ETCHING METHOD

The etching method for the manufacture of an electrode foil of an aluminium electrolytic condenser comprises (a) pretreating an aluminium foil of 90 m thickness in an aqueous 2 wt.% phosphoric acid solution, (b) etching the preptreated foil in an aqueous 6 wt.% hydrochloric acid and 1.5 wt.% phospho...

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Bibliographic Details
Main Author SHIN, JUNG - CHOL
Format Patent
LanguageEnglish
Published 12.12.1992
Edition5
Subjects
BASIC ELECTRIC ELEMENTS
CAPACITORS
CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
ELECTRICITY
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Summary:The etching method for the manufacture of an electrode foil of an aluminium electrolytic condenser comprises (a) pretreating an aluminium foil of 90 m thickness in an aqueous 2 wt.% phosphoric acid solution, (b) etching the preptreated foil in an aqueous 6 wt.% hydrochloric acid and 1.5 wt.% phosphoric acid solution with the electric power source of a clamped triangular wave, and (c) chemical-treating it in an aqueous ammonium adipate. The etching method gives a high capacitance and a miniature construction for the condenser.
Bibliography:Application Number: KR19900018147