JP2004200036A - Manufacturing method for plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method for a plasma display panel having dielectric layers which are formed precisely. <P>SOLUTION: The plasma display panel 1 has the first dielectric layer 7 which covers a display electrode 6 consisting of a scanning electrode 4 and a maintaining electrode 5, and the second dielectric layer 12 which covers a data electrode 11. The first dielectric layer 7 and/or the second dielectric layer 12 compose a photosensitive dielectric material film which does not cover terminal portions of the display electrode 6, and/or the data electrode 11 by exposing and developing with a prescribed pattern. Consequently, the plasma display panel is manufactured having the first dielectric layer 7, and/or the second dielectric layer 12 formed precisely and covering no terminal portions of the display electrode 6 and/or the data electrode 11. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a plasma display panel known as a thin and relatively large-screen display device.
[0002]
[Prior art]
2. Description of the Related Art In a plasma display panel (hereinafter, referred to as a PDP), an image is displayed by generating ultraviolet rays by gas discharge and exciting a phosphor with the ultraviolet rays to emit light.
[0003]
Such a plasma display device is capable of high-speed display as compared with a liquid crystal panel, has a wide viewing angle, is easy to increase in size, and has a high display quality because it is a self-luminous type. Recently, flat panel displays have attracted particular attention, and have been used for various purposes as display devices at places where many people gather and display devices for enjoying large-screen images at home.
[0004]
PDPs are roughly classified into two types: an AC type and a DC type in terms of driving, and a discharge type includes a surface discharge type and a counter discharge type. However, manufacturing is accompanied by high definition, large screen and simple structure. At present, a surface discharge type AC PDP having a three-electrode structure is mainly used because of its simplicity. The structure includes a display electrode composed of a scan electrode and a sustain electrode, a front plate having a dielectric layer covering the display electrode, a plurality of data electrodes orthogonal to the display electrode, and a spine having a dielectric layer covering the display electrode. By arranging the face plate to face each other, a discharge cell is formed at the intersection of the display electrode and the data electrode, and a phosphor layer is provided in the discharge cell, so that the phosphor layer can be relatively thick. Since it is possible, it is suitable for color display using a phosphor (for example, see Non-Patent Document 1).
[0005]
[Non-patent document 1]
Co-authored by Hiraki Uchiike and Shigeo Mikoshiba, "All about Plasma Display," published by the Industrial Research Institute, May 1, 1997, p79-p80.
[0006]
[Problems to be solved by the invention]
In the above configuration, the dielectric layer is formed by applying a paste-like dielectric material containing a low-melting glass material powder by screen printing or a die coating method, and then drying and firing. Is
[0007]
Here, for example, at the ends of the display electrode and the data electrode, a terminal portion that is not covered with a dielectric layer for making an electrical connection with a driving device is required. It is necessary to prevent the dielectric layer from covering the terminals by accurately positioning the formation position. However, when the dielectric layer is formed by screen printing or die coating, positioning of the coating is performed. It takes time to accurately perform the process, and it is difficult to efficiently form the dielectric layer.
[0008]
The present invention has been made in view of such circumstances, and has as its object to realize a method for manufacturing a plasma display panel including a dielectric layer formed with high accuracy.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, a plasma display panel of the present invention is a plasma display panel comprising a first dielectric layer covering a display electrode composed of a scan electrode and a sustain electrode, and a second dielectric layer covering a data electrode. In the manufacturing method, the first dielectric layer and / or the second dielectric layer form a film of a photosensitive dielectric material, and are exposed and developed in a predetermined pattern to form a display electrode and / or a data electrode. The terminal portion is not covered.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the invention according to claim 1 of the present invention manufactures a plasma display panel including a first dielectric layer covering a display electrode composed of a scan electrode and a sustain electrode, and a second dielectric layer covering a data electrode. In the method, the first dielectric layer and / or the second dielectric layer form a film of a photosensitive dielectric material, and are exposed and developed in a predetermined pattern to form a terminal of a display electrode and / or a data electrode. This is a method for manufacturing a plasma display panel having a configuration in which no part is covered.
[0011]
According to a second aspect of the present invention, in the first aspect of the invention, the film of the photosensitive dielectric material is transferred from a transfer film.
