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11. 发明申请

US20050259362A1 Laminated magnetic recording medium having improved signal-to-noise ratio 失效
标题翻译：具有提高的信噪比的层压磁记录介质
公开(公告)号：US20050259362A1
公开(公告)日：2005-11-24
申请号：US10853431
申请日：2004-05-24
申请人： Hoa Do , David Margulies , Hal Rosen , Natacha Supper
发明人： Hoa Do , David Margulies , Hal Rosen , Natacha Supper
IPC分类号： G11B5/64 , G11B5/66 , G11B5/82
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。}

12. 发明申请

US20070212574A1 Perpendicular magnetic recording medium with multiple exchange-coupled magnetic layers having substantially similar anisotropy fields 有权
标题翻译：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：US20070212574A1
公开(公告)日：2007-09-13
申请号：US11372295
申请日：2006-03-09
申请人： Andreas Berger , Hoa Do , Eric Fullerton , Yoshihiro Ikeda , Byron Lengsfield , Natacha Supper
发明人： Andreas Berger , Hoa Do , Eric Fullerton , Yoshihiro Ikeda , Byron Lengsfield , Natacha 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。

13. 发明申请

US20070037017A1 Antiferromagnetically coupled media for magnetic recording with weak coupling layer 失效
标题翻译：用于具有弱耦合层的磁记录的反铁磁耦合介质
公开(公告)号：US20070037017A1
公开(公告)日：2007-02-15
申请号：US11204979
申请日：2005-08-15
申请人： Hoa Do , Eric Fullerton , David Margulies , Natacha Supper
发明人： Hoa Do , Eric Fullerton , David Margulies , Natacha Supper
IPC分类号： G11B5/66
CPC分类号： G11B5/66
摘要： An embodiment of the invention is a layered magnetic thin film structure that uses antiferromagnetically coupled (AFC) magnetic layers where the top layer structure consists of an upper magnetic layer that is weakly ferromagnetically coupled via a nonmagnetic or weakly magnetic exchange coupling layer (interlayer) to a ferromagnetic exchange enhancing layer that is in turn, AF coupled to the lower ferromagnetic layer of the AFC structure. Preferred materials for the weak coupling layer include alloys of cobalt such as CoRu, CoBRu and CoCr in which the Co content is below the point at which the material would be ferromagnetic. A second embodiment of the invention is a laminated, AF-coupled media structure. In this structure the lower AFC layer that makes up the lower laminate layer includes: the middle magnetic layer, the weak ferromagnetic coupling layer, and the exchange enhancing layer.
摘要翻译：本发明的一个实施例是使用反铁磁耦合（AFC）磁性层的层状磁性薄膜结构，其中顶层结构由通过非磁性或弱磁性交换耦合层（中间层）弱铁磁耦合的上部磁性层组成，铁磁交换增强层，其依次是AF耦合到AFC结构的下铁磁层。用于弱耦合层的优选材料包括诸如CoRu，CoBRu和CoCr的钴的合金，其中Co含量低于材料将是铁磁性的点。本发明的第二实施例是层叠的AF耦合介质结构。在该结构中，构成下层叠层的下部AFC层包括：中间磁性层，弱铁磁性结合层和交换增强层。

14. 发明申请

US20050259351A1 Magnetic recording system with three-layer laminated media having improved signal-to-noise ratio 失效
标题翻译：具有提高的信噪比的具有三层层压介质的磁记录系统
公开(公告)号：US20050259351A1
公开(公告)日：2005-11-24
申请号：US10853631
申请日：2004-05-24
申请人： Hoa Do , David Margulies , Hal Rosen , Natacha Supper
发明人： Hoa Do , David Margulies , Hal Rosen , Natacha Supper
IPC分类号： G11B5/66 , G11B17/00
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。}

15. 发明授权

US07713591B2 Longitudinal patterned media with circumferential anisotropy for ultra-high density magnetic recording 有权
标题翻译：具有圆周各向异性的纵向图案介质，用于超高密度磁记录
公开(公告)号：US07713591B2
公开(公告)日：2010-05-11
申请号：US11209275
申请日：2005-08-22
申请人： Manfred Albrecht , Andreas Moser , Natacha Supper , Bruce Terris
发明人： Manfred Albrecht , Andreas Moser , Natacha Supper , Bruce Terris
IPC分类号： C23C14/48 , C23C14/58 , C23C14/14 , B05D5/00 , B05D3/06
CPC分类号： G11B5/852 , G11B5/855
摘要： An apparatus and method is disclosed for orienting the magnetic anisotropy of longitudinal patterned magnetic recording media. A disk-shaped longitudinal granular magnetic recording medium is provided having a high orientation ratio in the circumferential direction. The medium is then patterned to form a uniform array of magnetic islands. The magnetic islands are then irradiated with ions to increase the magnetic exchange coupling between the grains of each island. This aligns the axes of magnetic anisotropy of the individual grains with the average axis of magnetic anisotropy of the grains, thereby aligning the magnetic anisotropy of each island along the circumferential direction.
摘要翻译：公开了用于定向纵向图案化磁记录介质的磁各向异性的装置和方法。在圆周方向上具有高取向比的圆盘状纵向粒状磁记录介质。然后将介质图案化以形成均匀的磁岛阵列。然后用离子照射磁岛以增加每个岛的颗粒之间的磁交换耦合。使各晶粒的磁各向异性轴与晶粒的磁各向异性的平均轴对齐，从而沿着圆周方向对准各岛的磁各向异性。

