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    Magnetic head having a hall effect sensor and circuit for detecting recorded bits from magnetic recording media
    1.
    发明授权
    Magnetic head having a hall effect sensor and circuit for detecting recorded bits from magnetic recording media 失效
    具有霍尔效应传感器的磁头和用于检测来自磁记录介质的记录位的电路

    公开(公告)号：US07440227B2

    公开(公告)日：2008-10-21

    申请号：US11069414

    申请日：2005-02-28

    Applicant: Amitava Chattopadhyay ,  Stefan Maat ,  Ernesto E. Marinero ,  Bruce Alvin Gurney

    Inventor： Amitava Chattopadhyay ,  Stefan Maat ,  Ernesto E. Marinero ,  Bruce Alvin Gurney

    IPC: G11B5/37

    CPC classification number: G11B5/376

    Abstract: A magnetic head has a sensor which employs the “Hall effect”. In one illustrative example, the sensor includes a generally planar body made of a semiconductor heterostructure; first and second contacts comprising first and second drains, respectively, which are formed over a first end of the body and spaced equally apart from a centerline of the body; and a third contact comprising a source formed over a second end of the body which is opposite the first end of the body. The semiconductor heterostructure is comprised of a high mobility two-dimensional electron or hole gas close to an air bearing surface (ABS) of the magnetic head so as to be exposed to magnetic field lines substantially normal to it from magnetically recorded bits. Advantageously, the sensor does not require magnetic materials utilized in conventional sensors and therefore does not suffer from magnetic noise associated therewith.

    Abstract translation: 磁头具有采用“霍尔效应”的传感器。 在一个说明性示例中，传感器包括由半导体异质结构制成的大体平面体; 第一和第二触头分别包括第一和第二漏极，它们分别形成在主体的第一端上并且与主体的中心线间隔开; 以及第三触点，其包括形成在所述主体的与所述主体的第一端相对的第二端上的源。 半导体异质结构包括靠近磁头的空气轴承表面（ABS）的高迁移率二维电子或空穴气体，以便从磁记录钻头暴露于基本垂直于其的磁场线。 有利地，传感器不需要在常规传感器中使用的磁性材料，因此不会与其相关的磁性噪声。

    Hall sensor with high spatial resolution in two directions concurrently
    2.
    发明授权
    Hall sensor with high spatial resolution in two directions concurrently 失效
    霍尔传感器同时具有两个方向的高空间分辨率

    公开(公告)号：US5543988A

    公开(公告)日：1996-08-06

    申请号：US479252

    申请日：1995-06-07

    Applicant: Michael J. Brady ,  Lia Krusin-Elbaum ,  William T. Masselink ,  Padmanabhan Santhanam ,  Tsuyoshi Tamegai

    Inventor： Michael J. Brady ,  Lia Krusin-Elbaum ,  William T. Masselink ,  Padmanabhan Santhanam ,  Tsuyoshi Tamegai

    IPC: G01R33/06 ,  G11B5/012 ,  G11B5/37 ,  H01L43/06 ,  H01L29/82

    CPC classification number: G11B5/376 ,  G01R33/06 ,  G11B5/012 ,  H01L43/065

    Abstract: A magnetic sensor, memory, and magnetic imager has been described for sensing a magnetic field in two directions concurrently incorporating a bar of semiconductor material having a rectangular cross-section, electrodes for introducing current along the length of the semiconductor material, and electrodes positioned on respective corners of the rectangular cross-section at a common distance along the current path whereby the Hall voltage may be detected concurrently in two directions. The memory includes the above magnetic sensor plus a disk having a magnetic layer thereon for storing information, a positioner for moving the disk, a memory control circuit and a signal processor circuit. The magnetic imager includes a plurality of magnetic field sensors positioned in a one or two-dimensional array. The invention overcomes the problem of mapping magnetic fields with high spatial resolution with high magnetic sensitivity in two directions concurrently.

