公开(公告)号：US09368152B1

公开(公告)日：2016-06-14

申请号：US14553460

申请日：2014-11-25

申请人： Seagate Technology LLC

发明人： MoonChol Park

IPC分类号： G11B5/09 ,  G11B11/10 ,  G11B27/36 ,  G11B20/18 ,  G11B7/0037 ,  G11B5/012

CPC分类号： G11B20/1889 ,  G11B5/012 ,  G11B7/00375 ,  G11B19/041 ,  G11B20/18 ,  G11B20/1816 ,  G11B20/1879 ,  G11B20/1883 ,  G11B27/36 ,  G11B2020/1873 ,  G11B2020/1893 ,  G11B2020/1896

摘要： Technologies are described herein for performing flexible virtual defect padding of bad sectors on recording media of a storage device. A defective sector on a data track of a recording medium in the storage device is detected. The size and position of a physical defect within the defective sector are determined, and one or more sectors adjacent to the defective sector on the data track are mapped as virtual defects based on the size and position of the physical defect within the defective sector.

摘要翻译： 这里描述了用于在存储设备的记录介质上执行坏扇区的灵活虚拟缺陷填充的技术。 检测存储装置中的记录介质的数据轨道上的缺陷扇区。 确定缺陷扇区内的物理缺陷的大小和位置，并且基于缺陷扇区内的物理缺陷的大小和位置将与数据磁道上的缺陷扇区相邻的一个或多个扇区映射为虚拟缺陷。

公开(公告)号：US09153274B2

公开(公告)日：2015-10-06

申请号：US14281469

申请日：2014-05-19

申请人： TDK CORPORATION

发明人： Eriko Ajioka

IPC分类号： G11B11/10 ,  G11B5/00

CPC分类号： G11B11/10 ,  G11B5/17 ,  G11B5/3123 ,  G11B5/3143 ,  G11B2005/0024 ,  Y10T428/1171

摘要： A microwave-assisted magnetic head provides a high-reliability microwave-assisted magnetic head that reduces effective coercivity by giving microwave energy to a magnetic recording medium in an auxiliary manner and writes a data signal, a head gimbal assembly, and a magnetic recording and reproducing apparatus. A microwave magnetic field generating element is arranged on a trailing shield side or a reproducing head element side with respect to a main magnetic pole that generates a recording magnetic field for writing a data signal into a magnetic recording medium, the microwave magnetic field generating element having a coil configuration in which a plurality of microwave magnetic field generating lines and a return line are formed by a continuous single line.

摘要翻译： 微波辅助磁头提供高可靠性的微波辅助磁头，通过以辅助方式向磁记录介质提供微波能量来降低有效的矫顽力，并写入数据信号，磁头万向节组件和磁记录和再现 仪器。 微波磁场产生元件相对于产生用于将数据信号写入磁记录介质的记录磁场的主磁极配置在后屏蔽侧或再现头元件侧，所述微波磁场产生元件具有 其中通过连续单线形成多个微波磁场产生线和返回线的线圈构造。

公开(公告)号：US07940486B2

公开(公告)日：2011-05-10

申请号：US11892882

申请日：2007-08-28

申请人： Koji Shimazawa ,  Kosuke Tanaka ,  Takaaki Domon

发明人： Koji Shimazawa ,  Kosuke Tanaka ,  Takaaki Domon

IPC分类号： G11B11/105 ,  G11B11/10 ,  G11B5/02 ,  G11B7/135 ,  G11B7/125

CPC分类号： G11B5/02 ,  G11B5/314 ,  G11B2005/0005 ,  G11B2005/0021

摘要： A laser diode is fixed to a light source support substrate and a first surface of a slider substrate is fixed to a second surface of the light source support substrate; therefore, the slider substrate and the laser diode are kept in a fixed positional relation. Since the laser diode faces a light entrance face of a core, long-distance propagation of light as in the conventional technology does not occur, and light emitted from a light emitting element is guided well to a medium-facing surface while permitting some mounting error and coupling loss of light. A spot size w of a light intensity distribution along the X-axis in the XY plane including an incident-light centroid position on the light entrance face is set larger than a thickness of the core, whereby variation in incidence efficiency is well suppressed against positional deviation.

