KR20070073516A - Bus electrode green sheet and a method for fabricating plasma display panel by thereof - Google Patents

Abstract

A bus electrode green sheet and a method for fabricating a plasma display panel using the same are provided to form easily a bus electrode pattern by forming a bus electrode dry film with a two-layered structure of an organic photoresist layer and a bus electrode layer. A bus electrode green sheet includes a bus electrode dry film and a protective film(24,25). The bus electrode dry film includes an organic photoresist layer(23) and a bus electrode layer(22). The organic photoresist layer is formed of a photosensitive organic material. The bus electrode layer includes Ag powder and an organic material developed by a developer irrespective of exposure. The protective film is formed on an upper part and a lower part of the bus electrode dry film in order to protect the bus electrode dry film.

Description

BUS ELECTRODE GREEN SHEET AND A METHOD FOR FABRICATING PLASMA DISPLAY PANEL BY THEREOF}

1A to 1C are cross-sectional views of an exemplary embodiment of a conventional plasma display panel manufacturing process.

2 is a plan view of a top plate structure of a conventional plasma display panel.

FIG. 3 is a sectional view of each region shown in FIG. 2; FIG.

4 is a plan view of the top plate structure of the plasma display panel according to the present invention;

Fig. 5 is a sectional view of each area shown in Fig. 4;

6 is a block diagram of a BM green sheet (a) and a bus electrode green sheet (b) according to the present invention;

7A to 7E are cross-sectional views of one embodiment of a process of manufacturing a plasma display panel of the present invention.

** Description of the symbols for the main parts of the drawings **

21: BM dry film 22: bus electrode layer

23: organic photosensitive layer 30: BM

40: bus electrode

The present invention relates to a bus electrode green sheet and a method of manufacturing a plasma display panel using the same. In particular, a bus electrode green sheet capable of reducing alignment and electrode pattern distortion problems and process times between a black matrix and a bus electrode formed thereon; The present invention relates to a plasma display panel manufacturing method using the same.

Plasma Display Panels (hereinafter referred to as "PDPs") display an image including letters or graphics by emitting phosphors by ultraviolet rays generated when the inert gas is discharged. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development. In particular, the three-electrode AC surface discharge type PDP has advantages of low voltage driving and long life because wall charges are accumulated on the surface during discharge and protect the electrodes from sputtering caused by the discharge.

1A to 1C show a cross-sectional view of an embodiment showing a process of manufacturing a conventional PDP upper plate structure, which will be described below.

First, as shown in FIG. 1A, a transparent electrode is coated on the entire upper substrate 1 and then patterned to form a sustain electrode 2 as a transparent electrode, and a photosensitive black matrix (BM) paste 11 is formed on the structure. ) Is screen printed and dried. Then, the BM mask 6 is spaced apart from each other on the structure, and the BM layer is exposed.

Then, as shown in Figure 1b, after screen printing the electrode paste 12 for forming the bus electrode on the structure and dried, and placed the mask for the bus electrode 7 on the structure spaced apart The bus electrode layer is exposed.

Then, as shown in FIG. 1C, when the structure is developed, the bus electrode layer and the BM layer of the exposed area remain, and the developed structure is fired to expose the partially exposed area and the sustain electrode 2 of the upper substrate 1. A BM 3 is formed on a part of the bus electrode, and a bus electrode 4 is formed in the BM 3 region formed on the sustain electrode 2.

In the conventional PDP upper plate structure formed through the above process, the BM structure is formed differently according to an active area displaying an actual image and a pad area other than the active area. FIG. 2 is a plan view of a conventional PDP upper plate structure. 3 is a cross-sectional view of the part shown in FIG.

As can be seen from the plan view of FIG. 2 and the cross-sectional views of FIG. 3, in the active region a, the BM 3 is formed on a portion of the upper portion of the sustain electrode formed on a portion of the upper substrate and on the upper substrate exposed between the two sustain electrodes. In the pad regions b and c, the BM 3 is formed only in the region where the bus electrode is to be formed on the upper substrate.

