公开(公告)号：US20140036384A1

公开(公告)日：2014-02-06

申请号：US13562612

申请日：2012-07-31

Applicant: Guoqiang Zheng ,  Wan Ting Looi ,  Kwun Pan Ng ,  Ellis Cha

Inventor： Guoqiang Zheng ,  Wan Ting Looi ,  Kwun Pan Ng ,  Ellis Cha

IPC: G11B21/12 ,  B44C1/22

CPC classification number: G11B5/607 ,  G11B5/6076 ,  G11B5/6082

Abstract: A DFH (Dynamic Flying Height) type slider ABS design has significantly improved DFH efficiency and back-off efficiency as well as uniform touchdown detectability. This is the result of decoupling the local pressure variations at the read/write head that result from skew angle variations across a disk, from local stiffness due to ABS protrusion caused by heater activation. The decoupling, which allows the heater activation stiffness to be carefully tuned, is a result of the effects of airflow channeled by a wide down-track channel onto a narrow down-track channel formed in an extended finger of the central pad of the slider. Airflow impinges on the finger channel in a manner that eliminates variations in air pressure at the central pad due to variations in skew angle.

Abstract translation: DFH（动态飞行高度）型滑块ABS设计显着提高了DFH效率和回退效率以及均匀的触地检测能力。 这是由于由于加热器激活引起的ABS突起引起的局部刚度导致由读取/写入头引起的局部压力变化导致的，由于盘上的偏斜角变化导致的局部压力变化。 允许仔细调节加热器激活刚度的解耦是由宽的下行通道引导的气流对形成在滑块的中心焊盘的延长的指状物中的窄的下轨道通道的影响的结果。 气流以消除由于偏斜角度的变化而在中心焊盘处的空气压力变化的方式撞击在手指通道上。

公开(公告)号：US20110299196A1

公开(公告)日：2011-12-08

申请号：US13136914

申请日：2011-08-15

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

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

IPC: G11B21/16

CPC classification number: G11B5/4826

Abstract: 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.

Abstract translation: 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：US07433156B2

公开(公告)日：2008-10-07

申请号：US11351940

申请日：2006-02-10

Applicant: Li-Yan Zhu ,  Chao-Hui Yang ,  Mannuel Hernandez ,  Yen Fu ,  Ellis Cha

Inventor： Li-Yan Zhu ,  Chao-Hui Yang ,  Mannuel Hernandez ,  Yen Fu ,  Ellis Cha

IPC: G11B5/48

CPC classification number: G11B5/4826 ,  G11B5/4833

Abstract: A flexure mounted slider and its method of fabrication is described, wherein the slider is affixed to a pair of highly compliant, transverse (to the longitudinal axis of a load beam) crossbars whose common axis passes directly above the center of percussion of the slider. The location of the center of percussion of the slider relative to the flexure eliminates translational motion of the slider during HDI events, but not twisting motion in a pitch direction during normal operation, and thereby minimizes the transfer of kinetic energy between the slider and the flexure during HDI events with a hard disk. The high compliance of the flexure crossbars to twists in a pitch direction, as well as the compliance of the outriggers to bending, allows the slider to pass over irregularities in the disk during normal operations.

Abstract translation: 描述了一种弯曲安装的滑块及其制造方法，其中滑块固定在一对高度柔顺的横向（相对于负载梁的纵向轴线）的横梁上，其公共轴线直接穿过滑块的冲击中心。 滑块相对于弯曲部的冲击中心的位置消除了HDI事件期间滑块的平移运动，而在正常操作期间不会在俯仰方向上扭转运动，从而使滑块和挠曲件之间的动能传递最小化 在HDI事件与硬盘。 弯曲横梁在俯仰方向上的高度柔顺性以及外伸支架对弯曲的顺应性允许滑块在正常操作期间经过盘中的不规则。