摘要翻译： 激光二极管被固定到光源支撑基板上，并且滑块基板的第一表面固定到光源支撑基板的第二表面; 因此，滑块基板和激光二极管保持固定的位置关系。 由于激光二极管面向芯的光入射面，因此不会像现有技术那样发生长距离传播光，并且从发光元件发出的光很好地被引导到面向中间的表面，同时允许一些安装误差 和光耦合损耗。 在包括光入射面上的入射光重心位置的XY平面中沿着X轴的光强度分布的光斑尺寸w被设定为大于芯的厚度，由此良好地抑制了位置上的入射效率的变化 偏差。

公开(公告)号：US07911882B2

公开(公告)日：2011-03-22

申请号：US11604225

申请日：2006-11-27

申请人： Koji Shimazawa ,  Katsumichi Tagami

发明人： Koji Shimazawa ,  Katsumichi Tagami

IPC分类号： G11B7/125 ,  G11B7/135 ,  G11B11/10

CPC分类号： G11B5/314 ,  G11B5/3136 ,  G11B5/3967 ,  G11B5/4866 ,  G11B2005/001 ,  G11B2005/0021

摘要： A thin-film magnetic head that has a configuration in which the element-formed surface and the opposed-to-medium surface are perpendicular to each other, and a light source is sufficiently distanced from the medium surface is provided. The head comprises at least one near-field-light-generating layer for heating a part of a magnetic medium during write operation by generating a near-field light, having a shape tapered toward a head end surface on the opposed-to-medium surface side, and comprising a near-field-light-generating portion having a light-received surface and a tip reaching the head end surface on the opposed-to-medium surface side, and the light-received surface being sloped in respect to the element-formed surface and being provided in a position where an incident light propagating from a head end surface opposite to the opposed-to-medium surface can reach at least a part of the light-received surface.

摘要翻译： 提供具有其中元件形成表面和相对中间表面彼此垂直并且光源足够远离介质表面的构造的薄膜磁头。 头部包括至少一个近场光产生层，用于在写入操作期间通过产生近场光来加热磁性介质的一部分，其具有朝向相对中间表面上的头端表面逐渐变细的形状 并且包括具有光接收表面的近场光产生部分和到达相对 - 介质表面侧上的头端表面的尖端，并且光接收表面相对于元件倾斜 并且设置在从相对于中间相对面的头端面传播的入射光可以到达受光面的至少一部分的位置。

公开(公告)号：US07382706B2

公开(公告)日：2008-06-03

申请号：US11491240

申请日：2006-07-24

申请人： Yuki Nakamura

发明人： Yuki Nakamura

IPC分类号： G11B7/00 ,  G11B11/10

CPC分类号： G11B7/0062 ,  G11B7/0045 ,  G11B7/126

摘要： A driving power is applied to a light source to control emission of a light beam to a recording layer of an optical storage medium, the driving power including a sequence of mark and space portions, each mark portion having a pulse width that corresponds to a multiple of a period T of a write clock. A multi-pulse waveform of each mark portion of the driving power includes a front-end portion having a first pulse width t1 with a high-power write level Pw and starting from a middle-power erase level Pe, a multi-pulse portion including write pulses each having a second pulse width t2 with the write level Pw and a third pulse width t3 with a low-power base level Pb, the multi-pulse portion having a duty ratio z=t2/(t2+t3), and a tail-end portion having a fourth pulse width t4 with the base level Pb and ending at the erase level Pe. The waveform is controlled, when a linear velocity of rotation of the medium is set in a range from 5 m/s to 28 m/s, such that the first pulse width t1 ranges 0.1T to 1T and the fourth pulse width t4 ranges 0.2T to 1.3T.

摘要翻译： 向光源施加驱动功率以控制向光存储介质的记录层的光束的发射，驱动功率包括标记和空间部分的序列，每个标记部分具有对应于多个的脉冲宽度 的写时钟的周期T。 驱动功率的每个标记部分的多脉冲波形包括具有高功率写入电平Pw的第一脉冲宽度t 1并且从中间功率擦除电平Pe开始的前端部分，多脉冲部分 包括具有写入电平Pw的第二脉冲宽度t 2和具有低功率基极电平Pb的第三脉冲宽度t 3的写脉冲，多脉冲部分具有占空比z = t 2 /（t 2 + t 3）和具有基极电平Pb并以擦除电平Pe结束的第四脉冲宽度t 4的尾端部分。 当介质的旋转速度设定在5m / s至28m / s的范围内时，波形被控制，使得第一脉冲宽度t 1的范围为0.1T至1T，第四脉冲宽度t 4 范围0.2T至1.3T。

