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:
Aug. 19, 1997
Filed:
May. 13, 1994
Hidefumi Yamamoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In an artificial superlattice magnetoresistance effect element in which two or more of magnetic thin film layers having different coercive forces are stacked with intervening of a non-magnetic film layer and resistance changes depending on directions of magnetization in adjacent magnetic thin film layers by utilizing differences in the coercive forces, an anisotropy magnetic field Hk is increased by reducing a thickness of a soft magnetic layer, anisotropy in the magnetic thin film layer is obtained by forming the magnetic thin film layer in a magnetic field to thus increase the Hk, a material having large Hk is used as a soft magnetic material for the soft magnetic layer, and further the anisotropy is obtained by reducing a pattern width into 1-30 .mu.m to thus increase the Hk, whereby the resistance change is achieved in the neighborhood of a zero magnetic field and thus no bias mechanism is required.