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公开(公告)号：US08859118B2
公开(公告)日：2014-10-14
申请号：US12987704
申请日：2011-01-10
申请人： Toshiaki Tachibana , Takahiro Onoue
发明人： Toshiaki Tachibana , Takahiro Onoue
CPC分类号： G11B5/8404 , G11B5/66 , G11B5/7325 , G11B5/851
摘要： An object is to provide a perpendicular magnetic recording medium including a ground layer that prevents corrosion, while achieving a primary object of promoting finer magnetic particles of a magnetic recording layer and isolation of these magnetic particles.The structure of a perpendicular magnetic recording medium 100 according to the present invention includes, at least on a base 110: a magnetic recording layer 122 on which a signal is recorded; a ground layer 118 provided below the magnetic recording layer; a non-magnetic layer 116 for controlling crystal orientation of the ground layer; and a soft magnetic layer 114 provided below the non-magnetic layer. The ground layer 118 is configured to have three layers including, in an order from bottom, a first ground layer 118a and a second ground layer 118b that contain ruthenium, and a third ground layer 118c that contains a metal. A gas pressure at film formation by sputtering for the second ground layer 118b is the highest among those for the above three layers.
摘要翻译： 本发明的目的是提供一种包括防止腐蚀的接地层的垂直磁记录介质，同时实现促进磁记录层的更细的磁性颗粒和这些磁性颗粒的分离的主要目的。 根据本发明的垂直磁记录介质100的结构至少在基座110上：记录有信号的磁记录层122; 设置在磁记录层下方的接地层118; 用于控制接地层的晶体取向的非磁性层116; 以及设置在非磁性层下方的软磁性层114。 接地层118被配置为具有三层，其从底部开始依次包括含有钌的第一接地层118a和第二接地层118b，以及包含金属的第三接地层118c。 用于第二接地层118b的通过溅射成膜的气体压力在上述三层中的最高。
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2.发明申请公开(公告)号：US20110212346A1
公开(公告)日：2011-09-01
申请号：US13119057
申请日：2009-09-16
CPC分类号： G11B5/65 , G11B5/66 , G11B5/72 , G11B5/8408
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium the SNR of which is improved by reducing noise thought to be due to an auxiliary recording layer so that a higher recording density can be achieved, and a method of manufacturing the same.In order to achieve the above object, a representative configuration of a perpendicular magnetic recording medium 100 according to the present invention includes, on a base, at least a magnetic recording layer 122 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 124 disposed on the magnetic recording layer 122 and containing Ru and oxygen; and an auxiliary recording layer 126 that is disposed on the split layer 124 and that is magnetically approximately continuous in an in-plane direction of a main surface of the base 110.
摘要翻译： 本发明的目的是提供一种垂直磁记录介质，其通过降低由于辅助记录层而引起的噪声从而可以获得更高的记录密度来提高其SNR，及其制造方法。 为了实现上述目的，根据本发明的垂直磁记录介质100的代表性构造在基底上至少包括具有非磁性晶界部分为非晶粒边界部分的颗粒结构的磁记录层122 在柱状生长的晶体颗粒之间形成; 设置在磁记录层122上并含有Ru和氧的非磁性分离层124; 以及辅助记录层126，其设置在分离层124上，并且在基底110的主表面的面内方向上磁性近似连续。
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公开(公告)号：US08883249B2
公开(公告)日：2014-11-11
申请号：US12980062
申请日：2010-12-28
CPC分类号： G11B5/66 , C23C14/5806 , G11B5/65 , G11B5/84 , H01F1/06
摘要： By improving sliding durability while ensuring a high SNR, an improvement in reliability and a further increase in recording density are to be achieved.The structure of a method of manufacturing a perpendicular magnetic recording medium according to the present invention includes: a main recording layer forming step of forming, on a substrate, at least a main recording layer formed of magnetic particles having a CoCrPt alloy as a main component and a non-magnetic grain boundary part having an oxide as a main component; a split layer forming step of forming a split layer having a Ru alloy or a Co alloy as a main component on the main recording layer; a first heating step of performing a heat treatment on the substrate after the split layer forming step; an auxiliary recording layer forming step of forming an auxiliary recording layer formed of a material having CoCrPt as a main component after the first heating step; a second heating step of performing a heat treatment on the substrate after the auxiliary recording layer forming step; and a protective layer forming step of forming a protective layer having carbon as a main component by CVD after the second heating step.