As can be seen in the manufacturing process of FIG. 1, since the conventional PDP has to screen-print and dry the BM paste and the bus electrode paste in order to form the BM and the bus electrode, an apparatus for screen printing is needed and undergoes a drying process. do.

In addition, in the conventional PDP, since the BM mask used for exposing the BM paste is only exposed to the active area and is not used to expose the pad area, the BM is not cured before firing. This collapse is more likely to occur.

Accordingly, the present invention has been made to solve the above conventional problems, the bus electrode dry film composed of a two-layer structure of the organic photosensitive layer and the bus electrode layer composed of negative PR photosensitive organic material, and the upper portion of the bus electrode dry film and It is an object of the present invention to provide a bus electrode green sheet capable of forming a bus electrode pattern without a drying process when forming a bus electrode of a PDP, and a plasma display panel manufacturing method using the same by forming a protective film formed under the protective film.

In addition, the present invention by curing the entire BM of the pad area by exposing the entire pad area when forming the BM of the PDP, to solve the alignment problem between the two layers of the pad area, and to eliminate the pattern collapse phenomenon that may occur during pattern development and firing It is an object of the present invention to provide a bus electrode green sheet capable of realizing fine patterns by removing them and a method of manufacturing a plasma display panel using the same.

The bus electrode green sheet of the present invention for achieving the above object is an organic photosensitive layer formed of a photosensitive organic material; A bus electrode dry film having a two-layer structure of a bus electrode layer formed of silver (Ag) powder and an organic material developed by a developer regardless of exposure; Characterized in that the protective film for protecting the bus electrode dry film formed on top and bottom of the bus electrode dry film.

Plasma display panel manufacturing method using the present invention bus electrode green sheet for achieving the above object is a bus composed of a bus electrode dry film having a two-layer structure of the organic photosensitive layer and the bus electrode layer developed by a developer regardless of exposure A method of manufacturing a plasma display panel using an electrode green sheet, the method comprising: forming a sustain electrode on an upper substrate; Laminating the black matrix (BM) dry film including the photosensitive organic material on the structure and exposing the black matrix using a mask for the black matrix; Laminating the bus electrode dry film on the structure, and exposing the bus electrode dry film using a mask for a bus electrode; Developing and firing the structure to form a black matrix and a bus electrode.

In addition, the laminated black matrix (BM) dry film is characterized in that the entire exposure in the pad area, which is an area other than the active area in which the actual image is displayed.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described.

First, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

In addition, many specific details, such as specific processing flows, are set forth in the following description to provide a more general understanding of the invention, but are not limited thereto, and it is understood that the invention may be practiced without these specific details. It will be self-evident to those of ordinary knowledge in Esau.

In general, the PDP is divided into an active region displaying an actual image and a pad region in which a driving voltage is applied and the actual image is not displayed.

Since the active area displays an actual image, two sustain electrodes are formed on the upper plate structure, and the BM and bus electrodes are formed on the sustain electrodes.

On the other hand, since the pad region does not display an image, it is not necessary to configure the sustain electrode, and the BM and the bus electrode are formed on the upper substrate.

The present invention is to reduce the manufacturing cost and reduce the number of processes by manufacturing the PDP using the BM green sheet and the bus electrode green sheet to form the bus electrode and black matrix (BM) without drying process and printing equipment Shall be.

The BM green sheet includes a BM dry film formed of a photosensitive organic material and a powder for BM having a non-conductive blackness, and a protective film for protecting the BM dry film on the upper and lower portions of the BM dry film.

The bus electrode green sheet includes a bus electrode dry film composed of an organic photosensitive layer composed of a photosensitive organic material and a bus electrode layer, and a protective film for protecting the bus electrode dry film on the upper and lower portions of the bus electrode dry film. The bus electrode layer includes Ag powder and an organic material that can be dissolved in a developer during development regardless of exposure.

