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21.发明授权Perpendicular magnetic write head with shunt structure to prevent read sensor interference 有权垂直磁头，分流结构，防止读取传感器干扰公开(公告)号：US07639453B2
公开(公告)日：2009-12-29
申请号：US11497202
申请日：2006-08-01
申请人： Hardayal Singh Gill , Kuok San Ho , Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
发明人： Hardayal Singh Gill , Kuok San Ho , Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
IPC分类号： G11B5/127
CPC分类号： G11B5/3123 , G11B5/1278 , G11B5/3967
摘要： A magnetic head structure for use in perpendicular magnetic recording. The magnetic head includes a magnetic write head having a return pole with a magnetic shunt structure extending from the back end opposite the ABS. The magnetic shunt structure prevents magnetic field from the write coil from reaching and affecting the read head. More specifically the shunt structure prevents magnetic field from the portion of the write coil beyond the back gap (as measured from the ABS) from magnetizing a magnetic shield of the read head. The shunt structure is also configured so as to avoid stray field writing. The size and shape of the shunt structure is therefore, limited to avoid attracting stray fields that might cause such stray field writing.
摘要翻译： 用于垂直磁记录的磁头结构。 磁头包括具有从与ABS相对的后端延伸的磁分路结构的返回极的磁写头。 磁分路结构防止来自写入线圈的磁场到达并影响读取头。 更具体地说，分流结构防止来自写入线圈的部分的磁场超过后隙（从ABS测量）来磁化读取磁头的磁屏蔽。 分流结构也被配置为避免杂散场写入。 因此，分流结构的尺寸和形状受到限制，以避免吸引可能导致这种杂散场写入的杂散场。
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22.发明授权Magnetoresistive sensor having shape enhanced pinning, a flux guide structure and damage free virtual edges 有权具有形状增强钉扎，磁通导向结构和无损虚拟边缘的磁阻传感器公开(公告)号：US07580230B2
公开(公告)日：2009-08-25
申请号：US11588013
申请日：2006-10-24
CPC分类号： G11B5/3932 , B82Y10/00 , B82Y25/00 , G11B5/3163 , G11B2005/3996
摘要： A magnetoresistive sensor having a shape enhanced pinning and a flux guide structure. First and second hard bias layers and lead layers extend from the sides of a sensor stack. The hard bias layers and leads have a stripe height that is smaller than the stripe height of a free layer, resulting in a free layer that extends beyond the back edge of the lead and hard bias layer. This portion of the free layer that extends beyond the back edge of the leads and hard bias layers provides a back flux guide. Similarly, the sensor may have a free layer that extends beyond the front edge of the lead and hard bias layers to provide a front flux guide. The pinned layer extends significantly beyond the back edge of the free layer, providing the pinned layer with a strong shape enhanced magnetic anisotropy.
摘要翻译： 具有形状增强的钉扎和磁通引导结构的磁阻传感器。 第一和第二硬偏压层和引线层从传感器堆叠的侧面延伸。 硬偏压层和引线具有小于自由层的条带高度的条纹高度，导致延伸超过引线和硬偏置层的后边缘的自由层。 自由层的延伸超过引线和硬偏置层的后边缘的部分提供了反向通量引导件。 类似地，传感器可以具有延伸超过引线和硬偏置层的前边缘的自由层，以提供前通量引导件。 被钉扎层明显地延伸超过自由层的后边缘，为钉扎层提供强的形状增强的磁各向异性。
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公开(公告)号：US20090165286A1
公开(公告)日：2009-07-02
申请号：US11966106
申请日：2007-12-28
IPC分类号： G11B5/127
CPC分类号： G11B5/3163 , B82Y25/00 , G01R33/093 , G11B5/398 , Y10T29/49021 , Y10T29/49032 , Y10T29/49039 , Y10T29/49043 , Y10T29/49044
摘要： A method for manufacturing a magnetoresistive sensor that decreases the stack height of the sensor. The method includes forming a sensor structure having at its top, a Ru layer and a Ta layer over the Ru layer. An annealing process is performed to set the magnetization of the pinned layer of the sensor structure. After the annealing process has been completed and the Ta layer is no longer needed, an ion milling process is performed to remove the Ta layer.
