JP2006032314A - Manufacturing method of gas discharge screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method of a front substrate of an AC plasma screen consisting of a simple manufacturing process. <P>SOLUTION: A black-color strip and a bus electrode are molded at one time by combining technical processes of the bus electrode and the black-color strip. In case a screen printing method is used, a bus-electrode pattern and a pattern of the black-color strip are formed on a sheet of screen mask, on which black-colored silver paste is coated, and finally it is molded at one time in the printing. In case a photo etching method is used, the electrode and the black-colored strip are formed on a photo mask, photosensitive black-colored silver paste is printed on a glass plate, and the bus electrode and the black-colored strip are molded at one time by development and exposure. Therefore, not only positioning of the patterns is avoided, but also accuracy of the pattern and picture quality of a plasma panel are improved, and further, a manufacturing process is simplified and manufacturing efficiency is improved to lower a consumption volume of production materials, investment on devices and production cost. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of gas discharge. This technical field includes a method of manufacturing a front substrate for an AC plasma screen.

  All current AC gas discharge screens apply a surface discharge structure and include a front substrate and a back substrate sealed to the front substrate. The transparent electrode ITO and the bus electrode on the front substrate constitute a discharge electrode, and the discharge electrode includes a discharge sustain electrode X and a scan / sustain electrode Y. The surface of the discharge electrode is covered with a dielectric layer, and the dielectric layer is covered with a dielectric protective layer. The rear substrate includes an address electrode, and the address electrode is orthogonal to the discharge electrode and is covered with a dielectric layer. On the dielectric layer is a stripe barrier rib whose bottom is covered with a phosphor layer, and the stripe barrier rib is parallel to the address electrode. The front substrate and the back substrate are connected by a low melting point frit, and the gap between the front substrate and the back substrate is filled with mixed discharge gases Ne, Ar, and Xe.

  The manufacturing process of the front substrate of the gas discharge screen by screen printing in the prior art is as follows.

  1) First, a transparent electrode ITO is formed on a glass plate by photo-etching, a black mask is filled with a screen mask provided with a bus electrode pattern, and the black silver paste is placed on the outside of the transparent electrode ITO through the screen mask. Then, the black silver paste is dried and fired to obtain a bus electrode.

  2) After aligning the pattern, fill the screen mask with the black strip pattern with black silver paste, and apply the black silver paste on the glass plate on which the bus electrode is formed through the screen mask. The paste is dried and baked to burn the organic material inside and form a black strip.

  3) The dielectric layer is printed on the bus electrode and the black strip on the glass plate, dried, the organic material inside is burned, and the manufacture of the front substrate is completed.

  The manufacturing process of the front substrate of the gas discharge screen by photoetching is as follows.

  1) First, a transparent electrode ITO is formed on a glass plate by photoetching.

  2) Photosensitive black silver paste is printed on a glass plate, a continuous film layer is formed, and the film layer on the glass plate is exposed, developed and dried by a photomask plate having a bus electrode pattern in an exposure machine. And firing to obtain a bus electrode.

  3) Photosensitive black silver paste is printed on the glass plate on which the bus electrode is formed, a continuous film layer is formed, and the film layer on the glass plate is formed by a photomask plate having a black strip pattern in the exposure machine. Are aligned, exposed and developed. The photosensitive black silver paste is dried and baked to burn the organic material inside to obtain a black strip.

  4) After the dielectric layer is printed and baked on the glass plate on which the bus electrodes and the black strip are formed, the internal organic material is burned to complete the manufacture of the front substrate.

  When the screen printing method is used in the related art, before forming the black strip pattern, the black strip pattern is printed in the non-discharge region between the sustain discharge electrode X and the scan / sustain discharge electrode Y. The glass plate on which the bus electrode is formed and the screen mask having the black strip pattern must be accurately aligned. When the photoetching method is used, the sustain discharge electrode X and the scan / sustain discharge are exposed after the exposure. Before forming the black strip pattern, a glass plate on which a bus electrode is formed and a photomask having the black strip pattern are formed so that the black strip pattern is formed in the non-discharge region between the electrodes Y. It had to be accurately aligned.