The photosensitive organic material constituting the BM dry film and the bus electrode dry film has a property that a portion exposed as a negative photosensitive organic material and a negative PR (photoresist) photosensitive organic material is preserved after development, but the present invention is not limited thereto. The BM dry film and the bus electrode dry film may be formed of a positive photosensitive organic material in which no part is left.

In addition, the present invention is to form a high-definition pattern to prevent the pattern distortion phenomenon in the pad area in the shape by forming the BM differently in the active area and the pad area that is other area to display the actual image. Shall be.

In the present invention, the BM formed in the active region is formed on the upper substrate exposed between the upper portion of the sustain electrode and the sustain electrode, while the BM formed in the pad region prevents pattern distortion from the bus electrode formed on the BM. In order to form the whole area. That is, the entire BM formed in the pad region during exposure after the formation of the BM layer is exposed and cured so that all of the BM is formed in the pad region during development.

4 is a plan view of the top plate structure of the PDP according to the present invention, and it can be seen that the structure of the BM 30 formed in the active region where the actual image is displayed is different from that of the BM 30 formed in the pad region. .

FIG. 5 is a plan view of each part shown in FIG. 4, and as can be seen from the plan view of FIG. 5, the active region a is formed between the sustain electrode 2 and the region where the BM 30 is formed with the bus electrode 40. FIG. The pad regions b and c are also formed on the exposed upper substrate 1, and the pad regions b and c are formed not only in the region where the bus electrode 40 is formed but also in other regions.

That is, as can be seen in the cross-sectional view (a) of the cell formed in the active region, the BM 30 is the upper substrate exposed between the upper part of the sustain electrode 2 formed on the upper substrate 1 and the two sustain electrodes 2. It is formed on (1), and as can be seen from the cross sectional views (b, c) of the pad region, the BM 30 is formed on the entire region above the upper substrate 1.

4 and 5, the BM 30 and the bus electrode 40 are formed using a green sheet, and FIG. 6 shows the structure of the BM green sheet (a) and the bus electrode green sheet (b). will be.

As shown in FIG. 6A, the BM green sheet includes a BM dry film 21 and protective films 24 and 25 for protecting the BM dry film 21 above and below the BM dry film 21. do. Here, the BM dry film 21 is composed of a negative photosensitive organic material and a powder for BM having a non-conductive blackness, the BM dry film 21 is only exposed at the time of exposure is cured and developed during development Only parts remain.

As shown in FIG. 6B, the bus electrode green sheet protects the bus electrode dry film formed of two layers of the organic photosensitive layer 23 and the bus electrode layer 22 and the bus electrode dry film on the upper and lower portions of the bus electrode dry film. It consists of a protective film (24, 25) to.

The organic photosensitive layer 23 is formed of a negative PR photosensitive organic material so that only the exposed part remains during exposure by the mask for the bus electrode, and the bus electrode layer 22 is exposed to Ag powder and exposure during development. Irrespective of the organic matter, the organic matter may be dissolved in the developer.

Next, a process of manufacturing a PDP using the BM green sheet and the bus electrode green sheet shown in FIG. 6 will be described with reference to FIG.

First, as shown in FIG. 7A, the transparent electrode ITO is coated on the upper substrate 1, and the sustain electrode 2 is formed through patterning using a pattern mask (not shown) for the sustain electrode.

Then, as shown in FIG. 7B, the BM dry film 21 provided on the BM green sheet on the structure is laminated using a laminator, and the BM mask 6 is spaced apart on the structure. After positioning, UV exposure is performed to cure the negative photosensitive organic material included in the BM dry film 21 of the portion where the BM is to be formed.