16. 发明申请

US20070042229A1 Longitudinal patterned media with circumferential anisotropy for ultra-high density magnetic recording 有权
标题翻译：具有圆周各向异性的纵向图案介质，用于超高密度磁记录
公开(公告)号：US20070042229A1
公开(公告)日：2007-02-22
申请号：US11209275
申请日：2005-08-22
申请人： Manfred Albrecht , Andreas Moser , Natacha Supper , Bruce Terris
发明人： Manfred Albrecht , Andreas Moser , Natacha Supper , Bruce Terris
IPC分类号： G11B5/65 , B05D5/12 , B29C71/04
CPC分类号： G11B5/852 , G11B5/855
摘要： An apparatus and method is disclosed for orienting the magnetic anisotropy of longitudinal patterned magnetic recording media. A disk-shaped longitudinal granular magnetic recording medium is provided having a high orientation ratio in the circumferential direction. The medium is then patterned to form a uniform array of magnetic islands. The magnetic islands are then irradiated with ions to increase the magnetic exchange coupling between the grains of each island. This aligns the axes of magnetic anisotropy of the individual grains with the average axis of magnetic anisotropy of the grains, thereby aligning the magnetic anisotropy of each island along the circumferential direction.
摘要翻译：公开了用于定向纵向图案化磁记录介质的磁各向异性的装置和方法。在圆周方向上具有高取向比的圆盘状纵向粒状磁记录介质。然后将介质图案化以形成均匀的磁岛阵列。然后用离子照射磁岛以增加每个岛的颗粒之间的磁交换耦合。使各晶粒的磁各向异性轴与晶粒的磁各向异性的平均轴对齐，从而沿着圆周方向对准各岛的磁各向异性。

17. 发明申请

US20060199042A1 Method and apparatus for improving signal-to-noise ratio in longitudinal recording media 失效
公开(公告)号：US20060199042A1
公开(公告)日：2006-09-07
申请号：US11073890
申请日：2005-03-07
申请人： Eric Fullerton , David Margulies , Natacha Supper , Hoa Do
发明人： Eric Fullerton , David Margulies , Natacha Supper , Hoa Do
IPC分类号： G11B5/66 , C23C14/00
CPC分类号： G11B5/66 , G11B5/732 , G11B5/7325 , G11B5/851
摘要： A method and apparatus for improving the signal-to-noise ratio in a longitudinal recording media is disclosed. The apparatus includes a first recording layer of the longitudinal recording media residing at the top of a recording media structure. The first recording layer includes an upper sublayer comprised of a CoPtCrB-based alloy material. The first recording layer also includes a lower sublayer comprised of a CoPtCrB-based alloy material and a middle sublayer comprised of a CoCrB-alloy. The middle sublayer is coupled to the upper sublayer and to the lower sublayer and is substantially thinner than the upper sublayer and the lower sublayer.

18. 发明申请

US20060177704A1 Perpendicular recording media having an exchange-spring structure 失效
标题翻译：具有交换弹簧结构的垂直记录介质
公开(公告)号：US20060177704A1
公开(公告)日：2006-08-10
申请号：US11231516
申请日：2005-09-21
申请人： Andreas Berger , Eric Fullerton , Hoa Do , Natacha Supper
发明人： Andreas Berger , Eric Fullerton , Hoa Do , Natacha Supper
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/656
摘要： 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.
摘要翻译：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。

19. 发明申请

US20060177700A1 Incoherently-reversing magnetic laminate with exchange coupled ferromagnetic layers 有权
标题翻译：具有交换耦合铁磁层的不相干反磁性层压板
公开(公告)号：US20060177700A1
公开(公告)日：2006-08-10
申请号：US11051536
申请日：2005-02-04
申请人： Eric Fullerton , Hoa Do , David Margulies , Natacha Supper
发明人： Eric Fullerton , Hoa Do , David Margulies , Natacha Supper
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/656 , Y10T428/24975
摘要： A laminate structure is disclosed comprising multiple ferromagnetic layers achieving incoherent reversal while maintaining good SNR. A high magnetic moment density, low anisotropy field material may form a thin overlayer deposited over a high-anisotropy media layer. The media layer may have a lower magnetic moment density than the overlayer and have decoupled magnetic grains. A coupling layer may be interposed between the overlayer and the media layer to modulate the exchange there between, thereby reducing the pass-through of noise while still promoting incoherent reversal to achieve reduced write energy requirements.
摘要翻译：公开了一种层叠结构，其包括多个铁磁层，同时保持良好的SNR，实现非相干反转。高磁矩密度低的各向异性场材料可以形成沉积在高各向异性介质层上的薄覆盖层。介质层可以具有比覆盖层更低的磁矩密度并且具有去耦的磁性颗粒。耦合层可以插入在覆盖层和介质层之间以调制其间的交换，从而减少噪声的通过，同时仍然促进不相干的反转以实现降低的写入能量需求。

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