公开(公告)号：US20050237666A1

公开(公告)日：2005-10-27

申请号：US10831834

申请日：2004-04-26

申请人： Wen-Chien Hsiao ,  Wipul Jayasekara ,  Edward Lee ,  Vladimir Nikitin ,  Patrick Webb ,  Sue Zhang

发明人： Wen-Chien Hsiao ,  Wipul Jayasekara ,  Edward Lee ,  Vladimir Nikitin ,  Patrick Webb ,  Sue Zhang

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

CPC分类号： G11B5/1278 ,  G11B5/3143

摘要： A magnetoresistive read/write head having a first layer of alumina and a second layer of silicon dioxide overlaying a P3 layer of the head. In a preferred embodiment, the silicon dioxide layer is recessed away from an Air Bearing Surface (ABS) to reduce protrusion of a P2 layer and the P3 layer in the head, and to reduce degradation in the magnetic properties of the pole tips of the P2 and P3 layer ends.

摘要翻译： 具有第一氧化铝层和覆盖头部的P 3层的第二二氧化硅层的磁阻读写头。 在优选实施例中，二氧化硅层从空气轴承表面（ABS）凹入，以减少头部中的P 2层和P 3层的突出，并且降低磁头的磁性能的降低 P 2和P 3层结束。

公开(公告)号：US20060152849A1

公开(公告)日：2006-07-13

申请号：US11375160

申请日：2006-03-14

申请人： Wen-chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

发明人： Wen-chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

IPC分类号： G11B5/17

CPC分类号： G11B5/3136 ,  G11B5/012 ,  G11B5/17 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/40

摘要： Magnetic heads having write coil structures with reduced electrical resistances for reducing thermal protrusion are disclosed. In one illustrative example, a magnetic head includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer of the write coil extends continuously between the upper and the lower poles through a plane defined by the write gap layer. Preferably, the write coil is formed using a damascene process, such that each coil layer is wider than each coil separating layer. Such a structure provides for a relatively large amount of coil materials to be used, which reduces the coil's electrical resistance. This, in turn, reduces the heat generated by the write coils during operation. Further, either one or both of the lower and upper poles may include a horizontally laminated structure of alternating magnetic and non-magnetic dielectric layers to further reduce heating caused by eddy current losses. Since thermal protrusion is reduced, the fly height of magnetic head may be made relatively small with a reduced risk of head-to-disk crashes and disk scratches.

公开(公告)号：US20070247750A1

公开(公告)日：2007-10-25

申请号：US11411590

申请日：2006-04-25

申请人： Wen-Chien Hsiao ,  Yimin Hsu ,  Edward Lee ,  Vladimir Nikitin ,  Katalin Pentek

发明人： Wen-Chien Hsiao ,  Yimin Hsu ,  Edward Lee ,  Vladimir Nikitin ,  Katalin Pentek

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/3133 ,  G11B5/3136

摘要： A magnetic write pole having a structure that prevents thermally induced pole tip protrusion. The write head has a return pole with a magnetic pedestal formed at the air bearing surface (ABS) and a back gap at an end opposite the ABS. An electrically conductive write coil having a plurality of turns passes over the return pole. A fill layer of a material having a low coefficient of thermal expansion, such as alumina is disposed between the coil and the pedestal, and may extend over the top of the coil to the back gap. A photoresist coil insulation layer may be provided between the turns of the coil to insulate the turns of the coil from one another. The photoresist coil insulation layer can also extend to the back gap. A write pole, formed above the return pole and coil is magnetically connected with the back gap layer and return pole by a magnetic shaping layer.

摘要翻译： 具有防止热感应极尖突出的结构的磁性写入极。 写头具有在空气轴承表面（ABS）形成的磁性基座的返回极和与ABS相对的一端的后部间隙。 具有多个匝的导电写入线圈通过返回极。 具有低热膨胀系数的材料的填充层（例如氧化铝）设置在线圈和基座之间，并且可以在线圈的顶部延伸到后部间隙。 可以在线圈的匝之间设置光致抗蚀剂线圈绝缘层，以将线圈的匝彼此绝缘。 光致抗蚀剂线圈绝缘层也可以延伸到后隙。 在返回极和线圈之上形成的写极通过磁性成形层与后间隙层和返回极磁连接。

公开(公告)号：US20050024764A1

公开(公告)日：2005-02-03

申请号：US10629060

申请日：2003-07-29

申请人： Wen-Chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

发明人： Wen-Chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

IPC分类号： G11B5/17 ,  G11B5/012 ,  G11B5/31 ,  G11B5/40

CPC分类号： G11B5/3136 ,  G11B5/012 ,  G11B5/17 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/40

