公开(公告)号：US5200867A

公开(公告)日：1993-04-06

申请号：US724696

申请日：1991-07-02

申请人： Thomas R. Albrecht ,  John S. Foster ,  Andrew M. Homola

发明人： Thomas R. Albrecht ,  John S. Foster ,  Andrew M. Homola

IPC分类号： G11B21/21 ,  G11B25/04

CPC分类号： G11B21/21 ,  G11B25/043

摘要： A disk file with substantially reduced head-disk spacing and corresponding improvement in recording performance uses a disk coated with a film of conventional high viscosity lubricant, a lubricant reservoir for replenishing the lubricant on the disk over the life of the file, and a transducer carrier with feet which ski on the high viscosity liquid film. The file does not include any means for recirculating the lubricant since the lubricant spins off the disk at a relatively low rate due to its high viscosity. The lubricant reservoir contains a very small amount of lubricant and thus may be maintained inside the substantially sealed disk file. In one embodiment of the invention, the sealed disk file is essentially evacuated. The operation of the disk file in a near vacuum environment is possible because, unlike conventional disk files, air is not required to support an air-bearing head-disk interface and the high vapor pressure of the relatively high molecular weight lubricant prevents its evaporation.

公开(公告)号：US08665549B2

公开(公告)日：2014-03-04

申请号：US13249041

申请日：2011-09-29

申请人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

发明人： Thomas R. Albrecht ,  Toshiki Hirano ,  Tetsuo Semba ,  Xiaotian Sun

IPC分类号： G11B21/02 ,  G11B5/82

CPC分类号： G11B5/59688 ,  G11B5/59655

摘要： A magnetic data storage system having a magnetic disk having burst patterns for providing a position error signal (PES) wherein each magnetic burst pattern is offset from an adjacent burst pattern by ¼ track pitch. All of the magnetic bits of the burst patterns can be unipolar magnetized, and the bits of each burst pattern can be aligned with one another in radial and circumferential direction. The magnetic media can be a bit patterned media wherein the magnetic bits of the burst patterns are magnetically isolated portions separated by non-magnetic spaces or non-magnetic material.

摘要翻译： 一种磁数据存储系统，具有具有用于提供位置误差信号（PES）的脉冲串模式的磁盘，其中每个磁脉冲串模式从相邻脉冲串模式偏移1/4声道间距。 突发图案的所有磁位可以是单极磁化的，并且每个突发图案的位可以在径向和圆周方向上彼此对准。 磁介质可以是位图形介质，其中突发图案的磁位是被非磁性空间或非磁性材料隔开的磁隔离部分。

公开(公告)号：US20130329315A1

公开(公告)日：2013-12-12

申请号：US13492880

申请日：2012-06-10

申请人： Thomas R. Albrecht ,  Michael Konrad Grobis

发明人： Thomas R. Albrecht ,  Michael Konrad Grobis

IPC分类号： G11B21/02 ,  G11B19/20

CPC分类号： G11B5/5965 ,  G11B5/59666

摘要： A patterned-media magnetic recording disk drive has head positioning servo sectors on the disk that do not contain special patterns but merely use the same type of dots that are used for data. The “data” dots in angularly spaced sectors of the data tracks function as the servo sectors and are denoted as D-servo regions. The D-servo regions extend across an annular band of the disk, which may be a bootstrap band for self-servowriting. The dots in the annular band are randomly magnetized so that each track in each D-servo region provides a generally random readback signal at the data frequency. The precise radial and circumferential position of the read/write head within a D-servo region is determined by comparing the readback signal with a set of reference signal waveforms from a look-up reference table and finding the reference signal waveform that matches the readback signal.

摘要翻译： 图形介质磁记录磁盘驱动器在磁盘上具有不包含特殊图案的头部定位伺服扇区，但仅使用与数据相同类型的点。 数据轨道的角度间隔扇区中的“数据”点用作伺服扇区，并被表示为D伺服区域。 D伺服区域延伸穿过盘的环形带，其可以是用于自伺服驱动的自举带。 环形带中的点被随机磁化，使得每个D伺服区域中的每个轨道在数据频率处提供大致随机的回读信号。 通过将读回信号与来自查找参考表的一组参考信号波形进行比较并找到与回读信号相匹配的参考信号波形来确定读/写头在D伺服区域内的精确径向和圆周位置 。

