JPS5845808B2 - Manufacturing method of electrolytic capacitor - Google Patents
Manufacturing method of electrolytic capacitorInfo
- Publication number
- JPS5845808B2 JPS5845808B2 JP3094276A JP3094276A JPS5845808B2 JP S5845808 B2 JPS5845808 B2 JP S5845808B2 JP 3094276 A JP3094276 A JP 3094276A JP 3094276 A JP3094276 A JP 3094276A JP S5845808 B2 JPS5845808 B2 JP S5845808B2
- Authority
- JP
- Japan
- Prior art keywords
- metal plate
- capacitor element
- chemical
- metal
- chemical conversion
- 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 title claims description 24
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 44
- 239000002184 metal Substances 0.000 claims description 44
- 239000000126 substance Substances 0.000 claims description 37
- 239000007788 liquid Substances 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing 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
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
Landscapes
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【発明の詳細な説明】
本発明は電解コンデンサ、主として固体電解コンデンサ
の製造方法の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the manufacturing method of electrolytic capacitors, primarily solid electrolytic capacitors.
一般に固体電解コンデンサは例えばクンタル、ニオブ、
アルミニウムなどのように弁作用を有する金属粉末を円
柱状に加圧成形し焼結してなるコンデンサエレメントに
予め弁作用を有する金属線材を植立し、このコンデンサ
エレメントの表面に酸化層、半導体層、電極引出し層を
形成すると共に金属線材並びに電極引出し層より外部リ
ード線を導出して構成されている。In general, solid electrolytic capacitors include Kuntal, Niobium,
A capacitor element is made by press-molding metal powder such as aluminum into a cylindrical shape and sintering it, and a metal wire having a valve action is planted in advance, and an oxide layer and a semiconductor layer are formed on the surface of this capacitor element. , an electrode lead-out layer is formed, and an external lead wire is led out from the metal wire and the electrode lead-out layer.
ところで、このコンデンサエレメントの表面には誘電体
層としての酸化層が形成されているのであるか、これは
例えば第１図に示すようにコンデンサエレメントＡを帯
状の金属板ＢにコンデンサエレメントＡより延びる金属
線材Ｃを用いて吊設し、このコンデンサエレメントＡを
化成槽りの化成液Ｅに浸漬した上で、化成槽りの底部に
配置した電極Ｆと金属板Ｂとの間に直流電圧を印加して
酸化層が形成されている。By the way, an oxide layer as a dielectric layer is formed on the surface of this capacitor element.For example, as shown in FIG. After suspending the capacitor element A using a metal wire C and immersing it in the chemical liquid E in the chemical conversion tank, a DC voltage is applied between the electrode F placed at the bottom of the chemical conversion tank and the metal plate B. As a result, an oxide layer is formed.
しかし乍ら、通常化成液Ｅの液温は高いはど化成処理の
能率が向上する関係で、高く設定されているために化成
液蒸気の発生が活発化し金属板Ｂと液面との間に蒸気層
が形成される。However, since the temperature of the chemical conversion liquid E is usually set high because the efficiency of the chemical conversion treatment is high, the generation of chemical liquid vapor becomes active and there is a gap between the metal plate B and the liquid surface. A vapor layer forms.
そしてこの蒸気は金属板Ｂが化成液Ｅの液温より低いた
めに金属板Ｂに露結し、金属板Ｂを腐蝕するのみならず
、その腐蝕物の化成液への混入によって化成液Ｅの寿命
（同一化成液で化成処理しうる回数）が短縮される。Since the temperature of metal plate B is lower than that of chemical liquid E, this vapor condenses on metal plate B and not only corrodes metal plate B, but also corrodes the chemical liquid E by mixing the corrosive substances into the chemical liquid E. The service life (the number of times chemical conversion treatment can be performed with the same chemical solution) is shortened.
又、蒸気層によって金属板Ｂと化成液Ｅの液面との間に
バイパスが形成され、この部分にも電流が流れるために
、本来金属線材Ｃ−コンデンサエレメントＡに流れるべ
き化成電流が減少してしまい、所望の化成ができなくな
るという不都合がある。In addition, a bypass is formed between the metal plate B and the liquid surface of the chemical liquid E by the vapor layer, and since current also flows through this part, the chemical conversion current that should originally flow between the metal wire C and the capacitor element A is reduced. This has the disadvantage that the desired chemical formation cannot be achieved.