公开(公告)号：US07242651B2

公开(公告)日：2007-07-10

申请号：US10432638

申请日：2001-12-10

申请人： Kenji Asano ,  Hideaki Yano ,  Koichi Tada

发明人： Kenji Asano ,  Hideaki Yano ,  Koichi Tada

IPC分类号： G11B7/05 ,  G11B11/10

CPC分类号： G11B20/10222 ,  G11B7/005 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0945 ,  G11B11/10515 ,  G11B20/10009 ,  G11B20/10481 ,  G11B20/1816 ,  G11B27/10 ,  G11B2020/1287 ,  G11B2220/2562

摘要： The invention provides a disk playback device wherein a disk (1) is irradiated with a laser beam from an optical head (4) to reproduce signals from the disk, and which comprises an external synchronizing signal producing circuit (8) and a delay circuit (12) for producing a reproduction synchronizing signal providing reference timing at which a reproduced signal is detected by reading an output signal from the optical head (4), a circuit (7) for detecting the reproduced signal by reading the output signal from the optical head (4) based on the reproduction synchronizing signal, and a system controller (10) for determining an optimum phase for a normal reproduction operation by altering the phase of the reproduction synchronizing signal and executing a reproduction operation, the controller (10) being operable to make a phase adjustment for the reproduction synchronizing signal prepared by the delay circuit (12). A normal reproduction operation can be performed at all times by assuring the reproduction synchronizing signal of the optimum phase.

摘要翻译： 本发明提供了一种光盘播放装置，其中光盘（1）被来自光头（4）的激光束照射以再现来自盘的信号，并且包括外部同步信号产生电路（8）和延迟电路 12），用于产生再现同步信号，通过读取来自光头（4）的输出信号，提供检测再现信号的参考定时;电路（7），用于通过从光头读出输出信号来检测再现信号 （4），以及系统控制器（10），用于通过改变再现同步信号的相位并执行再现操作来确定用于正常再现操作的最佳相位，所述控制器（10）可操作为 对由延迟电路（12）准备的再现同步信号进行相位调整。 通过确保最佳相位的再现同步信号，可以始终执行正常再现操作。

公开(公告)号：US07132222B2

公开(公告)日：2006-11-07

申请号：US10825454

申请日：2004-04-14

申请人： Claude Chappert ,  Harry Bernas ,  Jacques Ferre

发明人： Claude Chappert ,  Harry Bernas ,  Jacques Ferre

IPC分类号： G03C5/00 ,  G11B11/10 ,  H01F41/14

CPC分类号： G11B5/855 ,  B82Y10/00 ,  B82Y20/00 ,  B82Y25/00 ,  B82Y40/00 ,  G02B6/1225 ,  G02F1/09 ,  G11B5/743 ,  G11B5/746 ,  G11B11/10582 ,  H01F10/123 ,  H01F10/3286 ,  H01F41/303 ,  H01F41/34

摘要： Process for writing on a material, in which said material is irradiated by means of a beam of light ions, such as for example He+ ions, said beam of light ions having an energy of the order of or less than a hundred keV, wherein this material comprises a plurality of superposed thin-layers, at least one of said thin layers being magnetic and in that one or more regions having sizes of the order of 1 micrometer or less are irradiated, the irradiation dose being controlled so as to be a few 1016 ions/cm2 or less, the irradiation modifying the composition of atomic planes in the material at one or more interfaces between two layers of the latter.

摘要翻译： 在材料上书写的方法，其中所述材料通过光束离子照射，例如He + +离子，所述光束离子具有等级或 小于100keV，其中该材料包括多个重叠的薄层，所述薄层中的至少一个是磁性的，并且辐射具有1微米或更小的尺寸的一个或多个区域，照射剂量 被控制为几十个16 /离子/ cm 2以下，照射在两层之间的一个或多个界面处改变材料中原子平面的组成 的后者。

公开(公告)号：US06950261B2

公开(公告)日：2005-09-27

申请号：US10058872

申请日：2002-01-24

申请人： Yuzo Seo ,  Hiroyuki Ikeda ,  Takeshi Kuriwada ,  Toshihiko Kuriyama

发明人： Yuzo Seo ,  Hiroyuki Ikeda ,  Takeshi Kuriwada ,  Toshihiko Kuriyama

IPC分类号： G11B11/10 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/55 ,  G11B5/596 ,  G11B5/82 ,  G11B5/84 ,  G11B5/855 ,  G11B13/04

