公开(公告)号：US08270256B1

公开(公告)日：2012-09-18

申请号：US13102959

申请日：2011-05-06

申请人： Jia-Yang Juang ,  Hal J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

发明人： Jia-Yang Juang ,  Hal J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/012 ,  G11B5/315 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted recording (TAR) disk drive uses a “wide-area” heater with “shingled” recording. In shingled recording, the write head pole tip is wider than the read head in the cross-track direction and writes magnetic transitions by making a plurality of consecutive circular paths that partially overlap. The non-overlapped portions of adjacent paths form the data tracks, which are thus narrower than the width of the write pole tip. The data tracks are grouped into annular bands and when data is to be rewritten, all of the data tracks in an annular band are also rewritten. The wide-area heater may be a waveguide with an output end that generates a heated area on the disk recording layer which is wider than the cross-track width of the write pole tip. It has been determined that the use of a wide-area heater with shingled recording does not result in any significant adjacent track erasure (ATE).

摘要翻译： 热辅助记录（TAR）磁盘驱动器使用“广域”加热器，“带状”录音。 在带状闪烁的记录中，写头磁极尖在交叉磁道方向上比读取头宽，并且通过使多个部分重叠的连续圆形路径写入磁转变。 相邻路径的非重叠部分形成数据轨道，因此比写入磁极尖端的宽度窄。 数据轨道被分组成环形带，并且当数据被重写时，环形带中的所有数据轨迹也被重写。 广域加热器可以是具有输出端的波导，该输出端在盘记录层上产生比写极尖的横越轨道宽度更宽的加热区域。 已经确定，使用具有带灰度记录的广域加热器不会导致任何显着的相邻轨道擦除（ATE）。

公开(公告)号：US08416646B2

公开(公告)日：2013-04-09

申请号：US13190410

申请日：2011-07-25

申请人： Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

发明人： Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B11/00

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted recording (TAR) disk drive uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source. The waveguide generates a generally elliptically-shaped optical spot that heats an area of the recording layer extending across multiple data tracks. The waveguide core has an aspect ratio (cross-track width to along-the track thickness) that achieves the desired size of the heated area while locating the peak optical intensity close to the trailing edge of the write pole tip where writing occurs. The large cross-track width of the waveguide core increases the volume of recording layer heated by the optical spot, which reduces the rate of cooling. This moves the peak temperature point of the heated area closer to the write pole tip and reduces the temperature drop between the peak temperature and the temperature at the trailing edge of the write pole tip where writing occurs.

摘要翻译： 热辅助记录（TAR）磁盘驱动器使用带状闪烁的记录和矩形波导作为广域热源。 波导产生大致椭圆形的光点，其加热跨越多个数据轨道的记录层的区域。 波导芯具有实现加热区域的期望尺寸的纵横比（沿轨道厚度的横越轨道宽度），同时将峰值光强度定位在写入发生时写入磁极尖端的后缘附近。 波导芯的大的横向轨道宽度增加了由光点加热的记录层的体积，这降低了冷却速度。 这使得加热区域的峰值温度点更接近写极端，并且降低峰值温度与写入磁极尖端的后缘处的温度之间的温度下降。

公开(公告)号：US20130028059A1

公开(公告)日：2013-01-31

申请号：US13190410

申请日：2011-07-25

申请人： Fu-Ying Huang ,  Jia-Yang Juang ,  Hai J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

发明人： Fu-Ying Huang ,  Jia-Yang Juang ,  Hai J. Rosen ,  Barry Cushing Stipe ,  Timothy Carl Strand ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B13/04

CPC分类号： G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted recording (TAR) disk drive uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source. The waveguide generates a generally elliptically-shaped optical spot that heats an area of the recording layer extending across multiple data tracks. The waveguide core has an aspect ratio (cross-track width to along-the track thickness) that achieves the desired size of the heated area while locating the peak optical intensity close to the trailing edge of the write pole tip where writing occurs. The large cross-track width of the waveguide core increases the volume of recording layer heated by the optical spot, which reduces the rate of cooling. This moves the peak temperature point of the heated area closer to the write pole tip and reduces the temperature drop between the peak temperature and the temperature at the trailing edge of the write pole tip where writing occurs.

