公开(公告)号：US07221538B2

公开(公告)日：2007-05-22

申请号：US10644022

申请日：2003-08-20

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： G11B5/147 ,  G11B5/39

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 exceeding 10 kOe while suppressing remanent magnetic fields occurring immediately after write operations. The perpendicular magnetic head comprises a main pole, a return path for supplying a magnetic flux to that main pole, and a 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 has a thickness within 0.5 to 5 nanometers, and The high saturation flux density layer has a thickness from 10 to 50.

摘要翻译： 具有能够记录密度高达100吉比特/平方英寸的窄主磁极的薄膜垂直磁头，并且在写入操作之后立即产生高磁记录场超过10kOe，同时抑制残留的磁场。 垂直磁头包括主极，用于向该主极提供磁通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。 低饱和磁通密度层的厚度为0.5〜5纳米，高饱和磁通密度层的厚度为10〜50。

公开(公告)号：US20060156208A1

公开(公告)日：2006-07-13

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：US20060002018A1

公开(公告)日：2006-01-05

申请号：US11173730

申请日：2005-06-30

申请人： Hiroshi Fukui ,  Masafumi Mochizuki ,  Kaori Suzuki

发明人： Hiroshi Fukui ,  Masafumi Mochizuki ,  Kaori Suzuki

IPC分类号： G11B5/127

CPC分类号： G11B5/127

摘要： Embodiments of the invention provide a magnetic head which prevents data on a recording medium from being erased even when a stray field is applied. In one embodiment, an auxiliary pole is sandwiched between a stray-field shield composed of a magnetic layer recessed from the air bearing surface and a main pole. The stray-field shield may be formed on the leading side of the auxiliary pole. A face of the stray-field shield on a medium side may be recessed from an air-bearing-surface of the magnetic head.

摘要翻译： 本发明的实施例提供一种磁头，即使当施加杂散场时也防止记录介质上的数据被擦除。 在一个实施例中，辅助极被夹在由空气支承表面凹入的磁性层和主极之间的杂散场屏蔽之间。 杂散场屏蔽可以形成在辅助极的前导侧。 介质侧的杂散屏蔽层的表面可以从磁头的空气轴承表面凹入。

公开(公告)号：US4384352A

公开(公告)日：1983-05-17

申请号：US301297

申请日：1981-09-11

申请人： Takashi Saito ,  Masafumi Mochizuki ,  Toshio Hirano

发明人： Takashi Saito ,  Masafumi Mochizuki ,  Toshio Hirano

IPC分类号： G11B17/049 ,  G11B17/032 ,  G11B17/04 ,  G11B23/03 ,  G11B3/10

CPC分类号： G11B17/049 ,  G11B17/032 ,  G11B23/0328

摘要： A rotary recording medium reproducing apparatus reproduces a rotary recording medium accommodated within a case where the case comprises a jacket provided with a space for accommodating the rotary recording medium and an opening for allowing the rotary recording medium to go in and out of the jacket, and a lid member inserted through the opening of the jacket for closing the opening of the jacket. The rotary recording medium reproducing apparatus comprises an inserting opening through which the case is inserted, a turntable for rotating the rotary recording medium, a lid member locking mechanism and rotary recording medium clamping mechanism provided at an innermost part of the reproducing apparatus at an opposite side from the inserting opening with respect to the turntable, where the rotary recording medium clamping mechanism consists of an upper clamping member and a lower clamping member which is at a downwardly inclined rotated position upon non-clamping state and at a horizontal rotational position upon clamping state, an operating mechanism pushed and displaced by the case inserted into the reproducing apparatus, for operating the lid member locking mechanism and the rotary recording medium clamping mechanism, a locking mechanism for locking the operating mechanism at a final displaced position, and a restricting mechanism constructed from a part of the lower clamping member of the rotary recording medium clamping mechanism and a part of the operating mechanism, for restricting the displacing movement of the operating mechanism towards the final displaced position at an intermediate position when the lower clamping member is at the downwardly inclined rotated position.

