SMALL FORM FACTOR MAGNETIC SHIELD FOR MAGNETORESTRICTIVE RANDOM ACCESS MEMORY (MRAM)
    1.
    发明申请
    SMALL FORM FACTOR MAGNETIC SHIELD FOR MAGNETORESTRICTIVE RANDOM ACCESS MEMORY (MRAM) 有权
    用于磁阻随机存取存储器(MRAM)的小型磁阻电磁屏蔽

    公开(公告)号:US20140225208A1

    公开(公告)日:2014-08-14

    申请号:US13777475

    申请日:2013-02-26

    Abstract: Some implementations provide a die that includes a magnetoresistive random access memory (MRAM) cell array that includes several MRAM cells. The die also includes a first ferromagnetic layer positioned above the MRAM cell array, a second ferromagnetic layer positioned below the MRAM cell array, and several vias positioned around at least one MRAM cell. The via comprising a ferromagnetic material. In some implementations, the first ferromagnetic layer, the second ferromagnetic layer and the several vias define a magnetic shield for the MRAM cell array. The MRAM cell may include a magnetic tunnel junction (MTJ). In some implementations, the several vias traverse at least a metal layer and a dielectric layer of the die. In some implementations, the vias are through substrate vias. In some implementations, the ferromagnetic material has high permeability and high B saturation.

    Abstract translation: 一些实施方案提供了包括包括几个MRAM单元的磁阻随机存取存储器(MRAM)单元阵列的管芯。 芯片还包括位于MRAM单元阵列上方的第一铁磁层,位于MRAM单元阵列下方的第二铁磁层和位于至少一个MRAM单元周围的几个通孔。 通孔包括铁磁材料。 在一些实施方案中,第一铁磁层,第二铁磁层和几个通孔限定用于MRAM单元阵列的磁屏蔽。 MRAM单元可以包括磁性隧道结(MTJ)。 在一些实施方案中,几个通孔至少穿过管芯的金属层和电介质层。 在一些实施方案中,通孔通过衬底通孔。 在一些实施方案中,铁磁材料具有高磁导率和高B饱和度。

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