KR20050036087A - Getter - Google Patents

Abstract

The present invention relates to a getter capable of chemically (by chemical reaction) the residual gas in a closed vessel subjected to a first vacuum treatment with a vacuum pump to create a high vacuum, and particularly includes mercury as a component of the getter. It can be used exclusively for TFT-LCD (Thin Film Transistor-Liquid Crystal Display) CCFL (Cold Cathode Fluorescent Lamp). In addition, the getter of the present invention can be used not only in the TFT-LCD CCFL, but also in a high vacuum and inert gas atmosphere lamp containing a small amount of mercury.

Conventionally, when manufacturing a lamp, by inserting a getter to increase the degree of vacuum inside the lamp, and by adding mercury separately for the light emission of the lamp, the process is complicated and mercury is not injected constantly, a significant disadvantage has arisen.

However, the present invention was developed by applying the applicant's registered patent No. 364595, and by including mercury as a constituent of the getter to serve as a getter as one getter as well as to allow mercury injection inside the lamp. That is, when activating the getter, the mercury contained in the getter component and amalgam state is vaporized and released from the getter, and the escaped mercury flows into the lamp, allowing the lamp to be manufactured without a separate mercury injection. will be.

In general, the getter is excellent in performance, in order to obtain a getter suitable for the purpose, the study is continued by varying the composition and composition ratio. Therefore, the present invention has been developed by completely different getter components, composition ratios, and getter container materials, compared to the prior registered patent No. 364595, so that the desired amount of mercury in the temperature range of the TFT-LCD CCFL manufacturing process at high frequency. Release automatically. In addition, it is easy to use, in particular, easy to release the quantitative mercury by the high frequency, and the getter evenly receives heat by the high frequency operation in the temperature range (450 ~ 900 ℃) easy to getter activity and mercury release. And as in Patent No. 364595, mercury, which is a fatal factor of environmental hazards in the process of applying the getter, is not allowed to leak out at all in the manufacturing process.

Description

Getter for Lamps {Getter}

The present invention relates to a getter capable of chemically (by chemical reaction) of residual gas in a closed vessel subjected to a primary vacuum treatment with a vacuum pump to create a high vacuum, and particularly, includes a mercury as a constituent of the getter. It can be used exclusively for TFT-LCD (Thin Film Transistor-Liquid Crystal Display) CCFL (Cold Cathode Fluorescent Lamp). In addition to the TFT-LCD CCFL, this product can be used for high vacuum lamps with mercury or inert gas atmosphere lamps with mercury.

In general, as a getter, various metal components may be manufactured and used in an alloy, an intermetallic compound, a mixture, and the like depending on the components of the residual gas to be removed and the conditions used. The gas to be removed has to be chemically absorbed.

Therefore, many kinds of getters can be manufactured according to the kind and composition state (alloy, intermetallic compound, mixing, etc.) of the getter, and the effectiveness of the getter according to the type and composition ratio and the quality of the ingredients. It can vary greatly. Therefore, in order to obtain an excellent getter, the research is continued by varying the components of the getter and its composition ratio, and the development is still continuing.

One of the products using getter is TFT-LCD Cold Cathode Fluorescent Lamp (CCFL).

This lamp is widely applied to PC, Notebook PC, LCD TV, Mobile Phone, Video Phone, Car Navigater, etc. Getter is used to increase the degree of vacuum in the lamp, and mercury is used as the lamp's light emitting purpose.

However, the conventional getter other than the product developed by the inventor (Patent No. 363595) does not have a getter manufactured so that the getters can be used individually according to each lamp manufactured one by one. In other words, the conventional getter uses a product in which the getter is pressed into the inside of a long wire shape in which a rectangular shape is grooved, and a getter manufactured by attaching the getter to a thin long sheet metal. Since the getter was cut to a constant size every time the lamp was manufactured. Therefore, when cutting the getter, the getter powder containing mercury is desorbed, which makes the working environment very harmful, and the amount of getter and the amount of mercury are not constant depending on the degree of desorption, so the amount of mercury and the degree of vacuum are different. This results in cases where the quality is inconsistent. In addition, when the primary vacuum is performed with a vacuum pump, a lamp containing a getter is heated at about 400 ° C. in order to increase the first vacuum degree, and mercury is released during this process, which causes harmful work environment. There were many cases.

Conventionally, when manufacturing a lamp, by inserting a getter to increase the degree of vacuum inside the lamp, and by adding mercury separately for the light emission of the lamp, the process is complicated and mercury is not injected constantly, a significant disadvantage has arisen.

