JPH11195375A - Manufacture of plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high precision plasma display panel by forming a dielectric layer of a double layer structure. SOLUTION: In a manufacturing process for a plasma display panel provided with ribs 29 to part discharge space between dielectric layers 27a, 27b covering plural electrodes on a substrate 21 positioned on the back surface side of a pair of mutually facing substrates and a substrate, a first dielectric layer including white pigment, and a second dielectric layer that is transparent to cover the first dielectric layer are formed on the back substrate 21, specified rib pattern cavities are decided by photosensitive resist film on the laminated dielectric layers, rib material is filled in the rib pattern cavities, and the resist film is eliminated, thereby the ribs 29 are formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plasma display panel having ribs (partitions) separating a discharge space between a pair of opposing substrates, and more particularly to a method for providing a reflection function on a rear substrate. The present invention relates to a rib forming method suitable for forming ribs serving as partitions of discharge spaces (between cells) on the white dielectric layer in a panel configuration having the white dielectric layer.

[0002]

2. Description of the Related Art Plasma display panels (hereinafter referred to as P
Called DP. ) Is a display device in which a pair of substrates are arranged facing each other with a small interval therebetween, and a discharge space is formed inside by sealing the periphery. The display device is thin, easy to color, and large in area. It is a self-luminous type and has excellent visibility. Inside, band-shaped ribs for dividing the discharge space into three color phosphors are formed at equal intervals on the rear substrate, and a phosphor layer is disposed between the ribs.

[0003] A conventional PDP will be described using an example of an AC PDP of a three-electrode surface discharge type capable of full color display. FIG. 3 is an exploded perspective view of the PDP of the present invention, and shows a structure of a portion corresponding to one pixel (pixel) EG. The PDP includes a front glass substrate 11 and a back glass substrate 21. The first and second display electrodes X and Y forming a pair, the dielectric layer 17 and the protective film 18 are formed on the front glass substrate 11. On the rear glass substrate 21, an address electrode A, a dielectric layer 27, a rib 29, phosphor layers 28R (for red), 28G (for green), and 28B (for blue) are formed. The dielectric layer 27 is laminated on the rear glass substrate 21 and the address electrodes A. Further, a discharge gas is sealed in a discharge space 30 between the front glass substrate 11 and the rear glass substrate 21.

Each of the display electrodes X and Y has a wide transparent electrode 4
1 and a narrow metal electrode (bus electrode) 4 to supplement its conductivity
It consists of two. When a predetermined voltage is applied to the display electrodes X and Y, a surface discharge occurs along the surface of the dielectric layer 17, and the phosphor layers 28R and 28R,
28G and 28B are excited to emit light.

The address electrode A is a column-directional electrode for generating a discharge between the intersections with the display electrode Y to control the wall charges of the dielectric layer 17 for each sub-pixel. Rib 29
Are stripe-shaped in plan view (when viewed in a plan view), and are arranged at regular intervals along the extension direction of the display electrodes X and Y (the row direction of the display screen). These ribs 2
9, the discharge space 30 is partitioned in the row direction for each unit display element (sub-pixel) EU, and the interval dimension of the discharge space 30 is made uniform over the entire display area.

The dielectric layer 27 and the rib 29 (partition) are formed through the following forming steps. First, the dielectric layer 27 is formed using a white pigment such as TiO ₂ in order to provide a reflection function and achieve high luminance. Then, in the rib forming process,
Conventionally, a method of applying a glass paste by a screen printing method and then firing is generally used,
In this method, it is difficult to reduce the width of the rib, and it is not possible to attain high definition of the display. Therefore, as an alternative to the screen printing method, an embedded rib method has been proposed, and the rib is formed by this method. In this method, a pattern is formed using a dry film or the like in a region other than the rib formation location, the rib material is applied to the entire surface of the substrate, the rib material is dried, and then the top of the rib is polished or the like. And removing the dry film to obtain a desired rib pattern.

[0007]

However, in the above-described method for forming the dielectric layer and forming the ribs, the white pigment added to the dielectric layer on the back side for the purpose of increasing the luminance is used to form the white pigment. When the ribs are formed by the buried rib method, the resist film forming the rib pattern is firmly adhered to the rough surface of the dielectric layer, resulting in peeling. In this case, physical stress acts strongly, and the rib pattern peels off together with the dielectric layer containing the white pigment, which causes a problem that an appropriate rib is not formed in a part or the whole area of the rear substrate. .

Accordingly, the present invention is directed to solving such a problem. Specifically, a dielectric material containing a white pigment is formed on a dielectric layer containing a white pigment. After optimizing the smoothness of the layer surface, the embedded rib method
It is an object of the present invention to provide a method of manufacturing a plasma display panel in which appropriate ribs are formed.

[0009]

According to the present invention, there is provided a discharge space between a substrate and a dielectric layer covering a plurality of electrodes on a substrate located on the back side of a pair of opposed substrates. In a manufacturing process of a plasma display panel having ribs separating the first and second dielectric layers, a first dielectric layer containing a white pigment and a transparent second dielectric layer covering the first dielectric layer are formed on the rear substrate. After the formation, a predetermined rib pattern space is determined in the photosensitive resist film, a rib material is buried in the rib pattern space, and a predetermined rib is formed through a step of removing the resist film. This is achieved by providing a method for manufacturing a plasma display panel.