公开(公告)号：US08526132B2

公开(公告)日：2013-09-03

申请号：US12699581

申请日：2010-02-03

申请人： Thomas R. Albrecht ,  Masahito Kobayashi ,  Keishi Takahashi ,  Kei Yasuna

发明人： Thomas R. Albrecht ,  Masahito Kobayashi ,  Keishi Takahashi ,  Kei Yasuna

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

CPC分类号： G11B5/596 ,  G11B15/18

摘要： Embodiments herein illustrate patterned servo data that allows the patterned disk to be planarized with a relatively simple planarization process. A magnetic disk, in this regard, includes a data region having a plurality of tracks. The magnetic disk also includes a plurality of servo bursts patterned in the magnetic disk at a plurality of locations in each track. The servo bursts are operable to direct a controller to center a write head over a track in the data region and write a track identification. The servo bursts include magnetic lands and nonmagnetic grooves. The magnetic lands of the servo burst are generally configured with a uniform polarity of magnetization and a first uniform width. The nonmagnetic grooves are configured with a second uniform width.

摘要翻译： 本文的实施例示出了图案化的伺服数据，其允许图案化的盘通过相对简单的平坦化处理来平坦化。 在这方面，磁盘包括具有多个轨道的数据区域。 磁盘还包括在每个轨道中的多个位置处在磁盘中图案化的多个伺服脉冲串。 伺服突发可操作以引导控制器将写头置于数据区域中的轨道上，并写入轨迹标识。 伺服脉冲串包括磁场和非磁性凹槽。 伺服脉冲串的磁场通常被配置为具有均匀的磁化极性和第一均匀宽度。 非磁性槽配置有第二均匀宽度。

公开(公告)号：US08119017B2

公开(公告)日：2012-02-21

申请号：US12141062

申请日：2008-06-17

申请人： Thomas R. Albrecht ,  Ricardo Ruiz

发明人： Thomas R. Albrecht ,  Ricardo Ruiz

IPC分类号： B44C1/22 ,  C03C15/00 ,  C03C25/68 ,  H01L21/302 ,  H01L21/461

CPC分类号： G11B5/855

摘要： The invention is a method for making a master mold to be used for nanoimprinting patterned-media magnetic recording disks. The method uses conventional optical or e-beam lithography to form a pattern of generally radial stripes on a substrate, with the stripes being grouped into annular zones or bands. A block copolymer material is deposited on the pattern, resulting in guided self-assembly of the block copolymer into its components to multiply the generally radial stripes into generally radial lines of alternating block copolymer components. The radial lines of one of the components are removed and the radial lines of the remaining component are used as an etch mask to etch the substrate. Conventional lithography is used to form concentric rings over the generally radial lines. After etching and resist removal, the master mold has pillars arranged in circular rings, with the rings grouped into annular bands.

摘要翻译： 本发明是用于制造用于纳米压印图案化介质磁记录盘的母模的方法。 该方法使用常规光学或电子束光刻在基底上形成大致径向条纹的图案，其中条纹被分组成环形区域或条带。 嵌段共聚物材料沉积在图案上，导致嵌段共聚物引导自组装成其组分，以将大致径向的条带乘以交替的嵌段共聚物组分的大致径向线。 除去其中一个部件的径向线，并且将其余部件的径向线用作蚀刻掩模以蚀刻基板。 常规光刻用于在大致径向线上形成同心环。 在蚀刻和抗蚀剂去除之后，主模具有布置成圆形环的柱，其中环被分组成环形带。

公开(公告)号：US20110188152A1

公开(公告)日：2011-08-04

申请号：US12699501

申请日：2010-02-03

申请人： Thomas R. Albrecht ,  Kurt A. Rubin

发明人： Thomas R. Albrecht ,  Kurt A. Rubin

IPC分类号： G11B21/02 ,  G11B5/82

CPC分类号： G11B5/82 ,  G11B21/02

摘要： Embodiments herein illustrate patterned servo data that is used to facilitate subsequent servo writing to a magnetic disk while allowing the patterned disk to be planarized with a relatively simple planarization process. One disk drive system includes a magnetic disk that is patterned with magnetic lands and nonmagnetic grooves. The magnetic disk also includes bootstrap bands that may be configured at an inner diameter of the magnetic disk. The magnetic lands of the bootstrap bands have varying sizes and are patterned as servo data having a uniform polarity of magnetization. The bootstrap bands have a width that is sufficiently narrow to support an air bearing surface of a slider. The data tracks are circumferentially configured proximate to the bootstrap bands. The slider reads the patterned servo data to facilitate writing of additional servo data in the data tracks.

