MULTI-STATE SPIN-TORQUE TRANSFER MAGNETIC RANDOM ACCESS MEMORY
    11.
    发明申请
    MULTI-STATE SPIN-TORQUE TRANSFER MAGNETIC RANDOM ACCESS MEMORY 审中-公开
    多状态转子转矩磁性随机存取存储器

    公开(公告)号:US20090218645A1

    公开(公告)日:2009-09-03

    申请号:US12397255

    申请日:2009-03-03

    Abstract: A multi-state spin-torque transfer magnetic random access memory (STTMRAM) is formed on a film and includes a first magnetic tunneling junctions (MTJ) having a first fixed layer, a first sub-magnetic tunnel junction (sub-MTJ) layer and a first free layer. The first fixed layer and first free layer each have a first magnetic anisotropy. The STTMRAM further includes a non-magnetic spacing layer formed on top of the first MTJ layer and a second MTJ formed on top of the non-magnetic spacing layer. The second MTJ has a second fixed layer, a second sub-MTJ layer and a second free layer. The second fixed and second free layers each have a second magnetic anisotropy, wherein at least one of the first or second magnetic anisotropy is perpendicular to the plane of the film.

    Abstract translation: 在薄膜上形成多态自旋转矩传递磁随机存取存储器(STTMRAM),其包括具有第一固定层,第一子磁性隧道结(sub-MTJ)层和第一子磁隧道结(sub-MTJ)层的第一磁隧道结(MTJ) 第一个自由层。 第一固定层和第一自由层各自具有第一磁各向异性。 STTMRAM还包括形成在第一MTJ层的顶部上的非磁性间隔层和形成在非磁性间隔层的顶部上的第二MTJ。 第二MTJ具有第二固定层,第二子MTJ层和第二自由层。 第二固定和第二自由层各自具有第二磁各向异性,其中第一或第二磁各向异性中的至少一个垂直于膜的平面。

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