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:
Sep. 16, 1997
Filed:
Dec. 07, 1994
Susumu Soeya, Hitachiota, JP;
Shigeru Tadokoro, Hitachi, JP;
Takao Imagawa, Hitachi, JP;
Eiji Ashida, Hitachiota, JP;
Moriaki Fuyama, Hitachi, JP;
Hiroshi Fukui, Hitachi, JP;
Saburo Suzuki, Minamiashigara, JP;
Masayuki Takagi, Odawara, JP;
Shinji Narishige, Mito, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A magnetic disc apparatus is disclosed, in which a magneto-resistance effect film converts a magnetic signal into an electrical signal by use of the magneto-resistance effect, a pair of electrodes supplies a signal detection current to the magneto-resistance effect film, and a magnetic domain control layer controls the magnetic domain of the magneto-resistance effect film. The magneto-resistance effect film, the electrodes and the magnetic domain control layer constitute a magnetic head of magneto-resistance effect type. An isolation film is formed in a magneto-sensitive portion of the magneto-resistance effect film between the magneto-resistance effect film and the magnetic domain control layer to break the magnetic coupling between the magneto-resistance effect film and the magnetic domain control layer.