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    Method for magnetically recording digital video signals with specified ranges of the easy axis and the bias magnetic field
    2.
    发明授权
    Method for magnetically recording digital video signals with specified ranges of the easy axis and the bias magnetic field 失效
    磁性记录数字视频信号的方法，具有易于轴和偏置磁场的指定范围

    公开(公告)号：US5247397A

    公开(公告)日：1993-09-21

    申请号：US781578

    申请日：1991-10-23

    申请人： Kenichi Sato ,  Kazunobu Chiba ,  Yuichi Arisaka ,  Toshiharu Kobayashi ,  Yukari Yamada

    发明人： Kenichi Sato ,  Kazunobu Chiba ,  Yuichi Arisaka ,  Toshiharu Kobayashi ,  Yukari Yamada

    IPC分类号： G11B5/09 ,  G11B5/86 ,  H04N5/926

    CPC分类号： G11B5/865 ,  G11B5/09 ,  H04N5/9261

    摘要： A magnetic recording transfer method for use with the combination of a mother magnetic recording medium and a copy magnetic recording medium of a metal-deposited thin film type each. The two media are overlaid so that the column inclination of one medium will be opposite in direction to that of the other medium. This method comprises the step of externally applying a biased magnetic field to the combination of the media in such a manner that magnetized recordings on the mother medium will be transferred to the copy medium. The easy axis of the mother medium is positioned at an angle of 20.degree..+-.15.degree. with respect to the in-plane direction of the medium. The biased magnetic field is applied to the mother medium at an angle of 110.degree..+-.15.degree. with respect to the in-plane direction of the medium. This makes it possible to enhance the efficiency in transferring magnetic recording of the mother medium, especially the recordings of short wave lengths, and to minimize demagnetization of the mother medium. Furthermore, the ratio of the coercive force H.sub.CM of the mother medium to the coercive force H.sub.CC of the copy medium (H.sub. CM /H.sub.CC) is set to at most 1.5. This improves the magnetic recording transfer output of the copy medium and boosts the efficiency in the magnetic transfer of short wave magnetic recordings.

    摘要翻译： 一种磁记录转印方法，其用于母体磁记录介质和金属沉积薄膜型的复制磁记录介质的组合。 两个介质被重叠，使得一个介质的列倾角将与其它介质的方向相反。 该方法包括以下步骤：将偏置的磁场施加到介质的组合，使得母介质上的磁化记录将被传送到复制介质。 母介质的容易轴相对于介质的面内方向以20°±15°的角度定位。 将偏置磁场相对于介质的面内方向以110°±15°的角度施加到母介质。 这使得可以提高转印母介质的磁记录的效率，特别是短波长的记录，并且使母介质的退磁最小化。 此外，母介质的矫顽力HCM与复印介质的矫顽力HCC的比例（H CM / HCC）设定为1.5以下。 这改善了复印介质的磁记录传送输出，提高了短波磁记录磁传输的效率。

    Method of producing magnetic recording medium
    3.
    发明授权
    Method of producing magnetic recording medium 失效
    制造磁记录介质的方法

    公开(公告)号：US06773745B2

    公开(公告)日：2004-08-10

    申请号：US10219020

    申请日：2002-08-14

    申请人： Yuichi Arisaka ,  Junichi Tachibana ,  Takuya Ito ,  Yoh Iwasaki

    发明人： Yuichi Arisaka ,  Junichi Tachibana ,  Takuya Ito ,  Yoh Iwasaki

    IPC分类号： B05D512

    CPC分类号： G11B5/855 ,  G11B5/85

    摘要： A method of producing a magnetic recording medium comprising the step of forming a magnetic layer on a non-magnetic base film running at a constant speed by continuous oblique evaporation depositing metal vapor of volatilized metal incident obliquely to a surface of the non-magnetic base film, wherein the evaporation is conducted at a film forming rate, defined as an average deposition rate of the magnetic layer at a part of the non-magnetic base film exposed to the incident metal vapor, of not less than a predetermined rate to form an internal microstructure of the magnetic layer comprising columns each having a diameter of not more than about 15 nm constituted by magnetic particles having a size of not more than about 10 nm connected in chains in a direction substantially perpendicular to the magnetic layer and non-magnetic particles packed between the columns and separating the columns from each other, and a magnetic recording medium produced by the above method.

    摘要翻译： 一种制造磁记录介质的方法，包括以下步骤：在通过连续倾斜蒸发沉积非挥发性金属的非磁性基膜上形成磁性层的步骤，该金属蒸气倾斜地入射到非磁性基膜的表面 其中蒸发以成膜速度进行，其定义为暴露于入射金属蒸气的非磁性基底膜的一部分处的磁性层的平均沉积速率不小于预定速率，以形成内部 磁性层的微观结构包括各自具有不大于约15nm的直径的柱，所述柱由不大于约10nm的尺寸的磁性颗粒构成，所述磁性颗粒在基本上垂直于磁性层的方向上以链状连接，并且包含非磁性颗粒 在列之间和彼此分离列，以及通过上述方法制造的磁记录介质。

    Magnetic recording medium
    4.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US06203884B1

