Static information storage and retrieval – Systems using particular element – Magnetoresistive
Reexamination Certificate
2007-06-05
2007-06-05
Elms, Richard T. (Department: 2824)
Static information storage and retrieval
Systems using particular element
Magnetoresistive
C365S201000, C360S324200
Reexamination Certificate
active
11070237
ABSTRACT:
Testing a TMR element includes a step of measuring initially a resistance value of the TMR element to provide the measured resistance value as a first resistance value, a step of measuring a resistance value of the TMR element after continuously feeding a current through the TMR element for a predetermined period of time, to provide the measured resistance value as a second resistance value, and a step of evaluating the TMR element depending upon a degree of change in resistance of the TMR element. The degree of change in resistance is determined based upon the first resistance value and the second resistance value.
REFERENCES:
patent: 6359433 (2002-03-01), Gillis et al.
patent: 6473257 (2002-10-01), Shimazawa et al.
patent: 6657829 (2003-12-01), Nakazawa et al.
patent: 6820020 (2004-11-01), Yokoyama et al.
patent: 2000-260012 (2000-09-01), None
Bae et al. Dec. 15, 2003. Electrical Reliability of Tunnelling Magnetoresistive Heads. Journal of Applied Physics. vol. 94 No. 12.
Hachisuka Nozomu
Inage Kenji
Kiyono Hiroshi
Saruki Shunji
Buchanan & Ingersoll & Rooney PC
Elms Richard T.
King Douglas S.
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