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1.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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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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3.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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4.发明授权公开(公告)号：US09159351B2
公开(公告)日：2015-10-13
申请号：US12738201
申请日：2008-10-14
申请人： Kazuaki Sakamoto , Kong Kim , Takahiro Onoue , Masafumi Ishiyama , Teiichiro Umezawa , Kenji Ayama
发明人： Kazuaki Sakamoto , Kong Kim , Takahiro Onoue , Masafumi Ishiyama , Teiichiro Umezawa , Kenji Ayama
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325
摘要： A perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, a pre-underlayer, an underlayer, and a main recording layer serving as a magnetic recording layer. The pre-underlayer contains seed crystal grains that serve as a base for crystal grains of the underlayer, and an addition substance that is added between the seed crystal grains and composed of an element having an atomic radius smaller than that of an element forming the seed crystal grains.
摘要翻译： 垂直磁记录介质包括基板，软磁层，预底层，底层和用作磁记录层的主记录层。 预底层包含用作底层晶粒的基底的籽晶粒，以及添加在籽晶粒之间并由原子半径小于形成种子的元素的元素构成的添加物质 晶粒。
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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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6.发明授权公开(公告)号：US08076013B2
公开(公告)日：2011-12-13
申请号：US12526866
申请日：2008-02-13
申请人： Yoshiaki Sonobe , Takahiro Onoue , Koichi Wago
发明人： Yoshiaki Sonobe , Takahiro Onoue , Koichi Wago
IPC分类号： G11B5/667
摘要： A magnetic recording medium (10) has a substrate (12) and a perpendicular magnetic recording layer (30) formed over the substrate (12). The perpendicular magnetic recording layer (30) has a granular layer (20) in which a magnetic signal is recorded and a continuous film layer (24) magnetically coupled to the granular layer (20). The continuous film layer (24) has hard magnetic portions (204) formed in positions corresponding to the recording regions where magnetic signals are recorded in the granular layer (20) and magnetic shield portions (202) formed between the hard magnetic portions (204), each having a magnetization curve whose slope is larger than those of the hard magnetic portions in the region where the applied magnetic filed is zero when the magnetization curve is measured, and each having a residual magnetic polarization smaller than those in the hard magnetic portions.
摘要翻译： 磁记录介质（10）具有形成在基板（12）上的基板（12）和垂直磁记录层（30）。 垂直磁记录层（30）具有其中记录有磁信号的粒状层（20）和磁性耦合到粒状层（20）的连续膜层（24）。 连续薄膜层（24）具有形成在磁性信号被记录在粒状层（20）中的记录区域对应的位置上的硬磁性部分（204）和形成在硬磁性部分（204）之间的磁屏蔽部分（202） 每个磁化曲线在测量磁化曲线时具有比施加的磁场为零的区域中的硬磁性部分的斜率大的磁化曲线，并且每个磁化曲线的残余磁极化小于硬磁性部分中的残余磁极化。
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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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8.发明申请公开(公告)号：US20110111262A1
公开(公告)日：2011-05-12
申请号：US12934975
申请日：2009-03-25
申请人： Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
发明人： Teiichiro Umezawa , Masafumi Ishiyama , Tokichiro Sato , Kenji Ayama , Takahiro Onoue , Junichi Horikawa
摘要： An object of the present invention is to provide a method of manufacturing a perpendicular magnetic recording medium (100) in which both of a coercive force Hc and reliability can be achieved at a higher level even with heating at the time of forming a medium protective layer (126) and to provide the perpendicular magnetic recording medium (100). Thus, in a typical structure of the present invention, in the method of manufacturing the perpendicular magnetic recording medium (100) including at least a magnetic recording layer (122b), which is a ferromagnetic layer of a granular structure in which a non-magnetic grain boundary part is formed between crystal grains each grown in a columnar shape, and a medium protective layer (126) with carbon hydride as a main component in this order on a disk base (110), the method includes a magnetic recording layer forming step of forming the magnetic recording layer (122b) so that the grain boundary part contains oxides of a plurality of types and a medium protective layer forming step of forming the medium protective layer (126) in a state where the disk base (110) having the magnetic recording layer (122b) formed thereon is heated at 160 to 200 degrees Celsius.
