公开(公告)号：US20060126229A1

公开(公告)日：2006-06-15

申请号：US11269479

申请日：2005-11-07

Applicant: Hubert Grimm ,  Jan Marien ,  Rolf Schaefer

Inventor： Hubert Grimm ,  Jan Marien ,  Rolf Schaefer

IPC: G11B5/33 ,  G11B5/127

CPC classification number: G11B5/022 ,  G11B5/00808 ,  G11B5/3948

Abstract: A magnetic sensor having at least a first and at least a second structure of soft-magnetic material that are spatially separated and define a first gap therebetween. The first and second structure of soft-magnetic material are adapted to form a gap magnetic field pointing in a direction substantially perpendicular to the elongation of the first gap in the vicinity of the first gap in response to an external magnetic field. Additionally, the magnetic sensor comprises at least a first magnetoresistive layered structure that is positioned in the vicinity of the first gap including inside the first gap and that is sensitive to the gap magnetic field.

公开(公告)号：US20060012922A1

公开(公告)日：2006-01-19

申请号：US11157858

申请日：2005-06-22

Applicant: Shigeru Shoji

Inventor： Shigeru Shoji

IPC: G11B5/33 ,  G11B5/127

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/3909 ,  G11B5/3948 ,  G11B2005/3996

Abstract: A magnetic sensor for an encoder has a sliding surface and detects magnetic field by keeping the sliding surface in contact with a surface of a magnetic medium to which a magnetic pattern with a predetermined magnetization pitch is recorded. The magnetic sensor includes a plurality of MR elements laminated with each other in a direction parallel to a direction of the magnetization pitch of the magnetic medium. Between two of the MR elements an insulation layer is sandwiched. Each of the MR elements has a plurality of linear sections.

Abstract translation: 用于编码器的磁传感器具有滑动表面，并且通过保持滑动表面与记录有预定磁化间距的磁性图案的磁介质的表面接触来检测磁场。 磁传感器包括在与磁介质的磁化间距的方向平行的方向上彼此层叠的多个MR元件。 在两个MR元件之间夹有绝缘层。 每个MR元件具有多个线性部分。

公开(公告)号：US06950289B2

公开(公告)日：2005-09-27

申请号：US10097294

申请日：2002-03-14

Applicant: Chuck Fai Lam ,  Kenneth R. Martin ,  Charles A. Gibson

Inventor： Chuck Fai Lam ,  Kenneth R. Martin ,  Charles A. Gibson

IPC: B24B37/013 ,  B24B37/04 ,  B24B49/04 ,  B24B49/10 ,  G11B5/187 ,  G11B5/31 ,  G11B5/39 ,  G11B5/29

CPC classification number: B24B37/013 ,  B24B37/048 ,  B24B49/04 ,  B24B49/10 ,  G11B5/1871 ,  G11B5/3103 ,  G11B5/3116 ,  G11B5/3166 ,  G11B5/3173 ,  G11B5/3948 ,  G11B5/3967 ,  Y10T29/49037

Abstract: A magnetic head cluster is provided along with a method of making a magnetic head cluster. The magnetic head cluster comprises a substrate having a plurality of magnetoresistive (MR) read and inductive magnetic write transducers and a plurality of terminals formed thereon. A plurality of lapping guides are also provided on the substrate between adjacent transducers.

Abstract translation: 提供磁头簇以及制造磁头簇的方法。 磁头簇包括具有多个磁阻（MR）读和磁性写磁换能器以及形成在其上的多个端子的衬底。 在相邻换能器之间的基板上还设置有多个研磨引导件。

公开(公告)号：US20050201022A1

公开(公告)日：2005-09-15

申请号：US10796387

申请日：2004-03-09

Applicant: Cheng Horng ,  Ru-Ying Tong

Inventor： Cheng Horng ,  Ru-Ying Tong

IPC: G01R33/09 ,  G11B5/127 ,  G11B5/33 ,  G11B5/39 ,  H01F10/16 ,  H01F10/32 ,  H01F41/18 ,  H01F41/30 ,  H01L43/08 ,  H01L43/12

CPC classification number: H01F10/3272 ,  B82Y25/00 ,  B82Y40/00 ,  G11B5/3906 ,  G11B5/3948 ,  H01F10/3259 ,  H01F10/3263 ,  H01F41/306 ,  H01L43/08 ,  H01L43/10 ,  H01L43/12

Abstract: A CPP-GMR spin value sensor structure with an improved MR ratio and increased resistance is disclosed. All layers except certain pinned layers, copper spacers, and a Ta capping layer are oxygen doped by adding a partial O2 pressure to the Ar sputtering gas during deposition. Oxygen doped CoFe free and pinned layers are made slightly thicker to offset a small decrease in magnetic moment caused by the oxygen dopant. Incorporating oxygen in the MnPt AFM layer enhances the exchange bias strength. An insertion layer such as a nano-oxide layer is included in one or more of the free, pinned, and spacer layers to increase interfacial scattering. The thickness of all layers except the copper spacer may be increased to enhance bulk scattering. A CPP-GMR single or dual spin valve of the present invention has up to a threefold increase in resistance and a 2 to 3% increase in MR ratio.

