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32 条记录 (耗时 0.02 秒)

    Thin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reduction
    4.
    发明授权
    Thin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reduction 失效
    薄膜磁头，具有通过聚焦离子束蚀刻的修剪极尖，用于下冲

    公开(公告)号：US5726841A

    公开(公告)日：1998-03-10

    申请号：US661749

    申请日：1996-06-11

    申请人： Hua-Ching Tong ,  Francis H. Liu ,  Samuel W. Yuan ,  Vernon M. Riedlin, Jr. ,  Pradeep K. Thayamballi

    发明人： Hua-Ching Tong ,  Francis H. Liu ,  Samuel W. Yuan ,  Vernon M. Riedlin, Jr. ,  Pradeep K. Thayamballi

    IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/187

    CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/3163

    摘要： An air bearing magnetic head is formed with a trimmed head pole tip that includes first and second poles having first and second surfaces respectively, which are coplanar with the air bearing surface of the magnetic head. A pair of leading and trailing bevel surfaces are angularly formed with respect to the first and second surfaces respectively. The bevel surfaces retract portions of the head pole tip away from the surface of a storage medium, and render the head pole tip less sensitive to stray flux, resulting in readback data signals being practically free of undesirable signal undershoots and overshoots. In addition, a minute amount of pole material of the first and second surfaces are trimmed away, thereby defining stepped areas with narrow widths in the first and second poles. The stepped areas enable the magnetic head to record data with narrow and well defined track widths.

    摘要翻译： 一个空气轴承磁头形成有一个修剪的磁头极头，它包括分别具有与磁头的空气支承表面共面的第一和第二表面的第一和第二磁极。 一对前后斜面分别相对于第一表面和第二表面成角度地形成。 斜面使头磁极尖端的部分远离存储介质的表面，并使磁头极尖对杂散磁通较不敏感，导致回读数据信号实际上没有不期望的信号下冲和过冲。 此外，第一和第二表面的极材料的微小量被修剪掉，从而在第一和第二极中限定具有窄宽度的台阶区域。 台阶区域使得磁头能够以窄且良好的轨道宽度记录数据。

    Magnetoresistive transducer having a common magnetic bias using assertive and complementary signals
    5.
    发明授权
    Magnetoresistive transducer having a common magnetic bias using assertive and complementary signals 失效
    具有使用断言和互补信号的公共磁偏置的磁阻换能器

    公开(公告)号：US06392850B1

    公开(公告)日：2002-05-21

    申请号：US09651053

    申请日：1998-10-19

    申请人： Hua-Ching Tong ,  Francis H. Liu ,  Minshen Tan ,  Robert Earl Rottmayer ,  Jian-Gang Zhu ,  Samuel W. Yuan

    发明人： Hua-Ching Tong ,  Francis H. Liu ,  Minshen Tan ,  Robert Earl Rottmayer ,  Jian-Gang Zhu ,  Samuel W. Yuan

    IPC分类号： G11B539

    CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G01R33/096 ,  G11B5/3954 ,  G11B2005/3996

    摘要： Magnetic transducers are formed with common magnetic exchange layers capable of providing assertive and complementary signals. The transducers include an assertive transducer portion and a complementary transducer portion. Between the two transducer portions is a common bias portion which comprises an antiferromagnetic layer providing bias fields in different directions to the respective transducer portions. During normal operations, a current is directed into each of the transducer portions. The assertive transducer portion, being magnetically biased in one direction, generates a varying voltage as an assertive version of the electrical signal. The complementary transducer, being magnetically biased in another direction, generates another varying voltage as a complementary version of the electrical signal. In one embodiment, the transducer portions are implemented to operate as an anisotropic MR(AMR) sensor. In a second embodiment, the transducer portions operate as a giant MR(GMR) or spin valve sensor.

    摘要翻译： 磁传感器形成有能够提供断言和互补信号的公共磁交换层。 换能器包括断言换能器部分和互补换能器部分。 在两个换能器部分之间是公共偏置部分，其包括反铁磁层，其向相应的换能器部分提供不同方向的偏置场。 在正常操作期间，电流被引导到每个换能器部分中。 在一个方向上被磁偏置的断言换能器部分产生变化的电压作为电信号的断言版本。 互补传感器在另一个方向上被磁偏置，产生另一个变化的电压作为电信号的互补版本。 在一个实施例中，传感器部分被实现为用作各向异性MR（AMR）传感器。 在第二实施例中，换能器部分作为巨型MR（GMR）或自旋阀传感器工作。

