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    Disk drive with laminated magnetic thin films with sublayers for magnetic recording
    1.
    发明授权
    Disk drive with laminated magnetic thin films with sublayers for magnetic recording 有权
    具有层叠磁性薄膜的磁盘驱动器，具有用于磁记录的子层

    公开(公告)号：US07976964B2

    公开(公告)日：2011-07-12

    申请号：US11084402

    申请日：2005-03-18

    Applicant: Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    Inventor： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Natacha Frederique Supper

    IPC: G11B5/66

    CPC classification number: G11B5/656 ,  G11B5/66

    Abstract: The invention includes a disk drive with a magnetic recording disk with an upper and lower sublayer in at least one magnetic layer of a laminated magnetic layer structure that includes a spacer layer that substantially decouples the magnetic layers. The lower sublayer has a lower boron content than the upper sublayer and a preferred embodiment is CoPtCrBTa. The upper sublayer is deposited onto the lower sublayer and is preferably CoPtCrB with a higher boron content than the lower sublayer. The composition of the lower sublayer gives it a very low moment with low intrinsic coercivity which would not be useful as a recording layer on its own. The upper sublayer is a higher moment alloy with high intrinsic coercivity. An embodiment of the invention includes a laminated magnetic layer structure which is antiferromagnetically coupled to a lower ferromagnetic layer.

    Abstract translation: 本发明包括具有磁记录盘的磁盘驱动器，该磁盘驱动器具有在层叠磁性层结构的至少一个磁性层中具有上和下子层的磁记录盘，该磁层包括使磁性层基本上分离的间隔层。 下层具有比上层更低的硼含量，优选实施方案是CoPtCrBTa。 上部子层沉积在下部子层上，优选的是具有比下部子层更高的硼含量的CoPtCrB。 下层的组成使得其具有低固有矫顽力的非常低的力矩，其本身不会用作记录层。 上层是具有高固有矫顽力的较高的力矩合金。 本发明的实施例包括层叠的磁性层结构，其被反铁磁耦合到下铁磁层。

    Stability-enhancing underlayer for exchange-coupled magnetic structures, magnetoresistive sensors, and magnetic disk drive systems
    3.
    发明授权
    Stability-enhancing underlayer for exchange-coupled magnetic structures, magnetoresistive sensors, and magnetic disk drive systems 有权
    用于交换耦合磁性结构的稳定性增强型底层，磁阻传感器和磁盘驱动系统

    公开(公告)号：US06836392B2

    公开(公告)日：2004-12-28

    申请号：US09841942

    申请日：2001-04-24

    Applicant: Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Thai Le ,  Stefan Maat ,  Philip Milton Rice

    Inventor： Matthew Joseph Carey ,  Eric Edward Fullerton ,  Bruce Alvin Gurney ,  Thai Le ,  Stefan Maat ,  Philip Milton Rice

    IPC: G11B539

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/012 ,  G11B5/3903 ,  G11B5/3967 ,  H01F10/3277

    Abstract: An exchange-coupled magnetic structure includes a ferromagnetic layer, a coercive ferrite layer, such as cobalt-ferrite, for biasing the magnetization of the ferromagnetic layer, and an oxide underlayer, such as cobalt-oxide, in proximity to the coercive ferrite layer. The oxide underlayer has a lattice structure of either rock salt or a spinel and exhibits no magnetic moment at room temperature. The underlayer affects the structure of the coercive ferrite layer and therefore its magnetic properties, providing increased coercivity and enhanced thermal stability. As a result, the coercive ferrite layer is thermally stable at much smaller thicknesses than without the underlayer. The exchange-coupled structure is used in spin valve and magnetic tunnel junction magnetoresistive sensors in read heads of magnetic disk drive systems. Because the coercive ferrite layer can be made as thin as 1 nm while remaining thermally stable, the sensor satisfies the narrow gap requirements of high recording density systems.

