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:
Feb. 13, 2001
Filed:
Mar. 19, 1999
Takanori Doi, Hatsukaichi, JP;
Kousaku Tamari, Hiroshima, JP;
Yasuo Kakihara, Hiroshima, JP;
Kenichi Nakata, Otake, JP;
Mitsuru Matsuura, Ube, JP;
Setsuo Yamamoto, Ube, JP;
Toda Kogyo Corporation, Hiroshima-ken, JP;
Abstract
A magnetic recording medium of the present invention comprises: a plastic substrate; and a cobalt-containing maghemite thin film formed on said substrate, containing cobalt at a molar ratio of cobalt to iron of not more than 0.06:1, and having either a spacing of a plane (,) of not more than 2.510 Å, a spacing of a plane (,) of not more than 2.415 Å or a spacing of a plane (,) of not more than 2.950 Å; and has a coercive force of not less than 2,000 Oe. Such magnetic recording medium suitably applicable to existent magnetic recording systems using a ring-type magnetic head and capable of using a plastic substrate for providing a magnetic recording medium for high-density recording.