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公开(公告)号：US10438622B2
公开(公告)日：2019-10-08
申请号：US16044574
申请日：2018-07-25
申请人： FUJIFILM Corporation
发明人： Norihito Kasada , Eiki Ozawa
摘要： The magnetic tape device includes a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a servo pattern in the magnetic layer, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050, and a ratio (Sdc/Sac) of an average area Sdc of a magnetic cluster of the magnetic tape in a DC demagnetization state and an average area Sac of a magnetic cluster thereof in an AC demagnetization state measured with a magnetic force microscope is 0.80 to 1.30.
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公开(公告)号：US10438621B2
公开(公告)日：2019-10-08
申请号：US15900334
申请日：2018-02-20
申请人： FUJIFILM Corporation
发明人： Norihito Kasada
摘要： A magnetic tape includes a non-magnetic support; a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support; and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support. The thickness of the back coating layer is less than or equal to 0.30 μm. The logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is less than or equal to 0.060. Further, the contact angle with respect to 1-bromonaphthalene measured regarding the surface of the back coating layer is 15.0° to 30.0°.
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公开(公告)号：US10062403B1
公开(公告)日：2018-08-28
申请号：US15900412
申请日：2018-02-20
申请人： FUJIFILM Corporation
发明人： Norihito Kasada , Eiki Ozawa
摘要： The magnetic tape device includes a magnetic tape; and a servo head, in which the servo head is a TMR head, the magnetic tape includes a servo pattern in the magnetic layer, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050, and a ratio (Sdc/Sac) of an average area Sdc of a magnetic cluster of the magnetic tape in a DC demagnetization state and an average area Sac of a magnetic cluster thereof in an AC demagnetization state measured with a magnetic force microscope is 0.80 to 1.30.
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公开(公告)号：US09972351B1
公开(公告)日：2018-05-15
申请号：US15854410
申请日：2017-12-26
申请人： FUJIFILM Corporation
发明人： Tetsuya Kaneko , Norihito Kasada , Eiki Ozawa
CPC分类号： G11B5/702 , G11B5/00826 , G11B5/3909 , G11B5/584 , G11B5/68 , G11B5/70 , G11B5/84
摘要： The magnetic tape device including: a magnetic tape; and a servo head, in which the servo head is a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the magnetic layer includes a servo pattern, and logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding a surface of the magnetic layer is equal to or smaller than 0.050.
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公开(公告)号：US20170178675A1
公开(公告)日：2017-06-22
申请号：US15378907
申请日：2016-12-14
申请人： FUJIFILM Corporation
发明人： Norihito KASADA
摘要： The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on the surface on one side of a nonmagnetic support and has a backcoat layer containing nonmagnetic powder and binder on the surface on the other side thereof, wherein the centerline average surface roughness Ra as measured on the surface on the magnetic layer side of the magnetic tape is less than or equal to 1.8 nm, the logarithmic decrement as determined by a pendulum viscoelasticity test on the surface on the magnetic layer side of the magnetic tape is less than or equal to 0.050, and the logarithmic decrement as determined by a pendulum viscoelasticity test on the surface on the backcoat layer side is less than or equal to 0.060.
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公开(公告)号：US09218850B1
公开(公告)日：2015-12-22
申请号：US14581274
申请日：2014-12-23
申请人： WD Media, LLC
CPC分类号： G11B33/1406 , G11B5/4866 , G11B5/653 , G11B5/66 , G11B5/68 , G11B5/725 , G11B5/84 , G11B5/8408 , G11B2005/0021
摘要： A heat-assisted magnetic recording (HAMR) medium having improved signal-to-noise ratio capabilities includes a high-temperature exchange break layer (EBL) inserted between magnetic recording layers, where the high-temperature exchange break layer material is capable of maintaining its chemical properties at temperatures exceeding 300° C. The high-temperature EBL may include a non-metallic compound including at least one of an oxide, a carbide, and a nitride.
摘要翻译： 具有改善的信噪比能力的热辅助磁记录（HAMR）介质包括插入在磁记录层之间的高温交换断裂层（EBL），其中高温交换断层材料能够保持其 在超过300℃的温度下的化学性质。高温EBL可以包括包含氧化物，碳化物和氮化物中的至少一种的非金属化合物。
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7.发明授权公开(公告)号：US09019653B2
公开(公告)日：2015-04-28
申请号：US13964643
申请日：2013-08-12
发明人： Robert G. Biskeborn , Mark A. Lantz
CPC分类号： G11B5/584 , G11B5/00817 , G11B5/00826 , G11B5/23 , G11B5/4893 , G11B5/68 , G11B20/1201
摘要： A product, according to one embodiment, includes a magnetic recording tape having opposite ends, a longitudinal axis of the magnetic recording tape being defined between the ends. The magnetic recording tape has at least one servo track, the at least one servo track having a plurality of first magnetic bars and a plurality of third magnetic bars oriented to form chevron-like patterns with the first magnetic bars. The first magnetic bars each have a longitudinal axis oriented at a first angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape. The third magnetic bars each have a longitudinal axis oriented at a second angle between 2 and 88 degrees from the longitudinal axis of the magnetic recording tape, the second angle having a different numerical absolute value than the first angle.
