| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of borming an electrode foil for an aluminum electrolytic capacitor which enables increase in electrostatic capacitance and reduction in leakage current. SOLUTION: A first formation bath 1 containing an adipic acid formation solution, a second formation bath 2 containing a boric acid formation solution, and a third formation bath 3 containing a phosphoric acid formation solution are combined in that order. At least one or more types of this combination are provided, and formation of an etched aluminum electrode foil is performed by using these formation baths 1, 2 and 3. The same formation voltage is applied to the three formation baths 1, 2 and 3 which form one combination. |
