JPS60107240A - Manufacture of image display device - Google Patents

Abstract

PURPOSE:To prevent oxidation of electrode structure by heating or displacement of electrodes in the electrode structure by sealing a vacuum case through laser welding between a first metal plate and a second metal plate. CONSTITUTION:A first metal plate 8 having opening 7 is bonded to a case 6 formed by an insulator, for example, glass using a flit glass 9. Here, the flit glass 9 is heated up to 450-500 deg.C for baking. Next, an electrode structure 10 is placed within the case 6 through the opening 7. Next, a second metal plate 11 in the same shape as the opening 7 or in such a shape as forming predetermined clearance between the first metal plate 8 is engaged with the opening 7. A vacuum case 14 can be sealed, for example, by eliminating stepped portion between the first metal plate 8 and the second metal plate 11 by a magnet 12 and laser- welding the first metal plate 8 and the second metal plate 11 with a laser machinery 13.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a method of manufacturing an image display device.

Conventional configuration and its problems Conventionally, in image display devices, the vacuum container is bonded with frit glass, and the entire vacuum container is 460~SOO''.
CK was heated and sealed. Such heating causes problems such as oxidation of the electrode assembly disposed inside the vacuum container and misalignment of each electrode within the electrode assembly due to thermal expansion and contraction.

FIG. 1 shows a cross-sectional view of a conventional image display device.

Here, the terminals and tip tubes around the electrode structure are omitted. The outline of the manufacturing process of the image display device will be explained using the figure.

First, the electrode assembly 2 is placed in a container 1 made of an insulating material, such as glass, and a metal plate 3 is adhered to the container 1 through frit glass 4YC to form a vacuum container 6. In order to fire the frit glass 4, the entire vacuum container 6 is heated to 460 to 500
Finally, the chip tube (not shown) is evacuated to obtain an image display device. In this step, in order to fire the frit glass 4, the entire vacuum container 6 is made of metal of 460~
Heat to 600'CVc. This causes problems such as oxidation of the electrode assembly 2 disposed inside the vacuum container 6 and misalignment of each electrode within the electrode assembly 2 due to thermal expansion and contraction.

OBJECTS OF THE INVENTION The present invention solves all of the above-mentioned conventional problems, and aims to provide a method for manufacturing an image display device that does not cause misalignment of each electrode within the electrode assembly due to oxidation or thermal expansion and contraction of the electrode assembly. purpose.

Structure of the Invention The present invention provides a method for disposing a first metal plate having an opening in the opening of a vacuum vessel, disposing an electrode assembly into the vacuum vessel from the opening of the metal plate, and connecting the opening of the metal plate with the first metal plate having an opening. A second metal plate of the same shape or a shape that completely forms a predetermined gap between the metal plate and the first metal plate; plate and said second
A method for manufacturing an image display device, characterized in that the vacuum container is hermetically sealed by laser welding a metal plate with a metal plate of It is possible to obtain an image display device that does not cause positional displacement of electrodes.

DESCRIPTION OF EMBODIMENTS FIG. 2 a % O is a process diagram showing a method of manufacturing an image display device according to a first embodiment of the present invention. In Figure 2a,
A first metal plate 8 having an opening 7 is bonded to a container 6 made of an insulating material such as glass with a frit glass 9. Here, in order to fire the frit glass 9,
Heating to 500'C Next, in FIG. 2, the electrode assembly 10 is placed into the container 6 through the opening 7. Next, in FIG. 2C, a second metal plate 11 having the same shape as the opening element or a shape that forms a predetermined gap (10 μm to 100 μm) between it and the first metal plate 8 is fitted into the opening 7. Com. The magnet 12 eliminates the level difference between the first metal plate 8 and the second metal plate 11, and laser processing (according to section 13, the first metal plate 8 and the second metal plate 11 are laser welded to form a vacuum vessel. 14 is sealed.

Here, 16 is a laser beam.

Thereafter, a chip tube (not shown) is evacuated to obtain an image display device.

