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公开(公告)号：US20110311841A1
公开(公告)日：2011-12-22
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：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：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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公开(公告)号：US08453315B2
公开(公告)日：2013-06-04
申请号：US13071187
申请日：2011-03-24
申请人： Takenori Kajiwara , Tokichiro Sato
发明人： Takenori Kajiwara , Tokichiro Sato
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： A method for manufacturing a perpendicular magnetic disk 100 that includes a step of forming, 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. The method also includes a 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 step of heating the base formed with the auxiliary recording layer in a temperature range of 210 to 250° C.
摘要翻译： 一种垂直磁盘100的制造方法，其特征在于，包括：在基体110上形成通过以含有氧化物为主要成分的非磁性物质的分离形成晶界部的粒状磁性层160的工序 含有以柱状生长为主成分的CoCrPt合金的磁性粒子。 该方法还包括形成辅助记录层180的步骤，该辅助记录层180包含CoCrPtRu合金作为主要成分，并且在粒状磁性层之上具有1.5至4nm的膜厚度;以及加热由辅助记录形成的基底的步骤 层的温度范围为210〜250℃。
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公开(公告)号：US20120189872A1
公开(公告)日：2012-07-26
申请号：US13112323
申请日：2011-05-20
摘要： A perpendicular magnetic disk is provided. The disk includes, on a base and in the order from bottom, a first granular magnetic layer group including a plurality of magnetic layers each having a granular structure, a non-magnetic layer having Ru or a Ru alloy as a main component, a second granular magnetic layer group including a plurality of magnetic layers each having the granular structure, and an auxiliary recording layer having a CoCrPtRu alloy as a main component. Layers closer to a front surface among the plurality of magnetic layers included in the first granular magnetic layer group having an equal or smaller content of Pt. Layers closer to the front surface among the plurality of magnetic layers included in the second granular magnetic layer group having an equal or smaller content of Pt and having an equal or larger content of an oxide.
摘要翻译： 提供垂直磁盘。 该盘在基部上并且从底部开始依次包括具有粒状结构的多个磁性层的第一粒状磁性层组，具有Ru或Ru合金作为主要成分的非磁性层，第二 包括具有颗粒结构的多个磁性层的粒状磁性层组以及以CoCrPtRu合金为主要成分的辅助记录层。 更靠近Pt含量相同或更小的第一粒状磁性层组中包含的多个磁性层中的前表面。 在具有等于或更小含量的Pt并且具有相等或更大含量的氧化物的第二粒状磁性层组中包含的多个磁性层中更靠近前表面的层。
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公开(公告)号：US08431258B2
公开(公告)日：2013-04-30
申请号：US12749854
申请日：2010-03-30
IPC分类号： G11B5/66
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.
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公开(公告)号：US20120129009A1
公开(公告)日：2012-05-24
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： [Summary][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： [摘要]一个目的是使薄膜变薄，同时保持功能作为辅助记录层并增加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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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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公开(公告)号：US09240204B2
公开(公告)日：2016-01-19
申请号：US13112323
申请日：2011-05-20
摘要： A perpendicular magnetic disk is provided. The disk includes, on a base and in the order from bottom, a first granular magnetic layer group including a plurality of magnetic layers each having a granular structure, a non-magnetic layer having Ru or a Ru alloy as a main component, a second granular magnetic layer group including a plurality of magnetic layers each having the granular structure, and an auxiliary recording layer having a CoCrPtRu alloy as a main component. Layers closer to a front surface among the plurality of magnetic layers included in the first granular magnetic layer group having an equal or smaller content of Pt. Layers closer to the front surface among the plurality of magnetic layers included in the second granular magnetic layer group having an equal or smaller content of Pt and having an equal or larger content of an oxide.
摘要翻译： 提供垂直磁盘。 该盘在基部上并且从底部开始依次包括具有粒状结构的多个磁性层的第一粒状磁性层组，具有Ru或Ru合金作为主要成分的非磁性层，第二 包括具有颗粒结构的多个磁性层的粒状磁性层组以及以CoCrPtRu合金为主要成分的辅助记录层。 更靠近Pt含量相同或更小的第一粒状磁性层组中包含的多个磁性层中的前表面。 在具有等于或更小含量的Pt并且具有相等或更大含量的氧化物的第二粒状磁性层组中包含的多个磁性层中更靠近前表面的层。
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公开(公告)号：US20120070692A1
公开(公告)日：2012-03-22
申请号：US13048139
申请日：2011-03-15
申请人： Tokichiro Sato , Takenori Kajiwara
发明人： Tokichiro Sato , Takenori Kajiwara
IPC分类号： G11B5/33
CPC分类号： G11B5/7325
摘要： [Problem] To make a film thinner while keeping a function as an auxiliary recording layer, and improve an SNR and an overwrite characteristic.[Solution] A typical structure of a perpendicular magnetic disk according to the present invention includes, on a base, a granular magnetic layer 160 and an auxiliary recording layer 180 disposed on the granular magnetic layer 160. The granular magnetic layer 160 has a granular structure in which a grain boundary part is formed with segregation of a non-magnetic substance having an oxide as a main component around magnetic particles having a CoCrPt alloy a main component growing in a columnar shape. The auxiliary recording layer 180 has a CoCrPtRu alloy as a main component, and has a film thickness of 1.5 nm to 4.0 nm.
摘要翻译： [问题]在保持作为辅助记录层的功能的同时使薄膜更薄，并且提高SNR和覆盖特性。 [解决方案]根据本发明的垂直磁盘的典型结构在基体上包括设置在粒状磁性层160上的粒状磁性层160和辅助记录层180.粒状磁性层160具有粒状结构 其中晶界部分以具有生长为柱状的主要成分的CoCrPt合金的磁性颗粒周围的以氧化物为主要成分的非磁性物质的偏析形成。 辅助记录层180具有CoCrPtRu合金作为主要成分，并具有1.5nm至4.0nm的膜厚度。
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