Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Reexamination Certificate
2007-01-04
2009-11-17
Patidar, Jay M (Department: 2858)
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
C324S691000, C324S719000
Reexamination Certificate
active
07619409
ABSTRACT:
A method of electrically characterizing a magnetic tunnel junction film stack having three metal layers separated by two dielectric layers comprises three steps. In a first step, four or more probes are electrically coupled to a surface of the magnetic tunnel junction film stack. In a second step, electrical resistance is determined with the four or more probes for each of a plurality of spacings between the probes. Finally, in a third step, the plurality of resistance measurements are fitted with one or more equations that relate electrical resistance to probe spacing.
REFERENCES:
patent: 6538430 (2003-03-01), Carrington et al.
patent: 6927569 (2005-08-01), Worledge et al.
patent: 2004/0051522 (2004-03-01), Worledge et al.
Alexanian Vazken
International Business Machines - Corporation
Patidar Jay M
Ryan & Mason & Lewis, LLP
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