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    Data storage device optimization based on adjacent track interference
    41.
    发明授权
    Data storage device optimization based on adjacent track interference 有权
    基于相邻轨道干扰的数据存储设备优化

    公开(公告)号：US09502061B1

    公开(公告)日：2016-11-22

    申请号：US14846074

    申请日：2015-09-04

    Applicant: Seagate Technology LLC

    Inventor： Wenzhong Zhu ,  Alfredo Chu ,  SiewKin Chow

    IPC: G11B5/55 ,  G11B20/10 ,  G11B5/00

    CPC classification number: G11B5/5547 ,  G11B5/455 ,  G11B20/10453 ,  G11B2005/001 ,  G11B2005/0021 ,  G11B2220/2525

    Abstract: Systems, devices, processes, and methods of optimizing a data storage device based on adjacent track interference (ATI) are presented. ATI can be detected by writing a specific track of a disc a number of times and measuring a bit error rate (BER) of an adjacent track. In addition, more accurate in-field simulations of ATI can be achieved by seeking to another track, such as an adjacent track, in-between each write to the specific track. Further, in a heat-assisted magnetic recording (HAMR) device, a laser bias control can be implemented during at least one of the seeks to calibrate a laser in-between each write. Even further, the seeks may be anticipatory track seeks (ATS).

    Abstract translation: 提出了基于相邻轨道干扰（ATI）优化数据存储设备的系统，设备，过程和方法。 可以通过多次写入盘的特定轨道并测量相邻轨道的误码率（BER）来检测ATI。 此外，可以通过在每次写入特定轨道之间寻找另一轨道（例如相邻轨道）来实现ATI的更准确的现场模拟。 此外，在热辅助磁记录（HAMR）装置中，可以在寻求在每次写入之间校准激光的至少一个中实现激光偏置控制。 此外，寻求可能是预期的追踪追踪（ATS）。

    HEAT ASSISTED MAGNETIC RECORDING FOR BIT-PATTERNED MEDIA
    44.
    发明申请
    HEAT ASSISTED MAGNETIC RECORDING FOR BIT-PATTERNED MEDIA 有权
    用于位图形媒体的热辅助磁记录

    公开(公告)号：US20160148635A1

    公开(公告)日：2016-05-26

    申请号：US14734235

    申请日：2015-06-09

    Applicant: Seagate Technology LLC

    Inventor： Wenzhong Zhu ,  Kaizhong Gao ,  Edward Gage

    IPC: G11B7/1263 ,  G11B5/74 ,  G11B5/09

    CPC classification number: G11B7/1263 ,  G11B5/012 ,  G11B5/09 ,  G11B5/746 ,  G11B2005/0021 ,  G11B2220/252

    Abstract: A heat-assisted magnetic recording (HAMR) device includes a controller that selects a power for operating a heat source for a data write to a target data track. According to one implementation, the controller selects the power based on an assessment of whether the target data track is bounded by any data-storing tracks. A first power is selected when the data track is not bounded by any data-storing tracks and a second lower power is selected when the data track is bounded by one or more data-storing tracks. In another implementation, the controller writes to different partitioned regions of a storage media with different powers of the heat source. The controller selects a storage location for data based on an expected write error rate and environmental conditions within the HAMR device.

    Abstract translation: 热辅助磁记录（HAMR）装置包括控制器，其选择用于操作热源以用于对目标数据轨道进行数据写入的功率。 根据一个实施方案，控制器基于对目标数据轨道是否由任何数据存储轨道限定的评估来选择功率。 当数据轨道不被任何数据存储轨道限制时，选择第一功率，并且当数据轨道由一个或多个数据存储轨道限定时选择第二较低功率。 在另一实现中，控制器向不同功率的热源的存储介质写入不同的分区。 控制器根据预期的写错误率和HAMR设备内的环境条件选择数据的存储位置。

    STRAM with composite free magnetic element
    46.
    发明授权
    STRAM with composite free magnetic element 失效
    STRAM与复合自由磁性元件

