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公开(公告)号：US20090081483A1
公开(公告)日：2009-03-26
申请号：US11909598
申请日：2006-03-20
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Kong Kim , Masaki Uemura
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Kong Kim , Masaki Uemura
CPC分类号： G11B5/7325 , G11B5/66
摘要： A magnetic disk 10 for use in perpendicular magnetic recording, which includes an underlayer 18, a size-reduction promoting layer 20 (nonmagnetic granular layer) of a granular structure, and a magnetic recording layer 22 having a ferromagnetic layer 32 of a granular structure. The size-reduction promoting layer 20 has an inorganic oxide matrix and nonmagnetic metal crystal grains and is disposed between the underlayer 18 and the ferromagnetic layer 32, thereby reducing the size of magnetic crystal grains in the ferromagnetic layer 32.
摘要翻译： 用于垂直磁记录的磁盘10，其包括底层18，粒状结构的尺寸减小促进层20（非磁性粒状层）和具有粒状结构的铁磁层32的磁记录层22。 尺寸减小促进层20具有无机氧化物基体和非磁性金属晶粒，并且设置在底层18和铁磁层32之间，从而减小铁磁层32中的磁晶粒的尺寸。
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公开(公告)号：US08003237B2
公开(公告)日：2011-08-23
申请号：US11909598
申请日：2006-03-20
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Kong Kim , Masaki Uemura
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Kong Kim , Masaki Uemura
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/66
摘要： A magnetic disk 10 for use in perpendicular magnetic recording, which includes an underlayer 18, a size-reduction promoting layer 20 (nonmagnetic granular layer) of a granular structure, and a magnetic recording layer 22 having a ferromagnetic layer 32 of a granular structure. The size-reduction promoting layer 20 has an inorganic oxide matrix and nonmagnetic metal crystal grains and is disposed between the underlayer 18 and the ferromagnetic layer 32, thereby reducing the size of magnetic crystal grains in the ferromagnetic layer 32.
摘要翻译： 用于垂直磁记录的磁盘10，其包括底层18，粒状结构的尺寸减小促进层20（非磁性粒状层）和具有粒状结构的铁磁层32的磁记录层22。 尺寸减小促进层20具有无机氧化物基体和非磁性金属晶粒，并且设置在底层18和铁磁层32之间，从而减小铁磁层32中的磁晶粒的尺寸。
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3.发明授权公开(公告)号：US07955723B2
公开(公告)日：2011-06-07
申请号：US11887539
申请日：2006-03-27
申请人： Teiichiro Umezawa , Yoshiaki Sonobe , Kong Kim
发明人： Teiichiro Umezawa , Yoshiaki Sonobe , Kong Kim
CPC分类号： G11B5/667
摘要： A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall.
摘要翻译： 一种垂直磁记录介质，包括通过非磁性层层叠并且反平行耦合并且设置在非磁性基板和磁记录层之间的一对软磁性层，其中尖峰噪声和介质噪声 当以高记录表面密度进行信息记录和再现时，可以被积极地抑制。 至少一对软磁性层通过非磁性材料的基板上的非磁性层铺设并形成，使得通过对该一对软磁性层的积分而获得的磁特性具有磁滞，从而防止形成 磁畴壁。
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4.发明申请公开(公告)号：US20100203358A1
公开(公告)日：2010-08-12
申请号：US11887539
申请日：2006-03-27
申请人： Teiichiro Umezawa , Yoshiaki Sonobe , Kong Kim
发明人： Teiichiro Umezawa , Yoshiaki Sonobe , Kong Kim
IPC分类号： G11B5/706
CPC分类号： G11B5/667
摘要： A perpendicular magnetic recording medium comprising a pair of soft magnetic layers that are laminated via a non-magnetic layer and antiparallel-coupled to each other and that are provided between a non-magnetic substrate and a magnetic recording layer, wherein spike noise and medium noise can be positively suppressed when information recording and reproduction are carried out at high recording surface density. At least one pair of soft magnetic layers are laid and formed via a non-magnetic layer on a substrate of a non-magnetic material so that magnetic characteristics obtained by integrating the pair of soft magnetic layers have a magnetic hysteresis to thereby prevent the formation of a magnetic domain wall.
