JPH0580777B2 - - Google Patents
Info
- Publication number
- JPH0580777B2 JPH0580777B2 JP690985A JP690985A JPH0580777B2 JP H0580777 B2 JPH0580777 B2 JP H0580777B2 JP 690985 A JP690985 A JP 690985A JP 690985 A JP690985 A JP 690985A JP H0580777 B2 JPH0580777 B2 JP H0580777B2
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- wire
- oxide
- cathode material
- tungsten wire
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010406 cathode material Substances 0.000 claims description 20
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 7
- 239000012212 insulator Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000000020 Nitrocellulose Substances 0.000 claims description 3
- 229920001220 nitrocellulos Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 claims description 2
- 238000004070 electrodeposition Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 235000019441 ethanol Nutrition 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- HIXDQWDOVZUNNA-UHFFFAOYSA-N 2-(3,4-dimethoxyphenyl)-5-hydroxy-7-methoxychromen-4-one Chemical compound C=1C(OC)=CC(O)=C(C(C=2)=O)C=1OC=2C1=CC=C(OC)C(OC)=C1 HIXDQWDOVZUNNA-UHFFFAOYSA-N 0.000 description 1
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- FJWGYAHXMCUOOM-QHOUIDNNSA-N [(2s,3r,4s,5r,6r)-2-[(2r,3r,4s,5r,6s)-4,5-dinitrooxy-2-(nitrooxymethyl)-6-[(2r,3r,4s,5r,6s)-4,5,6-trinitrooxy-2-(nitrooxymethyl)oxan-3-yl]oxyoxan-3-yl]oxy-3,5-dinitrooxy-6-(nitrooxymethyl)oxan-4-yl] nitrate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O)O[C@H]1[C@@H]([C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@@H](CO[N+]([O-])=O)O1)O[N+]([O-])=O)CO[N+](=O)[O-])[C@@H]1[C@@H](CO[N+]([O-])=O)O[C@@H](O[N+]([O-])=O)[C@H](O[N+]([O-])=O)[C@H]1O[N+]([O-])=O FJWGYAHXMCUOOM-QHOUIDNNSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
Description
【発明の詳細な説明】
産業上利用分野
本発明は電子管等の陰極の製造方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for manufacturing cathodes for electron tubes and the like.
従来の技術
螢光表示管等の平板型表示装置の陰極として線
状熱陰極が使用されている。これらの線状熱陰極
は細いタングステン線表面に電着法等によつて酸
化物電子放射材料を塗着したものが一般に使用さ
れている。従来、タングステン線を酸化物陰極材
料を分散させた溶液中に導びき、一定電圧を加え
て前記タングステン表面に連続的に酸化陰極材料
を塗着したものが使用されて来た。2. Description of the Related Art A linear hot cathode is used as a cathode in a flat panel display device such as a fluorescent display tube. These linear hot cathodes are generally made by coating the surface of a thin tungsten wire with an oxide electron emitting material by electrodeposition or the like. Conventionally, a method has been used in which a tungsten wire is introduced into a solution in which an oxide cathode material is dispersed, and a constant voltage is applied to continuously coat the tungsten surface with the oxide cathode material.
螢光表示等の如く、架張された線状熱陰極の全
長に亘つて電子ビームの放出が必要であり、かつ
線状熱陰の長さがそれほど長くない場合は使用上
特に問題はなかつた。しかし、特願昭53−106788
号に開示される表示装置等の如く、線状熱陰極の
長さが数十センチメートルであつて、かつ対向電
極との間隔の精度が0.1mm以下である様な表示装
置においては、線状熱陰極の振動による前記間隔
の変化を防止するため、第２図に示す如く一定間
隔に支持体１０を基体９上に設ける必要がある。
この時、支持体１０と接触する部分のタングステ
ン線１表面の酸化物陰極材料７を除去しておかな
いと、前記酸化物陰極材料７が、剥離して対向電
極表面に付着し、電子ビームの軌道に悪影響する
等の不都合があつた。 There are no particular problems in use when it is necessary to emit an electron beam over the entire length of a stretched linear hot cathode, such as in a fluorescent display, and the length of the linear hot cathode is not very long. . However, patent application No. 53-106788
In a display device such as the display device disclosed in the above issue, the length of the linear hot cathode is several tens of centimeters, and the accuracy of the distance between the linear hot cathode and the counter electrode is 0.1 mm or less, In order to prevent the spacing from changing due to vibration of the hot cathode, it is necessary to provide supports 10 on the base 9 at regular intervals as shown in FIG.