摘要翻译： 一种降低传感器堆叠高度的磁阻传感器的制造方法。 该方法包括形成传感器结构，其顶部具有在Ru层上的Ru层和Ta层。 执行退火处理以设置传感器结构的钉扎层的磁化。 在完成退火处理并且不再需要Ta层之后，执行离子铣削处理以去除Ta层。
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24.发明申请Magnetoresistive sensor having shape enhanced pinning, a flux guide structure and damage free virtual edges 有权具有形状增强钉扎，磁通导向结构和无损虚拟边缘的磁阻传感器公开(公告)号：US20080094761A1
公开(公告)日：2008-04-24
申请号：US11588013
申请日：2006-10-24
CPC分类号： G11B5/3932 , B82Y10/00 , B82Y25/00 , G11B5/3163 , G11B2005/3996
摘要： A magnetoresistive sensor having a shape enhanced pinning and a flux guide structure. The sensor includes a sensor stack with a pinned layer, spacer layer and pinned layer. First and second hard bias layers and lead layers extend from the sides of the sensor stack. The hard bias layers and leads have a stripe height that is smaller than the stripe height of the free layer, resulting in a free layer that extends beyond the back edge of the lead and hard bias layer. This portion of the free layer that extends beyond the back edge of the leads and hard bias layers provides a back flux guide. Similarly, the sensor may have a free layer that extends beyond the front edge of the lead and hard bias layers to provide a front flux guide. The pinned layer extends significantly beyond the back edge of the free layer, providing the pinned layer with a strong shape enhanced magnetic anisotropy. The sensor may have a lead over layer structure, with the sensor layers extending significantly beyond the inner ends of the leads, thereby moving the outer edges of the sensor layers outside of the track width of the sensor. This eliminates the effect of magnetic damage at the outer edges of the free layer.
摘要翻译： 具有形状增强的钉扎和磁通引导结构的磁阻传感器。 传感器包括具有被钉扎层，间隔层和钉扎层的传感器堆叠。 第一和第二硬偏压层和引线层从传感器堆叠的侧面延伸。 硬偏置层和引线具有小于自由层的条纹高度的条纹高度，导致延伸超过引线和硬偏置层的后边缘的自由层。 自由层的延伸超过引线和硬偏置层的后边缘的部分提供了反向通量引导件。 类似地，传感器可以具有延伸超过引线和硬偏置层的前边缘的自由层，以提供前通量引导件。 被钉扎层明显地延伸超过自由层的后边缘，为钉扎层提供强的形状增强的磁各向异性。 传感器可以具有超导层结构，其中传感器层明显地超过引线的内端，从而将传感器层的外边缘移动到传感器的轨道宽度之外。 这消除了在自由层的外边缘处的磁损伤的影响。
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公开(公告)号：US06631055B2
公开(公告)日：2003-10-07
申请号：US09877358
申请日：2001-06-08
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/3909 , G11B5/3916 , G11B2005/3996 , Y10T29/49044
摘要： A flux guided magnetic tunnel junction head includes a ferromagnetic pinned layer having an active region with a front edge recessed from a sensing surface, and a non-active region located between the sensing surface and the active region. The non-active region of the ferromagnetic pinned layer is rendered substantially non-conducting by chemically processing the ferromagnetic material of the ferromagnetic pinned layer in this region. The flux guided MTJ head also includes a ferromagnetic free layer having a front edge substantially coplanar with a sensing surface. The ferromagnetic free layer can function as a flux guide to direct magnetic flux from a recording medium to the tunnel junction. The location of the front edge of the ferromagnetic pinned layer prevents any shorting of the flux guided MTJ head occurring when the head is lapped at the sensing surface.
