneously. Electrode patterns can be formed simultaneously (multi dispenser method).

At this time, as a method of patterning a plurality of electrodes at the same time, without using a plurality of dispensers as shown in Figure 2b, as shown in Figure 2c a plurality of nozzles are connected to the outlet of one dispenser 41 at regular intervals By allowing the conductive material to be discharged at the same time, a plurality of electrodes may be simultaneously formed (multi nozzle method). However, in this case, as the number of nozzles corresponding to one dispenser 41 increases, the amount of conductive materials discharged from the nozzles may not be uniform. Therefore, separate control may be required.

By appropriately adjusting the discharge amount, pressure, and number of nozzles of the conductive material for dispensing, the line width and pitch of the X, Y, and address electrodes patterned on the side of the display area, the electrode pad area, and the panel (or substrate) of the substrate ( pitch) can be easily adjusted, and the thickness of each electrode can be easily adjusted. In addition, a valve (not shown), which is a separate mechanism, may be used to discharge the conductive material at a small amount, and the alignment equipment may be used to precisely control and change the position at which the conductive material is discharged.

In addition, the dielectric layer 12 and the passivation layer 13 are formed on the X and Y electrodes formed by the dispensing method, the partition wall 21 is formed on the rear substrate 20, and the dielectric layer 23 and Since the process of forming the R, G, B phosphor layer 24 is the same as in FIG. 1, detailed description thereof will be omitted.

At this time, as the dielectric layers 12 and 23, an insulating polymer or ceramic material is used to protect the electrode that is hardened and fixed according to the dispensing method. After the formation of the electrode, a post-treatment process (heat treatment, UV treatment, firing) is performed according to the conductive material. When using an epoxy electrode as the conductive material, the firing temperature of the electrode may be about 150 to 200 ° C. Or lower than 550 ° C. in the case of forming the photosensitive electrode.

3 to 5 are diagrams illustrating a process of forming an electrode on a side of a panel to form a plasma display panel for a multi-screen.

When a plurality of plasma display panels are connected on the same plane to form a multi screen, it is necessary to pull out the X and Y electrodes of the front substrate 10 to the rear surface of the rear substrate 20 to eliminate the seam between panels. There is. To this end, electrode pads (X _c or Y _c ) are formed on the rear surface of the rear substrate 20, and the X and Y electrodes of the front substrate 10 are electrically connected to the electrode pads (X _c or Y _c ). The electric conduction (X _b or Y _b ) should be formed on the side of the panel, that is, on the upper surface of the sealing portion S for sealing between the front substrate 10 and the rear substrate 20. In the present invention, in forming the PDP for the multi-screen, the electrodes formed on the side of the panel also use the above-described dispensing method.

The process of forming the side electrodes will be described in more detail as follows.

First, when forming the X, Y electrodes (X ₁ , X ₂ , ..., Y ₁ , Y ₂ , ...) on the front substrate 10 by using the dispensing method as described above, the electrodes (X ₁ , X _{2) , ..., Y 1, Y 2} , ...) to form the extended portion (X _a or Y _a) extends to the side of the substrate 10. At this time, the extension (X _a or Y _a ), when sealing the front substrate 10 and the rear substrate 20 by using the sealing material, as shown in Figure 4, by the sealing portion (S) in the sealing process completely. It is formed to have a length such that a portion thereof can be exposed without being covered.

Next, after the front substrate 10 and the rear substrate 20 are sealed, the extension portions X _a or Y _a and the electrode pads X _c or Y _c , which are not covered by the sealing portion S, are respectively In order to be electrically connected in a one-to-one correspondence, the conductive material is discharged to the upper surface of the sealing unit S by using the above-described dispensing method to form an electrical conductivity X _b or Y _b .

When the address electrode A of the rear substrate 20 is connected to the electrode pad, although not shown in FIG. 3, when the address electrode A is formed on the rear substrate 20 by using a dispensing method, the rear surface of the rear substrate 20 is formed on the rear surface of the rear substrate 20. By extending up to the electrode pad, it is possible to pull out the electrode to the electrode pad in a single process.

6 is a cross-sectional view illustrating in detail the connection relationship between the side electrodes formed through the process of FIGS. 3 to 5 described above.

In the above-described embodiment, the electrodes formed on the top of the substrates 10 and 20 and the electrodes formed on the side thereof are all formed by using a dispensing method. The electrode pad formed on the rear surface of the substrate 20 is formed by a mask printing or photolithography method as in the prior art, and the side surface of the substrate 10 for drawing the electrode of the front substrate 10 to the rear surface of the rear substrate 20. And only the electrodes formed on the upper surface of the sealing portion (S) may be formed using a dispensing method. In this case, the electrode formed on the substrate is extended to the side of the substrate by a dispensing method. As shown in FIG. 7, a part of the end of the electrode (X or Y) formed on the substrate overlaps with the conductive material forming the side electrode. An extension portion X _a or Y _a is formed on the side of the substrate 10 while discharging the conductive material at the end of the electrode X or Y with a dispenser.

As described above, the PDP of the present invention can freely change the alignment and pitch between electrodes by forming an electrode by using a dispensing method, and more particularly, when the PDP is manufactured for multi-screen formation, Side electrodes can be formed.

Claims (4)

A method of forming an electrode of a flat panel display panel in which a front substrate on which X and Y electrodes are formed and a rear substrate on which an address electrode is formed are hermetically sealed in parallel at a predetermined interval. And forming a pattern of the electrode by continuously discharging a conductive material on the substrate in a dot or line form using a dispenser. The method of claim 1, An electrode pad is formed on a rear surface of the rear substrate, and the conductive material is dispensed on the side surface of the hermetically sealed panel to connect the electrodes and the electrodes of the electrode pad in a one-to-one correspondence. Electrode formation method. The method of claim 2, After forming the extending portion to extend the X, Y electrodes on the side of the front substrate, the front substrate and the rear substrate is sealed, and the conductive material is continuously discontinued on the upper surface of the sealed seal and the side of the rear substrate. And fencing the extension part and the electrode pad to electrically connect the extension part to the electrode pad. A method of forming an electrode of a flat panel display panel in which a front substrate on which X and Y electrodes are formed and a rear substrate on which an address electrode is formed are hermetically sealed in parallel at a predetermined interval. The electrodes are formed of printed electrodes, and electrode pads are formed on the rear surface of the rear substrate, and then, the dispenser is continuously dispensed in the form of dots or lines on the side of the hermetically sealed panel using a dispenser. And electrodes of the electrode pads in a one-to-one correspondence.

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