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. 16, 2016
Filed:
Oct. 09, 2014
International Business Machines Corporation, Armonk, NY (US);
National University of Singapore, Singapore, SG;
Charanjit Singh Bhatia, Singapore, SG;
Koashal Kishor Mani Pandey, Singapore, SG;
Nikita Gaur, Singapore, SG;
Siegfried L. Maurer, Stormville, NY (US);
Ronald W. Nunes, East Falmouth, MA (US);
INTERNATIONAL BUSINESS MACHINES CORPORATION, Armonk, NY (US);
NATIONAL UNIVERSITY OF SINGAPORE, Singapore, SG;
Abstract
A magnetic data storage medium includes an ion doped magnetic recording layer having a continuous grading of coercivity or anisotropy. The medium also includes an ion-doped overcoat having an ion density that is at a maximum substantially at the interface with the recording layer and has a continuous grading of ion density between the overcoat and the recording layer. The coercivity is at a minimum substantially at the interface.