    Abstract translation: 交换耦合磁性结构包括强磁性层，用于偏置铁磁性层的磁化的钴铁氧体的矫顽铁氧体层以及邻近矫顽铁氧体层的氧化钴底层，例如氧化钴。 氧化物底层具有岩盐或尖晶石的晶格结构，并且在室温下不显示磁矩。 底层影响矫顽铁氧体层的结构，因此影响其磁特性，提供增强的矫顽力和增强的热稳定性。 结果，矫顽铁氧体层的热稳定性比没有底层要小得多的厚度。 交换耦合结构用于磁盘驱动系统读磁头中的自旋阀和磁隧道结磁阻传感器。 由于矫顽铁氧体层可以制成1nm的薄而保持热稳定性，所以传感器满足高记录密度系统的窄间隙要求。

    Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate
    4.
    发明授权
    Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate 失效
    具有反铁磁耦合层的叠层磁记录介质作为层压板中的单个磁性层之一

    公开(公告)号：US06773834B2

    公开(公告)日：2004-08-10

    申请号：US10059527

    申请日：2002-01-29

    Applicant: Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    Inventor： Hoa Van Do ,  Eric Edward Fullerton ,  David Thomas Margulies ,  Hal Jervis Rosen

    IPC: G11B566

    CPC classification number: C23C28/021 ,  C23C28/023 ,  C23C28/42 ,  C23C28/44 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/265

    Abstract: A laminated magnetic recording medium for data storage has an antiferromagnetically-coupled (AFC) layer and a single ferromagnetic layer spaced apart by a nonferromagnetic spacer layer. The AFC layer is formed as two ferromagnetic films antiferromagnetically coupled together across an antiferromagnetically coupling film that has a composition and thickness to induce antiferromagnetic coupling. In each of the two remanent magnetic states, the magnetic moments of the two antiferromagnetically-coupled films in the AFC layer are oriented antiparallel, and the magnetic moment of the single ferromagnetic layer and the greater-moment ferromagnetic film of the AFC layer are oriented parallel. The nonferromagnetic spacer layer between the AFC layer and the single ferromagnetic layer has a composition and thickness to prevent antiferromagnetic exchange coupling. The laminated medium has improved thermal stability and reduced intrinsic media noise.

    Abstract translation: 用于数据存储的叠层磁记录介质具有反铁磁耦合（AFC）层和由非铁磁隔离层隔开的单个铁磁层。 AFC层由反铁磁耦合膜反铁磁耦合在一起的两个铁磁膜形成，其具有组成和厚度以诱导反铁磁耦合。 在两个剩余磁状态中的每一个中，AFC层中的两个反铁磁耦​​合膜的磁矩取向反平行，并且单个铁磁层的磁矩和AFC层的较大时刻铁磁膜的取向平行 。 AFC层和单个铁磁层之间的非铁磁间隔层具有防铁磁交换耦合的组成和厚度。 层压介质具有改善的热稳定性和降低的本征介质噪声。

    Patterned magnetic recording media with regions rendered nonmagnetic by ion irradiation
    5.
    发明授权
    Patterned magnetic recording media with regions rendered nonmagnetic by ion irradiation 有权
    图案磁记录介质，通过离子辐照使磁场呈非磁性

    公开(公告)号：US06383598B1

    公开(公告)日：2002-05-07

    申请号：US09602606

    申请日：2000-06-21

    Applicant: Eric Edward Fullerton ,  Dieter Klaus Weller

    Inventor： Eric Edward Fullerton ,  Dieter Klaus Weller

    IPC: B32B302

    CPC classification number: G11B5/855 ,  C22C5/04 ,  G11B5/82 ,  Y10T428/24479 ,  Y10T428/31

    Abstract: A patterned magnetic recording disk has a magnetic recording layer patterned into discrete magnetic and nonmagnetic regions having substantially the same chemical composition. The magnetic regions have a chemically-ordered L12 crystalline structure and the nonmagnetic regions have a chemically-disordered crystalline structure. The chemically-ordered intermetallic compound CrPt3, which is ferromagnetic, is rendered paramagnetic by ion irradiation. This CrPt3 material is patterned by irradiating local regions through a mask to create nonmagnetic regions. The ions pass through the openings in the mask and impact the chemically-ordered CrPt3 in selected regions corresponding to the pattern of holes in the mask. The ions disrupt the ordering of the Cr and Pt atoms in the unit cell and transform the CrPt3 into paramagnetic regions corresponding to the mask pattern, with the regions of the film not impacted by the ions retaining their chemically-ordered structure.

