公开(公告)号：US09940960B2

公开(公告)日：2018-04-10

申请号：US15162704

申请日：2016-05-24

申请人： SAE Magnetics (H.K.) Ltd. ,  Headway Technologies, Inc.

发明人： Ellis Cha ,  Sindy Yeung ,  Penny Wan Ting Looi ,  Ben Kwun Pan Ng

IPC分类号： G11B5/60

CPC分类号： G11B5/6082 ,  G11B5/6005

摘要： A slider design for a hard disk drive (HDD) features an air-bearing surface (ABS) topography with arrays of micro-dots formed on bases of a multiplicity of cavities at different depths. The design eliminates the accumulation of hydrocarbons (e.g., spindle oil and disk lubricant) deposits in regions of air stagnation within the cavities where backflows and foreflows of air meet and cancel during HDD operation. The micro-dots are small raised regions of various shapes having sizes and spacings in the range between 2 and 100 microns and, in a preferred embodiment, heights of 0.15 microns above the cavity bases.

公开(公告)号：US08867172B2

公开(公告)日：2014-10-21

申请号：US13562612

申请日：2012-07-31

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

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

IPC分类号： G11B5/60 ,  G11B21/20

CPC分类号： G11B5/607 ,  G11B5/6076 ,  G11B5/6082

摘要： 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.

摘要翻译： 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：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：US08107200B2

公开(公告)日：2012-01-31

申请号：US12214504

申请日：2008-06-19

申请人： Eric Cheuk Wing Leung ,  Anthony Wai Yuen Lai ,  Pak Kin Wong ,  David Hu ,  Moris Dovek ,  Rod Lee

发明人： Eric Cheuk Wing Leung ,  Anthony Wai Yuen Lai ,  Pak Kin Wong ,  David Hu ,  Moris Dovek ,  Rod Lee

IPC分类号： G11B5/39

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/11 ,  G11B5/3909 ,  G11B5/40 ,  G11B2005/3996 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A slider mounted CPP GMR or TMR read head sensor is protected from electrostatic discharge (ESD) damage and from noise and cross-talk from an adjacent write head by means of a balanced resistive/capacitative shunt. The shunt includes highly resistive interconnections between upper and lower shields of the read head and a grounded slider substrate and a low resistance interconnection between the lower pole piece of the write head and the substrate. The capacitances between the pole piece and the upper shield, the upper shield and the lower shield and the lower shield and the substrate are made equal by either forming the shields and pole piece with equal surface areas and separating them with dielectrics of equal thicknesses, or by keeping the ratio of area to insulator thicknesses equal.

摘要翻译： 滑块安装的CPP GMR或TMR读取头传感器通过平衡的电阻/电容分流器被保护免受静电放电（ESD）损坏和来自相邻写头的噪声和串扰的影响。 分流器包括读头的上屏蔽和下屏蔽之间的高电阻互连以及接地的滑块基板和写头的下极片与衬底之间的低电阻互连。 通过形成具有相同表面积的屏蔽件和极片，并将它们与相同厚度的电介质分离，使极片与上屏蔽，上屏蔽和下屏蔽以及下屏蔽和基板之间的电容相等，或 通过保持面积与绝缘体厚度的比例相等。

公开(公告)号：US08014104B2

公开(公告)日：2011-09-06

申请号：US11726156

申请日：2007-03-21

申请人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

发明人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

IPC分类号： G11B5/255 ,  G11B5/72

CPC分类号： G11B5/72 ,  G11B5/3106 ,  G11B5/3163 ,  G11B5/8408 ,  Y10T428/1164

摘要： A protective bilayer on a magnetic read/write head or magnetic disk is formed as an adhesion enhancing and corrosion resistant underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is a transition metal oxynitride, having the general formula MeOxNy, where Me represents a single element or an alloy of the following transition metal elements: Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W, here x can be within the range between 0 and 3 and y is in the range between approximately 0 and 2. Adjusting the values of x and y contributes to such qualities of the protective bilayer as stress compensation, chemical and mechanical stability and low electrical conductivity. Methods of forming the adhesion layer, include reactive ion sputtering, plasma assisted chemical vapor deposition, pulsed laser deposition and plasma immersion ion implantation.

