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. 10, 2001
Filed:
Mar. 11, 1997
Kazuhiro Saito, Yokohama, JP;
Akiko Saito, Kawasaki, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Akihiko Tsutai, Kawasaki, JP;
Hiroaki Yoda, Kawasaki, JP;
Tadahiko Kobayashi, Yokohama, JP;
Yuichi Ohsawa, Tokyo, JP;
Masahi Sahashi, Yokohama, JP;
Yuzo Kamiguchi, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A magnetic yoke having a magnetic gap provided in the side of the surface facing the medium is disposed on the surface of a substrate. An MR film is disposed on the surface of the magnetic yoke substantially parallel to the substrate with a predetermined separation from the surface S facing the medium. At least both end portions of the MR film are magnetically coupled to the magnetic yoke. A pair of leads for supplying sensing current to the MR film have magnetic lead portions formed from the same magnetic layers as the magnetic yoke. The magnetic lead portions curb deterioration of MR head properties and yield reduction during formation of the leads. Furthermore, a bias magnetic field is applied to the magnetic yoke and the MR film at least during operation of the head. This bias magnetic field is for instance provided by a magnetic field induced by the electric current. Alternatively, a magnetic field induced by the electric current is applied while heat-processing the magnetic yoke. Magnetic anisotropy is induced to the magnetic yoke in a direction differing according to the position. This magnetic anisotropy curbs Barkhausen noise caused by the magnetic yoke.