公开(公告)号：US08018680B2

公开(公告)日：2011-09-13

申请号：US11947148

申请日：2007-11-29

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

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

IPC分类号： G11B5/147 ,  G11B5/39

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  Y10T428/11

摘要： A vertical magnetic recording head device includes: a magnetic layer that includes a main magnetic pole exposed from a surface facing a recording medium; a return yoke layer that is provided on the magnetic layer with a non-magnetic layer interposed therebetween; and coil layers that apply a recording magnetic field to the magnetic layer and the return yoke layer. In the vertical magnetic recording head device, the return yoke layer includes thick portions that extend in a height direction in edge regions arranged in a track width direction.

摘要翻译： 垂直磁记录头装置包括：磁性层，其包括从面向记录介质的表面暴露的主磁极; 在磁性层上设置有介于其间的非磁性层的返回磁轭层; 以及向磁性层和返回轭层施加记录磁场的线圈层。 在垂直磁记录头装置中，返回磁轭层包括沿轨道宽度方向布置的边缘区域沿高度方向延伸的厚壁部分。

公开(公告)号：US20080152951A1

公开(公告)日：2008-06-26

申请号：US11947148

申请日：2007-11-29

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

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

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  Y10T428/11

摘要： A vertical magnetic recording head device includes: a magnetic layer that includes a main magnetic pole exposed from a surface facing a recording medium; a return yoke layer that is provided on the magnetic layer with a non-magnetic layer interposed therebetween; and coil layers that apply a recording magnetic field to the magnetic layer and the return yoke layer. In the vertical magnetic recording head device, the return yoke layer includes thick portions that extend in a height direction in edge regions arranged in a track width direction

摘要翻译： 垂直磁记录头装置包括：磁性层，其包括从面向记录介质的表面暴露的主磁极; 在磁性层上设置有介于其间的非磁性层的返回磁轭层; 以及向磁性层和返回轭层施加记录磁场的线圈层。 在垂直磁记录头装置中，返回磁轭层包括沿轨道宽度方向布置的边缘区域沿高度方向延伸的厚壁部分

公开(公告)号：US20080019043A1

公开(公告)日：2008-01-24

申请号：US11780608

申请日：2007-07-20

申请人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita

发明人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita

IPC分类号： G11B5/127

CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B5/3912 ,  G11B5/3967

摘要： A perpendicular magnetic recording head according to the present invention is composed of a first magnetic layer having a main magnetic pole exposed at a facing surface opposite a recording medium, a second magnetic layer adjacent to the first magnetic layer with an intermediary non-magnetic layer disposed therebetween, and a coil layer for applying a recording magnetic field to the first magnetic layer. Since the second magnetic layer has a shape including a substantially arched portion in its cross section along a height direction, it becomes possible to keep an Edge Write magnetic field in a low level and improve external magnetic field resistance.

摘要翻译： 根据本发明的垂直磁记录头由具有在与记录介质相对的相对表面暴露的主磁极的第一磁性层组成，与第一磁性层相邻的第二磁性层，其中设置有中间非磁性层 以及用于向第一磁性层施加记录磁场的线圈层。 由于第二磁性层具有沿其高度方向的横截面中包括大致拱形部分的形状，因此可以将边缘写入磁场保持在低电平并提高外部磁场电阻。

公开(公告)号：US07436628B2

公开(公告)日：2008-10-14

申请号：US11092205

申请日：2005-03-29

申请人： Hiroshi Kameda ,  Kiyoshi Kobayashi

发明人： Hiroshi Kameda ,  Kiyoshi Kobayashi

IPC分类号： G11B5/187 ,  G11B5/147

CPC分类号： G11B5/1278

摘要： A concave portion is formed on the end surface of a main magnet pole layer on the trailing side. A convex portion is formed on the end surface of a return yoke layer on the leading side, which opposes the concave portion formed on the end surface of the main magnet pole layer on the trailing side, and the distance (gap length) between the main magnet pole layer and the return yoke layer in the direction of the film thickness is constant. Consequently, the magnetic field generating from the main magnet pole layer toward the recording medium is appropriately prevented from isotropically spreading in the trailing direction, and the width of magnetization reversal between the recording patterns, which are magnetized reversely from each other, can be reduced over the entire area.

摘要翻译： 在后侧的主磁极层的端面上形成有凹部。 在前侧的返回轭铁层的与后侧的主磁极层的端面上形成的凹部相对的返回轭层的端面上形成有凸部，主体的主体磁极层之间的距离（间隙长度） 磁极层和返回磁轭层在膜厚度方向上是恒定的。 因此，适当地防止从主磁极层朝向记录介质产生的磁场在向后方向上各向同性地扩展，并且可以减少彼此反向磁化的记录图案之间的磁化反转宽度 整个地区。

公开(公告)号：US20080019042A1

公开(公告)日：2008-01-24

申请号：US11780600

申请日：2007-07-20

申请人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita ,  Toshinori Watanabe

发明人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita ,  Toshinori Watanabe

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3123 ,  G11B5/3136 ,  G11B5/3912 ,  G11B5/3967

摘要： A perpendicular magnetic recording head includes a first magnetic layer having a main magnetic pole exposed at a medium-facing surface that faces a recording medium; a second magnetic layer that faces the first magnetic layer with a nonmagnetic layer interposed therebetween; and a coil layer for applying a recording magnetic field to the first magnetic layer. The second magnetic layer includes a relatively thick edge portion, whereby the edge-write magnetic field is reduced and the external magnetic field resistance is increased.

摘要翻译： 垂直磁记录头包括：第一磁性层，其具有在面向记录介质的面向中间的表面处暴露的主磁极; 面向第一磁性层的第二磁性层，介于其间的非磁性层; 以及用于向第一磁性层施加记录磁场的线圈层。 第二磁性层包括相对较厚的边缘部分，由此边缘写入磁场减小并且外部磁场电阻增加。

公开(公告)号：US20070195455A1

公开(公告)日：2007-08-23

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： G11B5/147

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，并受到磁畴35b的影响。

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：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：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：US08054578B2

公开(公告)日：2011-11-08

申请号：US12112494

申请日：2008-04-30

申请人： Hiroshi Kameda ,  Kiyoshi Kobayashi

发明人： Hiroshi Kameda ,  Kiyoshi Kobayashi

IPC分类号： G11B5/31 ,  G11B5/11 ,  G11B5/23

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/23 ,  G11B5/3146 ,  G11B5/315

摘要： A perpendicular magnetic recording head includes a main magnetic pole layer and a return yoke layer which are laminated with a magnetic gap layer interposed therebetween on a medium-opposing surface, and a pair of side shield layers positioned on both sides in the track width direction of the main magnetic pole layer while interposing a nonmagnetic material layer therebetween. The magnetic gap layer is constituted by a first gap layer formed in a partial area in the track width direction bridging the main magnetic pole layer and the pair of side shield layers, and a second gap layer thinner than the first gap layer and interposed between the return yoke layer and the pair of side shield layers in a remaining area where the first gap layer is absent.

摘要翻译： 垂直磁记录头包括在中间相对表面上层叠有间隙层的主磁极层和返回磁轭层，以及位于磁道宽度方向两侧的一对侧屏蔽层 主磁极层，同时在其间插入非磁性材料层。 磁隙层由形成在桥接主磁极层和一对侧屏蔽层的磁道宽度方向的局部区域中的第一间隙层和比第一间隙层更薄的第二间隙层构成， 在第一间隙层不存在的剩余区域中的返回轭层和一对侧屏蔽层。