摘要： Magnetic heads having write coil structures with reduced electrical resistances for reducing thermal protrusion are disclosed. In one illustrative example, a magnetic head includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer of the write coil extends continuously between the upper and the lower poles through a plane defined by the write gap layer. Preferably, the write coil is formed using a damascene process, such that each coil layer is wider than each coil separating layer. Such a structure provides for a relatively large amount of coil materials to be used, which reduces the coil's electrical resistance. This, in turn, reduces the heat generated by the write coils during operation. Further, either one or both of the lower and upper poles may include a horizontally laminated structure of alternating magnetic and non-magnetic dielectric layers to further reduce heating caused by eddy current losses. Since thermal protrusion is reduced, the fly height of magnetic head may be made relatively small with a reduced risk of head-to-disk crashes and disk scratches.

摘要翻译： 公开了具有降低的电阻以减少热突起的具有写入线圈结构的磁头。 在一个说明性示例中，磁头包括磁轭; 形成在磁轭的上下极之间的写间隙层; 以及具有多个线圈层的写入线圈。 写入线圈的每个线圈层通过由写入间隙层限定的平面在上极和下极之间连续延伸。 优选地，写入线圈使用镶嵌工艺形成，使得每个线圈层比每个线圈分离层宽。 这种结构提供了相对大量的待使用的线圈材料，这降低了线圈的电阻。 这又减少了在操作期间由写入线圈产生的热量。 此外，下极和上极中的一个或两个可以包括交替的磁和非磁性介电层的水平层叠结构，以进一步减少由涡流损耗引起的加热。 由于热突起减少，所以磁头的飞行高度可以相对较小，同时降低了磁头与磁盘的碰撞和磁盘划痕的风险。

公开(公告)号：US07848061B2

公开(公告)日：2010-12-07

申请号：US11375875

申请日：2006-03-14

申请人： Wipul Jayasekara ,  Vladimir Nikitin

发明人： Wipul Jayasekara ,  Vladimir Nikitin

IPC分类号： G11B5/127

CPC分类号： G11B5/398 ,  G11B5/3935

摘要： A current perpendicular to plane (CPP) magnetoresistive sensor having a free layer that is magnetically coupled with a magnetic shield, thereby providing the free layer with a large effective flux guide. Sensor performance is improved by virtually eliminating demagnetization fields at the back edge of the sensor. The free layer can be magnetically connected with the shield by a magnetic coupling layer or shunt structure that is disposed between the free layer and the shield behind the capping layer.

摘要翻译： 垂直于平面（CPP）磁阻传感器的电流具有与磁屏蔽磁耦合的自由层，从而为自由层提供大的有效通量引导。 通过几乎消除传感器后边缘处的去磁场来提高传感器性能。 自由层可以通过设置在覆盖层后面的自由层和屏蔽层之间的磁耦合层或分流结构与屏蔽体磁连接。

公开(公告)号：US20070188939A1

公开(公告)日：2007-08-16

申请号：US11352491

申请日：2006-02-10

申请人： Robert Beach ,  Wipul Jayasekara ,  Vladimir Nikitin

发明人： Robert Beach ,  Wipul Jayasekara ,  Vladimir Nikitin

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3912 ,  G11B5/40

摘要： In a CPP MR device such as a tunnel magnetoresistive (TMR) device, shoulders that have a magnetic moment that is matched to the magnetic moments of the free layer extend between the free layer and the S2 shield to provide an electrical path from one shoulder, through the shield, to the other shoulder for dissipating edge charges. Thus, a CPP MR device may include a seed stack, a pinned stack on the seed stack, and a tunnel barrier on the pinned stack. A free stack may be on the tunnel barrier, and the free stack can include a free sublayer separated from a magnetic shield and a path for dissipating edge charges in the free stack through the magnetic shield.

摘要翻译： 在诸如隧道磁阻（TMR）器件的CPP MR器件中，具有与自由层的磁矩匹配的磁矩的肩部在自由层和S 2屏蔽之间延伸以提供从一个肩部 ，通过屏蔽，到另一肩，消散边缘电荷。 因此，CPP MR装置可以包括种子堆叠，种子堆叠上的钉扎堆叠以及钉扎堆叠上的隧道势垒。 自由堆叠可以在隧道屏障上，并且自由堆叠可以包括与磁屏蔽分离的自由子层和用于通过磁屏蔽消散自由堆叠中的边缘电荷的路径。

公开(公告)号：US20070217080A1

公开(公告)日：2007-09-20

申请号：US11375875

申请日：2006-03-14

申请人： Wipul Jayasekara ,  Vladimir Nikitin

发明人： Wipul Jayasekara ,  Vladimir Nikitin

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/398 ,  G11B5/3935

摘要： A current perpendicular to plane (CPP) magnetoresistive sensor having a free layer that is magnetically coupled with a magnetic shield, thereby providing the free layer with a large effective flux guide. Sensor performance is improved by virtually eliminating demagnetization fields at the back edge of the sensor. The free layer can be magnetically connected with the shield by a magnetic coupling layer or shunt structure that is disposed between the free layer and the shield behind the capping layer.

