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:
Apr. 17, 2001
Filed:
Jun. 26, 1998
Kazuo Goto, Miyagi, JP;
Seiji Kumagai, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention provides a magnetic head which has a magnetic circuit of a reduced size to cope with a high density recording and a preferable recording/reproduction characteristic. The magnetic head according to the present invention has at least partially a non-magnetic body,and includes: a magnetic circuit block,constituted by magnetic bodies arranged to oppose each other via the non-magnetic body,; and a magnetic tunnel element,attached to this magnetic circuit block,and having a first magnetic layer,and a second magnetic layer,which are layered via an insulation layer,. In this magnetic head, a magnetic field from a magnetic recording medium is induced to the magnetic circuit block and the induced magnetic field changes a relative angle of magnetization of the first magnetic layer,and/or the second magnetic layer,with the other magnetic layer of the magnetic tunnel element