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    BIMODAL MODULATION
    3.
    发明申请
    BIMODAL MODULATION 有权

    公开(公告)号：US20180130493A1

    公开(公告)日：2018-05-10

    申请号：US15694387

    申请日：2017-09-01

    申请人： Seagate Technology, LLC

    发明人： Vijay Kumar ,  Narayanan Ramakrishnan

    IPC分类号： G11B20/10 ,  G11B5/48 ,  G11B5/55

    CPC分类号： G11B20/10268 ,  G11B5/4826 ,  G11B5/483 ,  G11B5/5552 ,  G11B5/5573

    摘要： Apparatus and method contemplating an in-situ test method for a head gimbal assembly (HGA). The method includes individually exciting a pair of opposing-effect microactuators supporting the read/write head adjacent a data storage media; summing the outputs from the microactuators to derive a spectral frequency response of the HGA; determining a resonant frequency from the spectral frequency response; driving the microactuators at the resonant frequency; and varying the read/write fly height apart from the data storage media to correlate contact with a maximum response of the microactuators.

    Suspension having a stacked D33 mode PZT actuator with constraint layer
    5.
    发明授权
    Suspension having a stacked D33 mode PZT actuator with constraint layer 有权

    公开(公告)号：US09786831B1

    公开(公告)日：2017-10-10

    申请号：US15402230

    申请日：2017-01-09

    申请人： Magnecomp Corporation

    发明人： Kuen Chee Ee

    IPC分类号： G11B5/48 ,  H01L41/09 ,  H01L41/083 ,  H01L41/187 ,  H01L41/047 ,  G11B5/55

    CPC分类号： G11B5/5552 ,  G11B5/4833 ,  G11B5/4873 ,  H01L41/047 ,  H01L41/0986 ,  H02N2/02

    摘要： A microactuator for a dual stage actuated suspension for a hard disk drive is constructed as a longitudinal stack of piezoelectric (PZT) elements acting in the d33 mode, expanding or contracting longitudinally when an electric field is applied across them in the longitudinal direction. The microactuator has interlaced electrode fingers that separate and define the individual PZT elements, and apply the electric field. A stiff constraint layer having a high Young's modulus is affixed to the microactuator on the side opposite the suspension to which the microactuator is bonded. The constraint layer may be a layer of substantially inactive PZT material that is formed integrally with the PZT elements but without electrodes in the inactive PZT layer. The presence of the stiff constraint layer increases the effective stroke length of the microactuator.

    Integrated recording head with selective movement
    6.
    发明授权
    Integrated recording head with selective movement 有权

    公开(公告)号：US09659594B2

    公开(公告)日：2017-05-23

    申请号：US13776921

    申请日：2013-02-26

    申请人： Dallas W. Meyer

    发明人： Dallas W. Meyer

    IPC分类号： G11B21/21 ,  G11B5/56 ,  G11B5/58 ,  G11B5/48 ,  G11B5/55 ,  G11B5/592

    CPC分类号： G11B21/21 ,  G11B5/48 ,  G11B5/4826 ,  G11B5/4873 ,  G11B5/5552 ,  G11B5/58

    摘要： In one example, a head is provided that may include a slider body, a transducer body, a transducer connected to the transducer body, and an interleaver assembly interconnecting the slider body and the transducer body. The interleaver assembly may include an interleaver body to which the transducer body is attached, the interleaver body having a plurality of geometric features that enable temporary deformation of the interleaver body in response to exertion of a force on the interleaver body, and the interleaver body may further include piezoelectric elements positioned in the interleaver body, the piezoelectric elements operable such that, when selectively actuated, the piezoelectric elements exert a force on the interleaver body so as to effect selective movement of the transducer with respect to a surface of a medium.

    Piezoelectric disk drive suspension motors having plated stiffeners
    8.
    发明授权
    Piezoelectric disk drive suspension motors having plated stiffeners 有权
    具有电镀加强件的压电盘驱动悬架马达

    公开(公告)号：US09558771B2

    公开(公告)日：2017-01-31

    申请号：US14719521

    申请日：2015-05-22

    申请人： Hutchinson Technology Incorporated

    发明人： Jacob D. Bjorstrom

    IPC分类号： G11B5/48 ,  G11B5/55

    CPC分类号： G11B5/483 ,  G11B5/4826 ,  G11B5/4833 ,  G11B5/4853 ,  G11B5/4873 ,  G11B5/5552

    摘要： Various embodiments concern a gimbaled flexure having a dual stage actuation structure. The flexure comprises a gimbal on which a motor is mounted. The motor comprises a first terminal, one or more layers of piezoelectric material, and a metal stiffener disposed directly on the first terminal. The stiffener comprises a layer of metal defining a majority of a top side of the motor. The first terminal can be gold sputtered on the piezoelectric material while the stiffener can be nickel plated on the gold. The stiffener can cause the motor, and the flexure on which it is mounted, to curl upon electrical activation of the motor.

