JPS59132543A - Manufacture of electrode of picture display device - Google Patents

Abstract

PURPOSE:To stabilize picture quality while checking spatter scattering by a method wherein an electrode, which is to be arranged between a cathode and a phosphor through a spacer, is fired and fixed followed by applying an inorganic adhesive to the laser irradiating surface of the electrode while irradiating laser light in order to cut the electrode. CONSTITUTION:A plural number of electrodes are arranged between a cathode and a phosphor through a connecting spacer 10 in order to form a picture display device. In the constitution of a beam stream limiting electrode unit and a horizontal electrode unit, for instance, a spacer 10 is interposed between the beam stream limiting electrodes 5 and 5' in order to be fired. After firing, an inorganic adhesive 19 is applied thinly and evenly to the laser cutting part 14 with a brush or the like. Subsequently, the parts 14 are irradiated by a laser 20 while cutting and dividing the cutting parts arranged at equally-pitched intervals in ordr to constitute electrodes. In this way, spatter scattering can be checked and when uniting and firing the units, the assembly can be performed with no generation of accuracy error while stabilizing picture quality.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing electrodes for screen display devices in video equipment.

Conventional configuration and its problems An example of the basic configuration of a screen display device is shown in FIG. 1 and will be described.

1 is a back electrode, 2 is a cathode, 3 is a vertical focusing electrode, 4 is a vertical deflection electrode, 6 is a beam current limiting electrode, 6 is a horizontal focusing electrode, 7 is a horizontal deflection electrode, 8 is a beam accelerating electrode, and 9 is a screen. be.

The electron beam emitted from the cathode 2 is focused by a vertical focusing electrode 3 and vertically deflected by a vertical deflection electrode 4.

Next, the beam current is intensity-modulated by the beam current limiting electrode 5, and then focused in the horizontal direction by the horizontal focusing electrode 6.

Thereafter, the beam is deflected in the horizontal direction by the horizontal deflection electrode 7 and reaches the beam Kato electrode 8, where it is accelerated and the screen 9
It collides with the object and emits light. The back electrode 1 directs the electron beam
It works to push it out in the direction of J-9. The above is the general principle of the screen display device. Next, a method for manufacturing the above device will be explained. After the back electrode 1 to the screen 9 are fixed to each other at a predetermined distance and positioned in the in-plane direction of the electrodes by the coupling spacer 1o,
The screen display device is completed by being housed in a vacuum glass container (not shown).

Here, the positioning between the electrodes in the electrode plane direction is 1.3°4.
This is carried out using a positioning hole 11 that is precisely drilled in each of the electrodes 5, 6, 7.8, an electron beam source holding means, and an accelerating electrode holding means (both not shown), and a positioning pin 12 that commonly passes through the positioning hole 11. It will be done. When fixing each electrode, a method is adopted in which, due to the manufacturing process, the area from the back electrode 1 to the screen 9 is divided into several units, each of which is fixed, and then the units are fixed together. A beam current limiting electrode unit is shown and explained in FIG. 2.

A spacer 10 is interposed between the beam flow limiting electrodes 5 and 5', and a beam flow limiting electrode unit is constructed by firing and fixing these. The horizontal deflection electrode unit shown in FIG. 3 includes horizontal focusing electrodes 6 spacers 10, 10.
By firing and fixing the horizontal deflection electrode 7, a horizontal deflection electrode unit is constructed. Since the beam current limiting electrode unit and the ice water deflecting electrode unit constitute electrical electrodes, they must be divided into a part to which a 10 charge is applied and a part to which a negative charge is applied. However, these patterns have extremely small slit widths and extremely thin plate thicknesses, so
It is difficult to fix by firing in a divided state. Therefore, after the unit is fired and fixed, it is cut.

FIG. 4 shows a pattern of the beam flow limiting electrode 5, in which 13 is a slit portion, 14 is a cut portion, and 15 is a crosspiece.

FIG. 5 shows a pattern of the horizontal deflection electrode 7, where 16 is a slit portion 17 and a cut portion 18 is a crosspiece. Figure 4.

The cut portion of the pattern shown in FIG. 5 must be cut for the reasons stated above. However, since the slit width is extremely small and the plate thickness is extremely thin, this cutting is currently performed using a laser. However, in the above laser cutting method, spatter scatters during laser irradiation and adheres to the base surface of the electrode, and when the units are combined and fired, the spatter causes errors in thickness accuracy. In addition, the scattered sputter has a major disadvantage in that black spots appear on the screen, and furthermore, it has the disadvantage that electrons are charged when it adheres to the electrode portion.

Purpose of the Invention In view of the above drawbacks, the present invention provides a method for manufacturing a screen display device that can easily remove spatter even if it is scattered during laser cutting, and provides a highly reliable and inexpensive screen display device. It is something.

Structure of the Invention The present invention prevents spatter during cutting by applying an inorganic adhesive to the laser irradiation surface of the beam flow limiting electrode or the horizontal deflection electrode, and cleans away a small amount of scattered spatter with an organic solvent. This is a manufacturing method in which spatter is removed using a method that has the unique effect of improving the image quality of the screen display device.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 6 shows laser cutting of the beam current limiting electrode unit in one embodiment of the present invention. 6th
In the figure, 5 is a beam current limiting electrode, 1o is a spacer, 5
' is the other beam current limiting electrode. Reference numeral 14 indicates a laser cut portion, and an inorganic adhesive 19 is thinly and uniformly applied to this portion using a saw or the like. The laser cut portion 14 is irradiated with the laser 20, and the cut portions lined up at equal pitches are cut and divided to form the electrode. During this laser irradiation, an inorganic adhesive 19 is applied to the base portion of the electrode. This prevents spatter and minimizes adhesion to other substrate parts, and furthermore, a small amount of scattered spatter can be easily washed away by cleaning with an organic solvent. Spatter can be prevented from scattering by applying an inorganic adhesive to
When the units were combined and fired, they could be assembled without precision errors, and there was no adverse effect on image quality due to spatter, resulting in stable image quality and high reliability. Also, the horizontal deflection electrode is cut in the same manner as the beam flow limiting electrode.

Effects of the Invention As described above, the present invention prevents spatter scattering by applying an inorganic adhesive to the laser irradiated area, stabilizes the image quality, and supplies a large quantity of highly reliable and inexpensive screen display devices. It became possible to do so.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the screen display device, FIG. 2 is a sectional view of the beam current limiting electrode unit, FIG. 3 is a sectional view of the horizontal deflection electrode unit, and FIG. 4 is a plan view of the beam current limiting electrode pattern. FIG. 5 is a plan view of the horizontal deflection electrode pattern, and FIG. 6 is a sectional view of the beam flow limiting electrode cut by laser. 2... Cathode, 9... Fluorescent material, 1.
3,4゜6.6,7.8... Electrode, 10...
...Spacer, 19...Inorganic adhesive, 2o
······laser. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] a first step of providing a plurality of electrodes between the cathode and the phosphor via coupling spacers; a second step of firing and fixing the electrodes after the first step; A method for manufacturing an electrode for a screen display device, comprising a third step of applying an inorganic adhesive to a laser irradiated surface, and a fourth step of irradiating the laser irradiated surface with a laser and cutting the electrode after the third step.