公开(公告)号：US20090059425A1

公开(公告)日：2009-03-05

申请号：US12255306

申请日：2008-10-21

申请人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

发明人： Yoshiaki Kawato ,  Kazuhiro Nakamoto ,  Hiroyuki Hoshiya ,  Yasuyuki Okada ,  Masafumi Mochizuki

IPC分类号： G11B5/33

CPC分类号： G11B5/3906 ,  G11B5/1278

摘要： Thin film perpendicular magnetic head with a narrow main pole capable of a high recording density in excess of 100 gigabits per square inch and generating a high magnetic recording field, while also being modified to suppress remanent magnetic fields occurring immediately after writing operation. A return path is provided for supplying a magnetic flux to the main pole, and an conductive coil for excitation of the main pole and return path. The main pole has a pole width of 200 nanometers or less, and a magnetic multilayer made up of a high saturation flux density layer and low saturation flux density layer. The low saturation flux density layer and the high saturation flux density suppress remanent magnetization and prevent erasing after writing by utilizing a closed magnetic domain structure in the pole.

摘要翻译： 具有超过100吉比特/平方英寸的高记录密度的窄主极的薄膜垂直磁头，并产生高磁记录场，同时还进行修改以抑制在写入操作之后立即发生的剩余磁场。 提供用于向主极提供磁通量的返回路径和用于激励主极和返回路径的导电线圈。 主极的极宽为200nm以下，由高饱和磁通密度层和低饱和磁通密度层构成的磁性层叠体。 低饱和磁通密度层和高饱和磁通密度通过利用磁极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。

公开(公告)号：US07370405B2

公开(公告)日：2008-05-13

申请号：US11079134

申请日：2005-03-15

申请人： Atsuko Kuroda ,  Masafumi Mochizuki

发明人： Atsuko Kuroda ,  Masafumi Mochizuki

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/1278 ,  G11B5/012 ,  G11B5/187 ,  G11B5/4886 ,  G11B2005/0029 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A thin film magnetic head for perpendicular recording of a single-pole type has a flux enhanced part and a flux enhanced end arranged on a leading side of the main pole in parallel with the cross track direction. The side surface of the main pole intersecting the cross track direction is arranged on the track center side perpendicular to the track width. The field gradient of a perpendicular magnetic field on the trailing side of the main pole and near both ends of the track is made steep to realize a higher areal recording density. The head is fabricated by forming a first resist pattern on an inorganic insulating layer. A slope is formed on the inorganic insulating layer with the resist pattern as a mask. A second resist pattern is then formed on the inorganic insulating layer to form a magnetic layer on the inorganic insulating layer.

摘要翻译： 用于单极型垂直记录的薄膜磁头具有磁通增强部分和磁通增强端，该磁通增强部分与主磁极的前导侧平行于交叉磁道方向布置。 与轨道方向交叉的主极的侧面配置在与轨道宽度垂直的轨道中心侧。 在主极的后侧和轨道两端附近的垂直磁场的场梯度变得陡峭，以实现更高的面积记录密度。 通过在无机绝缘层上形成第一抗蚀剂图案来制造头部。 在抗蚀剂图案作为掩模的无机绝缘层上形成斜面。 然后在无机绝缘层上形成第二抗蚀剂图案，以在无机绝缘层上形成磁性层。

公开(公告)号：US20080007868A1

公开(公告)日：2008-01-10

申请号：US11825254

申请日：2007-07-03

申请人： Yasutaka Nishida ,  Masafumi Mochizuki

发明人： Yasutaka Nishida ,  Masafumi Mochizuki

IPC分类号： G11B5/74

CPC分类号： G11B5/1278 ,  B82Y10/00 ,  G11B5/667 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855

摘要： Embodiments of the present invention provide a perpendicular magnetic recording medium capable of suppressing a magnetic field intensity applied to adjacent tracks on a patterned perpendicular recording medium. According to one embodiment of the present invention, unevenly formed soft under layers are stacked on a flat nonmagnetic substrate, thereby the saturation magnetic flux density of the protruded region is set lower than that of the flat region.

