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:
Sep. 21, 1993
Filed:
Jun. 01, 1992
Hans Schulz, Balzers, LI;
Helmut Daxinger, Wangs, CH;
Erich Bergmann, Mels, CH;
Jurgen Ramm, Flaesch, CH;
Balzers Aktiengesellschaft, Liechtenstein, LI;
Abstract
A coated tool or instrument has a wear-resistant hard coating (7) which is preferably titanium nitride for working organic material which is disposed on a separating layer (9) applied on a basic body (3). The separating layer (9) comprises a ceramic electrically non-conducting material. Such a material is preferably an oxide, nitride or oxynitride of silicon. The separating layer (9) protects the basic body (3) of the tool or instrument of e.g. a non-corrosion resistant steel. During the coating of the basic body (3) with the ceramic material, a pulsating dc voltage is applied to the basic body (3) or its holders. The pulse height is changed during the vapor deposition from high negative values to low negative values.