JPS6328029A - Solid electrolytic capacitor - Google Patents
Solid electrolytic capacitorInfo
- Publication number
- JPS6328029A JPS6328029A JP17124586A JP17124586A JPS6328029A JP S6328029 A JPS6328029 A JP S6328029A JP 17124586 A JP17124586 A JP 17124586A JP 17124586 A JP17124586 A JP 17124586A JP S6328029 A JPS6328029 A JP S6328029A
- Authority
- JP
- Japan
- Prior art keywords
- anode lead
- solid electrolytic
- lead wire
- electrolytic capacitor
- sintered body
- 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 description 26
- 239000007787 solid Substances 0.000 title claims description 14
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 24
- 239000003792 electrolyte Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims 1
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 4
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 3
- 241000723346 Cinnamomum camphora Species 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 3
- 229960000846 camphor Drugs 0.000 description 3
- 229930008380 camphor Natural products 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052715 tantalum Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
- Glass Compositions (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は各種電子機器に利用される固体電解コンデンサ
に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to solid electrolytic capacitors used in various electronic devices.
従来の技術
固体電解コンデンサは小型、大容量であるという特徴を
有しており、最近の電子機器の小型化の動向には非常に
適し几コンデンサであシ、最近は特にテップタイプの需
要が旺盛であり民生機器は勿論のこと自動車、コンピュ
ータへと需要は拡大しつつある。Conventional technology Solid electrolytic capacitors are characterized by their small size and large capacity, making them extremely suitable for the recent trend toward miniaturization of electronic devices.Recently, demand for tip type capacitors is particularly strong. Demand is expanding not only for consumer electronics, but also for automobiles and computers.
これまでの固体電解コンデンサ用多孔質焼結体は第４図
に示すように外周表面のどの部分においても同じ表面状
態を有する多孔質焼結体であった。As shown in FIG. 4, conventional porous sintered bodies for solid electrolytic capacitors have the same surface condition at all parts of the outer peripheral surface.
即ち弁作用を有する微細なタンタル金属粉末にバインダ
ーとしてカンファーを混合し、此れを一定形状の金型に
いれ、予め用意した一定線径のタンタルなどの陽極導出
線１の一部が埋設するようプレス成形して多孔質成形体
２を得る。That is, camphor is mixed as a binder with fine tantalum metal powder having a valve action, and this is put into a mold of a certain shape, so that a part of the anode lead wire 1 prepared in advance, such as tantalum or the like, with a certain wire diameter is embedded. A porous molded body 2 is obtained by press molding.
その後、多孔質成形体２ ｆ １０’−１０−６Ｔｏｒ
ｒの真空中で１４００−２０００°Ｃの焼結をおこない
コンデンサ用の多孔質焼結体としていた。これに誘電体
性の酸化被膜を形成させ、更に、この上面に硝酸マンガ
ン溶液の熱分解反応により二酸化マンガンなどの電解質
層を形成させ、順次、カーボン層、陰極層などを形成さ
せてコンデンサ素子とし、この陽極導出線１に外部陽極
端子を接続し、更には外部陰極端子を接続し、その後樹
脂外装をし固体電解コンデンサを得ていた。After that, the porous molded body 2 f 10'-10-6 Tor
A porous sintered body for a capacitor was obtained by sintering at 1400-2000°C in a vacuum of 30°C. A dielectric oxide film is formed on this, and an electrolyte layer such as manganese dioxide is formed on the top surface by a thermal decomposition reaction of a manganese nitrate solution, and a carbon layer, a cathode layer, etc. are sequentially formed to form a capacitor element. An external anode terminal and an external cathode terminal were connected to this anode lead wire 1, and then the capacitor was covered with resin to obtain a solid electrolytic capacitor.
発明が解決しようとする問題点
しかしながら、このような従来の構成の固体電解コンデ
ンサ用焼結体では、二酸化マンガンが陽極導出線１の引
だし根本部まで這い上がり、後の製造工程での処理時の
機械的振動、及び組立時のコンデンサ素子の陽極導出線
１を陽極外部端子に接続するときの溶接時の振動、曲り
などの物理的。Problems to be Solved by the Invention However, in the conventional sintered body for solid electrolytic capacitors, manganese dioxide creeps up to the base of the anode lead wire 1 and is removed during processing in the subsequent manufacturing process. mechanical vibrations, and physical vibrations and bending during welding when connecting the anode lead wire 1 of the capacitor element to the anode external terminal during assembly.
機械的ストレスが加わるため、陽極導出線１の引だし根
本部にストレスが集中して誘電体酸化皮膜を破壊させ存
在する二酸化マンガンとの接触が起るためコンデンサの
漏れ電流を増大させるなどの欠点を有していた。又、完
成され九コンデンサとしても高温度環境下に晒されると
洩れ電流が増大する欠点をも有していた。As mechanical stress is applied, stress concentrates on the root of the anode lead wire 1, which destroys the dielectric oxide film and causes contact with existing manganese dioxide, resulting in increased leakage current of the capacitor. It had Furthermore, even when the completed capacitor is used, it has the disadvantage that leakage current increases when exposed to a high temperature environment.
