KR20060061506A - The method of making plasma display panel - Google Patents

Abstract

The present invention relates to a method of manufacturing a plasma display panel.

The present invention relates to a method of manufacturing a plasma display panel in which a black layer is formed on a plurality of transparent electrodes formed on a front substrate, the method comprising: aligning a mask having a first pattern on the front substrate on which the plurality of transparent electrodes are formed; Printing the black paste along the mask having the first pattern, arranging the mask having the second pattern on the front substrate on which the black paste is printed, and exposing the black paste along the mask having the second pattern. Forming a black layer.

In this way, the present invention reduces the manufacturing cost by minimizing the consumption of the black paste, which is a material of the black layer formed on the glass substrate of the plasma display panel.

Description

The method of making plasma display panel

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

2 is a view sequentially showing a front panel manufacturing process of a conventional PDP.

3 is a diagram showing a state in which a black paste for forming a black layer is printed on a front glass substrate of a panel during a manufacturing process of a conventional PDP.

Figure 4 is a process chart sequentially showing a manufacturing method of PDP according to the present invention

5 is a view sequentially showing a front panel manufacturing process of a PDP according to the present invention.

********** Description of the main parts of the drawing **********

60: front glass substrate 61a: transparent electrode

63a: dielectric layer 64: protective layer

70 mask having a second pattern

71: black layer

600: mask having a first pattern

The present invention relates to a mask for manufacturing a black layer of a plasma display panel and a method for manufacturing a plasma display panel using the same. More particularly, the present invention relates to a mask for manufacturing a black layer of a plasma display panel. A mask and a method of manufacturing a plasma display panel using the same.

In general, a plasma display panel includes a unit cell having a space between partition walls formed between a front substrate and a rear substrate, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne +). A main discharge gas such as He) and an inert gas containing a small amount of xenon (Xe) are 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 substrate on 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, which is a display surface on which an image is displayed. The back substrate 110 having the plurality of address electrodes 113 arranged so as to intersect the plurality of storage electrode pairs described above on the back glass 111 constituting the back surface 100 and the back surface is coupled 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 dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and facilitate discharge conditions on top of upper dielectric layer 104. For this purpose, 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. The upper surface of the rear substrate 110 is coated with R, G, and B phosphors 114 which emit visible light for image display during address discharge. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

On the other hand, although not shown in the drawing, silver (Ag) forming the bus electrodes 102b and 103b in the front glass substrate 100 is not known to transmit light due to discharge and reflects external light. There was a problem that made it bad. In order to solve this problem, a black layer has been conventionally formed between the transparent electrode 102a and the bus electrode 102b facing the partition wall of the rear glass substrate to improve contrast.

The manufacturing process for manufacturing the plasma display panel can be divided into pre-process, post-process and module process. The entire process consists of a variety of materials required for a given glass substrate so that the front and back substrates can be manufactured through black paste printing to form a black layer, paste printing for electrodes, exposure, development and firing. It is a film-coating process, and the post-process consists of the bonding of the front and rear substrates, exhaust, discharge gas injection and tip off, aging, and inspection. In addition, the module process is a final process of completing a plasma display panel, and is comprised of the steps of mounting and assembling a circuit.

2 is a process diagram sequentially illustrating a front panel manufacturing process of a conventional plasma display panel. As shown, the front panel of the conventional plasma display panel is first formed with a black layer on the front glass substrate 10 on which the transparent electrode 11a of indium tin oxide (ITO) material is formed, as shown in FIG. The black paste 31 of photosensitive material to be formed is printed by a screen-printing method and then dried to a predetermined temperature.

Thereafter, as shown in FIG. 2B, a photomask 30 having a predetermined pattern is placed on the printed and dried black layer 31 to irradiate ultraviolet rays to cure a portion of the black layer 31. Such a process is called an exposure process.

After that, as shown in FIG. 2C, the silver paste 11b for forming the bus electrode is printed on the black layer 31 by the screen-printing method similarly to the black layer 31. 2D, the upper side of the bus electrode also has a photomask having a predetermined pattern different from the photomask 30 having a predetermined pattern for forming the black layer 31 like the black layer 31. 30 'is placed and ultraviolet rays are irradiated to cure a portion of the bus electrode 11b.

Thereafter, as shown in FIG. 2E, when the development and firing are performed, the black layer 31 and the bus electrode 11b are formed on the transparent electrode 11a, and as shown in FIG. 2F, the transparent electrode, When the dielectric paste is applied on the front glass substrate having the bus electrode and the black layer and dried and baked, the dielectric layer 13a is formed.

Finally, as shown in FIG. 2 (g), when the protective layer 14 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 13a using various deposition methods such as CVD, ion plating, or vacuum deposition, plasma is formed. The front panel of the display panel is formed.

3 is a view showing a state in which a black paste 32 for forming a black layer is printed on a front glass substrate 31 of a panel during a manufacturing process of a conventional plasma display panel.

As shown in FIG. 3, in the conventional black layer forming process, the black paste 32 is printed over almost the entire portion of the front glass substrate 31, and then the remaining portion is removed except for the portion required through a predetermined process. Remove. Given that black pastes are quite expensive, such a process is a significant economic loss.

Accordingly, an object of the present invention is to provide a method of manufacturing a plasma display panel which reduces manufacturing cost by minimizing the consumption of black paste, which is a material of a black layer formed on a glass substrate of a plasma display panel.

In the method of manufacturing a plasma display panel of the present invention for achieving the above object, in the method of manufacturing a plasma display panel in which a black layer is formed on a plurality of transparent electrodes formed on a front substrate, a front surface on which a plurality of transparent electrodes is formed Aligning the mask with the first pattern on the substrate, printing the black paste along the mask with the first pattern, and aligning the mask with the second pattern on the front substrate on which the black paste is printed. And exposing the black paste along the mask having the second pattern to form a black layer.

