公开(公告)号：US20100147797A1

公开(公告)日：2010-06-17

申请号：US12711987

申请日：2010-02-24

申请人： Thomas R. Albrecht ,  Dennis R. McKean ,  Gurinder Pal Singh ,  Henry Hung Yang

发明人： Thomas R. Albrecht ,  Dennis R. McKean ,  Gurinder Pal Singh ,  Henry Hung Yang

IPC分类号： C23F1/02

CPC分类号： G11B5/855

摘要： A system and method for patterning a master disk or “stamper” to be used for nanoimprinting magnetic recording disks uses an air-bearing slider that supports an aperture structure within the optical near-field of a resist layer on a rotating master disk substrate. Laser pulses directed to the input side of the aperture are output to the resist layer. The aperture structure includes a metal film reflective to the laser radiation with the aperture formed in it. The aperture has a size less than the wavelength of the incident laser radiation and is maintained by the air-bearing slider near the resist layer to within the radiation wavelength. The timing of the laser pulses is controlled to form a pattern of exposed regions in the resist layer, with this pattern ultimately resulting in the desired pattern of data islands and nondata islands in the magnetic recording disks when they are nanoimprinted by the master disk.

摘要翻译： 用于图形化用于纳米压印磁记录盘的母盘或“压模”的系统和方法使用支撑旋转母盘衬底上的抗蚀剂层的光学近场内的孔结构的空气轴承滑块。 指向孔径输入侧的激光脉冲输出到抗蚀剂层。 孔结构包括反射激光辐射的金属膜，其中形成有孔。 孔径的尺寸小于入射激光辐射的波长，并且由抗蚀剂层附近的空气轴承滑块维持在辐射波长内。 控制激光脉冲的定时以形成抗蚀剂层中的暴露区域的图案，当这些图案被母盘纳米压印时，该图案最终导致磁记录盘中的数据岛和非数据岛的期望图案。

公开(公告)号：US20100128583A1

公开(公告)日：2010-05-27

申请号：US12324431

申请日：2008-11-26

申请人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

发明人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

IPC分类号： G11B20/10

CPC分类号： G11B5/5965 ,  G11B2020/1281 ,  G11B2220/2516

摘要： A servowriting method for a patterned-media magnetic recording disk uses a special position error signal (PES) alignment pattern located in each servo sector. A gross feedforward correction signal to compensate for gross eccentricity of the disk relative to the center of rotation of the servowriter spindle is applied to the actuator. With the gross feedforward correction applied to the actuator the read head generally follows a data track centerline and will detect signals from PES alignment fields as each servo sector passes the read head. This results in a readback signal at each servo sector that represents the fractional track-width radial offset of the read head in that servo sector from a data track centerline. The set of radial offsets for all of the servo sectors is used to modify or fine tune the gross feedforward correction signal that is applied during the servowrite process. This enables the servowriter write head to then precisely follow a track centerline so that the discrete islands in the PES fields can be magnetized according to the desired pattern.

摘要翻译： 用于图案化介质磁记录盘的伺服驱动方法使用位于每个伺服扇区中的特殊位置误差信号（PES）对准图案。 用于补偿盘相对于伺服驱动器主轴的旋转中心的总偏心率的总前馈校正信号被施加到致动器。 通过对致动器进行总前馈校正，读取头通常遵循数据轨道中心线，并且将在每个伺服扇区通过读取头时检测来自PES对准场的信号。 这导致在每个伺服扇区处的回读信号，其表示来自数据轨道中心线的该伺服扇区中的读头的分数轨迹宽度径向偏移。 用于所有伺服扇区的一组径向偏移用于修改或微调在伺服写入过程中应用的总前馈校正信号。 这使得伺服驱动器写头然后精确地跟随轨道中心线，使得PES场中的离散岛可以根据期望的图案被磁化。

公开(公告)号：US20100073819A1

公开(公告)日：2010-03-25

申请号：US12627621

申请日：2009-11-30

申请人： Thomas R. Albrecht ,  Zvonimir Z. Bandic ,  Xiao Z. Wu

发明人： Thomas R. Albrecht ,  Zvonimir Z. Bandic ,  Xiao Z. Wu

IPC分类号： G11B5/82 ,  G11B5/84

CPC分类号： G11B5/5965

摘要： Servo patterns and associated methods of fabricating servo patterns are described. For patterned storage media, data sectors and servo sectors may be patterned using self-assembly. In one embodiment, self-assembly is used to form a first array of islands and a second array of islands in servo sectors that are track-wise offset. A servo writing process is then performed to write a desired servo pattern in the arrays, such as for burst fields, synchronization fields, etc.

