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31. 发明申请

US20100128376A1 MAGNETIC DISK DRIVE HAVING ASSISTED RECORDING AND METHODS OF RECORDING DATA THERETO 有权
标题翻译：具有辅助记录的磁盘驱动器和记录数据的方法
公开(公告)号：US20100128376A1
公开(公告)日：2010-05-27
申请号：US12615219
申请日：2009-11-09
申请人： Hiroyasu Tanabe , Hideaki Maeda , Hideki Zaitsu , Masafumi Mochizuki
发明人： Hiroyasu Tanabe , Hideaki Maeda , Hideki Zaitsu , Masafumi Mochizuki
IPC分类号： G11B27/36
CPC分类号： G11B5/012 , G11B5/09 , G11B5/455 , G11B2005/0005 , G11B2005/0021
摘要： In one embodiment, a magnetic disk drive includes a magnetic disk, a head slider for flying above the spinning magnetic disk, a pattern analyzer for analyzing a data pattern of data to be recorded on the magnetic disk to determine a recording current reversal timing and a recording assistance area in accordance with the analysis so that the rear end of the determined recording assistance area is shifted forward if the determined recording current reversal timing is earlier than a criterion, or the rear end of the determined recording assistance area is shifted backward if the determined recording current reversal timing is later than the criterion, a recording assistance element on the slider for forming the determined recording assistance area on the magnetic disk, and a recording element for recording the data on the magnetic disk using the recording current in accordance with the determined recording current reversal timing.
摘要翻译：在一个实施例中，磁盘驱动器包括磁盘，用于在旋转磁盘上方飞行的磁头滑块，用于分析要记录在磁盘上的数据的数据模式以确定记录电流反转定时的模式分析器，以及记录辅助区域，如果所确定的记录电流反转定时早于标准，则确定的记录辅助区域的后端向前移动，或者如果确定的记录辅助区域的后端如果确定的记录电流反转时间晚于该标准，用于在磁盘上形成确定的记录辅助区域的滑块上的记录辅助元件，以及用于使用记录电流将数据记录在磁盘上的记录元件确定记录电流反转时序。

32. 发明授权

US07715152B2 Magnetic recording head for perpendicular recording, fabrication process, and magnetic disk storage apparatus mounting the magnetic head 有权
标题翻译：用于垂直记录的磁记录头，制造过程和安装磁头的磁盘存储装置
公开(公告)号：US07715152B2
公开(公告)日：2010-05-11
申请号：US11012990
申请日：2004-12-14
申请人： Tomohiro Okada , Isao Nunokawa , Masafumi Mochizuki
发明人： Tomohiro Okada , Isao Nunokawa , Masafumi Mochizuki
IPC分类号： G11B5/127 , G11B5/147 , G11B5/33
CPC分类号： G11B5/315 , G11B5/11 , G11B5/112 , G11B5/1278
摘要： Embodiments of the invention provide a perpendicular magnetic writing head with a suppressed effective track width to be written on a magnetic medium while increasing writing magnetic field gradient. In one embodiment a trailing side shield is disposed by way of a gap film to a main pole of a perpendicular writing magnetic head. A gap distance (Gt) on a trailing side of the main pole and a gap distance (Gs) on a lateral side of the main pole is defined as Gt
摘要翻译：本发明的实施例提供一种具有抑制的有效磁道宽度的垂直写磁头，以便在增加磁场梯度的同时写入磁介质。在一个实施例中，后侧屏蔽件通过间隙膜设置到垂直写入磁头的主极。主极后侧的间隙距离（Gt）和主极侧面的间隙距离（Gs）定义为Gt

33. 发明授权

US07639452B2 Magnetic head for perpendicular recording and fabrication process 有权
标题翻译：用于垂直记录和制造过程的磁头
公开(公告)号：US07639452B2
公开(公告)日：2009-12-29
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： G11B5/127
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 bearing 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，包括暴露在空气轴承表面上的主极极极端部的结构，从空气轴承表面凹陷并且在前侧抵靠空气轴承表面具有锥形面的部分，以及连接有磁性材料的磁性材料主杆采用。

