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1. 发明授权

US08619510B1 Method for measurement of magnetic field gradient of recording magnetic field generated by magnetic head 有权
标题翻译：测量由磁头产生的记录磁场的磁场梯度的方法
公开(公告)号：US08619510B1
公开(公告)日：2013-12-31
申请号：US13600326
申请日：2012-08-31
申请人： Ken-ichi Takano , Satoshi Tomikawa , Tomohito Mizuno , Hiroshi Kiyono
发明人： Ken-ichi Takano , Satoshi Tomikawa , Tomohito Mizuno , Hiroshi Kiyono
IPC分类号： G11B11/00
CPC分类号： G11B5/455 , G11B5/02 , G11B2005/0021
摘要： A measurement method of a magnetic field gradient of a recording magnetic field generated by a magnetic head in a recording medium includes a step of locally heating the recording medium in a nonmagnetic field state where a magnetic field is not applied to the recording medium at all and measuring a temperature gradient of the recording medium in the nonmagnetic field state, a step of locally heating the recording medium in a recording magnetic field application state where the recording magnetic field is applied to the recording medium and measuring a temperature gradient of the recording medium in the recording magnetic field application state, and a step of calculating a magnetic field gradient of the recording magnetic field based on the temperature gradient of the recording medium in the nonmagnetic field state and the temperature gradient of the recording medium in the recording magnetic field application state.
摘要翻译：在记录介质中由磁头产生的记录磁场的磁场梯度的测量方法包括：在完全没有向记录介质施加磁场的非磁场状态下局部地加热记录介质的步骤，以及测量记录介质在非磁场状态下的温度梯度;在记录磁场施加状态下对记录介质进行局部加热的步骤，其中记录磁场被施加到记录介质上并测量记录介质的温度梯度记录磁场施加状态，以及基于非磁场状态下的记录介质的温度梯度和记录磁场施加状态下记录介质的温度梯度来计算记录磁场的磁场梯度的步骤。

2. 发明授权

US06426853B1 Magnetoresistive effect sensor, thin-film magnetic head and thin-film wafer with the thin-film magnetic heads 失效
标题翻译：磁阻效应传感器，薄膜磁头和具有薄膜磁头的薄膜晶片
公开(公告)号：US06426853B1
公开(公告)日：2002-07-30
申请号：US09440550
申请日：1999-11-15
申请人： Masanori Sakai , Ken-ichi Takano , Yuzuru Iwai
发明人： Masanori Sakai , Ken-ichi Takano , Yuzuru Iwai
IPC分类号： G11B539
CPC分类号： B82Y25/00 , G01R33/093
摘要： An MR sensor, a thin-film magnetic head and a thin-film wafer with a plurality of the thin-film magnetic heads having a MR multi-layered structure including a non-magnetic material layer, first and second ferromagnetic material layers (free and pinned layers) separated by the non-magnetic material layer, and an anti-ferromagnetic material layer formed adjacent to and in physical contact with one surface of the pinned layer, the one surface being on an opposite side of the pinned layer from the non-magnetic material layer, the multi-layered structure having ends in a direction parallel to a magnetically sensitive surface or an ABS, and longitudinal bias layers formed at both the ends of the MR multi-layered structure, for providing a longitudinal magnetic bias to the MR multi-layered structure. The MR multi-layered structure is shaped such that a magnetization direction of the pinned layer is inclined at an angle from an axis of easy magnetization of the pinned layer.
摘要翻译：一种MR传感器，薄膜磁头和具有多个薄膜磁头的薄膜晶片，具有包括非磁性材料层的MR多层结构，第一和第二铁磁材料层（游离和由非磁性材料层分离的被钉扎层，以及与钉扎层的一个表面相邻并物理接触形成的反铁磁材料层，该一个表面位于与非磁性材料层的钉扎层相反的一侧，磁性材料层，具有平行于磁敏表面或ABS的方向的端部的多层结构以及形成在MR多层结构的两端的纵向偏压层，用于向MR提供纵向磁偏置多层结构。 MR多层结构被成形为使得被钉扎层的磁化方向与被钉扎层的易磁化轴成一定角度倾斜。

