公开(公告)号：US07504166B2

公开(公告)日：2009-03-17

申请号：US10856209

申请日：2004-05-27

申请人： Charles Changqing Chen ,  Thanh Thien Ha ,  Abebe Hailu ,  Taesun Ernest Kim ,  Mariana Rodica Munteanu ,  Steve Kuo-Hsing Hwang

发明人： Charles Changqing Chen ,  Thanh Thien Ha ,  Abebe Hailu ,  Taesun Ernest Kim ,  Mariana Rodica Munteanu ,  Steve Kuo-Hsing Hwang

IPC分类号： G11B5/66

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66 ,  G11B5/851

摘要： CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtB—X, to enhance the grain segregation. The five element CoCrPtB—X layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtB—X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.

摘要翻译： CoCrPtB是用于在诸如硬盘驱动器的数据存储设备中记录数据的薄膜磁性介质结构的一些层中的常规材料。 通常用于磁性介质的CoCrPtB层在底部磁性层中具有高Cr和低B，在顶部磁性层中具有低Cr和高B。 根据本发明的一个实施例，为了改善介质电性能，向CoCrPtB材料中添加了诸如Ta，Nb和Hf等第五元素，产生CoCrPtB-X，以增强晶粒分离。 使用脉冲直流溅射技术代替传统的直流溅射技术沉积五个元素CoCrPtB-X层。 所得到的具有CoCrPtB-X合金层的磁性介质结构表现出矫顽力Hc的提高和记录性能的提高。

公开(公告)号：US20090211898A1

公开(公告)日：2009-08-27

申请号：US12391938

申请日：2009-02-24

申请人： Charles Changqing Chen ,  Thanh Thien Ha ,  Abebe Hailu ,  Taesun Ernest Kim ,  Mariana Rodica Munteanu ,  Steve Kuo-Hsing Hwang

发明人： Charles Changqing Chen ,  Thanh Thien Ha ,  Abebe Hailu ,  Taesun Ernest Kim ,  Mariana Rodica Munteanu ,  Steve Kuo-Hsing Hwang

IPC分类号： C23C14/34

CPC分类号： G11B5/7325 ,  G11B5/656 ,  G11B5/66 ,  G11B5/851

摘要： CoCrPtB is a conventional material used in some of the layers of a thin film magnetic media structure used for recording data in data storage devices such as hard drives. Typically the CoCrPtB layers used for magnetic media have high Cr and low B in bottom magnetic layers and low Cr and high B in top magnetic layers. In accordance with one embodiment of this invention and to improve media electrical performance, fifth elements, such as Ta, Nb and Hf, etc. were added to the CoCrPtB materials, resulting in CoCrPtB-X, to enhance the grain segregation. The five element CoCrPtB-X layers were deposited using a pulsed direct current sputter technique instead of conventional direct current sputtering techniques. The resulting magnetic media structure having CoCrPtB-X alloy layers exhibits an increase in coercivity Hc and improvement in recording performance.

摘要翻译： CoCrPtB是用于在诸如硬盘驱动器的数据存储设备中记录数据的薄膜磁性介质结构的一些层中的常规材料。 通常用于磁性介质的CoCrPtB层在底部磁性层中具有高Cr和低B，在顶部磁性层中具有低Cr和高B。 根据本发明的一个实施例，为了改善介质电性能，向CoCrPtB材料中添加了诸如Ta，Nb和Hf等第五元素，产生CoCrPtB-X，以增强晶粒分离。 使用脉冲直流溅射技术代替传统的直流溅射技术沉积五个元素CoCrPtB-X层。 所得到的具有CoCrPtB-X合金层的磁性介质结构表现出矫顽力Hc的提高和记录性能的提高。

公开(公告)号：US06878460B1

公开(公告)日：2005-04-12

申请号：US10396365

申请日：2003-03-26

申请人： Abebe Hailu ,  Charles Changqing Chen ,  Taesun Ernest Kim

发明人： Abebe Hailu ,  Charles Changqing Chen ,  Taesun Ernest Kim

IPC分类号： G11B5/64 ,  G11B5/73

CPC分类号： G11B5/732 ,  G11B5/656 ,  G11B5/7325 ,  Y10T428/12986

摘要： A thin film magnetic according medium with enhanced coercivity is provided. The magnetic recording medium comprises a non-magnetic substrate having a surface and a layer stack atop the substrate surface. The layer stack comprises a magnetic recording layer and a dual intermediate layer structure below the magnetic recording layer comprising a base layer and a non-magnetic layer between the base layer and the magnetic recording layer. The non-magnetic layer has a thickness less than that necessary for RKKY coupling between the base layer and the magnetic recording layer, and provides the medium with increased coercivity.

