公开(公告)号：US20020034052A1

公开(公告)日：2002-03-21

申请号：US09943087

申请日：2001-08-31

Inventor： Akihiko Takeo ,  Yoichiro Tanaka

IPC: G11B005/55

CPC classification number: G11B5/581

Abstract: There is disclosed a disk drive having a magnetic device for applying a direct current magnetic field to the disk 1 by using a disk with a double-layered structure in which a soft magnetic layer is provided on a lower layer of the recording magnetic layer. The magnetic device generates a direct current magnetic field to uniform a magnetic domain state of the soft magnetic layer of the disk. The intensity of the direct current is larger than the anisotropic magnetic field of the soft magnetic layer and is smaller than the coercive force of the recording magnetic layer. As a consequence, the stabilization of the magnetic domain state of the soft magnetic layer of the disk can be realized to make an attempt of decreasing the magnetic noise and establishing stabilization with respect to the disturbance magnetic field.

Abstract translation: 公开了一种磁盘驱动器，其具有用于通过使用其中在记录磁性层的下层上提供软磁性层的双层结构的盘将直流磁场施加到盘1的磁性装置。 磁性装置产生直流磁场以使磁盘的软磁性层的磁畴状态均匀。 直流电流的强度大于软磁性层的各向异性磁场，并且小于记录磁性层的矫顽力。 结果，可以实现磁盘的软磁性层的磁畴状态的稳定化，从而试图减小磁噪声并建立相对于扰动磁场的稳定性。

公开(公告)号：US06359746B1

公开(公告)日：2002-03-19

申请号：US08775692

申请日：1996-12-31

Applicant: Shigeru Kakekado ,  Tetsuo Inoue

Inventor： Shigeru Kakekado ,  Tetsuo Inoue

IPC: G11B2102

CPC classification number: G11B5/6005 ,  G11B5/54 ,  G11B5/581 ,  G11B21/21

Abstract: A magnetic disk drive according to the invention is comprises a rotary magnetic disk, a magnetic head having a head slider arranged oppositely to the magnetic disk and a transducer supported by the head slider for performing recording/reproducing information to and from the magnetic disk, and voltage applying section for applying a voltage across the head slider and the magnetic disk in accordance with at least one of a track position on the magnetic disk in which the magnetic head is positioned and the operation mode of the magnetic disk drive.

Abstract translation: 根据本发明的磁盘驱动器包括旋转磁盘，具有与磁盘相对布置的磁头滑块的磁头和由磁头滑动器支撑的换能器，用于向/从磁盘执行记录/再现信息，以及 电压施加部分，用于根据位于磁头的磁盘上的轨道位置和磁盘驱动器的操作模式中的至少一个，在磁头滑块和磁盘两端施加电压。

公开(公告)号：US5801906A

公开(公告)日：1998-09-01

申请号：US764459

申请日：1996-12-12

Applicant: Masahiro Yanagisawa ,  Akinobu Sato ,  Ken Ajiki

Inventor： Masahiro Yanagisawa ,  Akinobu Sato ,  Ken Ajiki

IPC: G11B21/20 ,  G11B5/58 ,  G11B23/50 ,  G11B5/48

CPC classification number: G11B23/505 ,  G11B5/58 ,  G11B5/581

Abstract: A ferroelectric thin film (6) is formed on the surface of a support spring (4) for pressing a magnetic head (3) against a magnetic disc (1) so that the magnetic head (3) is in close contact with the magnetic disc (1). When the magnetic head (3) jumps out of the magnetic disc (1), electrostatic attractive force acts between the ferroelectric thin film (6) and the magnetic disc (1) to prevent the jumping of the magnetic head (3). Further, when the magnetic head (3) is excessively pressed against the magnetic disc (1), electrostatic repulsive force acts between the ferroelectric thin film (6) and the magnetic disc (1) to prevent the pressing force from increasing, thereby preventing the magnetic head (3) and the magnetic recording surface of the magnetic disc (1) from being worn or scratched.

Abstract translation: 在用于将磁头（3）压靠在磁盘（1）上的支撑弹簧（4）的表面上形成铁电薄膜（6），使得磁头（3）与磁盘 （1）。 当磁头（3）跳出磁盘（1）时，静电引力作用在铁电薄膜（6）和磁盘（1）之间，以防止磁头（3）的跳跃。 此外，当磁头（3）被过度压在磁盘（1）上时，铁电薄膜（6）和磁盘（1）之间产生静电斥力，以防止按压力增大，从而防止 磁头（3）和磁盘（1）的磁记录表面不会磨损或划伤。

