JPH02123724A - Manufacture of solid electrolytic capacitor - Google Patents
Manufacture of solid electrolytic capacitorInfo
- Publication number
- JPH02123724A JPH02123724A JP27804888A JP27804888A JPH02123724A JP H02123724 A JPH02123724 A JP H02123724A JP 27804888 A JP27804888 A JP 27804888A JP 27804888 A JP27804888 A JP 27804888A JP H02123724 A JPH02123724 A JP H02123724A
- Authority
- JP
- Japan
- Prior art keywords
- sintered body
- anode
- solid
- cathode
- resin
- 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 claims abstract description 23
- 239000007787 solid Substances 0.000 title claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 239000003973 paint Substances 0.000 claims abstract description 22
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 7
- 239000010955 niobium Substances 0.000 claims abstract description 7
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000007784 solid electrolyte Substances 0.000 claims description 18
- 238000005245 sintering Methods 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 abstract description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 2
- 229910017604 nitric acid Inorganic materials 0.000 abstract description 2
- 239000003792 electrolyte Substances 0.000 abstract 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- -1 tantalum or niobium Chemical compound 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業−１−の利用分野〕
この発明は、固体電解コンデンサの製造方法に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application in Industry-1-] The present invention relates to a method for manufacturing a solid electrolytic capacitor.
固体電解コンデンサは、タンタル、ニオブなどの弁作用
を有する金ノβ（粉末を焼結してなる陽極焼結体を備え
、この陽極焼結体は化成されたのち。A solid electrolytic capacitor is equipped with an anode sintered body made by sintering a valve-acting gold powder such as tantalum or niobium, and this anode sintered body is chemically formed.
例えば二酸化マンガンよりなる固体電解質によって覆わ
れ、さらにその上に陰極用導電性塗料などが塗布される
。For example, it is covered with a solid electrolyte made of manganese dioxide, and a conductive paint for the cathode is further applied thereon.
［発明が解決しようとする課題〕
固体１１Ｌ解コンデンサは、−（−記のようにして得ら
れるのであるが、固体電解質内に未充填部分（空隙）が
あると、例えば環境試験時間中にその特性が変化してし
まうという問題があった。すなわち、この未充填部分は
、通常は静電容量としては無効であるが、吸湿、乾燥な
どにより、静電容量分として作用する場合がある。[Problems to be Solved by the Invention] A solid 11L capacitor can be obtained as described in -(-), but if there is an unfilled portion (void) in the solid electrolyte, it may be damaged during an environmental test, for example. There is a problem in that the characteristics change.That is, although this unfilled portion is normally ineffective as a capacitance, it may act as a capacitance due to moisture absorption, drying, etc.
二の発明は、−１−記従来の欠点に鑑みなされたもので
、その目的は、固体電解質の未充填部分を無効として、
特性変化を生じないようにした固体電解コンデンサの製
造方法を提供することにある。The second invention was made in view of the conventional drawbacks mentioned in -1-, and its purpose is to make the unfilled portion of the solid electrolyte ineffective,
An object of the present invention is to provide a method for manufacturing a solid electrolytic capacitor that does not cause changes in characteristics.
また、この発明の他の目的は、損失角の正接がより低く
抑えられるようにした固体電解コンデンサの製造方法を
提供することにある。Another object of the present invention is to provide a method for manufacturing a solid electrolytic capacitor in which the tangent of the loss angle can be suppressed to a lower level.
上記第１の目的は、タンタル、ニオブなどの弁作用金属
粉末を焼結してなる陽極焼結体の表面に誘電体皮膜、固
体電解質および陰極用導電性塗料を順次形成したのち、
低粘度絶縁性樹脂中に浸漬し、同樹脂を上記陽極焼結体
の陽極リード側からｈ記固体電解質の未充填部分に含浸
させることによって達成される。The first purpose is to sequentially form a dielectric film, a solid electrolyte, and a conductive paint for a cathode on the surface of an anode sintered body made by sintering valve metal powder such as tantalum or niobium, and then
This is achieved by immersing the anode sintered body in a low-viscosity insulating resin and impregnating the unfilled portion of the solid electrolyte (h) from the anode lead side of the anode sintered body.
また、第２の目的は、タンタル、ニオブなどの弁作用金
属粉末焼結体からなる陽極焼結体の表面に誘電体皮膜、
固体電解質および陰極用導電性塗料を順次形成してなる
コンデンサ素子を低粘度絶縁性樹脂中に浸漬して、同樹
脂を上記陽極焼結体の陽極リード側から上記固体電解質
の未充填部分に含浸させるとともに、上記コンデンサ素
子の表面に形成された樹脂層の一部分を除去したのち、
さらに陰極用導電性塗料を塗布することによって達成さ
れる。The second purpose is to coat the surface of the anode sintered body made of a valve metal powder sintered body of tantalum, niobium, etc. with a dielectric film.
