ALUMINUM FOIL FOR ELECTROLYTIC CAPACITOR ELECTRODE HAVING EXCELLENT ETCHING PROPERTY, PRODUCTION METHOD THEREFOR, AND METHOD OF PRODUCING ALUMINUM ETCHED FOIL FOR ELECTROLYTIC CAPACITOR ELECTRODE

摘要

PPROBLEM TO BE SOLVED: To increase effective area in aluminum foil for an electrolytic capacitor electrode, and to further increase capacitance. PSOLUTION: In the aluminum foil for an electrolytic capacitor electrode having excellent etching properties, a hydrated oxide film essentially consisting of aluminum oxide monohydrate (AlSB2/SBOSB3/SB-HSB2/SBO), or aluminum oxide trihydrate (AlSB2/SBOSB3/SB-3HSB2/SBO), or their mixture is formed on the surface of an aluminum foil base material in the weight of 0.02 to 0.1 g/mSP2/SP. PCOPYRIGHT: (C)2003,JPO