従って、従来においては金属線材Ｃの長さを極力長く設
定することによって金属板Ｂへの化成液蒸気の露結、バ
イパス電流による本来の化成電流の減少を防止している
が、特に固体クンタル電解コンデンサにあっては金属線
材Ｃに高価なタンタル線が使用されるために、製品のコ
ストが著しく高くなるという欠点がある。Therefore, in the past, the length of the metal wire C was set as long as possible to prevent dew formation of the chemical liquid vapor on the metal plate B and a decrease in the original chemical conversion current due to the bypass current. Since expensive tantalum wire is used for the metal wire C in the capacitor, there is a drawback that the cost of the product becomes significantly high.
本発明はこのような点に鑑み、金属板とコンデンサエレ
メントを連結する金属線材の長さを特に長くしなくても
化成液蒸気の露結による金属板の腐蝕がなく、しかもコ
ンデンサエレメントを確実に化成しうる電解コンデンサ
の製造方法を提供するもので、以下実施例について説明
する。In view of these points, the present invention prevents corrosion of the metal plate due to condensation of chemical liquid vapor without making the length of the metal wire that connects the metal plate and the capacitor element particularly long, and also ensures that the capacitor element is securely connected. This invention provides a method for manufacturing an electrolytic capacitor that can be chemically formed, and examples thereof will be described below.
第２図において、１は弁作用を有する金属部材よりなる
コンデンサエレメントで、図示例は金属粉末を円柱状に
加圧成形し焼結して形成されているが、板材、線材など
も使用しうる。In Fig. 2, numeral 1 denotes a capacitor element made of a metal member having a valve action. In the illustrated example, it is formed by press-molding metal powder into a cylindrical shape and sintering it, but plates, wires, etc. can also be used. .
２は金属板で、コンデンサエレメント１がそれより延び
る金属線材３を用いて吊設されている。Reference numeral 2 denotes a metal plate, from which the capacitor element 1 is suspended using a metal wire 3 extending therefrom.
尚、金属線材３は弁作用を有するものが望ましいが、そ
れ以外のものでも表面に絶縁被膜を形成して用いること
ができる。It is preferable that the metal wire 3 has a valve action, but other metal wires can also be used with an insulating coating formed on the surface.
４は化成槽で、その底部には電極板５が配設されている
。4 is a chemical conversion tank, and an electrode plate 5 is disposed at the bottom thereof.
６は化成槽４に注入された化成液で、例えば液温は５０
℃程度にコントロールされている。6 is a chemical liquid injected into the chemical conversion tank 4, for example, the liquid temperature is 50°C.
It is controlled at around ℃.
７は化成槽４の上部に配設された加熱装置で、金属板２
を化成液６の液温以上に加熱するように配慮されている
。7 is a heating device disposed at the top of the chemical conversion tank 4, and the metal plate 2
Care is taken to heat the chemical liquid 6 to a temperature higher than that of the chemical liquid 6.
尚、加熱装置１は輻射熱による他、伝導熱、温風を利用
できるし、その配設場所も上部以外にできる。The heating device 1 can use not only radiant heat but also conductive heat and hot air, and can be installed in a location other than the top.
まず、金属板２を化成槽４上に、コンデンサエレメント
１が化成液６に完全に浸漬されるように設置すると共に
、金属板２の上部に加熱装置７を位置させる。First, the metal plate 2 is placed on the chemical conversion tank 4 so that the capacitor element 1 is completely immersed in the chemical conversion liquid 6, and the heating device 7 is positioned above the metal plate 2.
この状態で、金属板２と電極板５との間に金属板２が陽
極となるように直流電圧を印加すると、金属板２−金属
線材３−コンデンサエレメント１−化成液６−電極板５
に化成電流が流れ、コンデンサエレメント１の表面には
除々に酸化槽が形成される。In this state, when a DC voltage is applied between the metal plate 2 and the electrode plate 5 so that the metal plate 2 becomes an anode, the metal plate 2 - metal wire 3 - capacitor element 1 - chemical liquid 6 - electrode plate 5
A chemical current flows through the capacitor element 1, and an oxidation tank is gradually formed on the surface of the capacitor element 1.
