MRAM read bit with askew fixed layer
AssigneeHoneywell International Inc.
InventorRomney Katti
Life of this patent
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AssigneeHoneywell International Inc.
InventorRomney Katti
Estimating the term…
A new read scheme is provided for an MRAM bit having a reference layer (fixed) and a storage layer (free) sandwiching a nonmagnetic spacer layer. The reference layer has a magnetization direction that is tilted with respect to an easy axis of the storage layer. By applying a magnetic field to the bit at least partially orthogonal to the easy axis, the magnetization direction of the storage layer can be partially rotated or canted without switching the logical state of the MRAM bit. The resistivity of the bit is measured (calculated based on a voltage/current relationship) in two ways: (i) with the magnetization direction of the storage layer partially rotated in a first direction and (ii) with the magnetization direction of the storage layer in its bi-stable orientation parallel to the easy axis. Those measures can then be used to compare and determine the logical state of the storage layer.
An MRAM bit comprising:
An MRAM bit comprising:
A method of determining a logical state of an MRAM bit, comprising:
An MRAM bit comprising:
Dependencies are inferred from the claim text.