KR20070065590A - Fabricating method of setter and setter for planar device - Google Patents

Abstract

A fabricating method of a setter and a setter for manufacturing a planar device are provided to minimize a non-uniform discharge space of the setter by forming uniform temperature in a molding region. A setter for manufacturing a planar device includes a crystalline glass material. A fabricating method of the setter includes a first heating process for heating a non-crystalline glass material setter at 700 to 780 degrees centigrade, a second heating process for heating the non-crystalline glass material setter at 1000 to 1100 degrees centigrade, and a cooling process for cooling the heated non-crystalline glass material setter.

Description

Setter for manufacturing setters and setters for fabricating flat panel elements {FABRICATING METHOD OF SETTER AND SETTER FOR PLANAR DEVICE}

1 is a graph showing heating conditions for forming crystalline glass,

2 a and b are photographs showing the setter before and after fabrication according to the heating conditions of the glass shown in FIG.

3 is a view showing the uniformity of the discharge space of a flat glass molded using the setter according to the present invention;

FIG. 4 is a diagram showing a discharge space uniformity of a flat glass formed using a conventional setter as a comparative example of the setter shown in FIG. 3; FIG.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a setter for manufacturing a flat lamp, and more particularly, to a setter for manufacturing a substrate usable for a backlight or a surface light source such as a liquid crystal display.

Liquid crystal display (Liquid Crystal Display) is a light-emitting display, unlike the cathode ray tube (CRT), Plasma Display Panel (PDP), FED (Field Emission Display) or light emitting diodes are light-receiving and cannot be used without a separate light source.

In order to overcome the above-mentioned problems, a form of a backlight capable of realizing an image even in a dark place has been proposed by installing a back light capable of generating light on the rear side of the liquid crystal display. Conventional backlights for liquid crystal displays use a light source in which a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp) is formed in a tubular form. The liquid crystal display including the cold cathode fluorescent lamp is equipped with a plurality of cold cathode fluorescent lamps under the liquid crystal panel, and the side of the liquid crystal panel using a direct light type or a transparent light guide plate in which a diffusion plate is inserted between the liquid crystal panel and the cold cathode fluorescent lamps. It can be classified into a side method of emitting light to the liquid crystal panel from the cold cathode fluorescent lamp installed in.

In recent years, as a surface light source for replacing a conventional cold cathode fluorescent lamp, a surface light source device including a flat glass formed by forming a plurality of partition walls has been proposed. The above-described surface light source device is a light source in which a plurality of discharge spaces corresponding to cold cathode fluorescent lamps are formed by bonding flat glass, and mercury is injected into each discharge space.

The above-described flat glass has a structure in which functional layers such as a reflective film, a protective film, a fluorescent film, and the like are laminated on a substrate, and the above-described functional layer may be formed by a thin film or a thick film process or the like. As the thick film process described above, a printing method or the like is preferred for manufacturing reasons, and a heat treatment process such as firing is required so that the printed pattern can form a solid functional layer.

Heat treatment of flat glass or the like is performed by passing through a continuous furnace such as a firing furnace, and a conveyor that can be used for the above-described heat treatment is a chain conveyor or a metal conveyor such as a mesh belt. . On the other hand, since flat glass is a fluid in which creep is severely generated even at room temperature, when the glass is loaded on a conveyor or the like during a high temperature firing process, there is a problem in that local damage occurs.

In order to mass-produce the above-described flat glass, the warpage of the flat glass should be prevented, and the surface light source device capable of generating light having uniform brightness should have a roughness of a surface or less. Therefore, a setter for supporting the flat glass is used in the process of manufacturing the flat glass. The setter described above minimizes damage to the flat glass during high temperature firing. The setter uses a special ceramic or carbon setter without thermal deformation even at high temperature, and is an expensive work piece with a surface processing in μm so as not to damage the surface of the flat glass.

However, the setter also causes a temperature deviation depending on the heating portion, and there is a limiting problem in providing a surface light source of uniform luminance applied to a liquid crystal of a large screen. In addition, a carbon setter or the like has a problem such as oxidation.

An object of the present invention is to provide a setter which can be applied to a surface light source having a large area and which is not oxidized and which can continuously form flat glass.

The setter for fabricating the flat plate element according to the present invention includes a crystalline glass material.

The glass setter manufacturing method described above,

A primary heating step of heating the setter of amorphous glass material to 700 to 780 degrees;

A secondary heating step of heating the setter to 1000 to 1100 degrees;

And air-cooling the secondary heated setter to form a crystalline glass material.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention; In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

1 is a graph showing heating conditions for forming crystalline glass. Existing setters may lose their thermal stability due to initial rapid crystallization. Therefore, the setter of crystalline glass material should be gradually heated initially. Referring to the graph of FIG. 1, the glass setter may include a first heating process of heating a crystalline glass setter to 700 to 780 degrees, a second heating process of heating the setter to 1000 to 1100 degrees, and 2 An air cooling process of air cooling the setter, which is subsequently heated.

