JPH0722291A - Production of sintered body for solid electrolytic capacitor - Google Patents
Production of sintered body for solid electrolytic capacitorInfo
- Publication number
- JPH0722291A JPH0722291A JP5150463A JP15046393A JPH0722291A JP H0722291 A JPH0722291 A JP H0722291A JP 5150463 A JP5150463 A JP 5150463A JP 15046393 A JP15046393 A JP 15046393A JP H0722291 A JPH0722291 A JP H0722291A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- electrolytic capacitor
- solid electrolytic
- sintered
- metal powder
- 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.)
- Granted
Links
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は固体電解コンデンサ用焼
結体の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a sintered body for a solid electrolytic capacitor.
【０００２】[0002]
【従来の技術】従来の固体電解コンデンサ用焼結体は、
製作工程を単純化するため、図３に示すように弁作用を
有する金属粉末１を弁作用を有する金属線２が１本植立
するように加圧成形した後、高温・高真空にて焼結して
形成していた。2. Description of the Related Art A conventional sintered body for a solid electrolytic capacitor is
In order to simplify the manufacturing process, as shown in FIG. 3, metal powder 1 having a valve action is pressure-molded so that one metal wire 2 having a valve action is planted, and then baked at high temperature and high vacuum. It was formed by tying.
【０００３】あるいは、固体電解コンデンサの小型化の
ため、図４あるいは図５に示すように連結成形体を加圧
成形した後、高温・高真空にて焼結し焼結体を得てい
た。その後、固体電解質層４を形成し、モールド樹脂６
で外装し、固体電解コンデンサの切断面７１より各素子
を切り離し、固体電解コンデンサの切断面７１より陽極
を取り出していた（例えば、特開昭５２−９２３５８号
公報，特開昭５５−２４４５７号公報参照）。Alternatively, in order to reduce the size of the solid electrolytic capacitor, a connected compact was pressure-molded as shown in FIG. 4 or 5, and then sintered at high temperature and high vacuum to obtain a sintered compact. Then, the solid electrolyte layer 4 is formed, and the mold resin 6
Each element was separated from the cut surface 71 of the solid electrolytic capacitor, and the anode was taken out from the cut surface 71 of the solid electrolytic capacitor (for example, JP-A-52-92358 and JP-A-55-24457). reference).
【０００４】[0004]
【発明が解決しようとする課題】しかし、従来の製造方
法による固体電解コンデンサ用焼結体では、金属粉末１
と金属線２あるいは陽極を取り出す金属粉末を一対毎に
成形していたが、機械的強度を確保するために成形密度
が高くなり、焼結体の空孔が小さくなる傾向にあった。
その結果、焼結体内部の固体電解質層４が製作し難く、
固体電解コンデンサの誘電正接が大きくなりやすいとい
う問題があった。However, in the conventional sintered body for a solid electrolytic capacitor, the metal powder 1 is used.
Although the metal wire 2 or the metal powder for taking out the anode was molded in pairs, the molding density was increased to secure the mechanical strength, and the pores of the sintered body tended to be reduced.
As a result, it is difficult to manufacture the solid electrolyte layer 4 inside the sintered body,
There is a problem that the dielectric loss tangent of the solid electrolytic capacitor tends to increase.
【０００５】また、特開昭５２−９２３５８号公報ある
いは特開昭５５−２４４５７号公報に示すような固体電
解コンデンサ用焼結体では、成形体の形状が複雑のため
成形作業が難しいあるいは切断後固体電解質層４を一部
除去しなければならないため陽極の取出しが難しいとい
う問題があった。Further, in a sintered body for a solid electrolytic capacitor as disclosed in JP-A-52-92358 or JP-A-55-24457, the molding work is difficult because of the complicated shape or after cutting. There is a problem that it is difficult to take out the anode because the solid electrolyte layer 4 must be partially removed.
【０００６】[0006]
【課題を解決するための手段】本発明の固体電解コンデ
ンサ用焼結体の製造方法は、弁作用を有する金属粉末成
形体に、弁作用を有する金属線２を複数本、植立して加
圧成形し、これらを焼結した後、金属線２と焼結体が一
対づつになるよう焼結体をレーザ光あるいは超硬セラミ
ック刃で切断し、切断後に酸性液体で焼結体を処理する
ことを特徴とする固体電解コンデンサ用焼結体の製造方
法である。According to the method for producing a sintered body for a solid electrolytic capacitor of the present invention, a plurality of valve-acting metal wires 2 are planted and added to a valve-acting metal powder compact. After pressure forming and sintering these, the sintered body is cut with a laser beam or a cemented carbide blade so that the metal wire 2 and the sintered body are paired, and after cutting, the sintered body is treated with an acidic liquid. And a method for manufacturing a sintered body for a solid electrolytic capacitor.