Abstract translation: 公开了具有改进的MR比和增加的电阻的CPP-GMR自旋值传感器结构。 除了某些被钉扎层，铜间隔物和Ta覆盖层之外的所有层通过在沉积期间向Ar溅射气体添加部分O 2 O 2压力而进行氧掺杂。 氧掺杂的CoFe自由和被钉扎层被制成稍微更厚以抵消由氧掺杂剂引起的小的磁矩的减小。 在MnPt AFM层中掺入氧增强了交换偏压强度。 诸如纳米氧化物层之类的插入层被包括在一个或多个游离，钉扎和间隔层中以增加界面散射。 除了铜间隔物之外的所有层的厚度可以增加以增加体散射。 本发明的CPP-GMR单自旋阀或双自旋阀的电阻增加了三倍，MR比增加了2〜3％。

公开(公告)号：US06798623B2

公开(公告)日：2004-09-28

申请号：US09683191

申请日：2001-11-29

Applicant: Michael Allen Seigler ,  Petrus Antonius Van der Heijden

Inventor： Michael Allen Seigler ,  Petrus Antonius Van der Heijden

IPC: G11B5127

CPC classification number: G01R33/093 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/012 ,  G11B5/3903 ,  G11B5/3948 ,  G11B5/4886 ,  G11B2005/0008 ,  G11B2005/3996

Abstract: Disclosed is a magnetoresistive magnetic field sensor wherein the sense current flows perpendicular to the plane of the layers of the sensor. The sensor is biased into a linear operating region of the transfer curve using the sense current or a permanent magnet in conjunction with the sense current.

Abstract translation: 公开了一种磁阻磁场传感器，其中感测电流垂直于传感器的层的平面流动。 传感器利用检测电流或永久磁铁结合感应电流偏置到传输曲线的线性运行区域。

公开(公告)号：US20040086752A1

公开(公告)日：2004-05-06

申请号：US10693283

申请日：2003-10-24

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO.

Inventor： Nozomu Matsukawa ,  Akihiro Odagawa ,  Yasunari Sugita ,  Mitsuo Satomi ,  Yoshio Kawashima ,  Masayoshi Hiramoto

IPC: B32B009/00

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  B82Y40/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3909 ,  G11B5/3948 ,  G11B2005/3996 ,  H01F41/302 ,  H01L43/08 ,  Y10T428/1143 ,  Y10T428/115

Abstract: The present invention provides a magnetoresistive element that has excellent magnetoresistance characteristics over a conventional magnetoresistive element. The magnetoresistive element is produced by a method including heat treatment at 330null C. or more and characterized in that the longest distance from a centerline of a non-magnetic layer to the interfaces between a pair of ferromagnetic layers and the non-magnetic layer is not more than 10 nm. This element can be produced, e.g., by forming an underlying film on a substrate, heat-treating the underlying film at 400null C. or more, decreasing surface roughness by irradiating the surface of the underlying film with an ion beam, and forming the ferromagnetic layers and the non-magnetic layer. The longest distance is reduced relatively even when M1 (at least one element selected from Tc, Re, Ru, Os, Rh, Ir, Pd, Pt, Cu, Ag and Au) is added to the ferromagnetic layers in the range of 2 nm from the interfaces with the non-magnetic layer.

Abstract translation: 本发明提供了一种磁阻元件，它比传统的磁阻元件具有优异的磁阻特性。 磁阻元件是通过在330℃以上的热处理的方法制造的，其特征在于，从非磁性层的中心线到一对铁磁层与非磁性层之间的界面的最长距离为 不超过10nm。 该元件可以例如通过在基底上形成下面的膜，在400℃或更高温度下对下面的膜进行热处理，通过用离子束照射下面的膜的表面来降低表面粗糙度，并形成 铁磁层和非磁性层。 即使当M 1（从Tc，Re，Ru，Os，Rh，Ir，Pd，Pt，Cu，Ag和Au中选择的至少一种元素）加入到铁磁层中时，相对较长的距离也相对减小 从与非磁性层的界面为2nm。

公开(公告)号：US06697231B1

公开(公告)日：2004-02-24

申请号：US09535307

申请日：2000-03-24

Applicant: Katsuya Kikuiri

Inventor： Katsuya Kikuiri

IPC: G11B2104

CPC classification number: G11B5/3948 ,  G11B5/3103 ,  G11B5/3106 ,  G11B5/3903 ,  G11B5/3967 ,  G11B5/397 ,  G11B5/4893 ,  G11B5/52 ,  G11B5/53 ,  G11B5/534

Abstract: A thin film magnetic head includes a head element portion stacked on a side surface of a substrate having two opposed planes, two opposed side surfaces intersecting the planes, and a tape slide surface provided at one end portion of the planes and the side surfaces. At least one of a magnetic gap Gb of an induction type magnetic head and a magneto-resistive effect element Ga of a magneto-resistive effect type magnetic head are exposed on the tape slide surface, and a bonding pad 3 is connected to the head element portion, wherein an angle made by one of the side surfaces on which the head element portion and the bonding pad are provided and one of the planes constitutes an azimuth angle.

