公开(公告)号：US20080151418A1

公开(公告)日：2008-06-26

申请号：US11643154

申请日：2006-12-20

申请人： Paul Cisewski ,  Ryohheita Hattori ,  Kris Schouterden ,  Jerome Venneman

发明人： Paul Cisewski ,  Ryohheita Hattori ,  Kris Schouterden ,  Jerome Venneman

IPC分类号： G11B5/52

CPC分类号： G11B5/6064 ,  G11B5/607

摘要： Embodiments of the present invention pertain to a tradeoff between reliability and performance for a disk drive. According to one embodiment, a first measurement at a first thermal fly height control (TFC) heater level that provides low reliability for a parameter and a second measurement at a second TFC heater level that provides low performance for the parameter are determined. The first measurement and the second measurement are used to determine if there is a third TFC heater level that at least satisfies a criteria for the parameter whereby the tradeoff between the reliability and the performance for the disk drive is enabled.

摘要翻译： 本发明的实施例涉及磁盘驱动器的可靠性和性能之间的折衷。 根据一个实施例，确定在为参数提供低性能的第二TFC加热器级提供低参数可靠性和第二测量的第一热飞跃高度控制（TFC）加热器水平的第一测量。 第一测量和第二测量用于确定是否存在至少满足参数的标准的第三TFC加热器级别，从而使可靠性和磁盘驱动器的性能之间的折衷得以实现。

公开(公告)号：US07457072B2

公开(公告)日：2008-11-25

申请号：US11566678

申请日：2006-12-04

申请人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

发明人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

IPC分类号： G11B5/60 ,  G11B21/12

CPC分类号： G11B5/6064 ,  G11B5/3133 ,  G11B5/607

摘要： A disk drive has a head fly-height actuator wherein the head-disk spacing is controlled as a function of both the track, and the sector or sectors within the track, where data is to be read or written. The fly-height actuator may be a thermal actuator comprising a heater located on the slider near the read/write head. The fly-height controller (FHC) for the thermal actuator stores band control signal (BCS) values representative of heater power (Hp) to be applied to the thermal actuator when reading or writing to a data track in the associated band of tracks. The FHC also either calculates from a programmed equation or recalls sector control signal (SCS) values representative of an Hp increment to be applied to the thermal actuator depending on the sector or sectors where data is to be written. The FHC sums the appropriate SCS value with the appropriate BCS value to achieve the desired Hp, resulting in the optimal fly-height not only for the selected band but also for the selected sector or sectors.

摘要翻译： 磁盘驱动器具有头部飞行高度致动器，其中磁头 - 磁盘间隔被控制为跟踪轨道以及数据要被读取或写入的轨道内的扇区或扇区。 飞高致动器可以是包括位于读/写头附近的滑块上的加热器的热致动器。 用于热致动器的飞行高度控制器（FHC）存储表示加热器功率（Hp）的频带控制信号（BCS）值，当读取或写入相关的轨道带中的数据轨道时，加热器功率（Hp）被施加到热致动器。 FHC还根据编程的方程式或者根据要写入数据的扇区或扇区来计算表示要施加到热致动器的Hp增量的扇区控制信号（SCS）值。 FHC将适当的SCS值与适当的BCS值相加以实现所需的Hp，不仅对于所选频带而且对于所选择的扇区或扇区，都产生最佳飞高。

公开(公告)号：US20080158742A1

公开(公告)日：2008-07-03

申请号：US11647029

申请日：2006-12-27

申请人： Ryohheita Hattori ,  Naoki Kodama ,  Hiroyuki Suzuki

发明人： Ryohheita Hattori ,  Naoki Kodama ,  Hiroyuki Suzuki

IPC分类号： G11B5/33

CPC分类号： G11B5/6064 ,  G11B5/3136 ,  G11B5/3967 ,  G11B5/607

摘要： Embodiments of the present invention pertain to a magnetic head that includes negative expansion material. According to one embodiment, the magnetic head includes a read element, a substrate, and at least a partial layer of negative expansion material to control, at least in part, a fly height between an air bearing surface associated with the magnetic head and a disk surface. The material is manganese nitride based and non-insulating and the layer of negative expansion material is parallel to the substrate, according to one embodiment.

摘要翻译： 本发明的实施例涉及包括负膨胀材料的磁头。 根据一个实施例，磁头包括读取元件，基板以及至少部分负膨胀材料层，以至少部分地控制与磁头相关联的空气支承表面之间的飞行高度和盘 表面。 根据一个实施例，该材料是基于氮化锰的和非绝缘的，而负极膨胀材料层平行于衬底。

公开(公告)号：US20080130159A1

公开(公告)日：2008-06-05

申请号：US11566678

申请日：2006-12-04

申请人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

发明人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

IPC分类号： G11B21/02

CPC分类号： G11B5/6064 ,  G11B5/3133 ,  G11B5/607

摘要： A disk drive has a head fly-height actuator wherein the head-disk spacing is controlled as a function of both the track, and the sector or sectors within the track, where data is to be read or written. The fly-height actuator may be a thermal actuator comprising a heater located on the slider near the read/write head. The fly-height controller (FHC) for the thermal actuator stores band control signal (BCS) values representative of heater power (Hp) to be applied to the thermal actuator when reading or writing to a data track in the associated band of tracks. The FHC also either calculates from a programmed equation or recalls sector control signal (SCS) values representative of an Hp increment to be applied to the thermal actuator depending on the sector or sectors where data is to be written. The FHC sums the appropriate SCS value with the appropriate BCS value to achieve the desired Hp, resulting in the optimal fly-height not only for the selected band but also for the selected sector or sectors.

