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1. 发明授权

US4859501A Method for providing a perpendicular recording medium for use with a ring-shaped recording and reproducing head 失效
标题翻译：用于提供与环形记录和再现头一起使用的垂直记录介质的方法
公开(公告)号：US4859501A
公开(公告)日：1989-08-22
申请号：US140278
申请日：1987-12-31
申请人： Ryuji Sugita , Kiyokazu Tohma , Kazuyoshi Honda , Taro Nanbu
发明人： Ryuji Sugita , Kiyokazu Tohma , Kazuyoshi Honda , Taro Nanbu
IPC分类号： G11B5/64
CPC分类号： G11B5/64 , Y10S428/90
摘要： A perpendicular magnetic recording method uses a perpendicular magnetic recording medium. This medium comprises a perpendicular anisotropy film having perpendicular remanent magnetization Mr and longitudinal remanent magnetization Mr.sub..parallel., wherein the value of the ratio Mr.sub..perp. /Mr.sub..parallel. is not less than 0.2, but is less than 1.
摘要翻译：垂直磁记录方法使用垂直磁记录介质。该介质包括具有垂直剩余磁化强度Mr和纵向残余磁化强度Mr PARALLEL的垂直各向异性膜，其中ORTHOGONAL / Mr PARALLEL的比值不小于0.2但小于1。

2. 发明授权

US4999220A Method for manufacturing perpendicular magnetic recording medium 失效
标题翻译：制造垂直磁记录介质的方法
公开(公告)号：US4999220A
公开(公告)日：1991-03-12
申请号：US310994
申请日：1989-02-16
申请人： Kazuyoshi Honda , Ryuji Sugita , Kiyokazu Tohma , Yasuihiro Kawawake , Yoshiki Murakami
发明人： Kazuyoshi Honda , Ryuji Sugita , Kiyokazu Tohma , Yasuihiro Kawawake , Yoshiki Murakami
IPC分类号： G11B5/85
CPC分类号： G11B5/85 , Y10S428/90
摘要： In manufacturing perpendicular magnetic recording medium wherein a magnetic layer containing Co and Cr as main contents on a running substrate of polymer film incident angle (.phi..sub.f) of vaporized atom to form said magnetic layer is 30.degree. or larger at the final part of the film formation to improve manufacturing capacity, and magnetic layer (119) is heated after forming the magnetic layer in an oxygen-containing atmosphere.

3. 发明授权

US5433999A Magnetic recording medium comprising specific backcoat layer 失效
标题翻译：包含特定背涂层的磁记录介质
公开(公告)号：US5433999A
公开(公告)日：1995-07-18
申请号：US128075
申请日：1993-09-29
申请人： Yoshiki Goto , Yukihiro Shimasaki , Kazuyoshi Honda , Tatsuaki Ishida , Kiyokazu Tohma , Ryuji Sugita , Yasuhiro Kawawake
发明人： Yoshiki Goto , Yukihiro Shimasaki , Kazuyoshi Honda , Tatsuaki Ishida , Kiyokazu Tohma , Ryuji Sugita , Yasuhiro Kawawake
IPC分类号： G11B5/73 , G11B5/735 , B32B5/16
CPC分类号： G11B5/735 , Y10S428/90 , Y10T428/257
摘要： In a magnetic recording medium with a back coat layer including polyurethane having a Tg (glass-transition temperature) below room temperature, isocyanate hardener, carbon powder and inorganic abrasive pigment are formed on a face of a non-magnetic substrate opposite a face covered by a magnetic recording film. Using this back coat layer, improved post contact characteristics and the like are obtained and smooth running conditions under small tensions are realized. Further, the magnetic recording medium causes only a small amount of head wear, and the medium has improved wear resistance.
摘要翻译：在具有Tg（玻璃化转变温度）低于室温的聚氨酯的背涂层的磁记录介质中，在非磁性基板的与被覆盖的表面相对的表面上形成异氰酸酯硬化剂，碳粉末和无机研磨颜料磁记录膜。使用这种背涂层，获得改进的后接触特性等，并实现在小张力下的平滑运行条件。此外，磁记录介质仅导致少量的头部磨损，并且介质具有改善的耐磨性。

4. 发明授权

US5202149A Method for making a magnetic recording medium 失效
标题翻译：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。

5. 发明授权

US5087476A Method of producing thin film 失效
标题翻译：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.

6. 发明授权

US06606208B2 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：US06606208B2
公开(公告)日：2003-08-12
申请号：US10085503
申请日：2002-02-26
申请人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
发明人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
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.

7. 发明授权

US06590727B2 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：US06590727B2
公开(公告)日：2003-07-08
申请号：US10027871
申请日：2001-12-21
申请人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
发明人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
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.

8. 发明授权

US06587290B2 Master information carrier, method for producing the carrier, and method apparatus for writing information into magnetic record medium using the carrier 失效
标题翻译：主信息载体，用于生成载体的方法，以及使用载体将信息写入磁记录介质的方法装置
公开(公告)号：US06587290B2
公开(公告)日：2003-07-01
申请号：US10086236
申请日：2002-02-26
申请人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
发明人： Tatsuaki Ishida , Ryuji Sugita , Kiyokazu Tohma , Kazunari Yoshimoto , Keizou Miyata
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.
摘要翻译：主信息载体包括其表面具有对应于信息信号的压纹图案的基板。浮雕图案的突出部分的至少一个表面由铁磁材料制成。通过使磁记录介质的表面与主信息载体接触，将信息信号写入具有铁磁薄膜或涂层的片或磁盘记录介质的方法，以写入对应于主信息载体的压花图案进入磁记录介质。

9. 发明授权

US5554440A 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：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。

10. 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.

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