The primary heating process is heated to the first elevated temperature for 15 to 2 hours, the primary elevated temperature is preferably 700 ~ 780 ℃. The secondary heating process is also suitable to increase the temperature for a time between 15 minutes to 2 hours to the secondary elevated temperature, the secondary elevated temperature is suitable for 1000 ~ 1100 ℃. In particular, in the secondary heating process, when the setter reaches the preset secondary elevated temperature, it is preferable to maintain the secondary elevated temperature within a time range of 5 minutes to 30 minutes. That is, in the primary heating process, the preferred temperature condition of the primary elevated temperature of the formed crystal glass material is 750 ° C., and the primary elevated temperature is preferably within 1 hour. In addition, preferable temperature conditions of a secondary temperature increase are 1050 degreeC, the time of a secondary temperature increase time is preferable within 30 minutes, and the time of holding | maintenance of a secondary temperature increase temperature within 10 minutes is preferable.

The primary heating process is a process of nucleation for forming a very small nucleus in amorphous glass material, and the secondary heating process is for growing nuclides formed in the primary heating process. It is a growth process. That is, the present invention relates to a method for manufacturing a setter formed of a crystalline glass material from an amorphous glass material by controlling the heating temperature and time of the glass material when manufacturing the glass setter.

FIG. 2A is a photograph showing before the setter of the crystalline glass material manufactured according to the method shown in the graph of FIG. 1, and FIG. 2B is a photograph showing after the setter of the crystalline glass material is manufactured. 2A is a photograph showing an amorphous glass material setter before firing, and FIG. 2B shows a setter after firing. The firing result setter according to the present invention can be seen that the transparency is reduced.

Example 1

The method of manufacturing the glass setter according to the present embodiment includes a first heating process of heating the glass setter for 30 minutes at room temperature to 750 ° C. for 1 hour, and maintaining the setter of glass material at 750 ° C. for 30 minutes. After heating for 30 minutes to ℃ and maintained for 10 minutes, and the air-cooling process to air-cool the secondary heated setter.

3 is a view showing a flat glass molded using a setter according to a preferred embodiment of the present invention, Figure 4 is a comparative example of Figure 3, a view showing a flat glass molded using a conventional setter. . In the flat glass shown in Figs. 3 and 4, a plurality of partitions are formed to form independent discharge spaces, respectively.

The height difference between one end 111 and the other end 112 of the flat glass 100 shown in FIG. 3 is uniformly formed to be 2.2 to 2.3 mm, while the flat plate formed using the conventional setter shown in FIG. 4. The type glass 200 has a height difference of 1.5 to 2.6 mm between the other ends 212, 222, and 232 at one end 211, 221, and 231, so that the flat glass of FIG. 4 has a higher height deviation than the flat glass shown in FIG. 3. Big. That is, the thickness difference of the flat glass produced using the setter according to the present invention is 0.1 mm, while there is no substantial difference, while the thickness difference of the flat glass formed using the conventional setter is 1.1 mm, which is incomparable with the present invention. It can be seen that it is large.

3 and 4 show the results of comparing and comparing the heights of the partition walls at opposite ends of the flat glass shown in FIG. 4.

collection division Front part (mm) Rear part (mm) One Board using conventional setter 1.9 2.6 Substrate using glass setter 2.2 2.3 2 Board using conventional setter 1.9 3.1 Substrate using glass setter 2.29 2.21 3 Board using conventional setter 1.5 1.5 Substrate using glass setter 2.18 2.22

The thickness difference of the flat glass as described above becomes a factor that impairs the luminance uniformity of the light source using the glass.

The present invention can provide a setter capable of minimizing the temperature of the forming region by using crystalline glass with controlled crystallization conditions, as well as minimizing the formation of non-uniform discharge spaces in which the glass sticks to the mold during molding. In addition, the setter according to the present invention can be applied to a large area surface light source by using crystallized glass, and is not oxidized, and continuous molding of flat glass is possible.

Claims (5)

In the setter for manufacturing a flat plate element, The setter is a setter for manufacturing a flat plate device, characterized in that it comprises a crystalline glass material. In the manufacturing method of the setter, A primary heating step of heating the amorphous glass setter to 700 to 780 degrees; A secondary heating step of heating the setter to 1000 to 1100 degrees; And a step of air cooling the secondary heated setter to form a crystalline glass material. The method of claim 2, The first heating process is a setter manufacturing method, characterized in that proceed for 15 minutes to 2 hours. The method of claim 2, The secondary heating process heats the setter for 15 minutes to 2 hours, the setter manufacturing method, characterized in that to maintain a constant heating temperature for a certain time after the heating. The method of claim 4, wherein And a setter heated to a predetermined temperature for 5 to 30 minutes in a heated state.

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