发明授权
- 专利标题: Spin-transfer torque memory self-reference read and write assist methods
- 专利标题(中): 自转转矩存储器自参考读写辅助方法
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申请号: US12903305申请日: 2010-10-13
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公开(公告)号: US07961509B2公开(公告)日: 2011-06-14
- 发明人: Wenzhong Zhu , Yiran Chen , Xiaobin Wang , Zheng Gao , Haiwen Xi , Dimitar V. Dimitrov
- 申请人: Wenzhong Zhu , Yiran Chen , Xiaobin Wang , Zheng Gao , Haiwen Xi , Dimitar V. Dimitrov
- 申请人地址: US CA Scotts Valley
- 专利权人: Seagate Technology LLC
- 当前专利权人: Seagate Technology LLC
- 当前专利权人地址: US CA Scotts Valley
- 代理机构: Campbell Nelson Whipps LLC
- 主分类号: G11C11/14
- IPC分类号: G11C11/14
摘要:
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.
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