FIGS. 3a to 3d are process diagrams showing a method of manufacturing an image display device according to a second embodiment of the present invention. In Figure 3a,
Container 61C metal plate 1 made of insulator, for example glass
b'((Glue with solid glass 17.Here, in order to fire the frit glass 17, the heating temperature is 460~600°CK
Heat.

Next, in FIG. 3, the metal plate 16 is cut into a first metal plate 18 and a second metal plate 19 by the laser processing machine 13.

Next, in FIG. 3C, the electrode assembly 10 is placed in the container 6 through the opening 2o of the first metal plate 18 formed by laser cutting. Next, in FIG. 3 dVc, the second metal plate 19 or a metal plate (not shown) having a size that corrects the gap caused by laser cutting is fitted into the full opening 20.

The magnet 12 eliminates the level difference between the first metal plate 18 and the second metal plate 19, and the laser processing machine 13 laser welds the first metal plate 18 and the second metal plate 19, thereby forming the vacuum vessel 21. Seal it tightly. Thereafter, the chip tube (not shown) is evacuated to obtain an image display device.

Note that, as shown in FIG. 4, a divided capture metal plate 23 is arranged between the first metal plate 8 and the second metal plate 11 and the electrode assembly 10 so as to fill the gap i22'i. By providing the capture metal plate 23, not only can sparks and spatter generated during laser welding be prevented from entering the container 6, but also the effect of the magnet 12 used as an attraction means can be increased.

Although the magnet 12 is used as the attraction means in the embodiment, it goes without saying that a commercially available attraction means may also be used. Further, in this example, metal plates having a thickness of 0.1 to 0.2M and having a thermal expansion coefficient substantially the same as that of frit glass were used as the first metal plate and the second metal plate.

In addition, as laser processing machines, YAG laser processing machines and C
An O2 laser processing machine is effective.

Furthermore, although the magnet 12 is used as the attraction means in the embodiment, it goes without saying that attraction means using negative pressure may also be used.

Effects of the Invention In the method for manufacturing an image display device of the present invention, the frit glass is fired by heating to 460 to 600"C before placing the electrode assembly in the container, and after placing the electrode assembly in the container, Since it can be sealed without heating, it does not cause oxidation of the electrode structure due to heating or misalignment of each electrode due to thermal expansion and contraction, and its practical effects are great.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional image display device, FIG. 2 is a process diagram showing a method of manufacturing the image display device in the second embodiment, and FIG. 4 is a diagram showing the use of a capture metal plate. 1.6... Container, 2,1o... Electrode structure, 4°9.17... Frit glass, 7.2
0...Opening, 8, 18...First metal plate, 11.19...Second metal plate, 12...
...Magnet, 13...Laser processing machine, 16.
...Laser beam, 23...Capture metal plate. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 4

Claims (1)

[Scope of Claims] (1) A first metal plate having an opening is placed in an opening of a vacuum vessel, an electrode assembly is placed in the vacuum vessel from the opening of the metal plate, and The second hole has the same shape as the opening.
or a second metal plate having a shape that forms a predetermined gap between the metal plate and the first metal plate, the first metal plate and the second metal plate being fitted into the opening of the metal plate; A method of manufacturing an image display device, characterized in that the vacuum container is hermetically sealed by laser welding. (2) The step of arranging a first metal plate having an opening in the opening of the vacuum container includes covering the opening of the vacuum container with a metal plate, and cutting the metal plate with a laser to remove the first metal plate. The fM manufacturing method for an image display device according to claim 1, characterized in that an opening in a plate is obtained. (3) The method for manufacturing an image display device according to claim 1, wherein the first metal plate and the second metal plate are attracted by a magnet during laser welding. (4) A method for manufacturing an image display device according to claim 1, characterized in that the first metal plate and the second metal plate are vacuum-adsorbed during laser welding. (6) Arranging an auxiliary metal plate divided between the first metal plate and the second metal plate and the electrode structure so as to close the gap between the first metal plate and the second metal plate. A method for manufacturing an image display device according to claim 1, characterized in that: