KR20080085961A

KR20080085961A - Dielectric sheet of plasma display panel and manufacturing method using the same

Info

Publication number: KR20080085961A
Application number: KR1020070027432A
Authority: KR
Inventors: 임종래
Original assignee: 엘지전자 주식회사
Priority date: 2007-03-21
Filing date: 2007-03-21
Publication date: 2008-09-25

Abstract

A dielectric sheet of a plasma display panel and a manufacturing method using the same are provided to reduce a manufacturing cost and a process time by reducing the number of processes. A front substrate including plural pairs of sustain electrodes comprising scan electrodes and sustain electrodes, and an upper dielectric layer formed on the sustain electrodes. A rear substrate includes a plurality of address electrodes arranged across the sustain electrodes. A barrier rib is formed on the rear substrate in order to define a plurality of discharge cells. In a process for forming the upper dielectric layer, a dielectric sheet including a first dielectric layer and a second dielectric layer is formed on an upper glass including the sustain electrodes(S21). A photomask is positioned on the dielectric sheet in order to expose the dielectric sheet(S23). The upper dielectric layer is formed by developing and baking the exposed dielectric sheet(S25). The first dielectric layer having a differential thickness includes a photosensitive material.

Description

Dielectric sheet of plasma display panel and manufacturing method using the same

1 is a schematic diagram showing the structure of a plasma display panel in general.

2 is a flowchart illustrating an embodiment of a method of manufacturing a plasma display panel according to the present invention.

3A to 3D are views illustrating a manufacturing process of an embodiment of the method of manufacturing a plasma display panel according to the present invention.

100: front substrate 101: top glass

102 scan electrode 103 sustain electrode

104, 104 ': upper dielectric layer 105: protective film

1041: first dielectric layer 1043: second dielectric layer

1045: dielectric sheet 107: photo mask

110: rear substrate 111: bottom glass

112: partition 113: address electrode

114 phosphor 115 lower dielectric layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly to a differential dielectric formed on a top plate of a plasma display panel.

In general, each plasma cell is partitioned by a partition wall formed between a front substrate and a rear substrate of a plasma display panel (PDP). Each discharge cell is filled with an inert gas containing a small amount of xenon and a main discharge gas such as neon (Ne), helium (He), or a mixed gas (Ne + He) of neon and helium. When discharge is generated by a high frequency voltage, the inert gas generates vacuum ultraviolet rays to emit phosphors between the partition walls, thereby realizing an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 is a schematic diagram showing the structure of a typical plasma display panel. As illustrated in FIG. 1, a plurality of scan electrodes 102 and sustain electrodes 103 are formed in pairs on the front glass 101, which is a display surface on which an image is displayed, on the front substrate 100 of the plasma display panel. Sustain electrode pairs of are arranged. In addition, the rear substrate 110 includes a plurality of address electrodes 113 arranged on the rear glass 111 to intersect the plurality of sustain electrode pairs described above, and the rear substrate 110 and the front substrate 100 are Combined in parallel at a certain distance.

First, the front substrate 100 includes 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 each other in one discharge cell and maintain light emission of the discharge cell. The sustain electrode pair is formed by pairing the scan electrode 102 and the sustain electrode 103 made of a bus electrode b made of a pair. The scan electrode 102 and the sustain electrode 103 are covered by an upper dielectric layer 104 that limits the discharge current and insulates the electrode pairs, and on the upper dielectric layer 104 magnesium oxide (to facilitate the discharge conditions) A protective layer 105 on which MgO) is deposited is formed.

Next, the rear substrate 110 is arranged in such a manner that a plurality of discharge spaces, that is, partitions 112 of stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 for performing address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall. 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, in such a general plasma display panel, the upper dielectric layer 104 formed on the front substrate 110 forms wall charge to hold the discharge by the discharge sustain voltage, and to prevent the electrode from ion bombardment during the discharge of the plasma. It protects and serves as a diffusion barrier and also serves as a base layer for the protective film 105.

In a typical plasma display panel having such a structure, in order to increase the discharge region, the distance between the scan electrode and the sustain electrode should be far apart, that is, arranged in a long gap structure. However, such a long gap structure increases the discharge start voltage, so that a differential dielectric is formed to reduce the discharge voltage, but the method of manufacturing the same increases the trouble and cost of forming the dielectric upper and lower layers twice. There is this.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a dielectric sheet using a plasma display panel having a simple process for forming a differential dielectric in a long gap structure, and a manufacturing method using the same.

In order to achieve the above object, the dielectric sheet according to the present invention comprises a first dielectric layer containing a photosensitive material and a second dielectric layer in contact with the first dielectric layer.

In addition, in order to achieve the above object, the plasma display panel manufacturing method according to the present invention is arranged to cross the front substrate and the upper dielectric layer formed on the plurality of sustain electrode pairs consisting of a scan electrode and a sustain electrode, and the plurality of sustain electrode pairs A method of manufacturing a plasma display panel comprising a rear substrate having a plurality of address electrodes formed thereon and partition walls formed to partition a plurality of discharge cells on the rear substrate, wherein the forming of the upper dielectric layer includes a sustain electrode pair. Forming a dielectric sheet comprising a first dielectric layer and a second dielectric layer up and down on the upper glass; exposing the dielectric sheet by placing a photo mask on the dielectric sheet; and developing and firing the exposed dielectric sheet. The thickness of the dielectric sheet Forming an upper upper dielectric layer, wherein the first dielectric layer preferably comprises a photosensitive material.

