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. 09, 2002
Filed:
Dec. 20, 1999
Ryoichi Nakatani, Toyonaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The present application provides a magneto-resistive element excellent in symmetry of playback waveforms. The basic construction of the present application is as follows. That is, a magnetic layer , an insulating layer , and a magnetic layer are laminated; a power supply for applying a voltage between two magnetic layers is provided; an anti-ferromagnetic layer is laminated on the magnetic layer , direction of which magnetization is substantially parallel or counter-parallel with a detecting direction of an external magnetic field, and when the external magnetic field is not present, a power supply for causing a current to flow in a non-magnetic metal layer and in an inner direction of a layer surface thereof is provided so that a direction of magnetization of the magnetic layer is substantially at right angles to the detecting direction of the external magnetic field; and there is provided a signal detector for detecting a change of current tunneling through an insulating layer when the direction of magnetization of the magnetic layer is changed by the external magnetic field.