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1. 发明授权

US09058831B2 Perpendicular magnetic recording medium with grain boundary controlling layers 有权
标题翻译：具有晶界控制层的垂直磁记录介质
公开(公告)号：US09058831B2
公开(公告)日：2015-06-16
申请号：US13326213
申请日：2011-12-14
申请人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
发明人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
IPC分类号： G11B5/66 , G11B5/65 , G11B5/851
CPC分类号： G11B5/66 , G11B5/65 , G11B5/84 , G11B5/851
摘要： In one embodiment, a perpendicular magnetic recording medium includes an oxide recording layer including an oxide and a non-oxide recording layer which does not contain an oxide positioned above the oxide recording layer. The oxide recording layer includes a region R1 where a grain boundary width in a direction parallel to a plane of formation of R1 increases therealong from a lowermost portion of the oxide recording layer toward a medium surface, a region R3 positioned above R1 wherein a grain boundary width increases therealong toward the medium surface, a region R2 where a grain boundary width of R2 decreases therealong from R1 to R3, with R2 being positioned between R1 and R3, and a region R4 where a grain boundary width of R4 decreases therealong from R3 toward the medium surface, with R4 being positioned above R3 and near an uppermost portion of the oxide recording layer.
摘要翻译：在一个实施例中，垂直磁记录介质包括氧化物记录层，该氧化物记录层包括不包含位于氧化物记录层上方的氧化物的氧化物和非氧化物记录层。氧化物记录层包括区域R1，其中平行于R1的形成平面的方向上的晶界宽度从氧化物记录层的最下部朝向介质表面增加，位于R1上方的区域R3，其中晶界宽度随着介质表面的增加而增加，其中R2的晶界宽度从R1向R3延伸的区域R2，R2位于R1和R3之间，R4的晶界宽度从R3向R3的边界宽度减小中间表面，其中R4位于R3上方并且靠近氧化物记录层的最上部。

2. 发明申请

US20130155542A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH GRAIN BOUNDARY CONTROLLING LAYERS 有权
标题翻译：具有颗粒边界控制层的全磁性记录介质
公开(公告)号：US20130155542A1
公开(公告)日：2013-06-20
申请号：US13326213
申请日：2011-12-14
申请人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
发明人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
IPC分类号： G11B21/02 , G11B5/851 , G11B5/66
CPC分类号： G11B5/66 , G11B5/65 , G11B5/84 , G11B5/851
摘要： In one embodiment, a perpendicular magnetic recording medium includes an oxide recording layer including an oxide and a non-oxide recording layer which does not contain an oxide positioned above the oxide recording layer. The oxide recording layer includes a region R1 where a grain boundary width in a direction parallel to a plane of formation of R1 increases therealong from a lowermost portion of the oxide recording layer toward a medium surface, a region R3 positioned above R1 wherein a grain boundary width increases therealong toward the medium surface, a region R2 where a grain boundary width of R2 decreases therealong from R1 to R3, with R2 being positioned between R1 and R3, and a region R4 where a grain boundary width of R4 decreases therealong from R3 toward the medium surface, with R4 being positioned above R3 and near an uppermost portion of the oxide recording layer.
摘要翻译：在一个实施例中，垂直磁记录介质包括氧化物记录层，该氧化物记录层包括不包含位于氧化物记录层上方的氧化物的氧化物和非氧化物记录层。氧化物记录层包括区域R1，其中平行于R1的形成平面的方向上的晶界宽度从氧化物记录层的最下部朝向介质表面增加，位于R1上方的区域R3，其中晶界宽度随着介质表面的增加而增加，其中R2的晶界宽度从R1向R3延伸的区域R2，R2位于R1和R3之间，R4的晶界宽度从R3向R3的边界宽度减小中间表面，其中R4位于R3上方并且靠近氧化物记录层的最上部。

