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1.发明申请MAGNETIC RECORDING MEDIUM, PROCESS FOR PRODUCING SAME, AND MAGNETIC RECORDING REPRODUCING APPARATUS USING THE MAGNETIC RECORDING MEDIUM 审中-公开磁记录介质，其制造方法以及使用磁记录介质的磁记录重现装置公开(公告)号：US20100079911A1
公开(公告)日：2010-04-01
申请号：US12597699
申请日：2008-04-28
摘要： A perpendicular magnetic recording medium is provided, which has a backing layer, a primer layer, an intermediate layer and at least one perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer contains Co and Cr, and at least one of the perpendicular magnetic recording layer or layers has a granular structure comprising ferromagnetic crystal grains and grain boundaries comprised of non-magnetic tungsten oxide. The perpendicular magnetic recording layer may be a double-layered structure comprising the tungsten oxide grain boundary-containing layer and a Cr oxide, Si oxide, Ta oxide or Ti oxide grain boundary-containing layer formed on the tungsten oxide grain boundary-containing layer. The perpendicular magnetic recording medium exhibits good perpendicular orientation and has ferromagnetic crystal grains with extremely small grain size, and thus, is superior in high recording density characteristic.
摘要翻译： 提供了一种具有背衬层，底漆层，中间层和至少一个垂直磁记录层的垂直磁记录介质，其特征在于垂直磁记录层含有Co和Cr，并且其中至少一个 垂直磁记录层具有包含铁磁晶粒和由非磁性氧化钨构成的晶界的粒状结构。 垂直磁记录层可以是包含形成在氧化钨晶界含有层上的氧化钨晶界层和在氧化钨晶界含有层上形成的Cr氧化物，氧化硅，氧化物或氧化钛晶界的层的双层结构。 垂直磁记录介质具有良好的垂直取向，并且具有极小晶粒尺寸的铁磁晶粒，因此具有优异的高记录密度特性。
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2.发明申请公开(公告)号：US20100247961A1
公开(公告)日：2010-09-30
申请号：US12525943
申请日：2008-01-16
IPC分类号： G11B5/33
CPC分类号： G11B5/8404 , G11B5/7325
摘要： In a perpendicular magnetic recording medium having at least a soft magnetic back layer, an underlayer, an intermediate layer and a perpendicular magnetic recording layer on a nonmagnetic substrate, at least one layer in the intermediate layer contains Re as a main component element and contains, as a second main component element, an element having an hcp structure or an element having a bcc structure. The concentration of Re as the main component element of the intermediate layer is within the range from 55 to 99.5 atomic percent. The second component element is Co or Cr.
摘要翻译： 在非磁性基板上至少具有软磁性背层，底层，中间层和垂直磁记录层的垂直磁记录介质中，中间层中的至少一层含有Re作为主要成分元素， 作为第二主要元件元件，具有hcp结构的元件或具有bcc结构的元件。 作为中间层的主要成分的Re的浓度在55〜99.5原子％的范围内。 第二组分元素是Co或Cr。
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3.发明申请公开(公告)号：US20100136370A1
公开(公告)日：2010-06-03
申请号：US12530423
申请日：2008-02-19
IPC分类号： G11B5/33
CPC分类号： G11B5/7325 , Y10T428/11
摘要： The present invention provides a magnetic recording medium capable of reducing the diameter of particles of a perpendicular magnetic recording layer and obtaining a high perpendicular orientation to enable information to be recorded or reproduced at a high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A perpendicular magnetic recording medium includes a non-magnetic substrate; and at least a soft magnetic layer, an underlayer, an intermediate layer, and a perpendicular magnetic recording layer that are formed on the non-magnetic substrate in this order. The underlayer is a (111) crystal orientation layer having an fcc structure, and the intermediate layer includes a (110) crystal orientation layer having a bcc structure and a (002) crystal orientation layer having an hcp structure in this order. The (110) crystal orientation layer having the bcc structure includes 60 at % or more of Cr.
摘要翻译： 本发明提供一种磁记录介质，其能够减小垂直磁记录层的颗粒的直径并获得高垂直取向以使信息以高密度记录或再现，其制造方法和磁性 记录/再现装置。 垂直磁记录介质包括非磁性基片; 以及至少形成在非磁性基板上的软磁性层，底层，中间层和垂直磁记录层。 底层是具有fcc结构的（111）晶体取向层，中间层包括具有bcc结构的（110）晶体取向层和具有hcp结构的（002）晶体取向层。 具有bcc结构的（110）结晶取向层包含60原子％以上的Cr。
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4.发明授权公开(公告)号：US08512884B2
公开(公告)日：2013-08-20
申请号：US12675090
申请日：2008-08-28
申请人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
发明人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/7325 , G11B5/8404 , G11B5/851
摘要： A perpendicular magnetic recording medium including at least a soft under layer, an orientation control layer, a magnetic recording layer and a protective layer on a non-magnetic substrate, wherein the orientation control layer is composed of three or more layers including a seed layer, a first intermediate layer and a second intermediate layer sequentially, formed in that order from the substrate side, the crystal grains that constitute the first intermediate layer are epitaxially grown on the crystal grains of the seed layer, the crystal grains that constitute the second intermediate layer are epitaxially grown on the crystal grains of the first intermediate layer, and the crystal grains that constitute the second intermediate layer are finer than the crystal grains that constitute the first intermediate layer.