摘要翻译： 根据一个实施例的产品包括具有相对端的磁记录带，磁记录带的纵向轴线被限定在两端之间。 磁记录带具有至少一个伺服轨道，该至少一个伺服轨道具有多个第一磁条和多个第三磁条，其定向成与第一磁条形成人字形图案。 第一磁条各自具有相对于磁记录带的纵向轴线以2至88度之间的第一角度定向的纵向轴线。 第三磁条各自具有从磁记录带的纵向轴线以2至88度之间的第二角度定向的纵向轴线，第二角度具有与第一角度不同的数值绝对值。
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8.发明申请公开(公告)号：US20130293983A1
公开(公告)日：2013-11-07
申请号：US13798349
申请日：2013-03-13
申请人： HITACHI, LTD.
CPC分类号： G11B5/68 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/718 , G11B5/746 , G11B2005/0024
摘要： Provided is a magnetic recording medium achieving both of reduction in switching field distribution and reduction in switching field intensity by high-frequency magnetic field, thus enabling high-density recording. Magnetic grains of the magnetic recording medium are made up of a recording layer and a resonance layer. The resonance layer is disposed closer to a protective layer 5 than the recording layer, and a magnetic material of the recording layer has anisotropy field 1.2 times or more anisotropy field of a magnetic material of the resonance layer. The magnetic material of the recording layer has saturation magnetization substantially equal to saturation magnetization of the magnetic material of the resonance layer. At the entire resonance layer and a part of the recording layer, the magnetic grains are separated from surrounding magnetic grains by a nonmagnetic material, and at a part of the recording layer, the magnetic grains are coupled with surrounding magnetic grains.
摘要翻译： 提供了一种磁记录介质，其通过高频磁场实现开关场分布的减小和开关场强的降低，从而实现高密度记录。 磁记录介质的磁性颗粒由记录层和谐振层组成。 谐振层设置成比记录层更靠近保护层5，并且记录层的磁性材料具有共振层的磁性材料的各向异性场的1.2倍以上的各向异性场。 记录层的磁性材料具有与谐振层的磁性材料的饱和磁化强度基本相等的饱和磁化强度。 在整个共振层和记录层的一部分，磁性颗粒通过非磁性材料与周围的磁性颗粒分离，并且在记录层的一部分，磁性颗粒与周围的磁性颗粒结合。
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9.发明申请公开(公告)号：US20100055504A1
公开(公告)日：2010-03-04
申请号：US12548152
申请日：2009-08-26
申请人： Kazufumi OMURA
发明人： Kazufumi OMURA
摘要： An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a compound denoted by general formula (I): wherein, in general formula (I), each of R10 and R13 independently denotes a hydrogen atom, alkyl group, or aryl group, each of R11 and R12 independently denotes an alkyl group or an aryl group, and L denotes a single bond or an oxygen atom.
摘要翻译： 本发明的一个方面涉及一种改变粉末表面的方法，包括将粉末与通式（I）表示的化合物混合：其中，在通式（I）中，R 10和R 13各自独立地表示 氢原子，烷基或芳基，R 11和R 12各自独立地表示烷基或芳基，L表示单键或氧原子。
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公开(公告)号：US07274531B2
公开(公告)日：2007-09-25
申请号：US10641627
申请日：2003-08-15
申请人： Peter Dickey , Raoul Standt , Kurt Buckland
发明人： Peter Dickey , Raoul Standt , Kurt Buckland
CPC分类号： G11B15/6835
摘要： In one exemplary embodiment an automated storage library is provided. The automated storage library may include a media drive, an array of storage bins for holding storage devices, and a robotic transfer mechanism for transporting storage devices between the media drive and the storage bins. The storage library includes a housing for supporting the media drive, the robotic transfer mechanism, and the storage bins, and a structure within the housing that is associated with one or more storage bins, wherein the structure is extendable at least partially from the housing.
摘要翻译： 在一个示例性实施例中，提供自动存储库。 自动存储库可以包括媒体驱动器，用于保存存储设备的存储箱阵列，以及用于在介质驱动器和存储箱之间传送存储设备的机器人传送机构。 存储库包括用于支撑介质驱动器的壳体，机器人传送机构和存储箱，以及壳体内与一个或多个存储箱相关联的结构，其中该结构至少部分地可从外壳延伸。
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