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1.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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2.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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3.发明授权公开(公告)号：US08623528B2
公开(公告)日：2014-01-07
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
IPC分类号： G11B5/66
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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4.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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公开(公告)号：US08142916B2
公开(公告)日：2012-03-27
申请号：US12594043
申请日：2008-03-28
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/66
摘要： Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (16), a nonmagnetic under layer (18), and a magnetic recording layer (22) on a substrate. The orientation control layer (16) has an fcc structure and a (111) plane parallel to the substrate. The under layer (18) has an hcp structure and a (0001) plane parallel to the substrate. An atomic distance of the (111) plane of the orientation control layer (16) is −0.2 Å to +0.15 Å to a lattice spacing of the under layer (18).
摘要翻译： 提供了通过进一步改善磁记录层的晶体取向，即使使用细小的磁性颗粒，仍然保持高S / N比和矫顽力（Hc）并且具有高记录密度的磁记录介质。 磁记录介质在基板上设置有取向控制层（16），非磁性底层（18）和磁记录层（22）。 取向控制层（16）具有fcc结构和平行于基板的（111）平面。 底层（18）具有hcp结构和平行于衬底的（0001）平面。 取向控制层（16）的（111）面的原子距离相对于下层（18）的晶格间距为-0.2到+0.15。
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6.发明申请公开(公告)号：US20100112379A1
公开(公告)日：2010-05-06
申请号：US12594092
申请日：2008-03-28
摘要： A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) atoms and carbon (C) atoms with a number ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of 1350 cm−1 is separated from G peak Gh appearing in the vicinity of 1520 cm−1 by the Gauss function.
摘要翻译： 垂直磁记录盘（100）包括基座（10），磁记录层（22）和介质保护层（26）。 磁记录层（22）是形成粒状部的粒状结构的铁磁层。 介质保护层（26）含有氮（N）原子和碳（C）原子，其数量比（N / C）在0.050至0.150的范围内。 在通过从其去除荧光的波长514.5nm的氩离子激光激发介质保护层（26）而获得的拉曼光谱中，峰值比Dh / Gh在0.70至0.95的范围内，当D峰 出现在1350cm-1附近的Dh通过高斯函数与在1520cm -1附近出现的G峰Gh分离。
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公开(公告)号：US20100209740A1
公开(公告)日：2010-08-19
申请号：US12666561
申请日：2008-09-26
IPC分类号： G11B5/706
摘要： [Object] The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR.[Means for Solution] A typical configuration of a perpendicular magnetic recording medium according to the present invention is a perpendicular magnetic recording medium 100 having a magnetic recording layer 122 with a granular structure in which non-magnetic grain boundary portions are formed between magnetic grains that have grown continuously in a columnar shape, wherein the grain boundary portions contain a plurality of kinds of oxides.
摘要翻译： 本发明提供一种垂直磁记录介质，其可以通过磁记录层中的磁性颗粒的进一步的尺寸减小和隔离来降低噪声，并且可以通过提高SNR来提高记录密度。 [解决方案]根据本发明的垂直磁记录介质的典型配置是具有具有粒状结构的磁记录层122的垂直磁记录介质100，其中在磁性颗粒之间形成非磁性晶界部分， 连续生长成柱状，其中晶界部分含有多种氧化物。
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8.发明申请公开(公告)号：US20100196740A1
公开(公告)日：2010-08-05
申请号：US12665271
申请日：2008-09-24
摘要： A perpendicular magnetic recording medium of the invention is characterized by having, on a disk substrate 110, a soft magnetic layer 14, a magnetic recording layer 22, a continuous layer 24 magnetically continuous in the in-plane direction of the substrate, a blocking layer 25 for blocking shock imposed on the continuous layer, and a medium protective layer 28 containing carbon formed on the blocking layer.
摘要翻译： 本发明的垂直磁记录介质的特征在于，在盘基板110上具有在基板的面内方向上磁连续的软磁层14，磁记录层22，连续层24，阻挡层 25，用于阻挡施加在连续层上的冲击，以及包含形成在阻挡层上的碳的介质保护层28。
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公开(公告)号：US08057926B2
公开(公告)日：2011-11-15
申请号：US12666561
申请日：2008-09-26
IPC分类号： G11B5/66
摘要： The present invention provides a perpendicular magnetic recording medium that can reduce noise by further size reduction and isolation of magnetic grains in a magnetic recording layer and can increase the recording density by improvement of the SNR. A typical configuration of a perpendicular magnetic recording medium according to the present invention is a perpendicular magnetic recording medium having a magnetic recording layer with a granular structure in which non-magnetic grain boundary portions are formed between magnetic grains that have grown continuously in a columnar shape, wherein the grain boundary portions contain a plurality of kinds of oxides.
摘要翻译： 本发明提供一种能够通过磁记录层中的磁性颗粒的进一步的尺寸减小和隔离来降低噪声的垂直磁记录介质，并且可以通过提高SNR来提高记录密度。 根据本发明的垂直磁记录介质的典型结构是具有具有颗粒结构的磁记录层的垂直磁记录介质，其中在磁性颗粒之间形成非磁性晶界部分，该磁性颗粒连续生长成柱状 其中，晶界部分含有多种氧化物。
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10.发明授权公开(公告)号：US08795857B2
公开(公告)日：2014-08-05
申请号：US12665271
申请日：2008-09-24
IPC分类号： G11B5/66
摘要： A perpendicular magnetic recording medium of the invention is characterized by having, on a disk substrate 110, a soft magnetic layer 14, a magnetic recording layer 22, a continuous layer 24 magnetically continuous in the in-plane direction of the substrate, a blocking layer 25 for blocking shock imposed on the continuous layer, and a medium protective layer 28 containing carbon formed on the blocking layer.
摘要翻译： 本发明的垂直磁记录介质的特征在于，在盘基板110上具有在基板的面内方向上磁连续的软磁层14，磁记录层22，连续层24，阻挡层 25，用于阻挡施加在连续层上的冲击，以及包含形成在阻挡层上的碳的介质保护层28。
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