摘要翻译： 本发明的目的是提供一种制造垂直磁记录介质（100）的方法，其中即使在形成介质保护层时加热也可以在更高的水平上实现矫顽力Hc和可靠性 （126）并提供垂直磁记录介质（100）。 因此，在本发明的典型结构中，在制造至少包括磁记录层（122b）的垂直磁记录介质（100）的制造方法中，所述磁记录层是粒状结构的铁磁层，其中非磁性 在圆盘基体（110）上依次形成以圆柱状生长的晶粒和碳氢化合物作为主要成分的介质保护层（126）之间的晶界部分，该方法包括磁记录层形成步骤 形成磁记录层（122b），使得晶界部分包含多种类型的氧化物和形成介质保护层（126）的介质保护层形成步骤，所述介质保护层形成步骤处于具有 在其上形成的磁记录层（122b）在160至200摄氏度下被加热。
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9.发明申请VERTICAL MAGNETIC RECORDING MEDIUM AND METHOD FOR MAKING VERTICAL MAGNETIC RECORDING MEDIUM 有权垂直磁记录介质及制作垂直磁记录介质的方法公开(公告)号：US20110097600A1
公开(公告)日：2011-04-28
申请号：US12934935
申请日：2009-03-26
申请人： Takahiro Onoue
发明人： Takahiro Onoue
摘要： An object of the present invention is to provide a perpendicular magnetic recording medium 100 including a magnetic recording layer 122, the medium in which a particle diameter of crystal grains in the magnetic recording layer 122 of a two-layer structure is so designed as to improve an SNR while a high coercive force is maintained. In a method of manufacturing the perpendicular magnetic recording medium 100 according to the present invention, the perpendicular magnetic recording medium 100 includes at least a ground layer 118, a first magnetic recording layer 122a, and a second magnetic recording layer 122b in this order on a disk base 110; the first magnetic recording layer 122a and the second magnetic recording layer 122b are ferromagnetic layers each having a granular structure in which a grain boundary part made of a non-magnetic substance is formed between crystal grains each grown in a columnar shape, and A
摘要翻译： 本发明的目的是提供一种垂直磁记录介质100，其包括磁记录层122，其中两层结构的磁记录层122中的晶粒的粒径被设计成改进的介质 在维持高矫顽力的情况下的SNR。 在制造根据本发明的垂直磁记录介质100的方法中，垂直磁记录介质100至少包括接地层118，第一磁记录层122a和第二磁记录层122b 磁盘基座110; 第一磁记录层122a和第二磁记录层122b是具有颗粒结构的铁磁性层，其中在以柱状形成的晶粒之间形成由非磁性物质形成的晶界部分，A
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10.发明申请公开(公告)号：US20100279151A1
公开(公告)日：2010-11-04
申请号：US12738201
申请日：2008-10-14
申请人： Kazuaki Sakamoto , Kong Kim , Takahiro Onoue , Masafumi Ishiyama , Teiichiro Umezawa , Kenji Ayama
发明人： Kazuaki Sakamoto , Kong Kim , Takahiro Onoue , Masafumi Ishiyama , Teiichiro Umezawa , Kenji Ayama
CPC分类号： G11B5/732 , G11B5/66 , G11B5/7325
摘要： A perpendicular magnetic recording medium includes a substrate, a soft magnetic layer, a pre-underlayer, an underlayer, and a main recording layer serving as a magnetic recording layer. The pre-underlayer contains seed crystal grains that serve as a base for crystal grains of the underlayer, and an addition substance that is added between the seed crystal grains and composed of an element having an atomic radius smaller than that of an element forming the seed crystal grains.
摘要翻译： 垂直磁记录介质包括基板，软磁层，预底层，底层和用作磁记录层的主记录层。 预底层包含用作底层晶粒的基底的籽晶粒，以及添加在籽晶粒之间并由原子半径小于形成种子的元素的元素构成的添加物质 晶粒。
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