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:
Mar. 27, 2001
Filed:
Sep. 04, 1998
Yasuo Kudoh, Yokohama, JP;
Kenji Akami, Atsugi, JP;
Toshikuni Kojima, Kawasaki, JP;
Yasue Matsuya, Sagamihara, JP;
Hiroshi Shimada, Kyoto, JP;
Chiharu Hayashi, Osaka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A solid electrolytic capacitor comprising comprises a pair of electrodes, and a dielectric film provided between the paired electrodes wherein at least one of the paired electrodes comprising a first conductive polymer layer which is made of a polymer of a member selected from the group consisting of pyrrole and derivatives thereof, the first conductive polymer layer being doped with a mixed dopant of a polyvalent anion and a monovalent anion consisting of a sulfonate ion dissociated from an anionic surface active agent. The conductive polymer layer may have a double-layered or a multi-layered structure wherein a second and/or third conductive polymer layer is made of a doped polymer of a thiophene derivative. A method for making the capacitors are also described.