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11. 发明授权

US08031441B2 CPP device with an enhanced dR/R ratio 有权
标题翻译：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
申请人： Kunliang Zhang , Min Li , Moris Dovek , Yue Liu
发明人： Kunliang Zhang , Min Li , Moris Dovek , Yue Liu
IPC分类号： G11B5/39
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G11B5/3906 , G11B2005/3996 , Y10T29/49039 , Y10T29/49043 , Y10T29/49044
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。

12. 发明授权

US08023218B2 Electric field assisted magnetic recording 有权
标题翻译：电场辅助磁记录
公开(公告)号：US08023218B2
公开(公告)日：2011-09-20
申请号：US12313796
申请日：2008-11-25
申请人： Yuchen Zhou , Kowang Liu , Kunliang Zhang , Erhard Schreck
发明人： Yuchen Zhou , Kowang Liu , Kunliang Zhang , Erhard Schreck
IPC分类号： G11B5/02
CPC分类号： G11B5/1278 , G11B2005/001
摘要： We describe a system for electric field assisted magnetic recording where a recordable magnetic medium includes a magnetic recording layer of high coercivity and vertical magnetic anisotropy that is adjacent to an electrostrictive layer which can be placed in a state of stress by a electric field or which is already pre-stressed and which pre-stress can be turned into strain by an electric field. When the magnetic medium is acted on simultaneously by a magnetic writing field and an electric field, the stress in the electrostrictive layer is transferred to a magnetostrictive layer which is the magnetic recording layer by itself or is coupled to the magnetic recording layer, whereupon the magnetic recording layer is made more isotropic and more easily written upon. Residual stresses in the electrostrictive layer can then be removed by an additional electric field of opposite sign to the stress-producing field.
摘要翻译：我们描述了一种用于电场辅助磁记录的系统，其中可记录磁介质包括与矫顽力层相邻的具有高矫顽力和垂直磁各向异性的磁记录层，该电致伸缩层可通过电场置于应力状态，已经预应力，哪些预应力可以通过电场变成应变。当磁介质由磁场和电场同时作用时，电致伸缩层中的应力自身转移到作为磁记录层的磁致伸缩层，或耦合到磁记录层，由此磁性记录层变得更加各向同性，更容易写入。电致伸缩层中的残余应力然后可以通过与应力产生场相反的附加电场来去除。

13. 发明授权

US07978439B2 TMR or CPP structure with improved exchange properties 有权
标题翻译：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
申请人： Kunliang Zhang , Hui-Chuan Wang , Tong Zhao , Min Li
发明人： Kunliang Zhang , Hui-Chuan Wang , Tong Zhao , Min Li
IPC分类号： G11B5/39
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G01R33/093 , G11B5/3906 , H01L43/08 , Y10T428/1114
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。

14. 发明授权

US07918014B2 Method of manufacturing a CPP structure with enhanced GMR ratio 有权
标题翻译：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。

15. 发明申请

US20100177449A1 TMR device with novel free layer stucture 有权
标题翻译： 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
申请人： Tong Zhao , Hui-Chuan Wang , Min Li , Kunliang Zhang
发明人： Tong Zhao , Hui-Chuan Wang , Min Li , Kunliang Zhang
IPC分类号： G11B5/33 , B05D5/12
CPC分类号： G11B5/3909 , B82Y10/00 , B82Y25/00 , G01R33/098 , G11B5/3906 , H01L43/08 , H01L43/10 , H01L43/12
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。