【０００７】[0007]
【実施例】次に本発明について図面を参照して説明す
る。図１は本発明の一実施例の固体電解コンデンサ用焼
結体（以下焼結体と略す）の斜視図である。この焼結体
の製造に当たっては、まず弁作用を有する金属線２を複
数本、互いの金属線２が平行になるよう植立させて、弁
作用を有する金属粉末１を加圧成形する。次に加圧成形
した金属粉末１と金属線２を高温，高真空中で焼結し、
焼結後に焼結体を金属線２が一本づつ植立されるように
焼結体の切断面３に沿ってアルゴン等の不活性ガス中で
レーザ光あるいは超硬セラミック刃により切断する。そ
して、焼結体の切断面３に不純物が付着したり、焼結体
の切断面３が酸化等の変質を起こすため、焼結体１を酸
処理し、焼結体の切断面３をエッチングする。The present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a sintered body for a solid electrolytic capacitor (hereinafter abbreviated as a sintered body) according to an embodiment of the present invention. In manufacturing this sintered body, first, a plurality of metal wires 2 having a valve action are erected so that the metal wires 2 are parallel to each other, and the metal powder 1 having a valve action is pressure-molded. Next, the pressure-molded metal powder 1 and the metal wire 2 are sintered at high temperature and high vacuum,
After the sintering, the sintered body is cut by a laser beam or a cemented carbide blade in an inert gas such as argon along the cutting surface 3 of the sintered body so that the metal wires 2 are erected one by one. Then, since impurities are attached to the cut surface 3 of the sintered body or the cut surface 3 of the sintered body is deteriorated by oxidation or the like, the sintered body 1 is acid-treated and the cut surface 3 of the sintered body is etched. To do.
【０００８】図３に示すような従来製造法による焼結体
は、例えば幅２ｍｍ，厚さ１ｍｍ，高さ１．５ｍｍの寸
法の場合、成形密度が６．０ｇ／ｃｍ3 以下になると、
焼結工程までの取扱い中にくずれ、割れや欠け等が発生
していた。A sintered body manufactured by the conventional manufacturing method as shown in FIG. 3 has a width of 2 mm, a thickness of 1 mm and a height of 1.5 mm, and when the molding density is 6.0 g / cm 3 or less,
During the handling up to the sintering process, there were collapses, cracks and chips.
【０００９】一方、本発明の製造法による焼結体は、従
来製造法による幅２ｍｍ，厚さ１ｍｍ，高さ１．５ｍｍ
の焼結体を１６個製作する場合には、幅９ｍｍ，厚さ
４．５ｍｍ，高さ１．６ｍｍの寸法で金属粉末１を加圧
成形させ、幅方向に４本、厚さ方向に４本づつ金属線２
を植立させるが、５．４ｇ／ｃｍ3 まで金属粉末１の加
圧密度を下げても成形可能となる。その結果、本発明の
焼結体を使って固体電解コンデンサを製作する際、本発
明の焼結体の空孔がより大きくなり、固体電解質層４が
形成しやすくなり固体電解コンデンサの誘電正接は従来
より１２％も下げられる。そして成形作業時間は従来製
造法の８分の１になり、焼結後の切断および熱処理を実
施しても焼結体の製作の作業効率は２０％低減される。On the other hand, the sintered body produced by the production method of the present invention has a width of 2 mm, a thickness of 1 mm and a height of 1.5 mm produced by the conventional production method.
In the case of producing 16 sintered compacts of No. 3, the metal powder 1 is pressure-molded with a width of 9 mm, a thickness of 4.5 mm, and a height of 1.6 mm, and 4 pieces in the width direction and 4 pieces in the thickness direction. Two metal wires
However, even if the pressure density of the metal powder 1 is reduced to 5.4 g / cm 3, molding is possible. As a result, when a solid electrolytic capacitor is manufactured using the sintered body of the present invention, the pores of the sintered body of the present invention become larger, the solid electrolyte layer 4 is easily formed, and the dielectric loss tangent of the solid electrolytic capacitor is 12% lower than before. Further, the molding work time is 1/8 of that of the conventional manufacturing method, and even if cutting and heat treatment after sintering are carried out, the work efficiency of producing the sintered body is reduced by 20%.