問題点を解決するための手段
この欠点を解決するために本発明は多孔質焼結体の陽極
導出線引だし面の上面をレーザ光線により溶融して内部
より表面に繋がる空孔部を無くするように粒子間の溶融
を行った溶融部を設ける構成としたものである。Means for Solving the Problems In order to solve this drawback, the present invention melts the upper surface of the anode lead wire drawing surface of the porous sintered body with a laser beam to eliminate the voids that connect from the inside to the surface. The structure is such that a melting section is provided in which particles are melted as shown in FIG.
作用
この構成により二酸化マンガンが陽極導出線の引だし根
本部まで這いあがらず、また表面の粒子間の結合が強く
なるため多孔質体と陽極導出線の接続強度が高くなるの
で振動、曲りなどの物理的。Effect: This structure prevents manganese dioxide from creeping up to the root of the anode lead wire, and also strengthens the bonds between the particles on the surface, increasing the connection strength between the porous body and the anode lead wire, thereby preventing vibrations, bending, etc. Physical.
機械的ストレスが加わって根本部の誘電体酸化被膜に欠
陥が生じてもそこに電解質である二酸化マンガンが存在
しないので洩れ電流には影響しなくなり又、根本部に少
々のストレスが加わってもコンデンサの洩れ電流が増大
しない。Even if a defect occurs in the dielectric oxide film at the base due to mechanical stress, there is no manganese dioxide, which is an electrolyte, so it will not affect the leakage current, and even if a small amount of stress is applied to the base, the capacitor will fail. leakage current does not increase.
実施例
第１図、第２図は本発明の一実施例であり、弁作用を有
する微細なタンタル金属粉末にバインダーとしてカンフ
ァーを混合し、これを一定形状の金型にいれ、予め用意
した陽極導出線３の一部が粉末のほうに埋設するようプ
レス成形して多孔質成形体を得る。Embodiment Figures 1 and 2 show an embodiment of the present invention, in which camphor is mixed as a binder with fine tantalum metal powder having a valve action, this is put into a mold of a certain shape, and the anode prepared in advance is mixed with camphor as a binder. Press molding is performed so that a part of the lead wire 3 is buried in the powder to obtain a porous molded body.
その後、多孔質成形体を１０ −１０ ＴＯｒｒの真
空中で１４００−２０００”Ｃの焼結をおこないコンデ
ンサ用の多孔質焼結体４とする。陽極導出線３が電極全
体を支えるので金属粉末部と陽極導出線とは強固に接続
されなければならない。Thereafter, the porous molded body is sintered at 1400-2000"C in a vacuum of 10 -10 Torr to form a porous sintered body 4 for a capacitor. Since the anode lead wire 3 supports the entire electrode, the metal powder part and the anode lead-out wire must be firmly connected.
そのために陽極導出線３を引だしている根本部を中心に
して多孔質焼結体４の上・面に炭酸ガスレーザーを照射
することによって表面部の各粒子間の隙間が無くなるよ
うに溶融部５を形成する。For this purpose, a carbon dioxide laser is irradiated onto the top and surface of the porous sintered body 4, centering on the root part from which the anode lead wire 3 is drawn out, so that the molten part is removed so that there are no gaps between the particles on the surface. form 5.
溶融する領域は陽極導出線３の引だし面の表面全域でも
よいが陽極導出線３を中心にしてその周囲が陽極導出線
３０半径の３倍半径以上の領域に溶融部６を形成すれば
二酸化マンガンの這い上がりを十分防止できると共に多
孔質焼結体４と陽極導出線３との強度を確保することが
できる。The area to be melted may be the entire surface of the drawing surface of the anode lead wire 3, but if the molten part 6 is formed in an area centered around the anode lead wire 3 and whose circumference is three times the radius or more of the radius of the anode lead wire 30, carbon dioxide will be generated. It is possible to sufficiently prevent manganese from creeping up, and to ensure the strength of the porous sintered body 4 and the anode lead wire 3.
すなわち、実験結果から弁作用金属がタンタルの場合、
陽極導出線３を中心にしてその周囲が陽極導出線３の半
径の３倍半径以上あればよいことを究明した。陽極導出
線３は埋設するように設けなくともよく、陽極導出線３
の引だし面に予めレーザー照射により溶融部６を形成し
ておき、その後陽極導出線３を溶接してもよい。第３図
ａ、ｂにそれを示す。In other words, from the experimental results, if the valve metal is tantalum,
It has been found that the radius around the anode lead-out line 3 should be at least three times the radius of the anode lead-out line 3. The anode lead wire 3 does not have to be buried, and the anode lead wire 3
The fused portion 6 may be formed in advance on the drawing surface by laser irradiation, and then the anode lead wire 3 may be welded. This is shown in Figures 3a and 3b.