Therefore, the getter of the present invention has been invented, the getter of the present invention, by adding the mercury to the getter, not only serves as a single getter, but also allows the injection of the correct amount of mercury inside the lamp, so that the manufacturing process of the lamp much more It was made easier and also reduced the manufacturing cost of the lamp.

On the other hand, the getter of the present invention was developed by applying the applicant's pre-registered patent No. 364595, and the function of increasing the degree of vacuum and at the same time without a separate process change, by operating a high frequency to accurately and automatically the desired amount of mercury It was developed in accordance with the composition of the getter and the container material so that it can be put into the lamp. In particular, the composition of the getter was changed not only to get the heat evenly by the high frequency, but also to release mercury only in the desired temperature range (450 ~ 900 ℃). In addition, the amount of mercury released is kept constant, which significantly reduces the defective rate, and at the same time, it can increase the mercury emission and vacuum at one high frequency by matching the emission temperature range of the mercury with the active temperature at which the getter absorbs gas. It was.

The getter of the present invention as described above is a mixture of Iron (Fe) and Titanium (Ti) powder in a weight ratio of (10 ~ 60): (90 ~ 40) by using an electron beam above their melting point temperature using a Fe-Ti alloy (Alloy ) And an intermetallic compound, and the powder and Titanium (Ti) powder are mixed in a weight ratio of (0 to 96): (100 to 4) to form a Fe-Ti + Ti mixed powder. The mixed powder is mixed with mercury at a weight ratio of (30 ~ 90) :( 70 ~ 10) and reacted at a temperature of 350 ~ 1900 ℃ to form a (Fe-Ti + Ti) -Hg amalgam compound. One getter.

In addition, 30 to 100% (more than 30%) of (Fe-Ti + Ti) -Hg form amalgam compounds and 10 kinds of Zr, ZrFe, Ti, Ni, Co, Al, V, Fe, V-Al, ZrMn Among powders, each or some or all 10 kinds of powders are made by mixing uniformly 0 ~ 70% (70% or less), and then mix the powder with 1 ~ 3mm diameter and 1 ~ 10mm height container (nickel, stainless steel, stainless steel) Manufactured by pressurizing to nickel plating, iron plating, nickel plating on iron, clad of iron and nickel, nickel plating on copper, copper, molybdenum, titanium, or Pellet type form of powder itself without container (diameter 1 ~ 3mm) Molded into a cylindrical shape with a height of 1 to 10 mm) to produce a getter for mercury release.

When the getter of the present invention made of such a component is placed inside the lamp and heated at a high frequency at 450-900 ° C., the mercury, which was in the form of a getter and amalgam, is released in the form of Vapor from the getter to be injected into the lamp by itself. do. At the same time, the getter is activated in this temperature range and absorbs the remaining air remaining inside the lamp by chemical reaction to form a high vacuum.

The getter of the present invention mixes Iron (Fe) and Titanium (Ti) powder in a weight ratio of (10 to 60) :( 90 to 40) and uses Fe-Ti alloy (Alloy) or metal by using an electron beam above their melting point temperature. Make a liver compound, mix this powder with Titanium (Ti) powder by weight ratio (0 ~ 96) :( 100 ~ 4) to make Fe-Ti + Ti mixed powder, and then mix this powder with mercury (30 ~ 90): It is a getter (1) composed of an amalgam compound in the form of (Fe-Ti + Ti) -Hg by mixing at a weight ratio of (70 to 10) and reacting at a temperature of 350 to 1900 ° C.

In the above, the getter of the present invention composed of the compound (2) in the form of (Fe-Ti + Ti) -Hg has a pipe-shaped cylindrical container having a diameter of 1 to 3 mm and a height of 1 to 10 mm [FIG. It consists of a cylindrical container [Fig. 2], or the same shape as the standard (diameter, length), the same standard, the width of the side of the container by removing the portion of the container by the length of the container 0.01 ~ 3.0mm It can also be produced by press-filling a portion of the bursting container [Figs. 3 and 4], or by press-molding into a pellet type form (cylindrical shape having a diameter of 1 to 3 mm and a height of 1 to 10 mm) of the powder itself [Fig. 5]. It can also manufacture. As the material of the container 3, nickel, stainless steel, nickel plating on stainless steel, nickel plating on iron, iron, nickel plating on iron and nickel, copper plating, nickel plating on copper, molybdenum, titanium and the like can be used.