公开(公告)号：US20080123221A1

公开(公告)日：2008-05-29

申请号：US11564251

申请日：2006-11-28

Applicant: Qinghua ZENG ,  Yen FU ,  Ellis CHA

Inventor： Qinghua ZENG ,  Yen FU ,  Ellis CHA

IPC: G11B5/48

CPC classification number: G11B5/4826

Abstract: In a suspension in a hard disk drive, a gimbal with asymmetric dynamic properties, in which the two halves of the gimbal may have different stiffness distribution or inertia distribution. Structural difference between the two halves, or materials with different stiffness, may cause the different stiffness distribution or inertia distribution. When the suspension vibrates, the different stiffness and/or inertia distribution increase the friction between the gimbal and a load beam of the suspension, and increase the damping of the suspension.

Abstract translation: 在硬盘驱动器的悬架中，具有不对称动态特性的万向架，其中万向节的两半可具有不同的刚度分布或惯性分布。 两半之间的结构差异或具有不同刚度的材料可能导致不同的刚度分布或惯性分布。 当悬架振动时，不同的刚度和/或惯性分布增加了万向节和悬架的载荷梁之间的摩擦力，并增加了悬架的阻尼。

公开(公告)号：US07327535B2

公开(公告)日：2008-02-05

申请号：US10434949

申请日：2003-05-08

Applicant: Zhu Feng ,  Ellis Cha

Inventor： Zhu Feng ,  Ellis Cha

IPC: G11B5/187 ,  G11B5/60

CPC classification number: B82Y30/00 ,  G11B5/255 ,  Y10T428/11

Abstract: A system and method for providing corrosion protection for a magnetic read/write head is disclosed. A monolayer surface coating is applied to cover those portions of the under layer of a magnetic read/write head not already covered by a previously applied diamond-like coating. This allows for a thinner diamond like coating than previously applied in the art. The monolayer surface coating can be a self-assembled monolayer, such as an organosilicon for hydroxylated surfaces or carboxylic acids for aluminum or other metal oxides. Alternatively, the monolayer surface coating can be directly applied to the under layer with no diamond-like coating being present. The monolayer surface coating can be applied by a surface immersion process or by a vacuum coating process.

Abstract translation: 公开了一种用于为磁读/写头提供防腐蚀的系统和方法。 施加单层表面涂层以覆盖未被先前施加的类金刚石涂层覆盖的磁读/写头的下层的那些部分。 这允许比本领域中先前应用的更薄的金刚石类涂层。 单层表面涂层可以是自组装单层，例如羟基化表面的有机硅或铝或其它金属氧化物的羧酸。 或者，单层表面涂层可以直接施加到底层，而不存在类金刚石涂层。 单层表面涂层可以通过表面浸渍法或真空镀膜法施加。

公开(公告)号：US20060176596A1

公开(公告)日：2006-08-10

申请号：US11399284

申请日：2006-04-06

Applicant: Zhu Feng ,  Ellis Cha ,  Xiaofeng Zhang

Inventor： Zhu Feng ,  Ellis Cha ,  Xiaofeng Zhang

IPC: G11B27/36

CPC classification number: G11B5/60

Abstract: A system and method for measuring and neutralizing the electrical charge at the interface of a magnetic head and a magnetic storage medium, such as a disk, is disclosed. A surface treatment material is applied to the magnetic head. The surface treatment material matches the medium surface material on the surface of the magnetic storage medium. The surface treatment material on the magnetic read/write head may be a fluorinated carbon, such as a Fomblin Z-derivative, perfluoro alkyl trichlorosilane, a FC-722, or a fluorinated polymer. The surface treatment material can be applied to the magnetic head by a vapor deposition process or by a liquid immersion process. The charge on the head-disk interface can be measured by applying varying external charges to the head while reading a signal previously written to the disk.

