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：US07345854B2

公开(公告)日：2008-03-18

申请号：US10889912

申请日：2004-07-13

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/3903 ,  G11B5/39 ,  G11B5/3932

摘要： A method for fabricating a spin-valve GMR sensor having a reference layer with a magnetic moment that moves in an opposite direction to that of the free layer in the presence of external magnetic field transitions. The reference layer is a part of a three ferromagnetic layer structure, including pinned, intermediate and reference layers, that when the layers are taken pairwise and separated by spacer layers, includes a strongly exchange coupled synthetic ferrimagnetic pinned and intermediate layer pair and a weakly exchange coupled synthetic ferrimagnetic intermediate and reference layer pair. The reference layer, because of its weak coupling to the intermediate layer, has a magnetic moment that is free to move. During sensor operation, the reference layer and free layer move in opposite directions under the influence of external magnetic field transitions The novel three layer structure provides a sensor of increased sensitivity for a given track width.

摘要翻译： 一种用于制造自旋阀GMR传感器的方法，其具有在存在外部磁场转变的情况下具有与自由层相反方向移动的磁矩的参考层。 参考层是三个铁磁层结构的一部分，包括钉扎，中间和参考层，当层被取代成一对并且被间隔层分开时，包括强交换耦合的合成亚铁磁性钉扎和中间层对以及弱交换 耦合合成亚铁磁中间体和参考层对。 参考层由于与中间层的弱耦合而具有可自由移动的磁矩。 在传感器运行期间，参考层和自由层在外部磁场过渡的影响下以相反的方向移动。新颖的三层结构为给定的轨道宽度提供了增加灵敏度的传感器。

公开(公告)号：US07336441B2

公开(公告)日：2008-02-26

申请号：US11493775

申请日：2006-07-26

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/39

CPC分类号： G11B5/147 ,  G11B5/33

摘要： A planar top yoke in a magnetic write head is disclosed. The top yoke includes a backside region and a second pole tip region that is thinner than the backside region and forms a step at the ABS. Alternatively, a front section of the backside region includes a step with a thickness greater than the second pole tip region. Therefore, flux is directed from a thicker backside region toward the gap side of the second pole tip layer near the ABS. A lower flux density is formed at the top of the step at the ABS which reduces the flank field/gap field ratio and prevents unwanted erasure of adjacent data tracks. A high gap field is achieved while maintaining a low flank field during high write current conditions. The step recess from the ABS toward the backside region is about 0.2 to 2 microns.

摘要翻译： 公开了磁写头中的平面顶轭。 顶部磁轭包括背面区域和比背面区域薄的第二极尖端区域，并在ABS处形成台阶。 或者，背侧区域的前部包括具有大于第二极尖端区域的厚度的台阶。 因此，焊剂从较厚的背面区域朝向ABS附近的第二极尖端层的间隙侧引导。 在ABS的台阶顶部形成较低的通量密度，其降低了侧面场/间隙场比，并且防止相邻数据轨道的不必要的擦除。 在高写入电流条件期间，在保持低侧面场的同时实现高间隙场。 从ABS向后侧区域的台阶凹槽为约0.2至2微米。

公开(公告)号：US07275304B2

公开(公告)日：2007-10-02

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 ,  G11B5/33

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：US07253990B2

公开(公告)日：2007-08-07

申请号：US10789076

申请日：2004-02-27

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/147

CPC分类号： G11B5/1278

摘要： To generate a high data transfer rate from a magnetic write head, a faster flux rise time is needed. This often brings about severe excess saturation of the head and, as a result, adjacent track erasures often occur. This problem has been overcome by indenting P1 away from the ABS so that there is a narrowing of P1 near, but not all the way to, the write gap. This causes the excess flux associated with high write currents to be diverted into P2 instead the P1 shoulder.

