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公开(公告)号：US08142916B2
公开(公告)日：2012-03-27
申请号：US12594043
申请日：2008-03-28
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/66
摘要： Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (16), a nonmagnetic under layer (18), and a magnetic recording layer (22) on a substrate. The orientation control layer (16) has an fcc structure and a (111) plane parallel to the substrate. The under layer (18) has an hcp structure and a (0001) plane parallel to the substrate. An atomic distance of the (111) plane of the orientation control layer (16) is −0.2 Å to +0.15 Å to a lattice spacing of the under layer (18).
摘要翻译： 提供了通过进一步改善磁记录层的晶体取向，即使使用细小的磁性颗粒，仍然保持高S / N比和矫顽力（Hc）并且具有高记录密度的磁记录介质。 磁记录介质在基板上设置有取向控制层（16），非磁性底层（18）和磁记录层（22）。 取向控制层（16）具有fcc结构和平行于基板的（111）平面。 底层（18）具有hcp结构和平行于衬底的（0001）平面。 取向控制层（16）的（111）面的原子距离相对于下层（18）的晶格间距为-0.2到+0.15。
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公开(公告)号：US20120066896A1
公开(公告)日：2012-03-22
申请号：US13071187
申请日：2011-03-24
申请人： Takenori Kajiwara , Tokichiro Sato
发明人： Takenori Kajiwara , Tokichiro Sato
IPC分类号： G11B5/127
CPC分类号： G11B5/66 , C23C14/185 , C23C14/5806 , G11B5/656 , G11B5/84 , H01F10/123 , Y10T29/49021 , Y10T29/49025 , Y10T29/49027 , Y10T29/4903 , Y10T29/49032
摘要： An object of the invention is to achieve thinning while maintaining a function required for an auxiliary recording layer, thereby achieving improvement of SNR.A configuration of a method for manufacturing a perpendicular magnetic disk 100 according to the invention includes a granular magnetic layer forming step, on a base 110, a granular magnetic layer 160 in which a grain boundary portion is formed by segregation of a non-magnetic substance containing an oxide as a main component around magnetic particles containing a CoCrPt alloy grown in a columnar shape as a main component; an auxiliary recording layer forming step of forming an auxiliary recording layer 180 that contains a CoCrPtRu alloy as a main component and has a film thickness of 1.5 to 4 nm above the granular magnetic layer; and a heating step of heating the base formed with the auxiliary recording layer in a temperature range of 210 to 250° C.
摘要翻译： 本发明的目的是在保持辅助记录层所需的功能的同时实现变薄，从而实现SNR的提高。 根据本发明的用于制造垂直磁盘100的方法的结构包括：粒状磁性层形成步骤，在基底110上形成粒状磁性层160，其中通过非磁性物质的偏析形成晶界部分 包含氧化物作为主要成分的磁性颗粒周围，所述磁性颗粒包含以柱状生长为主要成分的CoCrPt合金; 辅助记录层形成步骤，形成包含CoCrPtRu合金作为主要成分并且在粒状磁性层之上的膜厚度为1.5至4nm的辅助记录层180; 以及在210〜250℃的温度范围内加热形成有辅助记录层的底座的加热步骤。
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13.发明申请公开(公告)号：US20100112379A1
公开(公告)日：2010-05-06
申请号：US12594092
申请日：2008-03-28
摘要： A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) atoms and carbon (C) atoms with a number ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of 1350 cm−1 is separated from G peak Gh appearing in the vicinity of 1520 cm−1 by the Gauss function.