Abstract translation: 薄膜磁头包括堆叠在具有两个相对平面的基板的侧表面上的头元件部分，与平面相交的两个相对的侧表面，以及设置在平面和侧表面的一个端部处的带滑动表面。 感应型磁头的磁隙Gb和磁阻效应型磁头的磁阻效应元件Ga中的至少一个暴露在磁带滑动表面上，并且焊盘3连接到磁头元件 其中由设置有头元件部分和接合焊盘的一个侧表面制成的角度和其中一个平面构成方位角。

公开(公告)号：US06633460B2

公开(公告)日：2003-10-14

申请号：US09938044

申请日：2001-08-23

Applicant: Tsutomu Takeya

Inventor： Tsutomu Takeya

IPC: G11B539

CPC classification number: G11B5/3903 ,  G11B5/09 ,  G11B5/3103 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3948 ,  Y10T428/1143

Abstract: A magnetic head is provided that has a smaller amount of change in asymmetry with respect to the MR height, and has an improved resolution for a reproduction signal. In a magnetic head including a magnetoresistive device as a read device for reading magnetic recording information recorded on a magnetic recording medium, the magnetostriction constant of a soft magnetic substance forming the magnetoresistive device is 0 or below. Since the magnetostriction constant of the magnetoresistive device is 0 or below, the amount of change in asymmetry with respect to the MR height is reduced. Therefore, even when the MR height is slightly changed, the asymmetry does not vary significantly.

Abstract translation: 提供了一种磁头，其相对于MR高度具有较小的不对称变化量，并且对再现信号具有改进的分辨率。 在包括作为用于读取记录在磁记录介质上的磁记录信息的读装置的磁阻装置的磁头中，形成磁阻装置的软磁体的磁致伸缩常数为0或更低。 由于磁阻器件的磁致伸缩常数为0以下，所以相对于MR高度的不对称变化量减少。 因此，即使MR高度略有变化，不对称也不会显着变化

公开(公告)号：US20020181167A1

公开(公告)日：2002-12-05

申请号：US10193497

申请日：2002-07-11

Inventor： Richard Joseph Gambino ,  Thomas Penney III ,  John Casimir Slonczewski

IPC: G11B005/39

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3948 ,  G11B2005/3996 ,  Y10T29/49044

Abstract: A magnetic field sensor is described incorporating a plurality of magnetic stripes spaced apart on the surface of a substrate such that the stray magnetic fields at the ends of the magnetic stripes are magnetostatically coupled and the magnetic stripes are magnetized respectively in alternating directions, nonmagnetic conductive material positioned in the spaces between the magnetic stripes and electrodes for passing current crosswise through the plurality of magnetic stripes to detect a change in resistance by the giant magnetoresistive effect (MGR). The invention overcomes the problem of detecting low magnetic fields since the magnetic fields required to saturate magnetic stripes depends on the magnetostatic coupling which in turn can be controlled by the geometry and position of the magnetic stripes in the sensor.

Abstract translation: 磁场传感器被描述为包括在衬底的表面上间隔开的多个磁条，使得磁条端部处的杂散磁场被磁静耦合并且磁条分别在交替方向被磁化，非磁性导电材料 位于磁条和电极之间的空间中，用于使电流横穿多个磁条，以通过巨磁阻效应（MGR）检测电阻的变化。 本发明克服了检测低磁场的问题，因为使磁条饱和所需的磁场取决于静磁耦合，静磁耦合又可以由传感器中的磁条的几何形状和位置来控制。

公开(公告)号：US20020135919A1

公开(公告)日：2002-09-26

申请号：US09956977

申请日：2001-09-21

Inventor： Reijiro Tsuchiya

IPC: G11B015/12

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/2652 ,  G11B5/3103 ,  G11B5/3909 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4984 ,  G11B20/18 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996 ,  G11B2020/183

Abstract: Because a conventional magnetic head has a structure, in which a MR element and a recording element are stacked, there are cases in which a recording magnetic field affects the MR element, inducing changes in the characteristics of the MR element. An object of the present invention is to lessen the influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element like this, stabilize the performance of the MR element, and enhance the reliability of the magnetic disk drive using a MR element. Further, another object of the present invention is to provide a magnetic disk drive that is capable of improve reliability by using a composite magnet head, which makes a plurality of reproduction elements/reproduction heads correspond to one recording head. The present invention constitutes a composite magnetic head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element. Further, the object of the present invention is achieved by constituting a magnetic disk drive, in which one of a plurality of reproduction elements is selected and used in reproduction. The present invention enables the provision of a magnetic disk drive, which is equipped with a composite magnetic head having a plurality of reproduction elements, and in which one of a plurality of reproduction elements is selected and used in the reproduction of information, and a magnetic disk drive, which utilizes a composite magnetic head formed such that the magnetically sensitive layers of a plurality of reproduction elements do not overlap with the normal direction projection of the recording element.