ALUMINUM ELECTROLYTIC CAPACITOR

PROBLEM TO BE SOLVED: To provide a low-cost and highly reliable aluminum electrolytic capacitor, on which leakage of an electrolyte in hot and humid surroundings can be prevented easily without using a specific butyl rubber hole-sealing material, in a highly mass-productive manner. SOLUTION: One or...

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Bibliographic Details
Main Authors TSUBAKI YUICHIRO, MATSUURA HIROYUKI, OZAKI JUNJI, NITTA YUKIHIRO, HASU MICHIO
Format Patent
LanguageEnglish
Published 08.06.1999
Edition6
Subjects
BASIC ELECTRIC ELEMENTS
CAPACITORS
CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
ELECTRICITY
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Summary:PROBLEM TO BE SOLVED: To provide a low-cost and highly reliable aluminum electrolytic capacitor, on which leakage of an electrolyte in hot and humid surroundings can be prevented easily without using a specific butyl rubber hole-sealing material, in a highly mass-productive manner. SOLUTION: One or more kinds of metals, which are selected from titanium, zirconium, tantal, niobium, zinc, bismuth and their metallic compound in the range of 0.01% or more in total content are contained in the bulk of aluminum foil used for the cathode which constitutes a capacitor element 3. Also, the natural potential in the electrolyte of the aluminum foil to be used for the cathode should be set at 0.50 V or higher against the potential of a saturation calomel electrode.
Bibliography:Application Number: JP19980259868