JPH08190858A - Mask electrode manufacturing method - Google Patents

Abstract

PURPOSE: To prevent the wrinkling of a mask electrode plate consisting of an extremely thin metal plate in the manufacture of a mask electrode, and improve the productivity. CONSTITUTION: A mask electrode plate 2 is placed and positioned on a frame 1, a magnet 8 is brought into contact with or close to the lower part of the frame to closely adhere the mask electrode plate 2 to the frame 1 by the magnetic force of the magnet 8. Therefore, a laser beam is emitted from above the mask electrode plate 2 to connect the mask electrode 2 to the frame 1 in non-contact.

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 color selection electrode of a cathode ray tube, and more particularly to a bonding method for bonding a mask electrode plate to a frame.

[0002]

2. Description of the Related Art In recent years, downsizing of computers has progressed, and demands for smaller and thinner displays have been increasing year by year. Therefore, there is an increasing demand for a mask electrode type monitor as one method capable of making the display thinner. Hereinafter, an example of a conventional method for manufacturing a mask electrode will be described with reference to the drawings.

FIG. 5 shows an outline of a conventional mask electrode manufacturing apparatus. Reference numeral 21 is a box-shaped frame, 22 is a mask electrode plate having many holes, and 23 is a frame 21 and a mask electrode plate 22.
And 24 are resistance welding machines, 25 is a resistance welding electrode, and 26 is a robot for moving the resistance welding electrode 25.

A method of manufacturing a mask electrode using the above mask electrode manufacturing apparatus will be described below. First, the frame
21 is set on the stage 23, and the mask electrode plate 22 is placed thereon.
Is placed.

Next, the mask electrode plate 22 and the frame 21 are positioned, and the mask electrode plate 22 and the frame 21 are sandwiched by the resistance welding electrodes 25 to perform resistance welding. Resistance welding frame
It is performed along the entire circumference of 21.

[0006]

However, in the manufacturing method by resistance welding as described above, since the mask electrode plate 22 is made of a very thin metal plate, the mask electrode plate is pressed by the resistance welding electrode 25. 22 may be deformed.
Further, in resistance welding, the tip of the electrode is abraded by welding at about 1000 points, so that maintenance is required to sharpen the tip of the electrode each time the mask electrode plate 22 is attached to the frame 21. In addition, since the mask electrode plate 22 itself is very thin, it is likely to have wrinkles due to expansion due to welding heat. Therefore,
In consideration of the expansion of the mask electrode plate 22 due to heat in advance, the mask electrode plate 22 is pretensioned in the pulling direction,
Care was taken so that wrinkles would not occur even if the expansion of 22 occurred.

However, in order to apply tension to the mask electrode plate 22 so as not to cause wrinkles and fix the frame 21 and the mask electrode plate 22 to each other, it is necessary to consider that the mask electrode plate 22 is not peeled off by the tension. . In addition, it is necessary to increase the number of welding points in order to secure the welding strength, which causes a problem that productivity cannot be improved.

The present invention has been made in view of the above problems of the prior art.
An object of the present invention is to provide a method for manufacturing a mask electrode, which is capable of improving productivity without wrinkling in the mask electrode plate.

[0009]

In order to achieve the above object, in the method of manufacturing a mask electrode of the present invention, first, (1) a mask electrode plate is placed and positioned on a frame, and A magnet is brought into contact with or close to the mask electrode plate to bring the mask electrode plate into close contact with the frame by magnetic force of the magnet, and then the mask electrode plate is irradiated with laser light to bond the mask electrode plate and the frame. Is.

(2) The mask electrode plate is placed and positioned on a pre-magnetized frame, the mask electrode plate is brought into close contact with the frame by the magnetic force of the frame, and then the laser beam is applied from above the mask electrode plate. The mask electrode plate and the frame are bonded to each other by irradiating with.

Further, (3) after placing the mask electrode plate on the frame for positioning, pressing the mask electrode plate with a laser transmitting plate that transmits the laser beam to bring the mask electrode plate into close contact with the frame. It is characterized in that the mask electrode plate and the frame are joined by irradiating the laser beam from above the laser transmitting plate.

[0012]

[Operation] In any of the above methods (1), (2), and (3), the mask electrode plate cannot be pressed against the frame by an unreasonable force or a local force such as pressing by the conventional welding electrode. Since the mask electrode plate and the frame are brought into close contact with each other with a uniform force, the mask electrode plate is not wrinkled. Further, since it is not necessary to repeat the pressurizing operation for each welding point, the welding work can be speeded up and the productivity is improved.

