KR100736583B1 - Plasma Display Panel - Google Patents

Abstract

The present invention relates to a plasma display panel.

The plasma display panel according to the present invention includes a first bus electrode formed on the front glass and a second bus electrode formed on the first bus electrode.

Therefore, the present invention does not have a possibility of generating an open site by sequentially forming a bus electrode when forming a bus electrode, so there is no pattern inspection process and a repair process of the bus electrode, thereby improving the production yield of the plasma display panel. .

Description

Plasma Display Panel

1 is a view showing the structure of a conventional plasma display panel.

2 is a process chart sequentially showing a front panel manufacturing process of a conventional plasma display panel.

3 is a cross-sectional view showing the structure of a front panel of a plasma display panel according to the present invention;

<Explanation of symbols for the main parts of the drawings>

300: front panel 301: front glass

302a, 302b: transparent electrode 304a, 304b: first bus electrode

306a and 306b: second bus electrode 308: dielectric layer

310: protective layer

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a bus electrode of a front panel is improved.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as 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 shown in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front glass 101 that is a display surface on which an image is displayed. A rear panel 110 having a plurality of address electrodes 113 arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front panel 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. The scan electrode 102 and the sustain electrode 103 are covered by a dielectric layer 104 which limits the discharge current and insulates the electrode pairs, and the upper surface of the upper dielectric layer 104 is made of magnesium oxide to facilitate discharge conditions. A protective layer 105 on which MgO) is deposited is formed.

The rear panel 110 is arranged in such a manner that a plurality of discharge spaces, that is, stripe-type partitions 112 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 panel 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.

Looking at the front panel manufacturing process of the plasma display panel as shown in FIG.

 2 is a process diagram sequentially illustrating a front panel manufacturing process of a conventional plasma display panel.

As shown in FIG. 2, in step (a), a transparent electrode 201 of indium tin oxide (ITO) material including indium oxide and tin oxide is formed on the front panel 200.

Looking at an example of the method of forming the transparent electrode 201, a photo is formed by laminating a dry film photoresist (DFR) on the transparent electrode film formed of ITO material. After exposure with a pattern of a photo mask, a transparent electrode for scanning and a transparent electrode for sustain are formed through a development and etching process.

Subsequently, in step (b), the black paste for forming the black layer 202 is printed on the front glass 200 on which the scan transparent electrode and the sustain transparent electrode are formed, and then dried at about 120 ° C., In the step (c), a photo mask 205 having a predetermined pattern formed on the dried black paste is placed and dried by irradiating with ultraviolet rays. This process is called photolithography.

In the step (d) on the black layer 202 subjected to the exposure process, silver (Ag) paste is applied and printed to form the bus electrode 203, and then dried.

Thereafter, in step (e), the photomask 206 having a predetermined pattern is placed on the coated silver (Ag) paste and exposed. After the exposure process, in step (f), the uncured portion is developed and then fired in a calcination furnace (not shown) for about 550 ° C. for about 3 hours to form a bus electrode for scan electrodes and a bus electrode for sustain. .

Thereafter, in step (g), the dielectric layer 207 is formed on the front glass on which the scan electrode and the sustain electrode are formed. As an example of the method of forming the dielectric layer 207, the dielectric glass paste is applied and dried, and then fired at a temperature of about 500 ° C to 600 ° C to form a dielectric layer.

Finally, in step (h), a protective layer 208 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 207 by CVD, ion plating, vacuum deposition, or the like to form a front surface of the plasma display panel. The panel is complete.

In the method of manufacturing a front panel of the conventional plasma display panel, after forming the transparent electrode and the bus electrode, the pattern of the bus electrode for checking whether the bus electrode is opened is examined before firing by heating to a temperature of about 550 ° C. . At this time, if the bus pole is open, go through the repair process to connect the open part and check again whether the bus electrode is open. Finally, when no open portion is present in the bus electrode, it is heated to a temperature of about 550 ° C. and fired.

As described above, in the conventional method of manufacturing a front panel of the plasma display panel, a pattern inspection process and a repair process exist to confirm whether the bus electrode is open. Accordingly, the conventional method for manufacturing the front panel of the plasma display panel requires a pattern inspection process and a repair process, and thus there is a problem in that the production cost is high and the yield is low because there are many processes.

On the other hand, in the conventional method of manufacturing a front panel of a plasma display panel, when a bus electrode is opened, a signal is not transmitted to a panel displaying a screen, and thus misdischarge is likely to occur.

Accordingly, an object of the present invention is to provide a plasma display panel which can improve the production rate of a plasma display panel by increasing the opening ratio of the transparent electrode and reducing the number of processes by improving the bus electrode of the plasma display panel.

The plasma display panel according to the present invention for achieving the above object includes a first bus electrode formed on the front glass and a second bus electrode formed on the first bus electrode.

The width of the second bus electrode is narrower than the width of the first bus electrode.

The first bus electrode has a width of 70 µm or more and 80 µm or less.

The width of the second bus electrode is 30% or more and less than 100% of the width of the first bus electrode.

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

3 is a cross-sectional view illustrating a structure of a front panel of a plasma display panel according to the present invention.

Before looking at Figure 3, the plasma display panel according to the present invention is a front panel and a rear glass forming a rear panel and a plurality of sustain electrode pairs formed by pairing a scan electrode and a sustain electrode on the front glass which is a display surface on which an image is displayed A rear panel in which a plurality of address electrodes are arranged so as to intersect the plurality of sustain electrode pairs above is coupled in parallel with a predetermined distance therebetween.

As shown in FIG. 3, the front panel 300 of the plasma display panel according to the present invention includes a pair of ITO transparent electrodes 302a and 302b formed by pairing a scan electrode and a sustain electrode on the front glass 301. First bus electrodes 304a and 304b and second bus electrodes 306a and 306b are formed on the upper and upper portions of the transparent electrodes 302a and 302b to improve conductivity due to the decrease in resistance of the transparent electrodes 302a and 302b. The first bus electrodes 304a and 304b formed as described above are preferably made of a material having low resistance and high conductivity, such as silver (Ag), copper (Cu), or the like. At this time, the widths of the first bus electrodes 304a and 304b are 70 µm or more and 80 µm or less, and the thickness is 3 µm or more and 4 µm or less. In the case where the width of the first bus electrode is less than 70 μm, sufficient conductivity characteristics cannot be secured. When the width of the first bus electrode is greater than 80 μm, the aperture ratio of the plasma display panel is reduced.

In addition, the second bus electrodes 306a and 306b may be formed of a material having low conductivity and high conductivity, such as silver (Ag) or copper (Cu), which are the same as the first bus electrodes 304a and 304b. In this case, the widths of the second bus electrodes 306a and 306b are 30% or more and less than 100% of the widths of the first bus electrodes 304a and 304b.

The second bus electrodes 306a and 306b formed as described above are reduced by preventing the opening of the first bus electrodes 304a and 304b generated by the firing process and by reducing the width of the first bus electrodes 304a and 304b. Will compensate for conductivity.

The dielectric layer 308 and the protective layer 310 are sequentially formed on the first bus electrodes 304a and 304b and the second bus electrodes 306a and 306b formed as described above, so that the front surface of the plasma display panel according to the present invention is formed. The panel is formed.

On the other hand, the method of manufacturing the front panel of the plasma display panel according to the present invention is the same as the method of forming the bus electrode of the conventional plasma display panel shown in Figure 2, the first bus electrodes (304a, 304b) and the first The only difference is that the two bus electrodes 306a and 306b go through the manufacturing process for forming the bus electrodes twice.

However, since the second bus electrodes 306a and 306b having the same function are formed on the first bus electrodes 304a and 304b, an open part is formed in the first bus electrodes 304a and 304b and the second part is again formed thereon. Since the bus electrodes 306a and 306b are formed, there is no possibility that the bus electrodes can be opened.

Accordingly, the first bus electrodes 304a and 304b and the second bus electrodes 306a and 306b are immediately fired after the pattern is formed without the pattern inspection step and the repair step, and then the first bus electrodes 304a and 304b and the second bus. Bus electrodes 306a and 306b can be formed.

As a result, since the second bus electrodes 306a and 306b having the same function are formed on the first bus electrodes 304a and 304b, the width of the first bus electrodes 304a and 304b which determines the aperture ratio is reduced while the bus electrodes are used. The number of steps can be greatly reduced because the pattern inspection step and the repair step can be omitted. At the same time, as the width of the bus electrode is reduced, the resistance is lowered and electrical conductivity is compensated.

On the other hand, the above description has been described that the second bus electrodes 306a and 306b are formed on the first bus electrodes 304a and 304b, but the second bus electrodes 306a and 306b are the first bus electrodes 304a and 304b. It may be formed on the side of). When the second bus electrodes 306a and 306b are formed on the side surfaces of the first bus electrodes 304a and 304b, as a result, they have the same structure as the conventional bus electrodes, but the same parts because two bus electrodes are formed twice. Since there is almost no possibility of opening both times, the second bus electrodes 306a and 306b need to be subjected to a pattern inspection process or a repair process in the same manner as those formed on the first bus electrodes 304a and 304b. none.

In addition, although the width of the second bus electrodes 306a and 306b is smaller than the width of the first bus electrodes 304a and 304b, the width of the second bus electrodes 306a and 306b is equal to the width of the first bus electrodes 304a and 306b. It may be equal to or wider than the width of 304b). However, even if the width of the second bus electrodes 306a and 306b is wider than the width of the first bus electrodes 304a and 304b, the width of the second bus electrodes 306a and 306b is preferably narrower than that of the conventional bus electrode.

As described above, it will be understood by those skilled in the art that the technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, in the present invention, the bus electrodes of the front panel are sequentially formed to prevent the opening of the bus electrodes so that the pattern inspection process and the repair process do not exist.

Accordingly, by reducing the number of front panel manufacturing processes of the plasma display panel, the production cost of the plasma display panel is lowered, thereby improving the production yield.

In addition, the present invention has the effect of increasing the aperture ratio of the transparent electrode by reducing the bus electrode width of the front panel to improve the brightness of the plasma display panel.

Claims (4)

A first bus electrode formed on the front glass; And a second bus electrode formed on the first bus electrode. And a width of the first bus electrode is 70 µm or more and 80 µm or less. The method of claim 1, The width of the second bus electrode is narrower than the width of the first bus electrode. The method of claim 1, And the width of the second bus electrode is 30% or more and less than 100% of the width of the first bus electrode. A first bus electrode formed on the front glass; A second bus electrode formed on the first bus electrode; And a width of the second bus electrode is 30% or more and less than 100% of the width of the first bus electrode.

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