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1. 发明授权

US06818331B2 Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus 失效
标题翻译：磁记录介质，其制造方法以及磁记录和重放装置
公开(公告)号：US06818331B2
公开(公告)日：2004-11-16
申请号：US10228952
申请日：2002-08-28
申请人： Akira Sakawaki , Kenji Shimizu , Hiro Mochizuki , Masato Kokubu , Hui Yang , Masakazu Kobayashi , Hiroshi Sakai
发明人： Akira Sakawaki , Kenji Shimizu , Hiro Mochizuki , Masato Kokubu , Hui Yang , Masakazu Kobayashi , Hiroshi Sakai
IPC分类号： G11B566
CPC分类号： G11B5/656 , G11B5/66 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium having a non-magnetic substrate; an orientation-regulating layer for regulating the crystal orientation of a layer provided directly thereon; a perpendicular magnetic layer in which easy-magnetization axes are oriented generally perpendicular to the substrate; and a protective layer is disclosed. The perpendicular magnetic layer is formed from a material containing Co as a primary component and at least Cr, Pt, and Nd. A process to produce the magnetic recording medium and a magnetic recording and reproducing apparatus are also disclosed.
摘要翻译：一种具有非磁性基片的磁记录介质; 用于调节直接设置在其上的层的晶体取向的取向调节层; 易磁化轴大致垂直于基板定向的垂直磁性层; 并且公开了保护层。垂直磁性层由含有Co作为主要成分并且至少包含Cr，Pt和Nd的材料形成。还公开了制造磁记录介质的过程和磁记录和再现装置。

2. 发明申请

US20050037140A1 Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus 审中-公开
标题翻译：磁记录介质，其制造方法以及磁记录和重放装置
公开(公告)号：US20050037140A1
公开(公告)日：2005-02-17
申请号：US10953536
申请日：2004-09-30
申请人： Akira Sakawaki , Kenji Shimizu , Hiro Mochizuki , Masato Kokubu , Hui Yang , Masakazu Kobayashi , Hiroshi Sakai
发明人： Akira Sakawaki , Kenji Shimizu , Hiro Mochizuki , Masato Kokubu , Hui Yang , Masakazu Kobayashi , Hiroshi Sakai
IPC分类号： G11B5/64 , G11B5/66 , G11B5/851 , B05D5/12 , B05D3/10
CPC分类号： G11B5/656 , G11B5/66 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium having a non-magnetic substrate; an orientation-regulating layer for regulating layer for regulating the crystal orientation of a layer provided directly thereon; a perpendicular magnetic layer in which easy-magnetization axes are oriented generally perpendicular to the substrate; and a protective layer is disclosed. The perpendicular magnetic layer is formed from a material containing Co as a primary component and at least Cr, Pt, and Nd. A process to produce the magnetic recording medium and a magnetic recording and reproducing apparatus are also disclosed.
摘要翻译：一种具有非磁性基片的磁记录介质; 用于调节直接设置在其上的层的晶体取向的调节层的取向调节层; 易磁化轴大致垂直于基板定向的垂直磁性层; 并且公开了保护层。垂直磁性层由含有Co作为主要成分并且至少包含Cr，Pt和Nd的材料形成。还公开了制造磁记录介质的过程和磁记录和再现装置。