摘要翻译： 热辅助记录（TAR）磁盘驱动器使用带状闪烁的记录和矩形波导作为广域热源。 波导产生大致椭圆形的光点，其加热跨越多个数据轨道的记录层的区域。 波导芯具有实现加热区域的期望尺寸的纵横比（沿轨道厚度的横越轨道宽度），同时将峰值光强度定位在写入发生时写入磁极尖端的后缘附近。 波导芯的大的横向轨道宽度增加了由光点加热的记录层的体积，这降低了冷却速度。 这使得加热区域的峰值温度点更接近写极端，并且降低峰值温度与写入磁极尖端的后缘处的温度之间的温度下降。

公开(公告)号：US08385162B2

公开(公告)日：2013-02-26

申请号：US13192437

申请日：2011-07-27

申请人： Hal J. Rosen ,  Barry Cushing Stipe ,  Petrus Antonius VanDerHeijden

发明人： Hal J. Rosen ,  Barry Cushing Stipe ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B11/00

CPC分类号： G11B5/02 ,  G11B5/012 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted recording (TAR) disk drive that uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source includes a controller that counts the number of writes to each annular band of data tracks. The wide-area heater generates a heat spot that extends across multiple tracks, so that each time an annular band is written, the data in tracks in adjacent bands are also heated. Because the bands are written independently, the number of passes of the heat spot and thereby the number of times the data tracks in a band are exposed to elevated temperatures without being re-written is related to the number of re-writes of the adjacent bands. The number of writes to each band is counted and when that count reaches a predetermined threshold value, one or more tracks in an adjacent band are re-written to avoid reaching an unacceptable level of magnetization decay in the tracks of the adjacent band.

摘要翻译： 使用带有遮蔽的记录和矩形波导作为广域热源的热辅助记录（TAR）磁盘驱动器包括对数据轨道的每个环形带的写入次数进行计数的控制器。 广域加热器产生一个延伸穿过多个轨迹的热点，因此每次写入一个环形带时，相邻带中轨道中的数据也被加热。 由于频带是独立写入的，所以热点的通过次数以及频带中数据轨迹的次数暴露于升高的温度而不被重新写入与相邻频带的重写次数有关 。 对每个频带的写入次数进行计数，并且当该计数达到预定阈值时，重新写入相邻频带中的一个或多个磁道，以避免在相邻频带的磁道中达到不可接受的磁化衰减水平。

公开(公告)号：US20130028061A1

公开(公告)日：2013-01-31

申请号：US13192437

申请日：2011-07-27

申请人： Hal J. Rosen ,  Barry Cushing Stilpe ,  Petrus Antonius VanDerHeijden

发明人： Hal J. Rosen ,  Barry Cushing Stilpe ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B5/02 ,  G11B13/04

CPC分类号： G11B5/02 ,  G11B5/012 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

摘要： A thermally-assisted recording (TAR) disk drive that uses “shingled” recording and a rectangular waveguide as a “wide-area” heat source includes a controller that counts the number of writes to each annular band of data tracks. The wide-area heater generates a heat spot that extends across multiple tracks, so that each time an annular band is written, the data in tracks in adjacent bands are also heated. Because the bands are written independently, the number of passes of the heat spot and thereby the number of times the data tracks in a band are exposed to elevated temperatures without being re-written is related to the number of re-writes of the adjacent bands. The number of writes to each band is counted and when that count reaches a predetermined threshold value, one or more tracks in an adjacent band are re-written to avoid reaching an unacceptable level of magnetization decay in the tracks of the adjacent band.

摘要翻译： 使用带有遮蔽的记录和矩形波导作为广域热源的热辅助记录（TAR）磁盘驱动器包括对数据轨道的每个环形带的写入次数进行计数的控制器。 广域加热器产生一个延伸穿过多个轨迹的热点，因此每次写入一个环形带时，相邻带中轨道中的数据也被加热。 由于频带是独立写入的，所以热点的通过次数以及频带中数据轨迹的次数暴露于升高的温度而不被重新写入与相邻频带的重写次数有关 。 对每个频带的写入次数进行计数，并且当该计数达到预定阈值时，重新写入相邻频带中的一个或多个磁道，以避免在相邻频带的磁道中达到不可接受的磁化衰减水平。

公开(公告)号：US20080117546A1

公开(公告)日：2008-05-22

申请号：US11560761

申请日：2006-11-16

申请人： Quang Le ,  James L. Nix ,  Neil Leslie Robertson ,  Neil Smith ,  Petrus Antonius VanDerHeijden

发明人： Quang Le ,  James L. Nix ,  Neil Leslie Robertson ,  Neil Smith ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315

摘要： A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor where its blunt end is in contact with the pole tip is the “choke” point for the write pole, i.e., the point where the flux density is highest. The flux conductor enables the write pole to be made with no flare, or with a flare angle and throat height with a much wider tolerance, which substantially simplifies the manufacturing process. The write head may have a trailing shield and side shields that substantially surround the write pole tip and remove stray fields that may be produced by the flux conductor, so that regions of the recording layer other than the track being written are not adversely affected.

