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    DETECTING DAMAGE TO MAGNETORESISTIVE SENSORS
    12.
    发明申请
    DETECTING DAMAGE TO MAGNETORESISTIVE SENSORS 审中-公开
    检测到磁传感器的损坏

    公开(公告)号：US20160118067A1

    公开(公告)日：2016-04-28

    申请号：US14989730

    申请日：2016-01-06

    Applicant: International Business Machines Corporation

    Inventor： Icko E. Tim Iben

    IPC: G11B5/455

    CPC classification number: G11B5/455 ,  G11B5/00826 ,  G11B5/3948

    Abstract: In one embodiment, a system is provided for detecting a damaged magnetoresistive sensor. The system includes a processor, and logic or software stored in hardware that is executable by the processor. The logic or software is configured to, when executed by the processor, determine a scaled resistance of a plurality of sensors. The scaled resistances are measured against at least a first bias current, Imr, or against a square of the at least a first bias current Imr, I2mr. The system also includes logic or software stored in hardware that is configured to, when executed by the processor, output a representation of the measurements.

    Abstract translation: 在一个实施例中，提供了一种用于检测损坏的磁阻传感器的系统。 该系统包括处理器，以及存储在可由处理器执行的硬件中的逻辑或软件。 逻辑或软件被配置为当由处理器执行时确定多个传感器的按比例的电阻。 按照至少第一偏置电流Imr或相对于至少第一偏置电流Imr，I2mr的平方来测量缩放电阻。 该系统还包括存储在硬件中的逻辑或软件，其被配置为当由处理器执行时输出测量的表示。

    MULTI-TRACK READER FOR IMPROVED SIGNAL TO NOISE RATIO
    13.
    发明申请
    MULTI-TRACK READER FOR IMPROVED SIGNAL TO NOISE RATIO 有权
    用于改善噪声信号的多轨读取器

    公开(公告)号：US20150248900A1

    公开(公告)日：2015-09-03

    申请号：US14194552

    申请日：2014-02-28

    Applicant: HGST Netherlands B.V.

    Inventor： Sharat Batra ,  Jonathan D. Coker ,  Travis R. Oenning

    IPC: G11B5/29 ,  G11B20/10

    CPC classification number: G11B5/29 ,  G11B5/012 ,  G11B5/09 ,  G11B5/33 ,  G11B5/39 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3951 ,  G11B5/3958 ,  G11B5/3977 ,  G11B20/10009 ,  G11B20/10305

    Abstract: A system according to one embodiment includes a magnetic head having a plurality of sensors arranged to simultaneously read at least three immediately adjacent data tracks on a magnetic medium, wherein none of the sensors share more than one lead with any other of the sensors. Such embodiment may be implemented in a magnetic data storage system such as a disk drive system, which may include a magnetic head, a drive mechanism for passing a magnetic medium (e.g., hard disk) over the magnetic head, and a controller electrically coupled to the magnetic head.

    Abstract translation: 根据一个实施例的系统包括具有多个传感器的磁头，所述多个传感器布置成在磁介质上同时读取至少三个紧邻的数据轨道，其中，所述传感器中的任一个与所述传感器中的任何其它传感器共享多于一个引线。 这样的实施例可以在诸如磁盘驱动器系统的磁数据存储系统中实现，磁盘驱动器系统可以包括磁头，用于使磁介质（例如，硬盘）通过磁头的驱动机构，以及控制器，电耦合到 磁头。

    Zig-zag MIMO head reducing space between three sensors
    14.
    发明授权
    Zig-zag MIMO head reducing space between three sensors 有权
    Zig-Zag MIMO头减少三个传感器之间的空间

    公开(公告)号：US09082436B1

    公开(公告)日：2015-07-14

    申请号：US14173758

    申请日：2014-02-05

    Applicant: HGST Netherlands B.V.