    公开(公告)号：US08681539B2

    公开(公告)日：2014-03-25

    申请号：US13862611

    申请日：2013-04-15

    Applicant: Seagate Technology LLC

    Inventor： Yuankai Zheng ,  Dimitar V. Dimitrov ,  Dexin Wang ,  Haiwen Xi ,  Kaizhong Gao ,  Olle Heinonen ,  Wenzhong Zhu

    IPC: G11C11/00

    CPC classification number: G11C11/1675 ,  B82Y10/00 ,  B82Y25/00 ,  G11C11/16 ,  G11C11/161 ,  H01F10/3254 ,  H01F10/3268 ,  H01F10/3286 ,  H01F10/329 ,  H01L43/08

    Abstract: Spin-transfer torque memory includes a composite free magnetic element, a reference magnetic element having a magnetization orientation that is pinned in a reference direction, and an electrically insulating and non-magnetic tunneling barrier layer separating the composite free magnetic element from the magnetic reference element. The free magnetic element includes a hard magnetic layer exchanged coupled to a soft magnetic layer. The composite free magnetic element has a magnetization orientation that can change direction due to spin-torque transfer when a write current passes through the spin-transfer torque memory unit.

    Abstract translation: 自旋转矩存储器包括复合自由磁性元件，具有沿参考方向固定的磁化取向的参考磁性元件以及将复合自由磁性元件与磁性参考元件分离的电绝缘和非磁性隧道势垒层 。 自由磁性元件包括与软磁性层交换的硬磁性层。 复合自由磁性元件具有当写入电流通过自旋转移转矩存储单元时由于自旋转矩传递而改变方向的磁化取向。

    Data updating in non-volatile memory
    47.
    发明授权
    Data updating in non-volatile memory 有权

    公开(公告)号：US10684778B2

    公开(公告)日：2020-06-16

    申请号：US14846411

    申请日：2015-09-04

    Applicant: Seagate Technology LLC

    Inventor： Yiran Chen ,  Hai Li ,  Wenzhong Zhu ,  Xiaobin Wang ,  Yuan Yan ,  Harry Hongyue Liu

    IPC: G06F3/06 ,  G06F12/02

    Abstract: Various embodiments of the present invention are generally directed to an apparatus and associated method for updating data in a non-volatile memory array. In accordance with some embodiments, a memory block is formed with a plurality of types of memory cell sectors arranged in data pages of a first type and log pages of a second type that can be updated in-place. A first updated sector is written to a first log page while maintaining an outdated sector in an original data page, and overwritten with a second updated sector.

    Laser bias current control
    50.
    发明授权
    Laser bias current control 有权

    公开(公告)号：US09916850B1

    公开(公告)日：2018-03-13

    申请号：US15375368

    申请日：2016-12-12

    Applicant: Seagate Technology LLC

    Inventor： Alfredo Sam Chu ,  Robert Matousek ,  Todd Michael Lammers ,  Thomas Lee Schick ,  Wenzhong Zhu

    IPC: G11B5/02 ,  G11B5/00 ,  G11B7/1263

    CPC classification number: G11B5/012 ,  G11B5/314 ,  G11B2005/0021

    Abstract: A preamplifier circuit can include a control line dedicated to receive a control signal that corresponds to indicating a specific register of the preamplifier circuit, which can allow the preamplifier to switch between utilizing two or more registers to control a current output of the preamplifier circuit. The preamplifier circuit may also have a serial input to program multiple registers of the preamplifier circuit in a serial fashion. In some embodiments, the current output may be a laser bias current. The preamplifier may adjust an output current that drives a laser emitter based on a control signal indicating which specific registers controls the output current. Further, a controller, such as a system-on-chip controller, may selectively vary the control signal to affect the current output of the preamplifier circuit. These systems and methods may be particularly useful for lasers and heat-assisted magnetic recording (HAMR).

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