34. 发明申请

US20090313811A1 METHOD OF MANUFACTURING A PERPENDICULAR MAGNETIC RECORDING HEAD 有权
标题翻译：一种完整的磁记录头的制造方法
公开(公告)号：US20090313811A1
公开(公告)日：2009-12-24
申请号：US12487306
申请日：2009-06-18
申请人： Toshio Takahashi , Akihiro Nanba , Masafumi Mochizuki
发明人： Toshio Takahashi , Akihiro Nanba , Masafumi Mochizuki
IPC分类号： H04R31/00
CPC分类号： G11B5/1278 , G11B5/3163 , G11B5/3169 , G11B5/3173 , G11B5/3967 , Y10T29/49036 , Y10T29/49039 , Y10T29/49043 , Y10T29/49044 , Y10T29/49048 , Y10T29/49052 , Y10T29/4906
摘要： In a manufacturing process of a head slider according to one embodiment, a flare point height of a main pole is estimated according to the following procedure. Magnetic field intensity is measured by a sensor, and a maximum point of the magnetic field is assumed as a center of the main pole. The measurement is moved from the center point along a Z direction, such that a measurement value corresponds to a reference value. An attenuation rate (a gradient) of a measurement value of magnetic field intensity to displacement in the Z direction of the measurement point is calculated and normalized with the measurement value, and plotted with respect to the measurement value itself. The gradient is compared to a gradient in a database of samples being separately prepared, each sample having known flare point height, allowing an estimation of the flare point height of the said sample from the comparison.
摘要翻译：在根据一个实施例的磁头滑块的制造过程中，根据以下过程来估计主极的耀斑高度。磁场强度由传感器测量，磁场的最大点被认为是主极的中心。测量从中心点沿Z方向移动，使得测量值对应于参考值。计算测量点的Z方向的磁场强度测量值与位移的衰减率（梯度），并用测量值对其进行归一化，并相对于测量值本身绘制。将梯度与分别制备的样品的数据库中的梯度进行比较，每个样品具有已知的光斑高度，允许从比较中估计所述样品的耀斑高度。

35. 发明授权

US07426092B2 Magnetic head and magnetic disk storage apparatus mounting the head 失效
标题翻译：安装磁头的磁头和磁盘存储装置
公开(公告)号：US07426092B2
公开(公告)日：2008-09-16
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。

36. 发明申请

US20070217066A1 Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 失效
标题翻译：薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器
公开(公告)号：US20070217066A1
公开(公告)日：2007-09-20
申请号：US11802297
申请日：2007-05-22
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： G11B5/127
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 (oersted), while also modified to suppress remanent magnetic fields occurring immediately after writing operation. In a perpendicular magnetic head comprising a main pole, a return path for supplying a magnetic flux to that 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 has a thickness within 0.5 to 5 nanometers, the high saturation flux density layer has a thickness from 10 to 50 nanometers for suppressing remanent magnetization and preventing 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，并产生超过10kOe（奥斯特）的高磁记录场，同时还被修改以抑制写入后立即发生的残留磁场操作。在包括主极，用于向该主极提供磁通的返回路径和用于激励主极返回路径的导电线圈的垂直磁头中，主极的极宽为200纳米以下，以及由高饱和磁通密度层和低饱和磁通密度层组成的磁性层，低饱和磁通密度层的厚度在0.5〜5纳米之间，高饱和磁通密度层的厚度为10〜50纳米，通过利用极中的闭合磁畴结构来抑制剩磁，并防止写入后的擦除。

37. 发明授权

US07038881B2 Magnetic head for perpendicular recording including a main pole having a pole tip with three tapered sides 失效
标题翻译：用于垂直记录的磁头，包括具有三个锥形侧面的极尖的主极
公开(公告)号：US07038881B2
公开(公告)日：2006-05-02
申请号：US10648344
申请日：2003-08-27
申请人： Kenchi Ito , Yoshiaki Kawato , Masafumi Mochizuki
发明人： Kenchi Ito , Yoshiaki Kawato , Masafumi Mochizuki
IPC分类号： G11B5/187 , G11B5/39
CPC分类号： G11B5/012 , G11B5/1278 , G11B5/1871 , G11B5/4886 , G11B2005/0029 , Y10T29/49052
摘要： The invention provides a magnetic head for perpendicular recording capable of recording with high linear recording density and high track density, and a magnetic disk drive incorporating the same. In order to achieve this, one or more sides of the main pole of the magnetic head for perpendicular recording except for the trailing side are formed in a taper with an appropriate angle against the tip surface of the main pole, and the yoke whose widest principal plane is in parallel to the tip surface is provided on the bottom of the main pole.Thereby, the invention achieves the magnetic head for perpendicular recording that generates a sufficiently high magnetic field, and assumes a sharp gradient of magnetic field on the trailing side. By incorporating this magnetic head, a magnetic disk drive capable of handling high linear recording density can be produced.
摘要翻译：本发明提供一种用于能够以高线性记录密度和高轨道密度进行记录的垂直记录磁头和包含该磁头的磁盘驱动器。为了实现这一点，用于垂直记录的磁头的主极的除了后侧之外的一个或多个侧面以相对于主极的尖端表面具有适当角度的锥形形成，并且最主要的轭平面与顶表面平行设置在主极的底部。因此，本发明实现了用于垂直记录的磁头，其产生足够高的磁场，并且在后侧呈现尖锐的磁场梯度。通过并入该磁头，可以产生能够处理高线性记录密度的磁盘驱动器。

