公开(公告)号：US09251829B2

公开(公告)日：2016-02-02

申请号：US13317402

申请日：2011-10-17

申请人： Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

发明人： Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

IPC分类号： G11B5/60 ,  G11B27/36

CPC分类号： G11B5/607 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/6076 ,  G11B27/36 ,  G11B2220/2516

摘要： Dynamic fly height (DFH) controlled read/write heads using multiple heaters have their heater powers set within a range of ratios that allows minimum clearances to be set between the read-gap and the write-gap and the surface of a disk, thereby providing improved touch-down detection. Determining the correct range of power ratios requires varying the ratio to create an adjustable protrusion profile for the read and write elements in the head and measuring values of the ratio and corresponding values of read gap and write gap clearances that create points of minimum clearance. By adjusting the ratio of power supplied to the heaters, different protrusion profiles can be produced, clearance control for sigma reduction can be obtained and read/write readiness and operation consistency and reliability can be improved.

公开(公告)号：US20130094104A1

公开(公告)日：2013-04-18

申请号：US13317402

申请日：2011-10-17

申请人： Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

发明人： Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

IPC分类号： G11B21/12 ,  G11B27/36

CPC分类号： G11B5/607 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/6076 ,  G11B27/36 ,  G11B2220/2516

摘要： Dynamic fly height (DFH) controlled read/write heads using multiple heaters have their heater powers set within a range of ratios that allows minimum clearances to be set between the read-gap and the write-gap and the surface of a disk, thereby providing improved touch-down detection. Determining the correct range of power ratios requires varying the ratio to create an adjustable protrusion profile for the read and write elements in the head and measuring values of the ratio and corresponding values of read gap and write gap clearances that create points of minimum clearance. By adjusting the ratio of power supplied to the heaters, different protrusion profiles can be produced, clearance control for sigma reduction can be obtained and read/write readiness and operation consistency and reliability can be improved.

摘要翻译： 使用多个加热器的动态飞行高度（DFH）控制的读/写头使其加热器功率设置在允许在读取间隙和写入间隙和盘表面之间设置最小间隙的比例范围内，从而提供 改进的触屏检测。 确定功率比的正确范围需要改变比率以为头部中的读取和写入元件创建可调节的突出轮廓，并且测量值的比值以及产生最小间隙点的读取间隙和写入间隙的相应值。 通过调节供给加热器的功率比，可以产生不同的突起轮廓，可以获得用于sigma降低的间隙控制，并且可以提高读/写准备和操作的一致性和可靠性。

公开(公告)号：US08767339B2

公开(公告)日：2014-07-01

申请号：US13424640

申请日：2012-03-20

申请人： Qinghua Zeng ,  Ellis Cha

发明人： Qinghua Zeng ,  Ellis Cha

IPC分类号： G11B21/02 ,  G11B5/60

CPC分类号： G11B5/607 ,  G11B5/4555 ,  G11B5/6076

摘要： A method to compensate for spacing variations between a dynamic fly height (DFH) controlled read/write head and a rotating disk surface. Using a HDI sensor or equivalent indicator of touchdowns, a power profile is calculated for an arbitrary track on a disk. The profile tracks disk topography by recording touchdown power at each of a series of sectors into which the track is subdivided. The resulting power profile, smoothed and expressed as a function of sector position, substitutes for the usual constant TD power setting that provides only an uncompensated range of spacing variations. A fixed back-off spacing power is added to the power profile enabling the head to fly over the track at a constant spacing. The power profile can be calculated to account for various temperature and pressure conditions.

