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. 14, 1990
Filed:
Jun. 14, 1989
Applicant:
Inventor:
Peter Grunberg, Julich, DE;
Assignee:
Kernforschungsanlage Julich GmbH, Julich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ; G11B / ; H01L / ;
U.S. Cl.
CPC ...
324252 ; 338 / ; 360113 ;
Abstract
A magnetic field sensor comprises a stack of ferromagnetic layers advantageously separated by an intermediate layer of proper material and so arranged that the ferromagnetic layers are with one component in an antiparallel magnetization direction. The sensor is provided with terminals for passing an electric current through the stack and for detecting a voltage drop across the stack. The magnetic resistance change with such a stack is substantially greater than in systems which do not provide an antiparallel magnetization or do not have the intermediate layer.