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：US07180710B2

公开(公告)日：2007-02-20

申请号：US10853431

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： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656 ,  G11B5/82

摘要： A magnetic recording medium has 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： 磁记录介质具有至少三个磁性层的层叠磁性结构，其中磁性层具有与写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。}

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。}

公开(公告)号：US07572527B2

公开(公告)日：2009-08-11

申请号：US11135703

申请日：2005-05-24

申请人： Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Margulies

发明人： Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Margulies

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656 ,  G11B5/667 ,  G11B5/7325

摘要： A perpendicular magnetic recording disk has an antiferromagnetically-coupled (AFC) recording layer (RL) comprised of lower and upper ferromagnetic layers, each having a hexagonal-close-packed (hcp) crystalline structure and perpendicular magnetic anisotropy, separated by an antiferromagnetically (AF) coupling layer, wherein the lower ferromagnetic layer (LFM) has substantially higher magnetic permeability than the upper ferromagnetic layer (UFM). The AFC RL is located on an actual exchange break layer (EBL) that separates the AFC RL from the disk's soft magnetic underlayer (SUL). The LFM functions as part of an “effective” exchange break layer (EBL) that also includes the actual EBL and the AF-coupling layer, thereby allowing the actual EBL to be made as thin as possible. The hcp LFM promotes the growth of the hcp UFM in the same way the actual EBL does so that its thickness contributes to the thickness necessary to grow the hcp UFM. The effective EBL appears to be magnetically “thin” during the write process and magnetically “thick” during the readback process.

摘要翻译： 垂直磁记录盘具有由下铁磁层和上铁磁层组成的反铁磁耦合（AFC）记录层（RL），每个具有六方密堆积（hcp）晶体结构和垂直磁各向异性，由反铁磁（AF ）耦合层，其中下铁磁层（LFM）具有比上铁磁层（UFM）显着更高的磁导率。 AFC RL位于将AFC RL与磁盘的软磁底层（SUL）分离的实际交换中断层（EBL）上。 LFM作为“有效”交换中断层（EBL）的一部分，该层还包括实际的EBL和AF耦合层，从而使实际的EBL尽可能薄。 hcp LFM以与实际EBL相同的方式促进hcp UFM的增长，使其厚度有助于生长hcp UFM所需的厚度。 在写入过程中，有效的EBL看似磁性很薄，在回读过程中磁性“厚”。

公开(公告)号：US07776388B2

公开(公告)日：2010-08-17

申请号：US11850165

申请日：2007-09-05

申请人： Elizabeth Dobisz ,  David Margulies ,  Olav Hellwig ,  Xiao Z. Wu

发明人： Elizabeth Dobisz ,  David Margulies ,  Olav Hellwig ,  Xiao Z. Wu

IPC分类号： B05D5/12 ,  C23F1/02

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/855

摘要： Patterned media and associated methods of fabrication are provided in which vertical magnetic grains are grown on a patterned seed layer. The patterned seed layer includes a matrix of islands of a first seed material. Each island of first seed material is separated from other islands by a region of second seed material. The first seed material is selected to initiate growth of magnetic material, and the second seed material is selected to initiate growth of non-magnetic material. Subsequently, magnetic material is grown on the first seed material and non-magnetic material is grown on the second seed material. Deposition may be simultaneously. The magnetic and non-magnetic materials form well-defined vertical columns over the first and second seed materials respectively. Thus, each island behaves as an isolated magnetic unit, which switches independently from its neighbor units, which are magnetically separated by the non-magnetic material.

