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    SiN overcoat for perpendicular magnetic recording media
    1.
    发明授权
    SiN overcoat for perpendicular magnetic recording media 失效
    用于垂直磁记录介质的SiN外涂层

    公开(公告)号：US07758982B2

    公开(公告)日：2010-07-20

    申请号：US11218702

    申请日：2005-09-02

    申请人： Qing Dai ,  Hoa Van Do ,  Min Xiao ,  Bing K Yen

    发明人： Qing Dai ,  Hoa Van Do ,  Min Xiao ,  Bing K Yen

    IPC分类号： G11B5/716

    CPC分类号： G11B5/72 ,  G11B5/8408

    摘要： A SiON overcoat for use on magnetic media for magnetic recording. The SiON overcoat is deposited by pulsed DC sputtering while applying a negative DC bias. The SiON overcoat is especially useful on perpendicular magnetic recording media because of its ability to deposit thinly and evenly on a rough, granular high coercivity recording media while maintaining excellent corrosion protection properties. A SiON overcoat can be applied less than 3 nm thick while still maintaining excellent mechanical and corrosion protection. The overcoat also has a very high density and water contact angle.

    摘要翻译： 用于磁性介质磁记录的SiON外套。 通过脉冲DC溅射沉积SiON外涂层，同时施加负DC偏压。 SiON外涂层在垂直磁记录介质中特别有用，因为它能够在粗糙的颗粒状高矫顽力记录介质上薄薄均匀地沉积，同时保持优异的防腐蚀性能。 SiON外涂层可以施加小于3nm厚，同时仍然保持优异的机械和腐蚀保护。 外套也具有非常高的密度和水接触角。

    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER
    2.
    发明申请
    PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH MULTILAYER RECORDING STRUCTURE INCLUDING INTERGRANULAR EXCHANGE ENHANCEMENT LAYER 审中-公开
    具有多层记录结构的特殊磁记录介质，包括交互式增强层

    公开(公告)号：US20080138662A1

    公开(公告)日：2008-06-12

    申请号：US11567908

    申请日：2006-12-07

    申请人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    发明人： Andreas Klaus Berger ,  Qing Dai ,  Hoa Van Do ,  Yoshihiro Ikeda ,  David Thomas Margulies ,  Natacha F. Supper ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/706

    CPC分类号： G11B5/66 ,  G11B5/65

    摘要： A perpendicular magnetic recording medium has a multilayer recording layer (RL) structure that includes a ferromagnetic intergranular exchange enhancement layer for mediating intergranular exchange coupling in the other ferromagnetic layers in the RL structure. The RL structure may be a multilayer of a first ferromagnetic layer (MAG1) of granular polycrystalline Co alloy with Ta-oxide, a second ferromagnetic layer (MAG2) of granular polycrystalline Co alloy with Si-oxide, and an oxide-free CoCr capping layer on top of and in contact with MAG2 for mediating intergranular exchange coupling in MAG1 and MAG2. The RL structure may also be a multilayer of an intergranular exchange enhancement interlayer (IL) in between two ferromagnetic layers, MAG1 and MAG2, each with reduced or no intergranular exchange coupling. Because the IL is in direct contact with both MAG1 and MAG2, it directly mediates intergranular exchange coupling in each of MAG1 and MAG2.

    摘要翻译： 垂直磁记录介质具有多层记录层（RL）结构，其包括用于介导RL结构中的其它铁磁层中的晶间交换耦合的铁磁晶间交换增强层。 RL结构可以是具有Ta氧化物的粒状多晶Co合金的第一铁磁层（MAG1），具有Si氧化物的粒状多晶Co合金的第二铁磁层（MAG 2）和不含无氧化物的CoCr的多层 在MAG1和MAG2之间介导晶间交换耦合的MAG 2顶部并与MAG 2接触的封盖层.RR结构还可以是两个铁磁层之间的晶间交换增强中间层（IL）的多层，MAG 1和MAG 2，每个都有减少或没有晶间交换耦合。 因为IL与MAG 1和MAG 2直接接触，所以它直接介导MAG1和MAG2中的每一个中的晶间交换耦合。

    Perpendicular magnetic recording disk with improved recording layer having high oxygen content
    5.
    发明授权
    Perpendicular magnetic recording disk with improved recording layer having high oxygen content 有权
    垂直磁记录盘，具有改善的氧含量高的记录层

    公开(公告)号：US07482071B2

    公开(公告)日：2009-01-27

    申请号：US11135750

    申请日：2005-05-24

    申请人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    发明人： Hoa Van Do ,  Bernd Heinz ,  Yoshihiro Ikeda ,  Kentaro Takano ,  Min Xiao