3. 发明授权

US06173485B1 Method for manufacturing magnetic head apparatus with slider and suspension 有权
标题翻译：具有滑块和悬架的磁头装置制造方法
公开(公告)号：US06173485B1
公开(公告)日：2001-01-16
申请号：US09216851
申请日：1998-12-21
申请人： Masashi Shiraishi , Masanori Sakai , Tsuyoshi Umehara , Haruyuki Morita , Ken-ichi Takano
发明人： Masashi Shiraishi , Masanori Sakai , Tsuyoshi Umehara , Haruyuki Morita , Ken-ichi Takano
IPC分类号： G11B542
CPC分类号： G11B5/4806 , G11B5/48 , G11B33/121 , Y10T29/49027 , Y10T29/4903
摘要： A method for manufacturing a magnetic head apparatus includes a step of forming a plurality of flexure pieces coupled with each other and kept in substantially flat, each of the flexure pieces being provided with conductive connection pattern, a step of mounting sliders with magnetic head elements on the respective flexure pieces, or mounting head IC chips on the respective flexure pieces and after that mounting sliders with magnetic head elements on the respective flexure pieces, and a step of separating the flexure pieces with the sliders into individual pieces.
摘要翻译：一种磁头装置的制造方法，其特征在于，包括：形成多个彼此连结且保持基本平坦的挠曲件的步骤，每个弯曲件设置有导电连接图案，将具有磁头元件的滑块安装在相应的弯曲件或安装头IC芯片在相应的挠曲件上，之后在相应挠曲件上安装有磁头元件的滑块，以及将具有滑块的挠曲件分离为单独的部件的步骤。

4. 发明授权

US06469868B2 Thin film magnetic head having a nonmagnetic conductive layer and method of manufacturing same 有权
标题翻译：具有非磁性导电层的薄膜磁头及其制造方法
公开(公告)号：US06469868B2
公开(公告)日：2002-10-22
申请号：US09388936
申请日：1999-09-02
申请人： Takahiro Yamamoto , Noboru Yamanaka , Ken-ichi Takano
发明人： Takahiro Yamamoto , Noboru Yamanaka , Ken-ichi Takano
IPC分类号： G11B531
CPC分类号： G11B5/313 , G11B5/3143 , G11B5/3967
摘要： It is an object of the invention to improve characteristics of a thin-film magnetic head in the case where the frequency of data to write is high, in particular. In a thin-film magnetic head of the invention a nonmagnetic conductive member is provided to face at least part of a top pole layer of an induction-type magnetic transducer. Consequently, eddy currents are induced inside the nonmagnetic conductive member by a write current. The eddy currents suppress a magnetic field leaking from magnetic layers. In addition, the nonmagnetic conductive member is in contact with the top pole layer. Therefore, eddy currents generated inside the top pole layer are fed to the nonmagnetic conductive member, too. As a result, it is possible to prevent reductions in characteristics such as: a reduction in intensity of a write magnetic field due to eddy currents; an increase in delay between a write current and generation of a write magnetic field; and a decrease in gradient of rise of a write magnetic field with respect to time.
摘要翻译：特别是在要写入数据的频率高的情况下，本发明的目的是改进薄膜磁头的特性。在本发明的薄膜磁头中，提供非磁性导电构件以面对感应型磁换能器的顶极层的至少一部分。因此，通过写入电流在非磁性导电部件内部产生涡电流。涡流抑制从磁性层泄漏的磁场。此外，非磁性导电构件与顶极层接触。因此，在顶极层内产生的涡电流也被馈送到非磁性导电部件。结果，可以防止特性的降低，例如：由于涡流引起的写入磁场强度的降低; 写入电流和写入磁场的产生之间的延迟增加; 以及写入磁场相对于时间的上升的梯度的减小。

5. 发明授权

US06270588B1 Magnetoresistive effect sensor, thin-film magnetic head with the sensor and manufacturing method of the thin-film magnetic head 有权
标题翻译：磁阻效应传感器，具有传感器的薄膜磁头和薄膜磁头的制造方法
公开(公告)号：US06270588B1
公开(公告)日：2001-08-07
申请号：US09272615
申请日：1999-03-19
申请人： Ken-ichi Takano , Masato Takahashi , Nobuya Oyama
发明人： Ken-ichi Takano , Masato Takahashi , Nobuya Oyama
IPC分类号： H01F1032
CPC分类号： B82Y25/00 , B82Y10/00 , G01R33/09 , G11B5/3903 , G11B2005/3996 , H01F10/3268 , Y10T29/49034
摘要： A thin-film magnetic head having a spin valve effect multi-layered structure including a non-magnetic electrically conductive material layer, first and second ferromagnetic material layers separated by the non-magnetic electrically conductive material layer, and an anti-ferromagnetic material layer formed adjacent to and in physical contact with one surface of the second ferromagnetic material layer. This one surface is an opposite side from the non-magnetic electrically conductive material layer and the multi-layered structure has ends at its track-width direction. The head also has longitudinal bias means formed at both the track-width ends of the multi-layered structure, for providing a longitudinal magnetic bias to the multi-layered structure. The multi-layered structure and the longitudinal bias means are formed such that an angle between a direction of exchange coupling magnetic bias in the second ferromagnetic material layer produced by the exchange coupling with the anti-ferromagnetic material layer and a direction of the longitudinal magnetic bias in the second ferromagnetic material layer is more than 90° in at least part of the second ferromagnetic material layer.
摘要翻译：具有自旋阀效应的多层结构的薄膜磁头，包括非磁性导电材料层，由非磁性导电材料层分隔开的第一和第二铁磁材料层以及形成的反铁磁材料层与第二铁磁材料层的一个表面相邻并物理接触。该一个表面是与非磁性导电材料层相反的一侧，并且多层结构在其轨道宽度方向上结束。头部还具有形成在多层结构的轨道宽度端处的纵向偏置装置，用于向多层结构提供纵向磁偏置。多层结构和纵向偏置装置形成为使得通过与反铁磁材料层的交换耦合产生的第二铁磁材料层中的磁偏压的耦合方向和纵向磁偏压的方向之间的角度在第二铁磁材料层中的第二铁磁材料层的至少一部分中大于90°。

