公开(公告)号：US06407891B1

公开(公告)日：2002-06-18

申请号：US09317808

申请日：1999-05-24

申请人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

发明人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

IPC分类号： G11B539

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/17 ,  G11B5/313 ,  G11B5/3967 ,  G11B23/0007

摘要： The present invention is a read/write head for writing information to magnetic media and reading information from magnetic media. It includes a write head for writing information onto magnetic media, a read head for reading information from the magnetic media, and an electrical circuit element that is disposed proximate the read head that functions to generate an electromagnetic field at the read head that is generally oppositely directed to the electromagnetic field generated by the write head. The method for operating the read/write head in a hard disk drive, includes the steps of writing data onto a hard disk, while simultaneously generating an electromagnetic field at the read head that is directed oppositely to the electromagnetic field generated by the write head.

摘要翻译： 本发明是一种用于向磁性介质写入信息并从磁性介质读取信息的读/写头。 它包括用于将信息写入磁性介质的写入头，用于从磁性介质读取信息的读取头，以及设置在读取头附近的电路元件，该电路元件用于在读取头处大致相反地产生电磁场 指向写头产生的电磁场。 用于在硬盘驱动器中操作读/写头的方法包括以下步骤：将数据写入硬盘，同时在读头处产生与写头产生的电磁场相反的电磁场。

公开(公告)号：US06477008B1

公开(公告)日：2002-11-05

申请号：US09317668

申请日：1999-05-24

申请人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

发明人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

IPC分类号： G11B5115

CPC分类号： G11B5/3103 ,  G11B5/11 ,  G11B5/3143 ,  G11B5/3967

摘要： The present invention is a read/write head for writing information to magnetic media and reading information from magnetic media. It includes a write head element for writing information onto magnetic media, a read head element for reading information from the magnetic media, and an electromagnetic field shield element that is disposed between the write head element and the read head element. The shield functions to shield the read head from electromagnetic field energy created by the write head element. An enhanced second embodiment includes an electrical circuit element that is disposed proximate the read head element that functions to generate an electromagnetic field at the read head element that is generally oppositely directed to the electromagnetic field generated by the write head element to reduce the total electromagnetic field that the read head element is exposed to during a writing operation. The method for operating the read/write head in a hard disk drive, includes the steps of writing data onto a hard disk and reading data from the hard disk simultaneously with the data writing. This is accomplished by shielding the read head from the electromagnetic field energy generated during the data writing by utilizing the electromagnetic field shield element that is disposed between the write head element and the said read head element. The electrical circuit element of the second embodiment is preferably interconnected with the write head electric circuit.

摘要翻译： 本发明是一种用于向磁性介质写入信息并从磁性介质读取信息的读/写头。 它包括用于将信息写入磁介质的写入头元件，用于从磁性介质读取信息的读取头元件以及设置在写入头元件和读取头元件之间的电磁场屏蔽元件。 屏蔽功能用于屏蔽读取头与写入头元件产生的电磁场能量。 增强的第二实施例包括设置在读头元件附近的电路元件，其功能是在读头元件处产生电磁场，该磁头元件通常与写头元件产生的电磁场相反地指向以减小总电磁场 读写头元件在写操作期间被暴露。 用于在硬盘驱动器中操作读/写头的方法包括以下步骤：将数据写入硬盘并且与数据写入同时从硬盘读取数据。 这是通过利用设置在写头元件和所述读头元件之间的电磁场屏蔽元件来屏蔽读头从数据写入期间产生的电磁场能量。 第二实施例的电路元件优选地与写入头电路互连。

