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    Magnetoresistive magnetic field sensor
    41.
    发明授权
    Magnetoresistive magnetic field sensor 失效
    磁阻磁场传感器

    公开(公告)号：US06278588B1

    公开(公告)日：2001-08-21

    申请号：US09431579

    申请日：1999-11-01

    Applicant: Jacobus J. M. Ruigrok

    Inventor： Jacobus J. M. Ruigrok

    IPC: G11B539

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/00 ,  G11B5/3903 ,  G11B5/3925 ,  G11B5/3967 ,  G11B2005/3996 ,  H01F10/32

    Abstract: A magnetoresistive magnetic field sensor comprises a bilayer with a first soft magnetic layer and in direct contact therewith a second soft magnetic layer. The layers are exchange coupled to one another. The second soft magnetic layer is located below, on or in the first soft magnetic layer in a meandering, spiraling or suchlike structure. The electrical resistivity of the first soft magnetic layer is higher than that of the second soft magnetic layer, while the difference in electrical resistivity between both soft magnetic layers is at least a factor of 10, preferably a factor of 100. The magnetoresistive magnetic field sensor is applied in a magnetic read head device for a recording information system.

    Abstract translation: 磁阻磁场传感器包括具有第一软磁层并与第二软磁层直接接触的双层。 这些层彼此交换耦合。 第二软磁层位于第一软磁层的下方，上方或第一软磁层中，其曲折，螺旋形或类似结构。 第一软磁层的电阻率高于第二软磁层的电阻率，而两个软磁层之间的电阻差为至少10倍，优选为100倍。磁阻磁场传感器 被应用于用于记录信息系统的磁读头装置中。

    Magnetoresistive detector comprising a layer structure and a current directing means
    43.
    发明授权
    Magnetoresistive detector comprising a layer structure and a current directing means 失效
    磁阻检测器，包括层结构和电流引导装置

    公开(公告)号：US06215301B1

    公开(公告)日：2001-04-10

    申请号：US09174788

    申请日：1998-10-19

    Applicant: Kars-Michiel H. Lenssen

    Inventor： Kars-Michiel H. Lenssen

    IPC: G01R3302

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/3996 ,  H04R15/00 ,  Y10T428/24917

    Abstract: Element comprising a substrate (101) having a layer structure (103) bounded by two parallel main faces (105a, 105b) with at least two layers of mutually different magnetical behavior. The layer structure has a zone (109) which, viewed in a direction parallel to the main faces, extends between spaced electric connection areas (107a, 107b). A current-directing means is present in this zone for producing, during current passage, a current component (cp) directed transversely to the layer structure, which means comprises at least one electric conductor (111a, 111b) on at least one of the main faces.

    Abstract translation: 元件包括具有由具有至少两层相互不同的磁性行为的两个平行主面（105a，105b）界定的层结构（103）的基底（101）。 该层结构具有从平行于主面的方向观察的区域（109），其在间隔开的电连接区域（107a，107b）之间延伸。 在该区域中存在电流引导装置，用于在电流通过期间产生横向于层结构的电流分量（cp），该电流分量（cp）包括至少一个主导体上的电导体（111a，111b） 面孔

    Methods for creating a magnetically permeable film
    44.
    发明授权
    Methods for creating a magnetically permeable film 失效
    用于制造导磁膜的方法

    公开(公告)号：US6110539A

    公开(公告)日：2000-08-29

    申请号：US239137

    申请日：1999-01-27

    Applicant: Pascal J.H. Bloemen ,  Jacobus J.M. Ruigrok

    Inventor： Pascal J.H. Bloemen ,  Jacobus J.M. Ruigrok

    IPC: G11B5/31 ,  G11B5/39 ,  G11B5/85 ,  H01F41/14 ,  H01F41/18 ,  H01F41/30 ,  H01F1/00

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  B82Y40/00 ,  G11B5/3925 ,  H01F41/14 ,  H01F41/18 ,  H01F41/30 ,  G11B2005/3996 ,  G11B5/3113 ,  G11B5/3163

    Abstract: A method for creating a magnetically permeable film on a substrate surface by deposition of successive layers of a magnetic material, during deposition of each layer a magnetic field being provided near said surface having a field direction substantially parallel to the surface. In order to tune the permeability of the magnetic material the method builds up the magnetically permeable film by forming each layer by depositing a ferromagnetic material to a thickness maximally corresponding to substantially ##EQU1## where L.sub.ex is equal to ##EQU2## with A being the exchange constant of the ferromagnetic material and K.sub.u being the uniaxial anisotropy constant, and changing the magnetic field direction during formation of said layer by an angle other than substantially 180.degree..

