TMR Device with Novel Free Layer Structure
    51.
    发明申请
    TMR Device with Novel Free Layer Structure 有权
    具有新型自由层结构的TMR器件

    公开(公告)号:US20130001189A1

    公开(公告)日:2013-01-03

    申请号:US13561206

    申请日:2012-07-30

    IPC分类号: G11B5/33

    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,其中用弱等离子体蚀刻处理FL1的顶表面,以实现增强的dR / R,同时保持低的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。

    CPP device with an enhanced dR/R ratio
    52.
    发明授权
    CPP device with an enhanced dR/R ratio 有权
    具有增强的dR / R比的CPP装置

    公开(公告)号:US08031441B2

    公开(公告)日:2011-10-04

    申请号:US11803057

    申请日:2007-05-11

    IPC分类号: G11B5/39

    摘要: A CPP-GMR spin valve having a composite spacer layer comprised of at least one metal (M) layer and at least one semiconductor or semi-metal (S) layer is disclosed. The composite spacer may have a M/S, S/M, M/S/M, S/M/S, M/S/M/S/M, or a multilayer (M/S/M)n configuration where n is an integer ≧1. The pinned layer preferably has an AP2/coupling/AP1 configuration wherein the AP2 portion is a FCC trilayer represented by CoZFe(100-Z)/FeYCo(100-Y)/CoZFe(100-Z) where y is 0 to 60 atomic %, and z is 75 to 100 atomic %. In one embodiment, M is Cu with a thickness from 0.5 to 50 Angstroms and S is ZnO with a thickness of 1 to 50 Angstroms. The S layer may be doped with one or more elements. The dR/R ratio of the spin valve is increased to 10% or greater while maintaining acceptable EM and RA performance.

    摘要翻译: 公开了具有由至少一个金属(M)层和至少一个半导体或半金属(S)层组成的复合间隔层的CPP-GMR自旋阀。 复合间隔物可以具有M / S,S / M,M / S / M,S / M / S,M / S / M / S / M或多层(M / S / M) 是整数≧1。 钉扎层优选具有AP2 /耦合/ AP1配置,其中AP2部分是由CoZFe(100-Z)/ FeYCo(100-Y)/ CoZFe(100-Z)表示的FCC三层,其中y为0至60原子% ,z为75〜100原子%。 在一个实施方案中,M是厚度为0.5至50埃的Cu,S是厚度为1至50埃的ZnO。 S层可以掺杂有一个或多个元素。 自旋阀的dR / R比提高到10%以上,同时保持可接受的EM和RA性能。

    TMR or CPP structure with improved exchange properties
    53.
    发明授权
    TMR or CPP structure with improved exchange properties 有权
    具有改进的交换性能的TMR或CPP结构

    公开(公告)号:US07978439B2

    公开(公告)日:2011-07-12

    申请号:US11820251

    申请日:2007-06-19

    IPC分类号: G11B5/39

    摘要: An insertion layer is provided between an AFM layer and an AP2 pinned layer in a GMR or TMR element to improve exchange coupling properties by increasing Hex and the Hex/Hc ratio without degrading the MR ratio. The insertion layer may be a 1 to 15 Angstrom thick amorphous magnetic layer comprised of at least one element of Co, Fe, or Ni, and at least one element having an amorphous character selected from B, Zr, Hf, Nb, Ta, Si, or P, or a 1 to 5 Angstrom thick non-magnetic layer comprised of Cu, Ru, Mn, Hf, or Cr. Preferably, the content of the one or more amorphous elements in the amorphous magnetic layer is less than 40 atomic %. Optionally, the insertion layer may be formed within the AP2 pinned layer. Examples of an insertion layer are CoFeB, CoFeZr, CoFeNb, CoFeHf, CoFeNiZr, CoFeNiHf, and CoFeNiNbZr.

    摘要翻译: 在GMR或TMR元件中的AFM层和AP2钉扎层之间设置插入层,以通过增加Hex和Hex / Hc比来提高交换耦合性能,而不降低MR比。 插入层可以是由至少一种Co,Fe或Ni元素组成的1至15埃厚的非晶磁性层,以及至少一种具有选自B,Zr,Hf,Nb,Ta,Si ,或P,或由Cu,Ru,Mn,Hf或Cr组成的1〜5埃厚的非磁性层。 优选地,非晶磁性层中的一种或多种非晶质元素的含量小于40原子%。 可选地,插入层可以形成在AP2钉扎层内。 插入层的实例是CoFeB,CoFeZr,CoFeNb,CoFeHf,CoFeNiZr,CoFeNiHf和CoFeNiNbZr。