摘要翻译： 提供了图案化的介质和相关联的制造方法，其中在图案种子层上生长垂直磁性颗粒。 图案化种子层包括第一种子材料的岛的基质。 第一种子材料的每个岛通过第二种子材料的区域与其他岛屿分离。 选择第一种子材料以引发磁性材料的生长，并且选择第二种子材料以引发非磁性材料的生长。 随后，在第一种子材料上生长磁性材料，并且在第二种子材料上生长非磁性材料。 沉积可能同时进行。 磁性和非磁性材料分别在第一种子材料和第二种子材料上形成明确的垂直柱。 因此，每个岛作为孤立的磁性单元，其独立地从其相邻单元切换，其被非磁性材料磁分离。

公开(公告)号：US20070243418A1

公开(公告)日：2007-10-18

申请号：US11403468

申请日：2006-04-12

申请人： Eric Fullerton ,  David Margulies ,  Hal Rosen ,  Natacha Supper

发明人： Eric Fullerton ,  David Margulies ,  Hal Rosen ,  Natacha 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由非磁性间隔层（SL）分离并磁解除的两个记录层（RL 1和RL 2）。 SL具有厚度和组成，以确保在RL 1和RL 2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，RL 1和RL 2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，并且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：US07125616B2

公开(公告)日：2006-10-24

申请号：US10788687

申请日：2004-02-26

申请人： Hoa Van Do ,  Eric Edward Fullerton ,  David Margulies ,  Andreas Moser

发明人： Hoa Van Do ,  Eric Edward Fullerton ,  David Margulies ,  Andreas Moser

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/656

摘要： A magnetic recording disk has an antiferromagnetically-coupled (AFC) structure that has three lower ferromagnetic layers (LL1, LL2, LL3) and an upper ferromagnetic layer (UL), all four ferromagnetic layers being antiferromagnetically-coupled together across corresponding antiferromagnetically-coupling layers. The UL has a magnetization-remanence-thickness product (Mrt) greater than the Mrt each of the three lower layers LL1, LL2, LL3, and greater than the sum of the Mrt values of LL1 and LL3. The middle lower layer LL2 has an Mrt less than the Mrt of each of the other lower layers LL1 and LL3, and as a result the composite Mrt of the AFC structure is less than the composite Mrt of a conventional AFC structure having only a single lower layer. The AFC structure achieves this composite Mrt reduction without increasing the Mrt of any of the three lower layers above the maximum Mrt of the single lower layer in the conventional AFC structure.

摘要翻译： 磁记录盘具有反铁磁耦合（AFC）结构，其具有三个低铁磁层（LL 1，LL 2，LL 3）和上铁磁层（UL），所有四个铁磁层在相应的反铁磁层上反铁磁耦合在一起 - 耦合层。 UL具有大于三个下层LL 1，LL 2，LL 3中的每一个的Mrt的磁化剩磁厚度乘积（Mrt），并且大于LL 1和LL 3的Mrt值之和。 中下层LL 2的Mrt小于其他下层LL 1和LL 3中的每一个的Mrt，结果，AFC结构的复合Mrt小于仅具有传统AFC结构的复合材料Mrt 单个下层。 AFC结构在不增加传统AFC结构中单个下层的最大Mrt以上的三个下层中的任何一个的Mrt的情况下实现了该复合Mrt的还原。

公开(公告)号：US20050013034A1

公开(公告)日：2005-01-20

申请号：US10620664

申请日：2003-07-15

申请人： David Margulies ,  Andreas Moser ,  Hal Rosen ,  Jan-Ulrich ThieIe

发明人： David Margulies ,  Andreas Moser ,  Hal Rosen ,  Jan-Ulrich ThieIe

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/127 ,  G11B5/39 ,  G11B5/66 ,  G11B5/82

CPC分类号： G11B5/012 ,  G11B5/127 ,  G11B5/3903 ,  G11B5/3967 ,  G11B5/66 ,  G11B5/82 ,  G11B2005/001 ,  G11B2005/0021

摘要： A magnetic recording disk drive has an inductive write head and a heater to record data in laminated media on the recording disk. The laminated media, with at least two ferromagnetic layers separated by a nonmagnetic spacer layer, improves SNR. Each of the ferromagnetic layers can be formed of a material having an intrinsic coercivity capable of being written by a conventional inductive write head, but because of the desired lamination to increase SNR, the ferromagnetic layer farthest from the write head is exposed to a magnetic field less than its intrinsic coercivity and thus can not be written. To write to the laminated media, heat is directed to the lower ferromagnetic layer to reduce its intrinsic coercivity below the magnetic field to which it is exposed.