[0010]

According to the present invention, in the dielectric layer forming step, Ti
A first dielectric layer containing a white pigment such as O ₂ and made of a low melting point glass paste such as a PbO-based or ZnO-based material is formed.
The second dielectric layer is formed using a rib material such as a low-melting glass paste such as a ZnO-based or ZnO-based paste, and the dielectric layer is formed into a two-layer structure. The ribs can be accurately formed without causing peeling of the PDP, and a PDP panel compatible with high luminance and high definition can be provided.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the technical scope of the present invention is not limited to the embodiment.
FIG. 1 is a partial sectional view showing a configuration of a main part of a PDP according to the present invention. PDP1 is a surface discharge type PD having a three-electrode structure.
FIG. 4 is a partial cross-sectional view of P on the rear glass substrate side. 21 is
It shows a glass substrate on the back side, on which address electrodes for selectively emitting light in a unit light emitting region are arranged so as to be orthogonal to the display electrodes X and Y on the glass substrate side. A dielectric layer is provided so as to cover the inner surface on the back side including the upper surface of the address electrode A, and a rib (barrier) for dividing a discharge space is formed thereon.

The PDP 1 has a structural difference from the PDP 10 of FIG. 4 in that the dielectric layer 27 on the glass substrate 21 on the rear side has a two-layer structure. Hereinafter, a method of manufacturing the PDP 1 will be described with a focus on the step of forming the dielectric layer 27 and the step of forming the rib (partition) 29. FIG. 2 is a schematic cross-sectional process drawing showing a method for manufacturing a PDP of the present invention.

First, as shown in FIG.
A dielectric layer material, such as a PbO-based or ZnO-based low-melting glass paste containing a white pigment of TiO ₂ , is applied on the glass substrate 21 provided with, using a screen printing method or another thick film method. , To be deposited. Then, the substrate is carried into a drying oven and dried, and the formation of the first dielectric layer containing the white pigment is completed. Then, as shown in FIG. 2B, a dielectric such as a PbO-based or ZnO-based low-melting glass paste containing no white pigment is formed on the first dielectric layer 27a containing the white pigment. Applying the layer material, also using a screen printing method or another thick film method,
Deposit. After that, the substrate is carried into a drying oven and dried, and the formation of the second dielectric layer containing no white pigment is completed. After that, the substrate is transferred to a firing furnace and fired at a predetermined temperature for about 1 to 2 hours. Through this step, the vitrification of the two layers, that is, the layer 27a containing the white pigment and the layer 27b not containing the white pigment is simultaneously performed, and the dielectric layer as shown in FIG. 2C is completed.

After the printing and baking are completed, the substrate on which the dielectric layer 27 is completed further enters a rib 29 (partition) forming step.
As shown in FIG. 2D, first, a rib forming pattern R1 is formed in a region other than the portion where the rib 29 is formed by using a photosensitive dry film or the like. The rib forming pattern formed by this dry film is formed by, for example, applying a dry film resist, exposing the film, and performing development.

After forming the pattern R1, as shown in FIG. 2E, a rib material made of, for example, a low-melting glass paste is buried in the space R2 of the pattern, and then put into a drying furnace to form a rib material. Allow to dry. And FIG.
As shown in FIG. 2F, the rib material is polished, and as shown in FIG. 2G, the dry film which is the rib forming pattern is peeled off and removed to form a two-layer dielectric. The layer 27 and the rib 29 are completed.

In order to explain the manufacturing process of the present invention, an example of a manufacturing process for forming a dielectric layer by a printing technique has been described as an example, but the present invention is not limited to this technique alone. For example,
Further, by a screen printing method, a dielectric material containing a white pigment is printed and deposited, dried, and baked to complete a dielectric layer containing a white pigment. It is also possible to use a method of printing, depositing, drying, and baking to complete a dielectric layer containing no white pigment, and this technique also has a two-layer structure corresponding to high definition. It is possible to complete the dielectric layer.

By forming the dielectric layer having a two-layer structure of a dielectric layer containing a white pigment and a layer not containing a white pigment through the above-described steps, a rib pattern can be accurately formed. It is possible to cope with high definition and large size of the panel.

[0018]

As described above, according to the present invention, it is possible to solve the problem of rib peeling in the rib forming step accompanying higher luminance. In other words, by forming a dielectric layer having a two-layer structure of a dielectric layer containing a white pigment and a transparent layer, it is possible to accurately form a rib pattern, and to improve the definition and size of the panel. Response is possible.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing a configuration of a main part of a PDP according to the present invention.

FIG. 2 is a schematic cross-sectional process drawing showing a method for manufacturing a PDP of the present invention.

FIG. 3 is a schematic perspective view of a PDP of the present invention.

FIG. 4 is a partial sectional view showing a structure of a main part of a conventional PDP.

[Explanation of symbols]

 REFERENCE SIGNS LIST 11 front glass substrate 17 dielectric layer 18 insulating layer 21 rear glass substrate 27 dielectric layer 28 phosphor 29 rib (partition wall) 30 discharge space 41 transparent electrode 42 bus electrode A address electrode X, Y display electrode

Claims (1)

[Claims] In a manufacturing process of a plasma display panel, a dielectric layer covering a plurality of electrodes and a rib separating a discharge space between the substrates are provided on a substrate located on a back side of a pair of substrates facing each other. After forming a first dielectric layer containing a white pigment and a transparent second dielectric layer covering the first dielectric layer on the back substrate, a photosensitive resist film is formed on the laminated dielectric layer. After a predetermined rib pattern space is determined in step (a), a rib material is buried in the rib pattern space, and a predetermined rib is formed through a step of removing the resist film, thereby manufacturing a plasma display panel. Method.