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11. 发明授权

US5665460A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5665460A
公开(公告)日：1997-09-09
申请号：US548422
申请日：1995-10-26
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Kazunari Yoshimoto
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Kazunari Yoshimoto
IPC分类号： G11B5/64 , G11B5/65 , G11B5/66
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/24942 , Y10T428/265
摘要： A magnetic recording medium having a first magnetic layer positioned on a substrate and a second magnetic layer positioned on the first magnetic layer, wherein the first magnetic layer is a film of a partial oxide based on Co in which a growth direction of crystalline grain is substantially normal to the film plane and the easy magnetization axis is in a direction of the film plane or direction substantially normal to the film plane, and the second magnetic layer is a film of a partial oxide based on Co in which the growth direction of crystalline grain is diagonally inclined to the line normal to the film plane and the easy magnetization axis is diagonally inclined to the line normal to the film plane.
摘要翻译：一种具有位于基板上的第一磁性层和位于第一磁性层上的第二磁性层的磁记录介质，其中第一磁性层是基于Co的部分氧化物的膜，其中晶粒的生长方向基本上是垂直于膜平面和容易磁化轴的方向是沿着基本上垂直于膜平面的膜平面或方向，并且第二磁性层是基于Co的部分氧化物的膜，其中晶粒的生长方向对角地倾斜于垂直于膜平面的线，并且容易的磁化轴与垂直于膜平面的线对角倾斜。

12. 发明授权

US5549936A Manufacturing method of magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US5549936A
公开(公告)日：1996-08-27
申请号：US325125
申请日：1994-10-18
申请人： Kiyokazu Tohma , Kazunari Yoshimoto , Ryuji Sugita , Tatsuaki Ishida
发明人： Kiyokazu Tohma , Kazunari Yoshimoto , Ryuji Sugita , Tatsuaki Ishida
IPC分类号： G11B5/85 , B05D3/06
CPC分类号： G11B5/85
摘要： In a manufacturing method of a magnetic recording medium with a vacuum deposition, two shielding members are provided above a substrate for defining an aperture. An evaporation source is located at a position wherein evaporated atoms from an evaporation material can adhere to a moving substrate through the aperture. The substrate is moved while a material in the evaporation source is irradiated at two evaporation portions with two electron beams along a moving direction of the substrate to form a magnetic layer. Thus, curving of columnar gains formed in the magnetic layer is suppressed or crystal orientation is enhanced, and magnetic read/write characteristics are improved. Further, a productivity is improved because the aperture can be enlarged than previously by using the two evaporation portions.
摘要翻译：在具有真空沉积的磁记录介质的制造方法中，在衬底上设置两个屏蔽构件以限定孔。蒸发源位于其中来自蒸发材料的蒸发原子可以通过孔附着到移动的基底上的位置。移动基板，同时沿两个电子束在两个蒸发部分沿着基板的移动方向照射蒸发源中的材料以形成磁性层。因此，抑制了在磁性层中形成的柱状增益的弯曲或晶体取向增强，并提高了磁读/写特性。此外，由于通过使用两个蒸发部分可以比以前增大孔径，所以提高了生产率。

13. 发明授权

US5458914A Method for producing magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US5458914A
公开(公告)日：1995-10-17
申请号：US367996
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 , H01F10/00
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。

14. 发明授权

US5418059A Magnetic recording medium and method for producing the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US5418059A
公开(公告)日：1995-05-23
申请号：US70981
申请日：1993-06-04
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
IPC分类号： G11B5/64 , G11B5/65 , G11B5/66 , G11B5/73 , G11B5/738 , G11B5/85 , G11B5/00
CPC分类号： G11B5/66 , Y10T428/12465 , Y10T428/12931 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording medium having a nonmagnetic substrate, a first magnetic layer which is formed on a surface of the substrate, has an axis of easy magnetization slanting from a normal line of a layer plane, contains cobalt and oxygen in an amount of not more than 40 atomic % and has a thickness of not larger than 0.15 .mu.m, and a second magnetic layer which is formed on a surface of the first magnetic layer, contains cobalt, has an axis of easy magnetization slanting from a normal line of a layer plane, contains oxygen in an amount of not larger than 37 atomic % and from 61 % to 99 % of the oxygen concentration in the first layer, and has a thickness of not larger than 0.15 .mu.m, which medium has a large S/N ratio.
摘要翻译：具有非磁性基板的磁记录介质，形成在基板的表面上的第一磁性层具有从层平面的法线倾斜的易磁化轴，其含有不大于 40原子％，并且具有不大于0.15μm的厚度，并且形成在第一磁性层的表面上的含有钴的第二磁性层具有从层平面的法线倾斜的易磁化轴含有第一层中氧浓度不大于37原子％和61％至99％的氧，并且具有不大于0.15μm的厚度，该介质具有大的S / N比。

15. 发明授权

US06567227B2 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier 失效
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.

16. 发明授权

US5679410A Continuous fabrication of thin film magnetic recording medium with vacuum deposition 失效
标题翻译：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
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Kazunari Yoshimoto
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Kazunari Yoshimoto
IPC分类号： C23C14/24 , C23C14/22 , C23C14/34 , C23C14/56 , G11B5/85 , C23C14/00 , C23C14/04
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。

17. 发明授权

US5427869A Magnetic recording medium and method for producing the same 失效
标题翻译：磁记录介质及其制造方法
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
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/85
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。

18. 发明授权

US5298282A Production of magnetic recording medium 失效
标题翻译：生产磁记录介质
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
IPC分类号： G11B5/66 , G11B5/85 , B05D5/12
CPC分类号： G11B5/66 , G11B5/85
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。

19. 发明授权

US06606209B2 Master information carrier, method for producing the carrier, method and apparatus for writing information into magnetic record medium using the carrier 失效
公开(公告)号：US06606209B2
公开(公告)日：2003-08-12
申请号：US10108032
申请日：2002-03-26
申请人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Keizou Miyata , Hiroshi Ryonai
发明人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , 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.

20. 发明授权

US5534324A Magnetic recording medium and method for producing the same 失效
标题翻译：磁记录介质及其制造方法
公开(公告)号：US5534324A
公开(公告)日：1996-07-09
申请号：US151704
申请日：1993-11-10
申请人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
发明人： Ryuji Sugita , Kiyokazu Tohma , Tatsuaki Ishida , Yasuaki Ban
IPC分类号： G11B5/64 , G11B5/65 , G11B5/66 , G11B5/73 , G11B5/738 , G11B5/85 , H01F1/00 , G11B5/70
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12931
摘要： A magnetic recording medium has a cobalt-based first magnetic layer and a cobalt-based second magnetic layer which are formed on a substrate of high polymer by vacuum evaporation. In order to have a high reproducing output and a high S/N ratio, the first magnetic layer has high oxygen density area which is arranged at a vicinity of the second magnetic layer, and the second magnetic layer has high oxygen density area which is arranged at a vicinity of the first magnetic layer.
摘要翻译：磁记录介质具有钴基第一磁性层和钴基第二磁性层，它们通过真空蒸镀形成在高分子的基片上。为了具有高再现输出和高S / N比，第一磁性层具有高氧浓度区域，其布置在第二磁性层附近，并且第二磁性层具有高的氧气密度区域，其被布置在第一磁性层附近。

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