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1.发明授权Current-in-plane magnetoresistive sensor with longitudinal biasing layer having a nonmagnetic oxide central region and method for fabrication of the sensor 失效具有具有非磁性氧化物中心区域的纵向偏置层的电流平面内磁阻传感器和用于制造传感器的方法公开(公告)号：US06778364B2
公开(公告)日：2004-08-17
申请号：US10230903
申请日：2002-08-28
IPC分类号： G11B539
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3116 , G11B5/3903 , G11B5/3932 , G11B2005/3996 , Y10T29/49044
摘要： A current-in-the-plane (CIP) giant magnetoresistive (GMR) spin valve sensor has its free layer magnetization stabilized by longitudinal biasing through the use of free layer end-region antiferromagnetic exchange coupling. An antiparallel coupling (APC) layer, such as Ru, is formed on the free layer and a ferromagnetic bias layer is formed on the APC layer. The bias layer is a continuous layer that extends across the entire width of the free layer. The central region of the bias layer is formed of nonmagnetic oxides of one or more of the elements making up the bias layer, with the bias layer end regions remaining ferromagnetic. The oxidized central region of the bias layer defines the central active trackwidth region of the underlying free layer. The ferromagnetic end regions of the bias layer are antiferromagnetically coupled across the APC layer to the corresponding underlying free layer end regions to provide the longitudinal biasing.
摘要翻译： 电流平面（CIP）巨磁阻（GMR）自旋阀传感器通过使用自由层末端反铁磁交换耦合的纵向偏置使其自由层磁化稳定。 在自由层上形成诸如Ru的反平行耦合（APC）层，并且在APC层上形成铁磁偏置层。 偏置层是在自由层的整个宽度上延伸的连续层。 偏置层的中心区域由构成偏置层的一个或多个元件的非磁性氧化物形成，偏置层端部区域保持铁磁性。 偏置层的氧化中心区域定义了下层自由层的中心主动轨道宽度区域。 偏置层的铁磁端区域跨越APC层反铁磁耦合到相应的下游自由层端部区域以提供纵向偏置。
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公开(公告)号：US06972935B2
公开(公告)日：2005-12-06
申请号：US10917982
申请日：2004-08-13
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/093 , G11B5/012 , G11B5/3116 , G11B5/3903 , G11B5/3932 , G11B2005/3996 , Y10T29/49044
摘要： A current-in-the-plane (CIP) giant magnetoresistive (GMR) spin valve sensor has its free layer magnetization stabilized by longitudinal biasing through the use of free layer end-region antiferromagnetic exchange coupling. An antiparallel coupling (APC) layer, such as Ru, is formed on the free layer and a ferromagnetic bias layer is formed on the APC layer. The bias layer is a continuous layer that extends across the entire width of the free layer. The central region of the bias layer is formed of nonmagnetic oxides of one or more of the elements making up the bias layer, with the bias layer end regions remaining ferromagnetic. The oxidized central region of the bias layer defines the central active track-width region of the underlying free layer. The ferromagnetic end regions of the bias layer are antiferromagnetically coupled across the APC layer to the corresponding underlying free layer end regions to provide the longitudinal biasing.
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3.发明授权公开(公告)号：US07558019B2
公开(公告)日：2009-07-07
申请号：US11560761
申请日：2006-11-16
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor where its blunt end is in contact with the pole tip is the “choke” point for the write pole, i.e., the point where the flux density is highest. The flux conductor enables the write pole to be made with no flare, or with a flare angle and throat height with a much wider tolerance, which substantially simplifies the manufacturing process. The write head may have a trailing shield and side shields that substantially surround the write pole tip and remove stray fields that may be produced by the flux conductor, so that regions of the recording layer other than the track being written are not adversely affected.
摘要翻译： 垂直磁记录写头具有与写极接触的磁通导体。 磁通导体在横向磁道方向上基本上比写入磁极尖端更宽，并且具有从磁极末端凹进的钝端。 其钝端与极尖接触的磁通导体的区域是写极的“扼流”点，即磁通密度最高的点。 磁通导体使写磁极能够制成没有耀斑，或具有更宽公差的喇叭角和喉部高度，这大大简化了制造过程。 写头可以具有基本上围绕写磁极尖端的后屏蔽和侧屏蔽，并且去除可能由磁通导体产生的杂散场，使得除了正在写入的磁道之外的记录层的区域不受不利影响。
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4.发明申请公开(公告)号：US20080117546A1
公开(公告)日：2008-05-22
申请号：US11560761
申请日：2006-11-16
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/11 , G11B5/3116 , G11B5/3146 , G11B5/315
摘要： A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor where its blunt end is in contact with the pole tip is the “choke” point for the write pole, i.e., the point where the flux density is highest. The flux conductor enables the write pole to be made with no flare, or with a flare angle and throat height with a much wider tolerance, which substantially simplifies the manufacturing process. The write head may have a trailing shield and side shields that substantially surround the write pole tip and remove stray fields that may be produced by the flux conductor, so that regions of the recording layer other than the track being written are not adversely affected.