16. 发明申请

US20100172053A1 Novel hard bias design for extra high density recording 有权
标题翻译：用于超高密度记录的新型硬偏置设计
公开(公告)号：US20100172053A1
公开(公告)日：2010-07-08
申请号：US12660908
申请日：2010-03-05
申请人： Kunliang Zhang , Yun-Fei Li , Chyu-Jiuh Torng , Chen-Jung Chien
发明人： Kunliang Zhang , Yun-Fei Li , Chyu-Jiuh Torng , Chen-Jung Chien
IPC分类号： G11B5/187 , B05D1/36
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3912 , G11B5/3932 , G11B2005/3996
摘要： A hard bias structure for biasing a free layer in a MR element within a read head is comprised of a composite hard bias layer having a Co78.6Cr5.2Pt16.2/Co65Cr15Pt20 configuration. The upper Co65Cr15Pt20 layer has a larger Hc value and a thickness about 2 to 10 times greater than that of the Co78.6Cr5.2Pt16.2 layer. The hard bias structure may also include a BCC underlayer such as FeCoMo which enhances the magnetic moment of the hard bias structure. Optionally, the thickness of the Co78.6Cr5.2Pt16.2 layer is zero and the Co65Cr15Pt20 layer is formed on the BCC underlayer. The present invention also encompasses a laminated hard bias structure. The Mrt value for the hard bias structure may be optimized by adjusting the thicknesses of the BCC underlayer and CoCrPt layers. As a result, a larger process window is realized and lower asymmetry output during a read operation is achieved.
摘要翻译：用于偏置读取头内的MR元件中的自由层的硬偏置结构由具有Co78.6Cr5.2Pt16.2 / Co65Cr15Pt20配置的复合硬偏置层组成。 Co65Cr15Pt20上层具有较大的Hc值，厚度约为Co78.6Cr5.2Pt16.2层的2〜10倍。硬偏压结构还可以包括诸如FeCoMo的BCC底层，其增强了硬偏压结构的磁矩。可选地，Co78.6Cr5.2Pt16.2层的厚度为零，Co65Cr15Pt20层形成在BCC底层上。本发明还包括层压硬偏置结构。可以通过调整BCC底层和CoCrPt层的厚度来优化硬偏置结构的Mrt值。结果，实现了更大的处理窗口，并且在读取操作期间实现了较低的不对称输出。

17. 发明申请

US20100123208A1 MR device with synthetic free layer structure 有权
标题翻译：具有合成自由层结构的MR器件
公开(公告)号：US20100123208A1
公开(公告)日：2010-05-20
申请号：US12313351
申请日：2008-11-19
申请人： Tong Zhao , Hui-Chuan Wang , Yu-Chen Zhou , Min Li , Kunliang Zhang
发明人： Tong Zhao , Hui-Chuan Wang , Yu-Chen Zhou , Min Li , Kunliang Zhang
IPC分类号： H01L43/08 , H01L43/12
CPC分类号： H01L43/08 , B82Y25/00 , B82Y40/00 , G01R33/098 , G11B5/3906 , G11C11/16 , G11C11/161 , H01F10/3254 , H01F10/3272 , H01F10/3295 , H01F41/302 , H01L43/12
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。

18. 发明申请

US20090314632A1 FCC-like trilayer AP2 structure for CPP GMR EM improvement 有权
标题翻译： 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。

19. 发明授权

US07602033B2 Low resistance tunneling magnetoresistive sensor with composite inner pinned layer 有权
标题翻译：低电阻隧道磁阻传感器，具有复合内固定层
公开(公告)号：US07602033B2
公开(公告)日：2009-10-13
申请号：US11811930
申请日：2007-05-29
申请人： Tong Zhao , Hui-Chuan Wang , Kunliang Zhang , Yu-Hsia Chen , Min Li
发明人： Tong Zhao , Hui-Chuan Wang , Kunliang Zhang , Yu-Hsia Chen , Min Li
IPC分类号： H01L29/82 , H01L43/00
CPC分类号： H01L43/10 , B82Y10/00 , B82Y25/00 , B82Y40/00 , G01R33/098 , G11B5/3906 , G11B5/3909 , H01F10/3254 , H01F10/3272 , H01F10/3295 , H01F41/303 , H01L43/12
摘要： A high performance TMR sensor is fabricated by employing a composite inner pinned (AP1) layer in an AP2/Ru/AP1 pinned layer configuration. In one embodiment, there is a 10 to 80 Angstrom thick lower CoFeB or CoFeB alloy layer on the Ru coupling layer, a and 5 to 50 Angstrom thick Fe or Fe alloy layer on the CoFeB or CoFeB alloy, and a 5 to 30 Angstrom thick Co or Co rich alloy layer formed on the Fe or Fe alloy. A MR ratio of about 48% with a RA of
摘要翻译：通过在AP2 / Ru / AP1钉扎层配置中采用复合内固定（AP1）层制造高性能TMR传感器。在一个实施例中，Ru结合层上存在10至80埃厚的CoFeB或CoFeB合金层，CoFeB或CoFeB合金上为5至50埃厚的Fe或Fe合金层，厚度为5至30埃在Fe或Fe合金上形成Co或Co丰富的合金层。当在TMR堆叠中使用CoFe AP2层，MgO（NOX）隧道势垒和CoFe / NiFe自由层时，实现约48％的RA比为<2欧姆 - um2的MR比。观察到改善的RA均匀性和较少的头噪声。可选地，可以在耦合层和CoFeB或CoFeB合金层之间插入CoFe层以改善钉扎强度并增强结晶。

20. 发明授权

US07583481B2 FCC-like trilayer AP2 structure for CPP GMR EM improvement 有权
标题翻译： 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。

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