摘要翻译： 垂直磁记录盘（100）包括基座（10），磁记录层（22）和介质保护层（26）。 磁记录层（22）是形成粒状部的粒状结构的铁磁层。 介质保护层（26）含有氮（N）原子和碳（C）原子，其数量比（N / C）在0.050至0.150的范围内。 在通过从其去除荧光的波长514.5nm的氩离子激光激发介质保护层（26）而获得的拉曼光谱中，峰值比Dh / Gh在0.70至0.95的范围内，当D峰 出现在1350cm-1附近的Dh通过高斯函数与在1520cm -1附近出现的G峰Gh分离。
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公开(公告)号：US08877359B2
公开(公告)日：2014-11-04
申请号：US13133124
申请日：2009-12-07
申请人： Chiyo Saito , Tokichiro Sato , Takenori Kajiwara
发明人： Chiyo Saito , Tokichiro Sato , Takenori Kajiwara
摘要： Provided are 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： 提供一种磁盘，其包括粒状磁记录层，即使其记录容量为每平方英寸250G或更多位，也会产生较小的噪声; 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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公开(公告)号：US08828566B2
公开(公告)日：2014-09-09
申请号：US13112433
申请日：2011-05-20
申请人： Tokichiro Sato , Takenori Kajiwara
发明人： Tokichiro Sato , Takenori Kajiwara
IPC分类号： G11B5/66
CPC分类号： G11B5/66
摘要： [Problem] An object is to make a film thinner while keeping the function as an auxiliary recording layer and increase an SNR.[Solution] A structure of the perpendicular magnetic disk 100 according to the present invention includes, on a base 110, a granular magnetic layer 160 and an auxiliary recording layer 180 disposed above the granular magnetic layer, the granular magnetic layer having a granular structure in which a non-magnetic substance having an oxide as a main component is segregated around magnetic particles having a CoCrPt alloy as a main ingredient growing in a columnar shape to form a grain boundary part, and the auxiliary recording layer having a CoCrPtRu alloy as a main component and further containing, as a accessory component, a metal forming passivity and not being an antiferromagnet.
摘要翻译： [问题]一个目的是使薄膜更薄，同时保持作为辅助记录层的功能并增加SNR。 [解决方案]根据本发明的垂直磁盘100的结构在基体110上包括设置在粒状磁性层上方的粒状磁性层160和辅助记录层180，该颗粒状磁性层具有粒状结构 其以氧化物为主要成分的非磁性物质以围绕作为主要成分的CoCrPt合金的磁性颗粒围绕形成晶界部分而分离，并且具有CoCrPtRu合金作为主要的辅助记录层 作为辅助成分进一步含有被形成金属的物质，而不是反铁磁体。
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16.发明授权公开(公告)号：US08795857B2
公开(公告)日：2014-08-05
申请号：US12665271
申请日：2008-09-24
IPC分类号： G11B5/66
摘要： A perpendicular magnetic recording medium of the invention is characterized by having, on a disk substrate 110, a soft magnetic layer 14, a magnetic recording layer 22, a continuous layer 24 magnetically continuous in the in-plane direction of the substrate, a blocking layer 25 for blocking shock imposed on the continuous layer, and a medium protective layer 28 containing carbon formed on the blocking layer.
摘要翻译： 本发明的垂直磁记录介质的特征在于，在盘基板110上具有在基板的面内方向上磁连续的软磁层14，磁记录层22，连续层24，阻挡层 25，用于阻挡施加在连续层上的冲击，以及包含形成在阻挡层上的碳的介质保护层28。
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17.发明授权公开(公告)号：US08404370B2
公开(公告)日：2013-03-26
申请号：US12751237
申请日：2010-03-31
IPC分类号： G11B5/66
摘要： A perpendicular magnetic recording medium 100 has, over a substrate, at least a magnetic recording layer 122 with a granular structure in which nonmagnetic grain boundaries are formed between magnetic grains continuously grown into a columnar shape. The magnetic grains of the magnetic recording layer 122 contain Co, Cr, and Pt. The magnetic recording layer 122 contains at least one oxide selected from a group A including SiO2, TiO2, and Cr2O3, at least one oxide selected from a group B consisting of oxides each having a larger Gibbs free energy ΔG than the group A, and a reducing agent adapted to reduce the oxides of the group B.
