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    SETTING BIAS CURRENTS AND LIMITING CORROSION IN TMR SENSORS
    1.
    发明申请
    SETTING BIAS CURRENTS AND LIMITING CORROSION IN TMR SENSORS 有权

    公开(公告)号：US20210012806A1

    公开(公告)日：2021-01-14

    申请号：US16506880

    申请日：2019-07-09

    Applicant: International Business Machines Corporation

    Inventor： Icko E.T. Iben ,  Lee Curtis Randall ,  Wlodzimierz Stanley Czarnecki ,  Jason Liang ,  Ernest Stewart Gale ,  David Lee Swanson

    IPC: G11B20/18 ,  G11B5/39

    Abstract: A method includes determining whether a tunneling magnetoresistance (TMR) sensor is corroded using resistance, amplitude and signal to noise ratio (SNR) measurements of the sensor. A method to determine whether a TMR sensor is corroded includes determining an expected initial resistance value, RTMRoUse and measuring a resistance value, RTMR, of the sensor. The method includes calculating a ratio of the RTMR value and the expected initial resistance value, RTMRoUse and determining whether the ratio is in a predefined range for the TMR sensor. In response to determining that the ratio of the sensor is within the predefined range, the method includes outputting an indication that the TMR sensor is corroded. In response to determining that the ratio of the sensor is outside the predefined range, the method includes outputting an indication that the TMR sensor is not corroded.

    SYSTEMS AND METHODS FOR PROTECTING A SENSITIVE DEVICE FROM CORROSION
    2.
    发明申请
    SYSTEMS AND METHODS FOR PROTECTING A SENSITIVE DEVICE FROM CORROSION 有权
    用于保护敏感器件的腐蚀的系统和方法

    公开(公告)号：US20160232926A1

    公开(公告)日：2016-08-11

    申请号：US15130442

    申请日：2016-04-15

    Applicant: International Business Machines Corporation

    Inventor： Richard Lionel Bradshaw ,  Icko Eric Timothy Iben ,  Wayne Alan McKinley ,  Lee Curtis Randall

    IPC: G11B5/255 ,  G11B5/31 ,  G11B5/40

    CPC classification number: G11B5/255 ,  G11B5/00821 ,  G11B5/3106 ,  G11B5/3113 ,  G11B5/40 ,  G11B5/41 ,  G11B23/0071

    Abstract: A magnetic storage system according to one embodiment includes a magnetic head having a removable organic coating thereon in an amount sufficient for reducing exposure of the head to oxidation promoting materials. The system also includes an applicator in a drive in which the magnetic head resides, the applicator being configured to apply the organic coating directly to the magnetic head without contacting the magnetic head. At least one guide is configured to create a spacing between the magnetic head and the guide, wherein the spacing is sufficient to insert the applicator into the spacing.

    Abstract translation: 根据一个实施例的磁存储系统包括其上具有可移除的有机涂层的磁头，其量足以减少磁头暴露于氧化促进材料。 该系统还包括在磁头所在的驱动器中的施加器，所述施加器构造成将有机涂层直接施加到磁头而不接触磁头。 至少一个引导件构造成在磁头和引导件之间产生间隔，其中间隔足以将施加器插入间隔中。

    Setting bias currents and limiting corrosion in TMR sensors
    7.
    发明授权
    Setting bias currents and limiting corrosion in TMR sensors 有权

    公开(公告)号：US10964350B2

    公开(公告)日：2021-03-30

    申请号：US16506880

    申请日：2019-07-09

    Applicant: International Business Machines Corporation

    Inventor： Icko E. T. Iben ,  Lee Curtis Randall ,  Wlodzimierz Stanley Czarnecki ,  Jason Liang ,  Ernest Stewart Gale ,  David Lee Swanson

    IPC: G11B20/18 ,  G11B5/39

    Abstract: A method includes determining whether a tunneling magnetoresistance (TMR) sensor is corroded using resistance, amplitude and signal to noise ratio (SNR) measurements of the sensor. A method to determine whether a TMR sensor is corroded includes determining an expected initial resistance value, RTMRoUse and measuring a resistance value, RTMR, of the sensor. The method includes calculating a ratio of the RTMR value and the expected initial resistance value, RTMRoUse and determining whether the ratio is in a predefined range for the TMR sensor. In response to determining that the ratio of the sensor is within the predefined range, the method includes outputting an indication that the TMR sensor is corroded. In response to determining that the ratio of the sensor is outside the predefined range, the method includes outputting an indication that the TMR sensor is not corroded.

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