JPH04107807A - Solid tantalum electrolytic capacitor - Google Patents
Solid tantalum electrolytic capacitorInfo
- Publication number
- JPH04107807A JPH04107807A JP2225543A JP22554390A JPH04107807A JP H04107807 A JPH04107807 A JP H04107807A JP 2225543 A JP2225543 A JP 2225543A JP 22554390 A JP22554390 A JP 22554390A JP H04107807 A JPH04107807 A JP H04107807A
- Authority
- JP
- Japan
- Prior art keywords
- tantalum
- wire
- tantalum powder
- electrolytic capacitor
- lead 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.)
- Pending
Links
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 title claims abstract description 45
- 239000003990 capacitor Substances 0.000 title claims description 12
- 229910052715 tantalum Inorganic materials 0.000 title claims description 12
- 239000007787 solid Substances 0.000 title claims description 9
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005530 etching Methods 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 8
- 238000007788 roughening Methods 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 239000007788 liquid Substances 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 4
- 238000005245 sintering Methods 0.000 description 2
- 238000005056 compaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007586 pull-out test Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はタンタル固体電解コンデンサに関し、さらに詳
しく言えば、その陽極引出しリード線に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to tantalum solid electrolytic capacitors, and more particularly to anode lead wires thereof.
タンタル固体電解コンデンサにおいては、そのタンタル
粉末の焼結時に、タンタル線からなる陽極引出しリード
線を焼結体の長さの約２／３程度埋設するようにしてい
る。In tantalum solid electrolytic capacitors, when the tantalum powder is sintered, an anode lead wire made of a tantalum wire is buried about two-thirds of the length of the sintered body.
より一層の高容麓化を図るため、タンタル粉末も高倍率
のものが用いられ、しかもその成形密度を低下させてい
る。そのため、タンタル粉末と陽極引出しリード線の接
触面積が低下し、焼結後のリード線引き抜き強度が弱く
なる傾向にある。In order to achieve even higher volume, tantalum powder with a high magnification ratio is also used, and moreover, the compaction density is reduced. Therefore, the contact area between the tantalum powder and the anode lead wire tends to decrease, and the lead wire pull-out strength after sintering tends to decrease.
本発明は上記従来の欠点を解決するためになされたもの
で、その構成上の特徴は、タンタル粉末の焼結体にタン
タルからなる陽極引出しリード線を植設してなるコンデ
ンサ素子を有するタンタル固体電解コンデンサにおいて
、上記陽極引出しリード線の少なくとも上記焼結体内に
埋設される埋設部分の表面を、エツチングにより使用す
るタンタル粉末の平均粒径とほぼ等しい粗面度をもって
粗面化したことにある。The present invention has been made in order to solve the above-mentioned conventional drawbacks, and its structural features include a tantalum solid material having a capacitor element formed by implanting an anode lead wire made of tantalum into a sintered body of tantalum powder. In the electrolytic capacitor, the surface of at least the buried portion of the anode lead wire buried in the sintered body is roughened by etching to a roughness approximately equal to the average particle diameter of the tantalum powder used.
陽極引出しリード線の表面がタンタル粉末の平均粒径と
ほぼ等しい粗面度をもって粗面化されているため、タン
タル粉末との接触面積が増大され。Since the surface of the anode lead wire is roughened to have a roughness approximately equal to the average particle diameter of the tantalum powder, the contact area with the tantalum powder is increased.
かつ、引き抜き強度も改善される。Moreover, the pull-out strength is also improved.
以下、比較例とともに本発明の実施例について説明する
。Examples of the present invention will be described below along with comparative examples.
く比較例〉耐電圧４Ｖ、静電容量１００μＦのタンタル
固体電解コンデンサを試作するため、４０，０００μＦ
ｖ／ｇのタンタル粉末を６０■使用し、成形密度５．５
で成形し、陽極引出しリード線としてφ０．２５のタン
タル線を植設した。この成形体を１４５０℃で焼結した
のち、タンタル線を引っ張ったところ、０．８〜１．０
ｋｇで抜けてしまった。Comparative example> In order to prototype a tantalum solid electrolytic capacitor with a withstand voltage of 4 V and a capacitance of 100 μF, a capacitance of 40,000 μF was used.
Using 60μ v/g tantalum powder, molding density 5.5
A tantalum wire of φ0.25 was implanted as an anode lead wire. After sintering this molded body at 1450°C, when a tantalum wire was pulled, the result was 0.8 to 1.0.
I lost it by kg.
〈実施例〉陽極引出しリード線として用いるφ０．２５
のタンタル線を）ｔＦ：ＨＮＯ，：Ｈ，０＝ ２＝３＝
５（容積比）のエツチング溶液に１０分間浸漬し、その
表面の粗面度を使用するタンタル粉末の粒径に近い１．
５μｌとした。<Example> φ0.25 used as anode lead wire
tantalum wire) tF:HNO, :H, 0= 2=3=
5 (volume ratio) for 10 minutes, the surface roughness is close to the particle size of the tantalum powder used.
The volume was 5 μl.