摘要翻译： 形成磁性读/写磁头或磁盘上的保护性双层作为粘合增强和耐腐蚀的底层和保护性金刚石碳（DLC）覆盖层。 底层是具有通式MeOxNy的过渡金属氧氮化物，其中Me表示以下过渡金属元素的单一元素或合金：Ti，Zr，Hf，V，Nb，Ta，Cr，Mo和W，这里 x可以在0和3之间，y在大约0和2之间的范围内。调整x和y的值有助于保护层的质量，如应力补偿，化学和机械稳定性以及低导电性。 形成粘合层的方法包括反应离子溅射，等离子体辅助化学气相沉积，脉冲激光沉积和等离子体浸入离子注入。

公开(公告)号：US07957104B2

公开(公告)日：2011-06-07

申请号：US11692133

申请日：2007-03-27

申请人： Yen Fu ,  Ellis T. Cha ,  Chao-Hui Yang

发明人： Yen Fu ,  Ellis T. Cha ,  Chao-Hui Yang

IPC分类号： G11B5/56

CPC分类号： G11B5/4833 ,  G11B5/4873

摘要： A flexure with improved temperature sensitivity is disclosed. An embodiment of the present invention includes a bi-layered flexure that raises or lowers a read/write element a distance that is approximately equal to the distance of protrusion and retraction at varying temperatures.

摘要翻译： 公开了具有改善的温度灵敏度的挠曲。 本发明的实施例包括双层弯曲，其使读/写元件的距离大大等于在变化的温度下的突出和缩回的距离。

公开(公告)号：US07907368B2

公开(公告)日：2011-03-15

申请号：US11691437

申请日：2007-03-26

申请人： Qinghua Zeng ,  Yen Fu ,  Li-Yan Zhu ,  Chao-Hui Yang ,  Ellis T. Cha

发明人： Qinghua Zeng ,  Yen Fu ,  Li-Yan Zhu ,  Chao-Hui Yang ,  Ellis T. Cha

IPC分类号： G11B5/55

CPC分类号： G11B5/4826 ,  Y10T29/49826

摘要： In a balanced head gimbal assembly for improved seeking performance, a slider having a magnetic head with a set of read elements to read data and a set of write elements to write data, an air-bearing surface, and a non-air-bearing surface is coupled to a suspension. The suspension includes a loadbeam, a flexure, and a balancing weight. The loadbeam is coupled to an actuator arm. The flexure, coupled to the loadbeam, has a window through which a dimple, coupled to the loadbeam, contacts a dimple contact point. The balancing weight, coupled to the flexure, has a configuration which permits alignment of a center of mass of the head gimbal assembly with the dimple contact point.

摘要翻译： 在用于改善寻求性能的平衡头万向架组件中，具有磁头的滑块具有一组用于读取数据的读取元件和一组写入元件以写入数据，空气轴承表面和非空气轴承表面 耦合到悬架。 悬架包括载重梁，挠性件和平衡重物。 负载梁耦合到致动器臂。 耦合到负载束的挠曲件具有窗口，通过该窗口，耦合到负载束的凹部接触凹坑接触点。 耦合到挠曲件的平衡重具有允许头部万向架组件的质心与凹坑接触点对准的构造。

公开(公告)号：US20100307911A1

公开(公告)日：2010-12-09

申请号：US12804935

申请日：2010-08-02

申请人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

发明人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

IPC分类号： G11B5/127 ,  C23C14/46 ,  B01J19/12

CPC分类号： G11B5/3106 ,  C23C14/024 ,  C23C14/0605 ,  C23C14/0676 ,  G11B5/3163 ,  G11B5/72 ,  G11B5/8408 ,  G11B23/0064 ,  Y10T29/49043 ,  Y10T428/1164

摘要： A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlOxNy or MezAlOxNy where Mez symbolizes Tiz, Siz or Crz and where x, y and z can be varied within the formation process. By adjusting the values of x and y the adhesion underlayer contributes to such qualities of the protective bilayer as stress compensation, chemical and mechanical stability and low electrical conductivity. Various methods of forming the underlayer are provided, including reactive ion sputtering, plasma assisted chemical vapor deposition, pulsed laser deposition and plasma immersion ion implantation.