公开(公告)号：US06330122B1

公开(公告)日：2001-12-11

申请号：US09317664

申请日：1999-05-24

申请人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

发明人： Thomas Young Chang ,  Shanlin Duan ,  Terence Tin-Lok Lam ,  Wai C. Leung

IPC分类号： G11B2736

CPC分类号： G11B27/36 ,  G01R33/1207 ,  G11B5/012 ,  G11B5/4886 ,  G11B20/1816 ,  G11B2005/001 ,  G11B2220/20

摘要： The hard disk testing and certifying device of the present invention includes a spin stand to rotate a disk to be tested. A single read/write head, including both a write head and a read head is mounted upon an armature which movably supports the read/write head. The device includes a computerized control system and signal processing system that provides write signals to the write head and receives and processes read head signals from the read head. In the preferred embodiment the read/write head simultaneously provides write signals to the disk and receives read signals from the disk. Preferably, the read/write head functions continually and the certification testing is conducted utilizing a spiral path. In the preferred read/write head the read head is disposed behind the write head and an electromagnetic field shield is disposed between them to reduce electromagnetic field interference between the write head and the read head during simultaneous operation. The read/write head may also include an electromagnetic field interference element to further reduce signal interference at the read head.

摘要翻译： 本发明的硬盘测试和认证装置包括旋转待测试盘的旋转架。 包括写入头和读取头的单个读/写头安装在可移动地支撑读/写头的电枢上。 该装置包括计算机控制系统和信号处理系统，其向写入头提供写入信号，并从读取头接收并处理读取头信号。 在优选实施例中，读/写头同时向盘提供写信号并从盘接收读信号。 优选地，读/写头连续工作，并且使用螺旋路径进行认证测试。 在优选的读/写头中，读头设置在写头后面，电磁场屏蔽设置在它们之间，以在同时操作期间减小写头和读头之间的电磁场干扰。 读/写头还可以包括电磁场干扰元件，以进一步减少读头的信号干扰。

公开(公告)号：US06357095B1

公开(公告)日：2002-03-19

申请号：US09360477

申请日：1999-07-23

申请人： Shanlin Duan ,  Wei-Ming Lee ,  Wai C. Leung

发明人： Shanlin Duan ,  Wei-Ming Lee ,  Wai C. Leung

IPC分类号： B24B3900

CPC分类号： G11B5/84 ,  Y10T29/47

摘要： The burnishing head for hard disk processing includes a solid body having generally rectangular surfaces, including an upper surface, a burnishing pad surface, a front surface, a rear surface and two side surfaces. A plurality of burnishing pads are disposed upon the burnishing pad surface. The pads are shaped such that each pad has a burnishing edge that is generally parallel to said front surface and therefore orthogonal to the direction of media travel. The burnishing pads are preferably configured such that one frontward leading pad is centrally disposed proximate the front surface of the head, followed by two middle pads that are disposed in a spaced apart relationship. A single centrally disposed rear middle pad is formed behind the two middle pads, and two rear pads are disposed in a spaced apart relationship at the rear surface of the head. In the preferred embodiment the pads are generally triangular in shape and the outer surface of the leading and rearward pads is tapered. The method for manufacturing the burnishing head, includes the steps of making a series of parallel cuts in a surface of a solid body of material. The burnishing pads result from material that remains following the cuts.

摘要翻译： 用于硬盘处理的抛光头包括具有大致矩形表面的固体，其包括上表面，抛光垫表面，前表面，后表面和两个侧表面。 多个抛光垫设置在抛光垫表面上。 焊盘的形状使得每个焊盘具有通常平行于所述前表面并因此正交于介质行进方向的抛光边缘。 抛光垫优选地被配置成使得一个前方的前垫靠近头部的前表面居中设置，随后是以间隔开的关系设置的两个中间垫。 在两个中间垫的后面形成一个居中设置的后中间垫，并且两个后垫在头部的后表面以间隔开的关系设置。 在优选实施例中，焊盘的形状通常为三角形，并且前部和后部焊盘的外表面是锥形的。 抛光头的制造方法包括在固体物质的表面上进行一系列平行切割的步骤。 抛光垫由切割后保留的材料产生。

