公开(公告)号：US08134802B2

公开(公告)日：2012-03-13

申请号：US12589829

申请日：2009-10-29

申请人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

发明人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3967 ,  G11B2005/0005

摘要： A sloped reader is disclosed that reduces skew between reader and written transitions in shingled writing. The reader is formed between surfaces of S1 and S2 shields that are aligned parallel to the sloped reader. A PMR writer is described that straightens transition curvature and reduces signal-to-noise ratio in shingled writing. In one embodiment, a symmetrical writer with a bowed trailing edge where two corners have a greater pole height than a center portion may be used for either right corner or left corner shingled writing. In a second embodiment, an asymmetrical writer is formed with a straight and sloped trailing edge such that the write corner has a greater pole height than the opposite corner on the trailing edge. The bowed angle in the symmetrical writer and slope angle in the asymmetrical writer is between 5 and 45 degrees and preferably between 10 and 30 degrees.

摘要翻译： 公开了一种倾斜的读取器，其减少读写器与书写的转换之间的偏差。 读取器形成在平行于倾斜的读取器的S1和S2屏蔽的表面之间。 描述了一种PMR写入器，用于矫正转换曲率并降低带状写入中的信噪比。 在一个实施例中，具有弓形后缘的对称写入器，其中两个角具有比中心部分更大的极高度，可以用于右拐角或左角贴图写入。 在第二实施例中，非对称写入器形成为具有直的和倾斜的后缘，使得写入角具有比后缘上的相对角更大的极高度。 对称写入器中的弯曲角度和不对称写入器中的倾斜角度在5度到45度之间，最好在10度到30度之间。

公开(公告)号：US20120057257A1

公开(公告)日：2012-03-08

申请号：US13373251

申请日：2011-11-09

申请人： Kenichi Takano ,  Lijie Guan ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek

发明人： Kenichi Takano ,  Lijie Guan ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek

IPC分类号： G11B5/147 ,  B05D1/36 ,  B05D5/00

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/147 ,  G11B5/3143

摘要： A laminated write pole layer for a PMR write head is disclosed in which a plurality of “n” magnetic layers and “n−1” non-magnetic spacers are formed in an alternating fashion on a substrate. The non-magnetic spacers promote exchange decoupling or antiferromagnetic coupling between adjacent magnetic layers. Writability is improved when the trailing magnetic layer has a thickness greater than the thickness of other magnetic layers and preferably >25% of the total thickness of the magnetic layers. The thicknesses of the other magnetic layers may be equal or may become progressively smaller with increasing distance from the trailing magnetic layer. In another embodiment, the non-magnetic spacer between the trailing magnetic layer and the nearest magnetic layer is replaced by a magnetic spacer made of a soft magnetic material to promote magnetic coupling and effectively increase the thickness of the trailing magnetic layer.

摘要翻译： 公开了一种用于PMR写入头的层叠写入极层，其中在衬底上以交替的方式形成多个“n”个磁性层和“n-1”个非磁性间隔物。 非磁性间隔物促进相邻磁性层之间的交换去耦或反铁磁耦合。 当后磁性层的厚度大于其它磁性层的厚度，优选磁性层的总厚度的25％时，写入性能得到改善。 其他磁性层的厚度可以相等或随着与后磁性层的距离的增加而逐渐变小。 在另一个实施例中，后磁性层和最近的磁性层之间的非磁性间隔物被由软磁材料制成的磁性隔离层代替，以促进磁耦合并有效地增加后磁层的厚度。

公开(公告)号：US20120008229A1

公开(公告)日：2012-01-12

申请号：US12803874

申请日：2010-07-08

申请人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

发明人： Yuchen Zhou ,  Tobias Maletzky ,  Xuhui Jin ,  Zhigang Bai ,  Kenichi Takano ,  Erhard Schreck

IPC分类号： G11B5/02 ,  G11B5/127

CPC分类号： G11B5/314 ,  B82Y20/00 ,  G02B6/1226 ,  G11B5/3163 ,  G11B5/6088 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a magnetic core plasmon antenna to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the maximum gradient and value of the magnetic recording field should be at a point of the magnetic medium that is as close as possible to the point being heated. In addition, the coupling between the optical mode and the plasmon mode should be efficient so that maximum energy is transmitted to the medium. The present invention achieves both these objects by surrounding the magnetic core of a plasmon antenna by a variable thickness plasmon generating layer, whose thinnest and shortest portion is at the ABS end of the TAMR head and whose thickest and longest portion efficiently couples to the optical mode of a waveguide to produce a plasmon.