The pattern width of the mask having the first pattern is larger than the pattern width of the mask having the second pattern.

The pattern width of the mask having the first pattern is 1.1 to 2.5 times the pattern width of the mask having the second pattern.

The first pattern corresponds to a portion including the entire portion of the non-discharge region between the plurality of transparent electrodes and a portion of the transparent electrode in contact with both ends of the non-discharge region.

The second pattern may correspond to a portion of the black paste printed on the front substrate.

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

4 is a process chart sequentially showing a method of manufacturing a PDP according to the present invention. As shown in FIG. 4, the PDP according to the present invention is manufactured through a front panel manufacturing process listed on the left side, a rear panel manufacturing process listed on the right side, and an assembly process of sealing the front panel and the rear panel.

First, referring to a front panel manufacturing process, after preparing a front glass as a base material of the front panel [100], a plurality of sustain electrode pairs formed of a pair of scan electrodes and sustain electrodes are formed on the front glass [110]. In this case, the scan electrode and the sustain electrode are formed of a transparent electrode and a bus electrode, and a black layer covering the non-discharge region is formed under the bus electrode in order to improve contrast characteristics. Then, a top dielectric layer is formed on the sustain electrode pair [120], and a protective layer made of MgO for protecting the sustain electrode pair is formed on the top dielectric layer to complete the front panel [130].

Subsequently, in the rear panel manufacturing process, as in the front panel, first, the rear glass is prepared [200], and a plurality of address electrodes are formed on the rear glass so as to face and cross the sustain electrode pair formed on the front panel [210]. Subsequently, a lower dielectric layer is formed on the upper surface of the address electrode [220], and a fluorescent layer is formed on the upper dielectric layer to complete the rear panel [230].

The front panel and the rear panel manufactured as described above are sealed to each other [300] to form a plasma display panel (PDP).

In the method of manufacturing the plasma display panel of the present invention manufactured as described above, the manufacturing process of the front panel including the black layer is as follows.

5 is a view sequentially showing a front panel manufacturing process of a PDP according to the present invention.

As shown in FIG. 5, the front panel of the plasma display panel of the present invention is first formed on the front glass substrate 60 on which the transparent electrode 61a of indium tin oxide (ITO) material is formed, as shown in (a). The mask 600 having one pattern is aligned.

Next, as shown in (b), the black paste for forming the black layer 71 is printed by a screen-printing method and then dried.

Next, as shown in (c), the mask 70 having the second pattern is aligned on the upper surface of the black layer 71.

Next, as shown in (d), a certain portion of the black layer 71 is cured by irradiating ultraviolet (UV).

This process is described in detail as follows.

First, as shown in (a) and (b), the mask 600 having the first pattern corresponding to the shape of the black layer wider than the width of the black layer is directly above the front glass substrate 60 on which the transparent electrode 61a is formed. Posted in At this time, the mask 600 and the transparent electrode 61a are spaced apart by the height of the black layer. Next, the black paste is printed on the upper portion of the front glass substrate 60 on which the transparent electrode 61a is formed by screen-printing, so that only the first pattern of the mask 600 is printed. Black paste can be saved.

After printing the black paste in this manner, the mask was removed, and as shown in (c) and (d), the mask 70 having the second pattern was aligned on the upper side of the black layer 71, and ultraviolet (UV) light was emitted. Irradiation hardens a portion of the black layer 71. At this time, the pattern width of the mask 70 having the second pattern used is smaller than the pattern width of the mask 600 having the first pattern to form the black layer 71. Preferably, the pattern width of the mask 600 having the first pattern is 1.1 times or more and 2.5 times or less the pattern width of the mask 70 having the second pattern to form the black layer 71.

Thereafter, as shown in (e), when developing and firing, the black layer 71 is formed on the front glass substrate 60 on which the transparent electrode 61a is formed. As shown in FIG. ) And a dielectric paste is applied on the front glass substrate 60 on which the black layer 71 is formed, and then dried and baked to form the dielectric layer 63a.

Finally, as shown in (g), when the protective layer 64 made of magnesium oxide (MgO) is formed on the surface of the dielectric layer 63a using various deposition methods such as CVD, ion plating, or vacuum deposition, the plasma display panel may be The front panel is formed.

As described above, a black layer is manufactured by using a mask having a predetermined pattern during the black layer manufacturing process of the plasma display panel, thereby minimizing the consumption of black paste used in the manufacture of the plasma display panel.

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

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following 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.

In this way, the present invention reduces manufacturing costs by minimizing the consumption of black paste, which is a material of the black layer formed on the glass substrate of the plasma display panel.

Claims (5)

In the method of manufacturing a plasma display panel to form a black layer on a plurality of transparent electrodes formed on the front substrate, Arranging a mask having a first pattern on a front substrate on which the plurality of transparent electrodes are formed; Printing a black paste along a mask having the first pattern; Arranging a mask having a second pattern on the front substrate on which the black paste is printed; And Exposing the black paste along the mask having the second pattern to form the black layer. The method of claim 1, The pattern width of the mask having the first pattern is larger than the pattern width of the mask having the second pattern. The method of claim 2, The pattern width of the mask having the first pattern is 1.1 to 2.5 times the pattern width of the mask having the second pattern. The method of claim 1, And the first pattern corresponds to a portion including an entire portion of the non-discharge region between the plurality of transparent electrodes and a portion of the transparent electrode in contact with both ends of the non-discharge region. The method of claim 1, And wherein the second pattern corresponds to a portion of the black paste printed on the front substrate.

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