摘要翻译： 通过提高滑动耐久性同时确保高SNR，可以实现可靠性的提高和记录密度的进一步提高。 根据本发明的垂直磁记录介质的制造方法的结构包括：主记录层形成步骤，在基板上至少形成由具有CoCrPt合金作为主要成分的磁性颗粒形成的主记录层 和具有氧化物作为主要成分的非磁性晶界部分; 在主记录层上形成具有Ru合金或Co合金作为主要成分的分割层的分割层形成步骤; 第一加热步骤，在所述分裂层形成步骤之后对所述基板进行热处理; 在第一加热步骤之后形成由具有CoCrPt作为主要成分的材料形成的辅助记录层的辅助记录层形成步骤; 在辅助记录层形成步骤之后对衬底进行热处理的第二加热步骤; 以及保护层形成步骤，在第二加热步骤之后通过CVD形成以碳为主要成分的保护层。
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公开(公告)号：US20110206947A1
公开(公告)日：2011-08-25
申请号：US12980062
申请日：2010-12-28
CPC分类号： G11B5/66 , C23C14/5806 , G11B5/65 , G11B5/84 , H01F1/06
摘要： By improving sliding durability while ensuring a high SNR, an improvement in reliability and a further increase in recording density are to be achieved.The structure of a method of manufacturing a perpendicular magnetic recording medium according to the present invention includes: a main recording layer forming step of forming, on a substrate, at least a main recording layer formed of magnetic particles having a CoCrPt alloy as a main component and a non-magnetic grain boundary part having an oxide as a main component; a split layer forming step of forming a split layer having a Ru alloy or a Co alloy as a main component on the main recording layer; a first heating step of performing a heat treatment on the substrate after the split layer forming step; an auxiliary recording layer forming step of forming an auxiliary recording layer formed of a material having CoCrPt as a main component after the first heating step; a second heating step of performing a heat treatment on the substrate after the auxiliary recording layer forming step; and a protective layer forming step of forming a protective layer having carbon as a main component by CVD after the second heating step.
摘要翻译： 通过提高滑动耐久性同时确保高SNR，可以实现可靠性的提高和记录密度的进一步提高。 根据本发明的垂直磁记录介质的制造方法的结构包括：主记录层形成步骤，在基板上至少形成由具有CoCrPt合金作为主要成分的磁性颗粒形成的主记录层 和具有氧化物作为主要成分的非磁性晶界部分; 在主记录层上形成具有Ru合金或Co合金作为主要成分的分割层的分割层形成步骤; 第一加热步骤，在所述分裂层形成步骤之后对所述基板进行热处理; 在第一加热步骤之后形成由具有CoCrPt作为主要成分的材料形成的辅助记录层的辅助记录层形成步骤; 在辅助记录层形成步骤之后对衬底进行热处理的第二加热步骤; 以及保护层形成步骤，在第二加热步骤之后通过CVD形成以碳为主要成分的保护层。
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5.发明授权公开(公告)号：US08871368B2
公开(公告)日：2014-10-28
申请号：US13119057
申请日：2009-09-16
IPC分类号： G11B5/66
CPC分类号： G11B5/65 , G11B5/66 , G11B5/72 , G11B5/8408
摘要： A perpendicular magnetic recording medium with SNR improved by reducing noise due to an auxiliary recording layer so that a higher recording density can be achieved. The perpendicular magnetic recording medium 100 includes a base, at least a magnetic recording layer 122 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 124 disposed on the magnetic recording layer 122 and containing Ru and oxygen; and an auxiliary recording layer 126 that is disposed on the split layer 124 and that is magnetically approximately continuous in an in-plane direction of a main surface of the base 110.
