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:
Jul. 19, 1994
Filed:
Aug. 19, 1991
Applicant:
Inventors:
Dieter Hofmann, Bruchkobel, DE;
Bernd Hensel, Frankfurt, DE;
Assignee:
Leybold AG, Hanau 1, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
428697 ; 428212 ; 428336 ; 428698 ; 428699 ; 51295 ; 51307 ; 407117 ;
Abstract
Surface coating includes alternating first and second ternary layers, wherein the first layer TiAlN.sub.x has a higher nitrogen content and is considerably thinner than the second layer TiAlNy. The first layer is preferably applied by decreasing the nitrogen content of a reactive atmosphere from a maximum to a minimum during sputtering of a TiAl target. The second layer is then applied by sputtering the TiAl target over a longer period of time while the nitrogen content is maintained constant at the minimum. When a further first layer is applied, the nitrogen is again increased to the maximum.