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1. 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。

2. 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。

3. 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。

4. 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。

5. 发明授权

US07141315B2 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：US07141315B2
公开(公告)日：2006-11-28
申请号：US10630751
申请日：2003-07-31
申请人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
发明人： Kenji Shimizu , Akira Sakawaki , Hiroshi Sakai , Takashi Hikosaka , Futoshi Nakamura
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/7325
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 is alloy containing at least Cr and C. 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板和保护膜，其中定向控制膜是至少含有Cr和C的合金。磁记录介质通过一种方法制造，该方法包括依次进行至少一个步骤，在非磁性基板上形成膜，形成直接控制膜的取向的取向控制膜的步骤，形成具有主要垂直于基板的易磁化轴取向的垂直磁记录膜的步骤，以及形成保护膜的步骤。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。

6. 发明授权

US07166376B2 Magnetic recording medium including a high-magnetostriction layer and magnetic recording/reproducing apparatus 有权
标题翻译：包括高磁致伸缩层和磁记录/再现装置的磁记录介质
公开(公告)号：US07166376B2
公开(公告)日：2007-01-23
申请号：US10786611
申请日：2004-02-26
申请人： Takashi Hikosaka , Futoshi Nakamura , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Takashi Hikosaka , Futoshi Nakamura , Soichi Oikawa , Takeshi Iwasaki , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/653 , G11B5/656
摘要： A multi-layer including a magnetic recording layer and a high-magnetostriction layer having a magnetostriction constant larger than that of the magnetic recording layer is formed.
摘要翻译：形成包括磁记录层和磁致伸缩常数大于磁记录层的磁致伸缩常数的高磁致伸缩层的多层。

7. 发明授权

US07289298B2 Perpendicular magnetic recording medium, method for manufacturing the same, and magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质，其制造方法和磁记录/再现装置
公开(公告)号：US07289298B2
公开(公告)日：2007-10-30
申请号：US10793950
申请日：2004-03-08
申请人： Tomoyuki Maeda , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/653 , G11B5/656
摘要： Disclosed is a magnetic recording medium which includes a substrate, an underlayer, and a perpendicular magnetic recording layer, and in which this perpendicular magnetic recording layer contains magnetic crystal grains and a matrix surrounding the magnetic crystal grains, and the matrix contains an element selected from Zn, Cd, Al, Ga, and In, and a component selected from P, As, Sb, S, Se, and Te.
摘要翻译：公开了一种磁记录介质，其包括基板，底层和垂直磁记录层，并且其中该垂直磁记录层包含磁性晶粒和围绕磁性晶粒的基体，并且该基体包含选自以下的元素： Zn，Cd，Al，Ga和In以及选自P，As，Sb，S，Se和Te的成分。

8. 发明授权

US07105239B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus using the same 失效
公开(公告)号：US07105239B2
公开(公告)日：2006-09-12
申请号：US10234856
申请日：2002-09-05
申请人： Soichi Oikawa , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
发明人： Soichi Oikawa , Takashi Hikosaka , Futoshi Nakamura , Takeshi Iwasaki , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66
摘要： In a magnetic recording medium, a longitudinal hard magnetic layer, interlayer, longitudinal soft magnetic layer, and magnetic recording layer are multilayered on a substrate. The interlayer is one of a magnetic layer having saturation magnetization smaller than that of the longitudinal hard magnetic layer, a nonmagnetic layer mainly containing cobalt or ruthenium or having a thickness of 0.5 nm or less, and an oxide layer of the longitudinal hard magnetic layer.

9. 发明申请

US20080057348A1 Magnetic Recording Medium, Method Of Manufacturing Therefor, And Magnetic Read/Write Apparatus 审中-公开
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：US20080057348A1
公开(公告)日：2008-03-06
申请号：US10541905
申请日：2004-01-14
申请人： Kenji Shimizu , Akira Sakawaki , Kazuo Kobayashi , Nguyen Tien Duong , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa , Tomoyuki Maeda , Futoshi Nakamura
发明人： Kenji Shimizu , Akira Sakawaki , Kazuo Kobayashi , Nguyen Tien Duong , Hiroshi Sakai , Takashi Hikosaka , Soichi Oikawa , Tomoyuki Maeda , Futoshi Nakamura
IPC分类号： G11B5/64 , B05D5/12 , G11B5/33
CPC分类号： G11B5/667 , G11B5/65 , G11B5/656 , G11B5/7325 , G11B5/8404
摘要： A soft magnetic undercoat film, a first undercoat film, a second undercoat film, a perpendicular magnetic recording film, and a protective film are provided on a non-magnetic substrate, and the first undercoat film consists of Pt, Pd, or an alloy including at least one among these, and the second undercoat film consists of Ru or an Ru alloy.
摘要翻译：在非磁性基板上设置软磁性底涂层，第一底涂膜，第二底涂膜，垂直磁记录膜和保护膜，第一底涂层由Pt，Pd或包含其中至少一个，第二底涂膜由Ru或Ru合金组成。

10. 发明授权

US07141316B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质和磁记录/再现装置
公开(公告)号：US07141316B2
公开(公告)日：2006-11-28
申请号：US10801563
申请日：2004-03-17
申请人： Takeshi Iwasaki , Takashi Hikosaka , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Takeshi Iwasaki , Takashi Hikosaka , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/65
CPC分类号： G11B5/7325 , G11B5/656
摘要： Disclosed is a perpendicular magnetic recording medium in which an undercoating layer having crystal grains and a grain boundary material containing a carbide or boride is formed below a perpendicular magnetic recording layer, and another undercoating layer containing one of elements forming the crystal grains is formed below the aforementioned undercoating layer, and which can perform high□density recording by further decreasing the grain size of the perpendicular magnetic recording layer.
摘要翻译：公开了一种垂直磁记录介质，其中具有晶粒的底涂层和含有碳化物或硼化物的晶界物质形成在垂直磁记录层的下方，并且在其下方形成另一个含有形成晶粒的元素的底涂层通过进一步降低垂直磁记录层的晶粒尺寸，可以进行高密度记录。

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