  The order of the length of the gap between the black strip pattern and the bus electrode pattern is on the order of μm, and if the alignment is not sufficiently accurate, it will affect the formation of an effective discharge space, resulting in a light emitting region that does not completely shine, The black strip cannot cover the light generated from the discharge process, or the light emitting area does not absorb the light from the external environment, thereby reducing the light emission efficiency of the screen and degrading the image quality.

  Further, when the screen printing method is used in forming the bus electrode and the black strip, it is necessary to perform printing, drying and baking twice using two different screen masks. Instead, when using a photoetching method, exposure, development, drying, and baking must be performed twice. Therefore, the technical process of forming electrodes and black strips is complex, costly mold materials, screen manufacturing costs are too high, and efficiency is low.

  The object of the present invention is to provide a method of manufacturing a gas discharge screen with a simplified manufacturing process, to reduce equipment investment, reduce waste of raw materials, pattern accuracy, plasma screen image quality, and panel It is to improve luminous efficiency and reduce costs.

  The technical solution of the present invention is implemented as follows.

In the manufacturing method of gas discharge screen by screen printing,
1) First, a transparent electrode is formed on a glass plate by photoetching.

  2) Fill the screen mask with black silver paste, pass the black silver paste through the screen mask, print on the glass plate, and dry and fire the black silver paste printed on the glass plate, inside the black silver paste The organic material is burned to obtain a bus electrode and a black strip. The transparent electrode ITO and the bus electrode constitute a discharge electrode including the sustain discharge electrode X and the scan / sustain discharge electrode Y.

  3) A dielectric layer is printed and baked on the black strip of the glass plate and the bus electrode, and the organic material in the dielectric layer is burned.

  4) An MgO film is formed on the dielectric layer by electron beam evaporation, and a front substrate is prepared.

  5) The front substrate and the rear substrate are sealed, exhausted, and aged to obtain a gas discharge panel.

  In the step of forming the bus electrode and the black strip, a black silver paste is filled on a screen mask having a bus electrode pattern and a black strip pattern at the same time. The black silver paste is passed through a screen mask and printed on the outer edge of the transparent electrode of the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y. The black silver paste is dried and fired, and the internal organic material is burned to obtain a bus electrode and a black strip.

  The temperature for drying the black silver paste is 85 to 95 ° C., the time is 18 to 22 minutes, and when the black silver paste is baked, the temperature is 540 to 560 ° C. in order to burn the organic material in the black silver paste. The time is 25 to 35 minutes, and the height of the bus electrode and the black strip is 3 to 10 μm.

In the manufacturing method of gas discharge screen by photo etching,
1) First, a transparent electrode is formed on a glass plate by photoetching.

  2) A photosensitive black silver paste is printed on a glass plate to form a continuous film layer, and the film layer on the glass plate is exposed and developed by a photomask plate provided with a pattern in an exposure machine. The photosensitive black silver paste is dried and fired, and the internal organic material is burned to obtain a bus electrode and a black strip. The transparent electrode ITO and the bus electrode constitute a discharge electrode including the sustain discharge electrode X and the scan / sustain discharge electrode Y.

  3) Printing a dielectric layer on the black strip of glass plate and bus electrodes, firing the dielectric layer, and burning the organic material in the dielectric layer.

  4) An MgO protective film is formed on the dielectric layer by electron beam evaporation, and a front substrate is prepared.

  5) The front substrate and the rear substrate are sealed, exhausted, and aged to obtain a gas discharge panel.

  In the manufacturing process of the bus electrode and the black strip, a photosensitive black silver paste is printed on a glass plate, a continuous film layer is first formed, and then a photomask plate having a pattern in an exposure machine is used. Expose the top film layer. An electrode pattern and a black strip pattern are copied from the photomask plate to the outer edge of the transparent electrode on the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y, and developed. The photosensitive black silver paste is dried and baked to burn the organic material inside, thereby obtaining a bus electrode and a black strip.

  The temperature for drying the black silver paste is 85 to 95 ° C., the time is 18 to 22 minutes, the temperature for firing the black silver paste is 540 to 560 ° C., and the time is 25 to 35 minutes. Burn organic materials. The height of the bus electrode and the black strip is 3 to 10 μm.

