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    MAGNETIC RECORDING MEDIUM
    1.
    发明申请
    MAGNETIC RECORDING MEDIUM 有权
    磁记录介质

    公开(公告)号：US20070224457A1

    公开(公告)日：2007-09-27

    申请号：US11754911

    申请日：2007-05-29

    申请人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    发明人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    IPC分类号： G11B5/706

    CPC分类号： H01F10/126 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/714 ,  H01F10/142

    摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer formed on the support and containing a magnetic powder and a binder, wherein said magnetic powder comprises substantially spherical or ellipsoidal particles and at least one element selected from the group consisting of rare earth elements, silicon and aluminum, and has a Fe16N2 phase, an average particle size of 5 to 30 nm and an axis ratio (a ratio of a major axis to a minor axis) of 1 to 2. This magnetic recording medium achieves a high output and has excellent short wavelength recording properties, since it uses a magnetic powder having a very small particle size and has a very high coercive force and a saturation magnetization suitable for high density recording.

    摘要翻译： 一种磁记录介质，包括形成在所述载体上并含有磁性粉末和粘合剂的非磁性载体和磁性层，其中所述磁性粉末包含基本上球形或椭圆形的颗粒和至少一种选自稀土元素， 硅和铝，并且具有Fe 16 N 2 N 2相，平均粒度为5〜30nm，轴比（长轴与次要的比例） 轴）为1〜2。这种磁记录介质实现了高输出并且具有优异的短波长记录性能，因为它使用具有非常小的粒度并且具有非常高的矫顽力和适合于高密度的饱和磁化强度的磁粉 记录。

    Magnetic recording medium containing particles with a core containing a Fe16N2 phase
    2.
    发明授权
    Magnetic recording medium containing particles with a core containing a Fe16N2 phase 有权
    磁记录介质含有含有Fe16N2相的核的颗粒

    公开(公告)号：US07238439B2

    公开(公告)日：2007-07-03

    申请号：US10489735

    申请日：2004-02-18

    申请人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    发明人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    IPC分类号： G11B5/706 ,  G11B5/712

    CPC分类号： H01F10/126 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/714 ,  H01F10/142

    摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer formed on the support and containing a magnetic powder and a binder, wherein said magnetic powder comprises substantially spherical or ellipsoidal particles and at least one element selected from the group consisting of rare earth elements, silicon and aluminum, and has a Fe16N2 phase, an average particle size of 5 to 30 nm and an axis ratio (a ratio of a major axis to a minor axis) of 1 to 2. This magnetic recording medium achieves a high output and has excellent short wavelength recording properties, since it uses a magnetic powder having a very small particle size and has a very high coercive force and a saturation magnetization suitable for high density recording.

    摘要翻译： 一种磁记录介质，包括形成在所述载体上并含有磁性粉末和粘合剂的非磁性载体和磁性层，其中所述磁性粉末包含基本上球形或椭圆形的颗粒和至少一种选自稀土元素， 硅和铝，并且具有Fe 16 N 2 N 2相，平均粒度为5〜30nm，轴比（长轴与次要的比例） 轴）为1〜2。这种磁记录介质实现了高输出并且具有优异的短波长记录性能，因为它使用具有非常小的粒度并且具有非常高的矫顽力和适合于高密度的饱和磁化强度的磁粉 记录。

    Magnetic recording medium containing particles with a core containing a FE16N2 phase
    3.
    发明授权
    Magnetic recording medium containing particles with a core containing a FE16N2 phase 有权
    含有含有FE16N2相核心的颗粒的磁记录介质

    公开(公告)号：US07700204B2

    公开(公告)日：2010-04-20

    申请号：US11754911

    申请日：2007-05-29

    申请人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    发明人： Yuji Sasaki ,  Mikio Kishimoto ,  Naoki Usuki

    IPC分类号： G11B5/706 ,  G11B5/712

    CPC分类号： H01F10/126 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/714 ,  H01F10/142

    摘要： A magnetic recording medium comprising a nonmagnetic support and a magnetic layer formed on the support and containing a magnetic powder and a binder, wherein said magnetic powder comprises substantially spherical or ellipsoidal particles and at least one element selected from the group consisting of rare earth elements, silicon and aluminum, and has a Fe16N2 phase, an average particle size of 5 to 30 nm and an axis ratio (a ratio of a major axis to a minor axis) of 1 to 2. This magnetic recording medium achieves a high output and has excellent short wavelength recording properties, since it uses a magnetic powder having a very small particle size and has a very high coercive force and a saturation magnetization suitable for high density recording.

