公开(公告)号：US07894159B2

公开(公告)日：2011-02-22

申请号：US11737707

申请日：2007-04-19

申请人： Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Thomas Dudley Boone, Jr. ,  Petrus Antonius Van Der Heijden

发明人： Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Thomas Dudley Boone, Jr. ,  Petrus Antonius Van Der Heijden

IPC分类号： G11B5/127

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

摘要： A magnetic write head having independent trailing and side magnetic shields. The side shields and trailing shields are independently of one another so that they can have throat heights that are different from one another. This advantageously allows the magnetic potential between the write pole and side shields to be controlled independently of one another without relying on the side gap and trailing gap thicknesses. Furthermore, magnetic performance of the write head can be improved because the side shields can be constructed with varying tapered throat heights, while the throat height of the trailing shield can remain constant.

摘要翻译： 具有独立尾部和侧面磁屏蔽的磁性写入头。 侧护罩和后挡板彼此独立，使得它们可以具有彼此不同的喉部高度。 这有利地允许写磁极和侧屏蔽之间的磁电势彼此独立地控制，而不依赖于侧间隙和后隙间隙。 此外，可以改善写头的磁性能，因为侧屏可以构造成具有变化的锥形喉部高度，而后屏蔽的喉部高度可以保持恒定。

公开(公告)号：US20090155627A1

公开(公告)日：2009-06-18

申请号：US11956389

申请日：2007-12-14

申请人： Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

发明人： Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

IPC分类号： G11B5/62 ,  G11B5/84

CPC分类号： G11B5/66

摘要： A media architecture is optimized for discrete track recording. A capped or exchange-spring media uses a thin media structure and incorporates higher moment density magnetic layers. A thin exchange coupling layer is used in conjunction with a cap layer to control the reversal mechanism and exchange. Thus, the exchange coupling layer mediates the interaction between the two outer magnetic layers. The thickness of the exchange coupling layer is tuned by monitoring the media signal-to-noise ratio, track width and bit error rate. The recording performance is enhanced by tuning the intergranular exchange in the system through the use of the high-moment cap as writeability, resolution and noise are improved.

摘要翻译： 媒体架构针对离散轨道记录进行了优化。 封盖或交换弹簧介质使用薄介质结构并且结合较高的力矩密度磁层。 薄交换耦合层与盖层结合使用以控制反转机制和交换。 因此，交换耦合层介导两个外磁层之间的相互作用。 通过监测介质信噪比，轨道宽度和误码率来调整交换耦合层的厚度。 通过使用高功率上限作为可写性来调整系统中的晶间交换，提高了记录性能，提高了分辨率和噪声。

公开(公告)号：US07532432B2

公开(公告)日：2009-05-12

申请号：US11379858

申请日：2006-04-24

申请人： Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden

发明人： Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Petrus Antonius VanDerHeijden

IPC分类号： G11B5/127 ,  G11B5/23

CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/667

摘要： A perpendicular magnetic recording data storage system combines a perpendicular medium that has a thin low-magnetic-permeability or “soft” underlayer (SUL) with a recording head that has a trailing shield (TS) with a thick throat height, i.e., a thickness in a direction orthogonal to the recording layer of the medium. The SUL is thin enough and has a low enough magnetic permeability to become saturated in a region beneath the trailing gap of the head during writing, but the throat height of the TS is thick enough to prevent the TS from becoming magnetically saturated during writing. The magnetic saturation of the SUL during writing changes the magnetic reluctance such that more of the magnetic flux going through the SUL changes direction (“field undershoot”) and goes to the TS. If the permeability of the SUL is so low (e.g., close to unity) that the SUL does not magnetically saturate, field undershoot may still occur because the reluctance from the SUL to the TS is still smaller than the reluctance from the SUL to the return pole (RP). Field undershoot enables a high write field gradient, which results in narrower magnetic transitions.

