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51.发明授权Magnetoresistive sensor having an enhanced lead overlay design and shape enhanced pinning 失效具有增强的引线覆盖设计和形状的磁阻传感器增强了钉扎公开(公告)号：US07663846B2
公开(公告)日：2010-02-16
申请号：US11297151
申请日：2005-12-07
IPC分类号： G11B5/33
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3163 , G11B5/3906 , G11B5/398
摘要： A magnetoresistive sensor having a lead overlay defined trackwidth and a pinned layer that extends beyond the stripe height defined by the free layer of the sensor. The extended pinned layer has a strong shape induced anisotropy that maintains pinning of the pinned layer moment. The extended portion of the pinned layer has sides beyond the stripe height that are perfectly aligned with the sides of the sensor within the stripe height. This perfect alignment is made possible by a manufacturing method that uses a mask structure for more than one manufacturing phase, eliminating the need for multiple mask alignments. The lead overlay design allows narrow, accurate trackwidth definition.
摘要翻译： 磁阻传感器具有引线覆盖层限定的轨道宽度和延伸超过由传感器的自由层限定的条带高度的钉扎层。 延伸的钉扎层具有强烈的形状诱导的各向异性，保持钉扎层力矩的钉扎。 被钉扎层的延伸部分具有超过条带高度的侧面，其在条纹高度内完全与传感器的侧面对准。 通过使用掩模结构用于多于一个制造阶段的制造方法，可以实现这种完美的对准，从而消除了对多个掩模对准的需要。 引线覆盖设计允许窄的，准确的轨道宽度定义。
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公开(公告)号：US07500303B2
公开(公告)日：2009-03-10
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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53.发明授权公开(公告)号：US07463459B2
公开(公告)日：2008-12-09
申请号：US10781548
申请日：2004-02-18
IPC分类号： G11B5/39
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3912
摘要： A self pinned magnetoresistive sensor that has a relatively thick compressive material at either side to assist with self pinning. A shield having recessed portions at either side of the sensor area allows room for a thicker compressive layer than would otherwise be possible.
摘要翻译： 自固定磁阻传感器，在任一侧具有相对较厚的压缩材料以辅助自锁。 在传感器区域的任一侧具有凹入部分的屏蔽件允许比否则可能的空间更厚的压缩层。
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公开(公告)号：US07414816B2
公开(公告)日：2008-08-19
申请号：US10857776
申请日：2004-05-28
摘要： A magnetic head (slider) which requires no lapping is described. The head is fabricated with an air bearing surface that is parallel to the wafer surface. The saw cuts used to separate the individual sliders from the rest of the wafer are perpendicular to the air-bearing surface and do not pass through any critical features. The read and write components are formed from thin films disposed parallel to the air bearing surface and can be side-by-side or tandem in relation to the recording track. The stripe height of the read sensor is controlled by the deposition process rather than by lapping. Various embodiments of the read head include contiguous junction biasing, external hard magnet biasing, and in-stack biasing. In one embodiment a permeable field collector is included below the sensor layer structure. An aperture shield surrounding the sensor at the ABS is included in one embodiment.
摘要翻译： 描述不需要研磨的磁头（滑块）。 该头部具有平行于晶片表面的空气轴承表面。 用于将各个滑块与其余的晶片分开的锯切板垂直于空气轴承表面，并且不通过任何关键特征。 读取和写入部件由平行于空气支承表面设置的薄膜形成，并且可以相对于记录轨道并排或串联。 读取传感器的条纹高度由沉积过程而不是研磨来控制。 读头的各种实施例包括连续的结偏置，外部硬磁体偏压和叠层偏置。 在一个实施例中，传感器层结构下面包括可渗透场收集器。 在ABS的一个实施例中包括围绕传感器的孔罩。
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55.发明申请Lead overlay based CPP magnetoresistive sensor with exchange biased free layer 有权具有交换偏置自由层的基于覆盖层的CPP磁阻传感器公开(公告)号：US20080037183A1
公开(公告)日：2008-02-14
申请号：US11502955
申请日：2006-08-10
CPC分类号： H01L43/10 , B82Y25/00 , G01R33/093 , G11B5/3906 , G11B5/398
摘要： A current perpendicular to plane (CPP) magnetoresistive sensor having a current path defined by first and second overlying insulation layers between which an electrically conductive lead makes content with a surface of the sensor stack. The current path being narrower than the width of the sensor stack allows the outer edges of the sensor stack to be moved outside of the active area of the sensor. This results in a sensor that is unaffected by damage at outer edges of the sensor layers. The sensor stack includes a free layer that is biased by direct exchange coupling with a layer of antiferromagnetic material (AFM layer). The strength of the exchange field can be controlled by adding Cr to the AFM material to ensure that the exchange field is sufficiently weak to avoid pinning the free layer.