摘要翻译： 磁记录磁盘驱动器具有感应写头和加热器，用于在记录盘上的叠层介质中记录数据。 具有由非磁性间隔层隔开的至少两个铁磁层的层压介质提高了SNR。 每个铁磁层可以由具有能够由常规感应写头写入的固有矫顽力的材料形成，但是由于期望的叠层以增加SNR，所以从写头最远的铁磁层暴露于磁场 小于其内在矫顽力，因此不能写出。 为了写入层压介质，将热量导向下铁磁层，以将它的固有矫顽力降低到暴露于其下的磁场。

公开(公告)号：US20100273028A1

公开(公告)日：2010-10-28

申请号：US12827080

申请日：2010-06-30

申请人： Elizabeth Dobisz ,  David Margulies ,  Olav Hellwig ,  Xiao Z. Wu

发明人： Elizabeth Dobisz ,  David Margulies ,  Olav Hellwig ,  Xiao Z. Wu

IPC分类号： G11B5/84 ,  G11B5/855 ,  G11B5/62

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/855

摘要： Patterned media and associated methods of fabrication are provided in which vertical magnetic grains are grown on a patterned seed layer. The patterned seed layer includes a matrix of islands of a first seed material. Each island of first seed material is separated from other islands by a region of second seed material. The first seed material is selected to initiate growth of magnetic material, and the second seed material is selected to initiate growth of non-magnetic material. Subsequently, magnetic material is grown on the first seed material and non-magnetic material is grown on the second seed material. Deposition may be simultaneously. The magnetic and non-magnetic materials form well-defined vertical columns over the first and second seed materials respectively. Thus, each island behaves as an isolated magnetic unit, which switches independently from its neighbor units, which are magnetically separated by the non-magnetic material.

摘要翻译： 提供了图案化的介质和相关联的制造方法，其中在图案种子层上生长垂直磁性颗粒。 图案化种子层包括第一种子材料的岛的基质。 第一种子材料的每个岛通过第二种子材料的区域与其他岛屿分离。 选择第一种子材料以引发磁性材料的生长，并且选择第二种子材料以引发非磁性材料的生长。 随后，在第一种子材料上生长磁性材料，并且在第二种子材料上生长非磁性材料。 沉积可能同时进行。 磁性和非磁性材料分别在第一种子材料和第二种子材料上形成明确的垂直柱。 因此，每个岛作为孤立的磁性单元，其独立地从其相邻单元切换，其被非磁性材料磁分离。

公开(公告)号：US20070292721A1

公开(公告)日：2007-12-20

申请号：US11789891

申请日：2007-04-25

申请人： Andreas Berger ,  Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Eric Fullerton ,  Bernd Heinz ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Minardi ,  Mohammad Mirzamaani ,  Hal Rosen ,  Natacha Supper ,  Kentaro Takano ,  Min Xiao

发明人： Andreas Berger ,  Xiaoping Bian ,  Qing Dai ,  Hoa Do ,  Eric Fullerton ,  Bernd Heinz ,  Yoshihiro Ikeda ,  David Margulies ,  Mary Minardi ,  Mohammad Mirzamaani ,  Hal Rosen ,  Natacha Supper ,  Kentaro Takano ,  Min Xiao

IPC分类号： G11B5/66 ,  G11B5/706

CPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/7325 ,  G11B5/851

摘要： A perpendicular magnetic recording medium including improvements to the recording layer (RL), exchange break layer (EBL), soft underlayer (SUL), overcoat (OC), adhesion layer (AL) and the combination of the layers. Advances in the RL include a cap layer. Improvements in the EBL include a multiple layer EBL.

摘要翻译： 包括对记录层（RL），交换破坏层（EBL），软底层（SUL），外涂层（OC），粘合层（AL）以及这些层的组合的改进的垂直磁记录介质。 RL的进步包括盖层。 EBL的改进包括多层EBL。