3. 发明申请

US20120307395A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM WITH AN INVERTED Hk STRUCTURE 审中-公开
标题翻译：具有反转Hk结构的全磁性记录介质
公开(公告)号：US20120307395A1
公开(公告)日：2012-12-06
申请号：US13149780
申请日：2011-05-31
申请人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
发明人： Shun Tonooka , Kiwamu Tanahashi , Hiroyuki Nakagawa , Ichiro Tamai
IPC分类号： G11B21/02 , G11B5/667 , G11B5/66
CPC分类号： G11B5/66
摘要： According to one embodiment, a perpendicular magnetic recording medium includes a first granular recording layer characterized by a magnetic anisotropy Ku1, a second granular recording layer above the first granular recording layer characterized by a magnetic anisotropy Ku2, and a third granular recording layer above the second granular recording layer characterized by a magnetic anisotropy Ku3, wherein Ku3 Ku1. In another embodiment, a magnetic medium includes a first recording layer with a first CoCrPt alloy in a first ratio X1, a second recording layer above the first recording layer and having a second CoCrPt alloy in a second ratio X2, and a third recording layer above the second recording layer having a third CoCrPt alloy in a third ratio X3 with each ratio defined as a concentration of Pt divided by a concentration of Cr in the respective CoCrPt alloy, wherein X3 X1.
摘要翻译：根据一个实施例，垂直磁记录介质包括第一颗粒记录层，其特征在于磁各向异性Ku1，第一颗粒记录层之上的第二粒状记录层，其特征在于磁各向异性Ku2，第二颗粒记录层位于第二颗粒记录层上方其特征在于磁各向异性Ku3的粒状记录层，其中Ku3 Ku1。在另一个实施例中，磁介质包括具有第一比率X1的第一CoCrPt合金的第一记录层，第一记录层上方的第二记录层，并且具有第二比率X2的第二CoCrPt合金，以及第三记录层所述第二记录层具有第三比例X3的第三CoCrPt合金，其中每个比例定义为各自的CoCrPt合金中的Pt的浓度除以Cr的浓度，其中X3 X1。

4. 发明授权

US08390956B2 Perpendicular magnetic recording medium having FCC seed layers 有权
标题翻译：具有FCC种子层的垂直磁记录介质
公开(公告)号：US08390956B2
公开(公告)日：2013-03-05
申请号：US12793608
申请日：2010-06-03
申请人： Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamu Tanahashi
发明人： Shun Tonooka , Reiko Arai , Hiroyuki Nakagawa , Kiwamu Tanahashi
IPC分类号： G11B5/82 , G11B5/673 , B32B7/00
CPC分类号： G11B5/732 , G11B5/667 , Y10T428/24975
摘要： According to one embodiment, a perpendicular magnetic recording medium includes at least one soft magnetic underlayer above a substrate, a seed layer above the at least one soft magnetic underlayer, an intermediate layer above the seed layer, a magnetic recording layer above the intermediate layer, and an overcoat layer above the magnetic recording layer, wherein the seed layer includes a second seed layer above a first seed layer. In another embodiment, the seed layer is a multilayered structure of at least two cycles of a unit of layered film which includes a first seed layer and a second seed layer. The first seed layer includes a non-magnetic alloy having a Face-Centered-Cubic (FCC) structure, and the second seed layer includes a soft magnetic alloy having a FCC structure. Other structures are also disclosed, according to more embodiments.
摘要翻译：根据一个实施例，垂直磁记录介质包括至少一个在基底上方的软磁性底层，至少一个软磁性底层上方的晶种层，种子层上方的中间层，中间层上方的磁记录层，以及在所述磁记录层上方的覆盖层，其中所述种子层包括在第一种子层上方的第二种子层。在另一个实施方案中，种子层是包括第一种子层和第二种子层的分层膜单元的至少两个循环的多层结构。第一晶种层包括具有面心立方（FCC）结构的非磁性合金，第二晶种层包括具有FCC结构的软磁合金。根据更多实施例，还公开了其他结构。

5. 发明申请

US20110002064A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM (PMRM) AND MAGNETIC STORAGE DEVICE USING THE SAME 有权
标题翻译：全磁磁记录介质（PMRM）和使用其的磁性存储装置
公开(公告)号：US20110002064A1
公开(公告)日：2011-01-06
申请号：US12828073
申请日：2010-06-30
申请人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
发明人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
IPC分类号： G11B21/02 , G11B5/33
CPC分类号： G11B5/66 , G11B5/1278 , G11B5/65
摘要： According to one embodiment, a PMRM includes a substrate, a soft magnetic underlayer above the substrate, an underlayer above the soft magnetic underlayer, an oxide-containing magnetic layer above the underlayer, and a ferromagnetic layer above the magnetic layer having no oxides. The underlayer controls orientation and segregation of the magnetic layer. The oxide-containing magnetic layer comprises at least two or more magnetic layers, a Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer is between about 23 at. % and about 32 at. %, and a difference between the Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer and a magnetic layer having a lowest Cr concentration among the at least three magnetic layers is less than about 25 at. %, the magnetic layer with a lowest Cr concentration has a granular structure, and a nucleation field is greater than about 159.2 kA/m.
摘要翻译：根据一个实施例，PMRM包括衬底，衬底上方的软磁性底层，软磁性底层上方的底层，底层上方的含氧化物的磁性层以及不含氧化物的磁性层上方的铁磁性层。底层控制磁性层的取向和偏析。含氧化物的磁性层包括至少两个或更多个磁性层，与强磁性金属层相邻的磁性层的Cr浓度在约23at。％和约32英寸。％，并且与所述强磁性金属层相邻的磁性层的Cr浓度与所述至少三个磁性层中具有最低Cr浓度的磁性层之间的差异小于约25at。％，具有最低Cr浓度的磁性层具有粒状结构，并且成核场大于约159.2kA / m。