3. 发明授权

US06723458B2 Magnetic recording medium, method of manufacture therefor, and magnetic read/write apparatus 失效
标题翻译：磁记录介质，其制造方法和磁读/写装置
公开(公告)号：US06723458B2
公开(公告)日：2004-04-20
申请号：US10218570
申请日：2002-08-15
申请人： Kenji Shimizu , Akira Sakawaki , Hui Yang , Hiro Mochizuki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
发明人： Kenji Shimizu , Akira Sakawaki , Hui Yang , Hiro Mochizuki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
IPC分类号： G11B566
CPC分类号： G11B5/667 , G11B5/656 , G11B5/7325 , Y10S428/90
摘要： A magnetic recording medium that is capable of recording and reading back information at a higher density by improving the read/write characteristics and thermal stability, a method of manufacture therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium, comprises an orientation control film that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film, of which the axis of easy magnetization is generally oriented perpendicular to a non-magnetic substrate, and a protective film, that are provided on the non-magnetic substrate, wherein the perpendicular magnetic film is made of a material which contains Co, Cr, Pt and Cu, the Cr content being 16 at % to 24 at % and the Cu content being 0.1 at % to 4 at %, and a coercive force (Hc) of the perpendicular magnetic film being at least 3000 (Oe), negative nucleation field (−Hn) being 0 (Oe) to 2500 (Oe), and a ratio of residual magnetization (Mr) to saturation magnetization (Ms) being at least 0.85.
摘要翻译：提供能够通过改善读/写特性和热稳定性而以更高密度记录和读回信息的磁记录介质，其制造方法和磁读/写装置。这种磁记录介质包括控制直接在其上设置的膜的取向的取向控制膜，容易磁化轴垂直于非磁性基板的垂直磁性膜和保护膜，其中设置在非磁性基板上，其中垂直磁性膜由含有Co，Cr，Pt和Cu的材料制成，Cr含量为16at％至24at％，Cu含量为0.1at％至4 （Oe），负成核场（-Hn）为0（Oe）〜2500（Oe），剩余磁化强度（Mr））为0以上，垂直磁性膜的矫顽力（Hc）为3000 饱和磁化强度（Ms）至少为0.85。

4. 发明授权

US06884519B2 Magnetic recording medium, including an HCP structured Ni-alloy control film method of manufacture therefor, and magnetic read/write apparatus 失效
标题翻译：磁记录介质，包括其制造的HCP结构的Ni合金控制膜方法和磁读/写装置
公开(公告)号：US06884519B2
公开(公告)日：2005-04-26
申请号：US10242446
申请日：2002-09-13
申请人： Kenji Shimizu , Akira Sakawaki , Hui Yang , Hiro Mochizuki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
发明人： Kenji Shimizu , Akira Sakawaki , Hui Yang , Hiro Mochizuki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
IPC分类号： G11B5/64 , G11B5/66 , G11B5/73 , G11B5/667
CPC分类号： G11B5/667 , G11B5/656 , G11B5/66 , G11B5/7325 , Y10T428/12465 , Y10T428/12861 , Y10T428/12931 , Y10T428/12944 , Y10T428/265
摘要： A magnetic recording medium having excellent magnetic read/write characteristics and thermal stability characteristics, and a method of manufacturing therefor, and a magnetic read/write apparatus are provided. This magnetic recording medium comprises an orientation control film 3 that controls the orientation of a film provided directly thereabove, a perpendicular magnetic film 5, of which the axis of easy magnetization is generally oriented perpendicular to a substrate, and a protective film 6, that are provided on a non-magnetic substrate 1, wherein the orientation control film 3 is made of a non-magnetic material which contains 33 to 80 at % of Ni and one or more kinds of elements selected from Sc, Y, Ti, Zr, Hf, Nb and Ta.
摘要翻译：提供具有优异的磁读/写特性和热稳定性特性的磁记录介质及其制造方法和磁读/写装置。这种磁记录介质包括控制直接在其上设置的膜的取向的取向控制膜3，容易磁化轴线垂直于基板的垂直磁性膜5和保护膜6，设置在非磁性基板1上，其中取向控制膜3由非磁性材料制成，该非磁性材料包含33至80原子％的Ni和选自Sc，Y，Ti，Zr，Hf中的一种或多种元素，Nb和Ta。

