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:
Dec. 08, 1981
Filed:
Jan. 18, 1980
Herbert Forster, Schorndorf, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To decrease the thickness of plastic foil capacitors using, for example, polycarbonate or polypropylene foils, and permit full utilization of the dielectric strength of the dielectric material without degradation of the electrode layer applied thereto, the electrode layer, typically of aluminum or zinc, has an additive of at least one of the metals Al, Ni, Mg, Ti, Hf, Be, Bi therein, present for example as an intermetallic compound, in a quantity of from 0.5 to 10%, preferably 2 to 5% (by weight). The electrode can be applied as a vapor-deposited coating, in which the additive is uniformly distributed. The previously observed decomposition of the electrode coating under applied voltages is thereby effectively prevented. Thus, the full dielectric strength of the dielectric material is utilized, resulting in a smaller and less expensive capacitor.