公开(公告)号：US20110149706A1

公开(公告)日：2011-06-23

申请号：US12646831

申请日：2009-12-23

申请人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

发明人： Shanlin Duan ,  Jizhong He ,  John S. Hopkins ,  Kenneth E. Johnson

IPC分类号： G11B20/18 ,  G11B5/02

CPC分类号： G11B5/40 ,  G11B5/8404 ,  G11B20/10203 ,  G11B20/1816 ,  G11B27/36 ,  G11B2220/2516

摘要： A tool for testing a magnetic disk for use in a magnetic disk drive. The tool detects surface defects or asperities by detecting a change in electrical resistance corresponding to a temperature change in a thermally sensitive layer. The apparatus includes a slider body having a thermally insulating layer formed on an air bearing surface of the slider body and a thermal sensor layer formed on the thermally insulating layer. The thermally insulating layer prevents thermal heat spikes in the thermal sensor layer (such as resulting from contact with an asperity) from dissipating quickly into the slider body itself. The thermal sensor layer is a material that exhibits a change in electrical resistance in response to a change in temperature and is preferably a PTC thermistor material which exhibits a large change in electrical resistance when a transition temperature has been reached.

摘要翻译： 用于测试用于磁盘驱动器的磁盘的工具。 该工具通过检测对应于热敏层的温度变化的电阻变化来检测表面缺陷或粗糙度。 该装置包括：滑动体，其具有形成在滑块体的空气轴承表面上的绝热层和形成在绝热层上的热传感器层。 隔热层防止热传感器层中的热热尖峰（例如由于与粗糙度的接触而导致的））快速消散到滑块体本身。 热传感器层是响应于温度变化而呈现电阻变化的材料，优选是当达到转变温度时电阻变化很大的PTC热敏电阻材料。

公开(公告)号：US20110019298A1

公开(公告)日：2011-01-27

申请号：US12508363

申请日：2009-07-23

申请人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kazhao Zhang

发明人： Shanlin Duan ,  Zhen Jin ,  Jane Jie Zhang ,  Kazhao Zhang

IPC分类号： G11B27/36

CPC分类号： G11B5/607 ,  G11B5/455

摘要： Magnetic disk drive systems and associated methods are described for testing magnetic disk performance for certification with a plurality of magnetic disk drive systems prior to installation. The test system may position a slider at a first spacing between the magnetic disk in the slider and simulate the recording performance of a disk drive system with the magnetic disk at the first spacing. The disk drive test system may then transfer a control signal to a heating element in the slider to move the slider to a different spacing between the magnetic disk and the slider to simulate the recording performance of another disk drive system. The test system may, thus, use a single slider to certify a magnetic disk with a plurality of disk drive systems.

摘要翻译： 描述了磁盘驱动器系统和相关方法，用于在安装之前用多个磁盘驱动器系统测试用于认证的磁盘性能。 测试系统可以将滑块定位在滑块中的磁盘之间的第一间隔处，并以第一间距模拟磁盘驱动器系统的记录性能。 然后，磁盘驱动器测试系统可以将控制信号传送到滑块中的加热元件，以将滑块移动到磁盘和滑块之间的不同间隔，以模拟另一磁盘驱动器系统的记录性能。 因此，测试系统可以使用单个滑动器来证实具有多个磁盘驱动器系统的磁盘。

公开(公告)号：US07121133B2

公开(公告)日：2006-10-17

申请号：US10857195

申请日：2004-05-28

申请人： Norman Chu ,  Shanlin Duan ,  Patricia Galindo ,  Hang Fai Ngo ,  Yu Lo ,  Nalin Zhou

发明人： Norman Chu ,  Shanlin Duan ,  Patricia Galindo ,  Hang Fai Ngo ,  Yu Lo ,  Nalin Zhou

IPC分类号： G01B7/34

CPC分类号： G11B5/6005 ,  G11B5/455

摘要： A glide head calibration technique uses two fly height calibrations on a disk media certifier. The first calibration point uses a spin down on bump technique at a first height, and the second calibration point uses a spin down on disk media roughness at a second lower height. With two height data points, a fly height curve of each glide head is approximated very accurately. Once the fly height curve is derived for each head, any fly height can be dialed-in by the disk media certifier for glide testing. This technique achieves glide fly heights between about 4 nm and 8 nm and does so with improved tolerances.

