Static information storage and retrieval – Read only systems – Semiconductive
Reexamination Certificate
2011-04-26
2011-04-26
Luu, Pho M (Department: 2824)
Static information storage and retrieval
Read only systems
Semiconductive
C365S115000, C365S171000, C365S243000
Reexamination Certificate
active
07933137
ABSTRACT:
Non-volatile magnetic random access memory (MRAM) devices that include magnetic flip-flop structures that include a magnetization controlling structure; a first tunnel barrier structure; and a magnetization controllable structure that includes a first polarizing layer; and a first stabilizing layer, wherein the first tunnel barrier structure is between the magnetization controllable structure and the magnetization controlling structure and the first polarizing layer is between the first stabilizing layer and the first tunnel barrier structure, wherein the magnetic flip-flop device has two stable overall magnetic configurations, and wherein a first unipolar current applied to the device will cause the orientation of the magnetization controlling structure to reverse its orientation and a second unipolar current applied to the electronic device will cause the magnetization controllable structure to switch its magnetization so that the device reaches one of the two stable overall magnetic configurations, wherein the second unipolar current has an amplitude that is less than the first unipolar current; a second tunnel barrier structure and a reference layer, wherein the second tunnel barrier structure is between the magnetic flip-flop device and the reference layer. MRAM cells that include such devices and arrays including such cells are also disclosed.
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Chen Yiran
Dimitrov Dimitar V.
Heinonen Olle Gunnar
Lou Xiaohua
Xi Haiwen
Campbell Nelson Whipps LLC
Luu Pho M
Seagate Teachnology LLC
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