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:
Apr. 10, 1990
Filed:
Mar. 06, 1989
Applicant:
Inventors:
Rudolf Baur, Kreuzlingen, CH;
Markus Kern, Kreuzlingen, CH;
Assignee:
Swiss Aluminium Ltd., Chippis, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
21912172 ; 21912184 ;
Abstract
A capacitor foil made of aluminum or an aluminum alloy whose edge has been treated using a LASER beam exhibits practically no burrs or cracks, as a result of which an increase in the nominal field strength of capacitors made with such a foil becomes possible. A further increase in the nominal field strength is achieved by creating at least one edge with a LASER beam which is enclosed in a reactive gas or gas mixture having a concentration of oxygen greater than the concentration of oxygen in air.