    Inventor： Hideki Mashima ,  Nobuo Yoshida ,  Iwata Norihiro ,  Tsutomu Yasuda

    IPC: G11B5/39

    CPC classification number: G11B5/3929 ,  G11B5/3163 ,  G11B5/3912 ,  G11B5/3948 ,  G11B5/3951 ,  G11B5/3954 ,  G11B5/3977 ,  G11B5/398

    Abstract: The embodiments disclosed generally relate to a magnetic recording head having three magnetoresistive effect elements. The structure comprises a first magnetoresistive effect element on a lower magnetic shield layer. Additionally, two lower electrodes are disposed on the two sides of the first magnetoresistive effect element. A second magnetoresistive effect element is disposed on a lower electrode while a third magnetoresistive effect element on another lower electrode. An upper magnetic shield layer is disposed between the second magnetoresistive effect element and the third magnetoresistive effect element. The upper magnetic shield also serves as an electrode of the first magnetoresistive effect element.

    Abstract translation: 所公开的实施例通常涉及具有三个磁阻效应元件的磁记录头。 该结构包括在下磁屏蔽层上的第一磁阻效应元件。 此外，两个下电极设置在第一磁阻效应元件的两侧。 第二磁阻效应元件设置在下电极上，而第三磁阻效应元件设置在另一下电极上。 上磁屏蔽层设置在第二磁阻效应元件和第三磁阻效应元件之间。 上磁屏蔽还用作第一磁阻效应元件的电极。

    Circuits, systems, and methods for calibration of bias across a magneto-resistive sensor
    17.
    发明授权
    Circuits, systems, and methods for calibration of bias across a magneto-resistive sensor 有权
    用于校准跨越磁阻传感器的偏置的电路，系统和方法

    公开(公告)号：US07751139B1

    公开(公告)日：2010-07-06

    申请号：US11893163

    申请日：2007-08-14

    Applicant: Thart Fah Voo

    Inventor： Thart Fah Voo

    IPC: G11B5/03

    CPC classification number: G11B5/02 ,  G11B5/3948

    Abstract: Circuits, systems, and methods for generating and calibrating bias for a magneto-resistive (MR) sensor. The circuit relates to a preamplifier circuit in a magnetic storage system, including an amplifier having an input coupled to a first MR sensor node, a first feedback path comprising a feedback resistor, the path configured to receive an amplifier output from the amplifier and to provide a feedback output to the first MR sensor node, a charging circuit configured to generate a current, apply the current to the first MR sensor node, and sample a voltage between the first MR sensor node and a second MR sensor node to produce a sampled voltage, the charging circuit operating when the feedback path is activated, and a bias circuit configured to apply a bias voltage across the first and second MR sensor nodes and to adjust the bias voltage to match the sampled voltage, the bias circuit operating when the feedback path is deactivated. The present invention advantageously provides for fast and accurate calibration of bias across an MR sensor that compensates for bias error introduced by the feedback path.

    Abstract translation: 用于产生和校准磁阻（MR）传感器偏置的电路，系统和方法。 该电路涉及磁存储系统中的前置放大器电路，包括具有耦合到第一MR传感器节点的输入的放大器，包括反馈电阻器的第一反馈路径，该路径被配置为接收来自放大器的放大器输出并提供 反馈输出到第一MR传感器节点，充电电路，被配置为产生电流，将电流施加到第一MR传感器节点，并且对第一MR传感器节点和第二MR传感器节点之间的电压进行采样以产生采样电压 所述充电电路在所述反馈路径被激活时工作;以及偏置电路，被配置为在所述第一和第二MR传感器节点上施加偏置电压，并且调整所述偏置电压以匹配所述采样电压，所述偏置电路在所述反馈路径 被禁用。 本发明有利地提供了对MR传感器的偏置的快速和精确的校准，其补偿由反馈路径引入的偏差误差。

    METHODS FOR DETECTING DAMAGE TO MAGNETORESISTIVE SENSORS
    18.
    发明申请
    METHODS FOR DETECTING DAMAGE TO MAGNETORESISTIVE SENSORS 失效
    检测磁传感器损坏的方法

    公开(公告)号：US20090268325A1

    公开(公告)日：2009-10-29

    申请号：US12111089

    申请日：2008-04-28

    Applicant: Icko E. Tim Iben ,  Darrell G. Follett ,  Guillermo Paniagua

    Inventor： Icko E. Tim Iben ,  Darrell G. Follett ,  Guillermo Paniagua

    IPC: G11B27/36

    CPC classification number: G11B27/36 ,  G11B5/3948 ,  G11B5/40 ,  G11B2220/90

    Abstract: In one embodiment, a method for detecting a damaged magnetoresistive sensor includes analyzing readback signals of a plurality of sensors each being positioned over data tracks on a passing magnetic medium; determining whether at least one of the readback signals is out of phase with respect to the other readback signals, and/or whether at least one of the readback signals has a significantly lower amplitude that the other readback signals. Additional methods are also presented.

