G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/24 (2006.01) H01F 10/32 (2006.01) H01F 41/14 (2006.01) H01F 41/30 (2006.01)
Patent
CA 2137321
A method for manufacturing a nonlinear, dual-axis thin-film magnetic device which can be used as an eletronic article surveillance system marker. The methodincludes providing a substrate having a surface characterized by first and second generally perpendicular axes. A magnetic field oriented parallel to the first axis is applied on the surface of the substrate. A first stack of relatively thin thin-film magnetic layers separated by nonmagnetic thin-film layers is grown on the substrate. The relatively thin thin-fim layers are grown in the presence of the magnetic field to a thickness sufficiently thick that the layers exhibit magnetic properties that are substantially independent of surface effects, but sufficiently thin that the easy axis of magnetization is oriented parallel to the second axis. A second stack of relatively thick thin-film magnetic layers separated by nonmagnetic thin-film layers is grown on the first stack. The relatively thick thin-film layers are grown in the presence of the magnetic field to a thickness sufficiently thick that the easy axis of magnetization is oriented parallel to the first axis.
Fell Timothy M.
Piotrowski Chester
Minnesota Mining And Manufacturing Company
Smart & Biggar
LandOfFree
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