摘要翻译： 垂直磁记录数据存储系统将具有薄的低磁导率或“软”底层（SUL）的垂直介质与具有厚的喉部高度的后挡板（TS）的记录头组合，即厚度 在与介质的记录层正交的方向上。 SUL足够薄并且在写入期间具有足够低的磁导率以在头部的拖尾间隙下方的区域饱和，但是TS的喉部高度足够厚以防止TS在写入期间变得磁饱和。 在写入期间SUL的磁饱和度改变磁阻，使得穿过SUL的更多的磁通量改变方向（“场下冲”）并且进入TS。 如果SUL的磁导率如此低（例如，接近于1），SUL不会磁饱和，则由于从SUL到TS的磁阻仍然小于从SUL到返回的磁阻，所以仍然可能发生场下冲 杆（RP）。 场下冲可实现高写磁场梯度，从而导致较小的磁转变。

公开(公告)号：US20080259498A1

公开(公告)日：2008-10-23

申请号：US11737707

申请日：2007-04-19

申请人： Byron Hassberg Lengsfield ,  James Terrence Olson ,  Thomas Dudley Boone ,  Petrus Antonius Van Der Heijden

发明人： Byron Hassberg Lengsfield ,  James Terrence Olson ,  Thomas Dudley Boone ,  Petrus Antonius Van Der Heijden

IPC分类号： G11B5/127 ,  G11B17/32 ,  G11B5/147

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

摘要： A magnetic write head having independent trailing and side magnetic shields. The side shields and trailing shields are independently of one another so that they can have throat heights that are different from one another. This advantageously allows the magnetic potential between the write pole and side shields to be controlled independently of one another without relying on the side gap and trailing gap thicknesses. Furthermore, magnetic performance of the write head can be improved because the side shields can be constructed with varying tapered throat heights, while the throat height of the trailing shield can remain constant.

摘要翻译： 具有独立尾部和侧面磁屏蔽的磁性写入头。 侧护罩和后挡板彼此独立，使得它们可以具有彼此不同的喉部高度。 这有利地允许写磁极和侧屏蔽之间的磁电势彼此独立地控制，而不依赖于侧间隙和拖尾间隙厚度。 此外，可以改善写头的磁性能，因为侧屏可以构造成具有变化的锥形喉部高度，而后屏蔽的喉部高度可以保持恒定。

公开(公告)号：US20080112080A1

公开(公告)日：2008-05-15

申请号：US11598419

申请日：2006-11-13

申请人： Byron Hassberg Lengsfield ,  Ian Robson McFadyen ,  James L. Nix ,  James Terrence Olson ,  Petrus Antonius Van Der Heijden ,  Bruce Wilson

发明人： Byron Hassberg Lengsfield ,  Ian Robson McFadyen ,  James L. Nix ,  James Terrence Olson ,  Petrus Antonius Van Der Heijden ,  Bruce Wilson

IPC分类号： G11B5/127

CPC分类号： G11B5/3123 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/3143

摘要： A write head for perpendicular magnetic recording having a write pole and first and second return poles. The write head can include a first magnetomotive force source for delivering a magnetomotive force to the first return pole and the write pole and a second magnetomotive force source for delivering magnetomotive force to the second return pole and the write pole. The first and second magnetomotive force sources can be operated independently of one another so that different relative amounts of magnetomotive force can be applied to the first and second return poles. A trailing magnetic shield can be connected with one of the return poles, such as the second return poles, and the variation in magnetomotive force can be used to increase the amount of flux flowing through the trailing shield when increased field gradient is desired (such as when writing a transition), and to decrease the amount of flux through the trailing shield when decreased field gradient and increased write field are desired (such as when writing a long magnetic section on a magnetic medium).

摘要翻译： 用于垂直磁记录的写头，具有写极和第一和第二返回极。 写头可以包括用于将磁动势传递到第一返回极和写极的第一磁动势源和用于将磁动势传递到第二返回极和写极的第二磁动势力源。 第一和第二磁动势源可以彼此独立地操作，使得可以将不同的相对量的磁动势施加到第一和第二返回极。 拖尾磁屏蔽可以与诸如第二返回极中的一个返回极连接，并且当需要增加磁场梯度时，可以使用磁动势的变化来增加流过后屏蔽的磁通量（例如 当写入转换时），并且当需要减小的场梯度和增加的写入场（例如当在磁介质上写入长磁场时）时，减小通过后屏蔽的通量的量。

