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    Magnetic shields for reduced variations of head-media spacing
    22.
    发明授权
    Magnetic shields for reduced variations of head-media spacing 有权
    磁屏蔽，用于减小头部 - 介质间距的变化

    公开(公告)号：US07031122B2

    公开(公告)日：2006-04-18

    申请号：US10206739

    申请日：2002-07-26

    Applicant: Ladislav Rudolf Pust ,  Declan Macken ,  Mark Thomas Kief ,  Yifan Zhang ,  Venkateswara Inturi ,  Richard Paul Larson

    Inventor： Ladislav Rudolf Pust ,  Declan Macken ,  Mark Thomas Kief ,  Yifan Zhang ,  Venkateswara Inturi ,  Richard Paul Larson

    IPC: G11B5/39 ,  G11B5/255

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/10 ,  G11B5/105 ,  G11B5/112 ,  G11B5/3903 ,  G11B5/40 ,  G11B33/14 ,  G11B2005/3996

    Abstract: The invention offers a magnetic recording head that includes a substrate, a read sensor, and at least one shield positioned adjacent to the read sensor, wherein the shield contributes to thermal pole-tip recession in an amount less than about 0.5 Å/° C. The invention also offers a magnetic recording head that includes a substrate having a coefficient of thermal expansion, a read sensor, and at least one shield, positioned adjacent to the read sensor, that has a coefficient of thermal expansion within ±2×10−6/° C. of the coefficient of thermal expansion of the substrate. The invention further offers a magnetic recording head that includes a substrate, a read sensor, and at least one shield, positioned adjacent the read sensor, with a thickness of from about 0.05 μm to about 0.5 μm.

    Abstract translation: 本发明提供了一种磁记录头，其包括基板，读取传感器和邻近读取传感器定位的至少一个屏蔽件，其中该屏蔽件以小于约/℃/℃的量有助于热极尖端退缩。 本发明还提供了一种磁记录头，其包括具有热膨胀系数的基板，读取传感器和邻近读取传感器定位的至少一个屏蔽件，其具有在±2×10 -6以内的热膨胀系数， 6℃/℃的基板的热膨胀系数。 本发明还提供了一种磁记录头，其包括基片，读取传感器以及与读取传感器相邻定位的至少一个屏蔽件，厚度为约0.05μm至约0.5μm。

    Domain wall free shields of MR sensors
    23.
    发明申请
    Domain wall free shields of MR sensors 有权
    MR传感器的域壁免费屏蔽

    公开(公告)号：US20050128647A1

    公开(公告)日：2005-06-16

    申请号：US10733545

    申请日：2003-12-11

    Applicant: Declan Macken

    Inventor： Declan Macken

    IPC: G11B5/127 ,  G11B5/33 ,  G11B5/596 ,  G11B33/12

    CPC classification number: G11B33/121 ,  G11B5/59627

    Abstract: A magnetic reader of the present invention comprises an MR sensor shielded by a magnetic shield including single domain soft magnetic materials. The domain wall free magnetic shield includes an unbiased soft magnetic layer and a biased soft magnetic layer separated by a non-magnetic layer. The easy axis of the biased layer is oriented to create a path for magnetic flux through the biased and unbiased layers thereby reducing the demagnetization field of the shield. A biasing layer maintains the first and second magnetic layers as single domain magnets. The biasing layer is further shaped to define a quiet zone where the biasing layer does not overlay the MR sensor.

    Abstract translation: 本发明的磁读取器包括由包括单畴软磁材料的磁屏蔽屏蔽的MR传感器。 无畴壁磁屏蔽包括由非磁性层分离的无偏软磁层和偏置软磁层。 偏置层的容易轴被定向以产生通过偏置和无偏压层的磁通的路径，从而减少屏蔽的去磁场。 偏置层将第一和第二磁性层保持为单畴磁体。 偏置层进一步成形以限定偏置层不覆盖MR传感器的安静区域。

    Slider basecoat for thermal PTR reduction
    26.
    发明授权
    Slider basecoat for thermal PTR reduction 有权
    滑块底漆用于热PTR降低

    公开(公告)号：US06836389B2

    公开(公告)日：2004-12-28

    申请号：US10383298

    申请日：2003-03-07

    Applicant: Declan Macken ,  John Robert Pendray ,  Vee Sochivy Kong ,  Mallika Kamarajugadda ,  Jeremy Adam Thurn

    Inventor： Declan Macken ,  John Robert Pendray ,  Vee Sochivy Kong ,  Mallika Kamarajugadda ,  Jeremy Adam Thurn

    IPC: G11B560

    CPC classification number: G11B5/3136 ,  G11B5/10 ,  G11B5/105 ,  G11B5/3106 ,  G11B5/6005 ,  G11B5/6082

    Abstract: A magnetic head slider having an air bearing surface is used for reading and writing data from a magnetic medium. The magnetic head includes a substrate having a disc opposing face bounded by a leading face, a trailing face, and first and second sided edges. The slider includes an end layer positioned upon the trailing face of the substrate wherein the basecoat has a disc opposing face and is comprised of a material having a coefficient of thermal expansion greater than a coefficient of thermal expansion of the substrate. An air bearing pad is formed solely on the disc opposing face of the end layer. A transducing head is formed in the air bearing pad and exposed at an air bearing surface.