Abstract translation: 公开了一种用于测量和中和磁头和诸如磁盘的磁存储介质的界面处的电荷的系统和方法。 将表面处理材料施加到磁头。 表面处理材料与磁性存储介质表面上的介质表面材料相匹配。 磁读写头上的表面处理材料可以是氟化碳，如Fomblin Z衍生物，全氟烷基三氯硅烷，FC-722或氟化聚合物。 表面处理材料可以通过气相沉积法或液浸法施加到磁头上。 头磁盘接口上的电荷可以通过在读取先前写入磁盘的信号时向磁头施加变化的外部电荷来测量。

公开(公告)号：US20050237668A1

公开(公告)日：2005-10-27

申请号：US11110153

申请日：2005-04-19

Applicant: Ellis Cha ,  Guoqiang Zheng ,  Sindy Yeung

Inventor： Ellis Cha ,  Guoqiang Zheng ,  Sindy Yeung

IPC: G11B5/60 ,  G11B21/21

CPC classification number: G11B5/6082

Abstract: An apparatus allowing for a slider for use in a disk drive is disclosed. An embodiment of the present invention may include a leading side, a trailing side, at least two main rails, a slider surface with an air bearing surface, and at least one trench substantially parallel to the width of the slider. The trench in the air bearing surface results in a lower compression length of the slider and allows for particles to be channeled off of the disk surface.

Abstract translation: 公开了一种允许在盘驱动器中使用的滑块的装置。 本发明的实施例可以包括前侧，后侧，至少两个主轨道，具有空气轴承表面的滑块表面，以及基本上平行于滑块的宽度的至少一个沟槽。 空气轴承表面中的沟槽导致滑块的较低压缩长度，并允许颗粒从盘表面引出。

公开(公告)号：US20050010684A1

公开(公告)日：2005-01-13

申请号：US10614217

申请日：2003-07-08

Applicant: Ellis Cha

Inventor： Ellis Cha

IPC: G11B5/60 ,  G06F15/173 ,  G11B21/21

CPC classification number: G11B5/6082

Abstract: A subambient pressure air bearing slider for disk drives and the like is presented where features of the slider are modular, in that certain parameters of the slider can be modified independently of one another. In one example, lateral dimensions and placement of side and trailing air bearing surfaces can be used to control flying height sensitivity due to crowning in the slider. Longitudinal dimensions of the side air bearing surfaces can be used to control flying height sensitivity due to camber in the slider body. Low-profile members (e.g., ones that do not form air bearing surfaces) may be used to control the dimensions of the subambient pressure region to control overall flying height.

Abstract translation: 提供了一种用于磁盘驱动器等的低压空气轴承滑块，其中滑块的特征是模块化的，因为滑块的某些参数可以彼此独立地进行修改。 在一个示例中，侧向尺寸和侧面和尾部空气轴承表面的放置可以用于控制由于滑块中的隆起而引起的飞行高度灵敏度。 侧面空气轴承表面的纵向尺寸可用于控制由于滑块体中的弯度引起的飞行高度灵敏度。 低轮廓构件（例如，不形成空气轴承表面的构件）可以用于控制次级压力区域的尺寸以控制总体飞行高度。

公开(公告)号：US09251829B2

公开(公告)日：2016-02-02

申请号：US13317402

申请日：2011-10-17

Applicant: Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

Inventor： Siu Yin Ngan ,  Qinghua Zeng ,  Ellis Cha

IPC: G11B5/60 ,  G11B27/36

CPC classification number: G11B5/607 ,  G11B5/6011 ,  G11B5/6029 ,  G11B5/6076 ,  G11B27/36 ,  G11B2220/2516

Abstract: 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：US08767339B2

公开(公告)日：2014-07-01

申请号：US13424640

申请日：2012-03-20

Applicant: Qinghua Zeng ,  Ellis Cha

Inventor： Qinghua Zeng ,  Ellis Cha

IPC: G11B21/02 ,  G11B5/60

CPC classification number: G11B5/607 ,  G11B5/4555 ,  G11B5/6076

Abstract: 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.

Abstract translation: 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。