Hereinafter, embodiments of the dielectric sheet of the plasma display panel according to the present invention and a manufacturing method using the same will be described with reference to the drawings. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited. In addition, the same components as in the prior art are given the same names and the same reference numerals for convenience of description, and detailed description thereof will be omitted.

2 is a flowchart illustrating an embodiment of a method of manufacturing a plasma display panel according to the present invention, and FIGS. 3A to 3D are views illustrating a manufacturing process of an embodiment of the method of manufacturing a plasma display panel according to the present invention.

Referring to FIGS. 2 and 3A to 3D, a method of manufacturing a plasma display panel according to the present invention will be described as follows.

The plasma display panel manufacturing method according to the present invention is largely divided into a glass manufacturing process, a front substrate manufacturing process, a partition wall and a rear substrate manufacturing process, and an assembly process.

First, the manufacturing process of the front substrate 100, as shown in Figure 3a, to form a sustain electrode pair consisting of a scan electrode 102 and the sustain electrode 103 on the upper glass 101. Next, as illustrated in FIG. 3B, a dielectric sheet 1045 formed of a first dielectric layer 1041 and a second dielectric layer 1043 is formed on the upper plate glass 101 on which the plurality of sustain electrode pairs are formed. (S21). Next, as illustrated in FIG. 3C, the dielectric sheet 1045 is exposed by placing a photo mask 107 on the dielectric sheet 1045 (S23). Next, as illustrated in FIG. 3D, the exposed dielectric sheet 1045 is developed and baked to form the upper dielectric layer 104 ′ having a differential thickness of the dielectric sheet 1045 (S25). Next, the differentially formed dielectric sheet is fired to form the upper dielectric layer 104 '(S27). Finally, a protective film (not shown) on which magnesium oxide (MgO) is deposited may be formed on the upper dielectric layer 104 ′ to facilitate discharge conditions.

Here, in the method of manufacturing a plasma display panel according to the present invention, the forming of the dielectric sheet 1045 is preferably performed by using a laminating process. In the case of forming a conventional differential dielectric, the lower and upper dielectric layers were separately formed using a printing method or a laminating process. However, according to the present invention, the first and second dielectric layers 1041 and 1043 may be formed up and down. The number of processes is reduced by applying the made dielectric sheet 1045 onto the top glass using a laminating process.

In the plasma display panel manufacturing method according to the present invention, the first dielectric layer 1041 preferably includes a photosensitive material, and the second dielectric layer 1043 preferably includes a non-photosensitive material. This is to form a pattern only on the first dielectric layer by exposure and development by forming the upper layer of the dielectric sheet 1045 as a dielectric layer containing a photosensitive material.

In this case, when the exposed dielectric sheet 1045 is formed, the depression 109 may be formed only in the first dielectric layer 1041. That is, in the second dielectric layer 1043 including the non-photosensitive material, the depression is not formed by exposure and development, and the depression 109 is formed only in the first dielectric layer 1041 including the photosensitive material.

In addition, the shape of the depression may be rectangular as shown in FIG. 3D, and may vary, such as tapered or stepped or arcuate. Here, the taper type (not shown) is a shape that decreases linearly as the width of the depression toward the top, the arch type (not shown) increases gradually decreases toward the top of the width, A stepped shape (not shown) refers to a shape in which the width of the depression decreases in stages.

Processes other than the above-described manufacturing process of the front substrate are the same as the manufacturing process of the conventional plasma display panel.

As mentioned above, preferred embodiments of the present invention are disclosed for purposes of illustration, and those skilled in the art can improve and change various other embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. , Replacement or addition would be possible.

As described above, the method for manufacturing a plasma display panel according to the present invention has the effect of reducing the number of processes, saving costs, and shortening the process time.

Claims

A first dielectric layer comprising a photosensitive material; And

And a second dielectric layer in contact with the first dielectric layer.

A front substrate having an upper dielectric layer formed on a plurality of sustain electrode pairs consisting of a scan electrode and a sustain electrode, a rear substrate having a plurality of address electrodes arranged to intersect the plurality of sustain electrode pairs; In the plasma display panel manufacturing method comprising a partition wall formed to partition each discharge cell,

Forming the upper dielectric layer

Forming a dielectric sheet comprising a first dielectric layer and a second dielectric layer on the upper plate glass provided with the sustain electrode pairs;

Exposing the dielectric sheet by placing a photo mask over the dielectric sheet; And

Developing and firing the exposed dielectric sheet to form the upper dielectric layer with a differential thickness of the dielectric sheet,

And the first dielectric layer comprises a photosensitive material.

The method of claim 2,

And forming the dielectric sheet using a laminating process.

The method of claim 2,

And the second dielectric layer comprises a non-photosensitive material.

The method of claim 2,

When developing the exposed dielectric sheet, a depression is formed only in the first dielectric layer.