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    • 3. 发明公开
    • Non-volatile magnetic memory element with graded layer
    • Nichtflüchtigesmagnetisches Speicellelement mit abgestufter Schicht
    • EP2506264A1
    • 2012-10-03
    • EP12161429.1
    • 2008-02-11
    • Avalanche Technology, Inc.
    • Ranjan, Rajiv YadavKeshtbod, ParvizMalmhall, Roger Klas
    • G11C11/16
    • B82Y25/00B82Y40/00G11C11/161H01F10/3236H01F10/3254H01F10/3272H01F41/303H01L27/228H01L43/08
    • A non-volatile magnetic memory element (10) comprises a bottom electrode (18), a seeding layer(19) formed on top of the bottom electrode, a pinning layer(20) formed on top of the seeding layer, a fixed layer (22) formed on top of the pinning layer, a tunnel layer (24) formed on top of the fixed layer, a free layer (26) formed on top of the tunnel layer, a cap layer (28) formed on top of the free layer, and a top electrode (30) formed on top of the cap layer. At least one of the bottom electrode, pinning layer, fixed layer, tunnel layer, free layer, cap layer or top electrode is graded. Current is applied to through the bottom electrode to the top electrode, or through the top electrode to the bottom electrode, to switch the magnetization state of the memory element. The invention further comprises a memory cell, a method of manufacturing a non-volatile memory integrated circuit, and a use of a magnetic tunnel junction in a non-volatile magnetic memory element.
    • 非易失性磁存储元件(10)包括底电极(18),形成在底电极顶部的接种层(19),形成在接种层顶部的钉扎层(20),固定层 22),形成在所述固定层的顶部上的隧道层(24),形成在所述隧道层顶部的自由层(26),形成在所述自由层的顶部的盖层(28) 层,以及形成在盖层顶部上的顶部电极(30)。 底部电极,钉扎层,固定层,隧道层,自由层,覆盖层或顶部电极中的至少一个被分级。 电流通过底部电极施加到顶部电极,或通过顶部电极施加到底部电极,以切换存储元件的磁化状态。 本发明还包括存储单元,制造非易失性存储器集成电路的方法以及在非易失性磁存储元件中使用磁性隧道结。