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. 26, 2016
Filed:
Nov. 24, 2009
Applicants:
Chengjun Sun, Naperville, IL (US);
Donald C. Stafford, San Jose, CA (US);
B. Ramamurthy Acharya, Fremont, CA (US);
Inventors:
Chengjun Sun, Naperville, IL (US);
Donald C. Stafford, San Jose, CA (US);
B. Ramamurthy Acharya, Fremont, CA (US);
Assignee:
WD Media, LLC, San Jose, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/66 (2006.01); G11B 5/73 (2006.01);
U.S. Cl.
CPC ...
G11B 5/66 (2013.01); G11B 5/7325 (2013.01);
Abstract
FePt-based perpendicular magnetic recording (PMR) media including an epitaxial exchanged coupling layer (EECL) between FePtX magnetic recording layers. The degree of exchange coupling may be modulated by the EECL while the texture is transferred between the magnetic recording layers. With an EECL of proper composition and thickness, the FePt-based composite media has high anisotropy field and low saturation magnetic field.