摘要翻译： 垂直磁记录介质100在衬底上具有至少具有粒状结构的磁记录层122，其中在连续生长成柱状的磁性颗粒之间形成非磁性晶界。 磁记录层122的磁性颗粒含有Co，Cr和Pt。 磁记录层122包含选自包括SiO 2，TiO 2和Cr 2 O 3的组A中的至少一种氧化物，选自B组的氧化物中的至少一种氧化物，其组分比A组具有更大的Gibbs自由能＆Dgr; G， 以及适合于还原B族氧化物的还原剂。
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18.发明授权公开(公告)号：US08309239B2
公开(公告)日：2012-11-13
申请号：US12594092
申请日：2008-03-28
IPC分类号： G11B5/66
摘要： A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) atoms and carbon (C) atoms with a number ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of 1350 cm−1 is separated from G peak Gh appearing in the vicinity of 1520 cm−1 by the Gauss function.
摘要翻译： 垂直磁记录盘（100）包括基座（10），磁记录层（22）和介质保护层（26）。 磁记录层（22）是形成粒状部的粒状结构的铁磁层。 介质保护层（26）含有氮（N）原子和碳（C）原子，其数量比（N / C）在0.050至0.150的范围内。 在通过从其去除荧光的波长514.5nm的氩离子激光激发介质保护层（26）而获得的拉曼光谱中，峰值比Dh / Gh在0.70至0.95的范围内，当D峰 出现在1350cm-1附近的Dh通过高斯函数与在1520cm -1附近出现的G峰Gh分离。
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公开(公告)号：US20100119878A1
公开(公告)日：2010-05-13
申请号：US12594043
申请日：2008-03-28
IPC分类号： G11B5/706
CPC分类号： G11B5/7325 , G11B5/66
摘要： Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (16), a nonmagnetic under layer (18), and a magnetic recording layer (22) on a substrate. The orientation control layer (16) has an fcc structure and a (111) plane parallel to the substrate. The under layer (18) has an hcp structure and a (0001) plane parallel to the substrate. An atomic distance of the (111) plane of the orientation control layer (16) is −0.2 Å to +0.15 Å to a lattice spacing of the under layer (18).
摘要翻译： 提供了通过进一步改善磁记录层的晶体取向，即使使用细小的磁性颗粒，仍然保持高S / N比和矫顽力（Hc）并且具有高记录密度的磁记录介质。 磁记录介质在基板上设置有取向控制层（16），非磁性底层（18）和磁记录层（22）。 取向控制层（16）具有fcc结构和平行于基板的（111）平面。 底层（18）具有hcp结构和平行于衬底的（0001）平面。 取向控制层（16）的（111）面的原子距离相对于下层（18）的晶格间距为-0.2到+0.15。
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公开(公告)号：US08865327B2
公开(公告)日：2014-10-21
申请号：US13048139
申请日：2011-03-15
申请人： Tokichiro Sato , Takenori Kajiwara
发明人： Tokichiro Sato , Takenori Kajiwara
CPC分类号： G11B5/7325
摘要： A perpendicular magnetic disk that includes, on a base, a soft magnetic layer, an amorphous alloy layer, a preliminary ground layer provided on the amorphous alloy layer, a ground layer formed of Ru or a Ru-type alloy having an hcp crystal structure provided on the preliminary ground layer. A granular magnetic layer is provided on the ground layer. The amorphous alloy layer contains Ta, and the preliminary ground layer includes a first preliminary ground layer formed of Ti or a Ti alloy of microcrystals and a second preliminary ground layer formed of a Ni-type alloy of an fcc crystal structure.
摘要翻译： 一种垂直磁盘，其在基底上包括软磁性层，非晶合金层，设置在非晶合金层上的预备接地层，由Ru形成的接地层或提供具有hcp晶体结构的Ru型合金 在初步地层。 在地层上提供粒状磁性层。 非晶合金层含有Ta，预备接地层包括由Ti或微晶Ti合金形成的第一预备接地层和由fcc晶体结构的Ni型合金形成的第二预接地层。
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