摘要翻译： 垂直磁记录写头具有与写极接触的磁通导体。 磁通导体在横向磁道方向上基本上比写入磁极尖端更宽，并且具有从磁极末端凹进的钝端。 其钝端与极尖接触的磁通导体的区域是写极的“扼流”点，即磁通密度最高的点。 磁通导体使写磁极能够制成没有耀斑，或具有更宽公差的喇叭角和喉部高度，这大大简化了制造过程。 写头可以具有基本上围绕写磁极尖端的后屏蔽和侧屏蔽，并且去除可能由磁通导体产生的杂散场，使得除了正在写入的磁道之外的记录层的区域不受不利影响。
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5.发明授权Apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording 有权用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的装置公开(公告)号：US07978430B2
公开(公告)日：2011-07-12
申请号：US11852166
申请日：2007-09-07
申请人： Quang Le , James L. Nix , Aron Pentek , Walter E. Weresin , Mason L. Williams
发明人： Quang Le , James L. Nix , Aron Pentek , Walter E. Weresin , Mason L. Williams
CPC分类号： G11B5/1278 , Y10T29/49039 , Y10T29/49043 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording. A reverse air bearing surface head for perpendicular recording is provided with an inversed bevel shape to handle skew when recording data on a magnetic recording medium.
摘要翻译： 一种用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的方法和装置。 用于垂直记录的反向空气轴承表面头设置有反转的斜面形状，以在磁记录介质上记录数据时处理偏斜。
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6.发明授权Magnetoresistive sensor having a magnetically stable free layer with a positive magnetostriction 有权具有具有正磁致伸缩性的磁稳定自由层的磁阻传感器公开(公告)号：US07791844B2
公开(公告)日：2010-09-07
申请号：US11737701
申请日：2007-04-19
IPC分类号： G11B5/39
CPC分类号： G11B5/3166 , G11B5/3163 , G11B5/3196 , G11B5/3932 , G11C11/14 , H01L43/12
摘要： A magnetoresistive sensor having a magnetically stable free layer fabricated from a material having a positive magnetostriction such as a Co—Fe—B alloy. Although the free layer is fabricated from a material that has a positive magnetostriction, which would ordinarily make the free layer unstable, the magnetization of the free layer remains stable because of an induced magnetic anisotropy that has an easy axis of magnetization oriented parallel to the Air-bearing Surface (ABS). This magnetic anisotropy of the free layer is induced by an anisotropic texturing of the surface of the free layer. The resulting anisotropic surface texture is produced by an ion milling process that utilizes an ion beam directed at an acute angle relative to the normal to the surface of the wafer whereon the sensor is fabricated while the wafer is held on a stationary chuck. This angled, static ion milling produces an anisotropic surface texture, or roughness, of the free layer, which results in the above described magnetic anisotropy with an easy axis of magnetization in a desired orientation.
摘要翻译： 具有由具有正磁致伸缩性的材料制成的磁稳定自由层的磁阻传感器，例如Co-Fe-B合金。 尽管自由层由具有正磁致伸缩的材料制成，这通常会使自由层不稳定，但是由于具有易磁化轴平行于空气的诱导磁各向异性，自由层的磁化保持稳定 （ABS）。 自由层的磁各向异性由自由层表面的各向异性纹理引发。 产生的各向异性表面纹理是通过离子研磨工艺产生的，该离子铣削工艺利用相对于晶片表面法线的锐角定向的离子束，其中制造传感器，同时将晶片保持在静止卡盘上。 这种成角度的静态离子铣削产生自由层的各向异性表面纹理或粗糙度，这导致上述磁各向异性，并且在所需方向上具有容易的磁化轴。
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7.发明授权公开(公告)号：US07268985B2
公开(公告)日：2007-09-11
申请号：US10856710
申请日：2004-05-28
CPC分类号： G11B5/3932 , B82Y25/00 , G01R33/093
摘要： A magnetic head having an improved read head structure. The read head includes a free magnetic layer with hard bias elements disposed proximate its ends, where the hard bias elements include an improved hard bias magnetic grain structure. This is accomplished by fabricating the hard bias element as a bilayer structure having a first hard bias sublayer, a nonmagnetic midlayer and a second hard bias sublayer. The midlayer is preferably composed of a nonmagnetic material such as chromium, and the hard bias sublayers are composed of a magnetic material such as CoPtCr. Each sublayer is formed with its own magnetic grains, and because there are two sublayers, the hard bias element is fabricated with approximately twice the number of magnetic grains as the prior art single layer hard bias element.