    Abstract translation: 具有空气轴承表面的磁头滑块用于从磁介质读取和写入数据。 磁头包括具有由前导面，后表面以及第一和第二边缘限定的盘对面的基板。 滑块包括位于基板的后表面上的端层，其中底涂层具有盘相对面，并且由具有大于基板的热膨胀系数的热膨胀系数的材料构成。 空气轴承瓦片仅形成在端层的盘相对面上。 换能头形成在空气轴承瓦片中并在空气轴承表面露出。

    Single domain state laminated thin film structure for use as a magnetic layer of a transducing head
    27.
    发明授权
    Single domain state laminated thin film structure for use as a magnetic layer of a transducing head 失效
    单畴状层叠薄膜结构，用作转换头的磁性层

    公开(公告)号：US06807031B2

    公开(公告)日：2004-10-19

    申请号：US10190182

    申请日：2002-07-03

    Applicant: Declan Macken ,  Gavin Brinkley ,  Taras Grigoryevich Pokhil ,  Alexandar Mikhailovich Shukh ,  Martin Louis Plumer

    Inventor： Declan Macken ,  Gavin Brinkley ,  Taras Grigoryevich Pokhil ,  Alexandar Mikhailovich Shukh ,  Martin Louis Plumer

    IPC: G11B539

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/3113 ,  G11B5/3903 ,  G11B2005/3996

    Abstract: A transducing head includes at least three magnetic layers. At least two of these magnetic layers function as shields of a reader portion of the transducing head, and at least one of these magnetic layers functions as a pole of a writer portion of the transducing head. Importantly, at least one of the three magnetic layers is formed of a thin film structure having a first and a second ferromagnetic layer, a nonmagnetic spacer layer, and a bias layer. The spacer layer is positioned between the first and the second ferromagnetic layers. The bias layer is positioned adjacent the first ferromagnetic layer. The second ferromagnetic layer has a thickness-magnetic moment product substantially equal to a thickness-magnetic moment product of the first ferromagnetic layer. An easy axis of the second ferromagnetic layer is substantially parallel to an easy axis of the first ferromagnetic layer.

    Abstract translation: 换能头包括至少三个磁性层。 这些磁性层中的至少两个用作换能头的读取器部分的屏蔽，并且这些磁性层中的至少一个用作换能头的写入器部分的极点。 重要的是，三个磁性层中的至少一个由具有第一和第二铁磁层，非磁性间隔层和偏置层的薄膜结构形成。 间隔层位于第一和第二铁磁层之间。 偏置层位于第一铁磁层附近。 第二铁磁层具有基本上等于第一铁磁层的厚度 - 磁矩乘积的厚度 - 磁矩积。 第二铁磁层的易轴基本上平行于第一铁磁层的容易轴。

    Resistance temperature sensors for head-media and asperity detection
    29.
    发明授权
    Resistance temperature sensors for head-media and asperity detection 有权
    电阻温度传感器用于头部介质和粗糙度检测

    公开(公告)号：US08737009B2

    公开(公告)日：2014-05-27

    申请号：US13299094

    申请日：2011-11-17

    Applicant: Gary J. Kunkel ,  Huazhou Lou ,  Declan Macken ,  Timothy W. Stoebe

    Inventor： Gary J. Kunkel ,  Huazhou Lou ,  Declan Macken ,  Timothy W. Stoebe

    IPC: G11B21/02

    CPC classification number: G11B5/607 ,  G01K13/00 ,  G11B5/024 ,  G11B5/3133 ,  G11B5/6011 ,  G11B5/6076 ,  G11B7/0948 ,  G11B7/121 ,  G11B20/10 ,  G11B27/36

    Abstract: A temperature sensor of a head transducer measures temperature near or at the close point. The measured temperature varies in response to changes in spacing between the head transducer and a magnetic recording medium. A detector is coupled to the temperature sensor and is configured to detect a change in a DC component of the measured temperature indicative of onset of contact between the head transducer and the medium. Another head transducer configuration includes a sensor having a sensing element with a high temperature coefficient of resistance to interact with asperities of the medium. Electrically conductive leads are connected to the sensing element and have a low temperature coefficient of resistance relative to that of the sensing element, such thermally induced resistance changes in the leads have a negligible effect on a response of the sensing element to contact with the asperities.

    Abstract translation: 头传感器的温度传感器测量靠近或接近的温度。 测量的温度响应于头部换能器和磁记录介质之间的间隔的变化而变化。 检测器耦合到温度传感器并且被配置为检测指示头部换能器和介质之间的接触开始的测量温度的DC分量的变化。 另一个头部传感器配置包括传感器，该传感器具有具有高温度系数的传感元件，以与介质的粗糙度相互作用。 导电引线连接到感测元件并且具有相对于感测元件的电阻的低温度系数，引线中的这种热感应电阻变化对感测元件与凹凸接触的响应具有可忽略的影响。

    Adjusting heater current to reduce read transducer asymmetry
    30.
    发明授权
    Adjusting heater current to reduce read transducer asymmetry 有权
    调节加热器电流以减少读取传感器的不对称性

    公开(公告)号：US08737005B1

    公开(公告)日：2014-05-27

    申请号：US12985952

    申请日：2011-01-06

    Applicant: Declan Macken ,  Scott W. Stokes ,  Jenny J. Wang

    Inventor： Declan Macken ,  Scott W. Stokes ,  Jenny J. Wang

    IPC: G11B5/03 ,  G11B27/36 ,  G11B21/02

    CPC classification number: G11B5/607 ,  G11B20/10027 ,  G11B2005/0016

    Abstract: An asymmetry is determined of a signal generated by a read transducer in proximity to a changing magnetic field of a magnetic media. In response to determining the asymmetry of the signal, a current flowing through a heater of the read transducer is adjusted to cause a change to a magnetic field generated by the current. The change to the magnetic field generated by the current reduces the asymmetry of the signal.

    Abstract translation: 确定由读取传感器在磁性介质的变化磁场附近产生的信号的不对称性。 响应于确定信号的不对称性，流过读取换能器的加热器的电流被调节以引起由电流产生的磁场的变化。 由电流产生的磁场的变化减小了信号的不对称性。

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