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1.发明申请公开(公告)号：US20090141399A1
公开(公告)日：2009-06-04
申请号：US12274879
申请日：2008-11-20
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
摘要： A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic layer includes two or more magnetic layers, at least one of the magnetic layers is a layer having Co as a main component and containing Pt as well and containing an oxide, and at least another of the magnetic layers is a layer having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译： 一种磁记录介质，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的非磁性基板上，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，以及 保护层。 垂直磁性层包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且还含有Pt并含有氧化物的层，并且至少另一个磁性层是具有Co 作为主要成分，并含有Cr，也不含氧化物。
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2.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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3.发明申请公开(公告)号：US20070042227A1
公开(公告)日：2007-02-22
申请号：US10572780
申请日：2004-09-22
申请人： Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
发明人： Takeshi Iwasaki , Soichi Oikawa , Futoshi Nakamura , Tomoyuki Maeda , Hiroshi Sakai , Akira Sakawaki , Kenji Shimizu
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/656 , G11B5/667 , G11B5/732 , G11B5/7325
摘要： To make possible high density recording by making the structure of the perpendicular magnetic recording layer finer. A perpendicular magnetic recording medium 10 includes at least a nonmagnetic under layer 2, a perpendicular magnetic layer 3, and a protective layer which are stacked on a nonmagnetic substrate 1, wherein the perpendicular magnetic layer includes ferromagnetic crystal grains and nonmagnetic crystal grain boundary regions, wherein the crystal grain boundary region includes at least two kinds of oxide.
摘要翻译： 通过使垂直磁记录层的结构更细，可以实现高密度记录。 垂直磁记录介质10至少包括层叠在非磁性基板1上的非磁性底层2，垂直磁性层3和保护层，其中垂直磁性层包括铁磁晶粒和非磁性晶粒边界区域， 其中所述晶界区包括至少两种氧化物。
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4.发明授权公开(公告)号：US07781081B2
公开(公告)日：2010-08-24
申请号：US10583951
申请日：2004-12-24
申请人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , C23C14/0688 , C23C14/185 , G11B5/65 , G11B5/656 , G11B5/712 , G11B5/85
摘要： A magnetic recording medium 62 wherein a substrate 11, undercoating layers 13 and 14 formed on the substrate 11, and a magnetic recording layer 15, which include the magnetic crystal grain and the grain boundary field which encloses magnetic crystal grains, are included. The grain boundary field includes Ti oxide, and the ratio of the substance amount of the Ti oxide in the magnetic recording layer 15 is 5 mol % or more and 15 mol % or less, and the Ti oxide includes at least TiO and/or Ti2O3s.
摘要翻译： 包括磁记录介质62，其中包括形成在基板11上的基板11，底涂层13和14以及磁记录层15，其包括磁晶粒和包围磁晶粒的晶界。 晶界包括Ti氧化物，磁记录层15中的Ti氧化物的物质的比例为5摩尔％以上且15摩尔％以下，Ti氧化物至少包含TiO和/或Ti 2 O 3 。
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5.发明申请公开(公告)号：US20070148500A1
公开(公告)日：2007-06-28
申请号：US10583951
申请日：2004-12-24
申请人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
CPC分类号： G11B5/7325 , C23C14/0688 , C23C14/185 , G11B5/65 , G11B5/656 , G11B5/712 , G11B5/85
摘要： A magnetic recording medium 62 wherein a substrate 11, undercoating layers 13 and 14 formed on the substrate 11, and a magnetic recording layer 15, which include the magnetic crystal grain and the grain boundary field which encloses magnetic crystal grains, are included. The grain boundary field includes Ti oxide, and the ratio of the substance amount of the Ti oxide in the magnetic recording layer 15 is 5 mol % or more and 15 mol % or less, and the Ti oxide includes at least TiO and/or Ti2O3s.
摘要翻译： 包括磁记录介质62，其中包括形成在基板11上的基板11，底涂层13和14以及磁记录层15，其包括磁晶粒和包围磁晶粒的晶界。 晶界包含Ti氧化物，磁记录层15中的Ti氧化物的物质的比例为5摩尔％以上且15摩尔％以下，Ti氧化物至少包含TiO和/或Ti 2＆lt; 3＆gt; 3＆lt; 3＆gt;
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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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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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8.发明申请公开(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
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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9.发明授权公开(公告)号：US07901803B2
公开(公告)日：2011-03-08
申请号：US10574573
申请日：2004-10-05
申请人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
发明人： Tomoyuki Maeda , Soichi Oikawa , Takeshi Iwasaki , Futoshi Nakamura , Hiroshi Sakai , Kenji Shimizu , Akira Sakawaki
CPC分类号： G11B5/65 , G11B5/656 , G11B5/7325
摘要： A perpendicular magnetic recording medium includes: a substrate; at least one underlayer formed above the substrate; and a perpendicular magnetic recording layer formed above the at least one underlayer, an easy magnetization axis of the perpendicular magnetic recording layer being oriented perpendicular to the substrate, the perpendicular magnetic recording layer including magnetic crystal particles and grain boundaries surrounding the magnetic crystal particles, wherein the grain boundaries contain an oxide of silicon and at least one element selected from the group consisting of Li, Na, K, Rb, Cs, Ca, Sr, and Ba, and the ratio of a total amount of substance of Si, Li, Na, K, Rb, Cs, Ca, Sr, and Ba in the perpendicular magnetic recording layer is no less than 1 mol % and no more than 20 mol %.
摘要翻译： 垂直磁记录介质包括：基板; 至少一个底层形成在所述基底上; 以及形成在所述至少一个底层上方的垂直磁记录层，所述垂直磁记录层的易磁化轴垂直于所述衬底取向，所述垂直磁记录层包括磁性结晶颗粒和包围所述磁性结晶颗粒的晶界，其中 晶界包含硅的氧化物和选自Li，Na，K，Rb，Cs，Ca，Sr和Ba中的至少一种元素，并且Si，Li， 垂直磁记录层中的Na，K，Rb，Cs，Ca，Sr和Ba不小于1mol％且不大于20mol％。
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10.发明授权公开(公告)号：US07867638B2
公开(公告)日：2011-01-11
申请号：US12274879
申请日：2008-11-20
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
摘要： A magnetic-recording medium which is provided on a nonmagnetic substrate with at least an orientation-controlling layer for controlling the orientation of a layer formed directly thereon, a perpendicularly magnetic layer having an easily magnetizing axis oriented mainly perpendicularly relative to the nonmagnetic substrate, and a protective layer. The perpendicularly magnetic layer includes two or more magnetic layers, at least one of the magnetic layers is a layer having Co as a main component and containing Pt as well and containing an oxide, and at least another of the magnetic layers is a layer having Co as a main component and containing Cr as well and containing no oxide.
摘要翻译： 一种磁记录介质，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的非磁性基板上，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，以及 保护层。 垂直磁性层包括两个或更多个磁性层，至少一个磁性层是具有Co作为主要成分并且还含有Pt并含有氧化物的层，并且至少另一个磁性层是具有Co 作为主要成分，并含有Cr，也不含氧化物。
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