摘要翻译： 一种用于补偿动态飞行高度（DFH）控制的读/写头和旋转盘表面之间的间距变化的方法。 使用HDI传感器或触地得分的等效指示符，计算磁盘上任意轨道的功率曲线。 轮廓通过在轨道被细分的一系列扇区中的每一个记录触地功率来跟踪盘形地形。 所得到的功率曲线，平滑并且表示为扇区位置的函数，代替通常的恒定TD功率设置，其仅提供无补偿的间隔变化范围。 固定的后退间距功率被添加到功率轮廓中，使得头以恒定的间距飞越轨道。 功率曲线可以计算出各种温度和压力条件。

公开(公告)号：US20110299196A1

公开(公告)日：2011-12-08

申请号：US13136914

申请日：2011-08-15

申请人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

发明人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

IPC分类号： G11B21/16

CPC分类号： G11B5/4826

摘要： Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.

摘要翻译： 提供了云台设计，可以最大程度地降低HDD悬架的不利动态性能，特别是在磁头 - 磁盘接口（HDI）交互之后。 在这种HDI相互作用之后，万向节安装的滑块的振动模式的图形表示可以看出操作性能的改善。 每个万向节设计包括斜坡限制器，其形成为通过一个或两个横向杆连接的两个分离的臂，以及减轻应力并最小程度地接触这些杆的导电迹线的布线。

公开(公告)号：US08717702B2

公开(公告)日：2014-05-06

申请号：US13424617

申请日：2012-03-20

申请人： Qinghua Zeng ,  Ellis Cha ,  Soramany Ka

发明人： Qinghua Zeng ,  Ellis Cha ,  Soramany Ka

IPC分类号： G11B21/02

CPC分类号： G11B5/607 ,  G11B5/455 ,  G11B5/6076

摘要： A method for determining the surface distortions of a disk in a spin-stand or single or multiple disk hard disk drive (HDD) utilizing a DFH type write head. A stepwise power curve is supplied to the DFH head, the head is flown over a chosen track on the disk, and the high frequency signal from a HDI sensor is analyzed in order to determine the step of an initial touchdown power and the step of a complete touchdown power as a function of individual sectors in a sector subdivision along a chosen track. The HDI sensor signal is averaged within each step of the power curve between these two steps and a Ratio variable, Ratio=(Max. amplitude)/(RMS amplitude) is calculated for each step and is averaged over each rotation of the disk during the step.

摘要翻译： 一种用于使用DFH型写入头来确定旋转台或单个或多个盘式硬盘驱动器（HDD）中的盘的表面失真的方法。 向DFH头提供逐级功率曲线，头部在盘上的所选轨道上飞行，并且分析来自HDI传感器的高频信号，以便确定初始接地功率的步长和 作为沿着所选轨道的扇区细分中的​​各个扇区的功能的完全触地功率。 在这两个步骤之间的功率曲线的每个步长内对HDI传感器信号进行平均，并为每个步骤计算Ratio变量Ratio =（最大振幅）/（RMS幅度），并在 步。

公开(公告)号：US07701672B2

公开(公告)日：2010-04-20

申请号：US11454647

申请日：2006-06-16

申请人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

发明人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

IPC分类号： G11B5/48

CPC分类号： G11B5/4833 ,  G11B5/5582

摘要： A loadbeam is locally stiffened by either, 1. the addition of strategically placed extra material to the loadbeam, 2. not removing material during the etching process to form the loadbeam, or 3. special forming, by crimping or bending, at specific sites on the beam. The use of local stiffening, when placed about the loadbeam dimple or between the dimple and flexure attachment points, with or without additional damping, can significantly improve the dynamical response of the loadbeam and eliminate vibrational modes of a slider mounted on the loadbeam during HDI interactions with disk surface asperities during disk drive operation.

摘要翻译： 负载梁由以下两者局部加强：1.向负载梁添加策略性放置的额外材料，2.在蚀刻过程中不去除材料以形成载荷梁，或3.通过卷曲或弯曲在特定位置上进行特殊成形 梁。 使用局部加强，当放置在负载梁凹坑下方，或者在凹坑和挠曲附着点之间，在有或没有附加阻尼的情况下，可以显着改善载荷梁的动力响应，并消除在HDI相互作用期间安装在载荷梁上的滑块的振动模式 在磁盘驱动器操作期间具有磁盘表面粗糙度。

公开(公告)号：US20080030900A1

公开(公告)日：2008-02-07

申请号：US11497161

申请日：2006-08-01

申请人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

发明人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

IPC分类号： G11B5/60 ,  G11B15/64 ,  G11B21/16

CPC分类号： G11B5/4826

摘要： Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.

