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Patent Searching and Data


Title:
SOLID-STATE ELECTROLYTIC CAPACITOR AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPH0677093
Kind Code:
A
Abstract:

PURPOSE: To produce a solid-state electrolytic capacitor excellent in characteristics by a method wherein conductive high molecular material soluble in solvent is used as a pre-electrode layer and doped with dopant, and a conductive layer of polypyrrole or the like is made to grow making the doped high molecular material serve as seed.

CONSTITUTION: The surface of a valve metal 1 is anodized to form an oxide film 2, polyaniline is applied thereon and dried up for the formation of a pre- electrode layer 3, and the electrode layer 3 is enhanced in conductivity by doping. Thereafter, a conductive high molecular material (polypyrrole, polythiophene) film 4 is formed on the pre-electrode layer 3 through electrolytic polymerization making the pre-electrode layer 3 serve as an anode, and the high molecular material film 4 is made to serve as a cathode of a capacitor. By this setup, a pre-electrode layer can be easily and surely obtained as compared with a conventional process. As the pre-electrode layer is low in resistance, a capacitor of this design can be enhanced in characteristics and performance and lessened in size.


Inventors:
TAKEI FUMIO
SHIRATO HIRONORI
KIKUCHI KAZUJI
Application Number:
JP1992000227235
Publication Date:
March 18, 1994
Filing Date:
August 26, 1992
Export Citation:
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Assignee:
FUJITSU LTD
International Classes:
H01G9/028; H01G9/02; (IPC1-7): H01G9/02
Attorney, Agent or Firm:
Aoki Akira (2 outside)