摘要翻译： 一种垂直磁记录介质，包括通过非磁性层层叠并且反平行耦合并且设置在非磁性基板和磁记录层之间的一对软磁性层，其中尖峰噪声和介质噪声 当以高记录表面密度进行信息记录和再现时，可以被积极地抑制。 至少一对软磁性层通过非磁性材料的基板上的非磁性层铺设并形成，使得通过对该一对软磁性层的积分而获得的磁特性具有磁滞，从而防止形成 磁畴壁。
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5.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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6.发明授权Magnetic recording medium and method for manufacturing magnetic recording medium 有权磁记录介质及磁记录介质的制造方法公开(公告)号：US07833639B2
公开(公告)日：2010-11-16
申请号：US11862789
申请日：2007-09-27
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
IPC分类号： G11B5/66
摘要： A magnetic recording medium for perpendicular magnetic recording includes a substrate, a granular layer having magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, and a continuous film layer having magnetic grains to be exchange-coupled to the magnetic crystal grains, the grain boundary width of the magnetic grains being smaller than that of the magnetic crystal grains, wherein separation regions for magnetically separating tracks from each other are disposed in regions between the tracks of the magnetic recording medium in at least the continuous film layer.
摘要翻译： 用于垂直磁记录的磁记录介质包括基板，具有垂直磁各向异性的磁性晶粒的颗粒层和用于在磁晶粒的晶界处磁性分离磁晶粒的非磁性物质，以及连续的膜层 具有与磁性晶粒交换耦合的磁性颗粒，磁性颗粒的晶界宽度小于磁性晶粒的晶界宽度，其中将磁道彼此分离磁道的分离区域设置在 所述磁记录介质至少在所述连续膜层中。
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公开(公告)号：US20070148499A1
公开(公告)日：2007-06-28
申请号：US10576755
申请日：2005-06-29
CPC分类号： H01F10/007 , B82Y25/00 , G11B5/66 , G11B5/851 , G11B2005/0029 , H01F10/16 , H01F41/18
摘要： A magnetic disk 10 for use in perpendicular magnetic recording has at least a magnetic recording layer on a substrate 1. The magnetic recording layer is composed of a ferromagnetic layer 5 of a granular structure containing silicon (Si) or an oxide of silicon (Si) between crystal grains containing cobalt (Co), a stacked layer 7 having a first layer containing cobalt (Co) or a Co alloy and a second layer containing palladium (Pd) or platinum (Pt), and a spacer layer 6 interposed between the ferromagnetic layer 5 and the stacked layer 7. After forming the ferromagnetic layer 5 on the substrate 1 by sputtering in an argon gas atmosphere, the stacked layer 7 is formed by sputtering in the argon gas atmosphere at a gas pressure lower than that used when forming the ferromagnetic layer 5.
摘要翻译： 用于垂直磁记录的磁盘10在基板1上至少具有磁记录层。 磁记录层由包含钴（Co）的晶粒之间的含硅（Si）或硅（Si）的颗粒结构的铁磁层5构成，堆叠层7具有包含钴（Co）的第一层， 或Co合金和含有钯（Pd）或铂（Pt）的第二层，以及介于铁磁层5和堆叠层7之间的间隔层6。 在氩气气氛中通过溅射在基板1上形成铁磁层5之后，通过在氩气气氛中以低于形成铁磁层5时使用的气体压力的溅射形成堆叠层7。
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8.发明授权Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording medium 有权具有图案化辅助记录层的磁记录介质和用于制造这种磁记录介质的方法公开(公告)号：US08367228B2
公开(公告)日：2013-02-05
申请号：US12906414
申请日：2010-10-18
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
IPC分类号： G11B5/66
摘要： A method for manufacturing a magnetic recording medium for perpendicular magnetic recording includes the steps of forming a first magnetic layer which has magnetic crystal grains exhibiting perpendicular magnetic anisotropy and nonmagnetic substances for magnetically separating the magnetic crystal grains from each other at grain boundaries of the magnetic crystal grains, forming a second magnetic layer which has magnetic grains exchange-coupled to the magnetic crystal grains, a grain boundary width of the magnetic grains being smaller than a grain boundary width of the magnetic crystal grains, and forming separation regions which magnetically separate tracks from each other in regions between the tracks of the magnetic recording medium in at least the second magnetic layer. The separation regions are disposed substantially only in the second magnetic layer of the first magnetic layer and the second magnetic layer.
