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    CoFe insertion for exchange bias and sensor improvement
    4.
    发明授权
    CoFe insertion for exchange bias and sensor improvement 有权
    CoFe插入用于交换偏置和传感器改进

    公开(公告)号：US07564658B2

    公开(公告)日：2009-07-21

    申请号：US10948021

    申请日：2004-09-23

    申请人： Kunliang Zhang ,  Hui-Chuan Wang ,  Tong Zhao ,  Min Li ,  Chyu-Jiuh Torng

    发明人： Kunliang Zhang ,  Hui-Chuan Wang ,  Tong Zhao ,  Min Li ,  Chyu-Jiuh Torng

    IPC分类号： G11B5/33

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3929 ,  G11B2005/3996

    摘要： A GMR spin value structure with improved performance and a method for making the same is disclosed. A key feature is the incorporation of a thin ferromagnetic insertion layer such as a 5 Angstrom thick CoFe layer between a NiCr seed layer and an IrMn AFM layer. Lowering the Ar flow rate to 10 sccm for the NiCr sputter deposition and raising the Ar flow rate to 100 sccm for the IrMn deposition enables the seed layer to be thinned to 25 Angstroms and the AFM layer to about 40 Angstroms. As a result, HEX between the AFM and pinned layers increases by up to 200 Oe while the Tb is maintained at or above 250° C. When the seed/CoFe/AFM configuration is used in a read head sensor, a higher GMR ratio is observed in addition to smaller free layer coercivity (HCF), interlayer coupling (HE), and HK values.

    摘要翻译： 公开了具有改进性能的GMR自旋值结构及其制造方法。 一个关键特征是在NiCr种子层和IrMn AFM层之间引入薄铁磁插入层，例如5埃厚的CoFe层。 将Ni流速降低到10sccm，对于IrMn沉积，Ar流速提高到100sccm，使得种子层可以变薄到25埃，AFM层变成约40埃。 结果，AFM和被钉扎层之间的HEX增加高达200Oe，而Tb保持在或超过250℃。当在读头传感器中使用种子/ CoFe / AFM配置时，较高的GMR比率 除了较小的自由层矫顽力（HCF），层间耦合（HE）和HK值之外还观察到。

    CoFe insertion for exchange bias and sensor improvement
    5.
    发明申请
    CoFe insertion for exchange bias and sensor improvement 有权
    CoFe插入用于交换偏置和传感器改进

    公开(公告)号：US20060061915A1

    公开(公告)日：2006-03-23

    申请号：US10948021

    申请日：2004-09-23

    申请人： Kunliang Zhang ,  Hui-Chuan Wang ,  Tong Zhao ,  Min Li ,  Chyu-Jiuh Torng

    发明人： Kunliang Zhang ,  Hui-Chuan Wang ,  Tong Zhao ,  Min Li ,  Chyu-Jiuh Torng

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3929 ,  G11B2005/3996

    摘要： A GMR spin value structure with improved performance and a method for making the same is disclosed. A key feature is the incorporation of a thin ferromagnetic insertion layer such as a 5 Angstrom thick CoFe layer between a NiCr seed layer and an IrMn AFM layer. Lowering the Ar flow rate to 10 sccm for the NiCr sputter deposition and raising the Ar flow rate to 100 sccm for the IrMn deposition enables the seed layer to be thinned to 25 Angstroms and the AFM layer to about 40 Angstroms. As a result, HEX between the AFM and pinned layers increases by up to 200 Oe while the Tb is maintained at or above 250° C. When the seed/CoFe/AFM configuration is used in a read head sensor, a higher GMR ratio is observed in addition to smaller free layer coercivity (HCF), interlayer coupling (HE), and HK values.

    摘要翻译： 公开了具有改进性能的GMR自旋值结构及其制造方法。 一个关键特征是在NiCr种子层和IrMn AFM层之间引入薄铁磁插入层，例如5埃厚的CoFe层。 将Ni流速降低到10sccm，对于IrMn沉积，Ar流速提高到100sccm，使得种子层可以变薄到25埃，AFM层变成约40埃。 结果，AFM和被钉扎层之间的HEX增加高达200Oe，而Tb保持在或超过250℃。当在读头传感器中使用种子/ CoFe / AFM配置时，较高的GMR比率 观察到除了较小的自由层矫顽力（H SUB CF），层间耦合（H SUB）和HK值之外。

    Method of manufacturing a CPP structure with enhanced GMR ratio
    7.
    发明授权
    Method of manufacturing a CPP structure with enhanced GMR ratio 有权
    制造具有增强的GMR比的CPP结构的方法