  By combining the manufacturing process of the bus electrode and the black strip, the present invention realizes the molding of the black strip and the bus electrode at a time. When the screen printing method is selected, specifically, a bus electrode pattern and a black strip pattern are formed on a single screen mask and molded at once by screen printing with a black silver paste. When using the photo-etching method, form a pattern of electrodes and black strips on the photomask, apply a photosensitive black silver paste on the glass plate, and mold the bus electrodes and black strips at once by exposure and development. Is realized. This method not only avoids pattern alignment, but also improves pattern formation accuracy and plasma screen image quality, and at the same time simplifies the manufacturing process and improves production efficiency, further reducing waste of raw materials, Reduce equipment investment and production costs.

  The accompanying drawings are specific embodiments of the present invention. The subject matter of the present invention will be further described in combination with the accompanying drawings.

  In the AC gas discharge screen of the present invention (see FIG. 1), a surface discharge structure including a front substrate 1 and a rear substrate 6 connected to the front substrate 1 is used. The front substrate 1 includes a transparent electrode (ITO) 2 and a bus electrode 3.

  Transparent electrode 2 and bus electrode 3 constitute a discharge electrode including sustain discharge electrode X and scan / sustain discharge electrode Y. The surface of the discharge electrode is covered with a dielectric layer 4, and the dielectric layer 4 is covered with a dielectric protective layer 5. The non-discharge area between the sustain discharge electrode x and the scan / sustain discharge electrode Y is covered with the black silver paste 12 on the strip.

  The back substrate 6 includes address electrodes 7, which are perpendicular to the discharge electrodes and are covered with a dielectric layer 11. The dielectric layer 11 includes strip-shaped barrier ribs 9, and the barrier ribs 9 are connected to the address electrodes 7. The bottom of the parallel and strip-shaped barrier rib 9 is covered with the phosphor layer 8. The front substrate and the rear substrate are connected by a low melting point frit, and a mixed discharge gas Ne, Ar, Xe or the like is filled in a gap portion between them.

  In the discharge process of each cell on the gas discharge screen, the discharge is caused by the potential difference between the address electrode and the scan / sustain discharge electrode (the sustain discharge electrode X and the scan / sustain discharge electrode Y constitute a display row on the screen). ), Causing a discharge between the scan / sustain discharge electrode Y and the sustain discharge electrode X to complete the address discharge of the cell. After the address discharge, the address electrode changes to the discharge sustain period. The cell that has accumulated the wall charge remains discharged and the addressed cell on the screen is lit.

In the gas discharge screen manufacturing method by screen printing (see Fig. 2),
1) The glass plate is washed and a transparent electrode is formed on the glass plate by photoetching.

  2) Fill the screen mask with black silver paste, pass the black silver paste through the screen mask, and print on the glass plate. The black silver paste printed on the glass plate is dried and fired, and the organic material in the black silver paste is burned to obtain a bus electrode and a black strip. The transparent electrode and the bus electrode constitute a discharge electrode including sustain discharge electrode X and scan / sustain discharge electrode Y.

  3) Print the dielectric layer on the black strip on the glass plate and the bus electrode, fire the dielectric layer (temperature 560-570 ° C., time 10-15 minutes), and remove the organic material in the dielectric layer Burn.

  4) An MgO protective film is formed on the dielectric layer by electron beam evaporation (thickness 4000 to 7000 mm), and a front substrate is prepared.

  5) The front substrate and the rear substrate are sealed, exhausted, and aged to obtain a gas discharge display panel.

  In the manufacturing process of the bus electrode and the black strip, a black silver paste is filled on a screen mask having a bus electrode pattern and a black strip pattern at the same time, the black silver paste is passed through the screen mask, and the transparent electrode on the glass plate And the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y, and the black silver paste is dried and fired to burn the organic material in the black silver paste, and the bus electrode and black Get a strip.

  The drying temperature for drying the black silver paste is 85 to 95 ° C., the time is 18 to 22 minutes, the baking temperature for baking is 540 to 560 ° C., and the time is 25 to 35 minutes. When the organic material in the black silver paste is burned, bus electrodes and black strips are formed. The height of the bus electrode and the black strip is 3 to 10 μm.

