Patent · US Expired

Capacitor having corrosion inhibitor

US6942819B2 · kind B2 · utility

7Cited by

1References

18Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Thomas Ebel · Stralsund, DE
Frank Stippich · Trochtelfingen, DE
Jürgen Behm · Ulm, DE
Olaf Magnussen · Altenholz, DE
Stefan Lauterborn · Senden, DE

Key dates

Filing date	Mar 23, 2001
Grant date	Sep 13, 2005
Priority date	—
Expiry date	Mar 23, 2021

Classification

Technology area (CPC H)Electricity
CPC primaryH01G9/022
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electrolyte for use with an aluminum electrolyte capacitor includes a glycol/boric acid/borate compound, traces of water, and an inhibitor to suppress corrosion of an aluminum oxide coating of the capacitor. The inhibitor contains a weak organic acid and at least one acid group selected from among carboxylic acid, sulfonic acid, phosphonic acid, and an acidic derivative of carboxylic acid, sulfonic acid, and phosphonic acid.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.