摘要翻译： 本发明的实施例提供一种能够抑制施加到图案化的垂直记录介质上的相邻轨道的磁场强度的垂直磁记录介质。 根据本发明的一个实施例，在平坦的非磁性基板上层叠不均匀的软下层，从而将突出区域的饱和磁通密度设定为低于平坦区域的饱和磁通密度。

公开(公告)号：US20070188921A1

公开(公告)日：2007-08-16

申请号：US11707804

申请日：2007-02-15

申请人： Masafumi Mochizuki ,  Kimitoshi Etoh ,  Yoji Maruyama ,  Hiroshi Fukui

发明人： Masafumi Mochizuki ,  Kimitoshi Etoh ,  Yoji Maruyama ,  Hiroshi Fukui

IPC分类号： G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/3163

摘要： Embodiments in accordance with the present invention provide a magnetic head in which broadening of the effective track width can be decreased without reducing the write-field intensity and a variation of the track width can be decreased. A main pole consists of a pole tip having a part which provides the write track-width and a yoke part recessed from the air beating surface in the element height direction, and the pole tip consists of a pole tip at the trailing side where the width in the track-width direction is large and a pole tip at the leading side where the width in the track width direction is small. Moreover, the throat height of the pole tip at the trailing side is made greater than the throat height of the pole tip at the leading side.

摘要翻译： 根据本发明的实施例提供一种磁头，其中可以在不降低写入场强度的情况下降低有效磁道宽度的扩大，并且可以减小磁道宽度的变化。 主极包括具有提供写入轨道宽度的部分的极尖和在元件高度方向上从空气打浆表面凹陷的轭部，并且极尖由在后侧的极尖组成，其中宽度 在轨道宽度方向上较大，并且在轨道宽度方向上的宽度小的前端的极尖。 此外，使尾端在后侧的喉部高度大于前端的极尖的喉部高度。

公开(公告)号：US07213195B2

公开(公告)日：2007-05-01

申请号：US11339574

申请日：2006-01-26

申请人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hiroyuki Tsuchinaga

发明人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hiroyuki Tsuchinaga

IPC分类号： H03M13/03

CPC分类号： G11B20/10055 ,  G11B5/012 ,  G11B5/09 ,  G11B20/1403 ,  G11B20/18

摘要： In a partial-response maximum-likelihood (PRML) signal detection and processing technique, reduction of data detection error events caused due to medium noise is achieved. For a PRML detection data result obtained after PRML data demodulation, a code error event that depends on a signal distance, and which has a high frequency of occurrence, is noticed and its occurrence probability is estimated. A locally-existing medium noise quantity is estimated from preceding and subsequent code patterns of the PRML detection data result. Based on this, the occurrence probability of the error event is compensated to improve the detection precision. As a result, data modulation with reliability higher than conventional maximum likelihood detection can be realized with a simple circuit structure.

摘要翻译： 在部分响应最大似然（PRML）信号检测和处理技术中，实现了由于中等噪声引起的数据检测误差事件的减少。 对于在PRML数据解调之后获得的PRML检测数据结果，注意到取决于信号距离并且具有高频率出现的代码错误事件，并且估计其发生概率。 根据PRML检测数据结果的前后代码模式估计本地存在的中等噪声量。 基于此，对误差事件的发生概率进行补偿，提高检测精度。 结果，可以通过简单的电路结构实现具有高于常规最大似然检测的可靠性的数据调制。

公开(公告)号：US20060221497A1

公开(公告)日：2006-10-05

申请号：US11389216

申请日：2006-03-24

申请人： Tomohiro Okada ,  Masafumi Mochizuki ,  Hisashi Kimura ,  Wataru Kimura

发明人： Tomohiro Okada ,  Masafumi Mochizuki ,  Hisashi Kimura ,  Wataru Kimura

IPC分类号： G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/315

摘要： Embodiments of the invention provide a perpendicular magnetic recording head that causes the difference between a physical track width and an effective track width to be small. Sides of a main pole are made concave with the concave vertex on each side located close to a trailing edge of the main pole.

摘要翻译： 本发明的实施例提供一种使物理轨道宽度和有效轨道宽度之间的差小的垂直磁记录头。 主极的侧面被制成凹面，每个侧面上的凹顶点靠近主极的后缘。

公开(公告)号：US20060198050A1

公开(公告)日：2006-09-07

申请号：US11370504

申请日：2006-03-07

申请人： Masafumi Mochizuki ,  Isao Nunokawa

发明人： Masafumi Mochizuki ,  Isao Nunokawa

IPC分类号： G11B5/147 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3163 ,  Y10T29/49032

摘要： Embodiments of the invention provide an easy-to-fabricate magnetic head which can generate a high magnetic field without eliminating adjacent tracks even if a skew angle is created. In one embodiment, a structure which comprises a pole tip of main pole exposed on the air bearing surface, a part which is recessed from the air baring surface and having a tapered face at leading side against the air bearing surface, and a magnetic material connected thereto is adopted for the main pole.