公开(公告)号：US20110069413A1

公开(公告)日：2011-03-24

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： G11B5/33 ,  G11B5/60

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：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：US20080316630A1

公开(公告)日：2008-12-25

申请号：US11765650

申请日：2007-06-20

申请人： Bernd Lamberts ,  Vladimir Nikitin ,  James Terrence Olson

发明人： Bernd Lamberts ,  Vladimir Nikitin ,  James Terrence Olson

IPC分类号： G11B27/36 ,  G11B5/17 ,  G11B5/33

CPC分类号： G11B5/1278 ,  G11B5/3133 ,  G11B5/6064 ,  G11B5/607

摘要： A magnetic data recording system that can directly measure soft underlayer spacing of a perpendicular magnetic write head during operation. The soft underlayer spacing of the magnetic write head can be determined by measuring the magnetic inductance of the write head. The inductance of the write head varies with changes in the distance between the write pole and the soft underlayer of the magnetic medium. By connecting the write head with magnetic inductance measuring circuitry, the soft underlayer spacing can be constantly monitored during operation of the magnetic data recording system. The system can also include active fly height control such as a thermal fly height control capability. By directly measuring the soft underlayer spacing in real time during use of the data recording system, the actively fly height controlling features can be operated efficiently to precisely maintain a desired spacing between the write pole and the soft underlayer of the magnetic medium.

摘要翻译： 一种磁性数据记录系统，可在操作过程中直接测量垂直磁性写入头的软底层间距。 可以通过测量写头的磁感来确定磁写头的软底层间距。 写头的电感随磁介质的写极和软底层之间的距离变化而变化。 通过将写入头与磁感测量电路连接起来，可以在磁数据记录系统的操作期间不间断地监视软底层间距。 该系统还可以包括主动飞行高度控制，例如热飞行高度控制能力。 通过在使用数据记录系统期间实时地直接测量软底层间距，可以有效地操作主动飞行高度控制特征，以精确地保持磁性介质的写极和软底层之间的期望间隔。

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：US07791839B2

公开(公告)日：2010-09-07

申请号：US11532084

申请日：2006-09-14

申请人： James Terrence Olson ,  Barry Cushing Stipe ,  Timothy Carl Strand

发明人： James Terrence Olson ,  Barry Cushing Stipe ,  Timothy Carl Strand

IPC分类号： G11B5/60 ,  G11B5/127

CPC分类号： G11B5/314 ,  G11B5/02 ,  G11B5/3116 ,  G11B5/3123 ,  G11B2005/0002 ,  G11B2005/0021

摘要： A thermally-assisted perpendicular magnetic recording head and system has a head carrier that supports an optical channel for the transmission of radiation to the recording layer, a write pole for directing a magnetic field to the recording layer, and an electrical coil for inducing the magnetic field from the write pole. The optical channel has a radiation exit face with an aperture at the recording-layer-facing surface of the head carrier. The write pole has a pole tip with an end face that is recessed from the recording-layer-facing surface. The write pole tip is tapered down to the end faces. The pole tip taper and the recession of the end face concentrates the write field at the middle of the perpendicular magnetic recording layer where the radiation from the optical channel is incident. The characteristic dimension of the aperture and the spacing between the aperture and the recording layer are both less than the wavelength of the radiation. The radiation source may be a laser diode mounted to the head carrier.

摘要翻译： 热辅助垂直磁记录头和系统具有头托架，其支撑用于将辐射传输到记录层的光通道，用于将磁场引导到记录层的写磁极和用于引导磁场的电线圈 字段从写柱。 光通道具有在头托架的面向记录层的表面上具有孔的辐射出射面。 写极具有极尖，端面从面向记录层的表面凹入。 写磁极尖端朝向端面逐渐变细。 极尖锥度和端面的凹陷将写入场集中在垂直磁记录层的中心处，其中来自光通道的辐射入射。 孔径的特征尺寸和孔径与记录层之间的间距均小于辐射波长。 辐射源可以是安装到头部托架的激光二极管。