Patent · US Expired

Electrolytic capacitors with a polymeric outer layer

US6987663B2 · kind B2 · utility

174Cited by

5References

30Claims

0Family size

Assignee

H.C. STARCK INC. · US

Inventors

Udo Merker
Klaus Wussow · Netphen, DE
Friedrich Jonas · Aachen, DE

Key dates

Filing date	Oct 13, 2004
Grant date	Jan 17, 2006
Priority date	—
Expiry date	Oct 14, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/13
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Electrolytic capacitors having low equivalent series resistance and low leakage current are described. The electrolytic capacitors include a solid electrolyte layer of a conductive material in particular a conductive polymer, and an outer layer that includes binders, polymeric anions and conductive polymers (e.g., polythiophenes). Also described is a method of preparing electrolytic capacitors that involves forming the conductive polymer of the solid electrolyte layer in situ by means of chemical oxidative polymerization or electrochemical polymerization. Electronic circuits that include the electrolytic capacitors are also described.

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