Example 1
When producing a gas discharge screen by the screen printing method, in the case of a 42 inch diagonal display screen, first, a PD-200 glass substrate having a high melting point is prepared and washed. A transparent electrode is formed on a glass plate by a photoetching method, and a bus electrode pattern having a width of 90 μm and a black strip pattern having a width of 170 μm are formed on a screen mask. The distance between the bus electrode and the black strip pattern is 45 μm. Next, a black silver paste is filled on a screen mask having a bus electrode pattern and a black strip pattern (a step of aligning the black strip pattern and the prepared bus electrode pattern can be avoided). Black silver paste is passed through the screen mask and printed on the outer edge of the transparent electrode of the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y. Each black silver paste is dried and fired in a drying furnace and a firing furnace (drying temperature is 90 ° C. for 20 minutes, firing temperature is 550 ° C. for 30 minutes), and the organic material in the black silver paste is burned, Bus electrodes and black strips of about 6 μm height are obtained.

A dielectric layer is then printed on the black strip on the glass plate and the bus electrode. The composition of the dielectric layer and the organic solvent is composed of glass powder PbO.B ₂ O ₃ .SiO ₂ and a resin binder, and the main function of the dielectric layer is a capacity for accumulating charges when using AC. When driving an electrode on a substrate, a wall charge is provided to reduce a driving voltage and provide a function of storing a maintenance state. The dielectric layer is fired (firing temperature is 565 ° C., time is 12 minutes), and the organic material in the dielectric layer is burned.

  In order to prolong the discharge life of the electrode, it is necessary to further form a MgO protective film on the dielectric layer by electron beam evaporation. The MgO protective film is mainly made of MgO, and the main function of the MgO protective film is to insulate the discharge cells from the other parts of the screen and to scan / maintain the sustain discharge electrodes X on the front substrate when the plasma screen is turned on. The electrode part of the discharge electrode Y is made unaffected by ions and protects all materials under the MgO protective film. In addition, the MgO protective film provides high secondary electron emission efficiency and reduces the minimum starting voltage required for generating a gas discharge. The thickness of the MgO protective film is 5500 mm. In this way, a front substrate is prepared. The prepared front substrate and back substrate are sealed, exhausted, and aged to obtain a gas discharge panel.

Example 2
The manufacturing process of Example 2 is the same as that of Example 1.

  The drying temperature when drying the black silver paste in the baking furnace is 85 ° C., the time is 18 minutes, the baking temperature when baking the black silver paste in the baking furnace is 545 ° C., the time is 25 minutes, the black silver paste The organic material inside is burned to obtain bus electrodes and black strips. The height of the bus electrode and the black strip is 4 μm, and the thickness of the MgO protective film is 4000 mm.

Example 3
The manufacturing process of Example 2 is the same as that of Example 1.

  The drying temperature when drying the black silver paste in the drying furnace is 95 ° C., the time is 22 minutes, the baking temperature when baking the black silver paste in the baking furnace is 560 ° C., the time is 35 minutes, the black silver paste The organic material inside is burned to obtain bus electrodes and black strips. The height of the bus electrode and the black silver paste is 10 μm, and the thickness of the MgO protective film is 7000 mm.

In a method of manufacturing a gas discharge screen by a photo etching method (see FIG. 3),
1) The glass plate is washed, and a transparent electrode is formed on the glass plate by a photoetching method.

  2) A photosensitive black silver paste is printed on a glass plate to form a continuous film layer, and the film layer on the glass plate is exposed and developed with a photomask provided with a pattern in an exposure machine. The black silver paste is dried and fired, and the organic material in the black silver paste is burned to obtain a bus electrode and a black strip.

  The transparent electrode and the bus electrode constitute a discharge electrode including sustain discharge electrode X and scan / sustain discharge electrode Y.

  3) Printing a dielectric layer on the bus electrode and black strip of the glass plate, firing the dielectric layer, and burning the organic material in the dielectric layer. The combustion temperature is 560-570 ° C., and the time is 10-15 minutes.

  4) An MgO protective film is formed on the dielectric layer by electron beam evaporation, and a front plate is prepared.

  5) The prepared front plate and back plate are sealed, exhausted, and aged to obtain a gas discharge screen.