摘要翻译： 磁盘驱动器具有头部飞行高度致动器，其中磁头 - 磁盘间隔被控制为跟踪轨道以及数据要被读取或写入的轨道内的扇区或扇区。 飞高致动器可以是包括位于读/写头附近的滑块上的加热器的热致动器。 用于热致动器的飞行高度控制器（FHC）存储表示加热器功率（Hp）的频带控制信号（BCS）值，当读取或写入相关的轨道带中的数据轨道时，加热器功率（Hp）被施加到热致动器。 FHC还根据编程的方程式或者根据要写入数据的扇区或扇区来计算表示要施加到热致动器的Hp增量的扇区控制信号（SCS）值。 FHC将适当的SCS值与适当的BCS值相加以实现所需的Hp，不仅对于所选频带而且对于所选择的扇区或扇区，都产生最佳飞高。

公开(公告)号：US07692898B2

公开(公告)日：2010-04-06

申请号：US11647029

申请日：2006-12-27

申请人： Ryohheita Hattori ,  Naoki Kodama ,  Hiroyuki Suzuki

发明人： Ryohheita Hattori ,  Naoki Kodama ,  Hiroyuki Suzuki

IPC分类号： G11B5/31

CPC分类号： G11B5/6064 ,  G11B5/3136 ,  G11B5/3967 ,  G11B5/607

摘要： Embodiments of the present invention pertain to a magnetic head that includes negative expansion material. According to one embodiment, the magnetic head includes a read element, a substrate, and at least a partial layer of negative expansion material to control, at least in part, a fly height between an air bearing surface associated with the magnetic head and a disk surface. The material is manganese nitride based and non-insulating and the layer of negative expansion material is parallel to the substrate, according to one embodiment.

摘要翻译： 本发明的实施例涉及包括负膨胀材料的磁头。 根据一个实施例，磁头包括读取元件，基板以及至少部分负膨胀材料层，以至少部分地控制与磁头相关联的空气支承表面之间的飞行高度和盘 表面。 根据一个实施例，该材料是基于氮化锰的和非绝缘的，而负极膨胀材料层平行于衬底。

公开(公告)号：US08085489B2

公开(公告)日：2011-12-27

申请号：US12538039

申请日：2009-08-07

申请人： Ryohheita Hattori ,  Masaki Yoshioka ,  Suthasun Thambirajah ,  Minoru Hashimoto ,  Kei Yasuna

发明人： Ryohheita Hattori ,  Masaki Yoshioka ,  Suthasun Thambirajah ,  Minoru Hashimoto ,  Kei Yasuna

IPC分类号： G11B21/02 ,  G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59638 ,  G11B5/59666 ,  G11B5/59688

摘要： A method for writing servo patterns onto a disk of a disk drive. The method includes providing a plurality of different drive currents for an actuator while pushing the actuator into a crash stop defining a swing range of the actuator. The method also includes performing a write operation for at least one of the plurality of different drive currents to write a plurality of servo pattern tracks including a plurality of separate servo pattern sectors. Furthermore, the method includes gradually changing a drive current of the plurality of different drive currents while pushing the actuator into the crash stop so as to gradually move a read element in searching for a servo pattern track to a radial position different from a radial position of the write element. Moreover, the method includes positioning the read element at one of the plurality of servo pattern tracks.

摘要翻译： 一种将伺服模式写入磁盘驱动器的磁盘上的方法。 该方法包括为致动器提供多个不同的驱动电流，同时将致动器推动到限定致动器的摆动范围的紧急停止。 该方法还包括对多个不同驱动电流中的至少一个进行写入操作以写入包括多个分离的伺服模式扇区的多个伺服模式轨道。 此外，该方法包括逐渐改变多个不同驱动电流的驱动电流，同时将致动器推入紧急停止状态，以便逐渐移动读取元件以搜索伺服模式轨迹到与径向位置不同的径向位置 写元素。 此外，该方法包括将读取元件定位在多个伺服模式轨迹中的一个上。

公开(公告)号：US08023220B2

公开(公告)日：2011-09-20

申请号：US12545773

申请日：2009-08-21

申请人： Masaki Yoshioka ,  Kei Yasuna ,  Makoto Takase ,  Ryohheita Hattori

发明人： Masaki Yoshioka ,  Kei Yasuna ,  Makoto Takase ,  Ryohheita Hattori

IPC分类号： G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59672

摘要： A method for writing servo sector sets that include a plurality of separate servo sectors on a disk so that servo sectors are present at same circumferential positions but different radial positions. The method includes reading a first servo sector set in a track with a read element such that the track includes first, second and third servo sector sets. The method also includes writing the third servo sector set with a write element at a different radial position from the read element with positional control and timing control using the first servo sector set while skipping the second servo sector set if all servo sectors of the first servo sector set are non-defective. Moreover, the method includes using positional control and timing control using the second servo sector set in the writing of the third servo sector set if the first servo sector set includes a defective servo sector.