摘要翻译： 滑动头校准技术在磁盘介质验证器上使用两个飞行高度校准。 第一个校准点在第一个高度上使用一个旋转凹凸技术，第二个校准点在第二个较低高度的磁盘介质粗糙度上使用旋转。 使用两个高度数据点，每个滑行头的飞行高度曲线非常准确地近似。 一旦为每个头部导出了飞行高度曲线，则可以通过磁盘媒体验证者拨打任何飞行高度进行滑行测试。 该技术实现了约4nm和8nm之间的滑翔飞行高度，并且具有改进的公差。

公开(公告)号：US06314814B1

公开(公告)日：2001-11-13

申请号：US09516369

申请日：2000-03-01

申请人： James Hammond Brannon ,  Shanlin Duan ,  Wai Cheung Leung ,  Yan Liu ,  Li Tang

发明人： James Hammond Brannon ,  Shanlin Duan ,  Wai Cheung Leung ,  Yan Liu ,  Li Tang

IPC分类号： G01L900

CPC分类号： G11B5/6005 ,  G11B5/58

摘要： A method and apparatus for precise measurement of pressure dependence of head fly height using transitional thermal signals is disclosed. A slider is positioned relative to a rotating a disk having at least one laser bump. Calibration data is gathered by decreasing the pressure and measuring the fly height until a contact positive TA signal is detected. A non-contact negative TA signal is then normalized using the gathered calibration data. The TA signal amplitude may then be used to ascertain the fly height and pressure for a head.

摘要翻译： 公开了使用过渡热信号精确测量头部飞行高度的压力依赖性的方法和装置。 滑块相对于具有至少一个激光凸块的旋转盘定位。 通过降低压力和测量飞行高度来收集校准数据，直到检测到接触正的TA信号。 然后使用收集的校准数据对非接触负TA信号进行归一化。 然后可以使用TA信号幅度来确定头部的飞行高度和压力。

公开(公告)号：US08133530B2

公开(公告)日：2012-03-13

申请号：US12220238

申请日：2008-07-22

申请人： Shanlin Duan ,  Kenneth Johnson ,  Owen Melroy

发明人： Shanlin Duan ,  Kenneth Johnson ,  Owen Melroy

IPC分类号： B05D5/12

CPC分类号： G11B5/82 ,  G11B5/64 ,  G11B5/7325 ,  G11B5/855

摘要： One-sided magnetic media for a hard disk drive. Methods are implemented to create a magnetic media with only one surface capable of recording data. The second surface is a non-data recording side of the media and is constructed so that it does not interfere with the recording properties of the recording side or the structural usefulness of the media. Additionally, the second surface can be a low quality surface capable of limited magnetic recording.

摘要翻译： 用于硬盘驱动器的单面磁性介质。 实现方法来创建仅具有能够记录数据的一个表面的磁介质。 第二表面是介质的非数据记录侧，并且被构造成使其不干扰记录侧的记录特性或介质的结构有用性。 此外，第二表面可以是能够限制磁记录的低质量表面。

公开(公告)号：US07946156B2

公开(公告)日：2011-05-24

申请号：US11964688

申请日：2007-12-26

申请人： Shanlin Duan ,  Jizhong He ,  Bruno Marchon ,  Ullal V. Nayak

发明人： Shanlin Duan ,  Jizhong He ,  Bruno Marchon ,  Ullal V. Nayak

IPC分类号： G11B5/455 ,  G01B7/34 ,  G01B5/28

CPC分类号： G11B5/455 ,  G11B5/3136

摘要： Glide test systems and associated methods are described. A glide test system includes a glide test head that is flown over the surface of a recording disk to detect asperities on the recording disk. The glide test head includes a detection pad on the trailing end of the head. Heating elements are fabricated proximate to the detection pad. The heating elements are independently controllable to control the amount of protrusion of different regions of the detection pad. The heating elements thus provide a way to substantially flatten the detection surface of the detection pad, and compensate for an uneven topography on a detection surface.

摘要翻译： 描述了滑翔测试系统和相关方法。 滑行测试系统包括滑动测试头，其在记录盘的表面上流动以检测记录盘上的凹凸。 滑行测试头包括头部尾端上的检测垫。 在检测板附近制造加热元件。 加热元件可独立控制，以控制检测垫的不同区域的突出量。 因此，加热元件提供了使检测焊盘的检测表面基本平坦化并且补偿检测表面上不均匀的形貌的方法。