公开(公告)号：US08064164B2

公开(公告)日：2011-11-22

申请号：US12124217

申请日：2008-05-21

申请人： Tomohiro Yamashita ,  Hiroshi Kameda ,  Katsuhiko Otomo

发明人： Tomohiro Yamashita ,  Hiroshi Kameda ,  Katsuhiko Otomo

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3123 ,  G11B5/3133

摘要： In a perpendicular magnetic recording head comprising a main magnetic pole layer and a return yoke layer which have respective front end faces exposed at a surface opposing a recording medium and are laminated with a nonmagnetic material layer interposed therebetween on the medium-opposing surface, an end magnetization control layer for generating an exchange-coupling field is provided on the upper or lower side of both end parts in a track width direction of the return yoke layer. The exchange-coupling field fixes magnetization in the end parts to the track width direction.

摘要翻译： 在包括主磁极层和返回磁轭层的垂直磁记录头中，其具有在与记录介质相对的表面处暴露的相应的前端面，并且在介质相对表面上层叠有非磁性材料层， 用于产生交换耦合场的磁化控制层设置在返回磁轭层的轨道宽度方向上的两个端部的上侧或下侧。 交换耦合场将端部中的磁化固定到轨道宽度方向。

公开(公告)号：US08085184B2

公开(公告)日：2011-12-27

申请号：US12421926

申请日：2009-04-10

申请人： Yuuki Takabayashi ,  Hiroshi Kameda

发明人： Yuuki Takabayashi ,  Hiroshi Kameda

IPC分类号： G01S13/00 ,  G01S13/08 ,  G01S13/58

CPC分类号： G01S13/931 ,  G01S13/343 ,  G01S13/584 ,  G01S2013/9325

摘要： According to a conventional method of correlating beat frequencies in a radar device, a detecting state of a target differs at the time of up-chirping and at that of down-chirping, so that, when the number of peaks of beat frequencies does not match with each other, there occurs a situation in which the beat frequencies cannot be accurately correlated.The radar device herein provided includes a transmission unit for transmitting a frequency-modulated continuous wave (FMCW) signal; a reception unit for generating a beat signal from the transmission signal and a reception signal corresponding thereto; a beat-frequency generating unit for obtaining a beat-frequency distribution corresponding to the beat signal; an up-chirp beat-frequency tracking means and a down-chirp beat-frequency tracking means for performing tracking processing on a beat signal; and an up-chirp target-detection means and a down-chirp target-detection means for calculating a range and range-change rate to a target based on a beat signal's frequency distribution.

摘要翻译： 根据雷达装置中的拍频相关的常规方法，目标的检测状态在向上啁啾时和在下啁啾时的检测状态不同，使得当拍频的峰值数不匹配时 彼此发生拍频不能被精确相关的情况。 本文提供的雷达装置包括用于发送调频连续波（FMCW）信号的发送单元; 接收单元，用于从所述发送信号产生拍频信号和与其对应的接收信号; 拍频产生单元，用于获得对应于拍子信号的拍频分布; 用于对拍子信号进行跟踪处理的向上啁啾拍频跟踪装置和下啁啾拍频调频装置; 以及向上啁啾目标检测装置和下行啁啾目标检测装置，用于基于拍子信号的频率分布来计算对目标的范围和范围变化率。

公开(公告)号：US07990654B2

公开(公告)日：2011-08-02

申请号：US12038294

申请日：2008-02-27

申请人： Hisayuki Yazawa ,  Takahiro Taoka ,  Hiroshi Kameda

发明人： Hisayuki Yazawa ,  Takahiro Taoka ,  Hiroshi Kameda

IPC分类号： G11B5/31

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A perpendicular magnetic recording head includes a main magnetic pole layer and an auxiliary yoke layer that overlaps the main magnetic pole layer as viewed in a top view and is magnetically coupled to the main magnetic pole layer. The main magnetic pole layer includes a pole straight part exposed to an opposing surface opposite a recording medium, and a flared part that extends from the pole straight part in a height direction, the flared part broadening in a track width direction as the flared part extends in the height direction. The auxiliary yoke layer includes a flared part that extends from the recording medium-opposing surface, the flared part broadening in the track width direction as the flared part extends in the height direction. The flared part of the auxiliary yoke layer is disposed at a position located closer to the rear side in the height direction than the flared part of the main magnetic pole layer. The flared part of the main magnetic pole layer is formed at a flare angle greater than a flare angle of the auxiliary yoke layer.