摘要翻译： 提供了云台设计，可以最大程度地降低HDD悬架的不利动态性能，特别是在磁头 - 磁盘接口（HDI）交互之后。 在这种HDI相互作用之后，万向节安装的滑块的振动模式的图形表示可以看出操作性能的改善。 每个万向节设计包括斜坡限制器，其形成为通过一个或两个横向杆连接的两个分离的臂，以及减轻应力并最小程度地接触这些杆的导电迹线的布线。

公开(公告)号：US20130250446A1

公开(公告)日：2013-09-26

申请号：US13424640

申请日：2012-03-20

申请人： Qinghua Zeng ,  Ellis Cha

发明人： Qinghua Zeng ,  Ellis Cha

IPC分类号： G11B21/12 ,  G11B5/09

CPC分类号： G11B5/607 ,  G11B5/4555 ,  G11B5/6076

摘要： A method to compensate for spacing variations between a dynamic fly height (DFH) controlled read/write head and a rotating disk surface. Using a HDI sensor or equivalent indicator of touchdowns, a power profile is calculated for an arbitrary track on a disk. The profile tracks disk topography by recording touchdown power at each of a series of sectors into which the track is subdivided. The resulting power profile, smoothed and expressed as a function of sector position, substitutes for the usual constant TD power setting that provides only an uncompensated range of spacing variations. A fixed back-off spacing power is added to the power profile enabling the head to fly over the track at a constant spacing. The power profile can be calculated to account for various temperature and pressure conditions.

摘要翻译： 一种用于补偿动态飞行高度（DFH）控制的读/写头和旋转盘表面之间的间距变化的方法。 使用HDI传感器或触地得分的等效指示符，计算磁盘上任意轨道的功率曲线。 轮廓通过在轨道被细分的一系列扇区中的每一个记录触地功率来跟踪盘形地形。 所得到的功率曲线，平滑并且表示为扇区位置的函数，代替通常的恒定TD功率设置，其仅提供无补偿的间隔变化范围。 固定的后退间距功率被添加到功率轮廓中，使得头以恒定的间距飞越轨道。 功率曲线可以计算出各种温度和压力条件。

公开(公告)号：US20100172057A1

公开(公告)日：2010-07-08

申请号：US12660901

申请日：2010-03-05

申请人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

发明人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

IPC分类号： G11B21/16

CPC分类号： G11B5/4826

摘要： Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.

公开(公告)号：US07684154B2

公开(公告)日：2010-03-23

申请号：US11497161

申请日：2006-08-01

申请人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

发明人： Qinghua Zeng ,  Chao-Hui Yang ,  Yen Fu ,  Ellis Cha

IPC分类号： G11B5/54 ,  G11B21/22

CPC分类号： G11B5/4826

摘要： Gimbal designs are provided that minimize adverse dynamic performance of a HDD suspension, particularly subsequent to head-disk-interface (HDI) interactions. The improvement of operational performance can be seen in graphical representations of the vibrational modes of a gimbal mounted slider subsequent to such HDI interactions. Each gimbal design includes a ramp limiter formed as two separated arms connected by one or two transverse bars and a routing of conducting traces that relieves stress and minimally contacts these bars.

摘要翻译： 提供了云台设计，可以最大程度地降低HDD悬架的不利动态性能，特别是在磁头 - 磁盘接口（HDI）交互之后。 在这种HDI相互作用之后，万向节安装的滑块的振动模式的图形表示可以看出操作性能的改善。 每个万向节设计包括斜坡限制器，其形成为通过一个或两个横向杆连接的两个分离的臂，以及减轻应力并最小程度地接触这些杆的导电迹线的布线。