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:
Apr. 12, 2005
Filed:
Dec. 27, 2001
Migaku Takahashi, Sendai-shi, Miyagi-ken, JP;
David Djayaprawira, Sendai, JP;
Kazuya Komiyama, Sendai, JP;
Satoru Yoshimura, Sendai, JP;
Migaku Takahashi, Sendai-shi, Miyagi-ken, JP;
David Djayaprawira, Sendai, JP;
Kazuya Komiyama, Sendai, JP;
Satoru Yoshimura, Sendai, JP;
Other;
Anelva Corporation, Tokyo, JP;
Fuji Electric Co., Ltd., Kanagawa, JP;
Showa Denko K.K., Tokyo, JP;
Abstract
A magnetic recording medium was a high normalized coercive force and superior thermal stability. The magnetic recording medium comprises a non-magnetic base material, and a ferromagnetic metal layer of cobalt based alloy formed on top of this base material with a metal underlayer disposed therebetween, and displays a coercive force Hc of at least 2000 (Oe) and an anisotropic magnetic field Hkof at least 10,000 (Oe). Furthermore, magnetic recording media in which the aforementioned metal underlayer and/or the ferromagnetic metal layer are fabricated in a film fabrication chamber with an ultimate vacuum at the 10Torr level are preferred. A magnetic recording medium according to the present invention can be ideally applied to hard disks, floppy disks, and magnetic tapes and the like.