KR910004950Y1 - Heater for stucking aluminium to internal side of picture tube - Google Patents

Abstract

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Description

Heater for aluminum vapor deposition in CRT

1 is an overall schematic view showing a general configuration of aluminum deposition on a CRT.

2 is a conventional configuration diagram showing an example of the use of the deposition heater.

3 is a front view (a) and a plan view (b) showing a deposition heater of the present invention.

4 is a perspective view illustrating various forms of the aluminum piece used by the present invention.

* Explanation of symbols for main parts of the drawings

H: Coil heater 1: One electrode

2: coil 3: pedestal

4: other electrode 5: aluminum piece

The present invention aims to achieve a perfect deposition effect by constructing a heater and a material for depositing aluminum on the inner wall of the CRT in a more improved form.

In general, in the manufacture of the cathode ray tube B, a thin aluminum film Al is formed by vacuum deposition after the phosphor S is formed in a predetermined pattern on the inner surface of the panel. . (See Figure 1)

The reason why the aluminum thin film Al is formed is because the deposited aluminum enhances the potential for doubling the luminance of the fluorescent surface and prevents the fluorescent surface from burning due to ion bombardment. Or continue the subsequent process. The vapor deposition method cleans the inside of the CRT or performs a pretreatment process such as lacquer film or graphite coating, and then places an aluminum material (W) on the coil heater (H) as shown in FIG. A thin aluminum film (Al) is formed on the inner surface by inserting the tube into a tube and evacuating the internal air to make a vacuum and then heating the heater to evaporate high purity aluminum (99.99%).

However, in the conventional heater and aluminum material implemented through the above method, as shown in FIG. 2, one electrode extends vertically and then the upper portion of the heater H made of a tungsten coil (W-Coil). After being formed at a constant pitch and diameter, the wire was connected to the other electrode. The aluminum material was cut into wires at an appropriate weight to form a "U" shape as shown in (a) or a fishing needle type as shown in (b). It was molded to hang on the coil of the heater described above.

The problem with this conventional method is that when the heater is heated, the contact part is melted and pressed, which shortens the life of the coil heater, and the corresponding equipment, Dolly (Dolly) in the exhaust furnace for high vacuum. Dropping due to the vibration of the bogie) is often frequent.

Therefore, since the problem of causing poor deposition and greatly reducing productivity has been inherent, the present inventors have come up with an improved structure of the coil heater and the aluminum material for the purpose of eliminating all the conventional drawbacks.

That is, the aluminum material does not stick to the coil and never fall off even when the vibration is applied. Hereinafter, the configuration and effect of the present invention will be described in detail with reference to the accompanying drawings.

3a is a front view of a coil heater according to the present invention, and (b) is a plan view of forming a tungsten coil heater (H), one side (1) extends vertically and is spirally wound from the top to the coil 2 with a constant pitch and diameter. ) To cross the center from the bottom to make a pedestal (3) and to extend down to form the other electrode (4).

That is, the portion which is horizontally connected at the point where the coil formation is completed forms the support part of the aluminum material, and the aluminum material has a semicircular shape (a) or a V-shaped cross section as exemplarily illustrated in FIG. b) or a piece 5 of constant length formed in a circular shape C so as to be caught by the pedestal 3 when inserted into the coil heater.

In the above configuration, since the aluminum piece 5 is inserted into the coil heater 2 to be supported by the pedestal 3, the molten metal is not melted and pressed at all, and is never dropped even when vibration from the dolly rack is transmitted. .

Therefore, it becomes possible to exert the function of the coil heater for a long time and the effect that the whole quantity can be worked well with respect to the CRT on which aluminum deposition is performed is provided, and also the aluminum piece 5 has a comparatively large area. Since it is configured in the form, it is a practical and useful design that can contribute to productivity improvement, as well as the above-described separation prevention function, as well as rapid and uniform deposition can be made fast heat conduction.

Claims (1)

In forming the tungsten coil heater (H), one electrode (1) extends vertically and is spirally wound at the top to form a coil (2) with a constant pitch and diameter, but crosses the center from the bottom to form a pedestal (3) The aluminum material which extends down to the electrode 4 and is inserted into the coil 2 is composed of an aluminum piece 5 having a predetermined length in which the aluminum sheet is formed in a semicircle, V-shaped or circular cross section, and is placed on the pedestal 3. Heater for aluminum deposition inside the CRT characterized by being supported.