摘要翻译： 旋转记录介质再现装置再现容纳在壳体中的旋转记录介质，其中壳体包括设置有用于容纳旋转记录介质的空间的夹套和允许旋转记录介质进出外壳的开口， 插入穿过护套的开口的盖构件，用于封闭护套的开口。 旋转记录介质再现装置包括插入壳体的插入口，用于旋转旋转记录介质的转台，在相对侧的再现装置的最内部设置的盖构件锁定机构和旋转记录介质夹紧机构 从相对于转盘的插入开口，其中旋转记录介质夹持机构由上夹紧构件和下夹紧构件组成，该夹紧构件和下夹紧构件在非夹紧状态下处于向下倾斜的旋转位置，并且在夹紧状态下处于水平旋转位置 由插入到再现装置中的壳体推动和移动的操作机构，用于操作盖构件锁定机构和旋转记录介质夹紧机构，用于将操作机构锁定在最终位移位置处的锁定机构和构造的限制机构 从下部夹紧件的一部分 旋转记录介质夹紧机构的一部分和操作机构的一部分，用于当下夹持件处于向下倾斜的旋转位置时，在中间位置限制操作机构朝向最终位移位置的移动。

公开(公告)号：US4352174A

公开(公告)日：1982-09-28

申请号：US231868

申请日：1981-02-05

申请人： Osamu Tajima ,  Takashi Yamamura ,  Masafumi Mochizuki ,  Yoichi Mita

发明人： Osamu Tajima ,  Takashi Yamamura ,  Masafumi Mochizuki ,  Yoichi Mita

IPC分类号： G11B17/049 ,  G11B17/032 ,  G11B17/04 ,  G11B23/03 ,  G11B3/00 ,  H04N5/76

CPC分类号： G11B17/049 ,  G11B17/032 ,  G11B17/04 ,  G11B23/0328

摘要： A reproducing apparatus reproduces a disc-shaped recording medium which is accommodated within a case comprising jacket which has a space for accommodating the disc-shaped recording medium and an opening for allowing the disc-shaped recording medium to go in and out of the jacket, and a lid plate inserted through the opening of the jacket for closing the opening of the jacket. The reproducing apparatus comprises an inserting opening through which the case is inserted a lid plate locking mechanism and disc-shaped recording medium clamping mechanism respectively provided at the innermost part of the reproducing apparatus opposite to the inserting opening with respect to a turntable, for rotating the disc-shaped recording medium, and a jacket opening enlarging mechanism provided in the vicinity of the inserting opening, capable of moving over the turntable between the position in the vicinity of the inserting opening and the innermost part of the reproducing apparatus. The jacket opening enlarging mechanism has an enlarging member for enlarging the opening of the jacket by entering inside the cutouts of the lid plate, upon insertion of the jacket into the reproducing apparatus through the inserting opening. The lid plate locking mechanism has a locking member for locking the lid plate by entering inside the cutouts of the lid plate, upon insertion of the lid plate into the innermost part of the reproducing apparatus together with the jacket. The disc-shaped recording medium clamping mechanism has a clamping member for clamping the disc-shaped recording medium within the jacket by riding over the ride-over part of the lid plate and entering through the enlarged opening of the jacket, upon insertion of the lid plate into the innermost part of the reproducing apparatus together with the jacket.

摘要翻译： 再现装置再现一种盘形记录介质，其容纳在具有用于容纳盘形记录介质的空间的外壳的壳体和用于允许盘形记录介质进出外壳的开口， 以及通过所述护套的开口插入以封闭所述护套的开口的盖板。 再现装置包括插入开口，壳体通过其插入盖板锁定机构和分别设置在再现装置的与插入口相对的转盘的最内部的盘形记录介质夹持机构，用于使 盘形记录介质和设置在插入孔附近的护套开口扩大机构，能够在转盘附近在插入口附近的位置和再现装置的最内部之间移动。 护套开口扩大机构具有扩大构件，用于通过插入口将护套插入到再现装置中，通过进入盖板的切口内而扩大护套的开口。 盖板锁定机构具有锁定构件，用于在将盖板与护套一起插入到再现装置的最内部部分中时，通过进入盖板的切口来锁定盖板。 盘形记录介质夹紧机构具有夹紧构件，用于通过在盖板的越过部分上方夹持盘形记录介质，并且在盖子插入时通过盖的扩大开口进入 与夹克一起进入再现装置的最内部。

