Electricity: measuring and testing – Magnetic – Magnetic information storage element testing
Reexamination Certificate
2011-08-30
2011-08-30
Tang, Minh N (Department: 2858)
Electricity: measuring and testing
Magnetic
Magnetic information storage element testing
C324S207210, C360S324110
Reexamination Certificate
active
08008912
ABSTRACT:
A method of testing P2stiffness of a magnetoresistance (MR) sensor stack including a P2pinned layer is provided. The method comprises the step of applying an external magnetic field to the MR sensor stack. The external magnetic field is oriented substantially perpendicular to a magnetic field of the P2pinned layer. The method further comprises varying an amplitude of the external magnetic field, measuring a change in a resistance of the MR sensor stack in response to the varying amplitude of the external magnetic field, and calculating the P2stiffness based on the measured change in resistance.
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Tang Minh N
Western Digital (Fremont) , LLC
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