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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

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。

7. 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。

8. 发明授权

US07083870B2 Magnetic recording medium, method of manufacturing the same, and magnetic recording and reproduction apparatus 失效
标题翻译：磁记录媒体及其制造方法以及磁记录再生装置
公开(公告)号：US07083870B2
公开(公告)日：2006-08-01
申请号：US10617822
申请日：2003-07-14
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Takeshi Iwasaki
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Takeshi Iwasaki
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/65 , G11B5/7325 , G11B2005/0029
摘要： A magnetic recording medium includes a nonmagnetic substrate on which is provided at least a soft magnetic under-film, an orientation control film that controls an orientation of a film directly above, a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate and a protective film, wherein the orientation control film has a material composition forming a C11b structure. The magnetic recording medium is manufactured by a method including carrying out, in order, at least a step of forming a soft magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film. A magnetic recording and reproduction apparatus includes the magnetic recording medium and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.
摘要翻译：磁记录介质包括至少设置有软磁性底膜的非磁性基板，控制正上方的膜的取向的取向控制膜，具有容易磁化的轴的垂直磁记录膜主要取向为垂直于基底和保护膜，其中取向控制膜具有形成C 11 B 17结构的材料组合物。该磁记录介质是通过以下方法制造的，该方法包括以下步骤：至少在非磁性基板上形成软磁性底膜的步骤，形成控制膜直接定向的取向控制膜的步骤形成具有易于磁化的轴取向为主要垂直于基板的垂直磁记录膜的步骤和形成保护膜的步骤。磁记录和再现装置包括磁记录介质和在磁记录介质上记录和再现信息的磁头，其中磁头是磁单极头。

9. 发明授权

US07056606B2 Magnetic recording medium, method manufacture therefor, and apparatus for magnetic reproducing and reproducing recordings 有权
标题翻译：磁记录介质及其制造方法以及用于磁再现和再现记录的设备
公开(公告)号：US07056606B2
公开(公告)日：2006-06-06
申请号：US10781906
申请日：2004-02-20
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
IPC分类号： G11B5/65
CPC分类号： G11B5/855 , G11B5/656 , G11B5/667 , G11B5/7325
摘要： A magnetic recording medium comprising: on a non-magnetic substrate, at least a soft magnetic undercoat film comprising a soft magnetic material; an orientation control film for controlling an orientation of a film directly above; a perpendicular magnetic film in which an axis of easy magnetization is oriented mainly perpendicularly with respect to the substrate; and a protection film, wherein the perpendicular magnetic film has a structure in which a large number of magnetic grains are separated by a grain boundary layer, and an average separating distance between the magnetic grains along a straight line which connects centers of gravity of mutually neighboring magnetic grains is 1 nm or greater.
摘要翻译：一种磁记录介质，包括：在非磁性基底上，至少包含软磁性材料的软磁性底涂层; 用于直接控制膜的取向的取向控制膜; 垂直磁性膜，其中容易磁化的轴主要相对于衬底垂直取向; 和保护膜，其中垂直磁性膜具有其中大量的磁性颗粒被晶界层分离的结构，以及沿着相互相邻的重心的直线的磁性颗粒之间的平均分离距离磁性粒子为1nm以上。

10. 发明授权

US07033684B2 Magnetic recording medium, method of manufacture thereof, 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：US07033684B2
公开(公告)日：2006-04-25
申请号：US10617868
申请日：2003-07-14
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66
摘要： A magnetic recording medium comprising at least a soft magnetic layer, an orientation control film that controls the orientation of a film provided directly thereabove, an intermediate film, a perpendicular magnetic recording 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 said substrate, wherein the intermediate film has saturation magnetization Ms of at least 20 (emu/cc) and equal to or less than 200 (emu/cc), a method of manufacture thereof, and a magnetic read/write apparatus.
摘要翻译：至少包括软磁性层的磁记录介质，控制其上方直接设置的膜的取向的取向控制膜，中间膜，垂直磁记录膜，易磁化轴通常垂直于非磁性层磁性基板和保护膜，其中所述中间膜具有至少20（emu / cc）且等于或小于200（emu / cc）的饱和磁化强度Ms，制造方法和磁读/写装置。

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