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:
Jun. 29, 1993
Filed:
Nov. 21, 1991
Toshikuni Kojima, Zama, JP;
Masao Fukuyama, Kawasaki, JP;
Yasuo Kudoh, Yokohama, JP;
Norishige Nanai, Kanagawa, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A method for fabricating solid electrolytic capacitors which comprises providing a valve metal foil having a dielectric film and a conductive inorganic film formed on the valve metal foil in this order, contacting an electrode for electrolytic polymerization with part of the valve metal foil wherein the electrode is made of a material incapable of undergoing anodization in an electrolytic polymerization solution, subjecting the valve metal foil to electrolytic polymerization by application of a potential between the electrode and a counter electrode to form a conductive polymer film on the conductive inorganic film, and removing the electrode along with the contacted portion of the valve metal foil. At least one conductive paste film may be formed on the conductive polymer film prior to the removal of the electrode. In addition, an insulating film may be formed on an exposed portion of the valve metal foil after the removal of the electrode. A fabrication method of a capacitor unit having at least two capacitor elements is also described.