摘要翻译： 垂直磁记录头包括主磁极层和与主磁极层重叠的辅助磁轭层，如顶视图所示，并且磁耦合到主磁极层。 主磁极层包括暴露于与记录介质相对的相对表面的极直部分，以及在高度方向上从极直部分延伸的扩张部分，当扩张部延伸时，扩张部分在轨道宽度方向上变宽 在高度方向。 辅助轭层包括从记录介质相对表面延伸的扩张部分，当扩张部分在高度方向上延伸时，扩张部分在轨道宽度方向上变宽。 辅助磁轭层的扩口部分位于比主磁极层的扩张部分更靠近高度方向后侧的位置。 主磁极层的扩口部形成为大于辅助磁轭层的扩口角的喇叭角。

公开(公告)号：US07852603B2

公开(公告)日：2010-12-14

申请号：US11676113

申请日：2007-02-16

申请人： Kiyoshi Kobayashi ,  Hiroshi Kameda

发明人： Kiyoshi Kobayashi ,  Hiroshi Kameda

IPC分类号： G11B5/187

CPC分类号： G11B5/3116 ,  G11B5/1278

摘要： A perpendicular magnetic recording head is provided. The perpendicular magnetic recording head includes a main magnetic pole layer overlapped with a sub-yoke layer. The sub-yoke layer having a multiple-magnetic domain includes a magnetic domain having dominant track-widthwise component in contact with a front end face of the sub-yoke layer. A main magnetic pole layer 24 is overlapped with the magnetic domain 35b and is affected by the magnetic domain 35b.

摘要翻译： 提供垂直磁记录头。 垂直磁记录头包括与副轭铁层重叠的主磁极层。 具有多磁畴的子轭层包括具有与副轭铁层的前端面接触的主导轨宽分量的磁畴。 主磁极层24与磁畴35b重叠，受磁畴35b的影响。

公开(公告)号：US20100176000A1

公开(公告)日：2010-07-15

申请号：US12440260

申请日：2007-09-07

申请人： Toshio Inbe ,  Hiroshi Kameda ,  Masanobu Futsuhara ,  Kazuto Akiyama

发明人： Toshio Inbe ,  Hiroshi Kameda ,  Masanobu Futsuhara ,  Kazuto Akiyama

IPC分类号： B32B15/04 ,  C25D5/34

CPC分类号： C23C22/34 ,  C08G73/0246 ,  C08L63/00 ,  C08L79/02 ,  C09D5/443 ,  C23C22/83 ,  C23C28/00 ,  C23C2222/20 ,  C25D9/10 ,  C25D13/02 ,  C25D13/22 ,  C08L2666/22

摘要： A method of treating the surface of a metal base which is conducted prior to cationic electrodeposition coating and is used for improving throwing power in the cationic electrodeposition coating; a metallic material treated by the surface treatment method; and a method of coating this metallic material.

摘要翻译： 一种处理在阳离子电沉积涂覆之前进行的金属基体表面的方法，用于改善阳离子电沉积涂层中的投射功率; 通过表面处理方法处理的金属材料; 以及涂覆该金属材料的方法。

公开(公告)号：US07545603B2

公开(公告)日：2009-06-09

申请号：US11115621

申请日：2005-04-27

申请人： Hiroshi Kameda ,  Eiji Ozaki

发明人： Hiroshi Kameda ,  Eiji Ozaki

IPC分类号： G11B5/127 ,  G11B5/31

CPC分类号： G11B5/265

摘要： A magnetic head and a manufacturing method thereof which can suppress side fringing and permeation of a recording magnetic field in the first direction while maintaining the intensity of a recording magnetic field. By making a length of a trailing upper surface of a front portion in a height direction longer than a length of a leading lower surface of the front portion in the height direction, a generated magnetic field of the trailing upper surface can be comparatively weakened, to suppress side fringing and magnetic field permeation of a recording magnetic field. The recording magnetic field can be kept large enough by shortening the length of the leading lower surface in the height direction to intensify a generated magnetic field generated from the leading side.

摘要翻译： 一种磁头及其制造方法，其能够在保持记录磁场的强度的同时抑制记录磁场在第一方向上的侧边缘和渗透。 通过使高度方向上的前部的后部上表面的长度比前部的前部下表面的高度方向的长度长，可以相对削弱后方上表面的产生的磁场， 抑制记录磁场的侧边缘和磁场渗透。 记录磁场可以通过缩小前导下表面在高度方向上的长度来保持足够大，从而增强从前端产生的产生的磁场。

公开(公告)号：US20080174911A1

公开(公告)日：2008-07-24

申请号：US11943938

申请日：2007-11-21

申请人： Yusuke Toma ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Hiroshi Kameda

发明人： Yusuke Toma ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Hiroshi Kameda

IPC分类号： G11B5/127 ,  G11B5/31

CPC分类号： G11B5/1278 ,  G11B5/3116

摘要： A perpendicular magnetic recording head is provided capable of suppressing the magnetic field attributable to the edge write phenomenon and improving resistance to an external magnetic field. The perpendicular magnetic recording head includes a magnetic layer that has a main magnetic pole on a surface facing a recording medium; a return yoke layer that is disposed on the magnetic layer with a nonmagnetic layer disposed therebetween and has a large width in the direction of the main magnetic pole; and a coil layer for applying a recording magnetic field to the magnetic layer. The return yoke layer is provided with such a shape that as seen in the plan view, the return yoke layer is exposed from the medium facing surface with a width not greater than the width in the track width direction of a protrusion region of the return yoke layer that covers the coil layer and the width of the return yoke layer gradually increases as it goes toward the starting point of the height direction.

