JPH01102915A - Manufacture of anode substance for tantalum capacitor - Google Patents
Manufacture of anode substance for tantalum capacitorInfo
- Publication number
- JPH01102915A JPH01102915A JP25951887A JP25951887A JPH01102915A JP H01102915 A JPH01102915 A JP H01102915A JP 25951887 A JP25951887 A JP 25951887A JP 25951887 A JP25951887 A JP 25951887A JP H01102915 A JPH01102915 A JP H01102915A
- Authority
- JP
- Japan
- Prior art keywords
- tantalum
- substance
- manufacture
- welded
- sintered
- 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.)
- Pending
Links
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003990 capacitor Substances 0.000 title claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 229910052715 tantalum Inorganic materials 0.000 title claims description 8
- 239000000126 substance Substances 0.000 title abstract 7
- 238000005245 sintering Methods 0.000 claims abstract description 11
- 230000001590 oxidative effect Effects 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 13
- 238000007664 blowing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 abstract description 6
- 239000007789 gas Substances 0.000 abstract description 4
- 229910052786 argon Inorganic materials 0.000 abstract description 3
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 abstract description 2
- 241000723346 Cinnamomum camphora Species 0.000 abstract description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 2
- 229960000846 camphor Drugs 0.000 abstract description 2
- 229930008380 camphor Natural products 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 本発明は固体電解コンデンサ用陽極体の製法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a method for manufacturing an anode body for a solid electrolytic capacitor.
特には、タンタル焼結体にタンタル線を溶接する際に非
酸化性ガスを吹付けながら行う製造方法に関する。In particular, the present invention relates to a manufacturing method in which a tantalum wire is welded to a tantalum sintered body while spraying a non-oxidizing gas.
従来の技術
従来のタンタル固体電解コンデンサの陽極体１は、タン
タル粉末２に適当なバインダーを添加したものを、金型
内に充填し、タンタル線３を挿入し上下より加圧成形し
た後、高真空中で焼結し製作していた。2. Prior Art The anode body 1 of a conventional tantalum solid electrolytic capacitor is made by filling a mold with tantalum powder 2 added with an appropriate binder, inserting a tantalum wire 3, and pressurizing it from above and below. It was manufactured by sintering in a vacuum.
発明が解決しようとする問題点
従来のタンタルコンデンサの陽極体は次の欠点を有して
いる。Problems to be Solved by the Invention The conventional anode bodies of tantalum capacitors have the following drawbacks.
（１）タンタル線を埋込みながら成形加工するため成形
体の密度が不均一になり易く、不均一な焼結体は後工程
で半導体物質の含浸が均質に行われずコン゛デンサの信
頼性がそこなわれる。(1) Since the tantalum wire is molded while being embedded, the density of the compact tends to be non-uniform, and non-uniform sintered products will not be uniformly impregnated with the semiconductor material in the subsequent process, resulting in poor reliability of the capacitor. be called.
（２） 成形時の作業能率が悪い。(2) Poor work efficiency during molding.
（３）タンタル粉とタンタル線との溶着部が機械的に弱
く、コンデンサにしてから機械的ストレスに対する弱点
部となる。(3) The weld between the tantalum powder and the tantalum wire is mechanically weak and becomes a weak point against mechanical stress after it is made into a capacitor.
（４）タンタル線が埋め込まれた部分はコンデンサの容
量として小さく、小型化の障害になっている。(4) The portion where the tantalum wire is embedded has a small capacitance of the capacitor, which is an obstacle to miniaturization.
これらの欠点を補う方法として特開昭６０＝５１２５４
号で示されている如く、焼結体を作成した後タンタル線
を突き合わせ溶接を行い、再度真空焼結する工程をもっ
て行う方法が公知である。As a method to compensate for these shortcomings, Japanese Patent Application Laid-Open No. 60-51254
As shown in No. 1, a method is known in which a tantalum wire is butt-welded after creating a sintered body, and vacuum sintered again.
しかしこの方法は陽極体の密度は均一になり容量のロス
も少ない利点をもっているが、二度の焼結工程を有して
いるため、作業能率がおちる。また−度焼結した後空気
中にさらすとタンタル粉の表面は酸素を吸着するが、こ
の吸着された酸素は二度目の焼結でタンタル金属内部へ
拡散し、結果として酸素含有料の多い陽極体となり、そ
の結果コンデンサの特性を低下させる問題があり、この
傾向は微粉末のタンタル粉はど顕著である。However, although this method has the advantage of making the density of the anode body uniform and reducing capacity loss, it requires two sintering steps, which reduces work efficiency. Furthermore, when exposed to air after sintering, the surface of tantalum powder adsorbs oxygen, but this adsorbed oxygen diffuses into the tantalum metal during the second sintering, resulting in an anode with a high oxygen content. There is a problem that the capacitor's characteristics deteriorate as a result, and this tendency is particularly noticeable in the case of fine tantalum powder.
問題点を解決するための手段
本発明のタンタルコンデンサ用陽極体は、タンタル粉を
真空焼結した焼結体を形成する工程、この焼結体にタン
タル線を溶接する際に溶接部分に非酸化性ガスを吹きつ
けながら溶着する工程を経て製作される。この非酸化性
ガスとしては窒素、アルゴンが利用できる。Means for Solving the Problems The anode body for tantalum capacitors of the present invention is manufactured by applying a non-oxidizing process to the welded part during the process of vacuum sintering tantalum powder to form a sintered body, and when welding a tantalum wire to this sintered body. It is manufactured through a process of welding while blowing a toxic gas. Nitrogen and argon can be used as this non-oxidizing gas.