At this time, if the oxide cathode material 7 on the surface of the tungsten wire 1 in contact with the support 10 is not removed, the oxide cathode material 7 will peel off and adhere to the surface of the counter electrode, and the electron beam will be There were some inconveniences such as a negative impact on the orbit.
発明が解決しようとする問題点
従来の製造法で連続的に電着させた線状熱陰極
では支持体との接触部分の酸化物陰極材料をあら
かじめ剥離しておく必要があつた。本発明は、酸
化物陰極材料を断続的に形成された線陰極の製造
法を提供することを目的とする。Problems to be Solved by the Invention In a linear hot cathode that is continuously electrodeposited using a conventional manufacturing method, it is necessary to peel off the oxide cathode material at the portion in contact with the support in advance. An object of the present invention is to provide a method for manufacturing a wire cathode in which oxide cathode material is formed intermittently.
問題点を解決するための手段
洗浄したタングステン線表面に、所定の間隔で
絶縁物を塗着し、乾燥した後に酸化物陰極材料を
電着する。Means for Solving the Problems An insulator is applied at predetermined intervals on the surface of the cleaned tungsten wire, and after drying, an oxide cathode material is electrodeposited.
作 用
タングステン線表面に一定間隔で酸化物陰極材
料が付着しない線状熱陰極を容易に製造すること
ができる。Function It is possible to easily manufacture a linear hot cathode in which the oxide cathode material does not adhere to the surface of the tungsten wire at regular intervals.
実施例
第１図に本願発明による線状熱陰極の製造工程
の一実施例を示す。１はタングステン線である。
通常使用するタングステン線は線径10〜50μｍ程
度の細いものが使用される。電界エツチング、水
洗等の洗浄工程（図示せず）を経て供給される。
２は絶縁物塗着装置である。この装置によつて一
定の決められた間隔毎に絶縁物が塗着される。絶
縁物材料としては酢酸エチル、エーテル等の有機
溶剤に溶解したニトロセルロース、或いはポリメ
タクリル酸ブチル等比較的低温で分解し、蒸発す
る有機材料を使用することが望ましい。前記絶縁
材料は線状熱陰極を電子管内に装着し、真空排気
後通電して酸化物陰極材料を分解、蒸発させる際
に陰極材料に悪影響を及ぼす、ハロゲン系の元
素、およびＳ、Ｎ等の元素を含まないものが望ま
しい。また、絶縁物の厚さは数ミクロンとなるよ
うに溶剤の粘度を調節して使用した。Embodiment FIG. 1 shows an embodiment of the manufacturing process of a linear hot cathode according to the present invention. 1 is a tungsten wire.
The tungsten wire normally used is thin with a wire diameter of about 10 to 50 μm. It is supplied after undergoing a cleaning process (not shown) such as electric field etching and water washing.
2 is an insulation coating device. This device applies insulating material at regular intervals. As the insulating material, it is desirable to use an organic material that decomposes and evaporates at a relatively low temperature, such as nitrocellulose dissolved in an organic solvent such as ethyl acetate or ether, or polybutyl methacrylate. The insulating material is made of halogen-based elements, S, N, etc. that have a negative effect on the cathode material when the linear hot cathode is installed in the electron tube and the oxide cathode material is decomposed and evaporated when it is energized after vacuum evacuation. Preferably one that does not contain any elements. Further, the viscosity of the solvent was adjusted so that the thickness of the insulator was several microns.
３は乾燥装置である。乾燥装置は有機溶剤を蒸
発させ絶縁物を乾燥固化させるためのものである
が、自然乾燥であつても特に問題はない。 3 is a drying device. Although the drying device is used to evaporate the organic solvent and dry and solidify the insulating material, there is no particular problem even if the drying device is used for natural drying.
