Title:
MANUFACTURE OF SOLID ELECTROYTIC CAPACITOR
Document Type and Number:
Japanese Patent JP3119604
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a solid electrolytic capacitor in which a leakage current is reduced, by a method wherein a mixed solvent of water and alcohol or that of water and ketone is used as a chemical reconversion solution for chemical reconversion.
SOLUTION: A sintered compact 2 in which a tantalum lead wire 1 is buried and which is pressed and molded is anodized, a dielectric film 3 is formed, and a pellet is manufactured. Then, a chemical oxidation and polymerization operation is performed, and a conductive polymer polypyrrole layer 4 is formed on the dielectric film 3. After that, the concentration of phosphoric acid in a chemical reconversion solution 9 is adjusted, methanol in 30 to 50 vol.% is added, a voltage is applied to the pellet, and a chemical reconversion operation is performed. In addition, an acid such as adipic acid, boric acid, acetic acid or the like may be used instead of the phosphoric acid. In addition, as alcohol for the chemical reconversion solution, methanol is used, but any out of ethyl alcohol, butyl alcohol and ethylene glycol may be used.
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Inventors:
Kenji Araki
Tomoji Arai
Yuji Aoki
Kenichi Takahashi
Takashi Fukami
Tomoji Arai
Yuji Aoki
Kenichi Takahashi
Takashi Fukami
Application Number:
JP23605197A
Publication Date:
December 25, 2000
Filing Date:
September 01, 1997
Export Citation:
Assignee:
Toyama NEC Corporation
International Classes:
H01G9/028; H01G9/00; H01G9/02; H01G9/025; H01G9/04; H01G9/15; (IPC1-7): H01G9/04; H01G9/028
Domestic Patent References:
| JP6474713A | ||||
| JP53118760A | ||||
| JP5121275A | ||||
| JP50100570A |
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)