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:
Dec. 13, 1994
Filed:
Nov. 06, 1992
Applicant:
Inventors:
Thomas R McGuire, Yorktown Heights, NY (US);
Thomas S Plaskett, Katonah, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; H01L / ; G11C / ; G11B / ;
U.S. Cl.
CPC ...
324252 ; 338 / ; 360113 ; 29603 ;
Abstract
A magnetoresistive device is described for detecting magnetic fields incorporating a sandwich structure of four layers, two of which are ferromagnetic and which are separated by a non-ferromagnetic metallic layer and where one ferromagnetic layer is adjacent a fourth antiferromagnetic layer and exhibiting exchange anisotropy with the adjacent ferromagnetic layer. The invention overcomes the problem of small changes in magnetoresistance and in controlling the magnetization response of the magnetoresistive device.