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公开(公告)号：US20160055874A1
公开(公告)日：2016-02-25
申请号：US14930229
申请日：2015-11-02
发明人： Koichi SHIMOKAWA , Katsushi HAMAKUBO , Kae ITOH
CPC分类号： G11B5/725 , C10M107/38 , C10M171/02 , C10M177/00 , C10M2213/003 , C10M2213/0606 , C10N2220/021 , C10N2230/06 , C10N2240/204 , C10N2250/14 , C10N2280/00 , G11B5/82 , G11B5/8408 , G11B5/86
摘要： A magnetic disk of is provided, the magnetic disk having at least a magnetic layer, a carbon protective layer, and a lubrication layer sequentially provided on a substrate. In an embodiment, the lubrication layer a film formed by a lubricant having a perfluoropolyether compound A having a perfluoropolyether main chain in the structure and also having a hydroxyl group at the end and a compound C obtained from a reaction between a compound B expressed by: [Chemical formula 1] CF3(—O—C2F4)m-(O—CF2)n-OCF3 [m and n in the formula are natural numbers.] and aluminum oxide.
摘要翻译： 提供一种磁盘，磁盘至少具有磁性层，碳保护层和顺序地设置在基板上的润滑层。 在一个实施方案中，润滑层由具有全氟聚醚化合物A的全氟聚醚化合物A在结构中具有全氟聚醚主链并且在末端具有羟基的润滑剂形成的膜和由化合物B之间的反应获得的化合物C表示： [化学式1] CF 3（-O-C 2 F 4）m - （O-CF 2）n OCF 3 [式中的m和n是自然数]和氧化铝。
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公开(公告)号：US20150262602A1
公开(公告)日：2015-09-17
申请号：US14724557
申请日：2015-05-28
发明人： TAKAHIRO ONOUE , TEIICHIRO UMEZAWA
摘要： Embodiments of a perpendicular magnetic recording medium include: a base; at least a first magnetic recording layer having a granular structure in which a non-magnetic grain boundary portion is formed between crystal particles grown in a columnar shape; a non-magnetic split layer containing Ru disposed on the first magnetic layer; and a second magnetic recording layer that is disposed on the split layer and that has a granular structure in which a non-magnetic grain boundary portion is formed between crystal particles grown in a columnar shape, wherein the first magnetic layer and the second magnetic layer contain oxides that form the grain boundary, and when an oxide content of the first magnetic layer is represented by A and an oxide content of the second magnetic layer is represented by B, a relationship between the oxide contents A/B is in the range of 0.5
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3.发明授权公开(公告)号：US09093100B2
公开(公告)日：2015-07-28
申请号：US13849176
申请日：2013-03-22
发明人： Junichi Yasumori , Yoshiaki Sonobe
摘要： A magnetic recording medium enabling excellent magnetic recording reproduction characteristics to be exhibited with the spacing loss reduced. The magnetic recording medium has a magnetic recording layer of a granular structure having nonmagnetic boundary portions between pillar-shaped magnetic particles on a nonmagnetic substrate, and an exchange coupling layer provided on the magnetic recording layer to add an action of exchange coupling the magnetic particles. Ion irradiation on the entire surface of the exchange coupling layer after layering the exchange coupling layer on the magnetic recording layer is performed.
摘要翻译： 能够显着地降低间隔损失的磁记录再现特性的磁记录介质。 磁记录介质具有在非磁性基板上的柱状磁性颗粒之间具有非磁性边界部分的粒状结构的磁记录层和设置在磁记录层上的交换耦合层，以增加磁性颗粒的交换作用。 执行在磁记录层上分层交换耦合层之后在交换耦合层的整个表面上的离子照射。
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4.发明申请公开(公告)号：US20140044992A1
公开(公告)日：2014-02-13
申请号：US14051414
申请日：2013-10-10
发明人： Takahiro ONOUE
摘要： A perpendicular magnetic recording medium 100 having a magnetic recording layer 122, wherein a particle diameter of crystal grains in layer 122 improves a SNR while a high coercive force is maintained. There also is at least a ground layer 118, a first magnetic recording layer 122a, and a second magnetic recording layer 122b in this order on a disk base 110. The first layer 122a and the second layer 122b are ferromagnetic layers, each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a columnar shape, and A
摘要翻译： 具有磁记录层122的垂直磁记录介质100，其中层122中的晶粒的粒径提高SNR，同时保持高的矫顽力。 在盘基座110上依次还有至少一个接地层118，第一磁记录层122a和第二磁记录层122b。第一层122a和第二层122b是铁磁性层，每层具有颗粒状 其中在以柱状形成的晶粒之间形成由非磁性物质制成的晶界部分的结构，并且当第一磁记录层122a中的晶粒的平均粒径为A时，A
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公开(公告)号：US20150027877A1
公开(公告)日：2015-01-29
申请号：US14514303
申请日：2014-10-14
发明人： CHIYO SAITO , TOKICHIRO SATO , TAKENORI KAJIWARA
摘要： Provided is a method of manufacturing a magnetic disk comprising a granular magnetic recording layer which causes less noise even with a recording capacity thereof of 250 G or more bits per square inch; and a method for manufacturing the same. The magnetic disk according to the present invention comprises: a granular magnetic recording layer (20) which is formed on a disk substrate 10 directly or via an intermediate layer and which has non-magnetic regions between granular columnar particles; and an auxiliary recording layer (22) which is formed on the granular magnetic recording layer 20 and which causes exchange interaction among the granular columnar particles, wherein the auxiliary recording layer (22) contains 0.1 to 3 moles of oxygen.