４は酸化物陰極材料を電着するための電着槽で
ある。電着槽はステンレス等の金属槽とし、電着
時の一方の電極として使用することができる。電
着槽４の中には粒径数ミクロン以下の酸化物陰極
材料を分散させた溶液５が入つている。酸化物陰
極材料は通常トツプルカーボネート（Ba、Sr、
Ca）CO3の微粉末が使用される。分散溶液とし
てはエチルアルコール、ｎ−ブチルアルコール、
ｎ−ブチルアセテート等のアルコール系の有機溶
剤中に、結着剤としてニトロセルローズ等溶解し
たものが使用される。また、溶液の導電性を調節
するために硝酸アンモニア等の電解質が若干添加
される。タングステン線１と電着槽４の間に電圧
を印加しながら、ローラー６に導かせてタングス
テン線１を矢印の方向に一定速度で走らせると、
前記絶縁物の塗着されていない部分のタングステ
ン線表面に酸化物陰極材料が５〜10ミクロン電着
される。 4 is an electrodeposition tank for electrodepositing an oxide cathode material. The electrodeposition tank is a metal tank made of stainless steel or the like, and can be used as one electrode during electrodeposition. The electrodeposition bath 4 contains a solution 5 in which an oxide cathode material having a particle size of several microns or less is dispersed. Oxide cathode materials are usually topple carbonates (Ba, Sr,
Ca) CO 3 fine powder is used. As a dispersion solution, ethyl alcohol, n-butyl alcohol,
Nitrocellulose or the like dissolved in an alcohol-based organic solvent such as n-butyl acetate is used as a binder. Additionally, some electrolyte such as ammonium nitrate is added to adjust the conductivity of the solution. When a voltage is applied between the tungsten wire 1 and the electrodeposition tank 4, the tungsten wire 1 is guided by the roller 6 and run at a constant speed in the direction of the arrow.
An oxide cathode material of 5 to 10 microns is electrodeposited on the surface of the tungsten wire where the insulator is not coated.
第３図に一定間隔で酸化物陰極材料を電着した
線状熱陰極を示す。 FIG. 3 shows a linear hot cathode in which oxide cathode material is electrodeposited at regular intervals.
１はタングステン線であり、７はタングステン
線の１表面に電着された酸化物陰極材料、８は絶
縁物被膜を示している。絶縁物被膜８の塗着部分
の長さおよび間隔は必要に応じて任意に決めるこ
とができる。 1 is a tungsten wire, 7 is an oxide cathode material electrodeposited on one surface of the tungsten wire, and 8 is an insulating film. The length and spacing of the coated portions of the insulating film 8 can be arbitrarily determined as necessary.
発明の効果
酸化物陰極材料の無い部分を酸化物被覆時に容
易に形成できるため、線状陰極を使用するに際し
て酸化物陰極材料をあらかじめ除去する工程を省
くことができる。Effects of the Invention Since a portion without an oxide cathode material can be easily formed during oxide coating, the step of removing the oxide cathode material in advance when using a linear cathode can be omitted.
第１図は本発明の一実施例における線陰極の製
造工程を示す断面図、第２図は本発明による線陰
極の使用例を示す断面図、第３図は本発明によつ
て製造した線陰極の構造を示す断面図である。
１……タングステン線、２……絶縁物塗着装
置、３……乾燥装置、４……電着槽、５……酸化
物陰極材料分散液。
FIG. 1 is a cross-sectional view showing the manufacturing process of a wire cathode according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an example of the use of the wire cathode according to the present invention, and FIG. 3 is a cross-sectional view showing a wire cathode manufacturing process according to the present invention. FIG. 3 is a cross-sectional view showing the structure of a cathode. DESCRIPTION OF SYMBOLS 1... Tungsten wire, 2... Insulator coating device, 3... Drying device, 4... Electrodeposition tank, 5... Oxide cathode material dispersion liquid.
Claims (1)
布し、乾燥固化した後、酸化物陰極材料を電着さ
せることを特徴とする線陰極の製造方法。 ２ 絶縁物としてニトロセルローズを使用するこ
とを特徴とする特許請求の範囲第１項記載の線陰
極の製造方法。 ３ 絶縁物としてポリメタクリル酸ブチルを使用
することを特徴とする特許請求の範囲第１項記載
の線陰極の製造方法。[Scope of Claims] 1. A method for manufacturing a wire cathode, which comprises applying an insulator on the surface of a tungsten wire at predetermined intervals, drying and solidifying the material, and then electrodepositing an oxide cathode material. 2. The method for manufacturing a wire cathode according to claim 1, characterized in that nitrocellulose is used as the insulator. 3. The method for manufacturing a wire cathode according to claim 1, characterized in that polybutyl methacrylate is used as the insulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP690985A JPS61165936A (en) | 1985-01-18 | 1985-01-18 | Manufacture of linear cathodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP690985A JPS61165936A (en) | 1985-01-18 | 1985-01-18 | Manufacture of linear cathodes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61165936A JPS61165936A (en) | 1986-07-26 |
| JPH0580777B2 true JPH0580777B2 (en) | 1993-11-10 |
Family
ID=11651364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP690985A Granted JPS61165936A (en) | 1985-01-18 | 1985-01-18 | Manufacture of linear cathodes |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61165936A (en) |
-
1985
- 1985-01-18 JP JP690985A patent/JPS61165936A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61165936A (en) | 1986-07-26 |
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