A capacitor element formed by sequentially forming a solid electrolyte and a conductive paint for the cathode is immersed in a low-viscosity insulating resin, and the resin is impregnated into the unfilled portion of the solid electrolyte from the anode lead side of the anode sintered body. At the same time, after removing a part of the resin layer formed on the surface of the capacitor element,
This is achieved by further applying a conductive paint for the cathode.
固体電解質の未充填部分に低粘度絶縁性樹脂が含浸され
ることにより、同未充填部分が無効となり、本来の静電
容量に影響を及ぼさなくなる。By impregnating the unfilled portion of the solid electrolyte with the low-viscosity insulating resin, the unfilled portion becomes ineffective and does not affect the original capacitance.
また、陰極外部端子板は、外側の陰極用導電性塗料層に
例えばハンダ付けされるが、この外側陰極用導電性塗料
層は、それよりも前に塗布された内側陰極用導電性塗料
に対して一体的に接続されるため、損失角の正接が改善
される。In addition, the cathode external terminal board is soldered to the outer cathode conductive paint layer, but this outer cathode conductive paint layer is different from the inner cathode conductive paint applied earlier. Since they are integrally connected, the loss angle tangent is improved.
以下、この発明の実施例を第１図および第２図を参照し
ながら詳細に説明する。Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 and 2.
まず、タンタル、ニオブなどの弁作用金属粉末を焼結し
て陽極焼結体１を形成する。その場合、陽極リード１ａ
の一端を陽極焼結体１内に予め埋設する。なお、陽極リ
ード１ａに二酸化マンガン這い上がり防止用のフッ素樹
脂板を嵌装しておいてもよい。First, the anode sintered body 1 is formed by sintering valve metal powder such as tantalum or niobium. In that case, anode lead 1a
One end of the anode is buried in the anode sintered body 1 in advance. Note that a fluororesin plate for preventing manganese dioxide from creeping up may be fitted onto the anode lead 1a.
次に、リン酸もしくは硝酸溶液中で陽極焼結体１の表面
に誘電体皮膜２を生成し、その上に例えば二酸化マンガ
ンからなる固体電解質３を形成する。さらに、この固体
電解質３上に陰極用導電性塗料４を塗布する。Next, a dielectric film 2 is formed on the surface of the anode sintered body 1 in a phosphoric acid or nitric acid solution, and a solid electrolyte 3 made of, for example, manganese dioxide is formed thereon. Further, a cathode conductive paint 4 is applied onto the solid electrolyte 3.
このようにして得られたコンデンサ素子１０を第２図（
ａ）に示すように、低粘度絶縁性樹脂５内に浸漬し、常
圧または真空含浸法にて同樹脂５を陽極焼結体１の陽極
リード１ａ側から固体電解質３の未充填部分に含浸させ
る。ついで、同図（ｂ）に示すように、コンデンサ素子
１０の底面および側面に付着している樹脂５を適当な有
機溶剤がしみ込まされている例えばスポンジ状の払拭具
１１にて拭い去る。これにより、低粘度絶縁性樹脂５は
コンデンサ素子１０の内部に残され、同素子１０の底面
および側面には陰極用導電性塗料４が震出する。この実
施例においては、払拭具１１はコンデンサ素子１０の高
さ方向はぼ２／３程度を受は入れる深さの四部１１ａを
有し、したがって低粘度絶縁性樹脂５は、コンデンサ索
子１０の［；面全面および側面ヒ部にその１／３程度の
幅をもって残される。The capacitor element 10 obtained in this way is shown in FIG.
As shown in a), the unfilled portion of the solid electrolyte 3 is immersed in a low-viscosity insulating resin 5, and the same resin 5 is impregnated from the anode lead 1a side of the anode sintered body 1 into the unfilled portion of the solid electrolyte 3 using a normal pressure or vacuum impregnation method. let Then, as shown in FIG. 2B, the resin 5 adhering to the bottom and side surfaces of the capacitor element 10 is wiped off with, for example, a sponge-like wiping tool 11 impregnated with a suitable organic solvent. As a result, the low-viscosity insulating resin 5 is left inside the capacitor element 10, and the cathode conductive paint 4 is extruded from the bottom and side surfaces of the element 10. In this embodiment, the wiping tool 11 has four parts 11a deep enough to receive about two-thirds of the capacitor element 10 in the height direction, and therefore the low-viscosity insulating resin 5 is [; Approximately 1/3 of the width is left on the entire surface and on the sidewalls.
