Invention Grant
US09025371B1 Spin-transfer torque magnetic random access memory (STTMRAM) with perpendicular laminated free layer
有权
旋转转矩磁性随机存取存储器(STTMRAM)具有垂直层压自由层
- Patent Title: Spin-transfer torque magnetic random access memory (STTMRAM) with perpendicular laminated free layer
- Patent Title (中): 旋转转矩磁性随机存取存储器(STTMRAM)具有垂直层压自由层
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Application No.: US14611125Application Date: 2015-01-30
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Publication No.: US09025371B1Publication Date: 2015-05-05
- Inventor: Yiming Huai , Rajiv Yadav Ranjan , Roger K. Malmhall
- Applicant: Avalanche Technology, Inc.
- Applicant Address: US CA Fremont
- Assignee: Avalanche Technology, Inc.
- Current Assignee: Avalanche Technology, Inc.
- Current Assignee Address: US CA Fremont
- Agent Bing K. Yen
- Main IPC: G11C11/14
- IPC: G11C11/14 ; H01L43/10 ; H01L43/08 ; H01L43/02

Abstract:
A perpendicular spin-transfer torque magnetic random access memory (STTMRAM) element includes a fixed layer having a magnetization that is substantially fixed in one direction and a barrier layer formed on top of the fixed layer and a free layer. The free layer has a number of alternating laminates, each laminate being made of a magnetic layer and an insulating layer. The magnetic layer is switchable and formed on top of the barrier layer. The free layer is capable of switching its magnetization to a parallel or an anti-parallel state relative to the magnetization of the fixed layer during a write operation when bidirectional electric current is applied across the STTMRAM element. Magnetic layers of the laminates are ferromagnetically coupled to switch together as a single domain during the write operation and the magnetization of the fixed and free layers and the magnetic layers of the laminates have perpendicular anisotropy.
Public/Granted literature
- US20150137293A1 Spin-Transfer Torque Magnetic Random Access Memory (STTMRAM) with Perpendicular Laminated Free Layer Public/Granted day:2015-05-21
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