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:
Mar. 02, 2004
Filed:
Mar. 01, 2002
Mitsutoshi Honda, Hitachi, JP;
Hiroki Yamamoto, Hitachi, JP;
Takashi Naito, Mito, JP;
Tatsumi Hirano, Hitachinaka, JP;
Tetsuo Nakazawa, Tomobe, JP;
Fumiyoshi Kirino, Tokyo, JP;
Teruaki Takeuchi, Moriya, JP;
Akira Yano, Moriya, JP;
Nobuyuki Inaba, Hasuda, JP;
Satoshi Matsunuma, Kamakura, JP;
Hitachi Maxell, Ltd., Ibaraki, JP;
Abstract
An amorphous magnetic recording medium comprising a substrate and an amorphous magnetic layer, where a magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical phases vertically stacked one upon another in the main phase is formed on the top side or the bottom side directly or through at least one of other layers to bring the amorphous magnetic layer into a finer magnetic domain structure, can satisfy high density recording.