公开(公告)号：US08881376B2

公开(公告)日：2014-11-11

申请号：US13199179

申请日：2011-08-22

申请人： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

发明人： Yuchen Zhou ,  Kenichi Takano ,  Kowang Liu ,  Kunliang Zhang ,  Liejie Guan ,  Moris Dovek ,  Joe Smyth

IPC分类号： G11B5/127 ,  G11B5/21 ,  G11B5/31 ,  G11B5/147

CPC分类号： G11B5/3113 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3146 ,  Y10T29/49032 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044

摘要： A method of manufacturing a PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing by including an AFM-FM phase change material spacer that is in an AFM state during non-writing and switches to a FM state by heating during writing. The main pole layer including the write pole may be formed as a laminated structure by a sputter deposition process wherein a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers are laid down in an alternating manner. The AFM-FM phase change material is preferably a FeRh or FeRhX alloy (X=Pt, Pd, or Ir) having a Rh content >35 atomic %, and may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip.

摘要翻译： 公开了一种制造PMR写入器的方法，其在非写入期间使磁极擦除最小化，并且在写入期间使写入场最大化，包括在非写入期间处于AFM状态的AFM-FM相变材料间隔物，并且通过 书写过程中加热。 包括写极的主极层可以通过溅射沉积工艺形成为层叠结构，其中以交替的方式放置多个“n”个铁磁层和“n-1”个AFM-FM相变材料层。 AFM-FM相变材料优选为Rh含量> 35原子％的FeRh或FeRhX合金（X = Pt，Pd或Ir），并且还可以用作磁通门以防止磁轭焊剂泄漏到 写极点。

公开(公告)号：US08503271B2

公开(公告)日：2013-08-06

申请号：US13551670

申请日：2012-07-18

申请人： Yuchen Zhou ,  Kenichi Takano ,  Xuhui Jin ,  Erhard Schreck ,  Moris Dovek ,  Joe Smyth

发明人： Yuchen Zhou ,  Kenichi Takano ,  Xuhui Jin ,  Erhard Schreck ,  Moris Dovek ,  Joe Smyth

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/02 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021 ,  Y10T29/49032

摘要： A method of forming a TAMR (Thermal Assisted Magnetic Recording) write head that uses the energy of optical-laser generated edge plasmons in a plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. The method incorporates forming a magnetic core within the plasmon antenna, so the antenna effectively becomes an extension of the magnetic pole and produces a magnetic field whose maximum gradient overlaps the region being heated by the edge plasmons generated in the conducting layer of the antenna surrounding the antenna's magnetic core.

摘要翻译： 一种形成TAMR（热辅助磁记录）写头的方法，其使用等离子体激元中的激光产生的边缘等离子体激元的能量来局部加热磁记录介质并降低其矫顽力和磁各向异性。 该方法包括在等离子体激元天线内形成磁芯，因此天线有效地成为磁极的延伸，并产生磁场，其最大梯度与被天线周围的天线导电层中产生的边缘等离子体激发加热的区域重叠 天线的磁芯。

公开(公告)号：US08432639B2

公开(公告)日：2013-04-30

申请号：US12800039

申请日：2010-05-06

申请人： Yan Wu ,  Kenichi Takano ,  Moris Dovek

发明人： Yan Wu ,  Kenichi Takano ,  Moris Dovek

IPC分类号： G11B5/10 ,  G11B5/31

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3163

摘要： A perpendicular magnetic recording (PMR) head is fabricated with a pole tip shielded laterally by a pair of symmetrically separated side shields that extend from an edge of a trailing edge shield to form a shield with the shape of a π. The easy axis direction of the side shields is in the in-track direction. As a result, the side shields effectively shield the fringing fields of the magnetic pole tip from causing adjacent track erasures, while not adding their own fringing fields that could cause erasures even beyond adjacent tracks.

摘要翻译： 垂直磁记录（PMR）头被制造成具有由一对对称分离的侧屏蔽横向屏蔽的极尖，该侧屏从后缘屏蔽的边缘延伸以形成具有pi形状的屏蔽。 侧面屏蔽的易轴方向处于轨道内方向。 结果，侧面屏蔽物有效地屏蔽磁极尖端的边缘区域而引起相邻的轨迹擦除，同时不添加它们自己的边缘区域，甚至可能导致相邻轨道之间的擦除。

公开(公告)号：US08369189B2

公开(公告)日：2013-02-05

申请号：US13066420

申请日：2011-04-14

申请人： Xuhui Jin ,  Yuchen Zhou ,  Kenichi Takano ,  Joe Smyth

发明人： Xuhui Jin ,  Yuchen Zhou ,  Kenichi Takano ,  Joe Smyth

IPC分类号： G11B11/00

CPC分类号： G11B5/84 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/314 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) writer has a narrow pole tip with a trailing edge magnetic shield. The narrow pole tipped write head uses the energy of laser generated edge plasmons, formed in a plasmon generating layer, to locally heat a PMR magnetic recording medium below its Curie temperature, Tc. When combined with the effects of the narrow tip, this local heating to a temperature below Tc is sufficient to create good transitions and narrow track widths in the magnetic medium. The write head is capable of writing effectively on state-of-the-art PMR recording media having Hk of 20 kOe or more.