    Low noise magnetic head for high frequency recording
    7.
    发明授权
    Low noise magnetic head for high frequency recording 失效
    低噪音磁头用于高频录音

    公开(公告)号：US5792547A

    公开(公告)日：1998-08-11

    申请号：US607130

    申请日：1996-02-26

    申请人： Francis H. Liu ,  Minshen Tan ,  Hua-Ching Tong

    发明人： Francis H. Liu ,  Minshen Tan ,  Hua-Ching Tong

    IPC分类号： G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  G11B5/127

    CPC分类号： B82Y25/00 ,  G11B5/3113 ,  G11B5/3903 ,  G11B5/3925 ,  H01F10/3218 ,  G11B5/3163 ,  Y10S428/90 ,  Y10T428/1186 ,  Y10T428/24942

    摘要： A laminated pole structure for use in a low noise magnetic head suitable for high frequency signal operation is formed by interleaving a plurality of ferromagnetic layers and electrically insulating antiferromagnetic layers so as to form interface surfaces therebetween. External magnetic fields are applied as the interface surfaces are being formed for establishing exchange anisotropies with predetermined permanent exchange pinning directions in the ferromagnetic layers. The exchange anisotropies may be in the same or opposite directions, as defined by the external magnetic fields. In one embodiment, the pole structure has an open edge lamination, while in another embodiment the pole structure has a closed edge lamination. In still another embodiment, the antiferromagnetic layers include predetermined patterns of nonmagnetic material.

    摘要翻译： 用于适用于高频信号操作的低噪声磁头中的层叠极结构是通过交错多个铁磁层和电绝缘反铁磁层形成的，以便在它们之间形成界面。 当形成界面表面以在铁磁层中建立具有预定永久交换钉扎方向的交换各向异性时，施加外部磁场。 交换各向异性可以是与外部磁场所定义的相同或相反的方向。 在一个实施例中，极结构具有开口边缘层叠，而在另一实施例中，极结构具有封闭边缘层叠。 在另一个实施例中，反铁磁层包括非磁性材料的预定图案。

    Method of forming a thin film magnetic structure having ferromagnetic and antiferromagnetic layers
    8.
    发明授权
    Method of forming a thin film magnetic structure having ferromagnetic and antiferromagnetic layers 失效
    形成具有铁磁性和反铁磁性层的薄膜磁性结构的方法

    公开(公告)号：US5612098A

    公开(公告)日：1997-03-18

    申请号：US696656

    申请日：1996-08-14

    申请人： Minshen Tan ,  Hua-Ching Tong ,  Francis H. Liu ,  Swie-In Tan

    发明人： Minshen Tan ,  Hua-Ching Tong ,  Francis H. Liu ,  Swie-In Tan

    IPC分类号： C23C14/35 ,  G01R33/09 ,  G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  H01F41/30 ,  C23C14/08

    CPC分类号： B82Y25/00 ,  B82Y40/00 ,  C23C14/351 ,  G01R33/093 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3903 ,  G11B5/3948 ,  H01F10/3218 ,  H01F10/3254 ,  H01F41/302 ,  Y10T428/265

    摘要： A method of forming a magnetic structure having layers with different magnetization orientations provided by a common magnetic bias layer includes the steps of depositing an antiferromagnetic layer between first and second ferromagnetic layers. During the deposition of the first and second ferromagnetic layers, magnetization fields of different orientations are employed separately to induce different directions of magnetization in the first and second layers. The different directions of magnetization in the first and second layers are sustained, through the process of exchange coupling, by the interposed antiferromagnetic layer which serves as the bias layer. A magnetic structure thus fabricated, can be used as a read transducer capable of generating differential signals with common mode noise rejection, and can be used as a magnetic pole for a magnetic head with reduced Barkhausen noise.

    摘要翻译： 形成具有由公共偏磁层提供的具有不同磁化取向的层的磁性结构的方法包括以下步骤：在第一和第二铁磁层之间沉积反铁磁性层。 在沉积第一和第二铁磁层期间，分别采用不同取向的磁化场以在第一和第二层中引起不同的磁化方向。 通过交换耦合的过程，通过用作偏置层的插入的反铁磁层来维持第一和第二层中不同的磁化方向。 如此制造的磁结构可以用作能够产生具有共模噪声抑制的差分信号的读取传感器，并且可以用作具有降低的巴克豪森噪声的磁头的磁极。

    Thin film magnetic structure having ferromagnetic and antiferromagnetic layers
    9.
    发明授权
    Thin film magnetic structure having ferromagnetic and antiferromagnetic layers 失效
    具有铁磁性和反铁磁性层的薄膜磁性结构