摘要翻译： 通过减少由于辅助记录层引起的噪声而提高SNR的垂直磁记录介质，从而可以实现更高的记录密度。 垂直磁记录介质100包括至少一个具有颗粒结构的磁记录层122，其中在以柱状形成的晶体颗粒之间形成非磁性晶界部分; 设置在磁记录层122上并含有Ru和氧的非磁性分离层124; 以及辅助记录层126，其设置在分离层124上，并且在基底110的主表面的面内方向上磁性近似连续。
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公开(公告)号：US09064518B2
公开(公告)日：2015-06-23
申请号：US13062640
申请日：2009-09-16
申请人： Takahiro Onoue , Teiichiro Umezawa
发明人： Takahiro Onoue , Teiichiro Umezawa
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium the SNR of which is further improved while a high coercive force Hc is secured so that a higher recoding density can be achieved.The structure of a perpendicular magnetic recording medium 100 according to the present invention includes, on a base, at least a first magnetic recording layer 122a 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 122b containing Ru disposed on the first magnetic layer; and a second magnetic recording layer 122c 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
摘要翻译： 本发明的目的是提供一种在保证高矫顽力Hc的同时进一步提高SNR的垂直磁记录介质，从而可以实现更高的记录密度。 根据本发明的垂直磁记录介质100的结构在基底上包括至少第一磁记录层122a，该第一磁记录层122a具有颗粒结构，其中在柱状生长的结晶颗粒之间形成非磁性晶界部分 形状; 包含设置在第一磁性层上的Ru的非磁性分离层122b; 以及第二磁记录层122c，其设置在分割层上，并且具有其中在柱状生长的晶体颗粒之间形成非磁性晶界部分的颗粒结构，其中第一磁性层和第二磁性层 含有形成晶界的氧化物，当第一磁性层的氧化物含量由A表示，第二磁性层的氧化物含量由B表示时，氧化物含量A / B的关系在 0.5
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公开(公告)号：US08895163B2
公开(公告)日：2014-11-25
申请号：US12751329
申请日：2010-03-31
申请人： Takahiro Onoue
发明人： Takahiro Onoue
CPC分类号： G11B5/667 , G11B5/66 , G11B5/7325 , G11B5/82
摘要： In a perpendicular magnetic recording medium having, over a substrate, a magnetic recording layer, an underlayer made of Ru or a Ru compound and provided below the magnetic recording layer, a pre-underlayer made of a nonmagnetic crystalline material, and a soft magnetic layer provided below the pre-underlayer, when the difference between the highest point and the lowest point of unevenness of the interface between the soft magnetic layer and the pre-underlayer, derived by a cross-sectional TEM image, is given as an interface roughness (nm) and the distance between the soft magnetic layer and the magnetic recording layer, excluding the soft magnetic layer and the magnetic recording layer, is given as a SUL-MAG distance (nm), interface roughness (nm)≦0.4 (nm) and interface roughness×SUL-MAG distance (nm)≦12 (nm) are satisfied.
摘要翻译： 在具有磁记录层，由Ru或Ru化合物制成并设置在磁记录层下方的基底上的垂直磁记录介质，由非磁性晶体材料制成的预底层和软磁层 设置在预底层下方，当通过横截面TEM图像导出的软磁性层和预底层之间的界面的最高点和最低点之间的差异作为界面粗糙度（ nm），软磁层和磁记录层之间的磁记录层之间的距离（SUL-MAG距离（nm），界面粗糙度（nm）＆nlE; 0.4（nm） 和界面粗糙度×SUL-MAG距离（nm）＆nlE; 12（nm）。
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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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9.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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10.发明申请公开(公告)号：US20090311557A1
公开(公告)日：2009-12-17
申请号：US12295562
申请日：2007-03-31
申请人： Takahiro Onoue , Kong Kim , Yoshiaki Sonobe , Chikara Takasu
发明人： Takahiro Onoue , Kong Kim , Yoshiaki Sonobe , Chikara Takasu
CPC分类号： G11B5/667 , G11B5/65 , G11B5/66 , G11B5/7325
摘要： [Object] To achieve a high coercive force (Hc) and low-noise characteristics (high S/N ratio) through realization of both segregation of SiO2 and high perpendicular magnetic anisotropy by providing a two-layer structure having magnetic recording layers with different properties.[Solution] A magnetic disk for use in perpendicular magnetic recording, having at least an underlayer 5, a first magnetic recording layer 6, and a second magnetic recording layer 7 on a substrate in this order. The first magnetic recording layer 6 and the second magnetic recording layer 7 are each a ferromagnetic layer of a granular structure containing a nonmagnetic substance forming grain boundary portions between crystal grains containing at least Co (cobalt). Given that the content of the nonmagnetic substance in the first magnetic recording layer 6 is A mol % and the content of the nonmagnetic substance in the second magnetic recording layer 7 is B mol %, A>B.
摘要翻译： [目的]通过提供具有不同性质的磁记录层的双层结构，通过实现SiO 2的偏析和高垂直磁各向异性来实现高矫顽力（Hc）和低噪声特性（高S / N比） 。 [解决方案]用于垂直磁记录的磁盘，其依次在基板上至少具有底层5，第一磁记录层6和第二磁记录层7。 第一磁记录层6和第二磁记录层7分别是包含在至少包含Co（钴）的晶粒之间形成晶界部分的非磁性物质的粒状结构的铁磁层。 假设第一磁记录层6中的非磁性物质的含量为A摩尔％，第二磁记录层7中的非磁性物质的含量为B摩尔％，则A> B。
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