摘要翻译： TAMR（热辅助磁记录）写头使用磁芯等离子体天线中的激光产生的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。 为了使TAMR头能够最有效地运行，磁记录场的最大梯度和值应当在尽可能接近被加热点的磁介质的一个点处。 另外，光模式和等离子体激元模式之间的耦合应该是有效的，从而将最大能量传输到介质。 本发明通过可变厚度等离子体发生层围绕等离子体激元天线的磁芯来实现这两个目的，其最薄和最短部分在TAMR头的ABS端，并且其最厚和最长部分有效地耦合到光学模式 的波导产生等离子体激元。

公开(公告)号：US20110308074A1

公开(公告)日：2011-12-22

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

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

摘要： A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material 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 comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged 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 %. AFM-FM phase change material may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

摘要翻译： 公开了一种PMR写入器，其在非写入期间最小化磁极擦除，并且通过在非写入期间处于AFM状态的AFM-FM相变材料的写入期间写入字段最大化并且在写入期间通过加热切换到FM状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 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）。 AFM-FM相变材料也可以用作磁通门，以防止磁轭磁通泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

公开(公告)号：US20110279920A1

公开(公告)日：2011-11-17

申请号：US12800194

申请日：2010-05-11

申请人： Kenichi Takano ,  Joe Smyth ,  Erhard Schreck

发明人： Kenichi Takano ,  Joe Smyth ,  Erhard Schreck

IPC分类号： G11B5/10

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

摘要： Improved spatial resolution during TAMR has been achieved by shaping the write pole to have a lower surface that slopes away from the surface of the recording medium, starting at, or near, the pole's leading edge. The approach may be used for simple or compound (stitched) poles.

摘要翻译： 通过使写入极通过成形使具有从磁极的前缘开始或接近磁极的边缘的表面离开记录介质的表面的下表面来实现TAMR期间的改进的空间分辨率。 该方法可用于简单或复合（缝合）极。

公开(公告)号：US20110216447A1

公开(公告)日：2011-09-08

申请号：US12660819

申请日：2010-03-03

申请人： Min Li ,  Cherng-Chyi Han ,  Kenichi Takano ,  Joe Smyth

发明人： Min Li ,  Cherng-Chyi Han ,  Kenichi Takano ,  Joe Smyth

IPC分类号： G11B5/33 ,  G03F7/20

CPC分类号： G11B5/314 ,  G11B5/1278 ,  G11B2005/0024

摘要： A microwave assisted magnetic recording writer is disclosed with an octagonal write pole having a top portion including a trailing edge that is self aligned to a spin transfer oscillator (STO). Leading and trailing edges are connected by two sidewalls each having three sections. A first section on each side is coplanar with the STO sidewalls and is connected to a sloped second section at a first corner. Each second section is connected to a third section at a second corner where the distance between second corners is greater than the distance between first corners. A method of forming the writer begins with a trapezoidal shaped write pole in an insulation layer. Two ion beam etch (IBE) steps are used to shape top and middle portions of the write pole and narrow the pole width to

摘要翻译： 公开了一种具有八角写磁极的微波辅助磁记录装置，其具有包括与自旋转移振荡器（STO）自对准的后沿的顶部。 前缘和后缘由具有三个部分的两个侧壁连接。 每侧的第一部分与STO侧壁共面，并且在第一角处连接到倾斜的第二部分。 每个第二部分连接到第二角处的第三部分，其中第二角之间的距离大于第一角之间的距离。 一种形成写入器的方法从绝缘层中的梯形写入极开始。 使用两个离子束蚀刻（IBE）步骤来形成写入极的顶部和中间部分，并且将极宽度窄化到<50nm而不破裂。 最后，在STO上形成一个后挡板。

公开(公告)号：US08004794B2

公开(公告)日：2011-08-23

申请号：US11894494

申请日：2007-08-21

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 ,  G11B5/147

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

摘要： A PMR writer is disclosed that minimizes pole erasure during non-writing and maximize write field during writing through an AFM-FM phase change material 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 comprised of a laminated structure having a plurality of “n” ferromagnetic layers and “n−1” AFM-FM phase change material layers arranged 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 %. AFM-FM phase change material may also be used as a flux gate to prevent yoke flux from leaking into the write pole tip. Heating for the AFM to FM transition is provided by write coils and/or a coil located near the AFM-FM phase change material to enable faster transition times.

