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：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：US20120250178A1

公开(公告)日：2012-10-04

申请号：US13077797

申请日：2011-03-31

申请人： Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

发明人： Toshiki Hirano ,  Fu-Ying Huang ,  Jia-Yang Juang ,  Hal J. Rosen ,  Barry C. Stipe

IPC分类号： G11B5/02 ,  G11B5/673 ,  G11B5/66

CPC分类号： G11B5/66 ,  G11B5/7325 ,  G11B5/82

摘要： A magnetic media for heat assisted magnetic data recording. The magnetic media includes a thermal insulation layer structure formed near the substrate of the media provide more efficient heating of the write layer by allowing less heat dissipation to the substrate. The thermal insulation layer structure can be one or more layers of an oxide such as SiO2 and one or more layers of a material such as NiTa. Increasing the number of oxide layers and NiTa layers increases the thermal insulation of the thermal insulation layer structure thereby further increasing the efficiency of the heat assisted writing.

摘要翻译： 用于热辅助磁数据记录的磁介质。 磁介质包括在介质的衬底附近形成的绝热层结构，通过允许对衬底的较少散热来提供写入层的更有效的加热。 绝热层结构可以是一层或多层氧化物如SiO 2和一层或多层诸如NiTa的材料。 增加氧化物层和NiTa层的数量增加了绝热层结构的热绝缘性，从而进一步提高了热辅助写入的效率。

公开(公告)号：US08208228B2

公开(公告)日：2012-06-26

申请号：US12565721

申请日：2009-09-23

申请人： Stefan Maat ,  James Terrence Olson ,  Hal J. Rosen

发明人： Stefan Maat ,  James Terrence Olson ,  Hal J. Rosen

IPC分类号： G11B5/39 ,  G11B5/11 ,  G11B5/265

CPC分类号： G11B5/746 ,  B82Y10/00 ,  G11B5/02 ,  G11B5/3948 ,  G11B5/3977 ,  G11B5/4886 ,  G11B5/743 ,  G11B2005/0005

摘要： A magnetoresistive (MR) sensor or read head for a magnetic recording disk drive has multiple independent current-perpendicular-to-the-plane (CPP) MR sensing elements. The sensing elements are spaced-apart in the cross-track direction and separated by an insulating separation region so as to be capable of reading data from multiple data tracks on the disk. The sensing elements have independent CPP sense currents, each of which is directed to independent data detection electronics, respectively. Each sensing element comprises a stack of layers formed on a common electrically conducting base layer, which may be a bottom magnetic shield layer formed of electrically conducting magnetically permeable material. Each sensing element has a top electrical lead layer. A top magnetic shield layer is located above the sensing elements in contact with the top lead layers. The top shield layer is formed of soft magnetically permeable material, but is electrically insulating, so that the independent sense currents can be passed to the independent sensing elements.

摘要翻译： 用于磁记录磁盘驱动器的磁阻（MR）传感器或读头具有多个独立的电流垂直于平面（CPP）MR感测元件。 感测元件在交叉轨道方向上间隔开并且被绝缘分离区分开，以便能够从盘上的多个数据轨道读取数据。 感测元件具有独立的CPP感测电流，每个电流分别被引导到独立的数据检测电子器件。 每个感测元件包括形成在公共导电基底层上的一叠层，其可以是由导电的导磁材料形成的底部磁屏蔽层。 每个感测元件具有顶部电引线层。 顶部磁屏蔽层位于与顶部引线层接触的感测元件上方。 顶部屏蔽层由软磁导电材料形成，但是是电绝缘的，使得独立的感测电流可以传递到独立的感测元件。

公开(公告)号：US07986491B2

公开(公告)日：2011-07-26

申请号：US12248117

申请日：2008-10-09

申请人： Thomas R Albrecht ,  Hal J. Rosen

发明人： Thomas R Albrecht ,  Hal J. Rosen

IPC分类号： G11B17/08

CPC分类号： G11B17/26 ,  G11B17/021

摘要： A hard disk drive (HDD) has a stack of disks mounted on a rotatable spindle with the disks being movable axially, i.e., in a direction parallel to the axis of rotation of the spindle. A disk separator is located inside the spindle and separates axially-adjacent disks in a pair to create an axial gap. Any pair of axially-adjacent disks can be separated so that different axial gaps are created. A single head-arm assembly with at least one and preferably two read write heads is movable axially so that it can be rotated by the rotary actuator into any one of the axial gaps. The read/write heads can thus access data on the disk surfaces in the axial gaps. When it is desired to have the disk separator create an new axial gap and thus a new pair of disk surfaces to be accessed, the actuator rotates the head-arm assembly away from the outer perimeters of the disks and moves the read/write heads onto a head support structure that supports the read/write heads off the disks.