    公开(公告)日：2001-03-20

    申请号：US09211003

    申请日：1998-12-15

    申请人： Satoshi Sato ,  Shinichi Matsumura ,  Yuichi Arisaka

    发明人： Satoshi Sato ,  Shinichi Matsumura ,  Yuichi Arisaka

    IPC分类号： G11B5733

    CPC分类号： G11B5/7315 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/31725

    摘要： The present invention provides a metal thin film type magnetic recording medium including a non-magnetic substrate made from a polyamide film whose surface configuration is controlled so as to obtain an optimal fine configuration of a magnetic layer surface, enabling to simultaneously obtain a preferable electro-magnetic conversion characteristic and preferable running characteristic. The non-magnetic substrate is made from an aromatic polyamide film formed in such a manner that fine protrusions having an average height of 5 to 50 nm are formed in a range of 103 to 105 thousand pieces/mm2 on a surface where a ferromagnetic metal thin film is to be formed.

    摘要翻译： 本发明提供一种金属薄膜型磁记录介质，其包括由聚酰胺薄膜制成的非磁性基材，其表面形状被控制以获得磁性层表面的最佳精细构型，能够同时获得优选的电 - 磁转换特性和优选的行走特性。非磁性基材由芳族聚酰胺薄膜制成，其形成方式是使平均高度为5〜50nm的微细突起形成在103〜105000张/ mm 2的范围内 在要形成铁磁金属薄膜的表面上。

    Magnetic recording medium with columar magnetic layer
    8.
    发明授权
    Magnetic recording medium with columar magnetic layer 失效
    带有磁性层的磁记录介质

    公开(公告)号：US07241519B2

    公开(公告)日：2007-07-10

    申请号：US10885185

    申请日：2004-07-06

    申请人： Junichi Tachibana ,  Yuichi Arisaka ,  Hiroshi Mizuno ,  Takuya Ito

    发明人： Junichi Tachibana ,  Yuichi Arisaka ,  Hiroshi Mizuno ,  Takuya Ito

    IPC分类号： G11B5/65 ,  G11B5/68 ,  G11B5/714

    CPC分类号： G11B5/855 ,  G11B5/64 ,  Y10T428/265

    摘要： Provided is a magnetic recording medium capable of achieving higher density recording. The magnetic recording medium comprises a magnetic layer formed on a non-magnetic base through vacuum oblique evaporation. The magnetic layer includes a plurality of columns in which 3 to 7 ferromagnetic particles with an average diameter of 5 to 10 nm are arranged in a line, and non-magnetic particles are disposed between columns so as to separate the columns from one another. A value Y/X defined as a ratio of an average value Y of a distance between the centers of adjacent columns in a film in-plane direction to an average value X of a distance between the centers of adjacent columns in a film thickness direction is preferably 0.5 or more.

    摘要翻译： 提供了能够实现更高密度记录的磁记录介质。 磁记录介质包括通过真空倾斜蒸发在非磁性基底上形成的磁性层。 磁性层包括多个列，其中平均直径为5至10nm的3至7个铁磁性颗粒被布置成一行，并且非磁性颗粒设置在列之间，以便将柱彼此分离。 定义为膜平面方向上的相邻列的中心之间的距离的平均值Y与膜厚度方向上的相邻列的中心之间的距离的平均值X的比值Y / X是 优选为0.5以上。

    Magnetic recording medium
    9.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号：US5906880A

    公开(公告)日：1999-05-25

    申请号：US637562

    申请日：1996-04-25

    申请人： Kazunobu Chiba ,  Kenichi Sato ,  Yuichi Arisaka ,  Yukari Yamada

    发明人： Kazunobu Chiba ,  Kenichi Sato ,  Yuichi Arisaka ,  Yukari Yamada

    IPC分类号： G11B5/64 ,  G11B5/66

    CPC分类号： G11B5/66 ,  G11B5/64 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/24975 ,  Y10T428/265

    摘要： A magnetic recording medium, comprising a nonmagnetic substrate on the surface of which is deposited a magnetic layer. In one embodiment, the magnetic layer is formed of two thin films of magnetic metal and a layer of nonmagnetic material sandwiched therebetween, the layer of nonmagnetic material having a thickness no greater than 20% of the thickness of the magnetic layer, with the magnetic layer having an energy product of at least 100 gauss.multidot.cm.multidot.Oe as the product of its residual magnetic flux density, thickness and coercive force, and a surface roughness no greater than 0.003 .mu.m in center line average height. In another embodiment, the magnetic layer, which may be a single layer of magnetic metal film or may be of the aforementioned multiple layer construction, is vacuum deposited onto the substrate at an incident angle in the range of 30.degree. to 70.degree..

    摘要翻译： 一种磁记录介质，包括在其表面上沉积磁性层的非磁性基底。 在一个实施例中，磁性层由两个磁性金属薄膜和夹在其间的非磁性材料层形成，非磁性材料层的厚度不大于磁性层厚度的20％，磁性层 具有至少100高斯xcm×oe的能量乘积作为其剩余磁通密度，厚度和矫顽力的乘积，以及中心线平均高度不大于0.003μm的表面粗糙度。 在另一个实施例中，可以是单层磁性金属膜或可以具有上述多层结构的磁性层以30°至70°的入射角真空沉积到基底上。