[0013]

Embodiments will be described in detail below with reference to the drawings. FIG. 1 shows an outline of a mask electrode manufacturing apparatus used in the mask electrode manufacturing method of the present invention. Reference numeral 1 is a box-shaped frame, 2 is a mask electrode plate having many holes, and 3 is a frame 1. A stage for positioning and fixing the mask electrode plate 2, 4 is a YAG laser device, 5 is an optical fiber for sending the laser light generated from the YAG laser device 4, and 6 is a lens for condensing the laser light sent by the optical fiber 5. unit,
A robot 7 supports and moves the lens unit 6.

FIG. 2 shows a mask electrode manufacturing method according to the first embodiment of the present invention, in which the same reference numerals as those in FIG. 1 indicate the same parts, and 8 indicates the direction of arrow A. It is a magnetized magnet.

First, the frame 1 is placed on the stage 3,
The mask electrode plate 2 is placed on the frame 1. At this time, the magnet 8 is placed at a position apart from the mask electrode plate 2 and the frame 1, and the magnetic force of the magnet 8 is at a position where the frame 1 and the mask electrode plate 2 are not affected. Next, the mask electrode plate 2 is positioned with respect to the frame 1, and when the positioning is completed, the magnet 8 is brought into contact with the frame 1 and the magnetic force of the magnet 8 brings the mask electrode plate 2 into close contact with the frame 1.

In the above description, a permanent magnet is used as the magnet 8 so that the magnet 8 is separated from or brought into contact with the frame 1, but an electromagnet is used as the magnet 8 and the electromagnet is brought into contact with the frame 1. As it is, the current may be turned on or off to generate or stop the magnetic force.

Next, laser light is intermittently emitted from the YAG laser device 4, condensed by the lens unit 6 through the optical fiber 5, and the joining portion between the mask electrode plate 2 and the frame 1 is irradiated with laser light and welded. To do. This welding is performed on the entire circumference of the frame by moving the robot 7 supporting the lens unit 6 along the peripheral edge of the frame 1.

The welding of the frame 1 and the mask electrode plate 2 is completed as described above. After that, the magnet is separated from the frame 1 to eliminate the magnetic force to the frame 1 and the mask electrode plate 2, and the frame 1 is taken out from the stage 3. And all the work is completed.

As described above, according to this embodiment, the magnetic force of the magnet 8 is used to bring the frame 1 and the mask electrode plate 2 into close contact with each other.
Moreover, by adopting welding by laser light, the mask electrode plate 2 and the frame 1 can be joined in a non-contact manner, and an unreasonable force or a local force is applied to the mask electrode plate 2 during welding. It will not cause damage. Also,
Since the work of pressing the mask electrode plate 2 against the frame 1 by the resistance welding electrode for each welding point unlike the conventional resistance welding is eliminated, the work time is increased. In addition, maintenance of electrodes such as resistance welding is not required, and productivity can be improved. Further, even if the frame 1 is undulating, the frame 1 and the mask electrode plate 2 are easily brought into close contact with each other, and stable bonding is obtained.

FIG. 3 shows a mask electrode manufacturing method according to the second embodiment of the present invention. Here, in order to bring the frame and the mask electrode plate into close contact with each other, another magnet or electromagnet is not used, but a magnetized frame 9 in which the frame itself is magnetized in advance is used. The magnetizing frame 9 is magnetized in the direction of arrow B.

When the mask electrode plate 2 is bonded to the magnetizing frame 9, the magnetizing frame 9 is first placed on the stage 3 and then the mask electrode plate 2 is placed on the magnetizing frame 9 to position them. Since the magnetizing frame 9 is magnetized, the mask electrode plate 2 and the magnetizing frame 9 are at this point.
Closely adheres to. Next, as in the first embodiment, the robot 7 intermittently emits laser light while moving the lens unit 6 to weld the mask electrode plate 2 and the magnetizing frame 9 over the entire circumference.

The same effect can be obtained by pre-magnetizing the mask electrode plate 2 instead of pre-magnetizing the frame.

As described above, the mask electrode plate 2 and the magnetizing frame 9
However, if left as it is, magnetism remains in the magnetizing frame 9, which adversely affects the performance of the color selection electrode. However, conventionally, in a subsequent step, a step of heating the frame to which the mask electrode plates are joined to the Curie temperature is adopted in order to remove the magnetism remaining in the mask electrode plates in advance. Therefore, in that process, the magnetism remaining in the magnetizing frame 9 is removed, and even if magnetism remains in the magnetizing frame 9 immediately after the mask electrode plate 2 is welded to the magnetizing frame 9, there is a problem. Don't

As described above, also in this embodiment using the magnetizing frame, the mask electrode plate 2 and the magnetizing frame 9 can be welded in a non-contact manner, and the same effect as in the first embodiment can be obtained. To be

FIG. 4 shows a mask electrode manufacturing method according to the third embodiment of the present invention. In this embodiment, after the mask electrode plate 2 is placed on the frame 1 and aligned, the mask electrode plate 2 is pressed from above the mask electrode plate 2 by the laser transmission plate 10 which transmits the laser light to frame the mask electrode plate 2. It is closely attached to 1. The laser transmission plate 10 is made of the same material as the protection plate that protects the lens that focuses the laser light.

