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1.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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2.发明申请公开(公告)号：US20090117408A1
公开(公告)日：2009-05-07
申请号：US12295573
申请日：2007-03-31
CPC分类号： G11B5/66 , G11B5/65 , G11B5/667 , G11B5/7325
摘要： To provide a perpendicular magnetic recording disk having a film structure that improves overwrite characteristics (O/W) while maintaining a coercive force (Hc) high enough not to affect heat fluctuation resistance, and a manufacturing method thereof.A magnetic disk for use in perpendicular magnetic recording, having at least an underlayer, a first magnetic recording layer, and a second magnetic recording layer on a substrate in the order named, characterized in that the first magnetic recording layer and the second magnetic recording layer 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) and, given that the content of the nonmagnetic substance in the first magnetic recording layer is A mol % and the content of the nonmagnetic substance in the second magnetic recording layer is B mol %, A
摘要翻译： 提供一种具有提高覆盖特性（O / W）的膜结构的垂直磁记录盘及其制造方法，同时保持矫顽力（Hc）足够高以不影响耐热波动性。 一种用于垂直磁记录的磁盘，其特征在于，具有至少下层，第一磁记录层和第二磁记录层，其特征在于，第一磁记录层和第二磁记录层 分别是含有形成至少包含Co（钴）的晶粒之间的晶界部分的非磁性物质的粒状结构的铁磁层，并且考虑到第一磁记录层中的非磁性物质的含量为A摩尔％，含量 的第二磁记录层中的非磁性物质为B摩尔％，A
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公开(公告)号：US20090191331A1
公开(公告)日：2009-07-30
申请号：US12295550
申请日：2007-03-31
申请人： Teiichiro Umezawa , Takahiro Onoue , Chikara Takasu , Kong Kim
发明人： Teiichiro Umezawa , Takahiro Onoue , Chikara Takasu , Kong Kim
IPC分类号： B05D5/12
摘要： [Object] To provide a manufacturing method that can easily enhance a reversed domain nucleation magnetic field of a magnetic recording layer in a perpendicular magnetic recording medium having, over a substrate, a soft magnetic layer, the magnetic recording layer having a granular structure, and a continuous layer having a high perpendicular magnetic anisotropy.[Solution] A perpendicular magnetic recording medium manufacturing method according to this invention is characterized by including a soft magnetic layer forming step of forming a soft magnetic layer over a substrate, a magnetic recording layer forming step of forming a magnetic recording layer having a granular structure as an upper layer of the soft magnetic layer, a continuous layer forming step of forming a continuous layer having a perpendicular magnetic anisotropy as an upper layer or a lower layer of the magnetic recording layer, and a heating step of heating a medium, obtained by forming the continuous layer in the continuous layer forming step, for improving a value of a reversed domain nucleation magnetic field.
摘要翻译： 本发明提供一种能够容易地增强磁性记录层的反磁畴成核磁场的制造方法，该垂直磁记录介质在基板上具有软磁性层，具有粒状结构的磁记录层，以及 具有高垂直磁各向异性的连续层。 [解决方案]根据本发明的垂直磁记录介质制造方法的特征在于包括在基板上形成软磁性层的软磁性层形成步骤，形成具有粒状结构的磁记录层的磁记录层形成步骤 作为软磁性层的上层，形成具有垂直磁各向异性的连续层作为磁记录层的上层或下层的连续层形成步骤和加热介质的加热步骤，其通过 在连续层形成步骤中形成连续层，以改善反向畴状成核磁场的值。
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4.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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5.发明申请公开(公告)号：US20100021768A1
公开(公告)日：2010-01-28
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
摘要： [PROBLEMS] To improve the track density by reducing the track edge noise and sharpening the boundaries of a recording magnetic field by blocking the recording magnetic field spreading outside the recording region in magnetic recording.[MEANS FOR SOLVING PROBLEMS] 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： [问题]通过在磁记录中阻挡记录磁场外的记录磁场扩展，通过减小轨道边缘噪声和锐化记录磁场的边界来提高轨道密度。 解决问题的手段磁记录介质（10）具有在基板（12）上形成的基板（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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6.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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7.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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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：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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