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：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：US08339751B2

公开(公告)日：2012-12-25

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，其中所有区域图案和取向是稳定的，并且每当所述屏蔽暴露于初始化场时一直被重复。 该护罩具有一种形状，其确保所有封闭区域能够相对于初始化方向以较小的角度对准自身，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：US20090034130A1

公开(公告)日：2009-02-05

申请号：US11888856

申请日：2007-08-02

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： G11B5/127 ,  G11B5/33

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 said shield is exposed to an initialization field, is disclosed. This has been 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 one another. 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一直被重复。 这已经通过赋予其合适的形状来实现，该形状确保所有封闭区域能够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：US08243399B2

公开(公告)日：2012-08-14

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： G11B5/39

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：US08233358B2

公开(公告)日：2012-07-31

申请号：US12456290

申请日：2009-06-15

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 TAMR (Thermal Assisted Magnetic Recording) write head uses the energy of optical-laser generated plasmons in a 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 of the magnetic recording field should be concentrated in the small region being heated. Typically this does not occur because the spot being heated by the antenna is offset from the position at which the magnetic pole concentrates its magnetic field. The present invention incorporates a magnetic core within a 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 edge plasmons being generated in a conducting layer surrounding the antenna's magnetic core.

摘要翻译： TAMR（热辅助磁记录）写头使用等离子体天线中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应该集中在被加热的小区域中。 通常这不会发生，因为被天线加热的点偏离磁极集中其磁场的位置。 本发明在等离子体激元天线内结合有磁芯，因此天线有效地成为磁极的延伸，并产生磁场，其最大梯度与在天线的磁芯周围的导电层中产生的边缘等离子体激元加热的区域重叠 。

公开(公告)号：US20090052092A1

公开(公告)日：2009-02-26

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： G11B5/33

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：US20090021868A1

公开(公告)日：2009-01-22

申请号：US11879952

申请日：2007-07-19

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： G11B5/33 ,  G11B5/147 ,  B05D5/12

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：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。