摘要翻译： 提供一种制造磁盘的方法，该磁盘包括粒状磁记录层，即使其记录容量为每平方英寸250G或更多位，也会产生较少的噪声; 及其制造方法。 根据本发明的磁盘包括：粒状磁记录层（20），其直接或经由中间层形成在盘基板10上，并且在颗粒状柱状颗粒之间具有非磁性区域; 和形成在颗粒状磁记录层20上并且引起颗粒状柱状颗粒之间的交换相互作用的辅助记录层（22），其中辅助记录层（22）含有0.1至3摩尔的氧。
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6.发明申请公开(公告)号：US20140011054A1
公开(公告)日：2014-01-09
申请号：US14020876
申请日：2013-09-08
发明人： Kouta SUZUKI
IPC分类号： G11B5/725
CPC分类号： G11B5/725 , C10M107/38 , C10M111/04 , C10M171/00 , C10M177/00 , C10M2213/0606 , C10M2223/003 , C10N2230/06 , C10N2230/66 , C10N2240/204 , C10N2250/14 , C10N2280/00 , G11B5/66 , G11B5/8408
摘要： A perpendicular magnetic recording medium, including a suitable lubricating layer with sufficient durability, moisture resistance, and contamination resistance and also maintaining an R/W characteristic. The perpendicular magnetic recording medium 100 includes a magnetic recording layer 122, a medium protective layer 126, and a lubricating layer 128 in this order on a base 110. The medium is made using a CF bond density measuring step of measuring a CF bond density of a lubricant; and a lubricating layer forming step of forming a lubricating layer with the lubricant when the measured CF bond density is 2.0×1022 to 2.7×1022 atoms/cm3.
摘要翻译： 垂直磁记录介质，包括具有足够的耐久性，耐湿性和耐污染性的合适的润滑层，并且还保持R / W特性。 垂直磁记录介质100在基座110上依次包括磁记录层122，介质保护层126和润滑层128.介质使用CF键密度测量步骤制成，该步骤是测量CF键密度 润滑剂 以及当测量的CF键密度为2.0×1022至2.7×1022原子/ cm3时，用润滑剂形成润滑层的润滑层形成步骤。
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7.发明授权公开(公告)号：US09183869B2
公开(公告)日：2015-11-10
申请号：US14051414
申请日：2013-10-10
发明人： Takahiro Onoue
摘要： A perpendicular magnetic recording medium 100 having a magnetic recording layer 122, wherein a particle diameter of crystal grains in layer 122 improves a SNR while a high coercive force is maintained. There also is at least a ground layer 118, a first magnetic recording layer 122a, and a second magnetic recording layer 122b in this order on a disk base 110. The first layer 122a and the second layer 122b are ferromagnetic layers, each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a columnar shape, and A
摘要翻译： 具有磁记录层122的垂直磁记录介质100，其中层122中的晶粒的粒径提高SNR，同时保持高的矫顽力。 在盘基座110上依次还有至少一个接地层118，第一磁记录层122a和第二磁记录层122b。第一层122a和第二层122b是铁磁性层，每层具有颗粒状 其中在以柱状形成的晶粒之间形成由非磁性物质制成的晶界部分的结构，并且当第一磁记录层122a中的晶粒的平均粒径为A时，A
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公开(公告)号：US20130216865A1
公开(公告)日：2013-08-22
申请号：US13849176
申请日：2013-03-22
发明人： Junichi YASUMORI , Yoshiaki SONOBE
IPC分类号： G11B5/66
摘要： A magnetic recording medium enabling excellent magnetic recording reproduction characteristics to be exhibited with the spacing loss reduced. The magnetic recording medium has a magnetic recording layer of a granular structure having nonmagnetic boundary portions between pillar-shaped magnetic particles on a nonmagnetic substrate, and an exchange coupling layer provided on the magnetic recording layer to add an action of exchange coupling the magnetic particles. Ion irradiation on the entire surface of the exchange coupling layer after layering the exchange coupling layer on the magnetic recording layer is performed
摘要翻译： 能够显着地降低间隔损失的磁记录再现特性的磁记录介质。 磁记录介质具有在非磁性基板上的柱状磁性颗粒之间具有非磁性边界部分的粒状结构的磁记录层和设置在磁记录层上的交换耦合层，以增加磁性颗粒的交换作用。 执行在磁记录层上分层交换耦合层之后在交换耦合层的整个表面上的离子照射
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9.发明授权公开(公告)号：US09142241B2
公开(公告)日：2015-09-22
申请号：US13868184
申请日：2013-04-23
CPC分类号： G11B5/8404 , G11B5/65 , G11B5/667 , G11B5/7325 , G11B5/82
摘要： A perpendicular magnetic recording medium comprises a magnetic recording layer that records a signal, an underlayer formed of Ru or Ru compound below the magnetic recording layer, a non-magnetic layer formed of a non-magnetic material below the underlayer to control crystal orientation of the underlayer, a soft magnetic layer provided below the non-magnetic layer, and a substrate on which the magnetic recording layer, the underlayer, the non-magnetic layer, and the soft magnetic layer are formed. The non-magnetic layer comprises a first non-magnetic layer formed above the soft magnetic layer and a second non-magnetic layer formed above the first non-magnetic layer. The first non-magnetic layer is formed of amorphous Ni compound while the second non-magnetic layer is formed of crystalline Ni or crystalline Ni compound.
摘要翻译： 垂直磁记录介质包括记录信号的磁记录层，在磁记录层下方由Ru或Ru化合物形成的底层，在底层下方由非磁性材料形成的非磁性层，以控制晶体取向 底层，设置在非磁性层下方的软磁性层以及形成有磁记录层，底层，非磁性层和软磁性层的基板。 非磁性层包括形成在软磁层上的第一非磁性层和形成在第一非磁性层之上的第二非磁性层。 第一非磁性层由非晶Ni化合物形成，而第二非磁性层由结晶的Ni或结晶的Ni化合物形成。
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