Title: Method for manufacturing aluminum foils used as electrolytic capacitor electrodes
Application Number: 91101672 Application Date: 1991.03.16
Publication Number: 1064963 Publication Date: 1992.09.30
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H01G9/04
Applicant(s) Name: Showa Aluminum Kabushiki Kaisha Address:
Inventor(s) Name: Kiyoshi Taka, Tadao Fujihira
Attorney & Agent: YANG LIQIN
Abstract:
     Aluminum foils uned as a material of electrodes in electrolytic capacitors are manufactured by a method in which a surface portion an aluminium foil is removed at first before the foils are electrochemically or chemically etched later. Then, an initial internal oxide coating 5 to 50 A thick is formed on surface of the aluminum foils from which the surface portion has been removed. Subsequently, the aluminum foils are subjected to high temperature heat treatment such that the whole thickness of the oxide coating does not exceed 70 A.
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