このタンタル線を上記比較例と同じ成形体に植設し、同
成形体を上記比較例と同じ条件で焼結したにの場合、タ
ンタル線の引き抜き強度は。When this tantalum wire is implanted in the same molded body as in the above comparative example and the same molded body is sintered under the same conditions as in the above comparative example, the pull-out strength of the tantalum wire is as follows.
１．５〜２．０ｋｇであった。It was 1.5-2.0 kg.
次に、タンタル線の粗面粒径を種々変えてその引き抜き
試験をした結果を次表に示す、なお、使用したタンタル
粉末の粒径は１．２〜１．５μ−であり、また、抜き不
良品数は試料１００個中におけるものである（引っ張り
強度１ｋｇ）。Next, the results of a pull-out test of tantalum wire with various grain sizes are shown in the table below.The particle size of the tantalum powder used was 1.2 to 1.5 μ- The number of defective products is among 100 samples (tensile strength 1 kg).
（表）
この表からも、タンタル線の粗面粒径は使用するタンタ
ル粉末の平均粒径に近似していることが好ましいと言え
る。(Table) Also from this table, it can be said that it is preferable that the rough surface particle size of the tantalum wire is close to the average particle size of the tantalum powder used.
以上説明したように１本発明によれば、陽極弓出しリー
ド線（タンタル線）の表面を、使用するタンタル粉末の
平均粒径とほぼ等しい粗面度をもって粗面化して同タン
タル粉末製の焼結体内に植設するようにしたことにより
、高容菫でしがもＳ極引出しリード線の引き抜き強度の
高いタンタル固体電解コンデンサが提供される６
特許出願人 エルナー株式会社As explained above, according to the present invention, the surface of the anode bowed lead wire (tantalum wire) is roughened to have a roughness approximately equal to the average particle diameter of the tantalum powder used, and the tantalum powder is sintered. By implanting the tantalum solid electrolytic capacitor in the structure, a tantalum solid electrolytic capacitor with high capacity and high pull-out strength of the S-pole lead wire is provided.6 Patent applicant: ELNA Co., Ltd.
Claims (1)
出しリード線を植設してなるコンデンサ素子を有するタ
ンタル固体電解コンデンサにおいて、上記陽極引出しリ
ード線の少なくとも上記焼結体内に埋設される埋設部分
の表面を、エッチングにより上記タンタル粉末の平均粒
径とほぼ等しい粗面度をもって粗面化したことを特徴と
するタンタル固体電解コンデンサ。(1) In a tantalum solid electrolytic capacitor having a capacitor element formed by implanting an anode lead wire made of tantalum in a sintered body of tantalum powder, at least the buried portion of the anode lead wire embedded in the sintered body A tantalum solid electrolytic capacitor characterized in that the surface of the tantalum solid electrolytic capacitor is roughened by etching to have a roughness approximately equal to the average particle diameter of the tantalum powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2225543A JPH04107807A (en) | 1990-08-28 | 1990-08-28 | Solid tantalum electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2225543A JPH04107807A (en) | 1990-08-28 | 1990-08-28 | Solid tantalum electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04107807A true JPH04107807A (en) | 1992-04-09 |
Family
ID=16830943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2225543A Pending JPH04107807A (en) | 1990-08-28 | 1990-08-28 | Solid tantalum electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04107807A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085273A (en) * | 1999-09-10 | 2001-03-30 | Matsushita Electric Ind Co Ltd | Chip-type solid-state electrolytic capacitor |
| JP2010500771A (en) * | 2006-08-16 | 2010-01-07 | ハー．ツェー．スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Semi-finished product having structured sintered active surface and method for producing the same |
| JP2018164060A (en) * | 2017-03-27 | 2018-10-18 | パナソニックＩｐマネジメント株式会社 | Solid electrolytic capacitor, and mold and method for manufacturing porous sintered product to be used for solid electrolytic capacitor |
| CN110957138A (en) * | 2019-11-18 | 2020-04-03 | 湖南华冉科技有限公司 | Inner wall treatment method of tantalum capacitor shell |
-
1990
- 1990-08-28 JP JP2225543A patent/JPH04107807A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001085273A (en) * | 1999-09-10 | 2001-03-30 | Matsushita Electric Ind Co Ltd | Chip-type solid-state electrolytic capacitor |
| JP2010500771A (en) * | 2006-08-16 | 2010-01-07 | ハー．ツェー．スタルク ゲゼルシャフト ミット ベシュレンクテル ハフツング | Semi-finished product having structured sintered active surface and method for producing the same |
| JP2018164060A (en) * | 2017-03-27 | 2018-10-18 | パナソニックＩｐマネジメント株式会社 | Solid electrolytic capacitor, and mold and method for manufacturing porous sintered product to be used for solid electrolytic capacitor |
| CN110957138A (en) * | 2019-11-18 | 2020-04-03 | 湖南华冉科技有限公司 | Inner wall treatment method of tantalum capacitor shell |
| CN110957138B (en) * | 2019-11-18 | 2024-04-16 | 湖南华冉科技有限公司 | Inner wall treatment method of tantalum capacitor shell |
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