38. 发明授权

US07024617B2 Data decoding method and circuit and information recording and reproducing apparatus using the same 失效
标题翻译：数据解码方法及使用其的电路和信息记录和再现装置
公开(公告)号：US07024617B2
公开(公告)日：2006-04-04
申请号：US10206211
申请日：2002-07-29
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 occurrences, 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。

39. 发明授权

US06657813B2 Perpendicular magnetic recording system 有权
标题翻译：垂直磁记录系统
公开(公告)号：US06657813B2
公开(公告)日：2003-12-02
申请号：US09785417
申请日：2001-02-20
申请人： Yasutaka Nishida , Hisashi Takano , Masafumi Mochizuki
发明人： Yasutaka Nishida , Hisashi Takano , Masafumi Mochizuki
IPC分类号： G11B5127
CPC分类号： G11B5/1278 , G11B5/00 , G11B5/488 , G11B5/667 , G11B5/73 , G11B2005/0029 , Y10T428/11 , Y10T428/31826
摘要： To make a soft magnetic underlayer of a double layered perpendicular magnetic recording medium thinner than heretofore while avoiding saturation. Assuming that Tb1 is the thickness of the soft magnetic underlayer of the double layered perpendicular magnetic recording medium, BS2 the saturation flux density of the same, Tm the thickness of a magnetic recording head's main pole 1 along a track direction in the vicinity of its floating surface, TWW the track width of the same, and BS1 the saturation flux density of the same, then Tb1
摘要翻译：为了制造比以前更薄的双层垂直磁记录介质的软磁性底层，同时避免饱和。假设Tb1是双层垂直磁记录介质的软磁性底层的厚度，则BS2的饱和磁通密度为Tm，磁记录头主极1的沿其轨迹方向的厚度在其浮动附近表面，TWW的轨道宽度相同，BS1的饱和磁通密度相同，则Tb1 <（BS1xTmxTWW）/ 2（BS2x（Tm + TWW））得到满足。

40. 发明授权

US4380780A Disc-shaped recording medium reproducing apparatus 失效
标题翻译：碟形记录介质再现装置
公开(公告)号：US4380780A
公开(公告)日：1983-04-19
申请号：US243438
申请日：1981-03-13
申请人： Atsumi Hirata , Osamu Tajima , Isami Kaneda , Hiroyuki Sugiyama , Takashi Saito , Masafumi Mochizuki
发明人： Atsumi Hirata , Osamu Tajima , Isami Kaneda , Hiroyuki Sugiyama , Takashi Saito , Masafumi Mochizuki
IPC分类号： G11B17/049 , G11B17/04 , G11B19/10 , G11B23/03 , G11B5/012 , G11B5/016 , G11B5/52 , G11B23/02
CPC分类号： G11B17/049 , G11B19/10 , G11B23/0328
摘要： A reproducing apparatus reproduces a loaded disc-shaped recording medium derived from a case. The case comprises a jacket which has a space for accomodating 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 member 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 turntable for rotating the disc-shaped recording medium, a clamping mechanism for clamping at least one of the disc-shaped recording medium or the lid member provided at the innermost part on the opposite side from the inserting opening with respect to the turntable, a detecting mechanism for detecting whether the disc-shaped recording medium is loaded within the reproducing apparatus, and an arresting mechanism provided at the vicinity of the inserting opening, for arresting the insertion of a jacket having the lid member into the reproducing apparatus and allowing the insertion of a jacket not having the lid member into the reproducing apparatus, by displacing according to the detecting operation of the above detecting mechanism. The arresting mechanism allows the insertion of the jacket having or not having the lid member into the reproducing apparatus in a state where the detecting mechanism is not performing a detecting operation.
摘要翻译：再现装置再现从壳体导出的装载的盘形记录介质。壳体包括具有用于容纳盘形记录介质的空间和用于允许盘形记录介质进出外壳的开口的外套，以及插入穿过外套的开口的盖构件，用于封闭外套的开口。再现装置包括插入壳体的插入开口，用于旋转盘形记录介质的转盘，用于夹持设置在最内部的盘形记录介质或盖构件中的至少一个的夹紧机构与插入开口相对于转台的相对侧，用于检测盘形记录介质是否装载在再现装置内的检测机构，以及设置在插入孔附近的止动机构，用于阻止插入通过根据上述检测机构的检测操作移位，将具有盖构件的护套设置到再现装置中并允许将不具有盖构件的护套插入再现装置。阻止机构允许在检测机构不执行检测操作的状态下将具有或不具有盖构件的护套插入到再现装置中。

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