MR sensor with flux guide enhanced hard bias structure
    61.
    发明授权
    MR sensor with flux guide enhanced hard bias structure 有权
    带传感器的MR传感器增强了硬偏置结构

    公开(公告)号:US08659292B2

    公开(公告)日:2014-02-25

    申请号:US12660909

    申请日:2010-03-05

    IPC分类号: G01R33/02

    摘要: A CPP MR sensor interposes a tapered soft magnetic flux guide (FG) layer between a hard magnetic biasing layer (HB) and the free layer of the sensor stack. The flux guide channels the flux of the hard magnetic biasing layer to effectively bias the free layer, while eliminating instability problems associated with magnetostatic coupling between the hard bias layers and the upper and lower shields surrounding the sensor when the reader-shield-spacing (RSS) is small.

    摘要翻译: CPP MR传感器将锥形软磁通导向器(FG)层介于硬磁偏置层(HB)和传感器堆叠的自由层之间。 磁通引导件引导硬磁偏置层的磁通,以有效地偏置自由层,同时消除与读取器屏蔽间隔(RSS)之间的硬偏置层与传感器周围的上下屏蔽之间的静磁耦合相关的不稳定性问题 ) 是小。

    MR device with synthetic free layer structure
    62.
    发明授权
    MR device with synthetic free layer structure 有权
    具有合成自由层结构的MR器件

    公开(公告)号:US08653615B2

    公开(公告)日:2014-02-18

    申请号:US12313351

    申请日:2008-11-19

    IPC分类号: H01L29/82

    摘要: A magneto-resistive device having a large output signal as well as a high signal-to-noise ratio is described along with a process for forming it. This improved performance was accomplished by expanding the free layer into a multilayer laminate comprising at least three ferromagnetic layers separated from one another by antiparallel coupling layers. The ferromagnetic layer closest to the transition layer must include CoFeB while the furthermost layer is required to have low Hc as well as a low and negative lambda value. One possibility for the central ferromagnetic layer is NiFe but this is not mandatory.

    摘要翻译: 描述具有大输出信号以及高信噪比的磁阻装置及其形成方法。 通过将自由层扩展成包括通过反平行耦合层彼此分离的至少三个铁磁层的多层层压体来实现这一改进的性能。 最接近过渡层的铁磁层必须包括CoFeB,而最外层需要具有低Hc以及低和负的λ值。 中心铁磁层的一种可能性是NiFe,但这不是强制性的。

    TMR device with novel free layer structure
    64.
    发明授权
    TMR device with novel free layer structure 有权
    TMR器件具有新颖的自由层结构

    公开(公告)号:US08456781B2

    公开(公告)日:2013-06-04

    申请号:US13561206

    申请日:2012-07-30

    IPC分类号: G11B5/39 C21D1/04

    摘要: A composite free layer having a FL1/insertion/FL2 configuration where a top surface of FL1 is treated with a weak plasma etch is disclosed for achieving enhanced dR/R while maintaining low RA, and low λ in TMR or GMR sensors. The weak plasma etch removes less than about 0.2 Angstroms of FL1 and is believed to modify surface structure and possibly increase surface energy. FL1 may be CoFe, CoFe/CoFeB, or alloys thereof having a (+) λ value. FL2 may be CoFe, NiFe, or alloys thereof having a (−) λ value. The thin insertion layer includes at least one magnetic element such as Co, Fe, and Ni, and at least one non-magnetic element. When CoFeBTa is selected as insertion layer, the CoFeB:Ta ratio is from 1:1 to 4:1.

    摘要翻译: 公开了具有FL1 /插入/ FL2配置的复合自由层,其中FL1的顶表面用弱等离子体蚀刻处理,以实现增强的dR / R,同时保持低RA和TMR或GMR传感器中的低λ。 弱等离子体蚀刻去除了小于约0.2埃的FL1,据信可以改变表面结构并可能增加表面能。 FL1可以是具有(+)λ值的CoFe,CoFe / CoFeB或其合金。 FL2可以是具有( - )λ值的CoFe,NiFe或其合金。 薄插入层包括至少一种诸如Co,Fe和Ni的磁性元件和至少一种非磁性元件。 当选择CoFeBTa作为插入层时,CoFeB:Ta的比例为1:1至4:1。

    TMR Device with Improved MgO Barrier
    67.
    发明申请
    TMR Device with Improved MgO Barrier 审中-公开
    具有改善MgO阻挡层的TMR器件

    公开(公告)号:US20120235258A1

    公开(公告)日:2012-09-20

    申请号:US13482017

    申请日:2012-05-29

    IPC分类号: H01L29/82

    摘要: A method of forming a high performance magnetic tunnel junction (MTJ) is disclosed wherein the tunnel barrier includes at least three metal oxide layers. The tunnel barrier stack is partially built by depositing a first metal layer, performing a natural oxidation (NOX) process, depositing a second metal layer, and performing a second NOX process to give a MOX1/MOX2 configuration. An uppermost metal layer on the MOX2 layer is not oxidized until after the MTJ stack is completely formed and an annealing process is performed to drive unreacted oxygen in the MOX1 and MOX2 layers into the uppermost metal layer. In an alternative embodiment, a plurality of metal oxide layers is formed on the MOX1 layer before the uppermost metal layer is deposited. The resulting MTJ stack has an ultralow RA around 1 ohm-μm2 and maintains a high magnetoresistive ratio characteristic of a single metal oxide tunnel barrier layer.

    摘要翻译: 公开了一种形成高性能磁隧道结(MTJ)的方法,其中隧道势垒包括至少三个金属氧化物层。 通过沉积第一金属层,执行自然氧化(NOX)工艺,沉积第二金属层以及执行第二NOX工艺以产生MOX1 / MOX2配置来部分构建隧道势垒堆叠。 在MOX2层上的最上层的金属层直到MTJ堆叠完全形成之后才被氧化,并且进行退火处理以将MOX1和MOX2层中的未反应的氧气驱入最上层的金属层。 在替代实施例中,在最上层金属层被沉积​​之前,在MOX1层上形成多个金属氧化物层。 所得到的MTJ堆叠具有约1欧姆 - μm2的超低RA,并且保持单个金属氧化物隧道势垒层的高磁阻比特性。