Invention Grant
- Patent Title: Magnetic random access memory
- Patent Title (中): 磁性随机存取存储器
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Application No.: US12865194Application Date: 2009-01-09
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Publication No.: US08149615B2Publication Date: 2012-04-03
- Inventor: Shunsuke Fukami , Nobuyuki Ishiwata , Tetsuhiro Suzuki , Norikazu Ohshima , Kiyokazu Nagahara
- Applicant: Shunsuke Fukami , Nobuyuki Ishiwata , Tetsuhiro Suzuki , Norikazu Ohshima , Kiyokazu Nagahara
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2008-038066 20080219
- International Application: PCT/JP2009/050210 WO 20090109
- International Announcement: WO2009/104428 WO 20090827
- Main IPC: G11C11/00
- IPC: G11C11/00 ; G11C11/14 ; G11C11/15

Abstract:
An MRAM has: a memory cell including a first magnetoresistance element; and a reference cell including a second magnetoresistance element. The first magnetoresistance element has a first magnetization free layer, a first magnetization fixed layer, a second magnetization free layer and a first nonmagnetic layer sandwiched between the first magnetization fixed layer and the second magnetization free layer. The first magnetization free layer has: first and second magnetization fixed regions; and a magnetization free region. The magnetization free region and the second magnetization free layer are magnetically coupled to each other. Whereas, the second magnetoresistance element has: a third magnetization free layer whose magnetization easy axis is parallel to a second direction; a second magnetization fixed layer whose magnetization direction is fixed in a third direction perpendicular to the second direction; and a second nonmagnetic layer sandwiched between the second magnetization fixed layer and the third magnetization free layer.
Public/Granted literature
- US20100309712A1 MAGNETIC RANDOM ACCESS MEMORY Public/Granted day:2010-12-09
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