公开(公告)号：US06667616B1

公开(公告)日：2003-12-23

申请号：US09380457

申请日：1999-09-02

申请人： Alexander M. Shukh ,  Edward S. Murdock ,  Anthony M. Mack

发明人： Alexander M. Shukh ,  Edward S. Murdock ,  Anthony M. Mack

IPC分类号： G01R3302

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B2005/3996 ,  H01F10/3268 ,  H01F10/3295 ,  H01F41/325

摘要： A spin valve sensor comprising a ferromagnetic free layer, a ferromagnetic pinned layer, a layer of non-ferromagnetic material positioned between the free layer and the pinned layer, and an antitferromagnetic pinning layer positioned adjacent to the pinned layer such that the pinning layer is in direct contact with the pinned layer. The free layer comprises a multi-layer stack including a non-magnetic insulating spacer positioned between a first and a second ferromagnetic sublayer. The non-magnetic insulating spacer provides a specular electron scattering effect. The first and the second ferromagnetic sublayers each have passive end regions separated by a central active region. The spin valve sensor further includes bias means positioned between the first and the second ferromagnetic sublayers in the passive end regions.

摘要翻译： 一种自旋阀传感器，包括铁磁性自由层，铁磁性钉扎层，位于自由层和钉扎层之间的非铁磁材料层，以及邻近被钉扎层定位的抗铁磁钉扎层，使得钉扎层处于 与被钉扎层直接接触。 自由层包括多层堆叠，其包括位于第一和第二铁磁子层之间的非磁性绝缘隔离物。 非磁性绝缘间隔物提供镜面电子散射效应。 第一和第二铁磁子层各自具有由中心有源区分隔的被动端区域。 自旋阀传感器还包括位于被动端区域中的第一和第二铁磁子层之间的偏置装置。

公开(公告)号：US06621659B1

公开(公告)日：2003-09-16

申请号：US09664270

申请日：2000-09-18

申请人： Alexander M. Shukh ,  Edward S. Murdock

发明人： Alexander M. Shukh ,  Edward S. Murdock

IPC分类号： G11B5147

CPC分类号： G11B5/0245

摘要： A giant magnetoresistance recording head includes a writer having a top pole, a shared pole, a conductive coil and a write gap region. The top pole includes a first top pole piece and a second top pole piece. The second top pole piece is formed at least in part over the first top pole piece and is recessed from the air bearing surface. The first top pole piece is formed over a top flat surface of the shared pole and is separated from the shared pole by the write gap region. The shared pole has a recess on the top surface. The recess is placed under the top pole and filled with a non-magnetic material. The non-magnetic recess in the shared pole defines the throat height of the writer.

摘要翻译： 巨磁阻记录头包括具有顶极，共享极，导电线圈和写间隙区的写入器。 顶杆包括第一顶极片和第二顶极片。 第二顶极件至少部分地形成在第一顶极件上并且从空气轴承表面凹陷。 第一顶极件形成在共享极的顶部平坦表面上，并且通过写入间隙区域与共享极分离。 共享杆在顶面有一个凹槽。 将凹槽置于顶极下方并填充非磁性材料。 共享极柱中的非磁性凹槽定义了写入器的喉部高度。

公开(公告)号：US06477007B1

公开(公告)日：2002-11-05

申请号：US09649985

申请日：2000-08-29

申请人： Alexander M. Shukh ,  Edward S. Murdock ,  Steven A. Mastain ,  James K. Price

发明人： Alexander M. Shukh ,  Edward S. Murdock ,  Steven A. Mastain ,  James K. Price

IPC分类号： G11B5147

CPC分类号： G11B5/3146 ,  G11B5/3109 ,  G11B5/3116 ,  G11B5/313 ,  Y10S977/934

摘要： A magnetic recording head having an air bearing surface comprises a writer having a substantially planar single piece top pole, a shared pole and a conductive coil. The top pole and shared pole are separated by a write gap region. A magnetic stud is positioned adjacent the write gap region near the air bearing surface. The magnetic stud provides a uniform magnetic flux supply to the write gap region. The magnetic stud has a variable height along the air bearing surface. An inner surface of the magnetic stud substantially conforms to an outer surface of the conductive coil. The shared pole includes a recess, and at least a portion of the conductive coil is positioned in the recess. The recess in the shared pole is filled with an insulator that substantially surrounds the portion of the conductive coil positioned in the recess. A capping layer is formed on the portion of the conductive coil positioned in the recess. The shared pole includes a common top surface comprising a top surface of the magnetic stud, a top surface of the insulator and a top surface of the capping layer. The common top surface is made substantially planar by chemical-mechanical polishing.

