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1.发明授权公开(公告)号：US06850377B2
公开(公告)日：2005-02-01
申请号：US10123417
申请日：2002-04-17
申请人： Hideyuki Hashi , Taizou Hamada , Tatsuaki Ishida
发明人： Hideyuki Hashi , Taizou Hamada , Tatsuaki Ishida
CPC分类号： G01R33/1207 , G11B5/865 , G11B23/505 , G11B27/36 , G11B33/10 , G11B2220/20
摘要： Instead of directly performing defect inspection using a master information carrier, an inspection substrate is prepared to then bring the master information carrier in close contact therewith, to thereby transfer a defect on the master information carrier to the inspection substrate, thus indirectly inspecting any defect of the master information carrier on the inspection substrate. Defect inspection is performed on the first-state inspection substrate before close contacting, so that a defect inspection result on the second-state inspection substrate after close contacting and that on the first-state inspection substrate are compared to each other.
摘要翻译： 代替使用主信息载体直接执行缺陷检查，准备检查基板，使主信息载体紧密接触，从而将主信息载体上的缺陷传送到检查基板，从而间接地检查 检测基板上的主信息载体。 在紧密接触之前对第一状态检查基板进行缺陷检查，从而将紧密接触后的第二状态检查基板与第一状态检查基板上的缺陷检查结果进行比较。
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公开(公告)号：US06714367B1
公开(公告)日：2004-03-30
申请号：US09555583
申请日：2000-08-07
IPC分类号： G11B586
摘要： A master information carrier has a shape pattern corresponding to an information signal array to be recorded on a magnetic recording medium, and the shape pattern is provided by arraying a ferromagnetic thin film deposited on a nonmagnetic substrate surface. The ferromagnetic thin film is either a soft magnetic film or semihard magnetic film having not more than 40 kA/m coercive force in track length direction of the information signals, and residual magnetization of the ferromagnetic thin film in the track length direction of the information signals is greater than coercive force of the magnetic recording medium. As a result, a master information carrier with superior magnetic recording performance can be obtained.
摘要翻译： 主信息载体具有对应于要记录在磁记录介质上的信息信号阵列的形状图案，并且通过排列沉积在非磁性基板表面上的铁磁性薄膜来提供形状图案。 铁磁性薄膜是在信息信号的轨道长度方向上具有不超过40kA / m矫顽力的软磁性膜或半硬磁性薄膜，以及信息信号的磁道长度方向上的铁磁性薄膜的剩余磁化 大于磁记录介质的矫顽力。 结果，可以获得具有优良磁记录性能的主信息载体。
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公开(公告)号：US06646820B1
公开(公告)日：2003-11-11
申请号：US09869947
申请日：2001-07-03
申请人： Tatsuaki Ishida , Taizou Hamada , Hideyuki Hashi , Keizo Miyata , Yasuaki Ban , Hiromi Kita
发明人： Tatsuaki Ishida , Taizou Hamada , Hideyuki Hashi , Keizo Miyata , Yasuaki Ban , Hiromi Kita
IPC分类号： G11B586
摘要： A master information carrier (2) with an arranged pattern formed of a ferromagnetic film in a shape corresponding to information signals is superposed on a magnetic recording medium (1) and the arranged pattern formed of a ferromagnetic film is magnetized with a magnetizing head (6), thus transfer-recording the arranged pattern into the magnetic recording medium as a magnetized pattern. The magnetizing head includes an annular magnetic circuit with a gap, and a strength of a magnetic field applied to the master information carrier by magnetic flux leaking from portions other than the gap is set to be 20% or less of that of a magnetic field applied to the master information carrier by magnetic flux leaking from the gap. Quality deterioration due to various conditions during recording can be prevented and uniform recording with less variation depending on position on the magnetic recording medium is achieved.
