公开(公告)号：US07944646B2

公开(公告)日：2011-05-17

申请号：US12008276

申请日：2008-01-09

申请人： Masafumi Mochizuki ,  Yukiya Shimizu ,  Shuji Nishida

发明人： Masafumi Mochizuki ,  Yukiya Shimizu ,  Shuji Nishida

IPC分类号： G11B5/127

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

摘要： In a patterned perpendicular magnetic recording medium, embodiments of the present invention provide a magnetic head in which magnetic field to be applied to adjacent tracks can be suppressed and a recording device equipped with the magnetic head. In one embodiment of the present invention, a sum of a width Pw of a main pole of a magnetic head and distances between right and left magnetic substances on a width-directional side of tracks and the main pole, so-called widths of side gap lengths s_g1—1 and s_g1—2 is, in a magnetic recording medium having a soft-magnetic underlayer, made to be not more than a sum of a width w_land of a convexity or land of the soft-magnetic underlayer and widths w_groove—1 and w_groove—2 of concavities or grooves adjacent to the land on both its sides.

摘要翻译： 在图案化的垂直磁记录介质中，本发明的实施例提供了一种可以抑制施加到相邻轨道的磁场的磁头和配备有磁头的记录装置。 在本发明的一个实施例中，磁头的主极的宽度Pw与轨道的宽度方向上的左右磁性物质与主极之间的距离之和，所谓的侧面间隙的宽度 长度s_g1-1和s_g1-2在具有软磁性底层的磁记录介质中被制成不大于软磁性底层的凸面或平面的宽度w_land与宽度w_沟槽-1的和 和两边的土地相邻的凹槽或凹槽的w_沟槽2。

公开(公告)号：US20110096638A1

公开(公告)日：2011-04-28

申请号：US12573069

申请日：2009-10-02

申请人： Masafumi Mochizuki ,  Hiroyasu Tanabe ,  Hideki Zaitsu ,  Hideaki Maeda

发明人： Masafumi Mochizuki ,  Hiroyasu Tanabe ,  Hideki Zaitsu ,  Hideaki Maeda

IPC分类号： G11B11/24 ,  G11B5/02

CPC分类号： G11B5/314 ,  G11B5/3116 ,  G11B5/6088 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A head-slider configured to fly in proximity to a recording surface of a magnetic-recording disk. The head-slider includes a write element including a main pole configured to generate a magnetic-recording field from a pole tip of the main pole in a first localized portion of the magnetic-recording disk. The head-slider also includes a magnetic-recording assistance element configured to provide energy to a second localized portion of the magnetic-recording disk in order to increase reversibility of a magnetization in a first localized portion of the magnetic-recording disk. A width of the pole tip of the main pole on a leading-edge side is wider than a width of the pole tip of the main pole on a trailing-edge side.

摘要翻译： 头部滑动器，其构造成在磁记录盘的记录表面附近飞行。 磁头滑块包括写入元件，该写入元件包括主磁极，该主极被配置为在磁记录盘的第一局部部分中从主极的极尖产生磁记录场。 磁头滑动器还包括磁记录辅助元件，其被配置为向磁记录盘的第二局部部分提供能量，以增加磁记录盘的第一局部部分中的磁化的可逆性。 前缘侧的主极的极尖的宽度比后缘侧的主极的极尖的宽度宽。

公开(公告)号：US07646564B2

公开(公告)日：2010-01-12

申请号：US11371609

申请日：2006-03-08

申请人： Yoji Maruyama ,  Hideki Zaitsu ,  Ichiro Ohdake ,  Kazue Kudo ,  Masafumi Mochizuki

发明人： Yoji Maruyama ,  Hideki Zaitsu ,  Ichiro Ohdake ,  Kazue Kudo ,  Masafumi Mochizuki

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/3163

摘要： Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.

摘要翻译： 本发明的实施例提供一种具有窄轨迹和优异的高频特性的垂直磁头。 在一个实施例中，记录磁头包括线圈导体和放置在其间的磁极片，其中主磁极片形成为平面结构，并且与主磁极片以磁耦合关系连接的磁膜为 在膜厚度方向上弯曲。 此外，设置在主磁极片附近的屏蔽材料由比用于读屏蔽材料的电阻高的材料制成。

公开(公告)号：US20090161263A1

公开(公告)日：2009-06-25

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： G11B5/33

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：US20070297097A1

公开(公告)日：2007-12-27

申请号：US11807744

申请日：2007-05-29

申请人： Katsuro Watanabe ,  Katsumi Hoshino ,  Masafumi Mochizuki

发明人： Katsuro Watanabe ,  Katsumi Hoshino ,  Masafumi Mochizuki

IPC分类号： G11B5/11

CPC分类号： G11B5/1278 ,  G11B5/3967

摘要： Embodiments in accordance with the present invention provide a magnetic head of the CPP structure for perpendicular magnetic recording, that is excellent in read performance, and stable in write/read performances by enhancing the external field durability, and further, suppresses deterioration in read sensor property, due to thermal factors. At least either shield layer of a lower magnetic shield layer, and an upper magnetic shield layer, closer to a perpendicular magnetic write head, is made up so as to have a multi-layered structure comprising low thermal expansion nonmagnetic layers, and magnetic layers. Material having a coefficient of thermal expansion smaller than that of a magnetoresistive film is selected as a material for the low thermal expansion nonmagnetic layers of the shield layer.

摘要翻译： 根据本发明的实施例提供了一种用于垂直磁记录的CPP结构的磁头，其读取性能优异，并且通过增强外部场强耐久性而在写入/读取性能方面稳定，并且还抑制读取传感器性能的劣化 ，由于热因素。 下磁屏蔽层的至少一个屏蔽层和更靠近垂直磁写头的上磁屏蔽层被制成具有包括低热膨胀非磁性层和磁性层的多层结构。 选择热膨胀系数小于磁阻膜的材料作为屏蔽层的低热膨胀非磁性层的材料。

公开(公告)号：US20060203384A1

公开(公告)日：2006-09-14

申请号：US11371609

申请日：2006-03-08

申请人： Yoji Maruyama ,  Hideki Zaitsu ,  Ichiro Ohdake ,  Kazue Kudo ,  Masafumi Mochizuki

发明人： Yoji Maruyama ,  Hideki Zaitsu ,  Ichiro Ohdake ,  Kazue Kudo ,  Masafumi Mochizuki

IPC分类号： G11B5/147

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/3163

摘要： Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.

摘要翻译： 本发明的实施例提供一种具有窄轨迹和优异的高频特性的垂直磁头。 在一个实施例中，记录磁头包括线圈导体和放置在其间的磁极片，其中主磁极片形成为平面结构，并且与主磁极片以磁耦合关系连接的磁膜为 在膜厚度方向上弯曲。 此外，设置在主磁极片附近的屏蔽材料由比用于读屏蔽材料的电阻高的材料制成。

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。