Method of manufacturing aluminum foil for aluminum electrolytic capacitor
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United States of America Patent
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Aug 1, 2000
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N/A
app pub date -
Jul 14, 1998
filing date -
Jul 25, 1997
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Abstract
An inventive method of preparing an aluminum foil used in a high voltage aluminum electrolytic capacitor is disclosed. The method involves: (a) immersing an aluminum foil in a first forming solution, (b) applying a first voltage to said aluminum foil immersed in said first forming solution, (c) immersing said aluminum foil to which said first voltage is applied in a second forming solution, without passing current, and (d) applying a second voltage to said aluminum foil immersed in said second forming solution. Also disclosed is an aluminum foil that renders an electrolytic capacitor having properties of both high electrostatic capacity and small leak current.
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