The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2022
Filed:
Feb. 14, 2019
Use of nonafluorobutanesulfonic acid in a low ph etch solution to increase aluminum foil capacitance
Applicant:
Pacesetter, Inc., Sylmar, CA (US);
Inventors:
Ralph Jason Hemphill, Sunset, SC (US);
Timothy R. Marshall, Pickens, SC (US);
Assignee:
Pacesetter, Inc., Sylmar, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F 3/04 (2006.01); C25F 3/02 (2006.01); C25F 3/20 (2006.01); H01G 9/055 (2006.01); H01G 9/00 (2006.01);
U.S. Cl.
CPC ...
C25F 3/04 (2013.01); C25F 3/02 (2013.01); C25F 3/20 (2013.01); H01G 9/0029 (2013.01); H01G 9/0032 (2013.01); H01G 9/055 (2013.01);
Abstract
Anode foil, preferably aluminum anode foil, is etched using a process of treating the foil in an electrolyte bath composition comprising a perfluoroalkylsulfonate, a sulfate, a halide, and an oxidizing agent. The anode foil is etched in the electrolyte bath composition by passing a direct current charge through the bath. The etched anode foil is suitable for use in an electrolytic capacitor.