Invention Grant
- Patent Title: Spin-orbit-torque magnetoresistive random access memory with voltage-controlled anisotropy
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Application No.: US15158658Application Date: 2016-05-19
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Publication No.: US09646670B2Publication Date: 2017-05-09
- Inventor: Kangho Lee , Jimmy Kan , Seung Hyuk Kang
- Applicant: QUALCOMM Incorporated
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C11/16 ; G11C11/18 ; H01L43/02 ; H01L43/08 ; H01L43/10 ; H01L43/12 ; G11C8/00

Abstract:
Methods and apparatus relating to spin-orbit-torque magnetoresistive random access memory with voltage-controlled anisotropy are disclosed. In an example, disclosed is a three-terminal magnetic tunnel junction (MTJ) storage element that is programmed via a combination of voltage-controlled magnetic anisotropy (VCMA) and spin-orbit torque (SOT) techniques. Also disclosed is a memory controller configured to program the three-terminal MTJ storage element via VCMA and SOT techniques. The disclosed devices improve efficiency over conventional devices by using less write energy, while having a design that is simpler and more scalable than conventional devices. The disclosed devices also have increased thermal stability without increasing required switching current, as critical switching current between states is essentially the same.
Public/Granted literature
- US20160267961A1 SPIN-ORBIT-TORQUE MAGNETORESISTIVE RANDOM ACCESS MEMORY WITH VOLTAGE-CONTROLLED ANISOTROPY Public/Granted day:2016-09-15
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