6. 发明授权

US07180705B2 Thin film magnetic head capable of reducing expansion and bending of a recording pattern, method of manufacturing the same and magnetic recording apparatus 有权
标题翻译：能够减少记录图案的扩张和弯曲的薄膜磁头，其制造方法和磁记录装置
公开(公告)号：US07180705B2
公开(公告)日：2007-02-20
申请号：US10405244
申请日：2003-04-03
申请人： Naoto Matono , Shigeru Shoji , Ken-ichi Takano
发明人： Naoto Matono , Shigeru Shoji , Ken-ichi Takano
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/00 , G11B5/012 , G11B5/1278 , G11B5/3146 , G11B2005/0029
摘要： Provided is a thin film magnetic head capable of reducing expansion and bending of a recording pattern resulting from a skew so as to improve recording performance. A main pole layer comprises a laminate including a bottom main pole layer being disposed on a medium-incoming side and having a first saturated magnetic flux density and a top main pole layer being disposed on a medium-outgoing side and having a second saturated magnetic flux density larger than the first saturated magnetic flux density. When magnetic flux flows in the main pole layer, magnetic flux saturation occurs in the bottom main pole layer with a smaller saturated magnetic flux density, however, no magnetic flux saturation occurs in the top main pole layer with a larger saturated magnetic flux density, so the magnetic flux flows mainly in the top main pole layer on a priority basis. Writing by the main pole layer is mainly performed by the top main pole layer on the medium-outgoing side, so compared with the case where the main pole layer has a large saturated magnetic flux density as a whole, expansion of the recording pattern resulting from the skew can be reduced.
摘要翻译：提供一种薄膜磁头，其能够减少由偏斜引起的记录图案的膨胀和弯曲，从而提高记录性能。主极层包括层叠体，其包括设置在中等入射侧的具有第一饱和磁通密度的底部主极层和设置在中间出射侧的顶部主极层，并具有第二饱和磁通量密度大于第一饱和磁通密度。当磁通量在主极层中流动时，在饱和磁通密度较小的底部主极层中产生磁通饱和度，但是在饱和磁通密度较高的顶部主极层中不会发生磁通饱和，因此磁通量主要在顶部主极层上优先流动。通过主极层的写入主要由中出射侧的顶部主极层进行，因此与主极层整体的饱和磁通密度大的情况相比，由于可以减少歪斜。

7. 发明授权

US06700368B2 Method and program for analyzing characteristics of a magnetic transducer 失效
标题翻译：用于分析磁换能器特性的方法和程序
公开(公告)号：US06700368B2
公开(公告)日：2004-03-02
申请号：US10192541
申请日：2002-07-11
申请人： Ken-ichi Takano
发明人： Ken-ichi Takano
IPC分类号： G01R3312
CPC分类号： G06F17/5018 , G06F2217/84
摘要： A method of analyzing characteristics of a magnetic transducer includes sub-dividing a region to be analyzed in a magnetic transducer into a plurality of polyhedral elements, and performing a transient calculation. The transient calculation includes calculating a transient electric field of each polyhedral element, calculating a transient magnetic field of each polyhedral element, and updating the magnetic permeability in accordance with a magnetic flux density determined from the calculated transient magnetic field. The steps of performing transient calculation are repeated until a predetermined number of time steps have been completed, in order to determine electric fields and magnetic fields of all of the plurality of polyhedral elements in the region to be analyzed.
摘要翻译：一种分析磁换能器的特性的方法包括将磁换能器中要分析的区域划分为多个多面体元件，并进行瞬态计算。瞬态计算包括计算每个多面体元件的瞬态电场，计算每个多面体元件的瞬态磁场，并根据从计算的瞬态磁场确定的磁通密度来更新磁导率。重复执行瞬态计算的步骤，直到完成了预定数量的时间步长，以便确定要分析的区域中的所有多个多面体元素的电场和磁场。

8. 发明授权

US06707294B2 Method and program for calculating reproduction track width of magnetoresistive effect head 失效
标题翻译：用于计算磁阻效应头再现轨迹宽度的方法和程序
公开(公告)号：US06707294B2
公开(公告)日：2004-03-16
申请号：US10173832
申请日：2002-06-19
申请人： Ken-ichi Takano
发明人： Ken-ichi Takano
IPC分类号： G01R3312
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3903 , G11B5/455 , G11B2005/0016 , G11B2005/3996 , Y10T29/49036
摘要： A method and computer program to calculate a reproduction track width of a MR head. This method begins by subdividing the magnetic domain control layer of a MR element and lead conductors into several polyhedral elements. Thereafter, electric potentials are calculated for each of the polyhedral elements based on the resistance at each layer. A current density is determined for each of the polyhedral elements based on the calculated electric potentials. The current densities are integrated to calculate an initial resistance value. Further, the resistance of a local block is changed by a predetermined amount. The electric potential is calculated for each of the polyhedral elements, current density is acquired, and the acquired current densities is calculated to determine a resistance value. Finally, the reproduction track width is obtained based on the initial acquired resistance value and the acquired resistance value.
摘要翻译：一种用于计算MR头的再现轨道宽度的方法和计算机程序。该方法通过将MR元件的磁畴控制层和引线导体分成几个多面体元件开始。此后，基于各层的电阻计算每个多面体元件的电位。基于所计算的电位，确定每个多面体元件的电流密度。集成电流密度以计算初始电阻值。此外，局部块的电阻改变预定量。对于每个多面体元素计算电位，获取电流密度，并且计算所获取的电流密度以确定电阻值。最后，基于初始获取的电阻值和所获取的电阻值来获得再现轨迹宽度。

9. 发明授权

US06333828B1 Magnetic disk unit with slider suspension assemblies and head IC chips 有权
标题翻译：具有滑块悬挂组件和磁头IC芯片的磁盘单元
公开(公告)号：US06333828B1
公开(公告)日：2001-12-25
申请号：US09285697
申请日：1999-04-05
申请人： Haruyuki Morita , Masanori Sakai , Ken-ichi Takano
发明人： Haruyuki Morita , Masanori Sakai , Ken-ichi Takano
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/4886 , G11B5/4976 , G11B33/121 , G11B33/14 , G11B2005/0013
摘要： A magnetic disk unit includes slider suspension assemblies, each of the assemblies having a slider with at least one magnetic head element and a suspension with one end portion and one surface, the slider being mounted on the one surface of the suspension at the one end portion, magnetic disks, each of the disks having at least one surface which opposes to the slider of the assembly, head IC chips electrically connected to the magnetic head elements, and a control circuit electrically connected with the head IC chips. The control circuit controls operations of each of the magnetic head elements so that the write current is applied to the magnetic head element for a first predetermined period of time and then the application of the write current to the magnetic head element is stopped for a second predetermined period of time which is equal to or longer than the first predetermined period.
摘要翻译：磁盘单元包括滑块悬架组件，每个组件具有带有至少一个磁头元件的滑块和具有一个端部和一个表面的悬架，滑块在一端部安装在悬架的一个表面上，磁盘，每个盘具有与组件的滑块相对的至少一个表面，与磁头元件电连接的头部IC芯片，以及与头部IC芯片电连接的控制电路。控制电路控制每个磁头元件的操作，使得写入电流在第一预定时间段内施加到磁头元件，然后停止对磁头元件的写入电流的施加第二预定的时间段等于或长于第一预定时段。

10. 发明授权

US6144530A Magnetic head apparatus with head IC chip 失效
标题翻译：带头IC芯片的磁头设备
公开(公告)号：US6144530A
公开(公告)日：2000-11-07
申请号：US198914
申请日：1998-11-24
申请人： Masashi Shiraishi , Masanori Sakai , Tsuyoshi Umehara , Haruyuki Morita , Ken-ichi Takano
发明人： Masashi Shiraishi , Masanori Sakai , Tsuyoshi Umehara , Haruyuki Morita , Ken-ichi Takano
IPC分类号： G11B5/60 , G11B5/48 , G11B21/21 , G11B21/16
CPC分类号： G11B5/4833 , G11B5/484
摘要： A magnetic head apparatus includes a slider with at least one magnetic head element, a suspension having one end portion, one surface and the other surface opposite to the one surface, for supporting the slider at the one end portion, a head IC chip mounted on the one surface of the suspension, and an air-cooled radiator member fixed on the other surface of the suspension.
摘要翻译：一种磁头装置，包括具有至少一个磁头元件的滑块，具有一个端部，一个表面和与该表面相对的另一个表面的悬架，用于在一个端部处支撑滑块，头部IC芯片安装在悬架的一个表面，以及固定在悬架的另一个表面上的风冷散热件。

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