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31.发明授权Data decoding method and circuit and information recording and reproducing apparatus using the same 失效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
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。
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公开(公告)号：US06657813B2
公开(公告)日：2003-12-02
申请号：US09785417
申请日：2001-02-20
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。
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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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34.发明授权公开(公告)号：US08786984B2
公开(公告)日：2014-07-22
申请号：US13297106
申请日：2011-11-15
申请人： Sarbanoo Das , Masafumi Mochizuki
发明人： Sarbanoo Das , Masafumi Mochizuki
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/314 , G11B5/315 , G11B2005/0002
摘要： In one embodiment, a magnetic head includes a main pole configured to produce a magnetic writing field applied to a magnetic medium at an overall angle with respect to a magnetic anisotropy axis which is oriented in a direction perpendicular to a plane of a surface of the magnetic medium, and at least one current carrying element positioned near a media facing surface of the main pole configured to produce an assisting magnetic field applied in a cross-track direction parallel to the plane of the surface of the magnetic medium. In another embodiment, a method includes applying a writing magnetic field to write data to a magnetic medium and applying an assisting magnetic field to the magnetic medium for assisting the writing magnetic field, the assisting magnetic field being applied in a cross-track direction of the magnetic medium and parallel to a plane of a surface of the magnetic medium.
摘要翻译： 在一个实施例中，磁头包括主极，该主极被配置为产生相对于磁各向异性轴以整个角度施加到磁介质的磁场，该磁各向异性轴在垂直于磁性表面的平面的方向上取向 介质和至少一个载流元件，其定位在主极的面向介质的表面附近，其被配置为产生沿平行于磁介质的表面的平面的交叉轨道方向施加的辅助磁场。 在另一个实施例中，一种方法包括：施加写磁场以将数据写入磁介质，并向磁介质施加辅助磁场以辅助写入磁场，辅助磁场沿着 磁介质并且平行于磁介质的表面的平面。
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35.发明申请MAGNETIC-RECORDING HEAD WITH TOUCH-DOWN DETECTOR INCORPORATING A CARBON NANO-TUBE 有权配有碳纳米管的触控式探头的磁记录头公开(公告)号：US20130170070A1
公开(公告)日：2013-07-04
申请号：US13341755
申请日：2011-12-30
申请人： Sarbanoo Das , Masafumi Mochizuki
发明人： Sarbanoo Das , Masafumi Mochizuki
CPC分类号： G11B5/607 , B82Y10/00 , B82Y15/00 , G11B5/40 , G11B5/6076
摘要： A magnetic-recording head with touch-down detector incorporating a carbon nano-tube (CNT). The magnetic-recording head includes a write element, a read element and a touch-down detector. The write element is configured to write data to a magnetic-recording disk. The read element is configured to read data from the magnetic-recording disk. The touch-down detector includes a thermal sensor, and a CNT portion. The thermal sensor is configured to convert heat to a voltage signal. The CNT portion is configured to touch down on the magnetic-recording disk. The CNT portion is also coupled to the thermal sensor, and is configured to transfer heat generated by contact between the CNT portion and the magnetic-recording disk to the thermal sensor. A hard-disk drive (HDD) including the magnetic-recording head with touch-down detector incorporating a CNT, and a method for detecting contact between the magnetic-recording head and a recording surface of a magnetic-recording disk are also provided.
摘要翻译： 具有碳纳米管（CNT）的触摸屏检测器的磁记录头。 磁记录头包括写入元件，读取元件和触控下降检测器。 写元件被配置为将数据写入磁记录盘。 读取元件被配置为从磁记录盘读取数据。 触摸屏检测器包括热传感器和CNT部分。 热传感器被配置为将热量转换成电压信号。 CNT部分配置成在磁记录盘上向下触摸。 CNT部分还耦合到热传感器，并且被配置为将由CNT部分和磁记录盘之间的接触产生的热传递到热传感器。 还提供了包括具有CNT的具有触下检测器的磁记录头的硬盘驱动器（HDD），以及用于检测磁记录头与磁记录盘的记录表面之间的接触的方法。
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36.发明授权Writer having a shield structure for adjacent and far track interference refreshment 有权具有用于相邻和远距离干扰更新的屏蔽结构的作者公开(公告)号：US08411384B2
公开(公告)日：2013-04-02
申请号：US13154343
申请日：2011-06-06
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/315
摘要： In one embodiment, a data storage system includes a magnetic head having a main magnetic pole and a wrap around shield positioned around the main magnetic pole at an ABS thereof, a magnetic medium, a drive mechanism for passing the magnetic medium over the magnetic head, and a controlling mechanism electrically coupled to the magnetic head for controlling operation of the magnetic head that initiates rewriting of information of a recording track of the magnetic medium if a recording magnetic field applied to the recording track exceeds a threshold. In another embodiment, a method includes writing data to a first track of a magnetic medium using a magnetic head, determining characteristics consistent with data degradation from tracks adjacent to the first track and far tracks away from the first track using a controlling mechanism, and rewriting data in tracks determined to be degraded due to ATI and/or FTI.
