JPH0353511A - Manufacture of solid electrolytic capacitor - Google Patents
Manufacture of solid electrolytic capacitorInfo
- Publication number
- JPH0353511A JPH0353511A JP18942389A JP18942389A JPH0353511A JP H0353511 A JPH0353511 A JP H0353511A JP 18942389 A JP18942389 A JP 18942389A JP 18942389 A JP18942389 A JP 18942389A JP H0353511 A JPH0353511 A JP H0353511A
- Authority
- JP
- Japan
- Prior art keywords
- metal powder
- anode
- valve
- molded
- anode member
- 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
- 239000003990 capacitor Substances 0.000 title abstract description 17
- 239000007787 solid Substances 0.000 title abstract description 12
- 238000004519 manufacturing process Methods 0.000 title description 5
- 239000000843 powder Substances 0.000 claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 239000011230 binding agent Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 abstract description 7
- 229910052715 tantalum Inorganic materials 0.000 abstract description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000010405 anode material Substances 0.000 abstract 3
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 abstract 2
- RRZKHZBOZDIQJG-UHFFFAOYSA-N azane;manganese Chemical compound N.[Mn] RRZKHZBOZDIQJG-UHFFFAOYSA-N 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 abstract 1
- 239000007784 solid electrolyte Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固体電解コンデンサの製造方法に関し、特に弁
作用金属粉末を戒形して得られる陽極体の製造方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a solid electrolytic capacitor, and more particularly to a method for manufacturing an anode body obtained by shaping valve metal powder.
従来の固体電解コンデンサに用いられる陽極体は第３図
に示すように、例えばタンタル，ニオブ，チタン等の弁
作用金属粉末を同種弁作用金属よりなる陽極リード３の
一端を埋設して加圧成形した賜極体１を高真空中で焼結
することによって得られていた。As shown in Fig. 3, the anode body used in conventional solid electrolytic capacitors is made by embedding one end of the anode lead 3 made of the same valve metal and press-forming it with powder of a valve metal such as tantalum, niobium, or titanium. It was obtained by sintering the obtained electrode body 1 in a high vacuum.
上述した従来の固体電解コンデンサに用いられた陽極体
は成形体の強度を確保するために高密度加圧成形体とな
っているので固体電解質層成形時に硝酸マンガンが均一
に含浸されず、公知の手段でコンデンサ素子とした場合
、固体電解質層が酸化皮膜層を覆っている率（以下被覆
率と称す）が悪く容量不良やＴａｎδ不良等が発生する
という欠点があった。The anode body used in the conventional solid electrolytic capacitor mentioned above is a high-density press molded body to ensure the strength of the molded body, so manganese nitrate is not uniformly impregnated during solid electrolyte layer molding, and the well-known method When used as a capacitor element, the solid electrolyte layer covers the oxide film layer at a poor rate (hereinafter referred to as coverage), resulting in poor capacity, Tan δ defects, and the like.
また、上述の欠点を解決するために低密度加圧或形ずる
と陽極体の成形体強度が弱くワレ．力ケ．キレツ等が発
生し、陽極体を公知の手段によりコンデンサ素子とした
場合、漏れ電流を増大させ耐圧が劣化しコンデンサとし
ての信頼性に欠けるという欠点がある。In addition, in order to solve the above-mentioned drawbacks, if low-density pressurization or molding is used, the strength of the molded anode body becomes weak and cracks occur. Strength. If cracks or the like occur, and if the anode body is used as a capacitor element by known means, there is a drawback that the leakage current increases, the withstand voltage deteriorates, and the reliability as a capacitor is lacking.
本発明の目的は、固体電解質層成形時の硝酸マンガンの
含浸性が向上しコンデンサ素子の被覆率を大幅に改善で
き、しかも陽極体のワレ，カケ．キレツ等の不良を低減
できる固体電解コンデンサの製造方法を提供することに
ある。It is an object of the present invention to improve the impregnating property of manganese nitrate during solid electrolyte layer formation, to significantly improve the coverage of capacitor elements, and to prevent cracking and chipping of the anode body. An object of the present invention is to provide a method for manufacturing a solid electrolytic capacitor that can reduce defects such as cracks.
