JPS61121234A - Manufacture of anode - Google Patents

Abstract

PURPOSE:To eliminate the coating of silver paste and drying process as the post process, simplify the manufacturing process and thereby obtained a long life picture display apparatus by providing a process for forming a transparent conductive film before the process for forming stripes. CONSTITUTION:Electron beam is generated from an electron beam generating apparatus 17, an oxide tablet 14 is irradiated with electron beam, it is vacuum deposited on the opposite glass plate 1 and thereby L-shaped transparent conductive film 6 is formed. Thereafter, the black stripes and stripes of phosphor materials of R, G, B are alternately formed on the surface of glass plate except for the plate on which vacuum deposition is carried out by the exposing method. Thereby, coating of silver paste and drying process as the post process can be curtailed and manufacturing process can be simplified. Moreover, since the silver paste which is the gas release source at the anode surface can be curtailed, operation life of picture display apparatus can be extended.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing an anode used in a flat panel image display device in the field of video information equipment.

Conventional Structure and Its Problems In the conventional method of manufacturing an anode for an image display device, as shown in FIG. 1, a fluorescent surface 2 is formed on an anode glass plate 1. Since the electron beam hitting the fluorescent surface 2 is under high pressure of several tens of KV, it is fired for 450"C x 1 hour by the crystalline frit 3 and completely flows into the fixed anode terminal 4 without discharging in the middle. In order to do this, apply an L-shaped silver paste 6 on the anode glass plate 1 after removing it from the fluorescent surface 2, connect it to the anode terminal 4, and then bake it at 450"C x 1h.
The total electron beam current hitting the fluorescent surface 2 t anode terminal 4
It is necessary to release the silver paste to the outside of the image display device, and since the silver paste is coated and fired during the anode manufacturing process, there is a problem in that it requires one more man-hour. In addition, the fluorescent surface 2 is
The temperature becomes extremely high as the entire electron beam flow accelerated at a high pressure of several tens of Kv hits, and methane, -
There is a problem in that gases such as carbon oxide and carbon dioxide are released, which reduces the overall emission/reduction/performance of the cathode in the image display device and shortens the life of the display device. FIG. 2 shows the specific structure of the anode glass shown in FIG. 1. On one surface of the anode glass plate, a Sibrax drive 2&, a phosphor R stripe 2b, and a phosphor G are formed by an exposure method. After forming stripes 2C and phosphor B stripes 2al alternately, lacquer liquid 2e is applied by spraying and dried, and aluminum is further vapor-deposited to form the entire metal back surface 2f and the anode glass plate 1 surface. Manufactured.

OBJECTS OF THE INVENTION The present invention eliminates all of the above-mentioned conventional drawbacks, simplifies the manufacturing method, and at the same time provides an image display device with a long life.

Structure of the Invention The present invention is characterized in that a mixture of indium oxide and tin oxide iL is applied to the surface of a flat glass plate before the step of forming a black stripe and each stripe of phosphors R, G, and B by an exposure method.
By providing the step of forming a transparent conductive film by L-shaped vapor deposition, the subsequent step of applying and drying the silver paste can be omitted and the manufacturing process can be simplified. Furthermore, since the amount of silver paste, which is a source of gas emission on the anode surface, can be reduced, this is extremely advantageous in terms of the life of the image display device.

, Description of Embodiment An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. FIG. 3 shows a state in which a transparent conductive film is formed in an example of the present invention.

In FIG. 3, 1 is a flat glass plate cleaned by ultrasonic cleaning, and 6 is a transparent conductive film formed by depositing a mixture of indium oxide and tin oxide in an iLL shape. Next, the process of forming the L-shaped transparent conductive film will be explained based on FIG.

In FIG. 4, 7 is a rotor pump 8 and a diffusion pump 9.
The vapor deposition tank is evacuated to a degree of vacuum of 3×10 torr, and the flat glass plate 1 is placed in a masking metal fitting 1o.
is set by the fixing jig 11, and the heater 12 is used to heat the flat glass plate 1 from the back side.
Heated to ~360°C. On the other hand, copper crucible 13
Inside, there is a tablet 14 which has been compression-molded in advance by a hot press method, which is a mixture of indium oxide and tin oxide. After confirming with the vacuum gauge 16 that the torr has decreased, the electron beam generator 17
An electron beam is generated from the oxide tablet, and the oxide tablet is evaporated onto the glass plate 1 facing the oxide tablet to form an L-shaped transparent conductive film. Thereafter, black stripes and stripes of phosphor R, G, and H are alternately formed by an exposure method on the surface of the glass plate other than the one on which the vapor deposition was performed, and then a lacquer liquid is sprayed onto the stripe surface. Dry to form a lacquer film. Aluminum is deposited on the surface of the lacquer film to form a metal back film. Then, as shown in FIG.
After removing the metal bank film 2ff at the intersection, the anode terminal 4 is fired and fixed by a crystalline frit 3 for 450'CX1h, and at the same time, the anode itself is fired to produce an anode. This manufacturing method eliminates a large amount of manual labor and also significantly increases reliability.

Effects of the Invention As described above, in the present invention, by using the electron beam evaporation method, the electron beams hitting the fluorescent surface of the anode are all collected by the iL-shaped transparent conductive film, guided to the anode terminal, and finally sent to the outside of the image display device. Escape, the number 10 in the image display device
Discharge that occurs when KV is applied can be eliminated.

At the same time, since the silver paste, which is a source of gas emission, can be eliminated, a decrease in cathode emission of the image display device can be largely prevented, and the life of the image display device can be extended.

[Brief explanation of drawings]

FIG. 1 is a front view of a conventional anode, FIG. 2 is a cross-sectional view of the fluorescent surface of the anode, FIG. 3 is a front view after forming an L-shaped transparent conductive film in the present invention, and FIG. 4 is a front view of the present invention. FIG. 5 is an explanatory diagram of an apparatus for forming an L-shaped transparent conductive film in FIG. 1... Flat glass plate, 4... Anode terminal, 5 Silver paste, 6... Transparent conductive film. Names of 9 substitutes Patent attorney Toshio Nakao and 1 other person Figure 1 Figure 2? 4 262c? ct Figure 3 Figure 4

Claims (1)

[Claims] A first step of vapor depositing a mixture of indium oxide and tin oxide in an L shape on the surface of a flat glass plate to form a transparent conductive film, and forming a black stripe by an exposure method on the surface of the glass plate other than the one on which the vapor deposition was performed. a second step of forming each stripe of phosphors R, G, and B, a third step of applying and drying a lacquer liquid on the stripe surface, and depositing aluminum on the lacquer film surface to form a metal back. A fourth step of forming a film, and after removing the metal back film at the intersection of the L-shaped transparent conductive film, a fifth step in which the anode terminal is connected to the L-shaped transparent conductive film with a crystalline frit. A method for producing an anode, which comprises the steps of: