公开(公告)号：US08542456B2

公开(公告)日：2013-09-24

申请号：US13218150

申请日：2011-08-25

申请人： Takekazu Yamane ,  Yosuke Antoku ,  Katsuki Kurihara ,  Norio Takahashi ,  Kenzo Makino

发明人： Takekazu Yamane ,  Yosuke Antoku ,  Katsuki Kurihara ,  Norio Takahashi ,  Kenzo Makino

IPC分类号： G11B5/127 ,  G11B21/02 ,  G11B5/48 ,  G11B5/02

CPC分类号： G11B5/6076 ,  G11B5/3133 ,  G11B5/3136 ,  G11B5/3146 ,  G11B5/607

摘要： A magnetic head includes a medium facing surface that faces a surface of a recording medium, a write head section, a contact sensor that detects contact of the medium facing surface with the surface of the recording medium, and a heat sink adjacent to the contact sensor. The write head section has a magnetic pole that produces a write magnetic field for writing data on the recording medium. The contact sensor and the heat sink have respective end faces located in the medium facing surface. The contact sensor varies in resistance in response to temperature variations, and is to be energized. The heat sink includes an intermediate layer made of a nonmagnetic metal material, and two ferromagnetic layers made of a metal-based magnetic material, the two ferromagnetic layers being disposed with the intermediate layer therebetween, and being antiferromagnetically exchange-coupled to each other via the intermediate layer.

摘要翻译： 磁头包括面向记录介质的表面的介质面向表面，写入头部分，检测介质面向表面与记录介质表面的接触的接触传感器以及与接触传感器相邻的散热器 。 写头部分具有产生用于在记录介质上写入数据的写入磁场的磁极。 接触传感器和散热器具有位于介质面对表面中的相应端面。 接触传感器响应于温度变化而变化，并且被通电。 散热器包括由非磁性金属材料制成的中间层和由金属基磁性材料制成的两个铁磁层，所述两个铁磁层在其间具有中间层，并经由该铁磁材料彼此反铁磁交换耦合 中间层。

公开(公告)号：US08213117B2

公开(公告)日：2012-07-03

申请号：US12794148

申请日：2010-06-04

申请人： Yosuke Antoku ,  Norio Takahashi ,  Katsuki Kurihara

发明人： Yosuke Antoku ,  Norio Takahashi ,  Katsuki Kurihara

IPC分类号： G11B5/127

CPC分类号： G11B5/6011 ,  G11B5/3163 ,  G11B5/607 ,  Y10T29/49027

摘要： A magnetic head includes a reproducing element for reproducing information recorded on a magnetic recording medium, a recording element for recording information on the magnetic recording medium, and a heating resistor. The magnetic head has a magnetic medium-facing surface on which the reproducing element and the recording element are exposed.The magnetic head is obtained as follows: (1) a protective film is formed to cover the magnetic medium-facing surface; (2) within a case of a magnetic recording/reproducing apparatus including the magnetic recording medium, the magnetic medium-facing surface is opposed to a surface of the magnetic recording medium; (3) the heating resistor is allowed to generate heat by power supply while rotating the magnetic recording medium, wherein thermal expansion due to the heat generation causes bulging of the magnetic medium-facing surface, bringing the protective film into contact with the magnetic recording medium; and (4) a portion of the protective film covering at least one of the reproducing element and the recording element is removed by scraping.

摘要翻译： 磁头包括用于再现记录在磁记录介质上的信息的再现元件，用于在磁记录介质上记录信息的记录元件和加热电阻器。 磁头具有面向再现元件和记录元件的金属介质表面。 磁头如下获得：（1）形成保护膜以覆盖面向磁介质的表面; （2）在包括磁记录介质的磁记录/再现装置的情况下，磁介质面向表面与磁记录介质的表面相对; （3）使加热电阻器在旋转磁记录介质的同时通过供电产生热量，其中由于发热引起的热膨胀导致磁介质面向表面的膨胀，使保护膜与磁记录介质接触 ; 和（4）通过刮擦除去覆盖再现元件和记录元件中的至少一个的保护膜的一部分。

公开(公告)号：US08144427B2

公开(公告)日：2012-03-27

申请号：US12274470

申请日：2008-11-20

申请人： Yosuke Antoku ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

发明人： Yosuke Antoku ,  Takeo Kagami ,  Katsuki Kurihara ,  Taro Oike ,  Masashi Sano

IPC分类号： G11B5/10 ,  G11B5/56

CPC分类号： G11B5/314 ,  G11B5/6064 ,  G11B5/607 ,  G11B5/6076 ,  G11B2005/0005

摘要： The present invention relates to a magnetic head, a head assembly, and a magnetic recording/reproducing apparatus which are capable of effectively detecting thermal asperity. The magnetic head according to the present invention includes a heat-generating resistor, a recording coil, and a resistive element. The heat-generating resistor is adapted to generate heat when power is fed thereto so that the heat generation causes at least a part of the air bearing surface to thermally expand and protrude. The recording coil is adapted to generate a recording magnetic field, and the resistive element is disposed closer to the air bearing surface than the recording coil and connected in series or in parallel with the heater. Thus, the resistive element can share a common wiring with the heater for power feeding, which eliminates the waste of wiring and achieves miniaturization.

摘要翻译： 本发明涉及能够有效地检测热凹凸的磁头，磁头组件和磁记录/重放装置。 根据本发明的磁头包括发热电阻器，记录线圈和电阻元件。 发热电阻适用于在供电时产生热量，使得发热导致空气轴承表面的至少一部分热膨胀和突出。 记录线圈适于产生记录磁场，并且电阻元件设置为比记录线圈更靠近空气轴承表面并与加热器串联或并联连接。 因此，电阻元件可以与用于供电的加热器共用公共布线，这消除了布线的浪费并实现了小型化。

公开(公告)号：US08373947B1

公开(公告)日：2013-02-12

申请号：US13248590

申请日：2011-09-29

申请人： Tatsuhiro Nojima ,  Masashi Sano ,  Yosuke Antoku ,  Mutsumi Fujita ,  Isamu Toba ,  Norio Takahashi ,  Hideyuki Ukita

发明人： Tatsuhiro Nojima ,  Masashi Sano ,  Yosuke Antoku ,  Mutsumi Fujita ,  Isamu Toba ,  Norio Takahashi ,  Hideyuki Ukita

IPC分类号： G11B5/39

CPC分类号： G11B5/3106 ,  G11B5/6011

摘要： A magnetic head slider includes a magnetic recording part and/or a reproducing part. The magnetic head slider includes a resistance film having temperature dependence of electrical resistance, the resistance film being positioned in the vicinity of an air bearing surface or on the air bearing surface, separately from the magnetic recording part and the reproducing part. The magnetic head slider further includes a first protective film with a smaller milling rate than the resistance film, the first protective film contacting a lower surface of the resistance film in a lamination direction of the magnetic head slider and on the air bearing surface, and/or a second protective film with a smaller milling rate than the resistance film, the second protective film contacting an upper surface of the resistance film in the lamination direction of the magnetic head slider and on the air bearing surface.

摘要翻译： 磁头滑块包括磁记录部和/或再现部。 磁头滑动器包括具有电阻温度依赖性的电阻膜，电阻膜位于空气支承表面附近或空气支承表面附近，与磁记录部分和再现部分分开。 磁头滑块还包括具有比电阻膜更小的研磨速度的第一保护膜，第一保护膜在磁头滑块的层叠方向和空气轴承表面上接触电阻膜的下表面，和/ 或具有比电阻膜更小的研磨速度的第二保护膜，第二保护膜在磁头滑块的层叠方向和空气轴承表面上接触电阻膜的上表面。

公开(公告)号：US08552328B2

公开(公告)日：2013-10-08

申请号：US11966025

申请日：2007-12-28

申请人： Takumi Yanagisawa ,  Yosuke Antoku ,  Yoshikazu Sawada

发明人： Takumi Yanagisawa ,  Yosuke Antoku ,  Yoshikazu Sawada

IPC分类号： G11B5/37

CPC分类号： G11B5/40 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/098 ,  G11B5/3906 ,  G11B2005/0016 ,  G11B2005/3996

摘要： The invention provides a method for fixing up the deterioration of a magneto-resistive effect device. A hard disk system is provided in it with a head heating means for heating a thin-film magnetic head, and by that head heating means, a defective site of the magneto-resistive effect device, which occurs as the hard disk system is in operation and is confined in a quasi-stable state, is fixed up in such a way as to return back to its own normal stable state. Thus, the deteriorated site of the magneto-resistive effect device (reproducing device) in the thin-film magnetic head, which is caused by the so-called thermal asperity as the hard disk system is in operation, is fixed up while it remains built in the hard disk system, i.e., without dismantling the hard disk system.

摘要翻译： 本发明提供了一种用于固定磁阻效应装置的劣化的方法。 在其中设置有用于加热薄膜磁头的磁头加热装置和由该磁头加热装置在磁盘系统运行时发生的磁阻效应装置的缺陷部位的硬盘系统 并且被限制在准稳定状态，被固定为使其返回到其自己的正常稳定状态。 因此，由硬盘系统所谓的热不均匀性引起的薄膜磁头中的磁阻效应器件（再现装置）的劣化位置在其保持构建的同时被固定 在硬盘系统中，即不拆卸硬盘系统。

公开(公告)号：US20110216430A1

公开(公告)日：2011-09-08

申请号：US12718404

申请日：2010-03-05

申请人： Takayasu KANAYA ,  Yosuke Antoku ,  Kazuki Sato ,  Takayuki Nishizawa ,  Masaru Ilda

发明人： Takayasu KANAYA ,  Yosuke Antoku ,  Kazuki Sato ,  Takayuki Nishizawa ,  Masaru Ilda

IPC分类号： G11B27/36

CPC分类号： G11B27/36

摘要： A magnetic head disposed in a slider arranged with an interval with respect to a magnetic disk includes a sensor that is positioned in a stepped-back position from an air bearing surface facing the magnetic disk, an insulating film that is positioned on the air bearing surface and that covers the sensor; a pair of lead films, the lead films being electrically connected to the sensor such that at least portions of the lead films are exposed on the air bearing surface, and being configured to transfer a temperature change of the air bearing surface to the sensor.

摘要翻译： 设置在相对于磁盘间隔设置的滑块中的磁头包括从面向磁盘的空气轴承表面位于后退位置的传感器，位于空气支承表面上的绝缘膜 覆盖传感器; 一对引线膜，所述引线膜电连接到所述传感器，使得所述引线膜的至少一部分暴露在所述空气轴承表面上，并且被配置为将所述空气轴承表面的温度变化传递到所述传感器。

公开(公告)号：US20080266718A1

公开(公告)日：2008-10-30

申请号：US11740015

申请日：2007-04-25

申请人： Shunji Saruki ,  Takumi Uesugi ,  Tsuyoshi Umehara ,  Yosuke Antoku

发明人： Shunji Saruki ,  Takumi Uesugi ,  Tsuyoshi Umehara ,  Yosuke Antoku

IPC分类号： G11B5/33 ,  G11B5/127 ,  G01R33/12

CPC分类号： G01R33/1207 ,  B82Y10/00 ,  B82Y25/00 ,  G01R33/093 ,  G11B5/3906 ,  G11B5/3909 ,  G11B5/455

摘要： A testing method of a thin-film magnetic head has an MR read head element with a multi-layered structure including a magnetization-fixed layer, a magnetization-free layer and a nonmagnetic intermediate layer or a tunnel barrier layer sandwiched between the magnetization-fixed layer and the magnetization-free layer. The method includes a step of feeding through the MR read head element a sense current, a step of measuring non-signal output versus frequency characteristics of the MR read head element over a frequency range that covers at least FMR of the magnetization-fixed layer, and a step of discriminating whether the thin-film magnetic head is a head providing high-temperature noises by comparing a frequency of a peak of the non-signal output resulting from FMR of the magnetization-fixed layer with a threshold.

摘要翻译： 薄膜磁头的测试方法具有具有包括磁化固定层，无磁化层和非磁性中间层的多层结构的MR读取头元件或夹在磁化固定的磁化固定层之间的隧道势垒层 层和无磁化层。 该方法包括通过MR读取头元件馈送感测电流的步骤，在覆盖磁化固定层的至少FMR的频率范围上测量MR读取头元件的非信号输出与频率特性的步骤， 以及通过将由磁化固定层的FMR产生的非信号输出的峰值的频率与阈值进行比较来鉴别薄膜磁头是否是提供高温噪声的磁头的步骤。

公开(公告)号：US07352524B2

公开(公告)日：2008-04-01

申请号：US11269604

申请日：2005-11-09

申请人： Hiroshi Kiyono ,  Yosuke Antoku

发明人： Hiroshi Kiyono ,  Yosuke Antoku

IPC分类号： G11B21/02

CPC分类号： G11B5/6064 ,  G11B5/6005

摘要： A magnetic disk drive comprises a recording medium, a slider, and an alignment device for aligning the slider with respect to the medium. No film made of liquid lubricant is disposed on the surface of the medium. The slider incorporates: a slider main body including a thin-film magnetic head element disposed near a medium facing surface; and a protection film made of a tetrahedral amorphous carbon film for protecting the medium facing surface. The alignment device makes the slider retreat from the surface of the medium when the medium is stopped, and makes the slider face toward the surface of the medium when the medium is rotated. The magnetic disk drive further comprises a distance control device for controlling the distance between the medium and the thin-film magnetic head element.

摘要翻译： 磁盘驱动器包括记录介质，滑块和用于使滑块相对于介质对准的对准装置。 在介质的表面上不设置由液体润滑剂制成的膜。 滑块包括：滑块主体，其包括设置在面向介质的表面附近的薄膜磁头元件; 以及由用于保护面向介质的表面的四面体非晶碳膜制成的保护膜。 当介质停止时，对准装置使滑块从介质的表面退回，并且当介质旋转时使滑块面向介质的表面。 磁盘驱动器还包括用于控制介质和薄膜磁头元件之间的距离的距离控制装置。

公开(公告)号：US08199431B2

公开(公告)日：2012-06-12

申请号：US12756640

申请日：2010-04-08

申请人： Takayasu Kanaya ,  Yosuke Antoku ,  Kazuki Sato ,  Takayuki Nishizawa ,  Kosuke Tanaka ,  Masaru Iida ,  Kazumi Nakatogawa ,  Eric Cheuk Wing Leung ,  Man Tse

发明人： Takayasu Kanaya ,  Yosuke Antoku ,  Kazuki Sato ,  Takayuki Nishizawa ,  Kosuke Tanaka ,  Masaru Iida ,  Kazumi Nakatogawa ,  Eric Cheuk Wing Leung ,  Man Tse

IPC分类号： G11B21/21

CPC分类号： G11B5/1278 ,  G11B5/3136 ,  G11B5/3967 ,  G11B5/6005 ,  G11B5/6064

摘要： A magnetic head disposed in a slider, that is arranged at an interval from a magnetic disk includes a sensor disposed in a position that is opposed to the magnetic disk, a heat conductive film that is positioned on an air bearing surface opposed to the magnetic disk, and that is formed so as to overlap the sensor, of which a height in a direction perpendicular to the air bearing surface is more than a height of the sensor, and that transfers a temperature change of the air bearing surface to the sensor, and a pair of lead films electrically connected to the sensor and not electrically connected to the heat conductive film.

摘要翻译： 设置在与磁盘间隔设置的滑块中的磁头包括设置在与磁盘相对的位置的传感器，位于与磁盘相对的空气轴承表面上的导热膜 并且形成为与传感器重叠，传感器的垂直于空气轴承表面的方向的高度大于传感器的高度，并且将空气轴承表面的温度变化传递到传感器，并且 电连接到传感器并且未电连接到导热膜的一对引线膜。

公开(公告)号：US07990137B2

公开(公告)日：2011-08-02

申请号：US12385054

申请日：2009-03-30

申请人： Yosuke Antoku

发明人： Yosuke Antoku

IPC分类号： G01R33/12

CPC分类号： G11B5/3909 ,  B82Y10/00 ,  B82Y25/00 ,  G11B5/3932 ,  G11B5/455 ,  G11B2005/3996

摘要： An MR element having a magnetically free layer and a magnetic bias layer that applies a bias magnetic field to the magnetically free layer are included. Furthermore, a measuring section that measures a ferromagnetic resonance frequency f0 of the magnetically free layer under a condition of applying a predetermined external magnetic field Hm to the magnetically free layer, and an operation section that computes the bias magnetic field Hb according to a following conditional expression (1): Hb={(2*π*f0/γ)2/Ms}−(Hk+Hm)  (1) where γ is a gyroscope constant, Ms is a saturation magnetic field of the magnetically free layer, and Hk is a shape anisotropy magnetic field of the magnetically free layer.

摘要翻译： 包括具有磁性层的MR元件和向无磁性层施加偏置磁场的磁偏置层。 另外，在向磁性层施加规定的外部磁场Hm的条件下测定无磁性层的铁磁共振频率f0的测定部，以及根据以下条件计算偏置磁场Hb的运算部 表达式（1）：Hb = {（2 *＆pgr; * f0 /γ）2 / Ms} - （Hk + Hm）（1）其中γ是陀螺常数，Ms是无磁层的饱和磁场， Hk是磁性层的形状各向异性磁场。