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11.发明申请公开(公告)号：US20100247964A1
公开(公告)日：2010-09-30
申请号：US12749854
申请日：2010-03-30
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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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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13.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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公开(公告)号：US10083715B2
公开(公告)日：2018-09-25
申请号：US13149633
申请日：2011-05-31
CPC分类号： G11B5/65 , G11B5/7325 , G11B5/8404
摘要： A method of manufacturing a perpendicular magnetic disk comprises forming, on a base, a film of a first ground layer made of Ru or a Ru alloy at a first pressure, forming, on the first ground layer, a film of a second ground layer made of Ru or a Ru alloy at a second pressure higher than a first pressure, forming, on the second ground layer, a film of a third ground layer having Ru or a Ru alloy as a main component and an oxide as an accessory component at a third pressure higher than the first pressure and lower than the second pressure, and forming, on a layer above the third ground layer, a film of a granular magnetic layer in which a non-magnetic substance having an oxide is segregated around magnetic particles having an CoCrPt alloy grown in a columnar shape to form a grain boundary.
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