Patent Number: 6,168,706

Title: Process for producing high etch gains for electrolytic capacitor manufacturing

Abstract: Aluminum anode foil is etched using a process of treating the foil in an electrolyte bath composition comprising aluminum chloride hexahydrate, hydrochloric acid, sulfuric acid and perchloric acid or perchlorate. The anode foil is etched in the electrolyte bath composition by passing a direct current (DC) through the bath, resulting in an aluminum anode foil having a higher capacitance and/or metal strength than using known methods or etching compositions. The etched anode foil is suitable for use in an electrolytic capacitor.

Inventors: Hemphill; Ralph Jason (Liberty, SC), Strange; Thomas Flavian (Easley, SC)

Assignee: Pacesetter, Inc.

International Classification: C25F 3/00 (20060101); C25F 3/04 (20060101); H01G 9/04 (20060101); C25F 003/02 ()

Expiration Date: 01/02/2018