摘要翻译： 一种垂直于平面（CPP）磁阻传感器的电流，其具有由第一和第二上覆绝缘层限定的电流路径，导电引线与传感器堆叠的表面成为内容。 当前路径比传感器堆叠的宽度窄，允许传感器堆叠的外边缘移动到传感器的有效区域之外。 这导致传感器不受传感器层外边缘损坏的影响。 传感器堆叠包括通过与反铁磁材料层（AFM层）的直接交换耦合而偏置的自由层。 可以通过向AFM材料添加Cr来控制交换场的强度，以确保交换场足够弱以避免固定自由层。
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56.发明授权Read sensor having an in-stack biasing structure and an AP coupled free layer structure for increased magnetic stability 失效具有堆叠偏压结构的读取传感器和用于提高磁稳定性的AP耦合自由层结构公开(公告)号：US07324313B2
公开(公告)日：2008-01-29
申请号：US10955681
申请日：2004-09-30
IPC分类号： G11B5/127
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/313 , G11B5/3903 , G11B5/3909 , G11B5/3932
摘要： Current-perpendicular-to-the-plane (CPP), current-in-to-the-plane (CIP), and tunnel valve type sensors are provided having an antiparallel (AP) coupled free layer structure, an in-stack biasing structure which stabilizes the AP coupled free layer structure and a nonmagnetic spacer layer formed between the in-stack biasing layer and the AP coupled free layer structure. The AP coupled free layer structure has a first AP coupled free layer adjacent to the nonmagnetic spacer layer, a second AP coupled free layer, and an antiparallel coupling (APC) layer formed between the first and the second AP coupled free layers. The net moment of the AP coupled free layer structure has an antiparallel edge magnetostatic coupling with the in-stack biasing structure. At the same time, the first AP coupled free layer has an antiparallel exchange coupling with the second AP coupled free layer. By forming the second AP coupled free layer with a thickness greater than a thickness of the first AP coupled free layer, the AP coupled free layer structure has a net magnetic moment in the direction of the second AP coupled free layer moment. The non-magnetic spacer layer is chosen so that first AP coupled free layer has a parallel interlayer (Neel or Orange-peel or positive exchange) coupling with the in-stack biasing structure, so that the interlayer coupling adds to the edge magnetostatic coupling to increase a stability of the AP coupled free layer structure.
摘要翻译： 提供了电流垂直于平面（CPP），电流平面（CIP）和隧道阀式传感器，其具有反平行（AP）耦合自由层结构，堆叠偏置结构 其稳定AP耦合的自由层结构和形成在堆叠间偏压层和AP耦合自由层结构之间的非磁性间隔层。 AP耦合自由层结构具有邻近非磁性间隔层的第一AP耦合自由层，第二AP耦合自由层以及形成在第一和第二AP耦合自由层之间的反并联耦合（APC）层。 AP耦合自由层结构的净矩具有与堆叠偏压结构的反平行边缘静磁耦合。 同时，第一AP耦合自由层与第二AP耦合自由层具有反平行交换耦合。 通过形成厚度大于第一AP耦合自由层的厚度的第二AP耦合自由层，AP耦合自由层结构在第二AP耦合自由层时刻的方向上具有净磁矩。 选择非磁性间隔层，使得第一AP耦合自由层具有与堆叠偏压结构耦合的平行中间层（Neel或橙色剥离或正交换），使得层间耦合增加了边缘静磁耦合 增加AP耦合自由层结构的稳定性。
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公开(公告)号：US07161763B2
公开(公告)日：2007-01-09
申请号：US10782088
申请日：2004-02-18
IPC分类号： G11B17/02
CPC分类号： G11B5/3903
摘要： Magnetic data storage devices use read/write heads to transfer data between the magnetic storage medium and the rest of the system. The read head is constructed with a magnetic layer called a free layer whose magnetic axis rotates based upon external magnetic influences of the magnetic storage medium. The free layer is biased into a predetermined magnetic orientation with the magnetic influence of a layer called a hard bias layer. Orientation of magnetic axes within the hard bias layer is desired. This document describes a hard bias layer whose magnetization exhibits uniaxial magnetic anisotropy.