摘要翻译： 硬盘驱动器（HDD）具有安装在可旋转主轴上的盘堆，盘可以轴向移动，即在与主轴的旋转轴线平行的方向上移动。 磁盘分离器位于主轴内部并且分离成一对轴向相邻的磁盘以产生轴向间隙。 可以分离任何一对轴向相邻的盘，使得产生不同的轴向间隙。 具有至少一个并且优选两个读写头的单个头臂组件可轴向移动，使得其可以由旋转致动器旋转到任何一个轴向间隙中。 因此，读/写头可以在轴向间隙中访问磁盘表面上的数据。 当希望磁盘分离器产生新的轴向间隙并且因此产生一对新的待访问的盘表面时，致动器将头臂组件旋转远离盘的外周，并将读/写头移动到 一个头部支持结构，支持磁盘上的读/写磁头。

公开(公告)号：US20100002487A1

公开(公告)日：2010-01-07

申请号：US12553670

申请日：2009-09-03

申请人： Robert E. Fontana, JR. ,  Andreas Moser ,  Hal J. Rosen ,  Bruce D. Terris ,  Ching Hwa Tsang

发明人： Robert E. Fontana, JR. ,  Andreas Moser ,  Hal J. Rosen ,  Bruce D. Terris ,  Ching Hwa Tsang

IPC分类号： G11C11/00 ,  G11C11/15 ,  G11C11/416

CPC分类号： G11C11/14 ,  G11C5/02 ,  G11C19/0808

摘要： Magnetic memories and methods are disclosed. A magnetic memory as described herein includes a plurality of stacked data storage layers to form a three-dimensional magnetic memory. Bits may be written to a data storage layer in the form of magnetic domains. The bits can then be transferred between the stacked data storage layers by heating a neighboring data storage layer, which allows the magnetic fields from the magnetic domains to imprint the magnetic domains in the neighboring data storage layer. By imprinting the magnetic domains into the neighboring data storage layer, the bits are copied from one data storage layer to another.

摘要翻译： 公开了磁存储器和方法。 如本文所述的磁存储器包括多个堆叠的数据存储层以形成三维磁存储器。 位可以以磁畴的形式写入数据存储层。 然后可以通过加热相邻数据存储层在堆叠的数据存储层之间传送这些位，这允许来自磁畴的磁场将磁畴压印在相邻的数据存储层中。 通过将磁畴印刷到相邻数据存储层中，将这些位从一个数据存储层复制到另一个。

公开(公告)号：US07488545B2

公开(公告)日：2009-02-10

申请号：US11403468

申请日：2006-04-12

申请人： Eric E. Fullerton ,  David Margulies ,  Hal J. Rosen ,  Natacha F. Supper

发明人： Eric E. Fullerton ,  David Margulies ,  Hal J. Rosen ,  Natacha F. Supper

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/65

摘要： A laminated perpendicular magnetic recording medium has two recording layers (RL1 and RL2) that are separated and magnetically decoupled by a nonmagnetic spacer layer (SL). The SL has a thickness and composition to assure there is no antiferromagnetic or ferromagnetic coupling between RL1 and RL2. Thus in the presence of the write field, RL1 and RL2 respond independently and become oriented with the direction of the write field. Each RL is an “exchange-spring” type magnetic recording layer formed of two ferromagnetic layers (MAG1 and MAG2) that have substantially perpendicular magnetic anisotropy and are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer (CL). The medium takes advantage of lamination to attain higher signal-to-noise ratio (SNR) yet has improved writability as a result of each RL being an exchange-spring type RL.

摘要翻译： 层叠的垂直磁记录介质具有被非磁性间隔层（SL）分离并磁解除的两个记录层（RL1和RL2）。 SL具有厚度和组成，以确保在RL1和RL2之间不存在反铁磁或铁磁耦合。 因此，在存在写入场的情况下，RL1和RL2独立地响应并且随着写入场的方向而取向。 每个RL是由两个铁磁层（MAG1和MAG2）形成的“交换弹簧”型磁记录层，它们具有基本上垂直的磁各向异性，并通过非磁性或弱铁磁耦合层（CL）进行铁磁交换耦合。 介质利用层叠来获得更高的信噪比（SNR），而由于每个RL是交换弹簧型RL，所以具有改进的可写性。

公开(公告)号：US07177118B2

公开(公告)日：2007-02-13

申请号：US10853631

申请日：2004-05-24

申请人： Hoa Van Do ,  David Margulies ,  Hal J. Rosen ,  Natacha F. Supper

发明人： Hoa Van Do ,  David Margulies ,  Hal J. Rosen ,  Natacha F. Supper

IPC分类号： G11B5/012 ,  G11B5/62

CPC分类号： G11B5/66

摘要： A magnetic recording system uses a magnetic recording medium having a laminated magnetic structure with at least three magnetic layers, wherein the magnetic layers have decreasing intrinsic coercivity H0 with distance from the write head. The write field at the center of each magnetic layer is greater than that layer's H0. The magnetic layers have different compositions and/or thicknesses and thereby different values of H0. The alloys used in the middle and upper magnetic layers are relatively “high-moment” alloys that would not ordinarily be used in magnetic recording media because they have relatively low S0NR, but the overall S0NR of the laminated magnetic structure is improved because of the effect of lamination. The middle and upper magnetic layers can be made substantially thinner, which enables the magnetic layers to be located closer to the write head, thereby exposing each of the magnetic layers to a higher write field.

摘要翻译： 磁记录系统使用具有至少三个磁性层的层叠磁性结构的磁记录介质，其中磁层具有与写入头距离更小的固有矫顽力H 0 0。 每个磁性层的中心处的写入场大于该层的H 0 0。 磁性层具有不同的组成和/或厚度，从而具有不同的H 0 O值。 在中上层磁性层中使用的合金是相对“高力矩”的合金，它们通常不会用于磁记录介质，因为它们具有相对较低的S O N，但总体上S _{0得到改善。 可以使中上层磁性层和上磁性层实质上更薄，这使得磁层能够更靠近写入头位置，从而将每个磁性层暴露于较高的写入场。}