5. 发明授权

US06682826B2 Magnetic recording medium, method of manufacturing therefor, and magnetic read/write apparatus 有权
标题翻译：磁记录介质，其制造方法和磁读/写装置
公开(公告)号：US06682826B2
公开(公告)日：2004-01-27
申请号：US10202096
申请日：2002-07-25
申请人： Kenji Shimizu , Akira Sakawaki , Hiro Mochizuki , Hiroshi Sakai , Soichi Oikawa , Takashi Hikosaka
发明人： Kenji Shimizu , Akira Sakawaki , Hiro Mochizuki , Hiroshi Sakai , Soichi Oikawa , Takashi Hikosaka
IPC分类号： G11B5667
CPC分类号： G11B5/667 , G11B5/7325 , G11B2005/0005 , G11B2005/001 , G11B2005/0029 , Y10T428/12806 , Y10T428/12826 , Y10T428/12847 , Y10T428/12854 , Y10T428/12861 , Y10T428/24942 , Y10T428/31
摘要： The present invention provides a magnetic recording medium having excellent magnetic read/write characteristics and thermal stability, a method of manufacturing therefor, and a magnetic read/write apparatus. The magnetic recording medium comprises a soft magnetic undercoat film, an orientation control film, a perpendicular magnetization film, and a protective film, that are formed on a non-magnetic substrate, wherein the orientation control film has an hcp structure and, at the same time, &Dgr;&thgr;50 of the (0002) orientation plane is set within a range from 3 to 10 degrees and a difference (&Dgr;&thgr;50 (mag)−&Dgr;&thgr;50 (ori)) between &Dgr;&thgr;50 (ori) of the orientation control film and &Dgr;&thgr;50 (mag) of the perpendicular magnetization film is set within a range from 1 to 8 degrees.
摘要翻译：本发明提供了具有优异的磁读/写特性和热稳定性的磁记录介质，其制造方法和磁读/写装置。磁记录介质包括形成在非磁性基板上的软磁性底涂膜，取向控制膜，垂直磁化膜和保护膜，其中取向控制膜具有hcp结构，并且在相同时间，（0002）取向平面的Deltatheta50设定在3至10度的范围内，并且取向控制膜的Deltatheta50（ori）和Deltatheta50（mag）之间的差（Deltatheta50（mag）-Deltatheta50（ori）））垂直磁化膜设定在1〜8度的范围内。

6. 发明授权

US06844046B2 Magnetic recording medium, production process thereof, magnetic recording and reproducing apparatus, and sputtering target 失效
标题翻译：磁记录介质，其制造方法，磁记录和重放装置以及溅射靶
公开(公告)号：US06844046B2
公开(公告)日：2005-01-18
申请号：US10405932
申请日：2003-04-03
申请人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
发明人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
IPC分类号： G11B5/84 , G11B5/851 , G11B5/738
CPC分类号： G11B5/8404 , G11B5/851 , Y10T428/12944 , Y10T428/24355 , Y10T428/265
摘要： An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.
摘要翻译：本发明的目的是提供一种易于制造表现出优异的磁特性的磁记录介质的方法。在本发明中，在经过纹理化的非金属基材上形成取向决定膜，取向决定膜进行氧化或氮化，在该金属基材上形成非磁性底涂膜和磁性膜电影。

7. 发明授权

US06686072B2 Magnetic recording medium, process and apparatus for producing the same, and magnetic recording and reproducing apparatus 失效
标题翻译：磁记录介质，其制造方法和装置以及磁记录和再现装置
公开(公告)号：US06686072B2
公开(公告)日：2004-02-03
申请号：US09940853
申请日：2001-08-29
申请人： Akira Sakawaki , Masato Kokubu , Hiroshi Sakai
发明人： Akira Sakawaki , Masato Kokubu , Hiroshi Sakai
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/8404 , Y10S428/90 , Y10T428/12465
摘要： A magnetic recording medium which exhibits excellent magnetic characteristics and which can be easily produced is disclosed. A magnetic recording medium containing a non-metallic substrate 1, a non-magnetic undercoat film 3, a cobalt alloy hexagonal closed packed (hcp) (110) textured magnetic film 4, and a protective film 5 formed on the substrate. An orientation-determining film 2, which determines the crystal orientation of an undercoat film provided directly thereon to cause the texture of the undercoat film to be (200), is formed between the substrate 1 and the undercoat film 3. The orientation-determining film 2 has a crystal structure such that columnar fine crystal grains 2a are inclined in a radial direction of the substrate 1, and the ratio of a coercive force in a circumferential direction of the medium (Hcc) to a coercive force in a radial direction of the medium (Hcr); i.e., Hcc/Hcr, is more than 1.
摘要翻译：公开了一种表现出优异的磁特性并且易于生产的磁记录介质。包含非金属基底1，非磁性底涂层3，钴合金六方密封（hcp）（110）纹理磁性膜4和形成在基底上的保护膜5的磁记录介质。在基板1和底涂膜3之间形成取向决定膜2，该取向决定膜2确定直接设置在其上以使底涂层的织构成为（200）的底涂膜的晶体取向。取向决定膜 2具有晶体结构，使得柱状细晶粒2a沿着基板1的径向倾斜，并且介质（Hcc）的圆周方向上的矫顽力与径向方向上的矫顽力的比率中等（Hcr）; 即Hcc / Hcr大于1。