摘要翻译： 一种用于垂直磁记录的磁记录介质的制造方法包括以下步骤：形成具有垂直磁各向异性的磁性晶粒的第一磁性层和用于在磁性晶体的晶界处将磁性晶粒彼此磁分离的非磁性物质 形成具有磁性晶粒与磁性晶粒交换耦合的第二磁性层，所述磁性晶粒的晶界宽度小于所述磁性晶粒的晶界宽度，以及形成分离区域，其将磁道与 彼此在至少第二磁性层中的磁记录介质的轨道之间的区域中。 分离区域基本上仅设置在第一磁性层和第二磁性层的第二磁性层中。
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公开(公告)号：US09005699B2
公开(公告)日：2015-04-14
申请号：US11862410
申请日：2007-09-27
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Koichi Wago
摘要： A method for manufacturing a magnetic recording medium includes the steps of (a) forming a perpendicular magnetic recording layer and (b) applying an ion beam to regions between tracks of the perpendicular magnetic recording layer so as to form separation regions for magnetically separating the tracks from each other. In the step (a), a continuous film layer composed of a multilayer film is formed, and CoB layers and Pd layers are laminated in the multilayer film. In the step (b), the CoB layers and the Pd layers are melted by the ion beam so as to form an alloy of metals contained in the CoB layers and the Pd layers to thereby form the separation regions.
摘要翻译： 一种制造磁记录介质的方法包括以下步骤：（a）形成垂直磁记录层，和（b）将离子束施加到垂直磁记录层的轨道之间的区域，以便形成用于磁分离轨道的分离区域 从彼此。 在步骤（a）中，形成由多层膜构成的连续膜层，并且在多层膜中层叠CoB层和Pd层。 在步骤（b）中，CoB层和Pd层通过离子束熔化，以形成CoB层和Pd层中所含的金属的合金，从而形成分离区域。
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公开(公告)号：US08603650B2
公开(公告)日：2013-12-10
申请号：US10576755
申请日：2005-06-29
IPC分类号： G11B5/673
CPC分类号： H01F10/007 , B82Y25/00 , G11B5/66 , G11B5/851 , G11B2005/0029 , H01F10/16 , H01F41/18
摘要： A magnetic disk 10 for use in perpendicular magnetic recording has at least a magnetic recording layer on a substrate 1. The magnetic recording layer is composed of a ferromagnetic layer 5 of a granular structure containing silicon (Si) or an oxide of silicon (Si) between crystal grains containing cobalt (Co), a stacked layer 7 having a first layer containing cobalt (Co) or a Co alloy and a second layer containing palladium (Pd) or platinum (Pt), and a spacer layer 6 interposed between the ferromagnetic layer 5 and the stacked layer 7. After forming the ferromagnetic layer 5 on the substrate 1 by sputtering in an argon gas atmosphere, the stacked layer 7 is formed by sputtering in the argon gas atmosphere at a gas pressure lower than that used when forming the ferromagnetic layer 5.
摘要翻译： 用于垂直磁记录的磁盘10在基板1上至少具有磁记录层。磁记录层由含有硅（Si）或硅（Si）的氧化物的粒状结构的铁磁层5构成， 在含有钴（Co）的晶粒之间，具有包含钴（Co）或Co合金的第一层的堆叠层7和包含钯（Pd）或铂（Pt）的第二层的间隔层6和介于铁磁性 层5和堆叠层7.在氩气气氛中通过溅射在基板1上形成铁磁层5之后，层叠层7通过在氩气气氛中以比形成 铁磁层5。
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