公开(公告)号：US09978402B2

公开(公告)日：2018-05-22

申请号：US15255105

申请日：2016-09-01

Applicant: TSINGHUA UNIVERSITY

Inventor： Quanshui Zheng ,  Shoumo Zhang

IPC: G11B5/255 ,  G11B5/31 ,  G11B5/58 ,  C01B32/186 ,  C01B32/188

CPC classification number: G11B5/3106 ,  C01B32/186 ,  C01B32/188 ,  G11B5/102 ,  G11B5/255 ,  G11B5/3163 ,  G11B5/581 ,  G11B5/6082

Abstract: A magnetic head includes a head slider. The head slider includes a contact surface corresponding to a disk body, and the contact surface is a flat surface. The contact surface is coated with at least one smooth atomic-scale coating formed by a two-dimensional atomic crystal material. The head slider atomically contacts with the disk body.

公开(公告)号：US20180122410A1

公开(公告)日：2018-05-03

申请号：US15697260

申请日：2017-09-06

Applicant: International Business Machines Corporation

Inventor： Robert G. Biskeborn

IPC: G11B5/255 ,  G11B5/008 ,  G11B15/43 ,  G11B15/62 ,  G11B5/58 ,  G11B15/60 ,  G11B5/31 ,  G11B5/187 ,  G11B5/40 ,  G11B5/39

CPC classification number: G11B5/255 ,  G11B5/008 ,  G11B5/00813 ,  G11B5/1871 ,  G11B5/3906 ,  G11B5/581 ,  G11B15/43 ,  G11B15/60 ,  G11B15/605 ,  G11B15/62

Abstract: An apparatus includes a module having a tape bearing surface, a first edge, and a second edge, where a first tape tenting region of the tape bearing surface extends from the first edge toward the second edge, and a second tape tenting region of the tape bearing surface extends from the second edge toward the first edge. A first guide is positioned for inducing a first tenting of a moving magnetic recording tape above the first tape tenting region, and a second guide is positioned for inducing a second tenting of the moving magnetic recording tape above the second tape tenting region. A sensor is located in a thin film region of the module. The sensor has a free layer. The sensor is positioned between the first tape tenting region and the second tape tenting region of the tape bearing surface.

公开(公告)号：US09761270B1

公开(公告)日：2017-09-12

申请号：US15386153

申请日：2016-12-21

Applicant: Seagate Technology LLC

Inventor： Shi Jung Kim ,  Ju Yong Lee ,  YoungJin Son

IPC: G11B20/18 ,  G11B5/596 ,  G11B5/54 ,  G11B15/68 ,  G11B5/58 ,  G11B27/36 ,  G11B19/00

CPC classification number: G11B5/6076 ,  G11B5/54 ,  G11B5/581 ,  G11B5/59627 ,  G11B5/59633 ,  G11B5/59638 ,  G11B5/607 ,  G11B15/6895 ,  G11B19/00 ,  G11B27/36

Abstract: A data storage device may have increased signal-to-noise ratio contact detection by employing a transducing head associated with a data storage medium each connected to a controller. The transducing head can have an alternating current heater excited to a first frequency for a first revolution of the data storage medium and to a different second frequency for a second revolution of the data storage medium. The second frequency may produce lateral transducing head motion as a result of physical contact of the transducing head with the data storage medium. The controller can issue a contact status in response to comparing a first plurality of position error signals logged during the first frequency to a second plurality of position error signals logged during the second frequency.

公开(公告)号：US09460741B1

公开(公告)日：2016-10-04

申请号：US14862937

申请日：2015-09-23

Applicant: Seagate Technology LLC

Inventor： Jon D. Trantham ,  Tim Rausch ,  Jason C. Jury

IPC: G11B5/02 ,  G11B5/58 ,  G11B5/012 ,  G11B5/00 ,  G11B20/12 ,  G11B5/39

CPC classification number: G11B5/581 ,  G11B5/012 ,  G11B5/02 ,  G11B5/3945 ,  G11B5/397 ,  G11B5/4826 ,  G11B5/4886 ,  G11B2005/0021 ,  G11B2020/1292 ,  G11B2020/1298

Abstract: Two or more reader sensors are commonly mounted on a read/write head that is configured to read data from a heat-assisted recording medium. For a region of the recording medium, a separation is determined for the reader sensors. A track spacing that provides a target areal density for the region is determined. The track spacing for the region is adjusted to approach a predetermined ratio of the separation.