作用
本発明の陽極体は、従来のようにタンタル線を焼結体に
溶着後再度焼結しなくてもコンデンサとしての特性を劣
化しないことがわかった。It has been found that the anode body of the present invention does not deteriorate its characteristics as a capacitor even if the tantalum wire is not sintered again after welding to the sintered body as in the conventional case.
実施例
タンタル粉にカンファー重量比で４％アルコールで溶か
して添加し、よく混合後、金型に充填して上下より加圧
成形して成形体を製作した。成形体の寸法は１．５鴎φ
Ｘ１．６ｍｅ、成形重量は１５．５■、成形密度は５．
５ｇｒ／ｃｃである。これを真空度１０−１■９、焼結
温度１５５０℃３０分保持の条件下で真空焼結し焼結体
１０を製作した。EXAMPLE A 4% camphor (by weight) alcohol solution was added to the tantalum powder, mixed well, and then filled into a mold and pressed from above and below to produce a molded body. The size of the molded body is 1.5mmφ
X1.6me, molding weight is 15.5cm, molding density is 5.
It is 5gr/cc. This was vacuum sintered under the conditions of a vacuum degree of 10-1×9 and a sintering temperature of 1550° C. for 30 minutes to produce a sintered body 10.
この焼結体１０を下記の条件でタンタル線１２と溶接１
３し、陽極体１５を製作した。This sintered body 10 is welded with tantalum wire 12 under the following conditions.
3, and an anode body 15 was manufactured.
タンタル線寸法 ０．３＋ｍ＋φ
溶 接 方 法 突き合わせ抵抗溶接溶接電流 １
８Ａ
溶接電圧 ２００ＶＡＣ
加 圧 力 ５ｋｌ／ａＪ雰 囲
気 溶接部にアルゴンガス吹き付け
１５Ｊ２／ｉｉｎ
比較例として、上記に対し雰囲気が空気中で行ったもの
で他は同一条件で溶接し、再度真空中で焼結した陽極体
を製作した。Tantalum wire size 0.3+m+φ Welding method Butt resistance welding Welding current 1
8A Welding voltage 200VAC Pressure 5kl/aJ atmosphere
Argon gas was sprayed on the welded part at 15 J2/iin.As a comparative example, an anode body was produced in which the above welding was carried out in air, but the welding was carried out under the same conditions as above, and the anode body was sintered again in vacuum.
これらの陽極体を用い、化成電圧１５０ｖ、硝酸マンガ
ン含浸焼成回数５回、再化成電圧７５Ｖを経てエポキシ
レジン外装被覆しタンタル固体電解コンデンサを製作し
、コンデンサの特性を比較した結果を下表に示す。Using these anode bodies, tantalum solid electrolytic capacitors were fabricated using an epoxy resin exterior coating after being subjected to a formation voltage of 150V, manganese nitrate impregnation and firing 5 times, and a re-formation voltage of 75V.The results of comparing the characteristics of the capacitors are shown in the table below. .
表
発明の効果
本発明のタンタルコンデンサ用陽極体は、真空焼結によ
り焼結体を製作後、非酸化性雰囲気中でタンタル線を溶
接するのみで、再度の焼結工程を用いなくても、コンデ
ンサとしての電気的特性が十分発揮され、製造工程の短
縮が図られた。Effects of the Invention The anode body for a tantalum capacitor of the present invention can be produced by simply welding a tantalum wire in a non-oxidizing atmosphere after producing a sintered body by vacuum sintering, without using a second sintering process. The electrical characteristics as a capacitor were fully demonstrated, and the manufacturing process was shortened.
第１図は本発明の断面図、第２図は従来の断面図である
。
図面において、１０：焼結体、
１２：タンタル線、 １３：溶接、
１５：コンデンサ。
特許出願人 日立コンデンサ株式会社FIG. 1 is a cross-sectional view of the present invention, and FIG. 2 is a conventional cross-sectional view. In the drawings, 10: sintered body, 12: tantalum wire, 13: welding, 15: capacitor. Patent applicant Hitachi Capacitor Co., Ltd.
Claims (1)
焼結体にタンタル線を溶接する際に溶接部分に非酸化性
ガスを吹きつけながら溶着することを特徴とするタンタ
ルコンデンサ用陽極体の製法。(1) A tantalum capacitor characterized by forming a sintered body by vacuum sintering tantalum powder, and when welding a tantalum wire to this sintered body, welding is performed while blowing non-oxidizing gas to the welded part. Manufacturing method of anode body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25951887A JPH01102915A (en) | 1987-10-16 | 1987-10-16 | Manufacture of anode substance for tantalum capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25951887A JPH01102915A (en) | 1987-10-16 | 1987-10-16 | Manufacture of anode substance for tantalum capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01102915A true JPH01102915A (en) | 1989-04-20 |
Family
ID=17335213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25951887A Pending JPH01102915A (en) | 1987-10-16 | 1987-10-16 | Manufacture of anode substance for tantalum capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01102915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015041779A (en) * | 2013-08-22 | 2015-03-02 | エイヴィーエックス コーポレイション | Thin wire/thick wire lead assembly for electrolytic capacitor |
-
1987
- 1987-10-16 JP JP25951887A patent/JPH01102915A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015041779A (en) * | 2013-08-22 | 2015-03-02 | エイヴィーエックス コーポレイション | Thin wire/thick wire lead assembly for electrolytic capacitor |
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