    Abstract translation: 已经描述了一种磁传感器，存储器和磁性成像器，用于感测两个方向上的磁场，同时结合具有矩形横截面的半导体材料棒，用于沿半导体材料的长度引入电流的电极和位于 在沿着电流路径的公共距离处的矩形横截面的各个角部，由此可以在两个方向上同时检测霍尔电压。 存储器包括上述磁传感器加上用于存储信息的磁层上的磁盘，用于移动磁盘的定位器，存储器控制电路和信号处理器电路。 磁性成像器包括以一维或二维阵列定位的多个磁场传感器。 本发明克服了在两个方向同时映射具有高磁敏度的高空间分辨率磁场的问题。

    High resolution hall effect read head
    3.
    发明授权
    High resolution hall effect read head 失效
    高分辨率大厅效果读头

    公开(公告)号：US4371905A

    公开(公告)日：1983-02-01

    申请号：US206461

    申请日：1980-11-13

    Applicant: Erich P. Valstyn ,  G. Vinson Kelley

    Inventor： Erich P. Valstyn ,  G. Vinson Kelley

    IPC: G11B5/37 ,  G11B5/38

    CPC classification number: G11B5/376 ,  G11B5/378

    Abstract: A differential Hall effect magnetic read head exhibiting improved resolution. The head includes dual Hall elements in which the elements are oriented so that their major surface is perpendicular to the surface of the recording medium and biased so that they respond to the component of magnetic flux which is parallel to the surface of the recording medium. Operation in this manner enables information recorded at extremely high densities to be easily read. In an alternative embodiment, a single Hall element is utilized and direct and delayed outputs are differentially compared in order to detect flux transitions.

    Abstract translation: 差分霍尔效应磁读头表现出更好的分辨率。 头部包括双霍尔元件，其中元件被定向成使得它们的主表面垂直于记录介质的表面并被偏置，使得它们对平行于记录介质表面的磁通量的分量作出响应。 以这种方式的操作使得能够容易地读取以非常高的密度记录的信息。 在替代实施例中，使用单个霍尔元件，并且差分比较直接和延迟输出以便检测通量转换。

    Magnetic head having a hall effect sensor
    5.
    发明申请
    Magnetic head having a hall effect sensor 失效
    磁头具有霍尔效应传感器

    公开(公告)号：US20060193080A1

    公开(公告)日：2006-08-31

    申请号：US11069414

    申请日：2005-02-28

    Applicant: Amitava Chattopadhyay ,  Stefan Maat ,  Ernesto Marinero ,  Bruce Gurney

    Inventor： Amitava Chattopadhyay ,  Stefan Maat ,  Ernesto Marinero ,  Bruce Gurney

    IPC: G11B5/37

    CPC classification number: G11B5/376

    Abstract: A magnetic head has a sensor which employs the “Hall effect”. In one illustrative example, the sensor includes a generally planar body made of a semiconductor heterostructure; first and second contacts comprising first and second drains, respectively, which are formed over a first end of the body and spaced equally apart from a centerline of the body; and a third contact comprising a source formed over a second end of the body which is opposite the first end of the body. The semiconductor heterostructure is comprised of a high mobility two-dimensional electron or hole gas close to an air bearing surface (ABS) of the magnetic head so as to be exposed to magnetic field lines substantially normal to it from magnetically recorded bits. Advantageously, the sensor does not require magnetic materials utilized in conventional sensors and therefore does not suffer from magnetic noise associated therewith.

    Abstract translation: 磁头具有采用“霍尔效应”的传感器。 在一个说明性示例中，传感器包括由半导体异质结构制成的大体平面体; 第一和第二触头分别包括第一和第二漏极，它们分别形成在主体的第一端上并且与主体的中心线间隔开; 以及第三触点，其包括形成在所述主体的与所述主体的第一端相对的第二端上的源。 半导体异质结构包括靠近磁头的空气轴承表面（ABS）的高迁移率二维电子或空穴气体，以便暴露于与磁记录位基本垂直于其的磁场线。 有利地，传感器不需要在常规传感器中使用的磁性材料，因此不会与其相关的磁性噪声。

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