Invention Grant
- Patent Title: Spin-transfer torque memory self-reference read and write assist methods
- Patent Title (中): 自转转矩存储器自参考读写辅助方法
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Application No.: US12903305Application Date: 2010-10-13
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Publication No.: US07961509B2Publication Date: 2011-06-14
- Inventor: Wenzhong Zhu , Yiran Chen , Xiaobin Wang , Zheng Gao , Haiwen Xi , Dimitar V. Dimitrov
- Applicant: Wenzhong Zhu , Yiran Chen , Xiaobin Wang , Zheng Gao , Haiwen Xi , Dimitar V. Dimitrov
- Applicant Address: US CA Scotts Valley
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Scotts Valley
- Agency: Campbell Nelson Whipps LLC
- Main IPC: G11C11/14
- IPC: G11C11/14

Abstract:
A spin-transfer torque memory apparatus and self-reference read and write assist schemes are described. One method of self-reference reading a spin-transfer torque memory unit includes applying a first read current through a magnetic tunnel junction data cell and forming a first bit line read voltage. A magnetic field is applied through the free magnetic layer the forming a magnetic field modified magnetic tunnel junction data cell. Then a second read current is applied thorough the magnetic field modified magnetic tunnel junction data cell forming a second bit line read voltage and compared with the first bit line read voltage to determine whether the first resistance state of the magnetic tunnel junction data cell was a high resistance state or low resistance state. Methods of applying a destabilizing magnetic field to the MTJ and then writing the desired resistance state are also disclosed.
Public/Granted literature
- US20110026317A1 SPIN-TRANSFER TORQUE MEMORY SELF-REFERENCE READ AND WRITE ASSIST METHODS Public/Granted day:2011-02-03
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