公开(公告)号：US6128153A

公开(公告)日：2000-10-03

申请号：US805161

申请日：1997-02-24

申请人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

发明人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Tomoyoshi Yamada ,  Takahisa Ueno ,  Nobuyuki Suzuki ,  Keiji Aruga ,  Shuichi Hashimoto

IPC分类号： G11B21/10 ,  G11B5/596

CPC分类号： G11B5/59627

摘要： Head position control is implemented in a disk drive for the case in which a disk is assembled into the disk drive after a precise track is recorded onto it using an external apparatus, which is capable of high-speed access even if there is eccentricity between a track defined by servo information and the center of rotation of the track. Two phase servo bursts consisting of servo information are recorded onto each of the servo information regions of a disk surface, in mutual alternation, the strength ratio between signals detected from these two phase servo bursts being used to determine to which side the head is displaced. By performing control so that this strength ratio is a prescribed value at each angular position, control is achieved so that the head moves along a circular path of rotation, even if there is eccentricity in the servo circular path defined by the recorded servo information with respect to the center of rotation.

摘要翻译： 在磁盘驱动器中实现磁头位置控制，其中在使用外部设备将精确磁道记录在其上之后将磁盘组装到磁盘驱动器中的情况下，其能够高速访问，即使在 由伺服信息定义的轨道和轨道的旋转中心。 由伺服信息组成的两相伺服脉冲串相互交替地记录在盘表面的每个伺服信息区域上，从这两个相位伺服脉冲串检测的信号之间的强度比用于确定磁头移位到哪一侧。 通过进行各个角度位置的强度比为规定值的控制，即使在由所记录的伺服信息确定的伺服圆形路径中存在偏心，也能够沿着圆形的旋转路径进行控制 到旋转中心。

公开(公告)号：US5995318A

公开(公告)日：1999-11-30

申请号：US821165

申请日：1997-03-20

申请人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Keiji Aruga ,  Shuichi Hashimoto ,  Kazuhiko Takaishi

发明人： Susumu Hasegawa ,  Yukihiro Uematsu ,  Keiji Aruga ,  Shuichi Hashimoto ,  Kazuhiko Takaishi

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10

CPC分类号： G11B5/59627 ,  G11B21/085 ,  G11B5/5547

摘要： Disclosed is a head positioning control system for disk drives which enables fast access even when eccentricities of tracks defined with servo control information relative to the center of rotation are different among disks assembled after the servo control information is externally written on the respective disks. The head positioning control system is adapted to a disk drive comprising a plurality of disks each having a record surface on which servo control information indicating positions in a radial direction on a disk is recorded, and heads associated with the plurality of disk record surfaces and designed to detect information stored on the plurality of disk record surfaces. The servo control information includes position information in the radial direction on each disk record surface and defines servo-control circular trajectories. In addition to known components, the head positioning control system includes an eccentric information memory for storing eccentric information concerning eccentricities of servo-control circular trajectories on disk record surfaces relative to the center of rotation, and an optimal processing unit that when object disk record surfaces are changed according to an instructed target address, executes processing, which requires the shortest time for accessing a target address, on the basis of eccentric information.

摘要翻译： 公开了一种用于盘驱动器的头定位控制系统，即使在伺服控制信息被外部写在各个盘上之后组装的盘之间，即使在由相对于旋转中心的伺服控制信息定义的轨道的偏心量不同的情况下也能够快速进入。 磁头定位控制系统适用于磁盘驱动器，磁盘驱动器包括多个磁盘，每个磁盘具有记录表面，伺服控制信息指示在盘上的径向方向上的位置，并且与多个磁盘记录表面相关联的磁头被设计 以检测存储在多个盘记录表面上的信息。 伺服控制信息包括每个磁盘记录表面上的径向位置信息，并且定义伺服控制圆形轨迹。 除了已知的部件之外，头部定位控制系统还包括偏心信息存储器，用于存储与磁盘记录表面相对于旋转中心的伺服控制圆形轨迹偏心的偏心信息，以及最佳处理单元，当对象盘记录表面 根据指示的目标地址而改变，基于偏心信息执行需要最短时间访问目标地址的处理。

公开(公告)号：US06327120B1

公开(公告)日：2001-12-04

申请号：US09057174

申请日：1998-04-08

申请人： Shinji Koganezawa ,  Toru Kohei ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

