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21.发明授权Perpendicular magnetic recording medium and magnetic recording device using the same 失效垂直磁记录介质和使用其的磁记录装置
公开(公告)号：US5863631A
公开(公告)日：1999-01-26
申请号：US813017
申请日：1997-03-06
摘要： A perpendicular magnetic recording medium wherein a perpendicular magnetic film is formed on a substrate or a nonmagnetic film, and the perpendicular magnetic film contains Co and Cr, the content of the Cr being 22 at. % or higher but 30 at. % or less. The medium is used in a magnetic recording disk drive using a magnetoresistive read head.
摘要翻译： 在基板或非磁性膜上形成垂直磁性膜的垂直磁记录介质，并且垂直磁性膜含有Co和Cr，Cr的含量为22原子。 ％或更高，但30 at。 ％ 或更少。 该介质用于使用磁阻读头的磁记录盘驱动器。
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22.发明授权公开(公告)号：US09715915B2
公开(公告)日：2017-07-25
申请号：US14922530
申请日：2015-10-26
申请人： Eiji Kita , Yoshiaki Sonobe
发明人： Eiji Kita , Yoshiaki Sonobe
CPC分类号： G11C11/161 , G11B5/3906 , G11B5/3909 , G11C11/1673 , G11C11/1675 , H01L27/228 , H01L43/02 , H01L43/08 , H01L43/10
摘要： Magneto-resistive devices with lower power consumption and higher stability are provided. The magneto-resistive devices may include a pinned layer, a free layer and an insulating layer between the pinned layer and the free layer. The pinned layer, the free layer and the insulating layer may constitute a magnetic tunnel junction. The free layer may include a first magnetic layer and a second magnetic layer that has a Curie temperature lower than a Curie temperature of the first magnetic layer.
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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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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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26.发明授权公开(公告)号：US07983003B2
公开(公告)日：2011-07-19
申请号：US11485328
申请日：2006-07-13
IPC分类号： G11B5/82
CPC分类号： G11B5/667 , G11B5/8404
摘要： A perpendicular magnetic recording medium 10 adapted to be mounted in a perpendicular magnetic recording type hard disk drive and including a disk-shaped disk base 12, a soft magnetic layer 14 formed on the disk base 12, and a perpendicular magnetic recording layer 16 formed on the soft magnetic layer 14, wherein, at respective portions of the soft magnetic layer 14, directional distribution of easy magnetization axes of magnetic particles included In each of the respective portions is isotropic with respect to respective directions in the main surface of the soft magnetic layer 14.
摘要翻译： 适用于垂直磁记录型硬盘驱动器的垂直磁记录介质10，包括盘形盘基座12，形成在盘基座12上的软磁层14和垂直磁记录层16， 软磁性层14，其中，在软磁性层14的各个部分，包含的磁性粒子容易磁化轴的方向分布在各个部分中，相对于软磁性层主表面的各个方向各向同性 14。
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27.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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公开(公告)号：US20100309584A1
公开(公告)日：2010-12-09
申请号：US12745194
申请日：2009-03-09
申请人： Junichi Yasumori , Yoshiaki Sonobe
发明人： Junichi Yasumori , Yoshiaki Sonobe
摘要： To provide a magnetic recording medium enabling excellent magnetic recording reproduction characteristics to be exhibited with the spacing loss reduced and a manufacturing method of the medium, a method of manufacturing a magnetic recording medium of the invention is to manufacture a magnetic recording medium having a magnetic recording layer of a granular structure having nonmagnetic boundary portions between pillar-shaped magnetic particles on a nonmagnetic substrate, and an exchange coupling layer provided on the magnetic recording layer to add an action of exchange coupling the magnetic particles, and is characterized by having an ion irradiation step of performing ion irradiation on the entire surface of the exchange coupling layer after layering the exchange coupling layer on the magnetic recording layer.
摘要翻译： 为了提供能够显着降低间隔损耗的优异磁记录再现特性的磁记录介质和介质的制造方法，本发明的磁记录介质的制造方法是制造具有磁记录的磁记录介质 在非磁性基板上的柱状磁性颗粒之间具有非磁性边界部分的粒状结构层和设置在磁记录层上的交换耦合层，以增加耦合磁性颗粒的作用，其特征在于具有离子辐射 在将记录层上的交换耦合层分层之后，在交换耦合层的整个表面上进行离子辐射的步骤。
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29.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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公开(公告)号：US20100196741A1
公开(公告)日：2010-08-05
申请号：US12602430
申请日：2008-05-30
申请人： Yoshiaki Sonobe , Kong Kim
发明人： Yoshiaki Sonobe , Kong Kim
CPC分类号： G11B5/667 , G11B5/7325 , G11B5/851
摘要： [Problems] To provide a process for producing a magnetic recording medium, which can simultaneously realize increased high recording density, high impact resistance, and prevention of corrosion, by providing an underlayer which, even when formed at a low gas pressure, can exhibit a high level of coercive force.[Means for Solving Problems] A process for producing a perpendicular magnetic recording medium, comprising the step of forming a nonmagnetic underlayer (18) having a granular structure, in which crystal particles are grown in a column form, on a substrate, and forming a magnetic recording layer (20) having a granular structure in which magnetic particles are grown in a column form. The process is characterized in that the underlayer (18) is any one of CoCr or CoCrX (wherein X is a nonmagnetic material), CoCr-oxide, and CoCrX-oxide, and the film forming gas pressure of the underlayer (18) is not more than 4 Pa.
摘要翻译： [问题]提供一种制造磁记录介质的方法，其可以同时实现增加的高记录密度，高耐冲击性和防止腐蚀，通过提供底层，即使在低气压下形成时， 高水平的矫顽力。 解决问题的手段一种垂直磁记录介质的制造方法，其特征在于，在基板上形成具有以柱状生长结晶粒子的具有粒状结构的非磁性底层（18）的工序， 磁性记录层（20）具有磁性颗粒以柱状生长的粒状结构。 该工艺的特征在于，底层（18）是CoCr或CoCrX（其中X是非磁性材料），CoCr-氧化物和CoCrX-氧化物中的任一种，并且底层（18）的成膜气体压力不是 超过4 Pa。
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