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    Magnetic sensor having a physically hard insulation layer over a magnetic bias structure
    2.
    发明授权
    Magnetic sensor having a physically hard insulation layer over a magnetic bias structure 失效
    磁传感器在磁偏置结构上具有物理硬绝缘层

    公开(公告)号：US08213132B2

    公开(公告)日：2012-07-03

    申请号：US11938677

    申请日：2007-11-12

    申请人： David Eugene Heim ,  Kim Y. Lee ,  Tsann Lin ,  Jih-Shiuan Luo

    发明人： David Eugene Heim ,  Kim Y. Lee ,  Tsann Lin ,  Jih-Shiuan Luo

    IPC分类号： G11B5/39

    CPC分类号： B82Y10/00 ,  G11B5/3163 ,  Y10T29/49048 ,  Y10T403/58

    摘要： A narrow track-width magnetoresistive sensor by defining a trench formed between first and second hard bias layers and depositing the sensor into the trench. The sensor can include a sensor stack sandwiched between first and second electrically conductive lead layers. First and second electrically insulating side walls are formed at either side of the sensor stack. First and second hard bias layers extend from the sides of the sensor stack, being separated from the sensor stack by the first and second electrically insulating side walls. First and second physically hard insulation layers are provided over each of the hard bias layers.

    摘要翻译： 通过限定形成在第一和第二硬偏置层之间的沟槽并将传感器沉积到沟槽中的窄轨道宽度磁阻传感器。 传感器可以包括夹在第一和第二导电引线层之间的传感器堆叠。 第一和第二电绝缘侧壁形成在传感器堆叠的任一侧。 第一和第二硬偏压层从传感器堆叠的侧面延伸，通过第一和第二电绝缘侧壁与传感器堆叠分离。 第一和第二物理硬绝缘层设置在每个硬偏压层上。

    Magnetic sensor with extended free layer and overlaid leads
    4.
    发明授权
    Magnetic sensor with extended free layer and overlaid leads 有权
    具有扩展自由层和重叠导线的磁性传感器

    公开(公告)号：US07652855B2

    公开(公告)日：2010-01-26

    申请号：US11595186

    申请日：2006-11-09

    申请人： James Mac Freitag ,  David Eugene Heim ,  Kuok San Ho ,  Wipul Pemsiri Jayasekara ,  Kim Y. Lee ,  Tsann Lin ,  Jyh-Shuey Lo ,  Mustafa Michael Pinarbasi ,  Ching Hwa Tsang

    发明人： James Mac Freitag ,  David Eugene Heim ,  Kuok San Ho ,  Wipul Pemsiri Jayasekara ,  Kim Y. Lee ,  Tsann Lin ,  Jyh-Shuey Lo ,  Mustafa Michael Pinarbasi ,  Ching Hwa Tsang

    IPC分类号： G11B5/39

    CPC分类号： G11B5/3932 ,  B82Y10/00 ,  B82Y25/00 ,  G11B2005/3996

    摘要： A lead overlay design of a magnetic sensor is described with sensor and free layer dimensions such that the free layer is stabilized by the large demagnetization field due to the shape anisotropy. In one embodiment the giant magnetoresistive (GMR) effect under the leads is destroyed by removing the antiferromagnetic (AFM) and pinned layers above the free layer. The overlaid lead pads are deposited on the exposed spacer layer at the sides of the mask that defines the active region. In other embodiment a layer of electrically insulating material is deposited over the sensor to encapsulate it and thereby insulate it from contact with the hardbias structures. Various embodiments with self-aligned leads are also described. In a variation of the encapsulation embodiment, the insulating material is also deposited under the lead pads so the electrical current is channeled through the active region of the sensor and sidewall deposited lead pads.

    摘要翻译： 用传感器和自由层尺寸描述磁传感器的引线覆盖设计，使得由于形状各向异性，自由层由大的退磁场稳定。 在一个实施例中，引线下的巨磁阻（GMR）效应通过去除自由层上方的反铁磁（AFM）和固定层而被破坏。 覆盖的引线焊盘沉积在限定有源区的掩模侧面上的暴露间隔层上。 在另一个实施例中，电绝缘材料层沉积在传感器上以将其封装并由此使其与硬质合金结构的接触绝缘。 还描述了具有自对准引线的各种实施例。 在封装实施例的变型中，绝缘材料也沉积在引线焊盘下方，使得电流通过传感器的有源区域和侧壁沉积的引线焊盘。

    Magnetic recording head with overlaid leads
    5.
    发明申请
    Magnetic recording head with overlaid leads 有权
    带重叠导线的磁记录头

    公开(公告)号：US20080112090A1

    公开(公告)日：2008-05-15

    申请号：US11595186

    申请日：2006-11-09

    申请人： James Mac Freitag ,  David Eugene Heim ,  Kuok San Ho ,  Wipul Pemsiri Jayasekara ,  Kim Y. Lee ,  Tsann Lin ,  Jyh-Shuey Lo ,  Mustafa Michael Pinarbasi ,  Ching Hwa Tsang

