Invention Grant
- Patent Title: Low cost multi-state magnetic memory
- Patent Title (中): 低成本多状态磁存储器
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Application No.: US13216997Application Date: 2011-08-24
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Publication No.: US08456897B2Publication Date: 2013-06-04
- Inventor: Rajiv Yadav Ranjan , Parviz Keshtbod , Roger Klas Malmhall
- Applicant: Rajiv Yadav Ranjan , Parviz Keshtbod , Roger Klas Malmhall
- Applicant Address: US CA Fremont
- Assignee: Avalanche Technology, Inc.
- Current Assignee: Avalanche Technology, Inc.
- Current Assignee Address: US CA Fremont
- Agency: IPxLaw Group LLP
- Agent Maryam Imam
- Main IPC: G11C11/00
- IPC: G11C11/00

Abstract:
A multi-state current-switching magnetic memory element has a magnetic tunneling junction (MTJ), for storing more than one bit of information. The MTJ includes a fixed layer, a barrier layer, and a non-uniform free layer. In one embodiment, having 2 bits per cell, when one of four different levels of current is applied to the memory element, the applied current causes the non-uniform free layer of the MTJ to switch to one of four different magnetic states. The broad switching current distribution of the MTJ is a result of the broad grain size distribution of the non-uniform free layer.
Public/Granted literature
- US20110305078A1 LOW COST MULTI-STATE MAGNETIC MEMORY Public/Granted day:2011-12-15
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