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. 06, 1999
Filed:
Jun. 25, 1996
Tomoo Yamamoto, Hachioji, JP;
Nobuyuki Inaba, Hasuda, JP;
Masukazu Igarashi, Kawagoe, JP;
Masaaki Futamoto, Kanagawa-ken, JP;
Yuzuru Hosoe, Hino, JP;
Ichiro Tamai, Yokohama, JP;
Emi Mangyo, Kokubunji, JP;
Kazusuke Yamanaka, Kanagawa-ken, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in reliability can be realized by making the magnetic layer of the magnetic recording medium from a mixture comprising at least one non-magnetic compound selected from the group consisting of oxides and nitrides and a magnetic material comprising Co and Pt as main components and specifying the molar ratio of Pt to Co in the magnetic layer, and employing a magnetoresistive read back magnetic recording head.