摘要翻译： 一种用于在盘上写入包括多个单独的伺服扇区的伺服扇区组的方法，使得伺服扇区存在于相同的圆周位置但不同的径向位置。 该方法包括读取具有读取元件的轨道中设置的第一伺服扇区，使得轨道包括第一，第二和第三伺服扇区组。 该方法还包括：如果第一伺服系统的所有伺服扇区都是跳过第二伺服扇区组，则使用第一伺服扇区集进行位置控制和定时控制，将具有写元件的第三伺服扇区集合写入与读单元不同的径向位置 扇区集无缺陷。 此外，该方法包括如果第一伺服扇区集合包括有缺陷的伺服扇区，则使用在第三伺服扇区集合的写入中设置的第二伺服扇区的位置控制和定时控制。

公开(公告)号：US20110080672A1

公开(公告)日：2011-04-07

申请号：US12545773

申请日：2009-08-21

申请人： Masaki Yoshioka ,  Kei Yasuna ,  Makoto Takase ,  Ryohheita Hattori

发明人： Masaki Yoshioka ,  Kei Yasuna ,  Makoto Takase ,  Ryohheita Hattori

IPC分类号： G11B5/596

CPC分类号： G11B5/59633 ,  G11B5/59672

摘要： A method for writing servo sector sets that include a plurality of separate servo sectors on a disk so that servo sectors are present at same circumferential positions but different radial positions. The method includes reading a first servo sector set in a track with a read element such that the track includes first, second and third servo sector sets. The method also includes writing the third servo sector set with a write element at a different radial position from the read element with positional control and timing control using the first servo sector set while skipping the second servo sector set if all servo sectors of the first servo sector set are non-defective. Moreover, the method includes using positional control and timing control using the second servo sector set in the writing of the third servo sector set if the first servo sector set includes a defective servo sector.

摘要翻译： 一种用于在盘上写入包括多个单独的伺服扇区的伺服扇区组的方法，使得伺服扇区存在于相同的圆周位置但不同的径向位置。 该方法包括读取具有读取元件的轨道中设置的第一伺服扇区，使得轨道包括第一，第二和第三伺服扇区组。 该方法还包括：如果第一伺服系统的所有伺服扇区都是跳过第二伺服扇区组，则使用第一伺服扇区集进行位置控制和定时控制，将具有写元件的第三伺服扇区集合写入与读单元不同的径向位置 扇区集无缺陷。 此外，该方法包括如果第一伺服扇区集合包括有缺陷的伺服扇区，则使用在第三伺服扇区集合的写入中设置的第二伺服扇区的位置控制和定时控制。

公开(公告)号：US07375914B1

公开(公告)日：2008-05-20

申请号：US11679794

申请日：2007-02-27

申请人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

发明人： Roel Dieron ,  Ryohheita Hattori ,  Satyajit Neelkanth Patwardhan ,  Christopher David Wiederholt

IPC分类号： G11B21/02

CPC分类号： G11B5/40 ,  G11B5/3133 ,  G11B5/5547 ,  G11B5/6064 ,  G11B5/607

摘要： A disk drive has a resistive heater located near the read/write head as a thermal fly-height actuator and uses an improved method for operating the fly-height actuator. As part of the method, the heater may be deactivated during a seek to minimize the risk of head-disk contacts. When a write command is received, a level of heater power is applied to pre-heat the write head prior to writing the initial data sectors. This pre-heating heater power level may be higher than the power level used for writing. Then when writing commences, the lower power level is applied to the heater so the write head has the optimal head-disk spacing during the writing of all the data sectors, including the initial data sectors. Even though the heater may be deactivated during the seek the controller can initiate pre-heating during the last portion of the seek before the write head has reached the target track.

摘要翻译： 磁盘驱动器具有位于读/写头附近的电阻加热器作为热飞高高度致动器，并且使用改进的方法来操作飞高致动器。 作为该方法的一部分，在寻求磁头接触的风险最小化的过程中，加热器可以被去激活。 当接收到写入命令时，在写入初始数据扇区之前，施加一定程度的加热器功率来预加热写入头。 该预热加热器功率电平可能高于用于写入的功率电平。 然后当写入开始时，较低的功率电平被施加到加热器，使得写头在写入包括初始数据扇区的所有数据扇区期间具有最佳的头盘间隔。 即使在寻求期间加热器可以被去激活，在写入头已到达目标轨道之前，控制器可以在寻求的最后部分期间启动预热。