    公开(公告)号：US5876848A

    公开(公告)日：1999-03-02

    申请号：US794765

    申请日：1997-02-03

    申请人： Minshen Tan ,  Hua-Ching Tong ,  Francis H. Liu ,  Swie-In Tan

    发明人： Minshen Tan ,  Hua-Ching Tong ,  Francis H. Liu ,  Swie-In Tan

    IPC分类号： C23C14/35 ,  G01R33/09 ,  G11B5/31 ,  G11B5/39 ,  H01F10/32 ,  H01F41/30 ,  B05D5/12

    CPC分类号： B82Y25/00 ,  B82Y40/00 ,  C23C14/351 ,  G01R33/093 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3903 ,  G11B5/3948 ,  H01F10/3218 ,  H01F10/3254 ,  H01F41/302 ,  Y10T428/265

    摘要： A method of forming a magnetic structure having layers with different magnetization orientations provided by a common magnetic bias layer includes the steps of depositing an antiferromagnetic layer between first and second ferromagnetic layers. During the deposition of the first and second ferromagnetic layers, magnetization fields of different orientations are employed separately to induce different directions of magnetization in the first and second layers. The different directions of magnetization in the first and second layers are sustained, through the process of exchange coupling, by the interposed antiferromagnetic layer which serves as the bias layer. A magnetic structure thus fabricated, can be used as a read transducer capable of generating differential signals with common mode noise rejection, and can be used as a magnetic pole for a magnetic head with reduced Barkhausen noise.

    摘要翻译： 形成具有由公共偏磁层提供的具有不同磁化取向的层的磁性结构的方法包括以下步骤：在第一和第二铁磁层之间沉积反铁磁性层。 在沉积第一和第二铁磁层期间，分别采用不同取向的磁化场以在第一和第二层中引起不同的磁化方向。 通过交换耦合的过程，通过用作偏置层的插入的反铁磁层来维持第一和第二层中不同的磁化方向。 如此制造的磁结构可以用作能够产生具有共模噪声抑制的差分信号的读取传感器，并且可以用作具有降低的巴克豪森噪声的磁头的磁极。

    Method for making high speed, high areal density inductive write structure
    10.
    发明授权
    Method for making high speed, high areal density inductive write structure 失效
    制造高速，高密度感应写入结构的方法

    公开(公告)号：US07007372B1

    公开(公告)日：2006-03-07

    申请号：US10656311

    申请日：2003-09-05

    申请人： Yingjian Chen ,  Hua-Ching Tong ,  Lei Wang ,  Xizeng Shi

    发明人： Yingjian Chen ,  Hua-Ching Tong ,  Lei Wang ,  Xizeng Shi

    IPC分类号： G11B5/127 ,  H04R31/00

    CPC分类号： G11B5/3146 ,  G11B5/3109 ,  G11B5/3113 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3153 ,  G11B5/3967 ,  Y10T29/49032 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49071 ,  Y10T29/49073

    摘要： An inductive write element is disclosed for use in a magnetic data recording system. The write element provides increased data rate and data density capabilities through improved magnetic flux flow through the element. The write element includes a magnetic yoke constructed of first and second magnetic poles. The first pole includes a pedestal constructed of a high magnetic moment (high Bsat) material, which is preferably FeRhN nanocrystalline films with lamination layers of CoZrCr. The second pole includes a thin inner layer of high Bsat material (also preferably FeRhN nanocrystalline films with lamination layers of CoZrCr), the remainder being constructed of a magnetic material capable of being electroplated, such as a Ni—Fe alloy. An electrically conductive coil passes through the yoke between the first and second poles to induce a magnetic flux in the yoke when an electrical current is caused to flow through the coil. Magnetic flux in the yoke produces a fringing field at a write gap whereby a signal can be imparted onto a magnetic medium passing thereby.

    摘要翻译： 公开了用于磁数据记录系统的感应写入元件。 写元件通过改善通过元件的磁通量提供增加的数据速率和数据密度能力。 写元件包括由第一和第二磁极构成的磁轭。 第一极包括由高磁矩（高B sat sat）材料构成的基座，其优选为具有CoZrCr层压层的FeRhN纳米晶体膜。 第二极包括一高层高层材料的薄层（也优选具有CoZrCr叠层的FeRhN纳米晶膜），其余部分由能够电镀的磁性材料构成，例如Ni -Fe合金。 导电线圈通过第一和第二极之间的磁轭，当电流流过线圈时，引起磁轭中的磁通量。 轭中的磁通在写入间隙产生边缘场，由此可以将信号传递到通过的磁介质上。