    公开(公告)号：US07918014B2

    公开(公告)日：2011-04-05

    申请号：US11180808

    申请日：2005-07-13

    申请人： Kunliang Zhang ,  Min Li ,  Yu-Hsia Chen ,  Chyu-Jiuh Torng

    发明人： Kunliang Zhang ,  Min Li ,  Yu-Hsia Chen ,  Chyu-Jiuh Torng

    IPC分类号： G11B5/187 ,  C23C14/34

    CPC分类号： H01L43/08 ,  B82Y40/00 ,  G11B5/3906 ,  H01F10/3254 ,  H01F10/3259 ,  H01F10/3272 ,  H01F10/3281 ,  H01F10/3295 ,  H01F41/18 ,  H01F41/303 ,  H01L43/10 ,  Y10T29/49032 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T428/1114 ,  Y10T428/1129 ,  Y10T428/115

    摘要： A CPP-GMR spin valve having a CoFe/NiFe composite free layer is disclosed in which Fe content of the CoFe layer ranges from 20 to 70 atomic % and Ni content in the NiFe layer varies from 85 to 100 atomic % to maintain low Hc and λS values. A small positive magnetostriction value in a Co75Fe25 layer is used to offset a negative magnetostriction value in a Ni90Fe10 layer. The CoFe layer is deposited on a sensor stack in which a seed layer, AFM layer, pinned layer, and non-magnetic spacer layer are sequentially formed on a substrate. After a NiFe layer and capping layer are sequentially deposited on the CoFe layer, the sensor stack is patterned to give a sensor element with top and bottom surfaces and a sidewall connecting the top and bottom surfaces. Thereafter, a dielectric layer is formed adjacent to the sidewalls.

    摘要翻译： 公开了一种具有CoFe / NiFe复合自由层的CPP-GMR自旋阀，其中CoFe层的Fe含量为20〜70原子％，NiFe层的Ni含量为85〜100原子％，保持低Hc， λS值。 使用Co75Fe25层中的小的正磁致伸缩值来抵消Ni90Fe10层中的负磁致伸缩值。 CoFe层沉积在传感器堆叠上，其中种子层，AFM层，钉扎层和非磁性间隔层依次形成在基底上。 在NiFe层和覆盖层顺序地沉积在CoFe层上之后，传感器堆叠被图案化以给出具有顶表面和底表面的传感器元件以及连接顶表面和底表面的侧壁。 此后，与侧壁相邻地形成电介质层。

    FCC-like trilayer AP2 structure for CPP GMR EM improvement
    8.
    发明申请
    FCC-like trilayer AP2 structure for CPP GMR EM improvement 有权
    FCC类三层AP2结构，用于CPP GMR EM改进

    公开(公告)号：US20090314632A1

    公开(公告)日：2009-12-24

    申请号：US12583742

    申请日：2009-08-25

    申请人： Kunliang Zhang ,  Dan Abels ,  Min Li ,  Chyu-Jiuh Torng ,  Chen-Jung Chien ,  Yu-Hsia Chen

    发明人： Kunliang Zhang ,  Dan Abels ,  Min Li ,  Chyu-Jiuh Torng ,  Chen-Jung Chien ,  Yu-Hsia Chen

    IPC分类号： C23C14/34 ,  B05D5/12

    CPC分类号： H01L43/10 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00 ,  G11B5/3906 ,  H01F10/16 ,  H01F10/3236 ,  H01F10/3259 ,  H01F10/3272 ,  H01F41/302

    摘要： A method of forming a CPP-GMR spin valve having a pinned layer with an AP2/coupling/AP1 configuration is disclosed wherein the AP2 portion is a FCC-like trilayer having a composition represented by CoZFe(100-Z)/Fe(100-X)TaX/CoZFe(100-Z) or CoZFe(100-Z)/FeYCo(100-Y)/CoZFe(100-Z) where x is 3 to 30 atomic %, y is 40 to 100 atomic %, and z is 75 to 100 atomic %. Preferably, z is 90 to provide a face centered cubic structure that minimizes electromigration. Optionally, the middle layer is comprised of an Fe rich alloy such as FeCr, FeV, FeW, FeZr, FeNb, FeHf, or FeMo. EM performance is improved significantly compared to a spin valve with a conventional AP2 Co50Fe50 or Co75Fe25 single layer. MR ratio is also increased and RA is maintained at an acceptable level. The coupling layer is preferably Ru and the AP1 layer may be comprised of a lamination of CoFe and Cu layers as in [CoFe/Cu]2/CoFe.