摘要翻译： 在一个实施例中，数据存储系统包括具有主磁极的磁头和围绕主体磁极定位在其ABS处的绕环屏蔽件，磁介质，用于使磁介质穿过磁头的驱动机构， 以及电磁耦合到磁头的控制机构，用于控制磁头的操作，如果施加到记录磁道的记录磁场超过阈值，则启动重写磁介质的记录磁道的信息。 在另一个实施例中，一种方法包括使用磁头将数据写入磁介质的第一轨道，使用控制机构确定与第一轨道相邻的轨道的数据退化与远离第一轨迹的轨迹的特性，以及重写 确定由于ATI和/或FTI而降级的轨道中的数据。
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37.发明授权公开(公告)号：US08363355B2
公开(公告)日：2013-01-29
申请号：US12698834
申请日：2010-02-02
IPC分类号： G11B5/127
CPC分类号： G11B5/314 , G11B5/3146 , G11B2005/0002 , G11B2005/0024
摘要： A magnetic head, according to one embodiment, includes a microwave generator provided with a main magnetic pole, an auxiliary magnetic pole, a coil wound around a magnetic circuit, the magnetic circuit including the main magnetic pole and the auxiliary magnetic pole, and a magnetic film, the film being provided near an ABS side of the main magnetic pole. A first distance in an element thickness direction between film surfaces of the magnetic film and the main magnetic pole at a top end in an element height direction of the microwave generator is greater than a second distance between film surfaces of the magnetic film comprising the microwave generator and the main magnetic pole at the ABS. In other approaches, the main magnetic pole may have a shape which gradually widens from a flare point away from the ABS in an element height direction. Additional systems and methods are also presented.
摘要翻译： 根据一个实施例的磁头包括设置有主磁极，辅助磁极，缠绕在磁路上的线圈的微波发生器，包括主磁极和辅助磁极的磁路和磁性磁头 胶片，该胶片设置在主磁极的ABS侧附近。 在微波发生器的元件高度方向的顶端处的磁性膜和主磁极的膜表面之间的元件厚度方向上的第一距离大于包括微波发生器的磁性膜的膜表面之间的第二距离 和ABS的主磁极。 在其它方法中，主磁极可以具有在元件高度方向上从喇叭口远离ABS逐渐变宽的形状。 还介绍了其他系统和方法。
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公开(公告)号：US08225486B2
公开(公告)日：2012-07-24
申请号：US12487306
申请日：2009-06-18
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, a plurality of head elements are formed on a wafer, each head element comprising: a return pole, a coil, and a main pole. The wafer is cut into respective head elements so that individual head sliders are formed. A ratio of an amplitude of an electrical signal applied to the coil of the write head on the head slider to an amplitude of output from an independent magnetic field sensor not embedded in the head slider is calculated, where the independent magnetic field sensor is disposed near the main pole so as to be opposed to the main pole across the air bearing surface, and where the ratio is calculated while a displacement between the main pole and the magnetic field sensor is swept. A flare point height of the main pole is determined from the calculated amplitude ratio.
摘要翻译： 在磁头滑块的制造过程中，在晶片上形成多个磁头元件，每个磁头元件包括：返回磁极，线圈和主极。 将晶片切割成相应的头部元件，从而形成单独的头部滑动件。 计算施加到头部滑块上的写入头的线圈的电信号的幅度与未嵌入磁头滑块中的独立磁场传感器的输出振幅的比率，其中独立磁场传感器设置在 主极与主轴相对，横跨空气轴承表面，并且在主极和磁场传感器之间的位移被扫描时计算该比率。 从所计算的振幅比确定主极的点火高度。
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39.发明授权Thin film perpendicular magnetic recording head, their fabrication process and magnetic disk drive using it 有权薄膜垂直磁记录头，其制造工艺和使用它的磁盘驱动器公开(公告)号：US08085499B2
公开(公告)日：2011-12-27
申请号：US12888621
申请日：2010-09-23
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。
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公开(公告)号：US20110249359A1
公开(公告)日：2011-10-13
申请号：US12756947
申请日：2010-04-08
CPC分类号： G11B5/1871 , G11B5/1278 , G11B5/23 , G11B5/3116 , G11B5/315
摘要： A magnetic head, according to one embodiment, includes a main magnetic pole having a protruding portion such that a distance from a first side of a trailing edge of the main magnetic pole to a leading edge of the main magnetic pole is different from a distance from a second side of the trailing edge of the main magnetic pole to the leading edge of the main magnetic pole, an auxiliary magnetic pole, and a coil wound around a magnetic circuit, the magnetic circuit including the main magnetic pole and the auxiliary magnetic pole. In another embodiment, a disk drive system includes a magnetic storage medium, at least one magnetic head as described previously for writing to the magnetic medium, a slider for supporting the magnetic head, and a control unit coupled to the magnetic head for controlling operation of the magnetic head. Additional systems and heads are also presented.
摘要翻译： 根据一个实施例的磁头包括具有突出部分的主磁极，使得从主磁极的后缘的第一侧到主磁极的前缘的距离不同于 主磁极的后缘的第二面到主磁极的前缘，辅助磁极和缠绕在磁路上的线圈，磁路包括主磁极和辅助磁极。 在另一个实施例中，磁盘驱动器系统包括磁存储介质，至少一个如前所述用于写入磁介质的磁头，用于支撑磁头的滑块和耦合到磁头的控制单元，用于控制磁头 磁头。 还提供了附加的系统和头。
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