    Abstract translation: 图案化磁记录盘具有图案化成具有基本上相同化学成分的离散磁性和非磁性区域的磁记录层。 磁性区域具有化学有序的L12结晶结构，非磁性区域具有化学无序的结晶结构。 铁磁性的化学有序金属间化合物CrPt3通过离子照射而变得顺磁性。 通过用掩模照射局部区域来形成该CrPt3材料以形成非磁性区域。 离子通过掩模中的开口，并在对应于掩模中的孔图案的选定区域中冲击化学有序的CrPt3。 离子破坏单元电池中Cr和Pt原子的排列，并将CrPt3转变成对应于掩模图案的顺磁区域，膜的区域不受保留其化学有序结构的离子的影响。

    Perpendicular magnetic recording system with patterned medium and manufacturing process for the medium
    6.
    发明授权
    Perpendicular magnetic recording system with patterned medium and manufacturing process for the medium 失效
    垂直磁记录系统具有图案化介质和制造工艺的介质

    公开(公告)号：US07732071B2

    公开(公告)日：2010-06-08

    申请号：US11558846

    申请日：2006-11-10

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

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

    IPC: G11B5/66

    CPC classification number: G11B5/855 ,  G11B5/66 ,  G11B5/667 ,  G11B5/7325

    Abstract: 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.

    Abstract translation: 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。

    Perpendicular Recording Media Having an Exchange-Spring Structure
    7.
    发明申请
    Perpendicular Recording Media Having an Exchange-Spring Structure 有权
    具有交换弹簧结构的垂直记录介质

    公开(公告)号：US20100128391A1

    公开(公告)日：2010-05-27

    申请号：US12691603

    申请日：2010-01-21

    Applicant: Andreas Berger ,  Eric Edward Fullerton ,  Hoa Van Do ,  Natacha Supper

    Inventor： Andreas Berger ,  Eric Edward Fullerton ,  Hoa Van Do ,  Natacha Supper

    IPC: G11B5/127 ,  G11B5/65 ,  G11B5/84

    CPC classification number: G11B5/66 ,  G11B5/656

    Abstract: A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.

    Abstract translation: 在垂直记录应用中提供改善的写入能力的记录介质包括具有基本上垂直于其表面的磁各向异性轴的磁记录层，耦合到磁记录层并具有小于磁记录的矫顽磁力的磁性交换弹簧层 层矫顽力和磁记录层与交换弹簧层之间的耦合层。 耦合层调节磁记录层与交换弹簧层之间的铁磁交换耦合。

    Perpendicular recording media having an exchange-spring structure
    8.
    发明授权
    Perpendicular recording media having an exchange-spring structure 失效
    具有交换弹簧结构的垂直记录介质

    公开(公告)号：US07687157B2

    公开(公告)日：2010-03-30

    申请号：US11231516

    申请日：2005-09-21

    Applicant: Andreas Berger ,  Eric Edward Fullerton ,  Hoa Van Do ,  Natacha Supper

    Inventor： Andreas Berger ,  Eric Edward Fullerton ,  Hoa Van Do ,  Natacha Supper

    IPC: G11B5/66

    CPC classification number: G11B5/66 ,  G11B5/656

    Abstract: A recording medium providing improved writeability in perpendicular recording applications includes a magnetic recording layer having an axis of magnetic anisotropy substantially perpendicular to the surface thereof, an exchange-spring layer ferromagnetically exchange coupled to the magnetic recording layer and having a coercivity less than the magnetic recording layer coercivity, and a coupling layer between the magnetic recording layer and the exchange-spring layer. The coupling layer regulates the ferromagnetic exchange coupling between the magnetic recording layer and the exchange-spring layer.

    Abstract translation: 在垂直记录应用中提供改善的写入能力的记录介质包括具有基本上垂直于其表面的磁各向异性轴的磁记录层，耦合到磁记录层并具有小于磁记录的矫顽磁力的磁性交换弹簧层 层矫顽力和磁记录层与交换弹簧层之间的耦合层。 耦合层调节磁记录层与交换弹簧层之间的铁磁交换耦合。

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