摘要翻译： 具有空气轴承表面的磁记录头包括具有基本上平面的单片顶极，共享极和导电线圈的写入器。 顶极和共用极被写入间隙区分开。 磁性螺柱位于靠近空气轴承表面的写入间隙区域附近。 磁性螺柱为写入间隙区域提供均匀的磁通量。 磁性螺柱沿空气轴承表面具有可变的高度。 磁性螺柱的内表面基本上符合导电线圈的外表面。 共享极包括凹部，并且导电线圈的至少一部分定位在凹部中。 共享极中的凹部填充有基本上围绕定位在凹部中的导电线圈的部分的绝缘体。 在位于凹部中的导电线圈的部分上形成覆盖层。 共享极包括公共顶表面，其包括磁柱的顶表面，绝缘体的顶表面和覆盖层的顶表面。 公共顶表面通过化学机械抛光制成基本平坦的。

公开(公告)号：US06594122B1

公开(公告)日：2003-07-15

申请号：US09605080

申请日：2000-06-26

申请人： Alexander M. Shukh

发明人： Alexander M. Shukh

IPC分类号： G11B517

CPC分类号： G11B5/3903 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3967 ,  Y10S977/934

摘要： A magnetic recording head having an air bearing surface includes first and second top poles, a bottom pole, a write gap layer positioned between the first top pole and the bottom pole, a first conductive coil positioned between the second top pole and the write gap layer, and a second conductive coil positioned in a recess of the bottom pole. At least a portion of the second conductive coil is positioned near the air bearing surface under the first top pole. In addition, the recess of the bottom pole is defined by a magnetic sublayer, wherein an inner surface of the magnetic sublayer does not include sharp corners near the air bearing surface.

摘要翻译： 具有空气轴承表面的磁记录头包括第一和第二顶极，底极，位于第一顶极和底极之间的写间隙层，位于第二顶极和写间隙层之间的第一导电线圈 以及位于底极的凹部中的第二导电线圈。 第二导电线圈的至少一部分位于第一顶极下的空气支承表面附近。 此外，底极的凹部由磁性子层限定，其中磁性子层的内表面不包括靠近空气轴承表面的尖角。

公开(公告)号：US06972932B2

公开(公告)日：2005-12-06

申请号：US09949407

申请日：2001-09-06

申请人： Alexander M. Shukh ,  Johannes Van Ek

发明人： Alexander M. Shukh ,  Johannes Van Ek

IPC分类号： G11B5/17 ,  G11B5/31 ,  G11B5/127

CPC分类号： G11B5/3156 ,  G11B5/17 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/313

摘要： A write element for a magnetoresistive (“MR”) head or a giant magnetoresistive (GMR) head includes a yoke and a coil. The coil made of a microstrip transmission line. The coil is a single turn and is U-shaped. The yoke of the write element includes laminated bottom pole, and top pole which are made of thin layers of ferromagnetic material antiferromagnetically exchange coupled to each other through a very thin nonmagnetic metallic layer. The yoke is made of metallic superlattices exhibiting strong antiferromagnetic exchange coupling between ferromagnetic layers through thin nonmagnetic metallic layers. The coil and the yoke are intertwined to provide two or more flux interactions between them. The yoke has a symmetrical structure with three interconnect vias, thereby reducing the effective magnetic length of the yoke. The antiferromagnetically exchange-coupled yoke has a stable single domain structure that exhibits very high switching time and does not suffer from hysteresis losses.

摘要翻译： 用于磁阻（“MR”）磁头或巨磁阻（GMR）磁头的写元件包括磁轭和线圈。 线圈由微带传输线制成。 线圈是单圈，为U形。 写入元件的磁轭包括层叠的底极和顶极，其由铁磁材料的薄层制成，通过非常薄的非磁性金属层反铁磁交换而彼此耦合。 磁轭由金属超晶格形成，通过薄的非磁性金属层在铁磁层之间表现出强烈的反铁磁交换耦合。 线圈和轭相互缠绕以在它们之间提供两个或更多的通量相互作用。 轭具有具有三个互连通孔的对称结构，从而减小轭的有效磁长度。 反铁磁交换耦合磁轭具有稳定的单畴结构，其显示非常高的开关时间并且不会受到磁滞损耗的影响。

公开(公告)号：US06504675B1

公开(公告)日：2003-01-07

申请号：US09759706

申请日：2001-01-12

申请人： Alexander M. Shukh ,  Frank Edgar Stageberg ,  Edward Stephens Murdock ,  Sharat Batra

发明人： Alexander M. Shukh ,  Frank Edgar Stageberg ,  Edward Stephens Murdock ,  Sharat Batra

IPC分类号： G11B5187

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1871

摘要： A writer for perpendicular recording on bilayer media with suppressed skew angle effect on the width of the recorded track is disclosed. The writer has a wide and flat trailing edge and a narrow leading edge. In a preferred embodiment, the pole has a trapezoidal cross-section. To suppress the skew effect on the width of the recorded track, the slope angle of the pole sides may be greater than the maximum skew angle in a drive.