8. 发明授权

US06582758B2 Process of producing 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：US06582758B2
公开(公告)日：2003-06-24
申请号：US09810193
申请日：2001-03-19
申请人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
发明人： Akira Sakawaki , Masato Kokubu , Ryuji Sakaguchi , Hiroshi Sakai
IPC分类号： B05D512
CPC分类号： G11B5/8404 , G11B5/851 , Y10T428/12944 , Y10T428/24355 , Y10T428/265
摘要： An object of the present invention is to provide a process for easily producing a magnetic recording medium exhibiting excellent magnetic characteristics. In the present invention, an orientation-determining film is formed on a non-metallic substrate which has undergone texturing, the orientation-determining film is subjected to oxidation or nitridation, and a non-magnetic undercoat film and a magnetic film are formed on the film.
摘要翻译：本发明的目的是提供一种易于制造表现出优异的磁特性的磁记录介质的方法。在本发明中，在经过纹理化的非金属基材上形成取向决定膜，取向决定膜进行氧化或氮化，在该金属基材上形成非磁性底涂膜和磁性膜电影。

9. 发明授权

US07252896B2 Magnetic recording medium and magnetic recording/reproducing apparatus 有权
标题翻译：磁记录介质和磁记录/再现装置
公开(公告)号：US07252896B2
公开(公告)日：2007-08-07
申请号：US10788259
申请日：2004-02-27
申请人： Futoshi Nakamura , Takashi Hikosaka , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Futoshi Nakamura , Takashi Hikosaka , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/667 , G11B5/7325
摘要： An orientation control layer having a granular structure is formed between a substrate and magnetic recording layer, contains a base material and grains dispersed in the base material, and having a thickness smaller than a grain size of the grains.
摘要翻译：具有颗粒结构的取向控制层形成在基板和磁记录层之间，包含分散在基材中的基材和颗粒，其厚度小于晶粒的晶粒尺寸。

10. 发明申请

US20060204791A1 Magnetic recording medium, method for producing thereof, and magnetic recording and reproducing apparatus 有权
标题翻译：磁记录介质，其制造方法以及磁记录和再现装置
公开(公告)号：US20060204791A1
公开(公告)日：2006-09-14
申请号：US10552445
申请日：2004-04-07
申请人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
发明人： Akira Sakawaki , Kenji Shimizu , Kazuo Kobayashi , Hiroshi Sakai , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Futoshi Nakamura
IPC分类号： G11B5/66 , B05D5/12
CPC分类号： G11B5/656 , G11B5/65 , G11B5/66
摘要： A magnetic recording medium which is provided on a nonmagnetic substrate 1 with at least an orientation-controlling layer 3 for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer 4 having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate 1, and a protective layer 5 and characterized in that the perpendicularly magnetic layer 4 includes two or more magnetic layers, that at least one of the magnetic layers is a layer 4a having Co as a main component and containing Pt as well and containing an oxide and that at least another of the magnetic layers is a layer 4b having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译：一种磁性记录介质，其设置在至少具有用于控制直接形成的层的取向的取向控制层3的非磁性基板1上，具有相对于非磁性基板主要垂直取向的易磁化轴的垂直磁性层4 1和保护层5，其特征在于，垂直磁性层4包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且含有Pt的层4a，并且含有并且至少另一个磁性层是具有Co作为主要成分并且含有Cr并且不含氧化物的层4b。

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