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21. 发明申请

US20050208341A1 Magnetic recording medium 有权
公开(公告)号：US20050208341A1
公开(公告)日：2005-09-22
申请号：US11123065
申请日：2005-05-06
申请人： Takashi Morikawa , Teiichiro Umezawa , Hiroshi Tomiyasu , Masafumi Ishiyama
发明人： Takashi Morikawa , Teiichiro Umezawa , Hiroshi Tomiyasu , Masafumi Ishiyama
IPC分类号： G11B5/72 , G11B5/64
CPC分类号： G11B5/72 , Y10T428/1179 , Y10T428/265 , Y10T428/30
摘要： In a magnetic recording medium which comprises a substrate (1), a magnetic layer (3) formed on the substrate, a carbon-based protection layer (4) comprising carbon and formed on the magnetic layer, and a lubrication layer (5) formed on the carbon-based protection layer, the carbon-based protection layer comprises a hydrogenated carbon protection layer (4a) facing the magnetic layer and a nitrogenated carbon protection layer (4b) facing the lubrication layer. The hydrogenated carbon protection layer (4a) comprises carbon and hydrogen. The nitrogenated carbon protection layer (4b) includes no hydrogen but comprises carbon and nitrogen.

22. 发明授权

US09349404B2 Perpendicular magnetic recording disc 有权
标题翻译：垂直磁记录盘
公开(公告)号：US09349404B2
公开(公告)日：2016-05-24
申请号：US13149613
申请日：2011-05-31
申请人： Teiichiro Umezawa , Kazuaki Sakamoto
发明人： Teiichiro Umezawa , Kazuaki Sakamoto
IPC分类号： G11B5/66 , G11B5/73
CPC分类号： G11B5/7325
摘要： [Problem] A perpendicular magnetic disk with an improved SNR and an increased recording density by further improving crystal orientation of a preliminary ground layer formed of an Ni-base alloy is provided.[Solution] A typical structure of the perpendicular magnetic disk according to the present invention includes, on a base 110, a soft magnetic layer 130, a Ta alloy layer 140 provided on the soft magnetic layer 130, an Ni alloy layer 142 provided on the Ta alloy layer 140, a ground layer 150 provided on the Ni alloy layer 142 and having Ru as a main component, and a granular magnetic layer 160 provided on the ground layer 150. The Ta alloy layer 140 is a layer containing 10 atomic percent or more and 45 atomic percent or less Ta and having amorphous and soft magnetic properties.
摘要翻译： [问题]提供了通过进一步改善由Ni基合金形成的预备接地层的晶体取向而具有改善的SNR和增加的记录密度的垂直磁盘。 [解决方案]根据本发明的垂直磁盘的典型结构在基底110上包括软磁层130，设置在软磁层130上的Ta合金层140，设置在软磁层130上的Ni合金层142 Ta合金层140，设置在Ni合金层142上并具有Ru作为主要成分的接地层150和设置在接地层150上的粒状磁性层160.Ta合金层140是含有10原子％或多于45原子％或更少的Ta，并具有无定形和软磁性能。

23. 发明授权

US08367228B2 Magnetic recording medium having patterned auxiliary recording layer and method for manufacturing such magnetic recording medium 有权
标题翻译：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
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/66 , G11B5/743 , G11B5/855 , G11B2005/0029
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。

24. 发明申请

US20090191331A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD 审中-公开
标题翻译：全能磁记录介质制造方法
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
CPC分类号： G11B5/667 , G11B5/84
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。

25. 发明授权

US09064518B2 Perpendicular magnetic recording medium 有权
标题翻译：垂直磁记录介质
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
IPC分类号： G11B5/66 , G11B5/65
CPC分类号： G11B5/66 , G11B5/65 , G11B5/656
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

26. 发明授权

US07833639B2 Magnetic recording medium and method for manufacturing magnetic recording medium 有权
标题翻译：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
CPC分类号： G11B5/82 , B82Y10/00 , G11B5/66 , G11B5/743 , G11B5/855 , G11B2005/0029
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。

27. 发明申请

US20070148499A1 Perpendicular magnetic recording disk and manufacturing method thereof 有权
标题翻译：垂直磁记录盘及其制造方法
公开(公告)号：US20070148499A1
公开(公告)日：2007-06-28
申请号：US10576755
申请日：2005-06-29
申请人： Yoshiaki Sonobe , Teiichiro Umezawa , Chikara Takasu
发明人： Yoshiaki Sonobe , Teiichiro Umezawa , Chikara Takasu
IPC分类号： G11B5/66 , C23C14/00
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。

28. 发明授权

US07220500B1 Magnetic recording medium, and thermal stability measuring method and apparatus of magnetic recording medium 有权
公开(公告)号：US07220500B1
公开(公告)日：2007-05-22
申请号：US09540646
申请日：2000-03-31
申请人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
发明人： Hiroshi Tomiyasu , Teiichiro Umezawa , Genshichi Hata , Takashi Morikawa , Masato Kobayashi , Masashi Suzuki , Satoshi Yokota , Tsuyoshi Watanabe
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/732 , G11B5/40 , G11B5/455 , G11B5/66 , G11B5/7325
摘要： There is disclosed a magnetic recording medium in which a seed layer, under layer, intermediate layer, first magnetic layer, nonmagnetic layer, second magnetic layer, protective layer, and lubricant layer are successively laminated on a glass substrate, the nonmagnetic layer is constituted of an alloy containing Cr and C, and the magnetic layer is constituted of an alloy containing Co and Pt. The under layer includes at least the seed layer for finely dividing the crystal particles of the magnetic layer, the seed layer includes at least two or more layers of nonmagnetic films, and the intermediate layer formed of the material different from that of the nonmagnetic film is interposed between the nonmagnetic films. In measurement of the thermal stability of the magnetic recording medium, a head is used, the head includes a read/write element, and a write track width is twice or more as large as a read track width in the head.

29. 发明申请

US20090117408A1 PERPENDICULAR MAGNETIC RECORDING DISK AND METHOD OF MANUFACTURING THE SAME 审中-公开
标题翻译：全磁性记录磁盘及其制造方法
公开(公告)号：US20090117408A1
公开(公告)日：2009-05-07
申请号：US12295573
申请日：2007-03-31
申请人： Teiichiro Umezawa , Lianjun Wu , Yoshiaki Sonobe , Chikara Takasu , Takahiro Onoue
发明人： Teiichiro Umezawa , Lianjun Wu , Yoshiaki Sonobe , Chikara Takasu , Takahiro Onoue
IPC分类号： G11B5/66 , C23C14/35
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

30. 发明申请

US20090081483A1 PERPENDICULAR MAGNETIC RECORDING DISK AND MANUFACTURING METHOD THEREOF 有权
标题翻译：全能磁记录盘及其制造方法
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
IPC分类号： G11B5/738 , B05D1/36
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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