摘要翻译： 一种在非磁性基板上至少含有软底层，取向控制层，磁记录层和保护层的垂直磁记录介质，其中所述取向控制层由三层或更多层构成，包括种子层， 从衬底侧依次形成第一中间层和第二中间层，构成第一中间层的晶粒在籽晶层的晶粒上外延生长，构成第二中间层的晶粒 在第一中间层的晶粒上外延生长，构成第二中间层的晶粒比构成第一中间层的晶粒更细。
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5.发明申请公开(公告)号：US20110151280A1
公开(公告)日：2011-06-23
申请号：US12675090
申请日：2008-08-28
申请人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
发明人： Migaku Takahashi , Shin Saito , Gohei Kurokawa , Yuzo Sasaki , Tatsu Komatsuda , Atsushi Hashimoto , Akihiko Takeo , Tomoyuki Maeda
CPC分类号： G11B5/732 , G11B5/7325 , G11B5/8404 , G11B5/851
摘要： A perpendicular magnetic recording medium including at least a soft under layer, an orientation control layer, a magnetic recording layer and a protective layer on a non-magnetic substrate, wherein the orientation control layer is composed of three or more layers including a seed layer, a first intermediate layer and a second intermediate layer sequentially, formed in that order from the substrate side, the crystal grains that constitute the first intermediate layer are epitaxially grown on the crystal grains of the seed layer, the crystal grains that constitute the second intermediate layer are epitaxially grown on the crystal grains of the first intermediate layer, and the crystal grains that constitute the second intermediate layer are finer than the crystal grains that constitute the first intermediate layer.
摘要翻译： 一种在非磁性基板上至少含有软底层，取向控制层，磁记录层和保护层的垂直磁记录介质，其中所述取向控制层由三层或更多层构成，包括种子层， 从衬底侧依次形成第一中间层和第二中间层，构成第一中间层的晶粒在籽晶层的晶粒上外延生长，构成第二中间层的晶粒 在第一中间层的晶粒上外延生长，构成第二中间层的晶粒比构成第一中间层的晶粒更细。
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6.发明申请公开(公告)号：US20110111257A1
公开(公告)日：2011-05-12
申请号：US12674602
申请日：2008-08-25
IPC分类号： G11B5/33
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.
摘要翻译： 提供了一种磁记录介质，其可以通过保持磁记录层的垂直取向来记录和再现高密度信息，即使随着磁性晶粒的晶粒尺寸的减小，非磁性层从中间层到种晶层的厚度减小 与记录密度的增加一致。 还提供了其制造方法和磁记录和再现装置。 磁记录介质是至少包括下层，取向控制层，磁记录层和形成在非磁性基板上的保护层的垂直磁记录介质。 这里，取向控制层包括两层以上的种子层和从基板侧的中间层。 选择种子层和中间层的材料，使得中间层材料相对于无定形的种子层材料的接触角在10至100度的范围内。
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7.发明授权公开(公告)号：US08133601B2
公开(公告)日：2012-03-13
申请号：US12674602
申请日：2008-08-25
IPC分类号： G11B5/66
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium is provided which can record and reproduce high-density information by maintaining perpendicular orientation of a magnetic recording layer even with a decrease in thickness of nonmagnetic layers from an intermediate layer to a seed layer while decreasing the grain size of magnetic crystal grains to be consistent with an increase in recording density. A manufacturing method thereof and a magnetic recording and reproducing apparatus are also provided. The magnetic recording medium is a perpendicular magnetic recording medium including at least an underlying layer, an orientation control layer, a magnetic recording layer, and a protective layer formed on a nonmagnetic substrate. Here, the orientation control layer includes two or more layers of a seed layer and an intermediate layer from the substrate side. Materials of the seed layer and the intermediate layer are selected so that a contact angle of the intermediate layer material with respect to the seed layer material, which is amorphous, is in the range of 10 to 100 degrees.
摘要翻译： 提供了一种磁记录介质，其可以通过保持磁记录层的垂直取向来记录和再现高密度信息，即使随着磁性晶粒的晶粒尺寸的减小，非磁性层从中间层到种晶层的厚度减小 与记录密度的增加一致。 还提供了其制造方法和磁记录和再现装置。 磁记录介质是至少包括下层，取向控制层，磁记录层和形成在非磁性基板上的保护层的垂直磁记录介质。 这里，取向控制层包括两层以上的种子层和从基板侧的中间层。 选择种子层和中间层的材料，使得中间层材料相对于无定形的种子层材料的接触角在10至100度的范围内。
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8.发明申请公开(公告)号：US20100215991A1
公开(公告)日：2010-08-26
申请号：US12671452
申请日：2008-07-25
CPC分类号： G11B5/7325 , G11B5/82 , G11B5/851
摘要： A perpendicular magnetic recording medium is provided, which has a soft magnetic layer, a seed layer, a first intermediate layer, a second intermediate layer and a perpendicular magnetic recording layer, formed in this order on a non-magnetic substrate, and is characterized in that the seed layer is comprised of a (002) crystal plane-orientated hcp structure, the first intermediate layer is comprised of a (110) crystal plane-orientated bcc structure and the second intermediate layer is comprised of a (002) crystal plane-orientated hcp structure. The (110) crystal plane-orientated bcc structure comprises at least 60 atomic % of Cr. The magnetic recording medium has fine and well discrete magnetic crystal grains with extremely small size and exhibits good perpendicular orientation in the perpendicular magnetic recording layer, and thus, the medium is capable of recording and reproducing information with high density.
摘要翻译： 提供了一种垂直磁记录介质，其具有在非磁性基板上依次形成的软磁性层，种子层，第一中间层，第二中间层和垂直磁记录层，其特征在于 种子层由（002）晶面取向的hcp结构构成，第一中间层由（110）晶面定向的bcc结构构成，第二中间层由（002）晶面取向的hcp结构构成， 定向hcp结构。 （110）晶面取向的bcc结构包含至少60原子％的Cr。 磁记录介质具有极小尺寸的精细且分散的磁晶粒，并且在垂直磁记录层中呈现出良好的垂直取向，因此该介质能够以高密度记录和再现信息。
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