摘要 |
PROBLEM TO BE SOLVED: To provide an electrolytic capacitor which has low impedance characteristic can be used in 100V specification, and high reliability at 125 deg.C. SOLUTION: An electrolyte where a quaternary cyclic amidinum salt of benzoic acid is dissolved in a mixed solvent ofγ-butyrolactone and ethylene glycol, and colloidal silica, alkyl phosphoric acid having a 3-8C alkyl group and oxidizing agent are added is used as electrolyte of an electrolytic capacitor. An insulating synthetic resin layer is formed on a contact part with the sealing member of a cathode lead-out means or a contact part with a sealing of a rivet of a cathode side, especially on these lod parts or a surface of a cathode lead-out terminal, so that an electrolytic capacitor which has low impedance characteristic, stability of breakdown voltage characteristic or the like at 125 deg.C and satisfactory liquid leakage characteristic and can be used in 100V specification can be obtained.
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