    Abstract translation: 在一个实施例中，用于检测损坏的磁阻传感器的方法包括分析多个传感器的回读信号，每个传感器位于通过磁介质上的数据轨道上; 确定所述回读信号中的至少一个是否相对于其他回读信号是异相的，和/或所述回读信号中的至少一个是否具有显着较低的其他回读信号的幅度。 还介绍了其他方法。

    System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude
    19.
    发明授权
    System and method for determining head-disk contact in a magnetic recording disk drive by magnetoresistive signal amplitude 失效

    公开(公告)号：US07292401B2

    公开(公告)日：2007-11-06

    申请号：US11376660

    申请日：2006-03-14

    Applicant: Yong Shen ,  Jing Zhang

    Inventor： Yong Shen ,  Jing Zhang

    IPC: G11B15/18

    CPC classification number: G11B5/60 ,  G11B5/3948 ,  G11B5/6029

    Abstract: A system and method for determining head-disk contact (HDC) in a disk drive uses the signal from the magnetoresistive (MR) read head and does not require the presence of magnetic transitions on the disk. The method thus has application in head-disk testers or “spin stands” to facilitate the design and testing of slider-suspension assemblies and fly-height actuators, as well as in disk drives to take corrective action before HDC and/or to control fly-height actuators. The invention is also a magnetic recording disk drive that has a fly-height actuator and a low-pass filter and comparator circuit for the MR signal. When the output of the filter exceeds a threshold the comparator circuit output indicates the onset of HDC. The comparator circuit output is input to a digital processor or controller. When the controller determines the onset of HDC or that HDC has occurred, it generates a control signal that can be used to cause the disk drive to take corrective action.

    Method of fabrication for tape medium read head with unitary formation of multiple elements
    20.
    发明申请
    Method of fabrication for tape medium read head with unitary formation of multiple elements 失效
    用于带状介质读取头的制造方法，其具有多个元件的整体形成

    公开(公告)号：US20070017086A1

    公开(公告)日：2007-01-25

    申请号：US11186138

    申请日：2005-07-20

    Applicant: Ian McFadyen

    Inventor： Ian McFadyen

    IPC: G11B5/127 ,  H01R9/00

    CPC classification number: G11B5/3163 ,  G11B5/3173 ,  G11B5/3948 ,  Y10T29/49032 ,  Y10T29/49037 ,  Y10T29/49041 ,  Y10T29/49048 ,  Y10T29/49053 ,  Y10T29/49147 ,  Y10T29/49169

    Abstract: A method is presented for fabrication of a tape medium read head having a unitary formation of multiple elements for reading multi-track data from a magnetic tape. The method includes providing a continuous substrate layer, and forming a sensor material layer on the continuous substrate layer. Photoresist material is deposited on the sensor material layer, and is patterned to form masks which provide protected areas and exposed areas of the sensor material layer. Exposed areas of the sensor material layer are shaped to form sensors from the protected areas of the sensor material layer. Electrical lead materials are deposited between and adjacent to the sensors, and the masks are removed.

    Abstract translation: 提出了一种用于制造具有用于从磁带读取多轨迹数据的多个元件的整体形成的带式介质读取头的方法。 该方法包括提供连续的基底层，并在连续的基底层上形成传感器材料层。 光刻胶材料沉积在传感器材料层上，并被图案化以形成提供传感器材料层的保护区域和暴露区域的掩模。 传感器材料层的暴露区域成形为从传感器材料层的保护区域形成传感器。 电导线材料沉积在传感器之间并与传感器相邻，并且去除掩模。

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