    Method of manufacturing a CPP structure with enhanced GMR ratio
    54.
    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

    IPC分类号: G11B5/187 C23C14/34

    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。

    TMR device with novel free layer stucture
    55.
    发明申请
    TMR device with novel free layer stucture 有权
    TMR器件具有新颖的自由层结构

    公开(公告)号:US20100177449A1

    公开(公告)日:2010-07-15

    申请号:US12319972

    申请日:2009-01-14

    IPC分类号: G11B5/33 B05D5/12

    摘要: A composite free layer having a FL1/insertion/FL2 configuration is disclosed for achieving high dR/R, low RA, and low λ in TMR or GMR sensors. Ferromagnetic FL1 and FL2 layers have (+) λ and (−) λ values, respectively. FL1 may be CoFe, CoFeB, or alloys thereof with Ni, Ta, Mn, Ti, W, Zr, Hf, Tb, or Nb. FL2 may be CoFe, NiFe, or alloys thereof with Ni, Ta, Mn, Ti, W, Zr, Hf, Tb, Nb, or B. The thin insertion layer includes at least one magnetic element such as Co, Fe, and Ni, and at least one non-magnetic element selected from Ta, Ti, W, Zr, Hf, Nb, Mo, V, Cr, or B. In a TMR stack with a MgO tunnel barrier, dR/R>60%, λ˜1×10−6, and RA=1.2 ohm-um2 when FL1 is CoFe/CoFeB/CoFe, FL2 is CoFe/NiFe/CoFe, and the insertion layer is CoTa or CoFeBTa.

    摘要翻译: 公开了具有FL1 /插入/ FL2配置的复合自由层,用于在TMR或GMR传感器中实现高dR / R,低RA和低λ。 铁磁FL1和FL2层分别具有(+)λ和( - )λ值。 FL1可以是CoFe,CoFeB或其与Ni,Ta,Mn,Ti,W,Zr,Hf,Tb或Nb的合金。 FL2可以是CoFe,NiFe或其与Ni,Ta,Mn,Ti,W,Zr,Hf,Tb,Nb或B的合金。薄插入层包括至少一种诸如Co,Fe和Ni 以及选自Ta,Ti,W,Zr,Hf,Nb,Mo,V,Cr或B中的至少一种非磁性元素。在具有MgO隧道势垒的TMR堆叠中,dR / R> 60%,λ 〜1×10-6,当FL1为CoFe / CoFeB / CoFe时,RA = 1.2ohm-um2,FL2为CoFe / NiFe / CoFe,插入层为CoTa或CoFeBTa。

    FCC-like trilayer AP2 structure for CPP GMR EM improvement
    57.
    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

    IPC分类号: C23C14/34 B05D5/12

    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
    59.
    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

    IPC分类号: G11B5/33 G11B5/127

    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。

    Process of manufacturing a TMR device
    60.
    发明授权
    Process of manufacturing a TMR device 有权
    制造TMR器件的过程

    公开(公告)号:US07497007B2

    公开(公告)日:2009-03-03

    申请号:US11181176

    申请日:2005-07-14

    IPC分类号: G11B5/187

    摘要: A high performance TMR element is fabricated by inserting an oxygen surfactant layer (OSL) between a pinned layer and AlOx tunnel barrier layer in a bottom spin valve configuration. The pinned layer preferably has a SyAP configuration with an outer pinned layer, a Ru coupling layer, and an inner pinned layer comprised of CoFeXBY/CoFeZ wherein x=0 to 70 atomic %, y=0 to 30 atomic %, and z=0 to 100 atomic %. The OSL is formed by treating the CoFez layer with oxygen plasma. The AlOx tunnel barrier has improved uniformity of about 2% across a 6 inch wafer and can be formed from an Al layer as thin as 5 Angstroms. As a result, the Hin value can be decreased by ⅓ to about 32 Oe. A dR/R of 25% and a RA of 3 ohm-cm2 have been achieved for TMR read head applications.

    摘要翻译: 通过在底部自旋阀配置中的钉扎层和AlOx隧道势垒层之间插入氧表面活性剂层(OSL)来制造高性能TMR元件。 钉扎层优选具有带外部被钉扎层,Ru耦合层和由CoFeXBY / CoFeZ组成的内部钉扎层的SyAP构型,其中x = 0至70原子%,y = 0至30原子%,z = 0 至100原子%。 通过用氧等离子体处理CoFez层形成OSL。 AlOx隧道势垒在6英寸晶片上提高了约2%的均匀性,并且可以由薄至5埃的Al层形成。 结果,Hin值可以减少1/3至约32Oe。 对于TMR读头应用,已经实现了25%的dR / R和3ohm-cm 2的RA。