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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.:

US 6020060 B1

PDFFull Text
Date of Patent:
Feb. 01, 2000

Filed:

Mar. 19, 1998

Magnetic recording medium, process for producing the same and magnetic

Applicant:
Inventors:

Yuki Yoshida, Kawasaki, JP;

Chiaki Okuyama, Kawasaki, JP;

Kenji Sato, Kawasaki, JP;

Iwao Okamoto, Kawasaki, JP;

Assignee:

Fujitsu Limited, Kawasaki, JP;

Attorney:

Greer, Burns, and Crain, Ltd

Primary Examiner:

Leszek Kiliman

Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428332 ; 428336 ; 428692 ; 4286 / ; 4286 / ; 4286 / ; 4286 / ; 428 653 ; 428 657 ; 427128 ; 427129 ; 427130 ; 360113 ; 360135 ;
Abstract

A magnetic recording medium characterized by comprising: a nonmagnetic substrate; and, provided on the nonmagnetic substrate in the following order, a first underlayer of a nonmagnetic material composed mainly of chromium, a second underlayer of an antiferromagnetic material, with a body-centered cubic structure, having a Neel temperature of at least 60.degree. C., the second underlayer being such that, when the crystal lattice of the antiferromagnetic material is compared with the crystal lattice in the body-centered cubic structure of the first underlayer, the length of a side of the lattice in the (100) face of the former is approximately equal to the length of a diagonal of the lattice in the (100) face of the latter, permitting the second underlayer to be epitaxially grown onto the first underlayer, and a recording layer of a magnetic material composed mainly of cobalt.

Find Patent Forward Citations

Yoshida, Yuki. (2000). Magnetic recording medium, process for producing the same and magnetic (U.S. Patent No. 6020060). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6020060

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