[0012]
Hereinafter, a method of manufacturing a PDP according to an embodiment of the present invention will be described.
[0013]
FIG. 1 is a cross-sectional perspective view showing a schematic configuration of an image display section of a PDP manufactured by the PDP manufacturing method according to the present embodiment. The front panel 2 of the PDP 1 has a display electrode 6 including a scan electrode 4 and a sustain electrode 5 on a transparent and insulating front substrate 3 such as glass, and a first dielectric layer 7 covering the display electrode 6. Further, a protective layer 8 made of an MgO film is provided to cover the protective layer.
[0014]
The scanning electrode 4 and the sustain electrode 5 have a structure in which, for example, bus electrodes 4b and 5b made of a thin metal material are stacked on the transparent electrodes 4a and 5a in order to secure light transmission and reduce electric resistance.
[0015]
Also, the back plate 9 is composed of a data electrode 11, a dielectric layer 12 covering the data electrode 11, a partition 13 parallel to the data electrode 11, and a dielectric layer 12 on an insulating rear substrate 10 such as glass. And the phosphor layers 14R, 14G, and 14B extending to the surface of the partition wall 13 and the side surface of the partition 13.
[0016]
The front plate 2 and the back plate 9 are opposed to each other with the discharge space 15 interposed therebetween so that the display electrode 6 and the data electrode 11 are orthogonal to each other, and are sealed by a seal material formed on the peripheral portion. The discharge space 15 is filled with at least one rare gas of helium, neon, argon, and xenon as a discharge gas. Discharge space 15 operates as a discharge cell 16.
[0017]
FIG. 2 is a plan view showing a schematic configuration of the front panel 2 of the PDP 1 from which a part of the display electrode 6 and the protective layer 8 are omitted. As shown in FIG. 2, the first dielectric layer 7 does not completely cover the terminal portion 6 a of the display electrode 6 used as an electrical connection portion with the driving device, and does not become inside the sealing material 17. It is necessary to form it with high precision. This is because, when the first dielectric layer 7 is formed, if the terminal portion 6a is covered, conduction cannot be obtained. 6 is exposed, which may result in a withstand voltage failure.
[0018]
As described above, when the first dielectric layer 7 is formed, the shape accuracy and the position accuracy of the region are required. In the case of the embodiment of the present invention, the first dielectric layer 7 is formed of a photosensitive material. After a film of a conductive dielectric material is formed on the front substrate 3, exposure and development are performed in a pattern such that the dielectric material of the terminal portions 6 a is removed. The structure is such that the first dielectric layer 7 is not covered. FIGS. 3A to 3E show a schematic flow of the process. 3A to 3E are schematic cross-sectional views of the front substrate 3 in a plane parallel to the display electrodes 6, and the display electrodes 6 omit the bus electrodes 4b and 5b. As shown in FIG. 3B, a photosensitive dielectric material film 7a is applied to the front substrate 3 on which the display electrodes 6 are formed as shown in FIG. 3A. Here, the photosensitive dielectric material is a paste-like material containing a binder resin, a photosensitive material, and a solvent in a powder of a low-melting glass material. Examples of the application method include screen printing and a die coating method, and a method in which a sheet-shaped photosensitive dielectric layer is attached by transfer or the like. Here, in the case of the present embodiment, as long as it is formed so as not to be at least inside the sealant 17, the film 7a of the photosensitive dielectric material can be accurately patterned by exposure and development performed later. Since it is possible, the positional accuracy for the coating at this time is greatly reduced. Then, as shown in FIG. 3C, a mask 18 having a pattern such that the terminal portions 6a of the display electrodes 6 are not covered with the first dielectric layer is formed on the film 7a of the photosensitive dielectric material. Exposure with ultraviolet light is performed. For example, when the photosensitive dielectric material is a negative type, the portion irradiated with the ultraviolet rays remains, so that the mask 18 has a pattern having an opening 18a. As a result of this exposure step, as shown in FIG. 3D, a non-exposed region 19 is formed in the photosensitive dielectric material film 7a.