摘要翻译： 垂直于平面（CPP）磁阻传感器的电流具有与磁屏蔽磁耦合的自由层，从而为自由层提供大的有效通量引导。 通过几乎消除传感器后边缘处的去磁场来提高传感器性能。 自由层可以通过设置在覆盖层后面的自由层和屏蔽层之间的磁耦合层或分流结构与屏蔽体磁连接。

公开(公告)号：US07877859B2

公开(公告)日：2011-02-01

申请号：US11767330

申请日：2007-06-22

申请人： Wen-Chien Hsiao ,  Yimin Hsu ,  Vladimir Nikitin

发明人： Wen-Chien Hsiao ,  Yimin Hsu ,  Vladimir Nikitin

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/11 ,  G11B33/1493 ,  Y10T29/49021 ,  Y10T29/49028 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49155 ,  Y10T29/49165

摘要： Methods are provided for fabricating a write head with a self aligned wrap around shield and a self aligned flared region of a write pole. A flare point and a track width of a write pole may be fabricated using multiple processes. The multiple processes utilize several masking structures to define the track width and the flare point of the write pole. A mask structure is formed to cover a first portion of the write pole. An edge of the mask structure adjacent to an exposed second portion of the write pole defines a flare point of the write pole. Various structures of the write head, including shield gap layers, a wrap around shield and a flared region (e.g., the yoke) of the write pole may be fabricated from the flare point defined by the mask structure.

摘要翻译： 提供了用于制造具有围绕屏蔽件的自对准包裹和写入极的自对准扩口区域的写入头的方法。 可以使用多个工艺来制造写极点的闪点和轨道宽度。 多个过程利用几个掩模结构来定义磁道宽度和写入磁极的扩展点。 形成掩模结构以覆盖写入极的第一部分。 掩模结构的与写入极的暴露的第二部分相邻的边缘限定了写入极的扩张点。 写磁头的各种结构，包括屏蔽间隙层，环绕屏蔽层和写磁极的扩口区域（例如磁轭）可以由掩模结构限定的扩口来制造。

公开(公告)号：US20070236831A1

公开(公告)日：2007-10-11

申请号：US11399548

申请日：2006-04-06

申请人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yimin Hsu ,  Vladimir Nikitin

发明人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yimin Hsu ,  Vladimir Nikitin

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/3116 ,  G11B5/3146

摘要： Write elements are discussed having a write pole and an associated trailing shield. A leading side of the trailing shield faces a trailing side of the write pole. The leading side of the trailing shield has a shape such that a center portion of the leading side has less of a separation from the trailing side of the write pole than track edge portions of the leading side of the trailing shield. An exemplary shape the leading side of the trailing shield may be a convex shape when viewed from the ABS. The shape of the leading side of the trailing shield causes the trailing shield to shunt less of the magnetic field from the trailing side of the write pole at the track edges so that the written transition at the track edge will not lag behind the written transition at the track center allowing for a straighter transition.

摘要翻译： 讨论了具有写极点和相关联的后屏蔽的写元件。 后挡板的前端面向写极的后侧。 后挡板的前侧具有这样的形状，使得前侧的中心部分比后挡板的前侧的轨道边缘部分具有比写入极的后侧更小的间隔。 当从ABS观察时，后护罩的前侧的示例性形状可以是凸形。 尾部屏蔽的前端的形状使得后屏蔽件在轨道边缘处从写入极的后侧分流较少的磁场，使得在轨道边缘处的写入的转变不会滞后于在 轨道中心允许更直接的过渡。

公开(公告)号：US07154696B2

公开(公告)日：2006-12-26

申请号：US10777522

申请日：2004-02-11

申请人： Vladimir Nikitin ,  Savas Gider ,  Wen-chien Hsiao

发明人： Vladimir Nikitin ,  Savas Gider ,  Wen-chien Hsiao

IPC分类号： G11B5/60 ,  G11B21/21

CPC分类号： G11B5/3136 ,  G11B5/6005

摘要： A new structure for adjusting flying height using a magnetomechanical effect. A head includes a magnetomechanically active structure and a coil coupled to the magnetomechanically active structure, the magnetomechanically active structure responding to a magnetic field generated by the coil to expand and/or contract.

摘要翻译： 使用磁力机械效应调整飞行高度的新结构。 磁头包括磁机械有源结构和耦合到磁机械有源结构的线圈，响应于由线圈产生的用于扩展和/或收缩的磁场的磁机械有源结构。