    摘要翻译： 各种实施例涉及具有双级致动结构的万向弯曲。 挠性件包括安装有马达的万向节。 电动机包括第一端子，一层或多层压电材料和直接设置在第一端子上的金属加强件。 加强件包括限定电动机的顶侧大部分的金属层。 第一个端子可以在压电材料上溅射金，而加强件可镀镍在金子上。 加强件可以使电动机及其安装的挠曲件在电动机的电活动时卷曲。

    BIMODAL MODULATION
    9.
    发明申请
    BIMODAL MODULATION 有权
    双模调制

    公开(公告)号：US20160217821A1

    公开(公告)日：2016-07-28

    申请号：US15012571

    申请日：2016-02-01

    申请人： SEAGATE TECHNOLOGY LLC

    发明人： Vijay Kumar ,  Narayanan Ramakrishnan

    IPC分类号： G11B20/10 ,  G11B5/48

    CPC分类号： G11B20/10268 ,  G11B5/4826 ,  G11B5/483 ,  G11B5/5552 ,  G11B5/5573

    摘要： An apparatus and associated method contemplating a head gimbal assembly (HGA) and a bridge circuit including first and second microactuators attached to the HGA. Computation logic is connected to the bridge circuit and configured to independently measure an electrical output of each microactuator and to sum the electrical outputs to derive a value related to a vertically dominant modulation mode of the HGA.

    摘要翻译： 一种考虑头部万向节组件（HGA）的装置和相关方法以及包括连接到HGA的第一和第二微致动器的桥接电路。 计算逻辑连接到桥式电路，并被配置为独立地测量每个微型致动器的电输出，并且对电气输出求和以得到与HGA的垂直主导调制模式相关的值。

    MULTILAYER DISK DRIVE MOTORS HAVING OUT-OF-PLANE BENDING
    10.
    发明申请
    MULTILAYER DISK DRIVE MOTORS HAVING OUT-OF-PLANE BENDING 有权
    具有超平面弯曲的多层驱动电机

    公开(公告)号：US20160196843A1

    公开(公告)日：2016-07-07

    申请号：US15071762

    申请日：2016-03-16

    申请人： Hutchinson Technology Incorporated

    发明人： Jacob D. Bjorstrom ,  Ryan N. Ruzicka ,  Joseph C. Wheatley

    IPC分类号： G11B5/48

    CPC分类号： G11B5/483 ,  G11B5/4826 ,  G11B5/4833 ,  G11B5/4853 ,  G11B5/4873 ,  G11B5/5552

    摘要： Various embodiments concern a gimbaled flexure having a dual stage actuation structure. The flexure comprises a gimbal on which a motor is mounted. The motor comprises a first and second terminals and a plurality of actuator layers formed from a piezoelectric material. The plurality of actuator layers comprise serially stacked first, second, and third actuator layers. The plurality of actuator layers are respectively poled and connected to the first and second terminals such that both of the first and second actuator layers expand while the third actuator layer contracts in response to application of a signal across the first and second terminals. The differential motion of the plurality of layers in the motor cause the motor to curl about the contracting third actuator layer. The curling motion causes a portion of the flexure to preferentially curl.

    摘要翻译： 各种实施例涉及具有双级致动结构的万向弯曲。 挠性件包括安装有马达的万向节。 马达包括第一和第二端子以及由压电材料形成的多个致动器层。 多个致动器层包括串联堆叠的第一，第二和第三致动器层。 多个致动器层分别极化并连接到第一和第二端子，使得响应于跨越第一和第二端子的信号的施加，第一致动器层和第二致动器层两者都膨胀而第三致动器层收缩。 马达中的多个层的差动运动导致马达围绕收缩的第三致动器层卷曲。 卷曲运动导致弯曲部分优先卷曲。