摘要翻译： 具有与信息信号相对应的铁磁膜形成的排列图案的主信息载体（2）叠加在磁记录介质（1）上，由铁磁膜形成的排列图案被磁化头（6 ），从而将布置的图案作为磁化图案转印记录到磁记录介质中。 磁化头包括具有间隙的环形磁路，并且通过从除了间隙之外的部分泄漏的磁通量施加到主信息载体的磁场强度设定为施加的磁场的磁场强度的20％以下 通过磁通从主信息载体泄漏出来。 可以防止由记录期间的各种条件导致的质量劣化，并且实现根据磁记录介质上的位置具有较小变化的均匀记录。
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公开(公告)号：US06567227B2
公开(公告)日：2003-05-20
申请号：US10108029
申请日：2002-03-26
申请人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata , Hiroshi Ryonai
发明人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata , Hiroshi Ryonai
IPC分类号： G11B586
CPC分类号： G11B5/64 , G11B5/59638 , G11B5/59655 , G11B5/855 , G11B5/865
摘要： A master information carrier comprises a substrate whose surface has an embossed pattern corresponding to an information signal. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. A method for writing an information signal into a sheet or disk magnetic record medium with a ferromagnetic thin film or coating is performed by putting the surface of the magnetic record medium into contact with the master information carrier so as to write a magnetized pattern corresponding to the embossed pattern of the master information carrier into the magnetic record medium.
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5.发明授权Continuous fabrication of thin film magnetic recording medium with vacuum deposition 失效连续制造具有真空沉积的薄膜磁记录介质
公开(公告)号：US5679410A
公开(公告)日：1997-10-21
申请号：US462690
申请日：1995-06-05
CPC分类号： G11B5/85 , C23C14/22 , C23C14/562
摘要： A thin film magnetic recording medium is manufactured with vacuum deposition or sputtering technique. One or more reflectors are provided between the substrate and an evaporation source around a path through which evaporated atoms travel onto a substrate. When a thin film is deposited on a substrate, the one or more reflectors are heated above a melting point of an evaporation material to reflect evaporated atoms arriving them. Thus, atoms reflected by the one or more reflectors also contribute to deposition of a thin film as well as evaporated atoms arriving directly from the evaporation source, and deposition efficiency is improved. Such a reflector is also used to limit a boundary or the path through which evaporated atoms travel onto a substrate. Then, a range of incident angles of evaporated atoms onto the substrate is kept the same for a long time on deposition, and characteristics of the thin film are stable.
摘要翻译： 使用真空沉积或溅射技术制造薄膜磁记录介质。 一个或多个反射器设置在基板和蒸发源之间的周围的蒸发原子行进到基板上的路径。 当薄膜沉积在基底上时，将一个或多个反射器加热到蒸发材料的熔点之上，以反射到达它们的蒸发原子。 因此，由一个或多个反射器反射的原子也有助于沉积薄膜以及从蒸发源直接到达的蒸发原子，并且提高了沉积效率。 这样的反射器也用于限制蒸发的原子通过其移动到衬底上的边界或路径。 然后，蒸镀原子在基板上的入射角度的范围在沉积时长时间保持相同，并且薄膜的特性是稳定的。
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6.发明授权Magnetic recording medium having a ferromagnetic thin film in which 70% to 90% of the total magnetic particles have residual magnetization vectors within .+-.10.degree. of the easy axis direction 失效具有铁磁薄膜的磁记录介质，其中70％至90％的总磁性颗粒在易轴方向的+/- 10°内具有残余磁化矢量
公开(公告)号：US5569523A
公开(公告)日：1996-10-29
申请号：US395818
申请日：1995-02-28
CPC分类号： G11B5/656 , G11B5/64 , G11B5/84 , G11B5/85 , Y10S428/90 , Y10T428/2495 , Y10T428/265
摘要： A magnetic recording medium fabrication device includes a cooling drum around which a substrate runs while being cooled thereby, an ion gun arranged upstream to a vapor deposition station for kicking out particles absorbed on the plane of the substrate, a cooling body arranged between the cooling drum and ion gun for absorbing kicked out particles and a vapor deposition means for depositing a magnetic layer on the substrate at the vapor deposition station. The magnetic particles forming the magnetic layer that have residual magnetization vectors within .+-.10.degree. of the easy axis direction including the magnetic anisotropy of the medium are greater than or equal to 70% and less than or equal to 90% of the total amount of magnetic particles.