摘要翻译： 公开了一种用于在双层介质上垂直记录的写入器，其具有抑制的倾斜角对记录轨道的宽度的影响。 作家具有宽而平坦的后缘和狭窄的前缘。 在优选实施例中，极具有梯形横截面。 为了抑制对记录轨道的宽度的歪斜影响，极侧的倾斜角度可能大于驱动器中的最大倾斜角度。

公开(公告)号：US20120313688A1

公开(公告)日：2012-12-13

申请号：US13487241

申请日：2012-06-03

申请人： Alexander M. Shukh ,  Tom A. Agan

发明人： Alexander M. Shukh ,  Tom A. Agan

IPC分类号： H03K17/24

CPC分类号： H03K17/693

摘要： A nonvolatile multiplexer circuit comprising an electric circuitry for selecting an output signal from a plurality of input signals based on select signals, the electric circuitry comprises at least one input terminal, at least one select terminal, and at least one output terminal; a high voltage source and low voltage source electrically coupled to a first and second source terminal, respectively of the electrical circuitry; at least one nonvolatile memory element comprising two stable logic states and electrically coupled to the output terminal at its first end and to an intermediate voltage source at its second end, wherein a logic state of the nonvolatile memory element is controlled by a bidirectional electrical current running through the memory element, and wherein an electrical potential of the intermediate voltage source is lower than that of the high voltage source but higher than that of the low voltage source.

摘要翻译： 一种非易失性多路复用器电路，包括用于基于选择信号从多个输入信号中选择输出信号的电路，所述电路包括至少一个输入端，至少一个选择端和至少一个输出端; 分别电连接到所述电路的第一和第二源极端子的高电压源和低电压源; 至少一个非易失性存储元件，包括两个稳定的逻辑状态，并在其第一端电耦合到输出端，并在其第二端电耦合到中间电压源，其中非易失性存储元件的逻辑状态由双向电流运行 通过存储元件，并且其中中间电压源的电位低于高压源的电位，但高于低电压源的电位。

公开(公告)号：US07301727B2

公开(公告)日：2007-11-27

申请号：US10880808

申请日：2004-06-30

申请人： Alexander M. Shukh

发明人： Alexander M. Shukh

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/012 ,  G11B5/3143 ,  G11B5/3967 ,  G11B2005/0029

摘要： A transducer including a return pole having a return pole tip extending to an external surface of the transducer. The external surface of the return pole tip has an area that is larger than a cross-sectional area of the return pole taken parallel to the external surface but at a back gap region within the transducer a distance from the external surface.

摘要翻译： 换能器包括具有延伸到换能器的外表面的返回极尖的返回极。 返回极尖端的外表面的面积大于平行于外表面的返回极的横截面面积，但在换能器内的距离外表面一定距离处的后间隙区域。

公开(公告)号：US07554765B2

公开(公告)日：2009-06-30

申请号：US10459098

申请日：2003-06-11

申请人： Alexander M. Shukh ,  Nurul Amin

发明人： Alexander M. Shukh ,  Nurul Amin

IPC分类号： G11B5/147

CPC分类号： G11B5/1278 ,  G11B5/3113 ,  G11B5/3156 ,  G11B5/3967

摘要： A magnetic head for perpendicular recording having reduced side writing and erasing is disclosed. The writer portion of the magnetic head includes a main pole and a return pole. The main pole includes a multilayer main pole tip and a multilayer yoke. The layers of the main pole tip and the yoke are antiferromagnetically coupled to each other with a non-magnetic metal. Antiferromagnetic coupling between the layers of the main pole tip and the yoke dramatically reduces fringing flux emanated from the sides of the main pole intending to close through an upper portion of the return pole. A biasing antiferromagnetic layer is coupled to the upper portion of the return pole to bias the return pole parallel to the air bearing surface. This prevents or reduces the effect of domain wall formation in the return pole, which results in further reduction in side writing and erasing.

摘要翻译： 公开了一种用于垂直记录的磁头，其具有减小的侧面写入和擦除。 磁头的写入器部分包括主极和返回极。 主极包括多层主极尖和多层轭。 主极尖和轭的层用非磁性金属反铁磁耦合。 主极尖和磁轭的层之间的反铁磁耦合显着地减少了从主极的侧面发出的边缘通量，其旨在靠近返回极的上部。 偏置反铁磁层耦合到返回极的上部，以将返回极平行于空气轴承表面偏置。 这样可以防止或减少返回极中的畴壁形成的影响，从而进一步减少了侧面写入和擦除。

公开(公告)号：US06954340B2

公开(公告)日：2005-10-11

申请号：US10113988

申请日：2002-04-01

申请人： Alexander M. Shukh ,  Ned Tabat

发明人： Alexander M. Shukh ,  Ned Tabat

IPC分类号： G11B5/11 ,  G11B5/127 ,  G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  G11B5/23

CPC分类号： G11B5/3146 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/315

摘要： A magnetic head for perpendicular recording on double layer media with suppressed side writing and controlled write width is disclosed. The present invention reduces the problem of side writing and controls the write width of the writing element by providing a writing element with a trailing edge sized dimensionally larger than the leading edge, side shields, and specifically spaced writing gaps placed at various distances between the write element and the side shields, return poles, and the main pole.

摘要翻译： 公开了一种用于垂直记录在双层介质上的磁头，具有抑制的侧面写入和受控的写入宽度。 本发明通过提供具有尺寸尺寸大于前缘，侧面屏蔽以及放置在写入之间的各种距离处的特别间隔的写入间隙的写入元件，通过提供写入元件的写入宽度来减小写入元件的写入宽度，并且控制写入元件的写入宽度 元件和侧面屏蔽，返回极和主极。