摘要翻译： 磁数据存储设备使用读/写头在磁存储介质和系统的其余部分之间传送数据。 读头由具有磁性层的磁性层构成，磁性层基于磁存储介质的外部磁影响而旋转。 自由层被称为硬偏压层的层的磁影响而被偏压成预定的磁性取向。 期望硬偏置层内的磁轴的取向。 该文献描述了一种硬偏磁层，其磁化表现出单轴磁各向异性。
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58.发明授权Flux guide read head with in stack biased current perpendicular to the planes (CPP) sensor 失效磁通导向读头与堆叠偏置电流垂直于平面（CPP）传感器公开(公告)号：US06757144B2
公开(公告)日：2004-06-29
申请号：US10054530
申请日：2002-01-18
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/3932 , G11B2005/3996 , Y10T29/49044
摘要： Various embodiments of a read head employ a bias stack which is in a sensor stack of the read head. The bias stack includes a biasing layer and is separated from a free layer in the sensor by a spacer layer. A magnetic moment of the free layer is longitudinally biased antiparallel to a magnetic moment of the biasing layer because of the coupling therebetween. The free layer is therefore more uniformly longitudinally biased than when hard bias layers are employed at first and second side surfaces of the sensor. Various methods are described for making the various read heads of the present invention.
摘要翻译： 读头的各种实施例使用位于读头的传感器堆叠中的偏置堆叠。 偏置堆叠包括偏置层，并且通过间隔层与传感器中的自由层分离。 由于它们之间的耦合，自由层的磁矩被纵向偏置反平行于偏置层的磁矩。 因此，与在传感器的第一和第二侧表面使用硬偏压层时相比，自由层的纵向偏移更均匀。 描述了用于制造本发明的各种读取头的各种方法。
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59.发明授权CPP magnetoresistive sensors with in-stack longitudinal biasing and overlapping magnetic shield 失效CPP磁阻传感器具有堆叠纵向偏置和重叠磁屏蔽公开(公告)号：US06680832B2
公开(公告)日：2004-01-20
申请号：US09853352
申请日：2001-05-11
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/112 , G11B5/313 , G11B5/3909 , G11B5/3912 , G11B5/398 , G11B2005/3996
摘要： A current-perpendicular-to-the-plane (CPP) magnetoresistive sensor or read head has a magnetic shield geometry that covers the side walls of the sensor structure to prevent side reading caused by magnetic flux entering from adjacent data tracks. The shield geometry includes a bottom shield with a substantially planar surface and a specially shaped top shield. The top shield has substantially vertical portions generally parallel to the side walls of the sensor structure, a horizontal top portion over the trackwidth region of the sensor, and horizontal side portions formed over the portions of the bottom shield on either side of the sensor structure. The insulating gap material that separates the bottom and top shields is in contact with the horizontal portions of the bottom shield and the side walls of the sensor structure.
摘要翻译： 电流垂直平面（CPP）磁阻传感器或读头具有覆盖传感器结构的侧壁的磁屏蔽几何形状，以防止由相邻数据轨道进入的磁通量引起的侧读。 屏蔽几何形状包括具有基本平坦表面的底部屏蔽和特别形状的顶部屏蔽。 顶部屏蔽件具有大致平行于传感器结构的侧壁的大致垂直部分，在传感器的轨道宽度区域上方的水平顶部部分，以及形成在传感器结构的任一侧上的底部屏蔽部分之上的水平侧部分。 分离底部和顶部屏蔽件的绝缘间隙材料与底部屏蔽件的水平部分和传感器结构的侧壁接触。
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