摘要翻译： 描述了制造伺服模式的伺服模式和相关方法。 对于图案化存储介质，可以使用自组装图案化数据扇区和伺服扇区。 在一个实施例中，自组装被用于形成第一阵列阵列和在跟踪方向偏移的伺服扇区中的岛的第二阵列。 然后执行伺服写入处理以在阵列中写入期望的伺服模式，例如用于突发字段，同步字段等。

公开(公告)号：US20090109569A1

公开(公告)日：2009-04-30

申请号：US11932608

申请日：2007-10-31

申请人： Thomas R. Albrecht ,  Xing-Cai Guo ,  Bruno Marchon

发明人： Thomas R. Albrecht ,  Xing-Cai Guo ,  Bruno Marchon

IPC分类号： G11B5/187 ,  G03F7/20

CPC分类号： G11B5/82 ,  B82Y10/00 ,  B82Y40/00 ,  G03F7/0002 ,  G11B5/743 ,  G11B5/855

摘要： An apparatus, system, and method are disclosed for guided growth of patterned media using monodisperse nanospheres. The apparatus includes nanoscale features extending from a substrate. The nanoscale features may be formed using electron-beam lithography and have a non-uniform cap. A spherical cap is formed on the non-uniform cap by hydrolysis and precipitation of monodisperse nanospheres on an immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature. The system includes the apparatus and further includes monodisperse nanospheres formed of silicon dioxide spheres. The method includes providing a substrate, etching at least one nanoscale feature extending from the substrate, the feature formed using electron-beam lithography and having a non-uniform cap, forming an immobilized nucleation site, and forming a spherical cap by hydrolysis and precipitation of monodisperse nanospheres on the immobilized nucleation site, the immobilized nucleation site attached with one end of the nanoscale feature.

摘要翻译： 公开了使用单分散纳米球引导生长图案化介质的装置，系统和方法。 该装置包括从衬底延伸的纳米尺度特征。 可以使用电子束光刻形成纳米尺度特征并具有不均匀的盖。 通过在固定化的成核位点上水解和沉淀单分散纳米球，在不均匀的帽上形成球形帽，固定的成核位置与纳米尺度特征的一端相连。 该系统包括该装置，并且还包括由二氧化硅球形成的单分散纳米球。 该方法包括提供衬底，蚀刻从衬底延伸的至少一个纳米尺度特征，使用电子束光刻形成的特征并具有不均匀的盖，形成固定的成核位点，并通过水解和沉淀形成球形帽 在固定的成核位点上的单分散纳米球，固定的成核位点附着在纳米尺度特征的一端。

公开(公告)号：US20090067082A1

公开(公告)日：2009-03-12

申请号：US11852252

申请日：2007-09-07

申请人： Thomas R. Albrecht

发明人： Thomas R. Albrecht

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/3967 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B2005/0002

摘要： A patterned-media magnetic recording disk has data islands arranged into concentric data tracks and the data tracks arranged into radially-spaced annular zones, with each zone having an inside-diameter (ID) perimeter and an outside-diameter (OD) perimeter and at least one annular nondata region near one of its perimeters. Each zone includes generally radially-directed synchronization (sync) marks that extend from the zone ID perimeter to the zone OD perimeter so as to extend into the annular nondata region or regions of the zone. In the disk drive that uses the patterned-media disks the read head and write head have an effective radial offset relative to one another, so the write head may be on a data track near a zone perimeter when the read head is located in a nondata region. The read head detects the sync marks that extend into the nondata region so that the write head can be synchronized with the data islands in the data track.

摘要翻译： 图形介质磁记录盘具有排列成同心数据轨道的数据岛和布置成径向间隔的环形区域的数据轨道，每个区域具有内径（ID）周长和外径（OD）周长 在其周边的一个附近的至少一个环形非圆形区域。 每个区域包括从区域ID周边延伸到区域OD周边的大体上径向定向的同步（sync）标记，以便延伸到区域的环形非区域或区域中。 在使用图案化介质盘的磁盘驱动器中，读头和写头相对于彼此具有有效的径向偏移，因此当读头位于非数据位时，写头可以在区周边附近的数据轨道上 地区。 读取头检测延伸到非数据区域的同步标记，使得写入头可以与数据轨道中的数据岛同步。