Meanwhile, as a getter component of the present invention, a compound of (Fe-Ti + Ti) -Hg form 30-100% (more than 30%) and Zr, ZrFe, Ti, Ni, Co, Al, V, Fe, V-Al, Among 10 powders of ZrMn, 0 to 70% (70% or less) of each or some or 10 of the whole powders may be mixed.

Hereinafter, the present invention will be described based on the TFT-LCD CCFL in which the getter of the present invention is used. The lamp 4 is widely used in a PC, a notebook PC, an LCD TV, a mobile phone, a video phone, a car navigator, and the like. A getter is inserted into the lamp to increase the degree of vacuum, and mercury is injected as a light emitting lamp. .

In the general lamp manufacturing process, a conventional method is manufactured by injecting a getter inside a long wire model in which a square is grooved, and attaching the getter to a thin, sheet metal. Since one getter was used, the getter was cut to a constant size every time the lamp was manufactured. Therefore, when cutting the getter, the getter powder containing mercury is desorbed, which makes the working environment very harmful, and the amount of getter is not constant according to the degree of desorption. Inconsistencies in production occur.

However, the use of the getter of the present invention solves the above problems because each of the getters serves as a single getter, as well as the function of increasing the degree of vacuum inside the lamp, and at the same time operating a high frequency without a separate process change. So that the desired amount of mercury can be injected into the lamp accurately and automatically. In particular, by varying the composition of the getter, not only the container material was changed evenly by the high frequency to get heat evenly, but also the mercury was released only at the desired temperature range (450 ~ 900 ℃). In addition, the amount of mercury released is kept constant, which significantly reduces the defective rate, and at the same time, it is possible to increase the mercury emission and vacuum at one high frequency by matching the emission temperature range of the mercury with the active temperature at which the getter absorbs gas. It was.

Hereinafter, a description will be given of a manufacturing process of a lamp using the getter of the present invention.

1) A first vacuum is formed by sucking the air in the lamp 4 at about 400 ° C. with a vacuum pump.

2) Seal and seal the upper end (5) of the lamp.

3) When the getter 1 inserted inside the lamp is heated at a high frequency at 450 to 900 ° C. to activate the getter, a high vacuum is generated by absorbing the remaining air remaining inside the lamp by a chemical reaction. On the other hand, when the getter is heated, mercury contained in the amalgam state inside the getter is vaporized and mercury is released from the getter, and the released mercury is moved to a lower temperature, thereby automatically moving toward the inner side of the lamp.

4) When mercury moves into the lamp 7 in which the electrode 8 is inserted, the lamp is completed by sealing the recess 6 in which the electrode is inserted.

As described above, the present invention eliminates the harmfulness and quality deviation of the work environment caused by powder detachment when cutting the existing getters by using the getters of the amalgam state individually, and especially the activity of the getters and the mercury by one high frequency operation. By developing the composition of the getter and the material of the container so that the release occurs easily at the same time, it was not only convenient for use, but also the amount of mercury released. In addition, the gas absorption performance of the getter is reduced to reduce the defect rate, and the quality and manufacturing cost are lowered.

Meanwhile, the getter of the present invention may be manufactured in a state in which the powder is pressurized and filled into a metal container, or may be manufactured in a pellet type form by press molding only the powder itself.

In the above, the container type getter is made of nickel, stainless steel, nickel plated steel, nickel plated iron, iron plated iron, nickel plated iron and nickel, copper plated, nickel plated copper, molybdenum and titanium. It is made of a material, and the typical size and shape of the container is a cup-shaped cylindrical container with a diameter of 0.5 to 6 mm and a height of 0.5 to 10 mm. The container can be used as an electrode attached to both sides of the lamp, thereby making it even larger. It could have an economic effect.

The getter of the present invention can be used for all lamps used for the light emission of mercury, and in particular, it can be used more and more exclusively in the TFT-LCD CCFL. The TFT-LCD CCFL is widely used in PCs, notebook PCs, LCD TVs, headphones, video phones, and car navigation systems. A getter is inserted into the lamp to increase the degree of vacuum, and mercury is injected as a lamp discharge. do.