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26.发明授权Notched shield and pole structure with slanted wing for perpendicular recording 有权具有垂直记录的倾斜翼的缺口盾和杆结构公开(公告)号：US07764469B2
公开(公告)日：2010-07-27
申请号：US10976479
申请日：2004-10-29
申请人： Kuok San Ho , Yimin Hsu , Ching Hwa Tsang
发明人： Kuok San Ho , Yimin Hsu , Ching Hwa Tsang
IPC分类号： G11B5/33
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/398
摘要： A magnetic structure for use in a magnetic head for avoiding stray field writing. The magnetic structure can be for example a magnetic shield or could be a magnetic pole of a write head and is particularly advantageous for use in a perpendicular recording system, because such perpendicular recording systems are especially susceptible to stray field writing. The magnetic structure includes a forward protruding portion that extends toward the air bearing surface (ABS) of the head also includes first and second wing portions that extend laterally from the forward protruding portion. The wing portions each have a front edge that is recessed from the ABS. The wings are tapered so that the amount of recess of the front edge of the wings increases with lateral distance from the center of the magnetic structure.
摘要翻译： 用于磁头的磁结构，用于避免杂散场写入。 磁性结构可以是例如磁屏蔽或者可以是写入磁头的磁极，并且对于在垂直记录系统中使用是特别有利的，因为这样的垂直记录系统特别容易受到杂散磁场写入的影响。 磁性结构包括朝向头部的空气支承表面（ABS）延伸的向前突出部分还包括从前突出部分横向延伸的第一和第二翼部分。 翼部各自具有从ABS凹入的前边缘。 翅膀是锥形的，使得翼的前边缘的凹部的数量随着与磁性结构的中心的横向距离而增加。
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27.发明授权Current perpendicular to plane magnetoresistive sensor having a shape enhanced pinned layer and an in stack bias structure 失效电流垂直于具有形状增强的钉扎层和堆叠偏置结构的平面磁阻传感器公开(公告)号：US07522391B2
公开(公告)日：2009-04-21
申请号：US11304219
申请日：2005-12-14
IPC分类号： G11B5/39
CPC分类号： G11B5/398 , B82Y25/00 , G01R33/093 , G11B5/3932 , H01L43/08
摘要： A magnetoresistive sensor having an in stack bias structure and a pinned layer having shape enhanced anisotropy. The sensor may be a partial mill design wherein the track width of the sensor is defined by the width of the free layer and the pinned layers extend beyond the trackwidth of the sensor. The sensor has an active area defined by the stripe height of the free layer. The pinned layer extends beyond the stripe height defined by the free layer, thus providing the pinned layer with the shape enhanced anisotropy. The pinned layer structure can be pinned by exchange coupling with a layer of antiferromagnetic material (AFM) layer, with pinning robustness being improved by the shape enhanced anisotropy, or can be a self pinned structure which is pinned by a combination of magnetostriction, AP coupling and shape enhanced anisostropy.
摘要翻译： 具有堆叠偏压结构的磁阻传感器和具有形状增强的各向异性的钉扎层。 传感器可以是部分磨机设计，其中传感器的轨道宽度由自由层的宽度限定，并且被钉扎层延伸超过传感器的轨道宽度。 传感器具有由自由层的条纹高度限定的有效区域。 钉扎层延伸超过由自由层限定的条纹高度，从而为钉扎层提供形状增强的各向异性。 钉扎层结构可以通过与反铁磁性材料（AFM）层的交换耦合来固定，其钉扎鲁棒性通过形状增强的各向异性而改善，或者可以是通过磁致伸缩，AP耦合的组合固定的自固定结构 和形状增强的不确定度。
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公开(公告)号：US20080144229A1
公开(公告)日：2008-06-19
申请号：US11638974
申请日：2006-12-14
IPC分类号： G11B5/33
CPC分类号： G11B5/3929 , B82Y25/00 , G01R33/093 , G11B5/3912 , G11B5/398
摘要： An improved magnetic head for a hard disk drive including a lead overlaid read head in which the read width and read gap are reduced. The read width, which corresponds to the distance between the inner ends of the overlaid electrical leads, is reduced by the fabrication of a thin read width insulation member prior to the fabrication of the overlaid electrical leads. The read gap is reduced by fabricating the overlaid electrical leads from a magnetic, electrically conductive material such as NiFe, whereby the overlaid electrical leads also function as a magnetic shield. The read gap, which is the distance between the first and second magnetic shields is thus reduced as compared to the prior art by the thickness of the electrical leads and the thickness of the prior art second insulation layer formed between the electrical leads and the second magnetic shield.