    摘要翻译： 一种磁记录介质，包括形成在所述载体上并含有磁性粉末和粘合剂的非磁性载体和磁性层，其中所述磁性粉末包含基本上球形或椭圆形的颗粒和至少一种选自稀土元素， 硅和铝，并且具有Fe-160N2相，平均粒度为5〜30nm，轴比（长轴与短轴的比）为1〜2。该磁记录介质实现了高输出，具有 优异的短波长记录性能，因为它使用具有非常小的粒径的磁粉，并且具有非常高的矫顽力和适用于高密度记录的饱和磁化强度。

    Magnetic recording medium
    4.
    发明申请
    Magnetic recording medium 审中-公开
    磁记录介质

    公开(公告)号：US20080075981A1

    公开(公告)日：2008-03-27

    申请号：US11898183

    申请日：2007-09-10

    申请人： Kazutaka Matsuo ,  Mikio Kishimoto ,  Yuji Sasaki

    发明人： Kazutaka Matsuo ,  Mikio Kishimoto ,  Yuji Sasaki

    IPC分类号： G11B5/706

    CPC分类号： G11B5/70626 ,  G11B5/712 ,  G11B5/714

    摘要： A magnetic recording medium having a nonmagnetic support and a magnetic layer formed on at least one surface of the support and containing a magnetic powder and a binder in which the magnetic powder includes at least iron and nitrogen as constituent elements, contains a Fe16N2 phase and has a spherical or ellipsoidal particle shape and an average particle size of 5 to 50 nm, and the magnetic layer contains 0.01 to 20% by weight of a silicon-containing compound based on the weight of the magnetic powder.

    摘要翻译： 一种具有非磁性载体和形成在载体的至少一个表面上并含有磁性粉末和粘合剂的磁性层的磁记录介质，其中磁粉至少包含铁和氮作为构成元素， 具有球形或椭球形颗粒形状，平均粒度为5〜50nm，磁性层含有0.01〜20重量％的含硅的 基于磁粉的重量的化合物。

    MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING CASSETTE
    5.
    发明申请
    MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING CASSETTE 失效
    磁记录介质和磁记录卡

    公开(公告)号：US20070159722A1

    公开(公告)日：2007-07-12

    申请号：US11688179

    申请日：2007-03-19

    申请人： Sadamu KUSE ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    发明人： Sadamu KUSE ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    IPC分类号： G11B5/78 ,  G11B5/584 ,  G11B5/708

    CPC分类号： B82Y25/00 ,  G11B5/584 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/70621 ,  G11B5/712 ,  G11B5/714 ,  G11B5/716 ,  G11B5/735 ,  G11B5/738 ,  G11B5/78 ,  G11B23/107 ,  H01F1/0054 ,  H01F1/0551 ,  H01F1/059 ,  Y10T428/1107 ,  Y10T428/2991

    摘要： A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, comprising a non-magnetic powder and a binder resin, at least one magnetic layer formed on the primer layer, comprising a magnetic powder and a binder resin, and a back layer formed on the other surface of the non-magnetic support, wherein the magnetic powder contained in the uppermost layer of the magnetic layer is a rare earth metal-iron type magnetic powder of substantially spherical or ellipsoidal particles comprising a rare earth element and iron or a transition metal which comprises iron, and has a number average particle size of 5 to 50 nm and an average axis ratio of 1 to 2, and the total thickness of the magnetic recording medium is less than 6 μm. This magnetic recording medium can achieve an excellent block error rate, which cannot be realized with magnetic recording media comprising conventional acicular magnetic powders.

    摘要翻译： 一种包含非磁性载体的磁记录介质，至少一个形成在所述非磁性载体的一个表面上的底层，包含非磁性粉末和粘合剂树脂，所述至少一个磁性层形成在所述底漆层上，包括 磁性粉末和粘合剂树脂，以及形成在非磁性载体的另一个表面上的背层，其中包含在磁性层的最上层中的磁粉是基本上为球形的稀土金属 - 铁型磁性粉末 或包含稀土元素和铁的过渡金属的椭圆体颗粒或包含铁的过渡金属，并且其数均粒径为5〜50nm，平均轴比为1〜2，磁记录介质的总厚度为 少于6个妈妈。 该磁记录介质可以实现优异的块错误率，这是由包含传统针状磁粉的磁记录介质所不能实现的。

    MAGNETIC TAPE AND MAGNETIC TAPE CARTRIDGE
    6.
    发明申请
    MAGNETIC TAPE AND MAGNETIC TAPE CARTRIDGE 审中-公开
    磁带和磁带盒

    公开(公告)号：US20080107921A1

    公开(公告)日：2008-05-08

    申请号：US11766491

    申请日：2007-06-21

    申请人： Sadamu Kuse ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    发明人： Sadamu Kuse ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    IPC分类号： G11B5/39 ,  G11B5/62

    CPC分类号： B82Y25/00 ,  G11B5/584 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/70621 ,  G11B5/712 ,  G11B5/714 ,  G11B5/716 ,  G11B5/73 ,  G11B5/735 ,  G11B5/78 ,  G11B23/107 ,  H01F1/0054 ,  H01F1/0551 ,  H01F1/059 ,  Y10T428/1107 ,  Y10T428/2991