    IPC分类号： G11B5/66

    CPC分类号： G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/667 ,  G11B5/732

    摘要： A perpendicular magnetic recording disk has an improved recording layer of a granular CoPtCr-based ferromagnetic alloy with inter-granular material made up of one or more oxides of Cr and one or more oxides of one or more of a segregant of Si, Ta, Ti, B, Nb or Hf, wherein the amount of oxygen present in the recording layer is greater than about 22 atomic percent and less than about 35 atomic percent. The amount of oxygen in the recording layer is substantially greater than the amount required for the stoichiometric oxide or oxides of the segregant or segregants, and a substantial portion of the oxygen present in the recording layer is present in the inter-granular material. The recording layer exhibits high signal-to-noise ratio (SNR), a coercivity Hc greater than about 5000 Oe and a nucleation field Hn greater (more negative) than about −1500 Oe.

    摘要翻译： 垂直磁记录盘具有改进的基于CoPtCr的铁磁性合金的记录层，其具有由一种或多种Cr的一种或多种氧化物和一种或多种Si，Ta，Ti分离的一种或多种氧化物构成的颗粒间材料 ，B，Nb或Hf，其中存在于记录层中的氧的量大于约22原子％且小于约35原子％。 记录层中的氧气量基本上大于分离器或分离器的化学计量氧化物或氧化物所需的量，并且记录层中存在的大部分氧气存在于颗粒间材料中。 记录层显示出高的信噪比（SNR），矫顽力Hc大于约5000Oe，成核场Hn大于（大于负））大于约-1500Oe。

    Disk drive with laminated magnetic thin films with sublayers for magnetic recording
    7.
    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

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

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

    IPC分类号： G11B5/66

    CPC分类号： G11B5/656 ,  G11B5/66

    摘要： 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.

    摘要翻译： 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。

    Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields
    8.
    发明授权
    Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields 有权
    具有多个具有基本相似的各向异性场的交换耦合磁性层的垂直磁记录介质

    公开(公告)号：US07550210B2

    公开(公告)日：2009-06-23

    申请号：US11372295

    申请日：2006-03-09

    申请人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric E. Fullerton ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

    发明人： Andreas Klaus Berger ,  Hoa Van Do ,  Eric E. Fullerton ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

    IPC分类号： G11B5/66

    CPC分类号： G11B5/66

    摘要： A perpendicular magnetic recording medium has an “exchange-spring” type magnetic recording layer (RL) formed of two ferromagnetic layers with substantially similar anisotropy fields that are ferromagnetically exchange-coupled by a nonmagnetic or weakly ferromagnetic coupling layer. Because the write head produces a larger magnetic field and larger field gradient at the upper portion of the RL, while the field strength decreases further inside the RL, the upper ferromagnetic layer can have a high anisotropy field. The high field and field gradient near the top of the RL, where the upper ferromagnetic layer is located, reverses the magnetization of the upper ferromagnetic layer, which then assists in the magnetization reversal of the lower ferromagnetic layer. Because both ferromagnetic layers in this exchange-spring type RL have a high anisotropy field, the thermal stability of the medium is not compromised. The medium shows improved writability, i.e., a low switching field, as well as lower intrinsic media noise, over a medium with a conventional single-layer RL.

    摘要翻译： 垂直磁记录介质具有由具有基本相似的各向异性场的两个铁磁层形成的“交换弹簧”型磁记录层（RL），其通过非磁性或弱铁磁耦合层进行铁磁交换耦合。 由于写头在RL的上部产生较大的磁场和较大的场梯度，而在RL内的场强进一步降低，所以上铁磁层可以具有高的各向异性场。 在RL的顶部附近的高场磁场梯度，其中上铁磁层位于其上，反转上铁磁层的磁化，其随后有助于下铁磁层的磁化反转。 由于这种交换弹簧型RL中的两个铁磁层具有高各向异性场，所以介质的热稳定性不受影响。 在具有常规单层RL的介质上，介质显示改进的可写性，即低切换场，以及较低的固有介质噪声。

    Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layer
    9.
    发明授权
    Magnetic recording medium having three ferromagnetic layers with increasing intrinsic coercivity from the lower to the upper layer 失效
    具有三层铁磁层的磁记录介质，其具有从下层到上层增加的固有矫顽力

    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。

    Laminated magnetic recording media with antiferromagnetically coupled layer as one of the individual magnetic layers in the laminate
    10.
    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

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

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

    IPC分类号： G11B566

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

    摘要： 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.

    摘要翻译： 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。