公开(公告)号：US06590739B2

公开(公告)日：2003-07-08

申请号：US09860218

申请日：2001-05-19

申请人： Quock Ying Ng ,  Xiong Liu ,  Choonkiat Lim

发明人： Quock Ying Ng ,  Xiong Liu ,  Choonkiat Lim

IPC分类号： G11B1920

CPC分类号： G11B17/0287 ,  G11B25/043

摘要： A disc clamp made from a shape memory alloy is configured for tight fit between an upper ledge of a spindle hub and the upper surface of a disc when the disc clamp is in an austenitic phase. In a martensitic phase, the disc clamp is configured for easy assembly over the spindle hub. The disc of the present invention provides for uniform distribution of clamping forces on the disc, and avoids the need for threaded holes in the spindle hub.

摘要翻译： 由形状记忆合金制成的圆盘夹具构造成当盘式夹具处于奥氏体相时，在主轴毂的上凸缘和盘的上表面之间紧密配合。 在马氏体相中，盘夹被配置为容易地组装在主轴毂上。 本发明的盘提供了在盘上的均匀分布的夹紧力，并且避免了在主轴毂中需要螺纹孔。

公开(公告)号：US06453722B1

公开(公告)日：2002-09-24

申请号：US09330938

申请日：1999-06-11

申请人： Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin Arthur Gomez ,  Choonkiat Lim

发明人： Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin Arthur Gomez ,  Choonkiat Lim

IPC分类号： G11B2102

CPC分类号： G11B21/00 ,  G11B5/5521 ,  G11B5/5534 ,  G11B33/10

摘要： Disclosed is a method and apparatus for determining the dynamic characteristics of a desired component of an actuator assembly. Further, said method and apparatus are capable of determining the dynamic characteristics independent of any drive servo electronics. The system and method can also be used to determine other operating parameters such as rotational inertia. This information is useful for design verification, quality assurance and failure analysis.

摘要翻译： 公开了一种用于确定致动器组件的期望部件的动态特性的方法和装置。 此外，所述方法和装置能够独立于任何驱动伺服电子装置来确定动态特性。 系统和方法也可用于确定其他操作参数，如转动惯量。 此信息对于设计验证，质量保证和故障分析很有用。

公开(公告)号：US06687094B2

公开(公告)日：2004-02-03

申请号：US09897702

申请日：2001-06-29

申请人： Xiong Liu ,  Shri Hari Narayan ,  Michael Joo Chiang Toh ,  Choonkiat Lim ,  ChorShan Cheng

发明人： Xiong Liu ,  Shri Hari Narayan ,  Michael Joo Chiang Toh ,  Choonkiat Lim ,  ChorShan Cheng

IPC分类号： G11B555

CPC分类号： G11B5/4826 ,  G11B5/5565

摘要： An actuator having a relatively low mass for supporting flexible head suspension assemblies to read data from or write data to discs. The actuator includes an actuator body adapted to rotationally coupled to a base chassis of the disc drive and a yoke assembly including yoke arms extending from the actuator body. The actuator includes at least one rigid actuator arm rigidly supporting the flexible head suspension assemblies. The rigid actuator arm includes multiple arm plates supported in spaced relation to provide a thickness of the actuator arm for lateral stiffness.

摘要翻译： 具有相对低质量的致动器，用于支撑柔性头悬挂组件以从盘读取数据或向盘写数据。 致动器包括适于旋转地联接到盘驱动器的底架的致动器主体和包括从致动器主体延伸的轭臂的轭组件。 致动器包括刚性地支撑柔性头悬挂组件的至少一个刚性致动器臂。 刚性致动器臂包括以间隔开的方式支撑的多个臂板，以提供用于横向刚度的致动器臂的厚度。

公开(公告)号：US06856485B2

公开(公告)日：2005-02-15

申请号：US09756815

申请日：2001-02-05

申请人： Michael Joo Chiang Toh ,  Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Choonkiat Lim

发明人： Michael Joo Chiang Toh ,  Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Choonkiat Lim

IPC分类号： F16C35/073 ,  G11B5/55 ,  G11B21/08 ,  G11B21/16

CPC分类号： G11B5/5521 ,  F16C35/067 ,  F16C2370/12 ,  G11B21/083

摘要： A disc drive having a pivot cartridge and an actuator assembly. The actuator assembly consists of an actuator body which has a bore therein to receive the pivot cartridge. The actuator body further consists of an opening which serves as a ledge to engage a biased retaining ring. The biased retaining ring couples onto the pivot cartridge and forces the pivot cartridge to contact against one side of the bore of the actuator body.