摘要翻译： 提供了具有增强矫顽力的薄膜磁性介质。 磁记录介质包括在基板表面上方具有表面和层叠层的非磁性基板。 层叠体包括磁记录层和位于磁记录层下面的双层中间层结构，包括在基层和磁记录层之间的基层和非磁性层。 非磁性层的厚度小于基底层与磁记录层之间的RKKY耦合所必需的厚度，并为介质提供增加的矫顽力。

公开(公告)号：US08696874B2

公开(公告)日：2014-04-15

申请号：US13367991

申请日：2012-02-07

申请人： Shoutao Wang ,  Weilu Xu ,  Chunghee Chang ,  Xiaoguang Ma ,  Mark Johnson ,  Abebe Hailu ,  Charles Chen

发明人： Shoutao Wang ,  Weilu Xu ,  Chunghee Chang ,  Xiaoguang Ma ,  Mark Johnson ,  Abebe Hailu ,  Charles Chen

IPC分类号： C23C14/34

CPC分类号： G11B5/84 ,  G11B5/732 ,  G11B5/7325 ,  G11B5/738

摘要： An apparatus and method are provided for improving perpendicular magnetic recording media. The present invention provides media, and a method of fabricating media in a cost-effective manner, with a reduced ruthenium (Ru) content interlayer structure, while meeting media performance requirements. A perpendicular magnetic recording medium is provided comprising a non-magnetic substrate having a surface, and a layer stack situated on the substrate surface. The layer stack comprises, in overlying sequence from the substrate surface a magnetically soft underlayer; an amorphous or crystalline, non-magnetic seed layer; an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material situated on the underlayer; and at least one crystallographically oriented, magnetically hard, perpendicular magnetic recording layer situated on the interlayer structure. The interlayer structure is a stacked structure comprising, in overlying sequence: a chromium alloy situated on the seed layer; and an upper interlayer situated on the chromium alloy.

摘要翻译： 提供了用于改进垂直磁记录介质的装置和方法。 本发明在满足介质性能要求的同时，提供了具有降低的钌（Ru）含量层间结构的以成本有效的方式制造介质的介质和方法。 提供了包括具有表面的非磁性基底和位于基底表面上的层叠的垂直磁记录介质。 层叠体以从衬底表面的叠加顺序包括一个软磁软底层; 无定形或结晶的非磁性种子层; 用于晶体取向位于底层上的垂直磁记录材料层的层间结构; 以及位于层间结构上的至少一个晶体取向的磁性硬的垂直磁记录层。 层间结构是层叠结构，其叠加顺序为：位于种子层上的铬合金; 和位于铬合金上的上层。

公开(公告)号：US20080204933A1

公开(公告)日：2008-08-28

申请号：US11709822

申请日：2007-02-23

申请人： Abebe Hailu ,  Weilu Xu ,  Xiaoguang Ma ,  Chung-Hee Chang ,  Shoutao Wang ,  Charles C. Chen

发明人： Abebe Hailu ,  Weilu Xu ,  Xiaoguang Ma ,  Chung-Hee Chang ,  Shoutao Wang ,  Charles C. Chen

IPC分类号： G11B5/82

CPC分类号： G11B5/732 ,  G11B5/65 ,  G11B5/667 ,  G11B5/7325

摘要： A perpendicular magnetic recording medium comprises a layer stack formed over a surface of a non-magnetic substrate, and comprising, in overlying sequence from the surface: a magnetically soft underlayer; an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material formed thereon; and at least one crystallographically oriented, magnetically hard, perpendicular magnetic recording layer on the interlayer structure; wherein the interlayer structure is a triple-layer stacked structure comprising: a first interlayer of a first non-magnetic material proximal the magnetically soft underlayer and containing Ru; a second interlayer of a second non-magnetic material in overlying contact with the first interlayer and not containing Ru; and a third interlayer of a third non-magnetic material in overlying contact with the second interlayer and containing Ru.