摘要翻译： 具有改进的读头结构的磁头。 读头包括具有靠近其端部设置的硬偏置元件的自由磁性层，其中硬偏置元件包括改进的硬偏磁晶粒结构。 这是通过将硬偏压元件制造成具有第一硬偏压子层，非磁性中间层和第二硬偏压子层的双层结构来实现的。 中间层优选由诸如铬的非磁性材料构成，并且硬偏置子层由诸如CoPtCr的磁性材料构成。 每个子层由其自身的磁性颗粒形成，并且由于存在两个子层，所以用现有技术的单层硬偏置元件的大约两倍的磁性颗粒制造硬偏置元件。
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8.发明授权Method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording 失效用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的方法和装置公开(公告)号：US07296338B2
公开(公告)日：2007-11-20
申请号：US10903983
申请日：2004-07-30
CPC分类号： G11B5/1278 , Y10T29/49039 , Y10T29/49043 , Y10T29/49046 , Y10T29/49048 , Y10T29/49052
摘要： A method and apparatus for providing a reverse air bearing surface head with trailing shield design for perpendicular recording. A reverse air bearing surface head for perpendicular recording is provided with an inversed bevel shape to handle skew when recording data on a magnetic recording medium.
摘要翻译： 一种用于提供具有用于垂直记录的后挡板设计的反向空气轴承表面头的方法和装置。 用于垂直记录的反向空气轴承表面头设置有反转的斜面形状，以在磁记录介质上记录数据时处理偏斜。
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9.发明授权Magnetoresistive device and method having improved Barkhausen noise suppression 失效具有改进的巴克豪森噪声抑制的磁阻装置和方法
公开(公告)号：US5485334A
公开(公告)日：1996-01-16
申请号：US392393
申请日：1996-02-22
CPC分类号： G11B5/398 , G11B5/399 , H01L43/08 , H01L43/12 , G11B5/3116 , G11B5/3163 , G11B5/3903 , G11B5/3932 , Y10T29/49044 , Y10T29/49046
摘要： An improved magnetoresistive device and method for fabricating the same which results in improved Barkhausen noise suppression. A generally coplanar device is described having an MR structure conductive region longitudinally biased by opposing permanent magnet layers separated therefrom by a non-magnetic metal or dielectric separation layer. significant reduction of the demagnetization energy near the MR-to-permanent magnet junction is achieved, particularly in the use of an elliptically shaped conductive region and the resultant generally coplanar device is readily fabricated and reproducible using a self-aligning process. The longitudinal bias technique described can be used in conjunction with all known transverse bias techniques.
摘要翻译： 一种改进的磁阻器件及其制造方法，其导致改进的巴克豪森噪声抑制。 描述了一种大致共面的器件，其具有通过非磁性金属或介电分离层与其分开的相对的永久磁体层纵向偏置的MR结构导电区域。 实现了MR永磁体结附近的退磁能的显着降低，特别是在使用椭圆形导电区域时，使用自对准工艺容易地制造和重现所得到的大体上共面的器件。 所描述的纵向偏置技术可以与所有已知的横向偏压技术结合使用。
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10.发明授权
公开(公告)号：US5001586A
公开(公告)日：1991-03-19
申请号：US388241
申请日：1989-08-01
CPC分类号： B82Y25/00 , G01R33/093 , G11B5/3903 , G11B5/399 , H01L43/08
摘要： A soft film biased magnetoresistive sensor (10) is fabricated to have reduced Barkhausen noise. The magnetic ratio of the film layers (14 and 18) is controlled to be in the range of 1.7 to 1.95 and the optimum bias point is controlled to be in the range of 35 and 41 degrees.
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