公开(公告)号：US08792210B2

公开(公告)日：2014-07-29

申请号：US13612704

申请日：2012-09-12

申请人： Anton R. de la Fuente ,  Masafumi Mochizuki ,  James T. Olson ,  Roger W. Wood

发明人： Anton R. de la Fuente ,  Masafumi Mochizuki ,  James T. Olson ,  Roger W. Wood

IPC分类号： G11B5/11 ,  G11B5/31 ,  G11B5/127

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/23 ,  G11B5/3146 ,  G11B5/315

摘要： In one embodiment, a system includes a writer for shingled recording which includes a write pole having a trailing edge and first and second side edges extending from the trailing edge. The writer further includes a shield extending along and about parallel to at least an entire length of the trailing edge, the shield also extending along at least a portion of the first side edge. Other systems are also presented which include advanced shingled writing head designs.

摘要翻译： 在一个实施例中，一种系统包括用于瓦楞记录的写入器，其包括具有后缘的写入极和从后沿延伸的第一和第二侧边缘。 写入器还包括沿着后边缘至少整个长度平行延伸并且围绕其平行的屏蔽件，屏蔽件还沿着第一侧边缘的至少一部分延伸。 还提出了其他系统，其中包括先进的带灰色书写头设计。

公开(公告)号：US08717708B2

公开(公告)日：2014-05-06

申请号：US12315523

申请日：2008-12-03

申请人： Mao Nishiyama ,  Shuji Nishida ,  Hideaki Maeda ,  Masafumi Mochizuki

发明人： Mao Nishiyama ,  Shuji Nishida ,  Hideaki Maeda ,  Masafumi Mochizuki

IPC分类号： G11B5/127

CPC分类号： G11B5/3166 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/315 ,  G11B5/3169 ,  Y10T428/1171 ,  Y10T428/1193

摘要： Embodiments of the present invention provide a magnetic head for perpendicular magnetic recording, and a magnetic disk apparatus capable of preventing data erasure caused by alignment marks. In an embodiment, the magnetic head includes a head element including at least a main pole having a pole face on a flying surface and an auxiliary pole; alignment marks made of a magnetic material and used to detect the amount of lapping work when lapping the pole face of the main pole; and members made of a magnetic material, continuously extending in either direction with respect to the position of the main pole from within the alignment marks outward at least beyond the alignment marks.

摘要翻译： 本发明的实施例提供一种用于垂直磁记录的磁头，以及能够防止由对准标记引起的数据擦除的磁盘装置。 在一个实施例中，磁头包括头元件，头元件至少包括在飞行表面上具有极面的主极和辅助极; 由磁性材料制成的对准标记，用于在研磨主极的极面时检测研磨作业的数量; 以及由磁性材料制成的构件，其在相对于主极的位置的任一方向上从对准标记内部至少超过对准标记向外延伸。

公开(公告)号：US08373940B2

公开(公告)日：2013-02-12

申请号：US12547964

申请日：2009-08-26

申请人： Yohji Maruyama ,  Nobumasa Nishiyama ,  Masafumi Mochizuki

发明人： Yohji Maruyama ,  Nobumasa Nishiyama ,  Masafumi Mochizuki

IPC分类号： G11B5/02 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/314 ,  G11B2005/001

摘要： According to one embodiment, a magnetic head for recording magnetic data by changing the magnetization direction of a magnetic recording layer of a magnetic medium comprises a magnetic pole for generating a magnetic field to change the magnetization direction of the magnetic recording layer, and a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer to assist the change of the magnetization direction of the magnetic recording layer caused by the magnetic field from the magnetic pole. Other embodiments are also presented.