    摘要： A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the non-magnetic support and the lower magnetic layer; at least one non-magnetic intermediate layer containing non-magnetic powder and a binder resin, which is formed on the lower magnetic layer; at least one upper magnetic layer containing magnetic powder and a binder resin, which is formed on the non-magnetic intermediate layer; and a back layer which is formed on the other side of the non-magnetic support, characterized in that the magnetic powder contained in the uppermost magnetic layer of the upper magnetic layer is iron type magnetic powder which comprises substantially spherical or ellipsoidal particles with a number-average particle diameter of 5 to 50 nm and an average axial ratio of 1 to 2, each of said particles containing iron or containing iron as a main component and a transition element; and that the total thickness of the magnetic recording medium is 6 μm or less. This magnetic recording medium has electromagnetic conversion, characteristics which cannot be achieved by any of conventional magnetic recording media, and also is expected to have excellent magnetic serve characteristics.

    摘要翻译： 一种磁记录介质，包括非磁性载体; 至少一个含有磁性粉末和粘合剂树脂的下磁性层，其形成在非磁性载体的一侧上，该非磁性载体具有或不具有介于非磁性载体和下部磁性层之间的非磁性底漆层; 至少一个含有非磁性粉末和粘结剂树脂的非磁性中间层，形成在下部磁性层上; 至少一个含有磁性粉末和粘结剂树脂的上磁性层，形成在非磁性中间层上; 以及形成在所述非磁性载体的另一侧的背层，其特征在于，包含在所述上磁性层的最上层磁性层中的磁性粉末是铁型磁粉，其包含基本上具有数量的球形或椭圆形颗粒 平均粒径为5〜50nm，平均轴比为1〜2，所述粒子含有铁或以铁为主要成分，过渡元素为主成分。 并且磁记录介质的总厚度为6μm或更小。 这种磁记录介质具有电磁转换特性，这些特性通过任何常规的磁记录介质都不能实现，并且预期具有优异的磁性能特性。

    Magnetic tape and magnetic tape cartridge
    9.
    发明授权
    Magnetic tape and magnetic tape cartridge 有权
    磁带和磁带盒

    公开(公告)号：US07267896B2

    公开(公告)日：2007-09-11

    申请号：US10389880

    申请日：2003-03-18

    申请人： Sadamu Kuse ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    发明人： Sadamu Kuse ,  Tsugihiro Doi ,  Tetsutaro Inoue ,  Mikio Kishimoto ,  Yuji Sasaki ,  Hideaki Watanabe

    IPC分类号： G11B5/706

    CPC分类号： B82Y25/00 ,  G11B5/584 ,  G11B5/70 ,  G11B5/70615 ,  G11B5/70621 ,  G11B5/712 ,  G11B5/714 ,  G11B5/716 ,  G11B5/735 ,  G11B5/738 ,  G11B5/78 ,  G11B23/107 ,  H01F1/0054 ,  H01F1/0551 ,  H01F1/059 ,  Y10T428/1107 ,  Y10T428/2991

    摘要： A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the non-magnetic support and the lower magnetic layer; at least one non-magnetic intermediate layer containing non-magnetic powder and a binder resin, which is formed on the lower magnetic layer; at least one upper magnetic layer containing magnetic powder and a binder resin, which is formed on the non-magnetic intermediate layer; and a back layer which is formed on the other side of the non-magnetic support, characterized in that the magnetic powder contained in the uppermost magnetic layer of the upper magnetic layer is iron type magnetic powder which comprises substantially spherical or ellipsoidal particles with a number-average particle diameter of 5 to 50 nm and an average axial ratio of 1 to 2, each of said particles containing iron or containing iron as a main component and a transition element; and that the total thickness of the magnetic recording medium is 6 μm or less. This magnetic recording medium has electromagnetic conversion characteristics which cannot be achieved by any of conventional magnetic recording media, and also is expected to have excellent magnetic serve characteristics.

    摘要翻译： 一种磁记录介质，包括非磁性载体; 至少一个含有磁性粉末和粘合剂树脂的下磁性层，其形成在非磁性载体的一侧上，该非磁性载体具有或不具有介于非磁性载体和下部磁性层之间的非磁性底漆层; 至少一个含有非磁性粉末和粘结剂树脂的非磁性中间层，形成在下部磁性层上; 至少一个含有磁性粉末和粘结剂树脂的上磁性层，形成在非磁性中间层上; 以及形成在所述非磁性载体的另一侧的背层，其特征在于，包含在所述上磁性层的最上层磁性层中的磁性粉末是铁型磁粉，其包含基本上具有数量的球形或椭圆形颗粒 平均粒径为5〜50nm，平均轴比为1〜2，所述粒子含有铁或以铁为主要成分，过渡元素为主成分。 并且磁记录介质的总厚度为6μm或更小。 该磁记录介质具有通过任何常规磁记录介质无法实现的电磁转换特性，并且预期具有优异的磁性能特性。