Electrode for aluminum electrolytic capacitor and method for manufacturing same

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11626257
APP PUB NO 20200227209A1
SERIAL NO

16634188

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Abstract

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When manufacturing an electrode for an electrolytic capacitor, in a first hydration step (ST1), an aluminum electrode is immersed in a first hydration processing solution having a temperature of at least 70° C. and comprising pure water or an aqueous solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is no greater than 4 mass ppm. In a second hydration step (ST2), the aluminum electrode is immersed in a second hydration processing solution to which phosphoric acid or a phosphate has been added so that the phosphorus concentration is 4-5000 mass ppm, the second hydration processing solution having a pH of 3.0-9.0 and a temperature of at least 70° C. In a chemical conversion step (ST3), at least a boric acid chemical conversion process in which the aluminum electrode is chemically converted in a boric acid-based chemical conversion solution is included, and a chemical conversion coating having a coating withstand voltage of at least 200 V is formed on the aluminum electrode.

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Patent Owner(s)

Patent OwnerAddress
NIPPON LIGHT METAL COMPANY LTD2-20 HIGASHI-SHINAGAWA 2-CHOME SHINAGAWA-KU TOKYO 140-8628
TOYO ALUMINIUM K KJAPAN OSAKA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Enoki, Shuhei Shizuoka, JP 3 4
Fujimoto, Kazuya Osaka, JP 21 112
Katano, Masahiko Shizuoka, JP 12 16
Shimizu, Yuta Shizuoka, JP 47 62
Sone, Shinya Osaka, JP 9 10
Taira, Toshifumi Osaka, JP 20 68

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