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. 03, 2001
Filed:
Mar. 29, 1999
Haruo Urai, Tokyo, JP;
Shigeru Mori, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Since the magnetic field response sensitivity of a resistance change &dgr;R is deteriorated to a low value when a longitudinal bias magnetic field is applied, a structure by which a higher magnetic field response sensitivity is obtained is realized. A giant magnetoresistive sensing element for detecting a magnetic field from a magnetic disk to read a signal includes a magnetic fixed layer magnetized in parallel to a signal magnetic field direction, an electrically conductive layer to which a current is supplied from the exterior, for detecting a resistance change which is used for reading a signal, and a magnetic free layer which vibratingly rotates a direction of magnetization thereof due to the signal magnetic field from the magnetic disk, wherein the magnetic easy axis of the magnetic free layer is in parallel to the signal magnetic field direction, and the MR sensitivity in the signal magnetic field direction is higher than the MR sensitivity to a direction perpendicular to the signal magnetic field.