Abstract translation: 两个或多个读取器传感器通常安装在读/写头上，读/写头被配置为从热辅助记录介质读取数据。 对于记录介质的区域，确定读取器传感器的分离。 确定提供区域的目标区域密度的轨道间距。 调整该区域的轨道间距以接近预定比例的分离。

公开(公告)号：US20150255110A1

公开(公告)日：2015-09-10

申请号：US14552559

申请日：2014-11-25

Applicant: International Business Machines Corporation

Inventor： Robert G. Biskeborn ,  Calvin S. Lo ,  Tak H. Wong ,  Xu Yan

IPC: G11B20/10 ,  G11B5/58 ,  G11B27/36

CPC classification number: G11B5/60 ,  G11B5/00813 ,  G11B5/02 ,  G11B5/455 ,  G11B5/581 ,  G11B20/10305 ,  G11B20/10388 ,  G11B20/10472 ,  G11B20/18 ,  G11B27/36

Abstract: A supplemental module that includes one or more read elements periodically engages a magnetic recording medium, and the read elements generate an electrical signal corresponding to transitions written to the magnetic recording medium by a write element. A computer receives information representative of the electrical signal and determines if a quality metric of the magnetic recording medium derived from the electrical signal is within a defined range. If the quality metric is not within the defined range, a defined action is performed by the computer.

Abstract translation: 包括一个或多个读取元件的补充模块周期性地接合磁记录介质，并且读取元件产生对应于由写入元件写入到磁记录介质的转变的电信号。 计算机接收表示电信号的信息，并确定从电信号导出的磁记录介质的质量度量是否在限定范围内。 如果质量度量不在定义的范围内，则由计算机执行定义的动作。

公开(公告)号：US20100232055A1

公开(公告)日：2010-09-16

申请号：US12588333

申请日：2009-10-13

Applicant: Sung-chul Lee ,  Hyung-soon Shin ,  Seung-jun Lee ,  Sun-ae Seo ,  Young-jin Cho ,  Ung-hwan Pi ,  Ji-young Bae ,  Jin-seong Heo

Inventor： Sung-chul Lee ,  Hyung-soon Shin ,  Seung-jun Lee ,  Sun-ae Seo ,  Young-jin Cho ,  Ung-hwan Pi ,  Ji-young Bae ,  Jin-seong Heo

IPC: G11B5/58

CPC classification number: G11B5/584 ,  G11B5/581 ,  G11C11/161 ,  G11C11/1673 ,  G11C11/1675

Abstract: An information storage device includes a magnetic structure having a buffer track and a plurality of storage tracks connected to the buffer track. A write/read unit is disposed on the magnetic structure, and a plurality of switching devices are respectively connected to the buffer track, the plurality of storage tracks, and the write/read unit. The switching devices that are respectively connected to the buffer track and the storage tracks. The information storage device further includes a circuit configured to supply current to at least one of the magnetic structure and the write/read unit.

Abstract translation: 信息存储装置包括具有缓冲轨道和连接到缓冲轨迹的多个存储轨道的磁结构。 写/读单元设置在磁结构上，并且多个开关装置分别连接到缓冲磁道，多个存储磁道和写/读单元。 分别连接到缓冲器轨道和存储轨道的开关装置。 信息存储装置还包括被配置为向磁结构和写入/读取单元中的至少一个提供电流的电路。

公开(公告)号：US07595959B2

公开(公告)日：2009-09-29

申请号：US11170035

申请日：2005-06-29

Applicant: Mark William Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Kevin Minor

Inventor： Mark William Covington ,  Ganping Ju ,  Werner Scholz ,  Michael Kevin Minor

IPC: G11B5/127

CPC classification number: G11B5/667 ,  G11B5/1278 ,  G11B5/581 ,  G11B5/6005 ,  Y10T428/115 ,  Y10T428/1186

Abstract: A magnetic recording system is disclosed in which the magnetization dynamics of the write head and recording medium are highly damped. The system may comprise a perpendicular recording head having a write pole, and a recording medium including a hard magnetic recording layer and a soft magnetic underlayer (SUL). The increased magnetic damping in the write pole and SUL suppresses precessional motion of the respective magnetizations, leading to a reduction in transition jitter caused by spurious head field fluctuations. The damping may be increased by providing films or multilayer structures that are doped with rare earth or transition metal elements. Exchange coupled laminates of doped and undoped layers may optimize both the effective damping and write field in the recording system.

Abstract translation: 公开了一种磁记录系统，其中写头和记录介质的磁化动力学被高度阻尼。 该系统可以包括具有写入极的垂直记录头和包括硬磁记录层和软磁性底层（SUL）的记录介质。 写入磁极和SUL中的增加的磁阻抑制了相应磁化的进动运动，导致由杂散磁头场波动引起的转换抖动的减小。 可以通过提供掺杂有稀土或过渡金属元素的膜或多层结构来增加阻尼。 掺杂和未掺杂层的交换耦合层压板可以优化记录系统中的有效阻尼和写入场。