摘要翻译： 根据一个实施例，用于通过改变磁介质的磁记录层的磁化方向来记录磁数据的磁头包括用于产生磁场以改变磁记录层的磁化方向的磁极和面对电极 用于产生电磁场并向磁记录层施加能量以帮助由磁极引起的磁场引起的磁记录层的磁化方向的改变。 还提出了其他实施例。

公开(公告)号：US20130033778A1

公开(公告)日：2013-02-07

申请号：US13196022

申请日：2011-08-02

申请人： Mao Nishiyama ,  Masafumi Mochizuki ,  Kyo Akagi ,  Shuji Nishida ,  Kazunari Usui

发明人： Mao Nishiyama ,  Masafumi Mochizuki ,  Kyo Akagi ,  Shuji Nishida ,  Kazunari Usui

IPC分类号： G11B5/09 ,  G11B21/02 ,  G11B5/82

CPC分类号： G11B5/743 ,  G11B5/59627 ,  G11B5/59661

摘要： In one embodiment, a method includes spiral writing a DC pattern onto a magnetic disk medium using a writer of a magnetic head while moving the magnetic head in a direction about parallel to a radial direction of the magnetic disk medium while rotating the magnetic disk medium, reading the magnetic disk medium while moving the magnetic head in the direction about parallel to the radial direction of the magnetic disk medium while rotating the magnetic disk medium, and calculating a track pitch interval between data tracks of the magnetic disk medium based on the reading of the magnetic disk medium. In another embodiment, a magnetic disk medium includes a DC spiral pattern in a radial region further outward and/or a radial region further inward than a radial region where data is recorded.

摘要翻译： 在一个实施例中，一种方法包括使用磁头的写入器将DC图案螺旋写入到磁盘介质上，同时在旋转磁盘介质的同时在大致平行于磁盘介质的径向的方向上移动磁头， 在旋转磁盘介质的同时沿着与磁盘介质的径向大致平行的方向移动磁头的同时读取磁盘介质，并且基于读取磁盘介质计算磁盘介质的数据磁道之间的磁道间距间隔 磁盘介质。 在另一个实施例中，磁盘介质包括在径向区域中进一步向内和/或径向区域的直流螺旋图案，该径向区域比记录数据的径向区域更内侧。

公开(公告)号：US08107180B2

公开(公告)日：2012-01-31

申请号：US12505085

申请日：2009-07-17

申请人： Shuji Nishida ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideaki Maeda

发明人： Shuji Nishida ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hideaki Maeda

IPC分类号： G11B5/09 ,  G11B27/36

CPC分类号： G11B5/09 ,  B82Y10/00 ,  G11B5/59616 ,  G11B5/743 ,  G11B20/10009 ,  G11B20/10435 ,  G11B20/1879 ,  G11B2220/2516 ,  G11B2220/252

摘要： A hard-disk drive. The hard-disk drive includes a magnetic-recording disk including tracks on which a plurality of patterned bit-cells that are isolated magnetically are aligned at predetermined alignment pitches. The hard-disk drive includes a magnetic-recording head which is configured to follow tracks, and to write and to read data. The hard-disk drive includes a signal-processing unit which is configured to generate a recording signal based on a write-clock signal with cycles corresponding to alignment pitches of patterned bit-cells, and to output a recording signal. The hard-disk drive includes a phase-detecting unit which is configured to detect a phase of the write-clock signal when the magnetic-recording head reaches an end point of a predetermined range. The hard disk drive includes a determination-processing unit which is configured to determine success of data writing based on a difference between an expected value and a detected value of the phase of the write-clock signal.

摘要翻译： 硬盘驱动器。 硬盘驱动器包括磁记录盘，磁盘包括轨道，磁道上分离出多个图案化的位单元，以预定的对准间距排列。 硬盘驱动器包括磁记录头，其被配置为跟随轨道，并且写入和读取数据。 硬盘驱动器包括信号处理单元，其被配置为基于具有对应于图案化位单元的对准间距的周期的写时钟信号产生记录信号，并输出记录信号。 硬盘驱动器包括相位检测单元，其被配置为当磁记录头达到预定范围的终点时检测写时钟信号的相位。 硬盘驱动器包括确定处理单元，其被配置为基于期望值和写入时钟信号的相位的检测值之间的差来确定数据写入的成功。