摘要翻译： 为了从磁写头产生高数据传输速率，需要更快的通量上升时间。 这通常会导致头部的严重过度饱和，因此经常发生相邻的轨迹擦除。 这个问题已经通过将P 1从ABS压出而被克服，使得P 1在写入间隙附近有一个变窄，但并不是一直到达。 这导致与高写入电流相关联的过量磁通转向P 2而不是P 1肩。

公开(公告)号：US20060262445A1

公开(公告)日：2006-11-23

申请号：US11493775

申请日：2006-07-26

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/00

CPC分类号： G11B5/147 ,  G11B5/33

摘要： A planar top yoke in a magnetic write head is disclosed. The top yoke includes a backside region and a second pole tip region that is thinner than the backside region and forms a step at the ABS. Alternatively, a front section of the backside region includes a step with a thickness greater than the second pole tip region. Therefore, flux is directed from a thicker backside region toward the gap side of the second pole tip layer near the ABS. A lower flux density is formed at the top of the step at the ABS which reduces the flank field/gap field ratio and prevents unwanted erasure of adjacent data tracks. A high gap field is achieved while maintaining a low flank field during high write current conditions. The step recess from the ABS toward the backside region is about 0.2 to 2 microns.

公开(公告)号：US20060012924A1

公开(公告)日：2006-01-19

申请号：US10889912

申请日：2004-07-13

申请人： Kenichi Takano

发明人： Kenichi Takano

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/3903 ,  G11B5/39 ,  G11B5/3932

摘要： A method for fabricating a spin-valve GMR sensor having a reference layer with a magnetic moment that moves in an opposite direction to that of the free layer in the presence of external magnetic field transitions. The reference layer is a part of a three ferromagnetic layer structure, including pinned, intermediate and reference layers, that when the layers are taken pairwise and separated by spacer layers, includes a strongly exchange coupled synthetic ferrimagnetic pinned and intermediate layer pair and a weakly exchange coupled synthetic ferrimagnetic intermediate and reference layer pair. The reference layer, because of its weak coupling to the intermediate layer, has a magnetic moment that is free to move. During sensor operation, the reference layer and free layer move in opposite directions under the influence of external magnetic field transitions The novel three layer structure provides a sensor of increased sensitivity for a given track width.

摘要翻译： 一种用于制造自旋阀GMR传感器的方法，其具有在存在外部磁场转变的情况下具有与自由层相反方向移动的磁矩的参考层。 参考层是三个铁磁层结构的一部分，包括钉扎，中间和参考层，当层被取代成一对并且被间隔层分开时，包括强交换耦合的合成亚铁磁性钉扎和中间层对以及弱交换 耦合合成亚铁磁中间体和参考层对。 参考层由于与中间层的弱耦合而具有可自由移动的磁矩。 在传感器运行期间，参考层和自由层在外部磁场过渡的影响下以相反的方向移动。新颖的三层结构为给定的轨道宽度提供了增加灵敏度的传感器。

公开(公告)号：US06522502B1

公开(公告)日：2003-02-18

申请号：US09544303

申请日：2000-04-06

申请人： Masashi Shiraishi ,  Izumi Nomura ,  Tsutomu Aoyama ,  Isamu Sato ,  Masanori Sakai ,  Tsuyoshi Umehara ,  Kenichi Takano ,  Haruyuki Morita

发明人： Masashi Shiraishi ,  Izumi Nomura ,  Tsutomu Aoyama ,  Isamu Sato ,  Masanori Sakai ,  Tsuyoshi Umehara ,  Kenichi Takano ,  Haruyuki Morita

IPC分类号： G11B555

CPC分类号： G11B5/486 ,  G11B5/012 ,  G11B5/40 ,  G11B5/4806 ,  G11B5/6011 ,  G11B33/142

摘要： There is disclosed a magnetic disc device wherein temperature increase in the head IC chip can effectively suppressed. The magnetic head device comprises a slider having a magnetic head, a suspension structure having one end supporting the slider, and a head IC chip, the head IC chip being mounted on the suspension structure at a side adapted to be faced to a magnetic recording disc. A flow of air produced by the rotation of the magnetic disc cols the head IC chip in operation.

摘要翻译： 公开了一种磁盘装置，其中可以有效地抑制头IC芯片中的温度升高。 磁头装置包括具有磁头的滑块，具有支撑滑动件的一端的悬架结构以及头部IC芯片，头部IC芯片安装在悬挂结构的适于面对磁记录盘的一侧 。 通过磁盘的旋转而产生的空气流动使头IC芯片工作。

公开(公告)号：US08416649B2

公开(公告)日：2013-04-09

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： G11B11/00

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：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。