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:
Jul. 14, 2009
Filed:
Sep. 17, 2008
Yuuzo Kamiguchi, Yokohama, JP;
Hiromi Yuasa, Yokohama, JP;
Tomohiko Nagata, Yokohama, JP;
Hiroaki Yoda, Kawasaki, JP;
Katsuhiko Koui, Kawasaki, JP;
Masatoshi Yoshikawa, Yokohama, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Masashi Sahashi, Yokohama, JP;
Masayuki Takagishi, Kawasaki, JP;
Yuuzo Kamiguchi, Yokohama, JP;
Hiromi Yuasa, Yokohama, JP;
Tomohiko Nagata, Yokohama, JP;
Hiroaki Yoda, Kawasaki, JP;
Katsuhiko Koui, Kawasaki, JP;
Masatoshi Yoshikawa, Yokohama, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Masashi Sahashi, Yokohama, JP;
Masayuki Takagishi, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
There is provided a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers to be controlled, and a magnetic head and magnetic recording and/or reproducing system using the same. In a magnetoresistance effect element wherein a sense current is caused to flow in a direction perpendicular to the plane of the film, a resistance regulating layer is provided in at least one of a pinned layer, a free layer and an non-magnetic intermediate layer. The resistance regulating layer contains, as a principal component, an oxide, a nitride, a fluoride, a carbide or a boride. The resistance regulating layer may be a continuous film or may have pin holes. Thus, it is possible to provide a practical magnetoresistance effect element which has an appropriate value of resistance, which can be sensitized and which has a small number of magnetic layers, while effectively utilizing the scattering effect depending on spin.