However, the conventional general lamp has a disadvantage that the production process is cumbersome and the manufacturing cost is high because the overall lamp manufacturing process is complicated because the getter and mercury are separately put in the lamp. In addition, the conventional getters used in the TFT-LCD CCFL must be used to cut the getters to a certain size every time the lamp is manufactured. Therefore, the getter powder containing mercury desorbs every time the getters are cut. In addition, since the amount of the getter and the amount of mercury introduced according to the degree of desorption are not constant, the quality is produced unevenly due to the variation in the amount of mercury and the degree of vacuum.

In addition, since the conventional mercury injection method is injected in a liquid state, it is very difficult to accurately inject a small amount (highly in mg) of high specific gravity.

However, the getter of the present invention allows the mercury to be injected into the inside of the lamp through the getter in the amalgam state, so that the amount of mercury can be continuously injected at all times, thereby increasing the effect even more than the conventional method of injecting mercury separately. Will be.

In addition, the getter of the present invention which vaporizes mercury and injects it into a vapor state is very ideal because lamps manufactured using a minimum amount of mercury are absolutely preferred due to environmental problems around the world.

Furthermore, the getter of the present invention is an improvement and development of the applicant's registered patent No. 364595, and compared to the previously applied patent, the getter not only varied heat in the container material evenly by the high frequency, and the mercury of the getter accordingly. The release performance was improved. In addition, this product can be used without changing the existing process to which the getter is applied, so that the getter's activity and the desired amount of mercury can be accurately released in the existing application temperature range (450 to 900 ° C). In addition, the amount of mercury released was made constant to reduce the defect rate more remarkably, and to simultaneously and easily increase the mercury emission and vacuum degree with one high frequency.

1 is a perspective view of a pipe-shaped container as a getter of the present invention.

Figure 2 is a cross-sectional view of a cup-shaped container as another embodiment of the present invention.

Figure 3 is a perspective view of a pipe-shaped container cut one side of the side as another embodiment of the getter of the present invention.

Figure 4 is a perspective view of a cup-shaped container cut one side of the side as another embodiment of the getter of the present invention

5 is a perspective view of a pellet shape as another embodiment of the present invention.

Figure 6 is a schematic view of the manufacturing process of the lamp using the getter of the present invention

Fig. 7 is a schematic diagram of the final form of the lamp in which the getter of the present invention is used.

Claims (7)

Iron (Fe) and Titanium (Ti) are alloys, intermetallics, and mixed states, respectively, and some or all of the alloys, intermetallics, and mixed states have a weight ratio of (0 to 96%): (100 to 4%). Getter for configured lamp Iron (Fe) and Titanium (Ti) are alloys, intermetallics, and mixed states, respectively, and some or all of the alloys, intermetallics, and mixed states have a weight ratio of (0 to 96%): (100 to 4%). Getters for lamps in the form of Amalgam compounds prepared by reacting the composition and mercury at a weight ratio of (30-90%) :( 70-10%) Claim 2 and Zr, ZrFe, Ti, Ni, Co, Al, V, Fe, V-Al, ZrMn 10, each or some or all 10 (45-100%): (55 ~ 0% Getter for lamps that are uniformly mixed in a weight ratio of Claim 1 and Zr, ZrFe, Ti, Ni, Co, Al, V, Fe, V-Al, ZrMn 10, each or some or all 10 (45 ~ 100%): (55 ~ 0% Lamp getter consisting of amalgam-type compounds reacted with mercury and (30 ~ 100%) :( 70 ~ 0%) in a weight ratio evenly mixed at the weight ratio Claims 1, 2, 3, and 4 are configured by press-filling the container individually and in part or in whole, wherein the container has a cylindrical shape (Pipe shape) with a diameter of 0.5 to 6 mm and a height of 0.5 to 10 mm. It is made of a clogged cylindrical container (Cup shape), or the same shape as the above standard, but by removing the container material by their length with a width of 0.01 to 3.0 mm on these side surfaces, a part of the side surface is broken. Getters for lamps constructed of silver nickel, stainless steel, nickel plated on stainless steel, nickel plated on iron, iron, clad on iron and nickel, nickel plated on copper, copper, molybdenum and titanium The lamp getter of claim 1, 2, 3, and 4, wherein each and some or all of the powders are formed in a pellet form having a diameter of 0.5 to 6 mm and a height of 0.5 to 10 mm. Claim 1 is placed in a container in which one end of a wire plated with nickel is coated with nickel or copper or copper wire having a diameter of 0.1 to 2.5 mm and a length of 3 to 45 mm in the bottom outer center of the bottom-closed container (Cup shape). Claims 2, 3 and 4, respectively, and the getter for the lamp of the form of some or all powders.