CPC分类号： B82Y10/00 ,  G11B5/012 ,  G11B5/553 ,  G11B5/59633 ,  G11B5/743 ,  G11B5/82 ,  G11B5/855 ,  G11B13/045 ,  G11B2005/0021 ,  G11B2005/0029

摘要： A magnetic pattern forming apparatus, which is designed to form a desired magnetic pattern on a magnetic disk having a magnetic layer on a substrate, is made up of a mask having a pattern identical or similar to the desired magnetic pattern, a projection optical system for exposing the magnetic disk to a spot-like energy beam coming through the mask to heat the magnetic layer for projecting the mask pattern to the magnetic disk at a one-to-one ratio or a predetermined reduction ratio, a magnetic field applying device for applying an external magnetic field to the magnetic disk, a control unit for conducting scanning with the spot-like energy beam with respect to the magnetic disk and the mask in their radial directions while rotating the magnetic disk and the mask.

公开(公告)号：US06947236B2

公开(公告)日：2005-09-20

申请号：US09925907

申请日：2001-08-09

申请人： Masaki Hamamoto ,  Hiroyuki Katayama ,  Kunio Kojima ,  Junichi Sato ,  Kazuhisa Takayama ,  Kosuke Watanabe

发明人： Masaki Hamamoto ,  Hiroyuki Katayama ,  Kunio Kojima ,  Junichi Sato ,  Kazuhisa Takayama ,  Kosuke Watanabe

IPC分类号： G11B11/10 ,  G11B5/00 ,  G11B5/02 ,  G11B11/105

CPC分类号： G11B5/00 ,  G11B2005/0002 ,  G11B2005/0021

摘要： A magnetic signal recording method of the present invention superimposes a recording edge of a recordable region on a region where there is substantial equality between (a) a coercive force in a region on a magnetic recording medium in which the coercive force has been varied, and (b) magnetic field intensity, which is generated by a magnetic recording head. The magnetic field intensity has a magnetic field distribution whose lowering rate in an in-track position is maximum in the region. The magnetic recording head, whose recording magnetic field is distributed in a rectangular shape, is used in this way so as to form a magnetic bit having a rectangular shape that is suitable for reproduction performed by a common reproduction head having a rectangular reproduction region, thereby improving an S/N of a reproduction signal dramatically.

摘要翻译： 本发明的磁信号记录方法将可记录区域的记录边缘叠加在（a）在矫顽力已经变化的磁记录介质上的区域中的矫顽力之间基本相等的区域，以及 （b）由磁记录头产生的磁场强度。 磁场强度具有磁场分布，其在轨道位置的下降率在该区域中是最大的。 以这种方式使用其记录磁场分布为矩形形状的磁记录头，以便形成具有矩形形状的磁头，该矩形形状适于由具有矩形再现区域的共同再现头执行的再现，由此 大大提高了再生信号的S / N。

公开(公告)号：US20050163962A1

公开(公告)日：2005-07-28

申请号：US10893887

申请日：2004-07-20

申请人： Yoshiaki Kawato ,  Kenchi Ito

发明人： Yoshiaki Kawato ,  Kenchi Ito

IPC分类号： G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/738 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B5/656 ,  G11B5/65 ,  G11B5/66 ,  Y10T428/265

摘要： A perpendicular magnetic recording medium for thermo-magnetic printing has an ultra-high recording density and is resistant to thermal decay of magnetization. An intermediate layer of the medium is provided between a first recording layer using a low-noise Co alloy ferromagnetic substance and a second recording layer using a ferrimagnetic substance (e.g., a rare-earth element-transition metal compound) having a compensation temperature below an operation ambient temperature. A magnetic field is applied thereto to form a magnetization pattern on the first recording layer. It is then heated-up to be printed onto the second recording layer, which has a higher coercivity at the ambient temperature, and a recording field is suitably set to form a magnetization pattern only on the first recording layer. The magnetization pattern is printed from the first recording layer to the second recording layer.

摘要翻译： 用于热磁性印刷的垂直磁记录介质具有超高记录密度，并且耐磁化热衰减。 介质的中间层设置在使用低噪声Co合金铁磁性物质的第一记录层和使用补偿温度低于1的亚铁磁物质（例如，稀土元素 - 过渡金属化合物）的第二记录层之间 操作环境温度。 施加磁场以在第一记录层上形成磁化模式。 然后将其加热印刷到在环境温度下具有较高矫顽力的第二记录层上，并且适当地设置记录场以仅在第一记录层上形成磁化图案。 磁化图案从第一记录层印刷到第二记录层。