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:
Aug. 03, 1993
Filed:
Oct. 15, 1992
David A Edmonson, Rochester, MN (US);
Kenneth E Johnson, Rochester, MN (US);
James J Mayerle, Rochester, MN (US);
Arthur C Wall, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
The magnetic properties of a cobalt based, thin film, magnetic recording layer are controlled, independent of controlling the process for depositing the magnetic layer itself, by the introduction of process compatible dopant gases into an argon atmosphere during the vacuum deposition (i.e. a sputtering process or an evaporation process) of a chromium based underlayer upon which the magnetic layer is subsequently deposited. The same or a different dopant may also be introduced into the magnetic layer. The process compatible dopant gases described contain oxygen, nitrogen and/or carbon, and mixtures thereof, and include the group purified air, oxygen, nitrogen, a mixture of oxygen and nitrogen, carbon monoxide, carbon dioxide, methane and water vapor.