摘要翻译： 一种在磁读/写磁头或磁盘上形成保护双层的方法。 双层形成为粘合增强底层和保护性金刚石碳（DLC）覆盖层。 底层由具有通式AlOxNy或MezAlOxNy的铝或合金化氧化铝铝形成，其中Mez表示Tiz，Siz或Crz，其中x，y和z可以在形成过程中变化。 通过调整x和y的值，粘合剂底层有助于保护层的质量，如应力补偿，化学和机械稳定性以及低导电性。 提供了形成底层的各种方法，包括反应离子溅射，等离子体辅助化学气相沉积，脉冲激光沉积和等离子体浸入离子注入。

公开(公告)号：US07837885B2

公开(公告)日：2010-11-23

申请号：US11594343

申请日：2006-11-07

申请人： Ellis T. Cha ,  Zhu Feng ,  Xinjiang Shen ,  Sindy Yeung

发明人： Ellis T. Cha ,  Zhu Feng ,  Xinjiang Shen ,  Sindy Yeung

IPC分类号： G11B5/127

CPC分类号： G11B5/6082 ,  G11B5/40 ,  G11B5/6064 ,  Y10T29/49041

摘要： An embodiment of the present invention is an ABS design with a pitch ladder feature. This embodiment has an air flow squeezing channel which consists of one airflow blocker and three etching steps. The airflow blocker can be used to limit the incoming air flow from the leading edge of the ABS. Additionally, the embodiment contains an air channel that reduces altitude sensitivity by channeling air at the inner diameter into a sub-ambient pressure cavity.

摘要翻译： 本发明的实施例是具有螺距梯特征的ABS设计。 该实施例具有由一个气流阻塞器和三个蚀刻步骤组成的气流挤压通道。 气流阻塞器可用于限制从ABS的前缘进入的空气流。 此外，该实施例包含通过将内径处的空气引导到次环境压力腔中而降低高度感度的空气通道。

公开(公告)号：US07782569B2

公开(公告)日：2010-08-24

申请号：US11655025

申请日：2007-01-18

申请人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

发明人： Shide Cheng ,  Zhu Feng ,  Ellis T. Cha

IPC分类号： G11B5/60 ,  G11B5/187

CPC分类号： G11B5/3106 ,  C23C14/024 ,  C23C14/0605 ,  C23C14/0676 ,  G11B5/3163 ,  G11B5/72 ,  G11B5/8408 ,  G11B23/0064 ,  Y10T29/49043 ,  Y10T428/1164

摘要： A method for forming a protective bilayer on a magnetic read/write head or magnetic disk. The bilayer is formed as an adhesion enhancing underlayer and a protective diamond-like carbon (DLC) overlayer. The underlayer is formed of an aluminum or alloyed aluminum oxynitride, having the general formula AlOxNy or MezAlOxNy where Mez symbolizes Tiz, Siz or Crz and where x, y and z can be varied within the formation process. By adjusting the values of x and y the adhesion underlayer contributes to such qualities of the protective bilayer as stress compensation, chemical and mechanical stability and low electrical conductivity. Various methods of forming the underlayer are provided, including reactive ion sputtering, plasma assisted chemical vapor deposition, pulsed laser deposition and plasma immersion ion implantation.

摘要翻译： 一种在磁读/写磁头或磁盘上形成保护双层的方法。 双层形成为粘合增强底层和保护性金刚石碳（DLC）覆盖层。 底层由具有通式AlOxNy或MezAlOxNy的铝或合金化氧化铝铝形成，其中Mez表示Tiz，Siz或Crz，其中x，y和z可以在形成过程中变化。 通过调整x和y的值，粘合剂底层有助于保护层的质量，如应力补偿，化学和机械稳定性以及低导电性。 提供了形成底层的各种方法，包括反应离子溅射，等离子体辅助化学气相沉积，脉冲激光沉积和等离子体浸入离子注入。