摘要翻译： 本发明的实施例提供了一种易于制造的磁头，即使产生偏斜角，也可以产生高磁场而不消除相邻轨迹。 在一个实施例中，一种结构，其包括暴露在空气轴承表面上的主极的极尖部分，一部分从空气悬垂表面凹陷并且在前方抵靠空气轴承表面具有锥形面，并且连接有磁性材料 主杆采用。

公开(公告)号：US20060119984A1

公开(公告)日：2006-06-08

申请号：US11292575

申请日：2005-12-02

申请人： Yasutaka Nishida ,  Ikuya Tagawa ,  Masafumi Mochizuki ,  Roger Wood

发明人： Yasutaka Nishida ,  Ikuya Tagawa ,  Masafumi Mochizuki ,  Roger Wood

IPC分类号： G11B5/41

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

摘要： Embodiments of the invention avoid erasure of recorded data by concentrating stray fields on a magnetic head element. According to one embodiment, in a magnetic storage apparatus using a perpendicular recording medium with a soft magnetic under layer, a soft magnetic shield is provided so as to surround the upper parts and sides of magnetic head elements. A distance between the soft magnetic shield and the medium is shorter than that between the soft magnetic shield and the magnetic head element.

摘要翻译： 本发明的实施例通过将杂散场集中在磁头元件上来避免记录数据的擦除。 根据一个实施例，在使用具有软磁下层的垂直记录介质的磁存储装置中，设置软磁屏蔽以包围磁头元件的上部和侧部。 软磁屏蔽和介质之间的距离比软磁屏蔽和磁头元件之间的距离短。

公开(公告)号：US20060092575A1

公开(公告)日：2006-05-04

申请号：US10976720

申请日：2004-10-29

申请人： Masafumi Mochizuki ,  Kaori Suzuki ,  Kimitoshi Etoh

发明人： Masafumi Mochizuki ,  Kaori Suzuki ,  Kimitoshi Etoh

IPC分类号： G11B5/33 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/265 ,  G11B5/312 ,  G11B5/3143 ,  G11B5/3967

摘要： Embodiments of the invention provide a magnetic head which assures an improved format efficiency without increase in the magnetic field intensity applied at a read element. In one embodiment, a magnetic head incorporates a write head having a main pole and an auxiliary pole, and a read head having a read element between reader shields. An auxiliary shield as a magnetic body is provided between the main pole and reader shields or on the opposite side of the main pole with the reader shields between the main pole and the auxiliary shield.

摘要翻译： 本发明的实施例提供了一种磁头，其确保了在读取元件处施加的磁场强度的增加而不会增加格式效率。 在一个实施例中，磁头包括具有主极和辅助极的写入头，以及在读取器屏蔽之间具有读取元件的读取头。 在主极和读取器屏蔽之间或主极的相对侧上设置有作为磁体的辅助屏蔽，读取器屏蔽在主极和辅助屏蔽之间。

公开(公告)号：US20060087765A1

公开(公告)日：2006-04-27

申请号：US11258468

申请日：2005-10-24

申请人： Tadayuki Iwakura ,  Youji Maruyama ,  Masafumi Mochizuki ,  Ichiro Ohdake

发明人： Tadayuki Iwakura ,  Youji Maruyama ,  Masafumi Mochizuki ,  Ichiro Ohdake

IPC分类号： G11B5/127

CPC分类号： G11B5/3136 ,  G11B5/1278 ,  G11B5/3106

摘要： Embodiments of the invention provide a perpendicular recording magnetic head capable of reducing leakage magnetic fields from the soft magnetic films on the air bearing surface side and reducing the protrusion of the soft magnetic films in the direction of the air bearing surface side due to thermal deformation of the soft magnetic films. In one embodiment, the write functional section includes a coil conductor, second soft magnetic film pattern and first soft magnetic film pattern that cover the coil conductor from top and bottom and are magnetically coupled to each other, and a main magnetic pole piece determining a track width. The read functional section includes a reading element sandwiched between two magnetic shield films. A pedestal magnetic pole pattern is formed at the frontal end position of the first soft magnetic film pattern.

摘要翻译： 本发明的实施例提供一种垂直记录磁头，其能够减少来自空气轴承面侧的软磁性膜的泄漏磁场，并且由于热变形而减小软磁性膜在空气轴承面侧的方向上的突出 软磁膜。 在一个实施例中，写功能部分包括线圈导体，第二软磁膜图案和第一软磁膜图案，其从顶部和底部覆盖线圈导体并且彼此磁耦合;以及主磁极片，其确定轨道 宽度。 读取功能部分包括夹在两个磁屏蔽膜之间的读取元件。 在第一软磁膜图案的前端位置处形成基座磁极图案。