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. 26, 2008
Filed:
May. 04, 2006
Hideaki Fukuzawa, Sagamihara, JP;
Shin-ichi Nakamura, Yokohama, JP;
Yuzo Kamiguchi, Yokohama, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Akio Hori, Kawasaki, JP;
Susumu Hashimoto, Ebina, JP;
Hideaki Fukuzawa, Sagamihara, JP;
Shin-ichi Nakamura, Yokohama, JP;
Yuzo Kamiguchi, Yokohama, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Akio Hori, Kawasaki, JP;
Susumu Hashimoto, Ebina, JP;
Kabushiki Kaisha Toshiba, Kawasaki-shi, JP;
Abstract
A base film of a hard magnetic film containing Co as a structural element has a crystal metal base film such as a Cr film formed on the main surface of a substrate and a reactive base film (mixing layer) formed between the substrate and the crystal metal base film and having a reactive amorphous layer containing a structural element of the substrate and a structural element of the crystal metal base film. A hard magnetic film containing Co as a structural element is formed on the crystal metal base film. With the crystal metal base film such as the Cr film formed on an amorphous layer, a hard magnetic film with a bi-crystal structure can be obtained with high reproducibility. With the hard magnetic film, magnetic characteristics such as coercive force Hc, residual magnetization Mr, saturated magnetization Ms, and square ratio S can be improved without need to use a thick base film. The hard magnetic film containing Co as a structural element is applied to a bias magnetic field applying film of a magnetoresistance effect device and a record layer of a magnetic record medium.