【００１０】図２は、本発明の実施例２の斜視図であ
る。実施例１では金属粉末１から金属線２は一面のみか
ら導出されていたのに対し、実施例２では金属粉末１か
ら金属線２は二面から導出し、二面は互いに平行に位置
している。その結果実施例２は実施例１より更に金属粉
末１の加圧成形密度を低げることが可能となり、従来製
造法による幅２ｍｍ，厚さ１ｍｍ，高さ１．５ｍｍの焼
結体を３２個製作する場合には幅９ｍｍ，厚さ４．５ｍ
ｍ，高さ３．２ｍｍの寸法で金属粉末１を加圧成形さ
せ、幅方向に４本、厚さ方向に４本、高さ方向に２本づ
つ金属線２を植立させるが、５．１ｇ／ｃｍ3 まで金属
粉末１の加圧密度を下げても成形可能となる。そして、
成形作業時間は従来製造法の１６分の１になり、焼結後
の切断および熱処理を実施しても焼結体の製作の作業効
率は３０％低減できる。FIG. 2 is a perspective view of the second embodiment of the present invention. In Example 1, the metal powder 1 was derived from the metal wire 2 on only one surface, whereas in Example 2, the metal powder 1 was derived from the metal wire 2 on two surfaces, and the two surfaces were positioned parallel to each other. There is. As a result, in Example 2, the pressure compaction density of the metal powder 1 can be further reduced as compared with Example 1, and a sintered body having a width of 2 mm, a thickness of 1 mm and a height of 1.5 mm produced by the conventional manufacturing method is used. When manufacturing individually, width 9mm, thickness 4.5m
4. The metal powder 1 having a size of m and a height of 3.2 mm is pressure-molded, and four metal wires 2 are planted in the width direction, four in the thickness direction, and two in the height direction. It can be molded even if the pressure density of the metal powder 1 is reduced to 1 g / cm 3 . And
The molding work time is 1/16 of that of the conventional manufacturing method, and the work efficiency of producing a sintered body can be reduced by 30% even if cutting and heat treatment are performed after sintering.
【００１１】[0011]
【発明の効果】以上説明したように本発明は、焼結体を
複数個一体で加圧成形，真空焼結した後、個々に焼結体
を切断するので、次の効果を有する。 （１）焼結体を加圧成形する際、その成形密度を低下さ
せることができる。その結果、焼結体の空孔がより大き
くなる。 （２）焼結体の製作効率が改善される。As described above, according to the present invention, a plurality of sintered bodies are integrally pressure-molded, vacuum-sintered, and then the sintered bodies are individually cut, so that the present invention has the following effects. (1) When press-molding a sintered body, its molding density can be reduced. As a result, the pores of the sintered body become larger. (2) The manufacturing efficiency of the sintered body is improved.
【図１】本発明の第１実施例の焼結体の斜視図。FIG. 1 is a perspective view of a sintered body according to a first embodiment of the present invention.
【図２】本発明の第２実施例の焼結体の斜視図。FIG. 2 is a perspective view of a sintered body according to a second embodiment of the present invention.
【図３】従来の焼結体の斜視図。FIG. 3 is a perspective view of a conventional sintered body.
【図４】特開昭５５−２４４５７号公報に開示された焼
結体の斜視図（ａ）、およびその切断前の固体電解コン
デンサの断面図（ｂ）。FIG. 4 is a perspective view (a) of a sintered body disclosed in JP-A-55-24457 and a sectional view (b) of a solid electrolytic capacitor before cutting.
【図５】特開昭５２−９２３５８号公報に開示された焼
結体の斜視図（ａ）、およびその切断前の固体電解コン
デンサの断面図（ｂ）。FIG. 5 is a perspective view (a) of a sintered body disclosed in JP-A-52-92358 and a sectional view (b) of a solid electrolytic capacitor before cutting.