When bonding the mask electrode plate 2 to the frame 1, first, the frame 1 is placed on the stage 3, the mask electrode plate 2 is placed on the frame 1 and positioned, and then the laser beam is placed on the mask electrode plate 2. Place the transmission plate 10. At this point, the mask electrode plate 2 is in close contact with the frame 1 due to the weight of the laser transmission plate 10. Next, similarly to the first embodiment, the robot 7 intermittently emits laser light while moving the lens unit 6, and the mask electrode plate 2 and the frame 1 are welded over the entire circumference. Laser welding plate 10 after welding is completed
Get rid of.

As described above, according to this embodiment, the same effect as that of the first embodiment can be obtained, and the mask electrode plate 2 and the frame 1 are welded under the laser transmission plate 10. Further, it is possible to prevent the spatter from scattering from the welded portion, and to prevent the spatter from adversely affecting the mask electrode plate 2.

In each of the above embodiments, if the laser irradiation conditions are such that the pulse width is 2 msec, the input voltage is 500 V, and the output energy is 2 J / P, there is no spattering and a sufficient bond strength is obtained. Was given.

[0029]

As described above, according to the present invention,
(1) Place the mask electrode plate on the frame to position it, and place the magnet under the frame to bring the mask electrode plate into close contact with the frame by the magnetic force of the magnet. (2) Pre-magnetize The mask electrode plate is placed and positioned on the frame, and the mask electrode plate is brought into close contact with the frame by the magnetic force of the frame. (3) The mask electrode plate is placed and positioned on the frame By combining either the method of pressing the mask plate with the frame by pressing the laser transmission plate that transmits the laser beam from above the electrode plate and the non-contact welding method with the laser beam, The mask electrode plate and the frame are brought into close contact with each other with a uniform force without pressing the mask electrode plate against the frame by such an unreasonable force or a local force, so that wrinkles do not occur in the mask electrode plate. It made. In addition, since it is not necessary to repeat the pressurizing operation for each welding point, the welding work can be speeded up. Furthermore, maintenance of the welding electrode is not required, which leads to an increase in the tact time of the work and improves productivity To do.

Further, in the method of pressing the mask electrode plate from above with the laser transmitting plate, spatter scattering can be prevented, and adverse effects on the mask electrode plate due to spatter scattering can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic view of a mask electrode manufacturing apparatus for carrying out the method of the present invention.

FIG. 2 is a diagram showing a method of manufacturing a mask electrode according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a method of manufacturing a mask electrode according to the second embodiment of the present invention.

FIG. 4 is a diagram showing a method of manufacturing a mask electrode according to the third embodiment of the present invention.

FIG. 5 is a schematic view of a conventional mask electrode manufacturing apparatus.

[Explanation of symbols]

1 ... Frame, 2 ... Mask electrode plate, 3 ... Stage,
4 ... YAG laser device, 5 ... Optical fiber, 6 ... Lens unit, 7 ... Robot, 8 ... Magnet, 9 ... Magnetization frame, 10 ... Laser transmission plate.

Claims (3)

[Claims] 1. A mask electrode plate is placed and positioned on a frame, and a magnet is brought into contact with or close to the bottom of the frame to bring the mask electrode plate into close contact with the frame by the magnetic force of the magnet, A method of manufacturing a mask electrode, comprising irradiating a laser beam onto the mask electrode plate to bond the mask electrode plate and the frame together. 2. A mask electrode plate is placed and positioned on a pre-magnetized frame, the mask electrode plate is brought into close contact with the frame by the magnetic force of the frame, and then a laser is applied from above the mask electrode plate. A method of manufacturing a mask electrode, which comprises irradiating light to bond the mask electrode plate and the frame. 3. A mask electrode plate is placed and positioned on a frame, and the mask electrode plate is brought into close contact with the frame by pressing it on the mask electrode plate with a laser transmission plate that transmits laser light. A method of manufacturing a mask electrode, comprising irradiating a laser beam from above the laser transmission plate to bond the mask electrode plate and the frame together.