本発明の固体電解コンデンサの製造方法は、陽極リード
を導出する弁作用金属粉末から或る陽極体の内部を低密
度戒形し内部陽極体を形成する工程と、前記内部陽極体
の外側をバインダー添加した同種の弁作用金属粉末で覆
い加圧成形し陽極体を形成する工程とを含むことを特徴
として構或される。The method for manufacturing a solid electrolytic capacitor of the present invention includes a step of forming an internal anode body by forming an internal anode body from a valve metal powder from which an anode lead is derived, and a binder for the outside of the internal anode body. The method is characterized in that it includes a step of covering with added valve metal powder of the same type and press-molding to form an anode body.
次に、本発明について図面を参照して説明する．第１図
は本発明の一実施例を説明するための固体電解コンデン
サの縦断面図である。第１図において＠極体１は、例え
ば平均粒形２〜３μｍのタンタル等の弁作用金属粉末を
粉末戒形体密度３〜４ｇ／ｃｍ３で低加圧成形し、陽極
リード３を埋没させ仮成形し内部陽極体１ａとして、更
に有機バインダー２を添加した同種弁作用金属粉末を内
部陽極体１ａの外側に充填し粉末成形体密度５〜６ｇ／
ｃｍＳで加圧成形する。次に、高真空中で焼結し有機バ
インダー２を除去し陽極体として、順次酸化皮Ｍ層、固
体電解質層及び導電層を形成させて本発明の一実施例の
コンデンサとした。この場合、被覆率は大幅に改善され
、容量達或率，Ｔａｎδ共に２０％以上向上される。Next, the present invention will be explained with reference to the drawings. FIG. 1 is a longitudinal sectional view of a solid electrolytic capacitor for explaining one embodiment of the present invention. In Fig. 1, the electrode body 1 is formed by molding valve metal powder such as tantalum with an average grain size of 2 to 3 μm under low pressure at a powder density of 3 to 4 g/cm3, embedding the anode lead 3, and temporarily forming the powder. As the internal anode body 1a, the outside of the internal anode body 1a is filled with the same kind of valve action metal powder to which an organic binder 2 is added, and the powder compact density is 5 to 6 g/min.
Pressure mold with cmS. Next, it was sintered in a high vacuum to remove the organic binder 2, and as an anode body, an oxide skin M layer, a solid electrolyte layer, and a conductive layer were sequentially formed to form a capacitor according to an embodiment of the present invention. In this case, the coverage is greatly improved, and both the capacity attainment rate and Tan δ are improved by 20% or more.
また、陽極体内部の成形体密度を下げることにより外側
の密度を高くしても、含浸性のよい陽極体を提供できる
ため、陽極体のワレ．カケ，キレツ不良も大幅に低減さ
れる。In addition, by lowering the density of the molded body inside the anode body, even if the density of the outside is increased, it is possible to provide an anode body with good impregnability, which prevents cracks in the anode body. Chips and crack defects are also significantly reduced.
第２図は本発明の他力実施例の縦断面図である．内部陽
極体の成形方法を例えばノズル噴霧方式により陽極リー
ド３にタンタル等の弁作用金属粉末を吹き付けて圧着さ
せることにより内部の粉末成形体密度を２〜３ｇ／ｃｍ
’に下げることができ、硝酸マンガンの含浸性が更に向
上する利点がある。FIG. 2 is a longitudinal cross-sectional view of the external force embodiment of the present invention. For example, the inner anode body is formed by spraying valve action metal powder such as tantalum onto the anode lead 3 using a nozzle spraying method and press-bonding the powder to an inner powder compact density of 2 to 3 g/cm.
', which has the advantage of further improving the impregnating properties of manganese nitrate.
以上説明したように本発明は、陽極リードを導出する弁
作用金属粉末から成る陽極体の内部を低密度戒形し、そ
の外側をバインダー添加した同種の弁作用金属粉末で覆
い、加圧成形し陽極体を形戒するため、固体電解質層成
形時の硝酸マンガンの含漫性が向上しコンデンサ素子の
被覆率を大幅に改善するという効果がある．
また、陽極体の外側はバインダー添加粉末により粉末粒
子同志の接続が強化されており陽極体のワレ．カケ，キ
レッ等の不良を低減する効果もある。As explained above, in the present invention, the inside of the anode body made of valve metal powder from which the anode lead is derived is formed into a low-density shape, the outside is covered with the same type of valve metal powder added with a binder, and the anode body is press-molded. Because it protects the anode body, it improves the inclusion of manganese nitrate during solid electrolyte layer formation, which has the effect of greatly improving the coverage of the capacitor element. In addition, the outside of the anode body has a binder-added powder that strengthens the connection between the powder particles and prevents cracking of the anode body. It also has the effect of reducing defects such as chips and cracks.