[0019]
Thereafter, development is performed using, for example, an aqueous solution containing 0.4 wt% of NaCO ₃ or water, so that the film 7 a of the photosensitive dielectric material is patterned so as not to cover the terminal portions 6 a as shown in FIG. Be converted to Then, in such a state, by firing at a temperature equal to or higher than the softening point of the powder of the low-melting glass material, the first dielectric layer 7 having a pattern that does not cover the terminal portion 6a is completed.
[0020]
As described above, a plasma display panel in which the first dielectric layer 7 is accurately formed can be realized.
[0021]
Further, according to the photolithography, it is possible to pattern the film 7a of the photosensitive dielectric material with high accuracy. When the film 7a of the photosensitive dielectric material is formed on the front substrate 2, at least If it is formed so as not to be inside the sealing material 17, the film 7a of the dielectric material can be accurately patterned by exposure and development performed later, so that the formation of the first dielectric layer 7 can be efficiently performed. It is possible to do. In particular, when the method of forming the photosensitive material film 7a on the front substrate 3 is to transfer the photosensitive dielectric material film formed on the support film, the alignment accuracy is reduced during the transfer. There is no need to perform the transfer, so that the transfer can be performed continuously, and the productivity can be improved.
[0022]
Here, the "support film on which a film of a photosensitive dielectric material is formed" (hereinafter, referred to as a transfer film) is obtained by coating a photosensitive dielectric material on a support film with a roller coater, a blade coater, a curtain coater, or the like. After removing a part or all of the solvent by drying the coating film, a cover film is provided thereon (press bonding).
[0023]
Further, the step of transferring the film of the photosensitive dielectric material from the transfer film to the front substrate 3 is performed so that the film of the photosensitive dielectric material is in contact with the surface of the front substrate 3 after the cover film is peeled off from the transfer film. The transfer films are overlapped, thermocompression-bonded from above the transfer film with a heating roller, and then the support film is peeled off. Such an operation can be performed by a laminator device.
[0024]
In the above description, the first dielectric layer 7 of the front panel 2 has been described as an example, but the same can be said for the second dielectric layer 12 covering the data electrodes 11 of the rear panel 9.
[0025]
The present invention also relates to a case where the first dielectric layer 7 and / or the second dielectric layer 12 has a multilayer structure in which a film of a photosensitive dielectric material is laminated, or a case where the first dielectric layer 7 and / or the second The dielectric layer 12 has a multilayer structure in which a film of a dielectric material is laminated, and the first layer has photosensitivity. After the film is formed, it is exposed and developed in a predetermined pattern so that the terminal portion is not covered. In this way, by conducting patterning so as not to be inside the sealing material, the conduction of the terminal portion and the withstand voltage in the discharge space 15 are ensured, and the second and subsequent layers are made of a non-photosensitive dielectric material. This also includes the case where a structure in which the first dielectric layer is applied and formed with such an accuracy that the first dielectric layer does not protrude is obtained.
[0026]
【The invention's effect】
As described above, according to the present invention, it is possible to realize a method of manufacturing a plasma display panel including a dielectric layer formed with high accuracy.
[Brief description of the drawings]
FIG. 1 is a cross-sectional perspective view showing a schematic configuration of an image display area of a plasma display panel manufactured according to an embodiment of the present invention. FIG. 2 is a front view of a plasma display panel manufactured according to an embodiment of the present invention. FIG. 3 is a plan view showing a schematic configuration. FIG. 3 is a diagram showing a schematic flow of steps of a method of manufacturing a plasma display panel according to an embodiment of the present invention.
2 front plate 3 front substrate 4 scan electrode 5 sustain electrode 6 display electrode 7 first dielectric layer 9 back plate 10 rear substrate 11 data electrode 12 second dielectric layer

Claims (2)

A method for manufacturing a plasma display panel, comprising: a first dielectric layer covering a display electrode composed of a scan electrode and a sustain electrode; and a second dielectric layer covering a data electrode, wherein the first dielectric layer and / or the second dielectric layer cover a data electrode. A method for manufacturing a plasma display panel, wherein a bi-dielectric layer is formed by forming a film of a photosensitive dielectric material, and exposing and developing in a predetermined pattern so as not to cover terminal portions of display electrodes and / or data electrodes. 2. The method according to claim 1, wherein the film of the photosensitive dielectric material is transferred from a transfer film.

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