摘要翻译： 一种用于硬盘驱动器的改进磁头，包括读出宽度和读取间隙减小的引线重叠读头。 通过在制造覆盖的电引线之前制造薄的读宽度绝缘部件，减小对应于重叠的电引线的内端之间的距离的读宽度。 通过从诸如NiFe的磁性导电材料制造覆盖的电引线来减小读取间隙，由此重叠的电引线也用作磁屏蔽。 因此，与现有技术相比，通过电引线的厚度和形成在电引线和第二磁屏蔽之间的现有技术的第二绝缘层的厚度相比，第一和第二磁屏蔽之间的距离减小了读取间隙 屏蔽。
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29.发明申请Perpendicular magnetic write head with shunt structure to prevent read sensor interference 有权垂直磁头，分流结构，防止读取传感器干扰公开(公告)号：US20080030897A1
公开(公告)日：2008-02-07
申请号：US11497202
申请日：2006-08-01
申请人： Hardayal Singh Gill , Kuok San Ho , Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
发明人： Hardayal Singh Gill , Kuok San Ho , Wen-Chien David Hsiao , Yimin Hsu , Edward Hin Pong Lee , Vladimir Nikitin
CPC分类号： G11B5/3123 , G11B5/1278 , G11B5/3967
摘要： A magnetic head structure for use in perpendicular magnetic recording. The magnetic head includes a magnetic write head having a return pole with a magnetic shunt structure extending from the back end opposite the ABS. The magnetic shunt structure prevents magnetic field from the write coil from reaching and affecting the read head. More specifically the shunt structure prevents magnetic field from the portion of the write coil beyond the back gap (as measured from the ABS) from magnetizing a magnetic shield of the read head. The shunt structure is also configured so as to avoid stray field writing. The size and shape of the shunt structure is therefore, limited to avoid attracting stray fields that might cause such stray field writing.
摘要翻译： 用于垂直磁记录的磁头结构。 磁头包括具有从与ABS相对的后端延伸的磁分路结构的返回极的磁写头。 磁分路结构防止来自写入线圈的磁场到达并影响读取头。 更具体地说，分流结构防止来自写入线圈的部分的磁场超过后隙（从ABS测量）来磁化读取磁头的磁屏蔽。 分流结构也被配置为避免杂散场写入。 因此，分流结构的尺寸和形状受到限制，以避免吸引可能导致这种杂散场写入的杂散场。
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公开(公告)号：US20070266550A1
公开(公告)日：2007-11-22
申请号：US11437585
申请日：2006-05-19
CPC分类号： G11B5/3932 , B82Y10/00 , B82Y25/00 , G11B5/3163 , G11B2005/3996 , Y10T29/49043 , Y10T29/49044 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052 , Y10T29/49156
摘要： A read head for a disk drive and a method of fabricating the read head with overlaid lead pads that contact the top surface of the sensor between the hardbias structures to define the electrically active region of the sensor are described. The invention deposits the GMR and lead layers before milling away the unwanted material. A photoresist mask with a hole defining the active area of the sensor is preferably patterned over a layer of DLC that is formed into a mask. A selected portion of the exposed lead material is then removed using the DLC as a mask defining the active region of the sensor. A photoresist mask pad is patterned to define the full sensor width. The excess sensor and lead material exposed around the mask is milled away. The layers for the hardbias structure are deposited.
摘要翻译： 描述了用于磁盘驱动器的读取头和制造具有覆盖的引线焊盘的读取头的方法，所述引导焊盘在硬质结构之间接触传感器的顶表面以限定传感器的电活性区域。 本发明在铣削不想要的材料之前沉积GMR和铅层。 具有限定传感器的有效区域的孔的光致抗蚀剂掩模优选地在形成为掩模的DLC层上图案化。 然后使用DLC作为限定传感器的有源区域的掩模来去除暴露的引线材料的选定部分。 图案化光致抗蚀剂掩模垫以限定完整的传感器宽度。 暴露在面罩周围的多余传感器和铅材料被磨掉。 硬质合金结构的层被沉积。
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