第１図は本発明の一実施例を説明するための固体電解コ
ンデンサの陽極体の縦断面図、第２図は本発明の他の実
施例を説明するための固体電解コンデンサの陽極体の縦
断面図、第３図は従来の固体電解コンデンサの一例の陽
極体の縦断面図である。
ｌ・・・陽極体、
１
ａ・・・内部陽極体、
２・・・有機パイ
ンダー
３・・・陽極リード。FIG. 1 is a longitudinal cross-sectional view of an anode body of a solid electrolytic capacitor for explaining one embodiment of the present invention, and FIG. 2 is a longitudinal cross-sectional view of an anode body of a solid electrolytic capacitor for explaining another embodiment of the present invention. The plan view and FIG. 3 are longitudinal cross-sectional views of an anode body of an example of a conventional solid electrolytic capacitor. l... Anode body, 1 a... Internal anode body, 2... Organic binder 3... Anode lead.
Claims (1)
内部を低密度成形し内部陽極体を形成する工程と、前記
内部陽極体の外側をバインダー添加した同種の弁作用金
属粉末で覆い加圧成形し陽極体を形成する工程とを含む
ことを特徴とする固体電解コンデンサの製造方法。A step of forming an internal anode body by low-density molding the inside of an anode body made of valve metal powder from which an anode lead is led out, and a step of covering the outside of the internal anode body with the same type of valve metal powder added with a binder and press-molding. and forming an anode body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18942389A JPH0353511A (en) | 1989-07-21 | 1989-07-21 | Manufacture of solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18942389A JPH0353511A (en) | 1989-07-21 | 1989-07-21 | Manufacture of solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0353511A true JPH0353511A (en) | 1991-03-07 |
Family
ID=16241006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18942389A Pending JPH0353511A (en) | 1989-07-21 | 1989-07-21 | Manufacture of solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0353511A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100425254B1 (en) * | 2001-05-16 | 2004-03-30 | 한국표준과학연구원 | Nearly zero temperature coefficient of resistance in manganese nitride |
| EP1548770A1 (en) * | 2002-06-27 | 2005-06-29 | Dainippon Ink And Chemicals, Inc. | Formed product for electrolytic capacitor anode element, formed product with substrate, method for manufacture thereof and method for manufacturing electrolytic capacitor anode element |
| WO2007026165A1 (en) * | 2005-09-02 | 2007-03-08 | Avx Limited | Method of forming anode bodies for solid state capacitors |
| US7717967B2 (en) * | 2007-09-05 | 2010-05-18 | Nec Tokin Corporation | Method for manufacturing a solid electrolytic capacitor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59143316A (en) * | 1983-01-28 | 1984-08-16 | ユニオン・カ−バイド・コ−ポレ−シヨン | Bonding of lead wire to tantalum anode |
-
1989
- 1989-07-21 JP JP18942389A patent/JPH0353511A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59143316A (en) * | 1983-01-28 | 1984-08-16 | ユニオン・カ−バイド・コ−ポレ−シヨン | Bonding of lead wire to tantalum anode |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100425254B1 (en) * | 2001-05-16 | 2004-03-30 | 한국표준과학연구원 | Nearly zero temperature coefficient of resistance in manganese nitride |
| EP1548770A1 (en) * | 2002-06-27 | 2005-06-29 | Dainippon Ink And Chemicals, Inc. | Formed product for electrolytic capacitor anode element, formed product with substrate, method for manufacture thereof and method for manufacturing electrolytic capacitor anode element |
| EP1548770A4 (en) * | 2002-06-27 | 2008-12-17 | Dainippon Ink & Chemicals | Formed product for electrolytic capacitor anode element, formed product with substrate, method for manufacture thereof and method for manufacturing electrolytic capacitor anode element |
| WO2007026165A1 (en) * | 2005-09-02 | 2007-03-08 | Avx Limited | Method of forming anode bodies for solid state capacitors |
| US7717967B2 (en) * | 2007-09-05 | 2010-05-18 | Nec Tokin Corporation | Method for manufacturing a solid electrolytic capacitor |
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