摘要翻译： TAMR（热辅助磁记录）写入器具有带有后缘磁屏蔽的窄极端。 窄极尖写头使用在等离子体发生层中形成的激光产生的边缘等离子体激元的能量来局部加热低于其居里温度Tc的PMR磁记录介质。 当与窄尖端的作用相结合时，这种局部加热到低于Tc的温度足以在磁性介质中产生良好的转变和窄的轨道宽度。 写头能够有效地写入具有20kOe以上Hk的最先进的PMR记录介质。

公开(公告)号：US08059496B1

公开(公告)日：2011-11-15

申请号：US12804232

申请日：2010-07-16

申请人： Yuchen Zhou ,  Xuhui Jin ,  Kenichi Takano ,  Moris Dovek ,  Tobias Maletzky ,  Erhard Schreck ,  Joe Smyth

发明人： Yuchen Zhou ,  Xuhui Jin ,  Kenichi Takano ,  Moris Dovek ,  Tobias Maletzky ,  Erhard Schreck ,  Joe Smyth

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0021

摘要： Various embodiments of a TAMR head having a magnetic core antenna (MCA) with a recessed plasmon layer are disclosed. An end of the plasmon layer is separated from the ABS by a magnetic layer that transmits the plasmon mode from the plasmon layer and transmits magnetic flux from an adjacent main pole layer. Both of the MCA and magnetic layer may have a triangular shape from an ABS view. There may be a non-magnetic separation layer between the MCA magnetic core and the main pole. Furthermore, a magnetic shield may be included with a side at the ABS, a side facing an end of a waveguide that transmits electromagnetic radiation to the MCA, and a side facing an edge of the plasmon layer. The recessed plasmon layer allows an improved overlay of the thermal heating spot on the magnetic field gradient at the magnetic medium that provides better TAMR performance.

摘要翻译： 公开了具有带凹陷等离子体层的磁芯天线（MCA）的TAMR磁头的各种实施例。 等离子体激元层的一端通过从等离子体激元层传输等离子体模式的磁层与ABS分离，并从相邻的主极层传输磁通量。 从ABS观点来看，MCA和磁性层都可以具有三角形形状。 在MCA磁芯和主极之间可能存在非磁性分离层。 此外，在ABS的一侧可以包括磁屏蔽，面向朝向MCA的电磁辐射的波导的端部的一侧以及面向等离子体层的边缘的一侧。 凹入的等离子体膜层允许在磁介质上的磁场梯度上的热加热点的改进的叠加，从而提供更好的TAMR性能。

公开(公告)号：US20110188156A1

公开(公告)日：2011-08-04

申请号：US13066084

申请日：2011-04-06

申请人： Glen Garfunkel ,  Moris Dovek ,  Kenichi Takano ,  Joseph Smyth ,  Yuchen Zhou

发明人： Glen Garfunkel ,  Moris Dovek ,  Kenichi Takano ,  Joseph Smyth ,  Yuchen Zhou

IPC分类号： G11B5/11

CPC分类号： G11B5/11 ,  G11B5/3146 ,  G11B5/3912

摘要： A magnetic shield in which all domain patterns and orientations are stable and which are consistently repeated each time the shield is exposed to an initialization field, is disclosed. This is achieved by giving it a suitable shape which ensures that all closure domains can align themselves at a reduced angle relative to the initialization direction while still being roughly antiparallel to each other. Most, though not all, of these shapes are variations on trapezoids.

摘要翻译： 公开了一种磁屏蔽，其中所有域图案和取向是稳定的，并且每当屏蔽暴露于初始化场时一直重复。 这是通过赋予其合适的形状来实现的，该形状确保所有封闭区域可以相对于初始化方向以相对于初始化方向减小的角度对准它们，同时仍然彼此大致反平行。 这些形状的大部分（尽管不是全部）是梯形的变化。

公开(公告)号：US07333307B2

公开(公告)日：2008-02-19

申请号：US10613598

申请日：2003-07-03

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/33

CPC分类号： G11B5/3932

摘要： It is necessary to stabilize the free layer of GMR or TMR devices by providing a longitudinal bias field. As read tracks become very narrow, this field can drastically reduce the strength of the output signal. This problem has been overcome by adding an additional bias layer. This layer, which may be located either above or below the conventional bias layer, is permanently magnetized in the opposite direction to that of the permanent magnets used to achieve longitudinal stability. Through control of the magnetization strength and location of this additional bias layer, cancellation of much of the field induced in the free layer by the conventional bias layers is achieved.

