Identification element and method of manufacturing an identifica

Details Identification element and method of manufacturing an identifica Identification element and method of manufacturing an identifica

1998-06-22

1999-11-16

Nelms, David

Static information storage and retrieval

Systems using particular element

Magnetic thin film

365158, G11C 1114

Patent

active

059869267

ABSTRACT:
The present invention is directed to an identification element comprising a layer of an anisotropic magnetic material exhibiting a preferred axis (x), high permeability and low coercive force (soft magnetic material), which on the application of an external alternating magnetic field generates a characteristic signal (A(t)), which signal (A(t)) is at its maximum level when the preferred axis (x) of the identification element is oriented parallel to the external alternating magnetic field, and further comprising a layer of a magnetic material of low permeability and high coercive force (semihard or hard magnetic material) which is arranged on the soft magnetic material or in the immediate proximity thereof, with the semihard or hard magnetic material having regions differing in magnetization.

REFERENCES:
patent: 5060193 (1991-10-01), Daughton et al.

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