しかるのち、コンデンサ素子１０の底面および側面にか
けてさらに陰極用導電性塗料６を塗布する。Thereafter, a cathode conductive paint 6 is further applied to the bottom and side surfaces of the capacitor element 10.
この陰極用導電性塗料６に第１図想像線で示すように、
陰極外部端子板１２が例えばハンダ付けされるのである
が、導電性塗料４と６は一体的に接続されているため、
損失角の正接が低く抑えられる。As shown by the imaginary line in FIG. 1, this cathode conductive paint 6 has
The cathode external terminal plate 12 is soldered, for example, but since the conductive paints 4 and 6 are integrally connected,
The tangent of the loss angle can be kept low.
（実験例）タンタル粉末１００■を焼結した陽極焼結体
を用いてコンデンサ素子を生成したのち、低粘度絶縁性
樹脂としてシリコン樹脂（信越化学二１―業■製のＫ
Ｊ ［＝’ ８４０ ）に浸漬し、同樹脂を真空含浸さ
せた。ついで、素子底面および側面に付着している樹脂
をキシレンをしみ込ませたスポンジにてぬぐい去り、残
された樹脂を１５０℃１時間で硬化させた。再度銀塗料
を塗布し硬化させ、同銀塗料に陰極外部端子板をハンダ
付けしたのち、外装用樹脂にてモールドして製品化した
。(Experiment example) After producing a capacitor element using an anode sintered body made by sintering 100 mm of tantalum powder, silicone resin (K manufactured by Shin-Etsu Chemical Co., Ltd.) was used as a low viscosity insulating resin.
J [='840] and vacuum impregnated with the same resin. Next, the resin adhering to the bottom and side surfaces of the element was wiped off with a sponge impregnated with xylene, and the remaining resin was cured at 150° C. for 1 hour. Silver paint was applied again and cured, and a cathode external terminal board was soldered to the same silver paint, and then molded with exterior resin to create a product.
この製品と低粘度絶縁性樹脂を含浸させない従来品の高
温負荷試験および耐湿性試験結果を次表に示す。The following table shows the high temperature load test and moisture resistance test results for this product and a conventional product that is not impregnated with low-viscosity insulating resin.
この表から明らかなように、静電容量変化率が大幅に改
善された。As is clear from this table, the capacitance change rate was significantly improved.
以」―説明したように、この発明によれば、低粘度絶縁
性樹脂を陽極焼結体の陽極リード側から固体電解質の未
充填部分に含浸させ、同未充填部分を無効としたことに
より、静電容量がきわめて安定した固体電解コンデンサ
が得られる。As explained above, according to the present invention, the unfilled portion of the solid electrolyte is impregnated with a low viscosity insulating resin from the anode lead side of the anode sintered body, and the unfilled portion is rendered ineffective. A solid electrolytic capacitor with extremely stable capacitance can be obtained.
また、陰極外部端子板が取付けられる外側陰極用導電性
塗料層は、それよりも前に塗布された内側陰極用導電性
塗料に対して一体的に接続されるため、損失角の正接が
改善される。In addition, the outer cathode conductive paint layer, to which the cathode external terminal board is attached, is integrally connected to the inner cathode conductive paint layer that was applied earlier, so the tangent of the loss angle is improved. Ru.
第１図はこの発明による固体電解コンデンサの−・例を
示した断面図、第２図（ａ）は樹脂の含浸状態を示した
説明図、同図（ｂ）は樹脂の払拭状態を示した説明図で
ある。
図中、１は陽極焼結体、１ａは陽極リード、２は誘電体
皮膜、３は固体電解質、４，６は陰極用導電性塗料、５
は低粘度絶縁性樹脂、ｌＯはコンデンサ素子である。
特許出願人 エルナー株式会社Figure 1 is a sectional view showing an example of a solid electrolytic capacitor according to the present invention, Figure 2 (a) is an explanatory diagram showing a resin impregnated state, and Figure 2 (b) shows a resin wiped state. It is an explanatory diagram. In the figure, 1 is an anode sintered body, 1a is an anode lead, 2 is a dielectric film, 3 is a solid electrolyte, 4 and 6 are conductive paints for cathodes, and 5
is a low viscosity insulating resin, and lO is a capacitor element. Patent applicant Elna Co., Ltd.