このような多孔質焼結体４には誘電体性の酸化皮膜６を
形成し、その上に二酸化マンガンなどの電解質層７を形
成し、その上にカーボン層８．陰極層９を形成してコン
デンサ素子とし、上記陽極導出線３にＬ字状の外部陽極
端子１ｏを溶接などで接続し、陰極層９に外部陰極端子
１１を半田１２などで接続し、上記外部陽極端子１ｏ、
外部陰極端子１１の一部を表出させるように全体を樹脂
外装置３で被って固体電解コンデンサとしている。A dielectric oxide film 6 is formed on such a porous sintered body 4, an electrolyte layer 7 such as manganese dioxide is formed thereon, and a carbon layer 8 is formed thereon. A cathode layer 9 is formed to form a capacitor element, an L-shaped external anode terminal 1o is connected to the anode lead wire 3 by welding or the like, an external cathode terminal 11 is connected to the cathode layer 9 by solder 12, etc. Anode terminal 1o,
The entire structure is covered with a resin outer device 3 so that a part of the external cathode terminal 11 is exposed, thereby forming a solid electrolytic capacitor.
発明の効果
以上のような本発明の多孔質焼結体を陽極に用いること
により次のような効果が得られる。Effects of the Invention By using the porous sintered body of the present invention as described above for an anode, the following effects can be obtained.
１）コンデンサの電気的特性である洩れ電流の非常に小
さな安定な固体電解コンデンサを得ることができる。1) A stable solid electrolytic capacitor with extremely small leakage current, which is an electrical characteristic of a capacitor, can be obtained.
２）製造歩留が大巾に向上する。2) Manufacturing yield will be greatly improved.
３）熱衝撃に優れた耐熱性の固体電解コンデンサが得ら
れる。3) A heat-resistant solid electrolytic capacitor with excellent thermal shock resistance can be obtained.
第１図は本発明の固体電解コンデンサの一実施例を示す
断面図、第２図は同コンデンサに用いる多孔質焼結体の
斜視図、第３図ａ、ｂは他の実施例における多孔質焼結
体と陽極導出線の接続工程を示す斜視図、第４図は従来
の固体電解コンデンサの多孔質焼結体の斜視図である。
３・・・・・・陽極導出線、４・・・・・・多孔質焼結
体、６・・・・・・溶融部、６・・・・・・誘電体性の
酸化皮膜、７・・・・・電解質層、８・・・・・・カー
ボン層、９・・・・・・陰極層、１０・・・・・・外部
陽極端子、１１・・・・・・外部陰極端子、１３・・・
・・・樹脂外装。
第１図Figure 1 is a sectional view showing one embodiment of the solid electrolytic capacitor of the present invention, Figure 2 is a perspective view of a porous sintered body used in the same capacitor, and Figures 3a and b are porous sintered bodies in other embodiments. FIG. 4 is a perspective view showing a process of connecting the sintered body and the anode lead wire, and FIG. 4 is a perspective view of a porous sintered body of a conventional solid electrolytic capacitor. 3... Anode lead wire, 4... Porous sintered body, 6... Melt part, 6... Dielectric oxide film, 7... ... Electrolyte layer, 8 ... Carbon layer, 9 ... Cathode layer, 10 ... External anode terminal, 11 ... External cathode terminal, 13 ...
...Resin exterior. Figure 1
Claims (3)
体の陽極導出線の引だし面である上面をレーザ光線によ
り溶融して、内部より表面に繋がる空孔部を無くするよ
うに粒子間の溶融を行った溶融部を設け、この孔質焼結
体に誘電体性酸化皮膜、電解質層、カーボン層、陰極層
を設け、上記陽極導出線に外部陽極端子を、陰極層に外
部陰極端子を接続し、全体を樹脂外装で被ってなる固体
電解コンデンサ。(1) The upper surface of the porous sintered body made of molded and sintered metal powder with valve action is melted with a laser beam, which is the leading surface of the anode lead wire, to eliminate the voids that connect from the inside to the surface. A fusion zone in which particles are fused is provided, a dielectric oxide film, an electrolyte layer, a carbon layer, and a cathode layer are provided on this porous sintered body. A solid electrolytic capacitor whose cathode terminals are connected and the entire body is covered with a resin exterior.
半径の３倍半径以上の領域に溶融部を形成した特許請求
の範囲第１項記載の固体電解コンデンサ。(2) The solid electrolytic capacitor according to claim 1, wherein the molten portion is formed in a region centered around the anode lead-out wire and whose circumference is at least three times the radius of the anode lead-out wire.
成した溶融部に陽極導出線を溶接した特許請求の範囲第
１項記載の固体電解コンデンサ。(3) The solid electrolytic capacitor according to claim 1, wherein the anode lead wire is welded to a fused portion formed in advance by laser irradiation on the anode lead wire drawing surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17124586A JPS6328029A (en) | 1986-07-21 | 1986-07-21 | Solid electrolytic capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17124586A JPS6328029A (en) | 1986-07-21 | 1986-07-21 | Solid electrolytic capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6328029A true JPS6328029A (en) | 1988-02-05 |
Family
ID=15919736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17124586A Pending JPS6328029A (en) | 1986-07-21 | 1986-07-21 | Solid electrolytic capacitor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6328029A (en) |
-
1986
- 1986-07-21 JP JP17124586A patent/JPS6328029A/en active Pending
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