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:
May. 17, 2005
Filed:
Oct. 30, 2000
Fumiyoshi Kirino, Suginami, JP;
Norio Ohta, Yawara-mura, JP;
Kouichirou Wakabayashi, Toride, JP;
Teruaki Takeuchi, Moriya, JP;
Harumi Hieida, Moriya, JP;
Masaki Sekine, Moriya, JP;
Hiroyuki Awano, Chiba, JP;
Akira Yano, Moriya, JP;
Satoshi Matsunuma, Kamakura, JP;
Nobuyuki Inaba, Hasuda, JP;
Tetsunori Koda, Moriya, JP;
Fumiyoshi Kirino, Suginami, JP;
Norio Ohta, Yawara-mura, JP;
Kouichirou Wakabayashi, Toride, JP;
Teruaki Takeuchi, Moriya, JP;
Harumi Hieida, Moriya, JP;
Masaki Sekine, Moriya, JP;
Hiroyuki Awano, Chiba, JP;
Akira Yano, Moriya, JP;
Satoshi Matsunuma, Kamakura, JP;
Nobuyuki Inaba, Hasuda, JP;
Tetsunori Koda, Moriya, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagnetic film is composed of a magnetic material which has saturation magnetization larger than that of the information-recording film. Accordingly, the leak magnetic flux from the ferromagnetic film is larger than that from the information-recording film. The magnetic recording medium and a magnetic recording apparatus are obtained, which are excellent in thermal stability and which are preferred to perform super high density recording.