摘要翻译： 垂直磁记录写头具有与写极接触的磁通导体。 磁通导体在横向磁道方向上基本上比写入磁极尖端更宽，并且具有从磁极末端凹进的钝端。 其钝端与极尖接触的磁通导体的区域是写极的“扼流”点，即磁通密度最高的点。 磁通导体使写磁极能够制成没有耀斑，或具有更宽公差的喇叭角和喉部高度，这大大简化了制造过程。 写头可以具有基本上围绕写磁极尖端的后屏蔽和侧屏蔽，并且去除可能由磁通导体产生的杂散场，使得除了正在写入的磁道之外的记录层的区域不受不利影响。

公开(公告)号：US20080112079A1

公开(公告)日：2008-05-15

申请号：US11558846

申请日：2006-11-10

申请人： Eric Edward Fullerton ,  Olav Hellwig ,  Jeffrey S. Lille ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden ,  Henry Hung Yang

发明人： Eric Edward Fullerton ,  Olav Hellwig ,  Jeffrey S. Lille ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden ,  Henry Hung Yang

IPC分类号： G11B5/17

CPC分类号： G11B5/855 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325

摘要： A patterned perpendicular magnetic recording medium of the type that has spaced-apart pillars with magnetic material on their ends and with nonmagnetic trenches between the pillars is made with a method that allows use of a pre-etched substrate. The substrate has a generally planar surface at the trenches and comprises material that when heated will diffuse into the magnetic recording layer material and chemically react with one or more of the elements typically used in the recording layer. The pillars are formed of material that will not diffuse into the recording layer. After the recording layer is formed over the entire substrate so as to cover both the pillar ends and the trenches, the substrate is annealed. This results in the destruction or at least substantial reduction of any ferromagnetism in the recording layer material in the trenches so that the trenches are nonmagnetic. The annealing does not affect the recording layer on the ends of the pillars because the pillars are formed of material that will not diffuse into the recording layer.

摘要翻译： 具有在其端部上具有磁性材料的间隔开的柱和在柱之间的非磁性沟槽的类型的垂直磁记录介质是通过允许使用预蚀刻的衬底的方法制成的。 衬底在沟槽处具有大致平坦的表面，并且包括当加热时将扩散到磁记录层材料中并与通常用于记录层中的一种或多种元素发生化学反应的材料。 支柱由不会扩散到记录层中的材料形成。 在整个基板上形成记录层以覆盖柱端和沟槽两者之后，将基板退火。 这导致在沟槽中的记录层材料中的任何铁磁体的破坏或至少显着减少，使得沟槽是非磁性的。 退火不会影响支柱端部的记录层，因为支柱由不会扩散到记录层中的材料形成。

公开(公告)号：US07982996B2

公开(公告)日：2011-07-19

申请号：US12632787

申请日：2009-12-07

申请人： Neil Smith ,  Petrus Antonius VanDerHeijden

发明人： Neil Smith ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B5/02

CPC分类号： G11B5/3133 ,  G11B5/1278 ,  G11B2005/001 ,  G11B2005/0024

摘要： A microwave-assisted magnetic recording (MAMR) write head and system has a spin-torque oscillator (STO) located between the write pole of the write head and a trailing shield that alters the write field from the write pole. The STO is a stack of layers whose planes lie generally parallel to the X-Y plane of an X-Y-Z coordinate system, the stack including a ferromagnetic polarizer layer, a free ferromagnetic layer, and a nonmagnetic electrically conductive spacer between the polarizer layer and the free layer. In the presence of the write field from the write pole the polarizer layer has its magnetization oriented at an angle between 20 and 80 degrees, preferably between 30 and 70 degrees, with the Z-axis. In the presence of a direct electrical current through the STO stack, the free layer magnetization rotates or precesses about the Z-axis with a non-zero angle to the Z-axis.