公开(公告)号：US20080316638A1

公开(公告)日：2008-12-25

申请号：US11765335

申请日：2007-06-19

申请人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

发明人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

IPC分类号： G11B5/596

CPC分类号： G11B5/5547

摘要： A magnetic recording disk drive has disks with identical pre-patterned servo patterns on their front and back surfaces and a servo control system for positioning the read/write heads using the servo signals from the identical servo patterns. The servo sectors on the two disk surfaces form identical patterns of angularly spaced arcuate-shaped lines that extend generally radially across the data tracks. The arcuate-shaped lines on one surface, the front surface, generally replicate the path of the recording head as it is moved across the data tracks by a rotary actuator, so that there is a constant sampling rate of the servo sectors on the front surface regardless of radial position of the head. However, the arcuate-shaped lines on the other surface, the back surface, do not replicate the path of the recording head so the servo sampling rate is not constant but varies with radial position of the head. The disk drive servo control system implements a method to enable track seeking from one data track to another data track, regardless of whether the initial disk surface and the destination disk surface are front or back surfaces.

摘要翻译： 磁记录盘驱动器具有在其前表面和后表面上具有相同的预构图伺服图案的盘，以及用于使用来自相同伺服图案的伺服信号来定位读/写头的伺服控制系统。 两个磁盘表面上的伺服扇区形成相同的角度间隔的弓形线的图案，其大致径向延伸穿过数据轨道。 在一个表面上的弧形线，前表面，通常通过旋转致动器复制记录头的路径，使其在前表面上具有恒定的伺服扇区采样率 不管头部的径向位置如何。 然而，另一个表面上的弧形线，即背面不会复制记录头的路径，所以伺服采样速率不是恒定的，而是随着磁头的径向位置而变化。 磁盘驱动器伺服控制系统实现了一种使得能够从一个数据轨道追踪到另一个数据轨道的方法，而不管初始磁盘表面和目标磁盘表面是前表面还是后表面。

公开(公告)号：US07277252B1

公开(公告)日：2007-10-02

申请号：US11289093

申请日：2005-11-29

申请人： Thomas R. Albrecht ,  Peter M. Baumgart ,  Bernhard E. Knigge

发明人： Thomas R. Albrecht ,  Peter M. Baumgart ,  Bernhard E. Knigge

IPC分类号： G11B21/02 ,  G11B5/596 ,  G11B5/55

CPC分类号： G11B5/6017

摘要： In a method of feedback control for active damping of slider air bearing vibrations in a hard disk drive slider, a slider is isolated from ground. A slider velocity signal is filtered to acquire a vibration signal. The vibration signal is adjusted in amplitude to achieve an amplitude adjusted vibration signal. The amplitude adjusted vibration signal is applied to the slider to actively dampen air bearing vibrations in the slider.

摘要翻译： 在用于在硬盘驱动器滑块中滑块空气轴承振动的主动阻尼的反馈控制的方法中，滑块与地面隔离。 滑块速度信号被滤波以获取振动信号。 振幅信号的幅度进行调整，以实现振幅调节的振动信号。 振幅调节振动信号被施加到滑块以主动地抑制滑块中的空气轴承振动。

公开(公告)号：US07236325B2

公开(公告)日：2007-06-26

申请号：US11149028

申请日：2005-06-09

申请人： Thomas R. Albrecht ,  Zvonimir Bandic

发明人： Thomas R. Albrecht ,  Zvonimir Bandic

IPC分类号： G11B5/596 ,  G11B5/09 ,  G11B21/02

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/59688 ,  G11B5/743 ,  G11B5/855

摘要： A method for formatting a magnetic recording disk with patterned nondata islands having alternating magnetization polarity in the along-the-track direction involves clocking write pulses to switch the magnetization direction of alternate, i.e., every other, nondata island. The clocking is controlled by the previously determined phase of the regions containing the nondata islands and the known offset along-the-track between the read head and write head. In each nondata region, every other nondata island in the along-the track direction has the same magnetization direction, with adjacent nondata islands having antiparallel magnetization directions. The disk may be either a horizontal magnetic recording disk, wherein the antiparallel magnetization directions are in the plane of the recording layer and parallel to the along-the-track direction, or a perpendicular magnetic recording disk, wherein the antiparallel the magnetization directions are “into” and “out of” the recording layer.