摘要翻译： 具有枢轴筒和致动器组件的盘驱动器。 致动器组件由致动器主体组成，该致动器主体在其中具有用于接纳枢轴盒的孔。 致动器主体还包括用作突出部以接合偏置保持环的开口。 偏置的保持环联接到枢轴筒上并迫使枢轴筒与制动器主体的孔的一侧接触。

公开(公告)号：US06765737B1

公开(公告)日：2004-07-20

申请号：US09519910

申请日：2000-03-07

申请人： Choonkiat Lim ,  Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin A. Gomez

发明人： Choonkiat Lim ,  Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin A. Gomez

IPC分类号： G11B509

CPC分类号： G11B5/012 ,  G11B5/59627

摘要： A disc drive includes a base and a disc rotatably attached to the base. The disc has an inner diameter and an outer diameter and a plurality of tracks. Information is written on the plurality of tracks. The plurality of tracks are written at a variable track pitch. The tracks positioned near the outer diameter are wider in pitch than the tracks positioned near the inner diameter. The plurality of tracks further include a first group of tracks written at a first track pitch, and a second group of tracks written at a second track pitch. The track pitch of each of the first group and the second group of tracks is selected such that the percentage of track misregistration for each group will be substantially the same. This method provides a means to increase storage capacity for a predetermined track misregistration budget.

摘要翻译： 盘驱动器包括基座和可旋转地附接到基座的盘。 盘具有内径和外径以及多个轨道。 信息写在多个轨道上。 以可变轨道间距写入多个轨迹。 位于外径附近的轨道的间距比位于内径附近的轨道宽。 多个轨道还包括以第一轨道间距写入的第一组轨道和以第二轨道间距写入的第二组轨道。 选择第一组和第二组轨道中的每一个的轨道间距，使得每个组的轨道重合失调的百分比将基本相同。 该方法提供了一种增加预定轨道重合不足预算的存储容量的方法。

公开(公告)号：US06476995B1

公开(公告)日：2002-11-05

申请号：US09483525

申请日：2000-01-14

申请人： Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin A. Gomez ,  Choonkiat Lim

发明人： Xiong Liu ,  Joseph Cheng-Tsu Liu ,  Kevin A. Gomez ,  Choonkiat Lim

IPC分类号： G11B2102

CPC分类号： G11B5/5521 ,  G11B5/4813 ,  G11B5/5582 ,  G11B5/59627 ,  G11B5/59633 ,  G11B5/59638

摘要： An HDA includes a base, a disc stack coupled to a spindle rotatably attached to the base by a spindle shaft and spindle bearing. An actuator assembly is pivotally attached to the base at a pivot shaft. Attached to one end of the actuator assembly proximal the disc stack is one or more transducers for reading/writing information from/to the discs. A servo writer includes a controller for moving the actuator during the servo writing process. The controller moves the servo writer at the cage frequency of the spindle bearing to lessen the relative motion between the transducer head and the disc as the servo information is written to the disc. The controller also may be programmed to move the transducer at both the spindle rotation frequency and the cage frequency of the spindle bearing to lessen the relative motion between the transducer and the disc during the servo writing process.

摘要翻译： HDA包括底座，联接到通过主轴和主轴轴承可旋转地附接到基座的心轴的盘组。 致动器组件在枢轴处枢转地附接到基座。 靠近盘片组件的致动器组件的一端附接有用于从/向盘读/写信息的一个或多个换能器。 伺服写入器包括用于在伺服写入过程中使致动器移动的控制器。 当伺服信息写入光盘时，控制器将伺服写卡机以主轴轴承的笼式频率移动，以减小换能器头与盘之间的相对运动。 控制器还可以被编程为在主轴转动频率和主轴轴承的保持架频率下移动换能器，以在伺服写入过程期间减小换能器和盘之间的相对运动。

公开(公告)号：US06724562B1

公开(公告)日：2004-04-20

申请号：US09538535

申请日：2000-03-30

申请人： Chiap Heok Ang ,  Niroot Jierapipatanakul ,  Beng Theam Ko ,  Myint Ngwe ,  Beng Wee Quak ,  Choonkiat Lim

发明人： Chiap Heok Ang ,  Niroot Jierapipatanakul ,  Beng Theam Ko ,  Myint Ngwe ,  Beng Wee Quak ,  Choonkiat Lim

IPC分类号： G11B5596

CPC分类号： G11B5/59633

摘要： A method for writing servo patterns on at least one disc in a disc drive that has a first set of tracks and a second set of tracks on a major surface of the disc includes stepping between the tracks of the first set of tracks at a first constant angle, and stepping between the tracks of the second set of tracks at a second constant angle. Stepping between tracks in the first group or the second group includes selecting two adjacent tracks from either the first group of tracks or the second group of tracks, and determining the angle through which an actuator assembly must be rotated between the two adjacent tracks selected to produce a selected track pitch. The method produces a disc for a disc drive with a first set of tracks, and a second set of tracks in which the track pitch varies across the set of tracks.

摘要翻译： 一种用于在盘驱动器中的至少一个盘上写入伺服图案的方法，所述盘驱动器具有第一组轨道，并且在所述盘的主表面上的第二组轨道包括在所述第一组轨道的轨道之间以第一常数 角度，并以第二恒定角度在第二组轨道的轨迹之间进行步进。 在第一组或第二组中的轨道之间的步进包括从第一组轨道或第二组轨道中选择两个相邻的轨道，并且确定致动器组件必须在被选择产生的两个相邻轨道之间旋转的角度 选定的音高。 该方法产生用于具有第一组轨道的盘驱动器的盘，以及轨道间距在该组轨道上变化的第二组轨道。