摘要翻译： 本文的实施例示出了图案化的伺服数据，其被用于有助于随后的伺服写入到磁盘，同时通过相对简单的平坦化处理平面化图案化的盘。 一个磁盘驱动器系统包括用磁性层和非磁性凹槽构图的磁盘。 磁盘还包括可以配置在磁盘的内径处的引导带。 自举带的磁性区域具有不同的尺寸，并且被图案化为具有均匀的磁化极性的伺服数据。 自举带具有足够窄的宽度以支撑滑块的空气支承表面。 数据轨道在引导带附近是周向配置的。 滑块读取图案化的伺服数据，以便于在数据轨道中写入附加的伺服数据。

公开(公告)号：US07981533B2

公开(公告)日：2011-07-19

申请号：US12788931

申请日：2010-05-27

申请人： Thomas R. Albrecht

发明人： Thomas R. Albrecht

IPC分类号： G11B5/66

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

摘要： A method for making a master disk to be used for nanoimprinting patterned-media magnetic recording disks uses sidewall lithography. In one implementation, the master disk substrate has a first pattern of concentric rings formed on it by sidewall lithography, followed by a second pattern of generally radially-directed pairs of parallel lines, also formed by sidewall lithography, with the pairs of parallel lines intersecting the rings. An etching process is then performed, using the upper pattern as an etch mask, to remove unprotected portions of the underlying concentric rings. This leaves a pattern of pillars on the substrate, which then serve as an etch mask for an etching process that etches unprotected portions of the master disk substrate. The resulting master disk then has pillars of substrate material arranged in a pattern of concentric rings and generally radially-directed pairs of parallel lines.

摘要翻译： 用于制造用于纳米压印图案化介质磁记录盘的母盘的方法使用侧壁光刻。 在一个实施方案中，母盘基板具有通过侧壁光刻在其上形成的同心环的第一图案，随后是也通过侧壁光刻形成的大体上径向指向的一对平行线的第二图案，并且所述平行线对相交 戒指。 然后使用上部图案作为蚀刻掩模进行蚀刻工艺，以去除下面的同心环的未受保护的部分。 这在衬底上留下了柱状图案，其然后用作用于蚀刻母盘衬底的未受保护部分的蚀刻工艺的蚀刻掩模。 所得到的母盘然后具有以同心环和大体上径向指向的平行线对图案布置的基底材料柱。

公开(公告)号：US07911728B2

公开(公告)日：2011-03-22

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： G11B21/02 ,  G11B5/09

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：US20100233517A1

公开(公告)日：2010-09-16

申请号：US12788931

申请日：2010-05-27

申请人： Thomas R. Albrecht

发明人： Thomas R. Albrecht

IPC分类号： G11B5/712 ,  B05D5/00 ,  B44C1/22

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

摘要： A method for making a master disk to be used for nanoimprinting patterned-media magnetic recording disks uses sidewall lithography. In one implementation, the master disk substrate has a first pattern of concentric rings formed on it by sidewall lithography, followed by a second pattern of generally radially-directed pairs of parallel lines, also formed by sidewall lithography, with the pairs of parallel lines intersecting the rings. An etching process is then performed, using the upper pattern as an etch mask, to remove unprotected portions of the underlying concentric rings. This leaves a pattern of pillars on the substrate, which then serve as an etch mask for an etching process that etches unprotected portions of the master disk substrate. The resulting master disk then has pillars of substrate material arranged in a pattern of concentric rings and generally radially-directed pairs of parallel lines.

摘要翻译： 用于制造用于纳米压印图案化介质磁记录盘的母盘的方法使用侧壁光刻。 在一个实施方案中，母盘基板具有通过侧壁光刻在其上形成的同心环的第一图案，随后是也通过侧壁光刻形成的大致径向定向的一对平行线的第二图案，并且所述平行线对相交 戒指。 然后使用上部图案作为蚀刻掩模进行蚀刻工艺，以去除下面的同心环的未受保护的部分。 这在衬底上留下了柱状图案，其然后用作用于蚀刻母盘衬底的未受保护部分的蚀刻工艺的蚀刻掩模。 所得到的母盘然后具有以同心环和大体上径向指向的平行线对图案布置的基底材料柱。

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。