The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2021
Filed:
Dec. 07, 2017
Nippon Light Metal Company, Ltd., Tokyo, JP;
Yuta Shimizu, Shizuoka, JP;
Shuhei Enoki, Shizuoka, JP;
Masahiko Katano, Shizuoka, JP;
Toshifumi Taira, Osaka, JP;
Kazuya Fujimoto, Osaka, JP;
Shinya Sone, Osaka, JP;
NIPPON LIGHT METAL COMPANY, LTD., Tokyo, JP;
Abstract
A method for producing an electrode for an aluminum electrolytic capacitor is provided that can reduce defects in a chemical formation film formed at a chemical formation voltage of 500 V or higher. For producing the electrode for an aluminum electrolytic capacitor, an aluminum electrode is brought into contact with pure water having a temperature of 70° C. or higher to form a hydrated film having a suitable film thickness on the aluminum electrode at a hydration step, and then chemical formation is performed thereon at a chemical formation voltage of 500 V or higher in a chemical formation solution having a temperature of 40° C. or higher at a chemical formation step. At the chemical formation step, when the relative velocity of the chemical formation solution to the aluminum electrode is represented by a three-dimensional velocity vector B−A and the absolute value of the velocity vector B−A is represented by |B−A|, the absolute value |B−A| of the velocity vector satisfies the following conditional formula.3 cm/s≤||≤100 cm/s