  In the manufacturing process of the bus electrode and the black strip, first, a photosensitive black silver paste is printed on a glass plate to form a continuous film layer, and the bus electrode pattern and the black strip pattern are simultaneously provided in the exposure machine. The film layer on the glass plate is exposed with a photomask, and the electrode pattern and black color are transferred from the photomask to the outer edge of the transparent electrode on the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y. The pattern of the strip is copied, further developed, the photosensitive black silver paste is dried and fired, and the organic material in the photosensitive black silver paste is burned to obtain a bus electrode and a black strip.

  The drying temperature is 85 to 95 ° C., the time is 18 to 22 minutes, the firing temperature is 540 to 560 ° C., the time is 25 to 35 minutes, and the height of the bus electrode and the black strip is 3 to 10 μm.

Example 4
When a gas discharge screen is manufactured by the photoetching method, in the case of a display screen having a diagonal size of 50 inches, a high melting point PD-200 glass substrate is prepared, and first, a transparent electrode is formed on the glass plate by photoetching. A photosensitive black silver paste is printed on a glass plate to form a continuous film layer having a height of 15 μm, and the film layer on the glass plate is formed by a photomask having a bus electrode pattern and a black strip pattern simultaneously in an exposure machine. When exposed and irradiated with an ultraviolet lamp, the electrode pattern and black strip pattern are copied from the photomask to the outer edge of the transparent electrode on the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y. And develop further. The photosensitive black silver paste is dried and fired (in a firing furnace), and the organic material in the photosensitive black silver paste is burned to obtain a bus electrode and a black strip.

The drying temperature is 90 ° C., the time is 20 minutes, the firing temperature is 550 ° C., and the time is 30 minutes. The height of the bus electrode and the black strip is 6 μm. A dielectric layer is then printed on the black strip of glass plate and the bus electrodes. The main component of the dielectric layer is made of a glass powder _{PbO · B 2 O 3 · SiO} 2 and the resin binder, the main function of the dielectric layer becomes a capacitor for storing charge when using AC, front substrate When driving the electrodes, the wall charge is provided to reduce the driving voltage and to provide the function of storing the maintenance state. The dielectric layer is fired (firing temperature is 565 ° C., time is 12 minutes), and the organic material in the dielectric layer is burned.

  In order to prolong the discharge life of the electrode, it is necessary to further form a MgO protective film on the dielectric layer by electron beam evaporation. The MgO protective film is mainly made of MgO, and the main function of the MgO protective film is to insulate the discharge cells from the other parts of the screen and to scan / maintain the sustain discharge electrodes X on the front substrate when the plasma screen is turned on. The electrode part of the discharge electrode Y is made unaffected by ions and protects all materials under the MgO protective film. In addition, the MgO protective film provides high secondary electron emission efficiency and reduces the minimum starting voltage required for generating a gas discharge. The thickness of the MgO protective film is 5500 mm. In this way, a front substrate is prepared. The prepared front substrate and back substrate are sealed, exhausted, and aged to obtain a gas discharge panel.

Example 5
The manufacturing process of Example 5 is the same as that of Example 4.

  The drying temperature when drying the black silver paste in the drying furnace is 85 ° C., the time is 18 minutes, the baking temperature when baking the black silver paste in the baking furnace is 545 ° C., the time is 25 minutes, the black silver paste The organic material inside is burned to obtain bus electrodes and black strips. The height of the bus electrode and the black strip is 4 μm, and the thickness of the MgO protective film is 4000 mm.

Example 6
The manufacturing process of Example 6 is the same as that of Example 4.

  The drying temperature when drying the black silver paste in the drying furnace is 95 ° C., the time is 22 minutes, the baking temperature when baking the black silver paste in the baking furnace is 560 ° C., the time is 35 minutes, the black silver paste The organic material inside is burned to obtain bus electrodes and black strips. The height of the bus electrode and the black strip is 10 μm, and the thickness of the MgO protective film is 7000 mm.

  The above method is suitable for use in a manufacturing process of a gas discharge display screen having an arbitrary size.