摘要翻译： 需要通过提供纵向偏置场来稳定GMR或TMR器件的自由层。 随着读取轨迹变得非常窄，该领域可以显着降低输出信号的强度。 通过添加额外的偏置层已经克服了这个问题。 可以位于常规偏置层上方或下方的该层可以与用于实现纵向稳定性的永磁体的方向相反的方向被永久磁化。 通过控制该附加偏置层的磁化强度和位置，实现了由常规偏置层在自由层中感应的大部分场的消除。

公开(公告)号：US07307815B2

公开(公告)日：2007-12-11

申请号：US10849312

申请日：2004-05-19

申请人： Cherng-Chyi Han ,  Kenichi Takano

发明人： Cherng-Chyi Han ,  Kenichi Takano

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/3143 ,  G11B5/3163 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49048 ,  Y10T29/4906 ,  Y10T29/49062

摘要： A perpendicular magnetic recording (PMR) head with single or double coil layers has a small write shield stitched onto a main write shield. The stitched shield allows the main write pole to produce a vertical write field with sharp vertical gradients that is reduced on both sides of the write pole so that adjacent track erasures are eliminated. From a fabrication point of view, both the main pole and the stitched shield are defined and formed using a single photolithographic process, a trim mask and CMP lapping process so that the main shield can be stitched onto a self-aligned main pole and stitched shield.

摘要翻译： 具有单线圈或双线圈层的垂直磁记录（PMR）头具有缝合在主写屏蔽上的小写写屏蔽。 拼接屏蔽允许主写柱产生垂直写入场，其尖锐的垂直梯度在写入极的两侧减小，从而消除相邻的轨迹擦除。 从制造的角度来看，使用单一光刻工艺，修剪掩模和CMP研磨工艺来限定和形成主极和缝合屏蔽物，使得主屏蔽可以缝合到自对准的主极和缝合屏蔽 。

公开(公告)号：US20060196039A1

公开(公告)日：2006-09-07

申请号：US11074244

申请日：2005-03-04

申请人： Masanori Sakai ,  Kunliang Zhang ,  Kenichi Takano ,  Chyu-Jiuh Torng ,  Yunfei Li ,  Po-Kang Wang

发明人： Masanori Sakai ,  Kunliang Zhang ,  Kenichi Takano ,  Chyu-Jiuh Torng ,  Yunfei Li ,  Po-Kang Wang

IPC分类号： G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T29/49021 ,  Y10T29/49034 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49048

摘要： A hard bias (HB) structure for biasing a free layer in a MR sensor within a magnetic read head is comprised of a main biasing layer with a large negative magnetostriction (λS) value. Compressive stress in the device after lapping induces a strong in-plane anisotropy that effectively provides a longitudinal bias to stabilize the sensor. The main biasing layer is formed between two FM layers, and at least one AFM layer is disposed above the upper FM layer or below the lower FM layer. Additionally, there may be a Ta/Ni or Ta/NiFe seed layer as the bottom layer in the HB structure. Compared with a conventional abutted junction exchange bias design, the HB structure described herein results in higher output amplitude under similar asymmetry sigma and significantly decreases sidelobe occurrence. Furthermore, smaller MRWu with a similar track width is achieved since the main biasing layer acts as a side shield.

摘要翻译： 用于偏置磁读头内的MR传感器中的自由层的硬偏置（HB）结构包括具有大的负磁致伸缩（λS S S S S）值的主偏置层。 研磨后装置中的压缩应力引起强的面内各向异性，其有效地提供纵向偏压以稳定传感器。 主偏置层形成在两个FM层之间，并且至少一个AFM层设置在上FM层上方或下FM层的下方。 另外，可以存在作为HB结构中的底层的Ta / Ni或Ta / NiFe种子层。 与传统的邻接结交换偏置设计相比，本文所述的HB结构在类似的不对称西格玛下产生更高的输出幅度，并显着降低旁瓣发生。 此外，由于主偏置层用作侧屏蔽，所以实现了具有相似轨道宽度的较小MRWu。

公开(公告)号：US20050259356A1

公开(公告)日：2005-11-24

申请号：US10849312

申请日：2004-05-19

申请人： Cherng-Chyi Han ,  Kenichi Takano

发明人： Cherng-Chyi Han ,  Kenichi Takano

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/31

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/3143 ,  G11B5/3163 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49048 ,  Y10T29/4906 ,  Y10T29/49062

摘要： A perpendicular magnetic recording (PMR) head with single or double coil layers has a small write shield stitched onto a main write shield. The stitched shield allows the main write pole to produce a vertical write field with sharp vertical gradients that is reduced on both sides of the write pole so that adjacent track erasures are eliminated. From a fabrication point of view, both the main pole and the stitched shield are defined and formed using a single photolithographic process, a trim mask and CMP lapping process so that the main shield can be stitched onto a self-aligned main pole and stitched shield.

摘要翻译： 具有单线圈或双线圈层的垂直磁记录（PMR）头具有缝合在主写屏蔽上的小写写屏蔽。 拼接屏蔽允许主写柱产生垂直写入场，其尖锐的垂直梯度在写入极的两侧减小，从而消除相邻的轨迹擦除。 从制造的角度来看，使用单一光刻工艺，修剪掩模和CMP研磨工艺来限定和形成主极和缝合屏蔽物，使得主屏蔽可以缝合到自对准的主极和缝合屏蔽 。