Invention Grant
- Patent Title: Thermally assisted multi-level MRAM cell and method for writing a plurality of bits in the MRAM cell
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Application No.: US14438365Application Date: 2013-10-11
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Publication No.: US09754653B2Publication Date: 2017-09-05
- Inventor: Ioan Lucian Prejbeanu
- Applicant: CROCUS Technology SA
- Applicant Address: FR Grenoble
- Assignee: CROCUS TECHNOLOGY SA
- Current Assignee: CROCUS TECHNOLOGY SA
- Current Assignee Address: FR Grenoble
- Agency: Pearne & Gordon LLP
- Priority: EP12290368 20121025
- International Application: PCT/EP2013/071360 WO 20131011
- International Announcement: WO2014/063939 WO 20140501
- Main IPC: G11C11/15
- IPC: G11C11/15 ; G11C11/16 ; G11C11/56

Abstract:
Method for writing and reading a plurality of data bits to a magnetic random access memory (MRAM) cell including a magnetic tunnel junction including a reference magnetic layer having a reference magnetization, a tunnel barrier layer, and a SAF storage magnetic layer including a first and second storage magnetization being coupled antiparallel through a storage coupling layer and freely orientable at a high temperature threshold. The method includes: heating the magnetic tunnel junction to the high temperature threshold; and applying a write magnetic field to orient the first and second storage magnetization; wherein the high temperature threshold includes one of a first or third high temperature threshold such as to orient the first storage magnetization respectively antiparallel or parallel to the second storage magnetization; or a second high temperature threshold such as to orient the first storage magnetization with an angle below 180° with respect to the second storage magnetization.
Public/Granted literature
- US20150287450A1 THERMALLY ASSISTED MRAM CELL AND METHOD FOR WRITING A PLURALITY OF BITS IN THE MRAM CELL Public/Granted day:2015-10-08
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