Magnetic random access memory and manufacturing method thereof
    9.
    发明专利
    Magnetic random access memory and manufacturing method thereof 审中-公开
    磁性随机存取存储器及其制造方法

    公开(公告)号:JP2008098515A

    公开(公告)日:2008-04-24

    申请号:JP2006280481

    申请日:2006-10-13

    Inventor: KAJIYAMA TAKESHI

    CPC classification number: G11C11/16 B82Y10/00 G11C11/155 H01L27/228 H01L27/24

    Abstract: PROBLEM TO BE SOLVED: To reduce a writing current value by reducing an area of a magnetoresistance effect element. SOLUTION: The magnetic random access memory is provided with a magnetoresistance effect element MTJ having a fixed layer 11 having a fixed magnetization direction, a recording layer 12 having a reversible magnetization direction and a non-magnetic layer 13 provided between the fixed layer and the recording layer, wherein a cavity portion 20a is formed on the center of the recording layer, and the magnetization directions of the fixed layer and the recording layer become a parallel or counterparallel status depending on the direction of a current to be applied between the fixing layer and the recording layer; an insulating layer 20 formed in the cavity portion; a wiring 22 connected to one end of the magnetoresistance effect element; and a transistor Tr connected to the other end of the magnetoresistance effect element. COPYRIGHT: (C)2008,JPO&INPIT

    Abstract translation: 要解决的问题:通过减小磁阻效应元件的面积来减小写入电流值。 解决方案:磁性随机存取存储器设置有具有固定磁化方向的固定层11的磁阻效应元件MTJ,具有可逆磁化方向的记录层12和设置在固定层之间的非磁性层13 和记录层,其中在记录层的中心上形成空腔部分20a,并且固定层和记录层的磁化方向根据要施加的记录层之间的电流的方向成为平行或反平行状态 固定层和记录层; 形成在空腔部分中的绝缘层20; 连接到磁阻效应元件的一端的布线22; 以及与磁阻效应元件的另一端连接的晶体管Tr。 版权所有(C)2008,JPO&INPIT

    Nonvolatile memory device
    10.
    发明专利
    Nonvolatile memory device 有权
    非易失性存储器件

    公开(公告)号:JP2007150159A

    公开(公告)日:2007-06-14

    申请号:JP2005345462

    申请日:2005-11-30

    Abstract: PROBLEM TO BE SOLVED: To provide a nonvolatile memory device with a magnetoresistive element wherein inversion magnetic filed in a memory layer is small, and which consists of a magnetoresistive element of high uniaxial magnetic anisotropy.
    SOLUTION: Ferromagnetic layers 18, 22 have magnetization in such a magnetization direction as to cancel each other, and the magnetization is roughly zero as a whole of the ferromagnetic layers 18, 22. That is, the ferromagnetic layers 18, 22 are subjected to exchange coupling via a non-magnetic layer 20, and form an SAF structure. Since magnetization of the ferromagnetic layers 18, 22 forming the SAF structure is roughly zero generally, magnetization of a memory layer RL is decided on magnetization of the ferromagnetic layer 14. Consequently, a ferromagnetic layer 14 is formed of a CoFeB alloy of high uniaxial magnetic anisotropy, and the ferromagnetic layers 18, 22 are formed of a CoFe alloy of high exchange coupling force.
    COPYRIGHT: (C)2007,JPO&INPIT

    Abstract translation: 要解决的问题:提供一种具有磁阻元件的非易失性存储器件,其中存储层中的反转磁场较小,并且由具有高单轴磁各向异性的磁阻元件组成。 铁磁层18,22具有彼此抵消的磁化方向的磁化,并且作为整个铁磁层18,22的磁化大致为零。也就是说,铁磁层18,22是 经由非磁性层20进行交换耦合,形成SAF结构。 由于形成SAF结构的铁磁层18,22的磁化通常大致为零,故存储层RL的磁化决定于铁磁层14的磁化。因此,铁磁层14由高的单轴磁性CoFeB合金形成 各向异性,并且铁磁层18,22由具有高交换耦合力的CoFe合金形成。 版权所有(C)2007,JPO&INPIT

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