摘要翻译： 用于格式化具有沿着磁道方向具有交变磁化极性的图案化非磁性岛的磁记录盘的方法包括计时写入脉冲以切换交替的，即每隔一个的非磁化岛的磁化方向。 时钟由先前确定的包含非数据岛的区域以及读头和写头之间沿着轨道的已知偏移量控制。 在每个非数据区域中，沿轨道方向的每隔一个非数据岛具有相同的磁化方向，相邻的非数据岛具有反平行的磁化方向。 盘可以是水平磁记录盘，其中反平行磁化方向在记录层的平面中并且平行于轨道方向，或垂直磁记录盘，其中反并联的磁化方向为“ 进入“和”离开“记录层。

公开(公告)号：US06798590B2

公开(公告)日：2004-09-28

申请号：US10055638

申请日：2002-01-22

申请人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

发明人： Thomas R. Albrecht ,  Zvonimir Z. Bandic

IPC分类号： G11B586

CPC分类号： G11B5/865

摘要： A contact magnetic transfer method for forming a pattern of magnetized servo regions in the magnetic recording layer of a rigid magnetic recording disk uses a flexible master disk and a differential gas pressure to press the patterns of the master disk against the slave disk. The master disk is a flexible plastic film with islands of magnetic shielding material extending above the film surface, the islands forming a pattern representative of the servo pattern to be formed in the recording layer of the disk. The plastic film is sealed at the outer periphery of the opening of a pressure chamber with the islands located outside the chamber. The previously DC-magnetized slave disk is brought into gentle contact with the islands and gas pressure inside the chamber is increased to slightly above atmospheric. This controlled pressure presses the islands into contact with the slave disk, at which time a magnet magnetizes the regions of the recording layer not aligned with the islands in the direction opposite to the original DC-magnetized direction. The magnet is located on a rotatable stage within the chamber beneath the plastic film and mounted so that the length of the gap is in the radial direction corresponding to the radius of the slave disk.

摘要翻译： 用于在刚性磁记录盘的磁记录层中形成磁化伺服区的图案的接触磁转移方法使用柔性母盘和差压气体压力将母盘的图案压靠在从盘上。 主盘是具有在膜表面上延伸的磁屏蔽材料岛的柔性塑料膜，岛形成表示要在盘的记录层中形成的伺服图案的图案。 塑料薄膜密封在压力室的开口的外周，其中岛位于室外。 先前的DC磁化从盘与岛温和接触，并且室内的气体压力增加到略高于大气压。 该受控压力使岛与从盘接触，此时，磁体在与原始DC磁化方向相反的方向上磁化记录层的不与岛对准的区域。 磁体位于塑料膜下方的室内的可旋转台上，并且安装成使得间隙的长度在与从盘的半径相对应的径向方向上。

公开(公告)号：US06643087B1

公开(公告)日：2003-11-04

申请号：US09519142

申请日：2000-03-06

申请人： Kenji Kuroki ,  Thomas R. Albrecht ,  Fuminori Sai ,  Yuzo Nakagawa ,  Nobuhisa Koide ,  Masashi Murai ,  Keishi Takahashi ,  Timothy C. Reiley ,  Erno H. Klassen

发明人： Kenji Kuroki ,  Thomas R. Albrecht ,  Fuminori Sai ,  Yuzo Nakagawa ,  Nobuhisa Koide ,  Masashi Murai ,  Keishi Takahashi ,  Timothy C. Reiley ,  Erno H. Klassen

IPC分类号： G11B2102

CPC分类号： G11B21/12 ,  G11B19/04

摘要： A method and apparatus to provide a retract circuit that can correspond to the tendency toward miniaturization and low supply voltage. When drive supply voltage Vcc is applied, a retract circuit charges a retract condenser Cr with boosted voltage Vup, equal to three times Vcc, generated by a booster circuit. Then, if the drive supply voltage Vcc is cut off and a VCM driver stops, the retract circuit detects power-off with a power OFF sense circuit, and provides retract delay time by a retract delay circuit. Furthermore, when the retract delay time elapses after the drive power supply is turned off, the retract driver switches the switching circuits on, discharges the retract condenser, charged at the boosted voltage, supplies discharge current to a voice coil, and retracts the head assembly.

摘要翻译： 一种提供可以对应于小型化和低电源电压趋势的缩回电路的方法和装置。 当施加驱动电源电压Vcc时，后退电路对由升压电路产生的升压电压Vup等于三倍Vcc充电回缩电容器Cr。 然后，如果驱动器电源电压Vcc被切断并且VCM驱动器停止，则缩回电路用电源OFF感测电路检测掉电，并且通过缩回延迟电路提供缩回延迟时间。 此外，当在驱动电源关闭之后经过缩回延迟时间时，后退驱动器接通开关电路，放电收缩冷凝器，以升压电压充电，向扬声器提供放电电流，并使头部组件 。