摘要翻译： 提供了能够抑制归因于边缘写入现象的磁场并提高对外部磁场的抵抗力的垂直磁记录头。 垂直磁记录头包括在面向记录介质的表面上具有主磁极的磁性层; 返回磁轭层，其设置在磁性层上，其间设置有非磁性层，并且在主磁极的方向上具有大的宽度; 以及用于向磁性层施加记录磁场的线圈层。 返回磁轭层具有如下的形状：从平面图看，返回磁轭层从介质面向表面露出，宽度不大于返回磁轭的突出区域的磁道宽度方向上的宽度 覆盖线圈层的层和返回轭层的宽度随着朝向高度方向的起点逐渐增加。

公开(公告)号：US20070041127A1

公开(公告)日：2007-02-22

申请号：US11460922

申请日：2006-07-28

申请人： Hiroshi Kameda ,  Hisayuki Yazawa

发明人： Hiroshi Kameda ,  Hisayuki Yazawa

IPC分类号： G11B5/147

CPC分类号： G11B5/1278

摘要： A perpendicular magnetic recording head includes a main pole layer and a return path layer that are exposed from a medium-facing surface of the recording head facing a recording medium and that face each other with a predetermined gap therebetween at the medium-facing surface. A coil layer applies a recording magnetic field to the main pole layer and the return path layer. The return path layer includes a gap adjusting layer and a main layer stacked in that order from a side facing the main pole layer. The gap adjusting layer is positioned so as to face the main pole layer and the recording medium, and is made of a magnetic material having a resistivity lower than resistivities of the main layer and the main pole layer.

摘要翻译： 垂直磁记录头包括从面向记录介质的记录头的面向中间的表面露出的主极层和返回路径层，并且在面向介质的表面上以预定的间隙彼此面对。 线圈层向主极层和返回路径层施加记录磁场。 返回路径层包括从面向主极层的一侧依次层叠的间隙调整层和主层。 间隙调整层被定位为面对主极层和记录介质，并且由具有比主层和主极层的电阻率低的电阻率的磁性材料制成。

公开(公告)号：US20060164756A1

公开(公告)日：2006-07-27

申请号：US11336250

申请日：2006-01-20

申请人： Hiroshi Kameda ,  Kiyoshi Kobayashi

发明人： Hiroshi Kameda ,  Kiyoshi Kobayashi

IPC分类号： G11B5/127

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B5/3116

摘要： An auxiliary magnetic section has a multilayer structure consisting of auxiliary magnetic layers and a non-magnetic layer and a first auxiliary magnetic layer is bonded to a main magnetic pole layer. This allows the auxiliary magnetic layers to have large induced magnetic anisotropy due to antiferromagnetic coupling in a track width direction. Since the first auxiliary magnetic layer is ferromagnetically coupled with the main magnetic pole layer, the magnetization of the main magnetic pole layer can be more properly directed in the track width direction as compared to known main magnetic pole layers and has low remanence. This leads to an increase in magnetic recording efficiency.

摘要翻译： 辅助磁区具有由辅助磁性层和非磁性层构成的多层结构，第一辅助磁性层与主磁极层接合。 这允许辅助磁性层由于在磁道宽度方向上的反铁磁耦合而具有大的感应磁各向异性。 由于第一辅助磁性层与主磁极层铁磁耦合，所以与已知的主磁极层相比，主磁极层的磁化能够更加适合于轨道宽度方向，并且具有低剩磁。 这导致磁记录效率的提高。

公开(公告)号：US20050259357A1

公开(公告)日：2005-11-24

申请号：US11127904

申请日：2005-05-12

申请人： Hiroshi Kameda

发明人： Hiroshi Kameda

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/31

CPC分类号： G11B5/3146 ,  G11B5/1278 ,  G11B5/3116

摘要： A perpendicular magnetic recording head includes a first magnetic portion, a second magnetic portion formed with a gap from the first magnetic portion, and a coil layer located in the gap between the first magnetic portion and the second magnetic portion for applying a recording magnetic field to the first magnetic field and the second magnetic field. The yoke layer is formed on the second magnetic portion, a width whose direction is orthogonal to the height direction of a front end of the yoke layer becomes larger gradually or continuously as going in the height direction, and the width becomes larger gradually or continuously as going farther from the second magnetic portion.

摘要翻译： 垂直磁记录头包括第一磁性部分，形成有来自第一磁性部分的间隙的第二磁性部分和位于第一磁性部分和第二磁性部分之间的间隙中的线圈层，用于将记录磁场施加到 第一磁场和第二磁场。 磁轭层形成在第二磁性部分上，与磁轭层的前端的高度方向正交的宽度在高度方向上逐渐或连续变大，并且宽度逐渐或连续变大或逐渐变大，如 远离第二磁性部分。