摘要翻译： 微波辅助磁记录（MAMR）写头和系统具有位于写头的写极之间的自旋扭矩振荡器（STO）和从写极改变写入场的后屏蔽。 STO是其平面大致平行于X-Y-Z坐标系的X-Y平面的一叠层，该堆叠包括在偏振层和自由层之间的铁磁偏振器层，自由铁磁层和非磁性导电间隔物。 在写磁极存在写入场的情况下，偏振器层的磁化方向与Z轴成20度到80度之间，优选地在30度和70度之间的角度。 在存在通过STO堆叠的直接电流的情况下，自由层磁化围绕Z轴以与Z轴成非零角度的方式旋转或进动。

公开(公告)号：US07732071B2

公开(公告)日：2010-06-08

申请号：US11558846

申请日：2006-11-10

申请人： Eric Edward Fullerton ,  Olav Hellwig ,  Jeffrey S. Lille ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden ,  Henry Hung Yang

发明人： Eric Edward Fullerton ,  Olav Hellwig ,  Jeffrey S. Lille ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden ,  Henry Hung Yang

IPC分类号： G11B5/66

CPC分类号： G11B5/855 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325

摘要： A patterned perpendicular magnetic recording medium of the type that has spaced-apart pillars with magnetic material on their ends and with nonmagnetic trenches between the pillars is made with a method that allows use of a pre-etched substrate. The substrate has a generally planar surface at the trenches and comprises material that when heated will diffuse into the magnetic recording layer material and chemically react with one or more of the elements typically used in the recording layer. The pillars are formed of material that will not diffuse into the recording layer. After the recording layer is formed over the entire substrate so as to cover both the pillar ends and the trenches, the substrate is annealed. This results in the destruction or at least substantial reduction of any ferromagnetism in the recording layer material in the trenches so that the trenches are nonmagnetic. The annealing does not affect the recording layer on the ends of the pillars because the pillars are formed of material that will not diffuse into the recording layer.

摘要翻译： 具有在其端部上具有磁性材料的间隔开的柱和在柱之间的非磁性沟槽的类型的垂直磁记录介质是通过允许使用预蚀刻的衬底的方法制成的。 衬底在沟槽处具有大致平坦的表面，并且包括当加热时将扩散到磁记录层材料中并与通常用于记录层中的一种或多种元素发生化学反应的材料。 支柱由不会扩散到记录层中的材料形成。 在整个基板上形成记录层以覆盖柱端和沟槽两者之后，将基板退火。 这导致在沟槽中的记录层材料中的任何铁磁体的破坏或至少显着减少，使得沟槽是非磁性的。 退火不会影响支柱端部的记录层，因为支柱由不会扩散到记录层中的材料形成。

公开(公告)号：US07558019B2

公开(公告)日：2009-07-07

申请号：US11560761

申请日：2006-11-16

申请人： Quang Le ,  James L. Nix ,  Neil Leslie Robertson ,  Neil Smith ,  Petrus Antonius VanDerHeijden

发明人： Quang Le ,  James L. Nix ,  Neil Leslie Robertson ,  Neil Smith ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B5/10 ,  G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/11 ,  G11B5/3116 ,  G11B5/3146 ,  G11B5/315

摘要： A perpendicular magnetic recording write head has a flux conductor in contact with the write pole. The flux conductor is substantially wider than the write pole tip in the cross-track direction and has a blunt end that is recessed from the pole tip end. The region of the flux conductor where its blunt end is in contact with the pole tip is the “choke” point for the write pole, i.e., the point where the flux density is highest. The flux conductor enables the write pole to be made with no flare, or with a flare angle and throat height with a much wider tolerance, which substantially simplifies the manufacturing process. The write head may have a trailing shield and side shields that substantially surround the write pole tip and remove stray fields that may be produced by the flux conductor, so that regions of the recording layer other than the track being written are not adversely affected.

摘要翻译： 垂直磁记录写头具有与写极接触的磁通导体。 磁通导体在横向磁道方向上基本上比写入磁极尖端更宽，并且具有从磁极末端凹进的钝端。 其钝端与极尖接触的磁通导体的区域是写极的“扼流”点，即磁通密度最高的点。 磁通导体使写磁极能够制成没有耀斑，或具有更宽公差的喇叭角和喉部高度，这大大简化了制造过程。 写头可以具有基本上围绕写磁极尖端的后屏蔽和侧屏蔽，并且去除可能由磁通导体产生的杂散场，使得除了正在写入的磁道之外的记录层的区域不受不利影响。