    Abstract translation: 一种通过沉积磁性材料的连续层来在基底表面上形成导磁膜的方法，每个层的沉积期间在所述表面附近提供磁场，该磁场具有基本上平行于该表面的场方向。 为了调整磁性材料的磁导率，该方法通过将铁磁材料沉积到基本上相当于其中Lex等于A的厚度来形成每个层来建立导磁膜，其中A A是铁磁材料的交换常数， Ku是单轴各向异性常数，并且在形成所述层期间以大致180度以外的角度改变磁场方向。

    Spin valve film
    45.
    发明授权
    Spin valve film 失效
    旋转阀膜

    公开(公告)号：US5849422A

    公开(公告)日：1998-12-15

    申请号：US932700

    申请日：1997-09-18

    Applicant: Kazuhiko Hayashi

    Inventor： Kazuhiko Hayashi

    IPC: G01R33/09 ,  G11B5/31 ,  G11B5/39 ,  G11B5/40 ,  H01F10/00 ,  H01F10/32 ,  H01L43/02 ,  H01L43/08 ,  H01L43/10

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3925 ,  H01F10/3204 ,  H01F10/3268 ,  H01L43/10 ,  G11B2005/3996 ,  G11B5/3106 ,  G11B5/3932 ,  G11B5/40 ,  Y10S428/928 ,  Y10T428/12465 ,  Y10T428/12576 ,  Y10T428/12611 ,  Y10T428/12625 ,  Y10T428/12861 ,  Y10T428/12951

    Abstract: Disclosed is a spin valve film having a first magnetic layer, a non-magnetic layer, a second magnetic layer, and an antiferromagnetic layer as the fundamental structure for the film. In such structure of the spin valve film, a single-layered film or a multi-layered film consisting of CoZrNb, CoZrMo, FeSiAl or FeSi, or a material prepared by adding Cr, Mn, Pt, Ni, Cu, Ag, Al, Ti, Fe, Co or Zn to the above-mentioned substance is used for at least one of the first magnetic layer and second magnetic layer. According to the present invention, a thin spin valve film having a good sensitivity with respect to magnetic field and a significant magnetoresistive effect can be obtained. When using this thin film for a shield reproducing head or a yoke reproducing head, the maximum reproducing output obtainable is approximately four times that of a reproducing head which utilizes the magnetoresistive effect provided by the application of the prior art.

    Abstract translation: 公开了具有第一磁性层，非磁性层，第二磁性层和反铁磁层作为膜的基本结构的自旋阀膜。 在自旋阀膜的这种结构中，单层膜或由CoZrNb，CoZrMo，FeSiAl或FeSi组成的多层膜，或通过添加Cr，Mn，Pt，Ni，Cu，Ag，Al， Ti，Fe，Co或Zn与上述物质用于第一磁性层和第二磁性层中的至少一个。 根据本发明，可以获得具有相对于磁场的良好的灵敏度和显着的磁阻效应的薄的自旋阀膜。 当使用该薄膜作为屏蔽再现头或磁轭再现头时，可获得的最大再现输出大约是利用现有技术应用提供的磁阻效应的再现磁头的四倍。

    Low noise magnetic head for high frequency recording
    46.
    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

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

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

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

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

    Abstract: 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.

    Abstract translation: 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。

    Yoke spin valve MR read head
    50.
    发明授权
    Yoke spin valve MR read head 失效
    轭式旋转阀MR读头

    公开(公告)号：US5493467A

    公开(公告)日：1996-02-20

    申请号：US364913

    申请日：1994-12-27

    Applicant: William C. Cain ,  Robert Fontana ,  Hugo A. Santini ,  Mason L. Williams, III

    Inventor： William C. Cain ,  Robert Fontana ,  Hugo A. Santini ,  Mason L. Williams, III

    IPC: G11B5/00 ,  G11B5/39 ,  G11B5/147 ,  G11B5/235

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3903 ,  G11B5/3925 ,  G11B2005/0016 ,  G11B2005/3996

    Abstract: The present invention is a yoke spin valve MR read head which electrically connects a spin valve MR sensor to spaced apart yoke portions. First and second yoke pieces are electrically connected at a head surface and are insulated from one another at a back gap which is remotely located from the head surface. The first yoke piece has a break which divides it into first and second portions which are spaced from one another. The spin valve MR sensor is located within this break and electrically interconnects the first and second portions of the first yoke piece. First and second leads are connected to the first and second yoke pieces respectively and receive a current from a current source for applying a sense current to the spin valve MR sensor via the first and second yoke pieces. When a magnetic medium is moved adjacent the head surface of the read head the yoke pieces serve as conductors for transmitting sense current to the spin valve MR sensor as well as functioning as a flux guide. Flux incursions propagated from the magnetic medium to the spin valve MR sensor via the yoke cause relative rotations between directions of magnetic moments of a pinned layer and a free layer which correspond to signals which can be processed by a signal processing device. The signal strength of the yoke spin valve MR sensor is superior to an anisotropic MR sensor and is easier to fabricate.

    Abstract translation: 本发明是将自旋阀MR传感器与间隔开的磁轭部分电连接的磁轭自旋阀MR读头。 第一和第二轭片在头表面处电连接并且在远离头表面的后间隙处彼此绝缘。 第一轭片具有将其分成彼此间隔开的第一和第二部分的断裂。 自旋阀MR传感器位于该断裂之内并电互连第一轭片的第一和第二部分。 第一和第二引线分别连接到第一和第二磁轭，并且从电流源接收电流，用于经由第一和第二磁轭将感测电流施加到自旋阀MR传感器。 当磁性介质在读头的头表面附近移动时，轭件用作用于将感应电流传递到自旋阀MR传感器以及用作磁通引导件的导体。 通过轭从磁介质传播到自旋阀MR传感器的磁通入侵引起与被信号处理装置处理的信号相对应的钉扎层和自由层的磁矩方向之间的相对旋转。 轭自旋阀MR传感器的信号强度优于各向异性MR传感器，并且制造更容易。

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