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53 条记录 (耗时 0.03 秒)

    Method for making a magnetic recording medium
    2.
    发明授权
    Method for making a magnetic recording medium 失效
    制造磁记录介质的方法

    公开(公告)号：US5202149A

    公开(公告)日：1993-04-13

    申请号：US892478

    申请日：1992-06-02

    申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazuyoshi Honda ,  Yasuhiro Kawawake ,  Yoshiki Goto

    发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Kazuyoshi Honda ,  Yasuhiro Kawawake ,  Yoshiki Goto

    IPC分类号： G11B5/66 ,  G11B5/84 ,  G11B5/85

    CPC分类号： G11B5/66 ,  G11B5/84 ,  G11B5/85 ,  Y10S428/90 ,  Y10S428/928

    摘要： In the method for making the magnetic recording wherein a first magnetic layer is formed on a substrate and a second magnetic layer is formed on the first magnetic layer, before forming the second magnetic layer, accelerated ions are irradiated onto a surface of the first magnetic layer. Thereby, naturally formed oxidized layer and adhered impurity on the first magnetic layer are removed from the surface of the first magnetic layer by ion etching action by the irradiation of ions, and hence a preferable condition of an interface between the first magnetic layer and subsequently formed second magnetic layer is obtained.

    摘要翻译： 在形成第一磁性层的第一磁性层上形成第一磁性层并在第一磁性层上形成第二磁性层的磁记录方法中，在形成第二磁性层之前，将加速的离子照射到第一磁性层的表面上 。 由此，通过离子的照射离子蚀刻作用，从第一磁性层的表面除去天然形成的氧化层和附着在第一磁性层上的杂质，因此优选的是在第一磁性层之间形成的界面 获得第二磁性层。

    Method of producing thin film
    3.
    发明授权
    Method of producing thin film 失效
    生产薄膜的方法

    公开(公告)号：US5087476A

    公开(公告)日：1992-02-11

    申请号：US487273

    申请日：1990-03-02

    申请人： Kiyokazu Tohma ,  Ryuji Sugita ,  Kazuyoshi Honda ,  Yasuhiro Kawawake ,  Tatsuaki Ishida

    发明人： Kiyokazu Tohma ,  Ryuji Sugita ,  Kazuyoshi Honda ,  Yasuhiro Kawawake ,  Tatsuaki Ishida

    IPC分类号： B29C35/08 ,  B29C59/16 ,  C23C14/02 ,  C23C14/20

    CPC分类号： C23C14/20 ,  B29C59/16 ,  C23C14/022 ,  B29C2035/0872 ,  B29C2035/0877

    摘要： The method includes applying ions and electrons from an ion gun onto a polymer film while the polymer film is traveling circumferentially along a peripheral surface of a cylindrical can from a supply location to a take-up location of the polymer film relative to the cylindrical drum. The ions and electrons from the ion gun are applied onto a part of the polymer film while it is moving through a position near the supply location of the polymer film relative to the drum at which the polymer film begins to contact the outer peripheral surface of the drum. At a downstream location relative to the drum, electrons are applied from an electron gun onto the polymer film traveling on the drum surface. At a further downstream location relative to the drum, the thin film is deposited, e.g., by vacuum evaporation, on the polymer film travelling on the drum. This method enables a thin film, having no wrinkles and with a high adhesion strength with respect to the polymer film, to be produced in a stable manner.

    Magnetic recording medium and method for producing the same
    7.
    发明授权
    Magnetic recording medium and method for producing the same 失效
    磁记录介质及其制造方法

    公开(公告)号：US5554440A

    公开(公告)日：1996-09-10

    申请号：US118326

    申请日：1993-09-09

    申请人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Yasuaki Ban

    发明人： Tatsuaki Ishida ,  Ryuji Sugita ,  Kiyokazu Tohma ,  Yasuaki Ban

    IPC分类号： G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  G11B5/85 ,  H01F1/11 ,  G11B5/70

    CPC分类号： G11B5/656 ,  G11B5/66 ,  G11B5/85 ,  Y10S428/90 ,  Y10T428/265

    摘要： A magnetic tape having a polymer substrate and a magnetic layer which is formed directly on a surface of the substrate or on a primer layer formed on the substrate and contains cobalt, oxygen and optionally nickel, in which a coercive force is at least 120 kA/m and a squareness ratio is at least 0.9 in a hysteresis loop which is obtained when a magnetic field is applied in a plane of the magnetic layer in a longitudinal direction of the magnetic tape, and on the hysteresis loop, an intensity of the applied magnetic field, at which a magnetization when the applied magnetic field is increased is 99% of the magnetization when the applied magnetic field is decreased, is not larger than 400 kA/m, and preferably, a ratio of a value of magnetization at an intersection between a tangential line drawn at a point which gives a residual magnetization at the applied magnetic field of 0 (zero) and a tangential line drawn at a point which gives a coercive force with a magnetization of 0 in a second quadrant to said residual magnetization is at least 0.9, which magnetic tape has improved high density recording/reproducing properties.

    摘要翻译： 一种具有聚合物基材和磁性层的磁带，其直接形成在基材的表面上或形成在基材上的底漆层上，并且含有钴，氧和任选的镍，矫顽力为至少120kA / m，当在磁带的纵向方向上的磁性层的平面中施加磁场时，在磁滞回线中，矩形比至少为0.9，在磁滞回线上，所施加的磁体的强度 当所施加的磁场增加时的磁化强度是施加的磁场减小时的磁化强度的99％，不大于400kA / m，优选地，在相交处的磁化强度的比值 在施加的磁场为0（零）的点处绘制的切线，以及在第二次给出磁化强度为0的矫顽力的点处画出的切线 所述残余磁化强度的象限至少为0.9，该磁带具有改善的高密度记录/再现特性。

    Method and apparatus for producing magnetic recording medium
    10.
    发明授权
    Method and apparatus for producing magnetic recording medium 失效
    制造磁记录介质的方法和装置

    公开(公告)号：US5472506A

    公开(公告)日：1995-12-05

    申请号：US367998

    申请日：1995-01-03

    申请人： Kiyokazu Tohma ,  Ryuji Sugita ,  Tatsuaki Ishida ,  Yasuaki Ban

    发明人： Kiyokazu Tohma ,  Ryuji Sugita ,  Tatsuaki Ishida ,  Yasuaki Ban

    IPC分类号： G11B5/85 ,  C23C14/00

    CPC分类号： G11B5/85

    摘要： A magnetic recording medium having good high density recording characteristics is produced by forming a magnetic layer on a substrate which is traveling around a peripheral surface of a cylindrical can by an oblique vapor deposition method to form a magnetic layer comprising cobalt, an axis of easy magnetization of which inclined from a line normal to the layer plane. A residual gas pressure in an initial region of the formation of the magnetic layer is kept as low as possible, in particular, the residual gas pressure in the initial region of the formation of the magnetic layer is lower than in the other part of the production apparatus.

    摘要翻译： 具有良好高密度记录特性的磁记录介质通过在通过倾斜气相沉积法绕圆筒形罐的周面行进的基板上形成磁性层来形成包含钴的磁性层，易磁化轴 其从垂直于层平面的线倾斜。 形成磁性层的初始区域中的残留气体压力尽可能地保持低，特别是形成磁性层的初始区域中的残余气体压力低于制造的其它部分 仪器。