    发明人： James Mac Freitag ,  David Eugene Heim ,  Kuok San Ho ,  Wipul Pemsiri Jayasekara ,  Kim Y. Lee ,  Tsann Lin ,  Jyh-Shuey Lo ,  Mustafa Michael Pinarbasi ,  Ching Hwa Tsang

    IPC分类号： G11B5/33

    CPC分类号： G11B5/3932 ,  B82Y10/00 ,  B82Y25/00 ,  G11B2005/3996

    摘要： A lead overlay design of a magnetic sensor is described with sensor and free layer dimensions such that the free layer is stabilized by the large demagnetization field due to the shape anisotropy. In one embodiment the giant magnetoresistive (GMR) effect under the leads is destroyed by removing the antiferromagnetic (AFM) and pinned layers above the free layer. The overlaid lead pads are deposited on the exposed spacer layer at the sides of the mask that defines the active region. In other embodiment a layer of electrically insulating material is deposited over the sensor to encapsulate it and thereby insulate it from contact with the hardbias structures. Various embodiments with self-aligned leads are also described. In a variation of the encapsulation embodiment, the insulating material is also deposited under the lead pads so the electrical current is channeled through the active region of the sensor and sidewall deposited lead pads.

    摘要翻译： 用传感器和自由层尺寸描述磁传感器的引线覆盖设计，使得由于形状各向异性，自由层由大的退磁场稳定。 在一个实施例中，引线下的巨磁阻（GMR）效应通过去除自由层上方的反铁磁（AFM）和固定层而被破坏。 覆盖的引线焊盘沉积在限定有源区的掩模侧面上的暴露间隔层上。 在另一个实施例中，电绝缘材料层沉积在传感器上以将其封装并由此使其与硬质合金结构的接触绝缘。 还描述了具有自对准引线的各种实施例。 在封装实施例的变型中，绝缘材料也沉积在引线焊盘下方，使得电流通过传感器的有源区域和侧壁沉积的引线焊盘。

    Spin valve sensor having antiferromagnetic (AFM) pinning layer structures formed in the end regions
    6.
    发明授权
    Spin valve sensor having antiferromagnetic (AFM) pinning layer structures formed in the end regions 失效
    旋转阀传感器在端部区域形成反铁磁（AFM）钉扎层结构

    公开(公告)号：US07268981B2

    公开(公告)日：2007-09-11

    申请号：US10837168

    申请日：2004-04-30

    申请人： David Eugene Heim

    发明人： David Eugene Heim

    IPC分类号： G11B5/39 ,  G11B5/33

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3932 ,  G11B2005/3996

    摘要： In one illustrative example, a spin valve sensor includes a free layer structure; an anti-parallel (AP) pinned layer structure which includes at least a first AP pinned layer; and a non-magnetic electrically conductive spacer layer formed between the free layer structure and the AP pinned layer structure. First and second antiferromagnetic (AFM) pinning layer structures for magnetically pinning the first AP pinned layer are formed in end regions but are absent from its central region. Edges of each AFM pinning layer structure may be separated by a distance DA from the sensor edges. The first AP pinned layer is formed in both the central region and the end regions so as to be in contact with the first and second AFM pinning layer structures. Advantageously, adequate pinning properties are exhibited in a sensor which provides the benefits of a self-pinned sensor (e.g. a reduced sensor profile in the central region).

    摘要翻译： 在一个说明性示例中，自旋阀传感器包括自由层结构; 包括至少第一AP钉扎层的反并联（AP）钉扎层结构; 以及形成在自由层结构和AP钉扎层结构之间的非磁性导电间隔层。 用于磁性固定第一AP钉扎层的第一和第二反铁磁（AFM）钉扎层结构形成在端部区域中，但不存在于其中心区域。 每个AFM钉扎层结构的边缘可以与传感器边缘分开距离D A A A。 第一AP钉扎层形成在中心区域和端部区域中，以便与第一和第二AFM钉扎层结构接触。 有利的是，在传感器中表现出适当的钉扎性能，其提供自固定传感器（例如在中心区域中减小的传感器轮廓）的优点。

    Thin film induction recording head having an inset first insulation layer that defines zero throat height and pole tip apex angle
    7.
    发明授权
    Thin film induction recording head having an inset first insulation layer that defines zero throat height and pole tip apex angle 失效
    薄膜感应记录头具有插入的第一绝缘层，其限定零喉部高度和极尖顶角

