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1. 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.

2. 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.

3. 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。

4. 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。

5. 发明授权

US06961196B2 Master information carrier, method for producing the carrier, method and 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，使用载体将信息写入磁记录介质的方法和装置
公开(公告)号：US06961196B2
公开(公告)日：2005-11-01
申请号：US10396674
申请日：2003-03-25
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： G11B5/596 , G11B5/64 , G11B5/855 , G11B5/86
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。

6. 发明授权

US06347016B1 Master information carrier, process for producing the carrier, and method and apparatus for recording master information signal on magnetic recording medium by using the carrier 失效
公开(公告)号：US06347016B1
公开(公告)日：2002-02-12
申请号：US09101590
申请日：1998-07-13
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.

7. 发明授权

US5472506A Method and apparatus for producing magnetic recording medium 失效
标题翻译：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。

8. 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。

9. 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。

10. 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。

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