    摘要翻译： 公开了一种形成具有AP2 /偶联/ AP1构型的钉扎层的CPP-GMR自旋阀的方法，其中AP2部分是具有由CoZFe（100-Z）/ Fe（100-Z）/ Fe X）TaX / CoZFe（100-Z）或CoZFe（100-Z）/ FeYCo（100-Y）/ CoZFe（100-Z），其中x为3至30原子％，y为40至100原子％ 为75〜100原子％。 优选地，z为90以提供使电迁移最小化的面心立方结构。 任选地，中间层由富Fe合金如FeCr，FeV，FeW，FeZr，FeNb，FeHf或FeMo组成。 与具有常规AP2 Co50Fe50或Co75Fe25单层的自旋阀相比，EM性能显着提高。 MR比也增加，RA维持在可接受的水平。 耦合层优选为Ru，并且AP1层可以由如[CoFe / Cu] 2 / CoFe中的CoFe和Cu层的层叠构成。

    FCC-like trilayer AP2 structure for CPP GMR EM improvement
    9.
    发明授权
    FCC-like trilayer AP2 structure for CPP GMR EM improvement 有权
    FCC类三层AP2结构，用于CPP GMR EM改进

    公开(公告)号：US07583481B2

    公开(公告)日：2009-09-01

    申请号：US11234719

    申请日：2005-09-23

    申请人： Kunliang Zhang ,  Dan Abels ,  Min Li ,  Chyu-Jiuh Torng ,  Chen-Jung Chien ,  Yu-Hsia Chen

    发明人： Kunliang Zhang ,  Dan Abels ,  Min Li ,  Chyu-Jiuh Torng ,  Chen-Jung Chien ,  Yu-Hsia Chen

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： H01L43/10 ,  B82Y10/00 ,  B82Y25/00 ,  B82Y40/00 ,  G11B5/3906 ,  H01F10/16 ,  H01F10/3236 ,  H01F10/3259 ,  H01F10/3272 ,  H01F41/302

    摘要： A CPP-GMR spin valve having a pinned layer with an AP2/coupling/AP1 configuration is disclosed wherein the AP2 portion is a FCC-like trilayer having a composition represented by CoZFe(100-Z)/Fe(100-X)TaX/CoZFe(100-Z) or CoZFe(100-Z)/FeYCo(100-Y)/CoZFe(100-Z) where x is 3 to 30 atomic %, y is 40 to 100 atomic %, and z is 75 to 100 atomic %. Preferably, z is 90 to provide a face centered cubic structure that minimizes electromigration. Optionally, the middle layer is comprised of an Fe rich alloy such as FeCr, FeV, FeW, FeZr, FeNb, FeHf, or FeMo. EM performance is improved significantly compared to a spin valve with a conventional AP2 Co50Fe5 or Co75Fe25 single layer. The MR ratio of the spin valve is also increased and the RA is maintained at an acceptable level. The coupling layer is preferably Ru and the AP1 layer may be comprised of a lamination of CoFe and Cu layers as in [CoFe/Cu]2/CoFe.

    摘要翻译： 公开了具有AP2 /耦合/ AP1构型的钉扎层的CPP-GMR自旋阀，其中AP2部分是具有由CoZFe（100-Z）/ Fe（100-X）TaX / CoZFe（100-Z）或CoZFe（100-Z）/ FeYCo（100-Y）/ CoZFe（100-Z），其中x为3至30原子％，y为40至100原子％，z为75至100 原子％。 优选地，z为90以提供使电迁移最小化的面心立方结构。 任选地，中间层由富Fe合金如FeCr，FeV，FeW，FeZr，FeNb，FeHf或FeMo组成。 与使用常规AP2 Co50Fe5或Co75Fe25单层的自旋阀相比，EM性能显着提高。 自旋阀的MR比也增加，RA保持在可接受的水平。 耦合层优选为Ru，并且AP1层可以由如[CoFe / Cu] 2 / CoFe中的CoFe和Cu层的层叠构成。

    Novel hard bias design for sensor applications
    10.
    发明申请
    Novel hard bias design for sensor applications 有权

    公开(公告)号：US20060132989A1

    公开(公告)日：2006-06-22

    申请号：US11016507

    申请日：2004-12-17

    申请人： Kunliang Zhang ,  Mao-Min Chen ,  Chyu-Jiuh Torng ,  Min Li ,  Chen-Jung Chien

    发明人： Kunliang Zhang ,  Mao-Min Chen ,  Chyu-Jiuh Torng ,  Min Li ,  Chen-Jung Chien

    IPC分类号： G11B5/33 ,  G11B5/127

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3909 ,  G11B5/3932 ,  G11B2005/3996

    摘要： A hard bias structure for biasing a free layer in a MR element within a magnetic read head is comprised of a soft magnetic underlayer such as NiFe and a hard bias layer comprised of Co78.6Cr5.2Pt16.2 or Co65Cr15Pt20 that are rigidly exchange coupled to ensure a well aligned longitudinal biasing direction with minimal dispersions. The hard bias structure is formed on a BCC seed layer such as CrTi to improve lattice matching. The hard bias structure may be laminated in which each of the underlayers and hard bias layers has a thickness that is adjusted to optimize the total HC, Mrt, and S values. The present invention encompasses CIP and CPP spin values, MTJ devices, and multi-layer sensors. A larger process window for fabricating the hard bias structure is realized and lower asymmetry output and NBLW reject rates during a read operation are achieved.