Then, as illustrated in FIG. 7C, the bus electrode dry films 22 and 23 provided on the bus electrode green sheet are laminated on the structure using a laminator, and a mask for the bus electrode is formed on the structure. After positioning 7), perform ultraviolet exposure. In this case, only a portion of the negative PR organic photosensitive layer 23 formed on the bus electrode layer 22 of the bus electrode dry film is exposed to the pattern.

Then, as shown in FIG. 7D, the structure is developed through a developer. Only the hardened portions of the bus electrode dry films 22 and 23 and the BM dry film 21 remain, and the uncured portions are the developer. Is developed through. That is, the hardened BM dry film 21 remains only on the upper part of the upper substrate 1 exposed between the upper part of the sustain electrode 2 and the sustain electrode 2, and the BM dry film formed on the sustain electrode 2. The bus electrode dry films 22 and 23 cured only on the upper portion 21 remain. At this time, the bus electrode layer 22 is developed by a pattern by the organic photosensitive layer 23 cured on the bus electrode layer 22 during development by the organic material that can be dissolved by the developer.

Then, as shown in FIG. 7E, the structure is fired to form the BM 30 and the bus electrode 40. Here, since the organic photosensitive layer 23 formed on the bus electrode 40 is made of only organic material, it is completely burned and removed during firing.

Through the above process, the upper plate structure of the active area displaying the actual image on the PDP is formed. In addition, the top plate structure formed in the pad region is different from the process of forming the BM in the manufacturing process of the active region. Of course, no sustain electrode is formed in the pad region.

In other words, after laminating the BM dry film, the BM dry film laminated to the pad area during ultraviolet exposure is not patterned, but is fully exposed and the entire BM dry film laminated to the pad area is completely cured so that the BM dry film is not developed during development. Is formed.

Since the BM of the pad region is formed not only in the bus electrode region but in the entire region, it is possible to prevent a pattern collapse phenomenon that may occur due to the BM layer not being exposed. This is possible.

As described in detail above, the present invention uses a bus electrode dry film composed of a two-layer structure of an organic photosensitive layer and a bus electrode layer composed of a negative PR photosensitive organic material, and a protective film formed on the upper and lower portions of the bus electrode dry film. When forming a bus electrode of the PDP, there is an effect that a bus electrode pattern can be formed without a drying process.

In addition, the present invention by curing the entire BM of the pad area by exposing the entire pad area when forming the BM of the PDP, to solve the alignment problem between the two layers of the pad area, and to eliminate the pattern collapse phenomenon that may occur during pattern development and firing By removing it, there is an effect that can implement a fine pattern.

Claims (5)

An organic photosensitive layer formed of the photosensitive organic material; A bus electrode dry film having a two-layer structure of a bus electrode layer formed of silver (Ag) powder and an organic material developed by a developer regardless of exposure; The bus electrode green sheet, characterized in that the protective film for protecting the bus electrode dry film formed on the upper and lower portions of the bus electrode dry film. The bus electrode green sheet of claim 1, wherein the organic photosensitive layer is formed of a negative photoresist (PR) photosensitive organic material. A plasma display panel manufacturing method using a bus electrode green sheet composed of an organic photosensitive layer and a bus electrode dry film having a two-layer structure of a bus electrode layer developed by a developer regardless of exposure, Forming a sustain electrode on the upper substrate; Laminating the black matrix (BM) dry film including the photosensitive organic material on the structure and exposing the black matrix using a mask for the black matrix; Laminating the bus electrode dry film on the structure, and exposing the bus electrode dry film using a mask for a bus electrode; And developing a black matrix and a bus electrode by developing and firing the structure to form a black matrix and a bus electrode. 4. The method of claim 3, wherein the laminated black matrix (BM) dry film is exposed in the pad area, which is an area other than an active area in which an actual image is displayed. 5. The bus electrode green sheet according to claim 3, wherein the bus electrode layer is patterned by the cured portion of the organic photosensitive layer during exposure, and the cured organic photosensitive layer is removed during firing. Plasma Display Panel Manufacturing Method.

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