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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。
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2.发明授权公开(公告)号：US07083870B2
公开(公告)日：2006-08-01
申请号：US10617822
申请日：2003-07-14
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。
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3.发明授权公开(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
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。
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4.发明授权公开(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
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。
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5.发明授权公开(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
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.
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6.发明授权公开(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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7.发明授权公开(公告)号：US07132176B2
公开(公告)日：2006-11-07
申请号：US10626837
申请日：2003-07-25
申请人： Takeshi Iwasaki , Takashi Hikosaka , Soichi Oikawa , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Takeshi Iwasaki , Takashi Hikosaka , Soichi Oikawa , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
摘要： A perpendicular magnetic recording medium includes a magnetic recording layer stacked on a substrate and having a first perpendicular magnetic recording layer containing cobalt, and a second perpendicular magnetic recording layer mainly containing a crystalline alloy which contains a rare earth element and a transition metal.
摘要翻译： 垂直磁记录介质包括堆叠在基板上并具有包含钴的第一垂直磁记录层的磁记录层和主要含有稀土元素和过渡金属的结晶合金的第二垂直磁记录层。
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公开(公告)号：US06902835B2
公开(公告)日：2005-06-07
申请号：US10454550
申请日：2003-06-05
申请人： Takashi Hikosaka , Takeshi Iwasaki , Futoshi Nakamura , Soichi Oikawa , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Takashi Hikosaka , Takeshi Iwasaki , Futoshi Nakamura , Soichi Oikawa , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/738 , G11B5/00 , G11B5/65 , G11B5/667 , G11B5/73 , G11B5/74 , G11B5/82 , G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/00 , G11B5/7325 , G11B5/74 , G11B5/82 , G11B2005/001 , G11B2005/0029 , Y10T428/265
摘要： A double layered perpendicular recording media having, between a soft magnetic layer and perpendicular magnetic recording layer, an alignment control layer containing an amorphous portion, a crystal size control layer, and an underlayer having one of a hexagonal closest packed structure and a face-centered cubic structure.
摘要翻译： 一种双层垂直记录介质，其在软磁层和垂直磁记录层之间具有包含非晶部分的取向控制层，晶体尺寸控制层和具有六方最密堆积结构和面心的 立方结构。
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9.发明授权公开(公告)号：US07056606B2
公开(公告)日：2006-06-06
申请号：US10781906
申请日：2004-02-20
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。
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10.发明授权公开(公告)号：US07033684B2
公开(公告)日：2006-04-25
申请号：US10617868
申请日：2003-07-14
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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