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. 12, 2012
Filed:
Jul. 12, 2007
Juergen Ramm, Maienfeld, CH;
Beno Widrig, Bad Ragaz, CH;
Christian Wohlrab, Feldkirch, AT;
Oerlikon Trading AG, Truebbach, Truebbach, CH;
Abstract
A method for producing a low-conductivity layer on at least one workpiece by vacuum coating is provided. The method includes operating an electrical arc discharge between an anode and a cathode of an arc source in an atmosphere containing a reactive gas. A small external magnetic field is generated to be essentially perpendicular to a target surface of a target, which is electrically connected to the cathode, to assist an evaporation process. A degree of recoating of the target surface by other coating sources in a vacuum coating installation is less than 10%, and the magnetic field is generated by a magnet system with an axially-polarized coil having a geometry similar in size to that of the target. Excitation current for the electrical arc discharge is supplied through the axially-polarized coil.