KR100231184B1 - Getter for flat panel display - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a getter for a flat panel display that can increase the degree of vacuum by activating a getter made of a metal plate using a radio frequency (RF) heating method or another heating method on a glass substrate of a flat panel display. The getter layer 12 formed on the sealed inner side of the upper glass substrate 28 and the lower glass substrate 30 having the exhaust hole 23 formed thereon, and formed on the metal plate 16 having high thermal conductivity; Upper protrusions 18a and 18b formed on the left and right sides of the metal plate 16 on which the getter layer 12 is formed, and higher than the getter layer 12, and the upper protrusions 18a and 18b of the metal plate 16. It is characterized by consisting of lower projections 14a, 14b formed in opposite directions.

Description

Getters for Flat Panel Displays

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display device, in particular, to a flat panel display getter capable of increasing the degree of vacuum by activating a getter made of a metal plate using RF (Radio Frequency) heating or other heating methods. .

Generally, a getter is formed to maintain an internal vacuum of an FED device element, and a getter used therein includes an evaporable getter and a non-evaporable getter (NEG).

In addition, as a method of activating the getter, the getter is activated by a resistance heating method using a current, a radio frequency (RF) heating method used for an evaporative getter, a laser or an infrared heating method. Is activated by heating. Among them, the resistance heating method and the RF heating method are conveniently used.

For example, when an evaporable getter is used, the structure for forming the getter becomes complicated, and a high temperature problem in which the internal temperature rises to 800 to 1250 ° C when the getter is activated causes breakage problems in the glass, thus maintaining the degree of vacuum. There is a disadvantage that it is also difficult to process and the thickness of the device has a disadvantage.

In addition, since the evaporable getter is made of metal such as magnesium, barium, and aluminum, after the activator of the getter is activated to increase the degree of vacuum, the inside of the device may be electrically conductive, resulting in poor electrode control.

Due to the problems as described above, a high Porous Tick Film (HPTF) getter that can be used by directly mounting inside a panel without using a back chamber has been developed and applied.

High Porous Tick Film (HPTF) getters are sealed with a sealing paste 6 on a glass substrate 8 in which a getter made of getter material on a nichrome plate is superimposed on top and bottom plates, as shown in FIGS. The HPTF getter 2 is formed long in the nichrome layer 3 on the center of the display area, and a gas exhaust hole 10 is formed on one side of the upper and lower glass substrates 8. have.

The HPTF (High Porous Tick Film) getter is widely used to be mounted directly inside the panel without using a back chamber. However, the HPTF getter 2 is an HPTF getter 2 outside the glass substrate 8 having the upper and lower plates. Part is exposed and sealed by the sealing paste (6), and when the power is supplied to the HPTF getter (2), the gas generated inside is discharged through the exhaust hole (10). Due to the high heat is generated cracks in the sealing paste (Sealing Paste) portion 6 in contact with the HPTF getter (2) has a problem that the degree of vacuum falls.

As such, the problem of cracking in the sealing paste 6 on the glass substrate 8 is caused by the thermal expansion coefficient between the HPTF getter 2 and the glass substrate 8 to aggravate the defect, thereby greatly increasing the problem of vacuum degree. It has emerged.

It is created in view of the above-described problems, and an object of the present invention is to provide a getter for a flat panel display which can increase the degree of vacuum and lower the defective rate by minimizing the transfer of heat generated from the getter to the glass substrate when the getter is activated. .

1 is a cross-sectional view showing a conventional HPTF getter.

2 shows a conventional HPTF getter installed on a glass substrate.

3 is a plan view of a getter in which a getter layer is formed on a metal plate of the present invention, and a diagram showing a cross section of the getter.

4 is a view showing that a plurality of getters of the present invention are installed on an organic plate-like panel.

* Explanation of symbols for main parts of the drawings

12: getter layer 14a, 14b: lower protrusion

16 metal plate 18a, 18b upper protrusion

22: sealing paste 23: exhaust hole

28: upper glass substrate 30: lower glass substrate

32: getter

In order to achieve the above object, the getter 32 for a flat panel display of the present invention is formed on a sealed inner side of an upper glass substrate and a lower glass substrate on which exhaust holes are formed by a sealing paste, and a high thermal conductivity metal plate. And a getter layer formed thereon, an upper protrusion formed higher than the getter layer on the left and right sides of the metal plate on which the getter layer is formed, and a lower protrusion formed in the opposite direction to the upper protrusion of the metal plate.

The present invention configured as described above will be described in detail with reference to the accompanying drawings.

3 is a view showing a getter of the present invention a metal plate, Figure 4 is a view showing that the getter of the present invention is installed on a glass substrate.

The getter layer 12 is thinly formed on the central side of the metal plate 16, and the upper protrusions 18a and 18b and the lower protrusion 14a formed on the metal plate 16 on which the getter layer 12 is formed. (14b) is fixed to both ends with a sealing paste 25 on the lower glass substrate 30, which is a cathode electrode, or to the lower protrusions (14a, 14b) with a sealing paste. .

As described above, the metal plate 16 is fixed on the lower glass substrate 30, the upper glass substrate 28 is attached using the sealing paste 22, and then the panel is artificially evacuated, and then the lower glass substrate 30 is ) And the getter 32 formed between the upper glass substrate 28 and the upper glass substrate 28 by using RF (Radio Frequency) heating or other heating method, the stainless steel formed between the glass substrates 30, 28 The getter layer 12 formed on the metal plate 16 is activated to pump internal air through a chemical reaction.

Since the getter 32 is not in contact with the sealing paste 22 by the above structure, cracking by heat does not occur.

In the case of the PDP, the gap between panels is about 150 μm, and in the case of FED, about several hundred μm to several mm, the getter of the present invention is considerably narrow because a gap for the getter of at least 1 mm is required to reduce heat transfer. In the case of a panel requiring a gap between the upper and lower plates in width, a separate groove can be used separately.

In addition, when the getter is long, a protrusion may be formed on a part where the getter layer is formed so as to prevent the middle part where the getter is formed from being struck and to minimize heat transfer. It is preferable to form a getter with a small size and to use several.

Therefore, the present invention minimizes the heat generated from the getter when the getter is activated and is transferred to the glass substrate to increase the degree of vacuum and prevent cracking of the sealing paste, thereby reducing the defective rate, and the cost of use is also low. There is an advantage.

Claims (5)

In the getter for a flat panel display, a metal plate having a high thermal conductivity is formed on the sealed inner side of the upper glass substrate 28 and the lower glass substrate 30 on which the exhaust holes 23 are formed by the sealing paste 22 ( The getter layer 12 formed on the top surface 16 and the upper protrusions 18a and 18b formed higher than the getter layer 12 on the left and right sides of the metal plate 16 on which the getter layer 12 is formed, and the metal plate ( A getter for a flat panel display, characterized in that it comprises lower protrusions (14a) and (14b) formed in opposite directions to the upper protrusions (18a) and (18b) of the (16). The getter for flat panel displays according to claim 1, wherein the getter is operated by an RF heating method. 2. The getter for flat panel displays according to claim 1, wherein the metal plate (16) is stainless steel. The getter for a flat panel display according to claim 1, wherein a plurality of the getters are formed. The getter for a flat panel display according to claim 1 or 3, wherein the metal plate is fixed at both ends or protrusions by a sealing paste.