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. 03, 2004
Filed:
Jun. 04, 2001
Applicant:
Inventors:
Hiroshi Sakakima, Kyoto, JP;
Hideaki Adachi, Osaka, JP;
Mitsuo Satomi, Osaka, JP;
Yasuhiro Kawawake, Kyoto, JP;
Yasunari Sugita, Osaka, JP;
Kenji Iijima, Kyoto, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/66 ; G11B 5/70 ; H01J 1/00 ;
U.S. Cl.
CPC ...
G11B 5/66 ; G11B 5/70 ; H01J 1/00 ;
Abstract
A magnetic recording medium includes a magnetic film for signal recording and a film containing M O as a main component that is magnetically exchange-coupled to the magnetic film to increase the effective V and Ku of the magnetic film and to suppress thermal fluctuation. Herein, M is at least one element selected from Fe, Co, Ni, alkaline earth elements, Y, lanthanoids and Bi and includes at least one selected from Fe, Co and Ni as an essential element, and y is a value satisfying 2.8<y<3.2.