Title:
MANUFACTURE OF ANODE FOIL FOR ALUMINUM ELECTROLYTIC CAPACITOR
Document Type and Number:
Japanese Patent JP3543694
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a method for manufacturing anode foil for an aluminum electrolytic capacitor in which the effective surface area of aluminum foil is large.
SOLUTION: The method for manufacturing anode foil which is subjected to electrochemical etching comprises at least a first stage of etching, a middle stage of etching and a last stage of etching. In this case, by applying current at the time of the middle stage of etching in two steps in such a way that the current density in the second step is lower than that in the first step, and by repeating these two steps of operation at least twice for performing etching, the pit density in the middle etching stage can be furthermore increased and anode foil for an aluminum electrolytic capacitor exhibiting a large effective surface area of aluminum foil can be obtained.
Inventors:
Toshio Oishi
Shinichi Yamaguchi
Katsuyuki Nakamura
Shinichi Yamaguchi
Katsuyuki Nakamura
Application Number:
JP25705399A
Publication Date:
July 14, 2004
Filing Date:
September 10, 1999
Export Citation:
Assignee:
Matsushita Electric Industrial Co., Ltd
International Classes:
H01G9/04; C25F3/04; H01G9/055; (IPC1-7): H01G9/04; C25F3/04; H01G9/055
Domestic Patent References:
| JP4305911A | ||||
| JP2189912A | ||||
| JP8264391A |
Attorney, Agent or Firm:
Fumio Iwahashi
Tomoyasu Sakaguchi
Hiroki Naito
Tomoyasu Sakaguchi
Hiroki Naito