摘要翻译： 一种磁记录介质制造装置，包括：冷却滚筒，基板在该冷却滚筒的同时冷却，在该冷却滚筒的同时被冷却;离子枪，布置在气相沉积站的上游，用于汲取在基板的平面上吸收的颗粒;冷却体， 用于吸收被剔除的颗粒的离子枪和用于在气相沉积站上在基底上沉积磁性层的气相沉积装置。 形成磁性层的磁性粒子在容易轴方向的+/- 10°以内的残留磁化强度包括介质的磁各向异性大于或等于总量的70％且小于或等于90％ 的磁性颗粒。
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公开(公告)号：US5427869A
公开(公告)日：1995-06-27
申请号：US103759
申请日：1993-08-10
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
CPC分类号： G11B5/65 , G11B5/656 , G11B5/85 , Y10S428/90
摘要： A magnetic recording medium includes a nonmagnetic substrate and a magnetic layer which is formed on a surface of the substrate and which has an axis of easy magnetization inclined from a direction to normal plane of the layer. An angular dependency of coercive force, of the medium which is measured by changing an application angle of a magnetic field in a range relative to -90.degree. to +90.degree. from the plane of the layer with a plane normal to the layer and including the axis of easy magnetization, has two local maximum values and two local minimum values. A ratio of the local maximum value closer to a plane direction to the minimum value closer of the layer to the local plane direction of the layer is from 1.6 to 2.4, and the local maximum value closer to the plane direction of the layer is larger than the local maximum value closer to the line normal to of the plane of the layer. The medium has a high S/N ratio.
摘要翻译： 磁记录介质包括非磁性基板和磁性层，该磁性层形成在基板的表面上，并且具有从层的方向到法线平面的易磁化轴。 介质的矫顽力的角度依赖性，其通过将具有与该层垂直的平面相对于-90°至+90°的范围内的磁场的施加角度改变而测量，并且包括 轴易于磁化，具有两个局部最大值和两个局部最小值。 局部最大值比平面方向的距离越接近层的距离越靠近层的局部平面方向的最小值的比值为1.6到2.4，并且更靠近层的平面方向的局部最大值大于 局部最大值越接近层的平面垂直线。 介质具有较高的S / N比。
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公开(公告)号：US5298282A
公开(公告)日：1994-03-29
申请号：US93748
申请日：1993-07-20
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida
摘要： A method for producing a magnetic recording medium having a magnetic layer having a two-layered structure positioned on a substrate, which includes forming the magnetic layer on the substrate by a vacuum deposition process during the travel of the substrate on a cylindrical can, wherein a first evaporation source and a second evaporation source are positioned on the same side of a vertical line passing across a longitudinal axis of the cylindrical can while confronting the cylindrical can, a shield plate having a first opening and a second opening is positioned between the cylindrical can and the first and second evaporation sources, each of vapors evaporated from the first and second evaporation sources passes through the first and second openings, respectively, a distance between the vertical line passing across the longitudinal axis of the cylindrical can and a center of an evaporation part of the first evaporation source is longer than a radius of the cylindrical can, and a distance between the vertical line passing across the longitudinal axis of the cylindrical can and a center of an evaporation part of the second evaporation source is shorter than a radius of the cylindrical can.
摘要翻译： 一种制造具有位于基板上的具有两层结构的磁性层的磁记录介质的方法，该方法包括在基板在圆筒形罐上行进期间通过真空沉积工艺在基板上形成磁性层，其中a 第一蒸发源和第二蒸发源位于与圆柱形罐的纵向轴线相对的垂直线的同一侧上，同时面对圆筒形罐，具有第一开口和第二开口的屏蔽板位于圆柱形罐 以及第一和第二蒸发源，从第一和第二蒸发源蒸发的每个蒸气分别穿过第一和第二开口，穿过圆筒形罐的纵向轴线的垂直线与蒸发中心之间的距离 第一蒸发源的一部分比圆筒形罐的半径长，并且距离更远 穿过圆柱形罐的纵向轴线的垂直线与第二蒸发源的蒸发部分的中心之间的距离e比圆筒形罐的半径短。
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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
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。
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公开(公告)号：US5087476A
公开(公告)日：1992-02-11
申请号：US487273
申请日：1990-03-02
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.
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