摘要翻译： 垂直磁记录介质包括形成在非磁性衬底的表面上的层叠层，并且包括从表面叠加的顺序：软磁性底层; 用于晶体取向形成在其上的垂直磁记录材料层的层间结构; 以及在层间结构上的至少一个晶体取向的磁性硬的垂直磁记录层; 其中所述层间结构是三层堆叠结构，包括：靠近所述磁软底层并包含Ru的第一非磁性材料的第一中间层; 第二非磁性材料的第二中间层与第一中间层重叠接触并且不含Ru; 以及第三非磁性材料的第三中间层，与第二夹层重叠接触并含有Ru。

公开(公告)号：US20100165508A1

公开(公告)日：2010-07-01

申请号：US12347141

申请日：2008-12-31

申请人： Erol Girt ,  Dieter K. Weller ,  Alexander Y. Dobin ,  Bogdan F. Valcu ,  Thomas F. Ambrose ,  Yingguo Peng ,  Yukiko A. Kubota ,  Abebe Hailu

发明人： Erol Girt ,  Dieter K. Weller ,  Alexander Y. Dobin ,  Bogdan F. Valcu ,  Thomas F. Ambrose ,  Yingguo Peng ,  Yukiko A. Kubota ,  Abebe Hailu

IPC分类号： G11B5/82

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

摘要： A perpendicular magnetic recording layer of a magnetic recording medium includes a plurality of bit-patterned magnetic islands, wherein each of the plurality of islands overlay a soft magnetic under-layer. Each of the magnetic islands includes a first magnetic sub-layer adjacent a second magnetic sub-layer, wherein the first sub-layer has a relatively high magnetic anisotropy that is greater than a magnetic anisotropy of the second sub-layer. The magnetic recording layer further includes a third sub-layer, which extends to connect each of the plurality of islands. The third sub-layer may have a magnetic anisotropy that is less than that of the second sub-layer of each of the magnetic islands and/or may serve as an interlayer, extending between the first sub-layer and the soft magnetic under-layer of the recording medium, and having a structure to help to produce the greater anisotropy first magnetic sub-layer.

摘要翻译： 磁记录介质的垂直磁记录层包括多个位图形磁岛，其中多个岛中的每一个覆盖软磁底层。 每个磁岛包括与第二磁性子层相邻的第一磁性子层，其中第一子层具有大于第二子层的磁各向异性的相对高的磁各向异性。 磁记录层还包括延伸以连接多个岛中的每一个的第三子层。 第三子层可以具有小于每个磁岛的第二子层的磁各向异性和/或可以用作在第一子层和软磁性底层之间延伸的中间层 并且具有有助于产生更大的各向异性的第一磁性子层的结构。

公开(公告)号：US07157161B1

公开(公告)日：2007-01-02

申请号：US10854433

申请日：2004-05-27

申请人： Abebe Hailu ,  Charles Changging Chen ,  Mariana R. Munteanu

发明人： Abebe Hailu ,  Charles Changging Chen ,  Mariana R. Munteanu

IPC分类号： G11B5/66 ,  G11B5/70

CPC分类号： G11B5/7325 ,  G11B5/656

摘要： The Hr and SNR of a magnetic recording medium are increased and the signal pulse narrowed by employing a tri-layer underlayer structure containing Cr or a Cr alloy wherein the second underlayer contains Cr and B, the first underlayer preferably contains substantially pure Cr, and the third underlayer preferably contains a ternary alloy of Cr.

摘要翻译： 通过使用含有Cr或Cr合金的三层底层结构，磁记录介质的Hr和SNR增加，信号脉冲变窄，其中第二底层含有Cr和B，第一底层优选含有基本上纯的Cr， 第三底层优选含有Cr的三元合金。

公开(公告)号：US09093101B2

公开(公告)日：2015-07-28

申请号：US13037288

申请日：2011-02-28

申请人： Jai-Young Kim ,  Thomas P. Nolan ,  Kyongha Kang ,  Shoutao Wang ,  Vincent D. Nguyen ,  Abebe Hailu ,  Charles C. Chen

发明人： Jai-Young Kim ,  Thomas P. Nolan ,  Kyongha Kang ,  Shoutao Wang ,  Vincent D. Nguyen ,  Abebe Hailu ,  Charles C. Chen