摘要翻译： 公开了一种PMR写入器，其在非写入期间最小化磁极擦除，并且通过在非写入期间处于AFM状态的AFM-FM相变材料的写入期间写入字段最大化并且在写入期间通过加热切换到FM状态。 包括写极的主极层可以由具有多个“n”个铁磁层和“n-1”个AFM-FM相变材料层的交替排列的层压结构构成。 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）。 AFM-FM相变材料也可以用作磁通门，以防止磁轭磁通泄漏到写极尖端。 AFM到FM转换的加热由位于AFM-FM相变材料附近的写入线圈和/或线圈提供，以实现更快的转换时间。

公开(公告)号：US20110181988A1

公开(公告)日：2011-07-28

申请号：US13066099

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： G11B5/39

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

摘要： A method is disclosed for forming a magnetic shield in which all domain patterns and orientations are stable and which are consistently repeated each time said shield is exposed to an initialization field. The shield is given a 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 one another. Most, though not all, of these shapes are variations on trapezoids.

摘要翻译： 公开了一种用于形成磁屏蔽的方法，其中所有的畴图案和取向都是稳定的，并且每当所述屏蔽暴露于初始化场时，它一直被重复。 屏蔽体具有一种形状，其确保所有闭合区域能够相对于初始化方向以缩小的角度对准它们，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：US20110181979A1

公开(公告)日：2011-07-28

申请号：US12657637

申请日：2010-01-25

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

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

IPC分类号： G11B5/02

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/001 ,  G11B2005/0021

摘要： A TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a plasmon generator to locally heat a magnetic recording medium and reduce its coercivity and magnetic anisotropy. To enable the TAMR head to operate most effectively, the antenna is formed in three portions, a wide portion of uniform horizontal area, a tapered portion tapering towards the ABS of the write head and a narrow tip extending from the tapered portion to the ABS. The wide portion enhances coupling of optical radiation from a waveguide to surface plasmons generated within the generator, the tapered portion condenses and focuses the plasmons as they propagate towards the ABS and the narrow tip further focuses the surface plasmon field at the medium surface.

摘要翻译： TAMR（热辅助磁记录）写头使用等离子体发生器中的光学激光器产生的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。 为了使TAMR头能够最有效地工作，天线形成为三个部分，宽度均匀的水平区域，朝向写入头的ABS渐缩的锥形部分和从锥形部分延伸到ABS的窄尖端。 宽部分增强了来自波导的光辐射与在发生器内产生的表面等离子体激元的耦合，锥形部分在等离子体激元朝向ABS传播时冷凝并聚焦等离子体，并且窄尖端进一步将中等表面的表面等离子体场聚焦。

公开(公告)号：US20110102942A1

公开(公告)日：2011-05-05

申请号：US12589829

申请日：2009-10-29

申请人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

发明人： Zhigang Bai ,  Yan Wu ,  Kenichi Takano

IPC分类号： G11B5/127 ,  B44C1/22

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3967 ,  G11B2005/0005

摘要： A sloped reader is disclosed that reduces skew between reader and written transitions in shingled writing. The reader is formed between surfaces of S1 and S2 shields that are aligned parallel to the sloped reader. A PMR writer is described that straightens transition curvature and reduces signal-to-noise ratio in shingled writing. In one embodiment, a symmetrical writer with a bowed trailing edge where two corners have a greater pole height than a center portion may be used for either right corner or left corner shingled writing. In a second embodiment, an asymmetrical writer is formed with a straight and sloped trailing edge such that the write corner has a greater pole height than the opposite corner on the trailing edge. The bowed angle in the symmetrical writer and slope angle in the asymmetrical writer is between 5 and 45 degrees and preferably between 10 and 30 degrees.

摘要翻译： 公开了一种倾斜的读取器，其减少了读写器与书写的转换之间的偏差。 读取器形成在平行于倾斜的读取器的S1和S2屏蔽的表面之间。 描述了一种PMR写入器，用于矫正转换曲率并降低带状写入中的信噪比。 在一个实施例中，具有弓形后缘的对称写入器，其中两个角具有比中心部分更大的极高度，可以用于右拐角或左角贴图写入。 在第二实施例中，非对称写入器形成为具有直的和倾斜的后缘，使得写入角具有比后缘上的相对角更大的极高度。 对称写入器中的弯曲角度和不对称写入器中的倾斜角度在5度到45度之间，最好在10度到30度之间。