MAGNETIC SHIELD PACKAGE AND SEAL MATERIAL OF MAGNETIC NON-VOLATILE MEMORY ELEMENT

摘要

A magnetic shield package and seal material of a magnetic non-volatile memory element for improving the record holding reliability of an MRAM element. A soft magnetic material containing resin composite material containing soft magnetic material mixed in resin is used as a seal resin (14) for sealing the MRAM element (11) so as to form a magnetic shield package (10). Thus, with respect to a low-frequency magnetic field, it is possible to suppress intrusion of magnetic flux into the MRAM element (11) thanks to the contribution of the real part mu' term of the permeability. Moreover, with respect to the high-frequency magnetic field, thanks to the imaginary part mu" term, the magnetic field is absorbed as thermal energy and intrusion of the magnetic flux to the MRAM element (11) is suppressed. Furthermore, by sealing the MRAM element (11) so as to surround it, it is possible to effectively suppress intrusion of magnetic flux from various directions. Accordingly, it is possible to improve the record holding reliability of the MRAM element (11) with respect to the external magnetic field of a wide frequency range.