IPC分类号： G11B5/66 ,  G11B5/82 ,  G11B5/73

CPC分类号： G11B5/82 ,  G11B5/66 ,  G11B5/7325 ,  G11B5/851

摘要： A stack including a crystallographic orientation interlayer, a magnetic zero layer disposed on the interlayer, and a magnetic recording layer disposed on the magnetic zero layer is disclosed. The magnetic zero layer is non-magnetic or has a saturation magnetic flux density (Bs) less than about 100 emu/cc. The magnetic zero layer and the magnetic layer include grains surrounded by a non-magnetic segregant. The magnetic zero layer provides a coherent interface between the interlayer and the magnetic layer with a lattice mismatch less than about 4%.

摘要翻译： 公开了一种包括晶体取向中间层，设置在中间层上的磁性零层和设置在磁性零层上的磁记录层的堆叠。 磁性零层是非磁性的或具有小于约100emu / cc的饱和磁通密度（Bs）。 磁性零层和磁性层包括由非磁性分离器包围的晶粒。 磁性零层在中间层和磁性层之间提供具有小于约4％的晶格失配的相干界面。

公开(公告)号：US08685547B2

公开(公告)日：2014-04-01

申请号：US12389039

申请日：2009-02-19

申请人： Bo Bian ,  Shoutao Wang ,  Weilu Xu ,  Abebe Hailu ,  Miaogen Lu ,  Charles C. Chen ,  Thomas Patrick Nolan ,  Alexander Yulievich Dobin

发明人： Bo Bian ,  Shoutao Wang ,  Weilu Xu ,  Abebe Hailu ,  Miaogen Lu ,  Charles C. Chen ,  Thomas Patrick Nolan ,  Alexander Yulievich Dobin

IPC分类号： G11B5/66

CPC分类号： G11B5/66 ,  G11B5/65

摘要： Aspects are directed to recording media with enhanced magnetic properties for improved writability. Examples can be included or related to methods, systems and components that allow for improved writability while reducing defects so as to obtain uniform magnetic properties such as uniformly high anisotropy and narrow switching field distribution. Some examples include a recording medium with an exchange tuning layer inserted between the hard layer and the soft, semi-soft or thin semi-hard layer so as to maximize the writability improvement of the media. Preferably, the exchange tuning layer is granular and reduces or optimizes the vertical coupling between the hard layer and the soft, semi-soft or semi-hard layer of a magnetic recording or storing device.

摘要翻译： 方面涉及具有增强的磁性能的记录介质以改善可写性。 可以包括或涉及允许改善可写性同时减少缺陷以获得均匀的磁性能如均匀高的各向异性和窄的开关场分布的方法，系统和组件的实例。 一些示例包括具有插入在硬层和软，半软或薄半硬层之间的交换调谐层的记录介质，以便最大限度地提高介质的可写性。 优选地，交换调谐层是粒状的并且减小或优化硬记录层与磁记录或存储装置的软，半软或半硬层之间的垂直耦合。

公开(公告)号：US20130052485A1

公开(公告)日：2013-02-28

申请号：US13217531

申请日：2011-08-25

申请人： Zhong Wu ,  Li Tang ,  Shoutao Wang ,  Abebe Hailu

发明人： Zhong Wu ,  Li Tang ,  Shoutao Wang ,  Abebe Hailu

IPC分类号： G11B5/66 ,  G11B5/84

CPC分类号： G11B5/66

摘要： A perpendicular magnetic recording stack with a dual continuous layer and a method of manufacturing the same. The perpendicular magnetic recording stack includes a substrate, one or more magnetic granular recording layers, and a dual continuous layer having first and second continuous layers. The first continuous layer, disposed between the second continuous layer and the magnetic granular recording layers, has an intermediate lateral exchange coupling, which is higher than the lateral exchange coupling of the magnetic granular layers. The second continuous layer has a higher lateral exchange coupling than the first continuous layer.

摘要翻译： 具有双连续层的垂直磁记录堆叠及其制造方法。 垂直磁记录堆叠包括基板，一个或多个磁性粒状记录层，以及具有第一和第二连续层的双连续层。 设置在第二连续层和磁性粒状记录层之间的第一连续层具有比磁性颗粒层的横向交换耦合高的中间横向交换耦合。 第二连续层具有比第一连续层更高的横向交换耦合。