この際、化成液６より蒸気が発生しているのであるが、
金属板２は加熱装置γによって化成液６の液温以上に加
熱されているので、化成液蒸気の金属板２への露結は皆
無となる。At this time, steam is generated from the chemical liquid 6,
Since the metal plate 2 is heated by the heating device γ to a temperature higher than the liquid temperature of the chemical conversion liquid 6, there is no dew condensation of the chemical conversion liquid vapor on the metal plate 2.
従って、金属板２の腐蝕も皆無ないし極めて減少するた
めに化成液の寿命を大巾に改善できるし、その上、バイ
パスの形成もないので、確実にコンデンサエレメント１
を化成することができる。Therefore, the corrosion of the metal plate 2 is completely eliminated or extremely reduced, so that the life of the chemical liquid can be greatly improved.Furthermore, since there is no formation of a bypass, the capacitor element 1 can be reliably
can be chemically formed.
このような金属板２の腐蝕並びにバイパス電流を抑止で
きる関係で、金属板２としてタンタル、ステンレス以外
に安価な鉄板などの使用が可能となるのみならず、金属
線材３の長さをも短くすることができる。Since such corrosion of the metal plate 2 and bypass current can be suppressed, it is not only possible to use an inexpensive iron plate other than tantalum or stainless steel as the metal plate 2, but also the length of the metal wire 3 can be shortened. be able to.
特に金属線材３として例えばタンタル線のように高価な
線材を使用する場合にはそれの寸法短縮によって製品の
コストダウンを計ることができる上、資源の有効利用の
面からも望ましいものである。In particular, when an expensive wire such as tantalum wire is used as the metal wire 3, the size of the wire can be shortened to reduce the cost of the product, and this is also desirable from the standpoint of effective resource utilization.
以上のように本発明によれば、金属板とコンデンサエレ
メントを連結する金属線材の長さを特に長くしなくても
化成液蒸気の露結による金属板の腐蝕が抑止でき、しか
もコンデンサエレメントを確実に化成処理できるという
優れた効果が得られる。As described above, according to the present invention, corrosion of the metal plate due to dew condensation of chemical liquid vapor can be suppressed without particularly increasing the length of the metal wire connecting the metal plate and the capacitor element, and the condenser element can be securely maintained. The excellent effect of chemical conversion treatment can be obtained.
第１図及び第２図は従来及び本発明に係る化成方法を説
明するための側断面図である。FIGS. 1 and 2 are side sectional views for explaining the conventional chemical conversion method and the present invention.
Claims (1)
ンデンサエレメントを金属線材を介して吊設し、このコ
ンデンサエレメントを化成液に浸漬して化成処理するに
際し、金属板を化成液蒸気が露結しない程度に加熱する
ことを特徴とする電解コンデンサの製造方法。1 A capacitor element made of a metal member having a valve action is suspended from a band-shaped metal plate via a metal wire, and when the capacitor element is immersed in a chemical liquid for chemical conversion treatment, the chemical liquid vapor condenses on the metal plate. A method for manufacturing an electrolytic capacitor, which is characterized by heating it to an extent that it does not heat up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3094276A JPS5845808B2 (en) | 1976-03-22 | 1976-03-22 | Manufacturing method of electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3094276A JPS5845808B2 (en) | 1976-03-22 | 1976-03-22 | Manufacturing method of electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS52114957A JPS52114957A (en) | 1977-09-27 |
| JPS5845808B2 true JPS5845808B2 (en) | 1983-10-12 |
Family
ID=12317722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3094276A Expired JPS5845808B2 (en) | 1976-03-22 | 1976-03-22 | Manufacturing method of electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5845808B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4891186B2 (en) * | 2007-09-21 | 2012-03-07 | ニチコン株式会社 | Manufacturing method of solid electrolytic capacitor |
-
1976
- 1976-03-22 JP JP3094276A patent/JPS5845808B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS52114957A (en) | 1977-09-27 |
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