    公开(公告)号：US5793578A

    公开(公告)日：1998-08-11

    申请号：US752012

    申请日：1996-11-15

    申请人： David Eugene Heim ,  Hugo Alberto Emilio Santini

    发明人： David Eugene Heim ,  Hugo Alberto Emilio Santini

    IPC分类号： G11B5/23 ,  G11B5/31 ,  G11B5/33 ,  G11B5/39 ,  G11B5/47

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/332 ,  G11B5/232

    摘要： The present invention uncouples the dependence between the zero throat height and the flare point of a write head by recessing the first insulation layer within the first pole piece layer. The first pole piece layer and the first insulation layer have planar surfaces which preferably lie in a common plane, the zero throat height being defined at the point where the planar surface of the first pole piece layer first meets the planar surface of the first insulation layer within the head. It is also at this point that the first and second pole piece layers separate from one another. Accordingly, the zero throat height can be accurately placed relative to the stripe height of a magneto-resistive (MR) sensor. Further, when a photoresist layer is spun onto the partially completed head for the construction of the pole tip of the second pole piece light directed into the photoresist layer for photo-imaging the pole tip does not reflect into the photoresist layer adjacent the pole tip. Accordingly, there is substantially no reflective notching of the photoresist layer because of the flatness of the surfaces of the first pole piece layer and the first insulation layer thereby permitting construction of a well defined second pole tip.

    摘要翻译： 本发明通过在第一极片层内凹陷第一绝缘层来解耦零喉部高度与写入头的扩张点之间的依赖关系。 第一极片层和第一绝缘层具有优选位于公共平面中的平坦表面，零喉部高度限定在第一极片层的平坦表面首先接触第一绝缘层的平坦表面的点处 在头内。 在这一点上，第一和第二极片层彼此分离。 因此，可以相对于磁阻（MR）传感器的条带高度准确地放置零喉部高度。 此外，当光致抗蚀剂层被旋转到部分完成的头部上用于构造第二极靴的极尖的光引导到用于光成像的光致抗蚀剂层中时，极尖不会反射到邻近极尖的光致抗蚀剂层中。 因此，由于第一极片层和第一绝缘层的表面的平坦度，因此允许构造良好限定的第二极端，因此基本上不存在光致抗蚀剂层的反射性凹陷。

    Magnetic storage system with canted hardbias magnetoresistive head
    9.
    发明授权
    Magnetic storage system with canted hardbias magnetoresistive head 失效

    公开(公告)号：US5666246A

    公开(公告)日：1997-09-09

    申请号：US435008

    申请日：1995-05-04

    申请人： Hardayal Singh Gill ,  David Eugene Heim

    发明人： Hardayal Singh Gill ,  David Eugene Heim

    IPC分类号： G11B5/11 ,  G11B5/39 ,  G11B5/127

    CPC分类号： G11B5/3932 ,  G11B5/399

    摘要： A magnetic storage system in which a magnetoresistive (MR) transducer utilizes a high coercivity magnetic material to produce a bias field for achieving higher signal output with low currents for narrow track width applications. Strips of high coercivity magnetic material contiguously contact opposite track-overlying edges of an MR layer. Each strip has a horizontal component of magnetization times its thickness that is at least equal to a horizontal component of magnetization of the MR layer times its thickness before the MR layer is biased by the strips, and each strip has its magnetization direction canted at an angle .phi. from its horizontal component. The MR layer is asymmetrically positioned between spaced magnetic shields and the MR layer is separated by a conductive nonmagnetic spacer layer from a shunt layer. Alternatively, the shunt layer is replaced by a reduced thickness soft film layer and the MR layer is centered between the shields and the strips also contiguously contact track overlying edges of the soft film layer.

    Contoured pole tip structures for minimizing side track erasure
    10.
    发明授权
    Contoured pole tip structures for minimizing side track erasure 失效
    用于最小化侧轨道擦除的轮廓极端结构

    公开(公告)号：US6122144A

    公开(公告)日：2000-09-19

    申请号：US995890

    申请日：1997-12-22

    申请人： Thomas Young Chang ,  David Eugene Heim ,  Edward Hinpong Lee

    发明人： Thomas Young Chang ,  David Eugene Heim ,  Edward Hinpong Lee

    IPC分类号： G11B5/012 ,  G11B5/31 ,  G11B5/39 ,  G11B5/187

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/012 ,  G11B5/312

    摘要： A write head is provided that has an "I" shaped pole tip structure. Flux leakage between bottom corners of a top horizontal component to a bottom horizontal component of the "I" shaped pole tip structure is obviated by rounding or tapering the side edges of the top horizontal component as it recesses into the head from the ABS. The angle taken by each recessed side edge with respect to the ABS edge is less than 90.degree. so that flux concentrations at the corners are minimized and flux leakage from these corners to the bottom horizontal component is substantially eliminated. In another embodiment of the invention the top horizontal component is configured with a necked down portion between front and rear portions for minimizing flux saturation of other pole tip components.

    摘要翻译： 提供具有“I”形极尖结构的写头。 顶部水平部件的底角与“I”形极端部结构的底部水平部件之间的通量泄漏通过使顶部水平部件的侧边缘从ABS凹入到头部中而使其侧边缘变圆或变细来消除。 每个凹入的侧边缘相对于ABS边缘所采取的角度小于90°，​​使得拐角处的通量浓度最小化，并且基本上消除了从这些拐角到底部水平分量的磁通泄漏。 在本发明的另一个实施例中，顶部水平部件配置有在前部和后部之间的颈缩部分，用于最小化其它极尖部件的通量饱和度。