１ 金属粉末 ２ 金属線 ３ 焼結体の切断面 ４ 固体電解質層 ５ 陰極端子 ６ モールド樹脂 ７１，７２ 固体電解コンデンサの切断面 1 Metal Powder 2 Metal Wire 3 Cut Surface of Sintered Body 4 Solid Electrolyte Layer 5 Cathode Terminal 6 Mold Resin 71, 72 Cut Surface of Solid Electrolytic Capacitor
Claims (3)
を有する金属線を複数本植立して加圧成形し、焼結て焼
結体を得た後、前記金属線と前記焼結体が一対づつにな
るよう焼結体を切断し、切断後に酸性液体で切断された
焼結体を処理することを特徴とする固体電解コンデンサ
用焼結体の製造方法。1. A plurality of metal wires having a valve action are planted in a metal powder compact having a valve action, pressure-molded, sintered to obtain a sintered body, and then the metal wire and the sintered body are sintered. A method for producing a sintered body for a solid electrolytic capacitor, which comprises cutting the sintered body so that the body is paired and treating the sintered body with an acidic liquid after cutting.
なうことを特徴とする請求項１記載の固体電解コンデン
サ用焼結体の製造方法。2. The method for manufacturing a sintered body for a solid electrolytic capacitor according to claim 1, wherein the cutting of the sintered body is performed by using a laser beam.
用いて行なうことを特徴とする請求項１記載の固体電解
コンデンサ用焼結体の製造方法。3. The method for manufacturing a sintered body for a solid electrolytic capacitor according to claim 1, wherein the cutting of the sintered body is performed by using a cemented carbide blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150463A JP2513409B2 (en) | 1993-06-22 | 1993-06-22 | Method for manufacturing sintered body for solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5150463A JP2513409B2 (en) | 1993-06-22 | 1993-06-22 | Method for manufacturing sintered body for solid electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0722291A true JPH0722291A (en) | 1995-01-24 |
| JP2513409B2 JP2513409B2 (en) | 1996-07-03 |
Family
ID=15497473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5150463A Expired - Lifetime JP2513409B2 (en) | 1993-06-22 | 1993-06-22 | Method for manufacturing sintered body for solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2513409B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009239312A (en) * | 2001-10-01 | 2009-10-15 | Showa Denko Kk | Method of manufacturing tantalum sintered body, and method of manufacturing capacitor |
| JPWO2020195491A1 (en) * | 2019-03-27 | 2020-10-01 | ||
| WO2022191291A1 (en) * | 2021-03-12 | 2022-09-15 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5033456A (en) * | 1973-08-02 | 1975-03-31 | ||
| JPS5265853A (en) * | 1975-11-26 | 1977-05-31 | Nippon Electric Co | Method of manufacturing capacitor pellet |
| JPH02254108A (en) * | 1989-03-29 | 1990-10-12 | Permelec Electrode Ltd | Tantalum sintered body and its production |
-
1993
- 1993-06-22 JP JP5150463A patent/JP2513409B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5033456A (en) * | 1973-08-02 | 1975-03-31 | ||
| JPS5265853A (en) * | 1975-11-26 | 1977-05-31 | Nippon Electric Co | Method of manufacturing capacitor pellet |
| JPH02254108A (en) * | 1989-03-29 | 1990-10-12 | Permelec Electrode Ltd | Tantalum sintered body and its production |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009239312A (en) * | 2001-10-01 | 2009-10-15 | Showa Denko Kk | Method of manufacturing tantalum sintered body, and method of manufacturing capacitor |
| JPWO2020195491A1 (en) * | 2019-03-27 | 2020-10-01 | ||
| WO2020195491A1 (en) * | 2019-03-27 | 2020-10-01 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor and method for manufacturing same |
| CN113632189A (en) * | 2019-03-27 | 2021-11-09 | 松下知识产权经营株式会社 | Electrolytic capacitor and method for manufacturing the same |
| CN113632189B (en) * | 2019-03-27 | 2023-04-28 | 松下知识产权经营株式会社 | Electrolytic capacitor and method for manufacturing the same |
| US11823845B2 (en) | 2019-03-27 | 2023-11-21 | Panasonic Intellectual Property Management Co., Ltd. | Electrolytic capacitor and method for manufacturing same |
| WO2022191291A1 (en) * | 2021-03-12 | 2022-09-15 | パナソニックＩｐマネジメント株式会社 | Electrolytic capacitor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2513409B2 (en) | 1996-07-03 |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960312 |