Claims (2)
てなる陽極焼結体の表面に誘電体皮膜、固体電解質およ
び陰極用導電性塗料を順次形成したのち、低粘度絶縁性
樹脂中に浸漬し、同樹脂を上記陽極焼結体の陽極リード
側から上記固体電解質の未充填部分に含浸させることを
特徴とする固体電解コンデンサの製造方法。(1) After sequentially forming a dielectric film, a solid electrolyte, and a conductive paint for the cathode on the surface of an anode sintered body made by sintering valve action metal powder such as tantalum or niobium, the film is coated in a low-viscosity insulating resin. A method for producing a solid electrolytic capacitor, which comprises soaking the anode sintered body to impregnate the unfilled portion of the solid electrolyte from the anode lead side of the anode sintered body.
らなる陽極焼結体の表面に誘電体皮膜、固体電解質およ
び陰極用導電性塗料を順次形成してなるコンデンサ素子
を低粘度絶縁性樹脂中に浸漬して、同樹脂を上記陽極焼
結体の陽極リード側から上記固体電解質の未充填部分に
含浸させるとともに、上記コンデンサ素子の表面に形成
された樹脂層の一部分を除去したのち、さらに陰極用導
電性塗料を塗布することを特徴とする固体電解コンデン
サの製造方法。(2) A capacitor element made of a low-viscosity insulating resin is formed by sequentially forming a dielectric film, a solid electrolyte, and a conductive paint for the cathode on the surface of an anode sintered body made of a sintered body of valve metal powder such as tantalum or niobium. After immersing the same resin into the unfilled portion of the solid electrolyte from the anode lead side of the anode sintered body and removing a part of the resin layer formed on the surface of the capacitor element, further A method for manufacturing a solid electrolytic capacitor, characterized by applying a conductive paint for a cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27804888A JPH02123724A (en) | 1988-11-02 | 1988-11-02 | Manufacture of solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27804888A JPH02123724A (en) | 1988-11-02 | 1988-11-02 | Manufacture of solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02123724A true JPH02123724A (en) | 1990-05-11 |
Family
ID=17591927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27804888A Pending JPH02123724A (en) | 1988-11-02 | 1988-11-02 | Manufacture of solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02123724A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483415A (en) * | 1993-02-26 | 1996-01-09 | Rohm Co., Ltd. | Solid electrolytic capacitor and method of making the same |
| CN1085393C (en) * | 1994-04-08 | 2002-05-22 | 罗姆股份有限公司 | Structure and production of solid electrolytic capacitor |
| US6420043B1 (en) | 1996-11-07 | 2002-07-16 | Cabot Corporation | Niobium powders and niobium electrolytic capacitors |
| US6616728B2 (en) | 1998-05-04 | 2003-09-09 | Cabot Corporation | Nitrided niobium powders and niobium electrolytic capacitors |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410964A (en) * | 1977-06-27 | 1979-01-26 | Fujitsu Ltd | Method of making solid electrolytic capacitor |
| JPS6025892A (en) * | 1983-07-21 | 1985-02-08 | Sanshin Ind Co Ltd | Trim tab for ship propulsion unit |
| JPS6293920A (en) * | 1985-10-19 | 1987-04-30 | エルナ−株式会社 | Manufacture of solid electrolytic capacitor |
| JPH01151228A (en) * | 1987-12-08 | 1989-06-14 | Matsushita Electric Ind Co Ltd | Manufacture of solid electrolytic capacitor |
-
1988
- 1988-11-02 JP JP27804888A patent/JPH02123724A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5410964A (en) * | 1977-06-27 | 1979-01-26 | Fujitsu Ltd | Method of making solid electrolytic capacitor |
| JPS6025892A (en) * | 1983-07-21 | 1985-02-08 | Sanshin Ind Co Ltd | Trim tab for ship propulsion unit |
| JPS6293920A (en) * | 1985-10-19 | 1987-04-30 | エルナ−株式会社 | Manufacture of solid electrolytic capacitor |
| JPH01151228A (en) * | 1987-12-08 | 1989-06-14 | Matsushita Electric Ind Co Ltd | Manufacture of solid electrolytic capacitor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5483415A (en) * | 1993-02-26 | 1996-01-09 | Rohm Co., Ltd. | Solid electrolytic capacitor and method of making the same |
| CN1085393C (en) * | 1994-04-08 | 2002-05-22 | 罗姆股份有限公司 | Structure and production of solid electrolytic capacitor |
| US6420043B1 (en) | 1996-11-07 | 2002-07-16 | Cabot Corporation | Niobium powders and niobium electrolytic capacitors |
| US6616728B2 (en) | 1998-05-04 | 2003-09-09 | Cabot Corporation | Nitrided niobium powders and niobium electrolytic capacitors |
| US6896715B2 (en) | 1998-05-04 | 2005-05-24 | Cabot Corporation | Nitrided niobium powders and niobium electrolytic capacitors |
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