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    Low noise magnetic head for high frequency recording
    2.
    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
    3.
    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。

    Magnetoresistive transducer having a common magnetic bias using assertive and complementary signals
    4.
    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。

    Thin film magnetic structure having ferromagnetic and antiferromagnetic layers
    5.
    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 of producing exchange coupled magnetic thin films with post-deposition annealing
    7.
    发明授权
    Method of producing exchange coupled magnetic thin films with post-deposition annealing 失效
    具有后沉积退火的交换耦合磁性薄膜的制备方法

    公开(公告)号：US5529814A

    公开(公告)日：1996-06-25

    申请号：US547694

    申请日：1995-10-19

    申请人： Minshen Tan ,  Hua-Ching Tong ,  Swie-In Tan

    发明人： Minshen Tan ,  Hua-Ching Tong ,  Swie-In Tan

    IPC分类号： G11B5/66 ,  G11B5/84 ,  B05D1/02

    CPC分类号： G11B5/66 ,  G11B5/84

    摘要： Exchange coupled magnetic thin films are produced by depositing an antiferromagnetic layer, followed by deposition of a layer of ferromagnetic material on the antiferromagnetic layer. The composite antiferromagnetic/ferromagnetic structure is then annealed at an elevated temperature for a predetermined length of time. This process results in considerably higher exchange coupling fields than obtainable before. Alternatively, the antiferromagnetic layer may be annealed prior to deposition of the ferromagnetic layer.

    摘要翻译： 交换耦合的磁性薄膜是通过沉积反铁磁性层，随后在反铁磁性层上沉积一层铁磁材料制成的。 然后将复合反铁磁/铁磁结构在升高的温度下退火预定的时间长度。 该过程导致比以前可获得的交换耦合场相当高的交换耦合场。 或者，反铁磁层可以在沉积铁磁层之前退火。

    Deposition of insulating thin film by a plurality of ion beams
    8.
    发明授权
    Deposition of insulating thin film by a plurality of ion beams 失效
    通过多个离子束沉积绝缘薄膜

    公开(公告)号：US5962080A

    公开(公告)日：1999-10-05

    申请号：US795161

    申请日：1997-02-10

    申请人： Minshen Tan ,  Swie-In Tan

    发明人： Minshen Tan ,  Swie-In Tan

    IPC分类号： C23C14/00 ,  C23C14/08 ,  C23C14/46 ,  C23C14/50 ,  G11B5/23 ,  G11B5/31 ,  G11B5/33 ,  G11B5/84

    CPC分类号： C23C14/0052 ,  C23C14/081 ,  C23C14/46 ,  C23C14/505 ,  G11B5/8404 ,  G11B5/232 ,  G11B5/313

    摘要： A method of depositing insulating thin films on a substrate employs a target that is formed of material which includes a constituent element of the insulating thin film. An ion beam preferably of inert gas is then directed toward the target to disperse the target material. Simultaneously, a second ion beam which includes another constituent element of the insulating thin film is also directed toward the substrate. The material from the target and the element of the second ion beam react in proper stoichiometry and is deposited onto the substrate as the insulating thin film.

    摘要翻译： 在衬底上沉积绝缘薄膜的方法采用由包含绝缘薄膜的构成元素的材料形成的靶。 然后将优选惰性气体的离子束指向靶以分散目标材料。 同时，包括绝缘薄膜的另一构成元件的第二离子束也被引向衬底。 来自目标的材料和第二离子束的元素以适当的化学计量反应并且作为绝缘薄膜沉积到衬底上。