ALUMINUM ALLOY FOIL FOR CATHODE OF ELECTROLYTIC CAPACITOR

Title:

ALUMINUM ALLOY FOIL FOR CATHODE OF ELECTROLYTIC CAPACITOR

Document Type and Number:

Japanese Patent JP2001294960

Kind Code:

A

Abstract:

To provide aluminum alloy foil applied to the cathode foil of an electrolytic capacitor having high capacitance.

This aluminum alloy foil has a composition containing 100 to 500 ppm Si, 200 to 750 ppm Fe, 20 to 100 ppm Mg, 50 to 120 ppm Zn, ≤30 ppm Cu, either or both of Mn and Cr by 40 to 200 ppm in total, other inevitable impurities of ≤20 ppm, and the residual Al, and, in particular, Mn and/or Cr is added to the foil by 40 to 200 ppm. The aluminum alloy foil has high tensile strength and, at the time of processing a capacitor, is little in trouble, such as cutting and has good workability. Moreover, the aluminum alloy foil has good etching characteristics, in which the cathode foil of an electrolytic capacitor having high capacitance can be obtained.

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Inventors:

SAITO TOSHIO
YAMAMOTO KANESHIGE
KATAOKA TSUGIO

Application Number:

JP2000109111A

Publication Date:

October 26, 2001

Filing Date:

April 11, 2000

Export Citation:

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Assignee:

NIPPON FOIL MFG

International Classes:

C22C21/00; H01G9/04; H01G9/042; (IPC1-7): C22C21/00; H01G9/04; H01G9/042

Domestic Patent References:

JPH0413828A	1992-01-17
JPH0251210A	1990-02-21

Attorney, Agent or Firm:

Okumura Shigeki

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