公开(公告)号：US20120207919A1

公开(公告)日：2012-08-16

申请号：US13149633

申请日：2011-05-31

申请人： KAZUAKI SAKAMOTO ,  TAKENORI KAJIWARA

发明人： KAZUAKI SAKAMOTO ,  TAKENORI KAJIWARA

IPC分类号： B05D3/00

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.

摘要翻译： 一种制造垂直磁盘的方法包括在第一压力下在基底上形成由Ru或Ru合金制成的第一接地层的膜，在第一接地层上形成第二接地层的膜， 在高于第一压力的第二压力下的Ru或Ru合金，在第二接地层上形成具有Ru或Ru合金作为主要成分的第三接地层的膜，以及作为辅助成分的氧化物 第三压力高于第一压力并低于第二压力，并且在第三接地层上方的层上形成粒状磁性层的膜，其中具有氧化物的非磁性物质围绕具有氧化物的磁性颗粒分离 CoCrPt合金以柱状生长形成晶界。

公开(公告)号：US20120141835A1

公开(公告)日：2012-06-07

申请号：US13149659

申请日：2011-05-31

申请人： KAZUAKI SAKAMOTO

发明人： KAZUAKI SAKAMOTO

IPC分类号： G11B5/66

CPC分类号： G11B5/7325

摘要： [Problem] A perpendicular magnetic disk with an improved SNR and increased recording density by further advancing microfabrication and uniformalization of particle diameters and improving crystal orientation regarding a preliminary ground layer made of a Ni-base alloy is provided.[Solution] The perpendicular magnetic disk includes: on a base 110, a first Ni alloy layer 142 and a second Ni alloy layer 144; a ground layer 150 having Ru as a main component; and a perpendicular magnetic recording layer 160 containing a CoPt-base alloy and an oxide in this order, the first Ni alloy layer 142 and the second Ni alloy layer 144 including at least one element that takes a bcc crystal structure as a simple substance, and the second Ni alloy layer 144 further including an oxide.

摘要翻译： [问题]提供了一种通过进一步推进微细加工和粒径均匀化并改善由Ni基合金制成的预备接地层的晶体取向而提高SNR并提高记录密度的垂直磁盘。 [解决方案]垂直磁盘包括：在基座110上，第一Ni合金层142和第二Ni合金层144; 具有Ru作为主要成分的接地层150; 以及依次包含CoPt基合金和氧化物的垂直磁记录层160，包含至少一种以bcc晶体结构为单体的元素的第一Ni合金层142和第二Ni合金层144，以及 第二Ni合金层144还包括氧化物。

公开(公告)号：US20120141833A1

公开(公告)日：2012-06-07

申请号：US13149613

申请日：2011-05-31

申请人： TEIICHIRO UMEZAWA ,  KAZUAKI SAKAMOTO

发明人： TEIICHIRO UMEZAWA ,  KAZUAKI SAKAMOTO

IPC分类号： G11B5/667 ,  B32B15/04 ,  G11B5/82 ,  B82Y30/00

CPC分类号： G11B5/7325

摘要： [Problem] A perpendicular magnetic disk with an improved SNR and an increased recording density by further improving crystal orientation of a preliminary ground layer formed of an Ni-base alloy is provided.[Solution] A typical structure of the perpendicular magnetic disk according to the present invention includes, on a base 110, a soft magnetic layer 130, a Ta alloy layer 140 provided on the soft magnetic layer 130, an Ni alloy layer 142 provided on the Ta alloy layer 140, a ground layer 150 provided on the Ni alloy layer 142 and having Ru as a main component, and a granular magnetic layer 160 provided on the ground layer 150. The Ta alloy layer 140 is a layer containing 10 atomic percent or more and 45 atomic percent or less Ta and having amorphous and soft magnetic properties.

摘要翻译： [问题]提供了通过进一步改善由Ni基合金形成的预备接地层的晶体取向而具有改善的SNR和增加的记录密度的垂直磁盘。 [解决方案]根据本发明的垂直磁盘的典型结构在基底110上包括软磁层130，设置在软磁层130上的Ta合金层140，设置在软磁层130上的Ni合金层142 Ta合金层140，设置在Ni合金层142上并具有Ru作为主要成分的接地层150和设置在接地层150上的粒状磁性层160.Ta合金层140是含有10原子％或 多于45原子％或更少的Ta，并具有无定形和软磁性能。