发明人： Shinji Koganezawa ,  Toru Kohei ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

IPC分类号： G11B2110

CPC分类号： G11B21/106 ,  G11B5/5552 ,  H01L41/0993

摘要： An actuator having a simple configuration requiring no high dimensional accuracy, high in positioning accuracy and low in cost, and a head-positioning mechanism using the actuator are disclosed. An actuator according to a first application comprises a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. An actuator according to a second application comprises a movable member arranged on a drive member including a shear-type piezoelectric element on a base member. The drive member includes a plurality of layers of piezoelectric elements polarized in alternately opposite directions perpendicular to the thickness of the devices. A plurality of conductive layers are formed adjacently to the respective layers of the devices to permit voltage application thereto. The movable member can be driven in parallel to the base member upon application of a voltage between the conductive layers. Any one of these actuators can be incorporated as a part of the head actuator to constitute a head-positioning mechanism capable of displacing the head by a minuscule distance independently of the operation of the head actuator.

公开(公告)号：US06538854B2

公开(公告)日：2003-03-25

申请号：US09872037

申请日：2001-06-01

申请人： Shinji Koganezawa ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

发明人： Shinji Koganezawa ,  Tomoyoshi Yamada ,  Yukihiro Uematsu ,  Tadayoshi Noguchi ,  Hisashi Nakano ,  Ryuma Sakamoto ,  Junichi Inoue ,  Tetsuya Suzuki

IPC分类号： G11B2110

CPC分类号： G11B21/106 ,  G11B5/5552 ,  H01L41/0993

摘要： An actuator includes a shear-type piezoelectric element of predetermined thickness and an opposed electrode formed on two electrodes in spaced relationship on a base member. The opposed electrode is displaced in accordance with the direction of polarization of the shear-type piezoelectric element upon applying a voltage between the two electrodes. The opposed electrode thus constitutes an operating section of the actuator. The actuator can be incorporated as a part of the head actuator to constitute a head-positioning mechanism capable of displacing the head by a minuscule distance independently of the operation of the head actuator.

摘要翻译： 致动器包括具有预定厚度的剪切型压电元件和在两个电极上形成的相对电极，在基底构件上间隔开。 相对的电极在施加两个电极之间的电压时根据剪切型压电元件的偏振方向移位。 因此，相对的电极构成致动器的操作部分。 致动器可以作为头部致动器的一部分并入，以构成头部定位机构，该头部定位机构能够独立于头部致动器的操作而使头部移动微小的距离。

公开(公告)号：US07095591B2

公开(公告)日：2006-08-22

申请号：US10643267

申请日：2003-08-19

申请人： Takahiro Imamura ,  Yukihiro Uematsu ,  Hitoshi Kanai ,  Shinji Koganezawa ,  Ryosuke Koishi ,  Takeaki Shimanouchi

发明人： Takahiro Imamura ,  Yukihiro Uematsu ,  Hitoshi Kanai ,  Shinji Koganezawa ,  Ryosuke Koishi ,  Takeaki Shimanouchi

IPC分类号： G11B5/60

CPC分类号： G11B5/5552 ,  G11B5/6082

摘要： A pair of slits are defined in a slider body of a head slider so as to extend from a trailing end surface to the leading end on the slider body. A movable block is established in the slider body between the slits. The slits ensure the extent of movement for the movable block. Elongated plates enable a relative displacement between the movable block and a stationary block. A head element is mounted on a trailing end surface of the movable block. The thickness of a non-magnetic layer corresponds to the gap length of the head element. The gap length of the head element can easily be controlled based on deposition of the non-magnetic layer. The thickness of the non-magnetic layer can be reduced in a relatively facilitated manner, so that the gap length of the head element can easily be minimized.

摘要翻译： 一个狭缝被限定在头部滑动件的滑块体中，以便从滑动件主体的后端表面延伸到前端。 在滑块体之间在狭缝之间建立可动块。 狭缝确保可移动块的移动程度。 细长的板使得可移动块和固定块之间的相对位移。 头元件安装在可移动块的后端表面上。 非磁性层的厚度对应于头元件的间隙长度。 基于非磁性层的沉积可以容易地控制头元件的间隙长度。 可以以相对便利的方式减小非磁性层的厚度，使得头元件的间隙长度可以容易地最小化。