FIG. 1 is a structural diagram of an AC gas discharge screen. FIG. 2 is a technical flowchart for forming bus electrodes and black strips by screen printing. FIG. 3 is a technical flowchart for forming bus electrodes and black strips by photoetching.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Board | substrate 2 ... Transparent electrode 3 ... Bus electrode 4 ... Dielectric layer 5 ... Dielectric protective layer 6 ... Back substrate

Claims (8)

1) Form a transparent electrode on a glass plate by photoetching,
2) Fill the screen mask with black silver paste, let the black silver paste pass through the screen mask, print on the glass plate, dry and fire the black silver paste printed on the glass plate, black silver paste Burning the organic material inside, obtaining a bus electrode and a black strip, the transparent electrode and the gas electrode constitute the discharge electrode including the sustain discharge electrode X and the scan / sustain discharge electrode Y,
3) printing a dielectric layer on the bus electrode and black strip on the glass plate, firing the dielectric layer, burning the organic material in the dielectric layer;
4) A MgO protective film is formed on the dielectric layer by an electron beam vapor deposition film forming method, and a front substrate is prepared.
5) A method of manufacturing a gas discharge screen by screen printing to obtain a gas discharge screen by sealing, exhausting, and aging the prepared front substrate and rear substrate,
In the manufacturing process of the bus electrode and the black strip, a black silver paste is filled on a screen mask having a bus electrode pattern and a black strip pattern at the same time. The black silver paste printed on the outer edge of the transparent electrode and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y and printed on the glass plate is dried and fired, and the organic material in the black silver paste is removed. Burning to obtain a bus electrode and a black strip. The method for producing a gas discharge screen by screen printing according to claim 1, wherein the drying temperature when drying the black silver paste is 85 to 95 ° C and the time is 18 to 22 minutes. The method for producing a gas discharge screen by screen printing according to claim 1, wherein the firing temperature when firing the organic material in the black silver paste is 540 to 560 ° C and the time is 25 to 35 minutes. 2. The method of manufacturing a gas discharge screen by screen printing according to claim 1, wherein the height of the bus electrode and the black strip is 3 to 10 [mu] m. 1) Form a transparent electrode on a glass plate by photoetching,
2) Photosensitive black silver paste is printed on the glass plate to form a continuous film layer, the film layer on the glass plate is exposed with a photomask having a pattern in the exposure machine, and further developed. The photosensitive black silver paste is dried and fired, and the organic material in the photosensitive black silver paste is burned to obtain a bus electrode and a black strip. The transparent electrode and the bus electrode are scanned with the sustain discharge electrode X. Constituting a discharge electrode including the sustain discharge electrode Y;
3) printing a dielectric layer on the bus electrode and black strip of the glass plate, firing the dielectric layer, burning the organic material in the dielectric layer;
4) An MgO protective film is formed on the dielectric layer by an electron beam vapor deposition film forming method, and a front substrate is prepared.
5) A method of manufacturing a gas discharge screen by photoetching to obtain a gas discharge screen by sealing, exhausting, and aging the prepared front substrate and rear substrate,
In the manufacturing process of the bus electrode and the black strip, a photosensitive black silver paste is printed on a glass plate to form a continuous film layer, and the bus electrode pattern and the black strip pattern are simultaneously provided in the exposure machine. The film layer on the glass plate is exposed with a photomask, and the electrode pattern and black color from the photomask to the outer edge of the transparent electrode on the glass plate and the non-discharge area between the sustain discharge electrode X and the scan / sustain discharge electrode Y The strip pattern is copied, further developed, then the photosensitive black silver paste is dried and baked, and the organic material in the photosensitive black silver paste is burned to obtain a bus electrode and a black strip. Method. 6. The method for producing a gas discharge screen by photoetching according to claim 5, wherein the drying temperature when drying the photosensitive black silver paste is 85 to 95 [deg.] C. and the time is 18 to 22 minutes. 6. The method for producing a gas discharge screen by photoetching according to claim 5, wherein the firing temperature when firing the organic material in the black silver paste is 540 to 560 [deg.] C. and the time is 25 to 35 minutes. 6. The method of manufacturing a gas discharge screen by photoetching according to claim 5, wherein the height of the bus electrode and the black strip is 3 to 10 [mu] m.

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