6. 发明授权

US08705208B2 Perpendicular magnetic recording medium (PMRM) and magnetic storage device using the same 有权
标题翻译：垂直磁记录介质（PMRM）和使用其的磁存储装置
公开(公告)号：US08705208B2
公开(公告)日：2014-04-22
申请号：US12828073
申请日：2010-06-30
申请人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
发明人： Hiroyuki Nakagawa , Reiko Arai , Ichiro Tamai , Kiwamu Tanahashi
IPC分类号： G11B5/82
CPC分类号： G11B5/66 , G11B5/1278 , G11B5/65
摘要： According to one embodiment, a PMRM includes a substrate, a soft magnetic underlayer above the substrate, an underlayer above the soft magnetic underlayer, an oxide-containing magnetic layer above the underlayer, and a ferromagnetic layer above the magnetic layer having no oxides. The underlayer controls orientation and segregation of the magnetic layer. The oxide-containing magnetic layer comprises at least two or more magnetic layers, a Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer is between about 23 at. % and about 32 at. %, and a difference between the Cr concentration of the magnetic layer adjacent to the ferromagnetic metal layer and a magnetic layer having a lowest Cr concentration among the at least three magnetic layers is less than about 25 at. %, the magnetic layer with a lowest Cr concentration has a granular structure, and a nucleation field is greater than about 159.2 kA/m.
摘要翻译：根据一个实施例，PMRM包括衬底，衬底上方的软磁性底层，软磁性底层上方的底层，底层上方的含氧化物的磁性层以及不含氧化物的磁性层上方的铁磁性层。底层控制磁性层的取向和偏析。含氧化物的磁性层包括至少两个或更多个磁性层，与强磁性金属层相邻的磁性层的Cr浓度在约23at。％和约32英寸。％，并且与所述强磁性金属层相邻的磁性层的Cr浓度与所述至少三个磁性层中具有最低Cr浓度的磁性层之间的差异小于约25at。％，具有最低Cr浓度的磁性层具有粒状结构，并且成核场大于约159.2kA / m。

7. 发明授权

US08440332B2 Perpendicular magnetic recording medium and magnetic storage device using the same 有权
公开(公告)号：US08440332B2
公开(公告)日：2013-05-14
申请号：US12384850
申请日：2009-04-08
申请人： Ichiro Tamai , Kiwamu Tanahashi
发明人： Ichiro Tamai , Kiwamu Tanahashi
IPC分类号： G11B5/66
CPC分类号： G11B5/66 , G11B5/65
摘要： Embodiments of the present invention provide a perpendicular magnetic recording medium that reduces the noise of granular recording layers, obtains sufficient overwrite characteristic that suppresses an increase in the magnetic cluster size, and allows high-density recording. According to one embodiment, a perpendicular magnetic recording medium comprising substrate having thereon at least soft magnetic layer, nonmagnetic intermediate layer, a perpendicular recording layer and protective layer formed in that order. The perpendicular recording layer consists of three or more layers of first recording layer, a second recording layer, and a third recording layer from the side nearer to the substrate. The first recording layer and the second recording layer have a granular structure comprising a grain boundary of an oxide surrounding ferromagnetic crystal grains containing Co and Pt, and the third recording layer has a non-granular structure mainly comprising Co and not containing an oxide. The grain boundary of the first recording layer contains Si, Cr and oxygen, and at least one element selected from Ti, Ta and Nb, and the grain boundary of the second recording layer contains Cr and oxygen, or contains Cr and oxygen and at least one element selected from Si, W and V.

8. 发明授权

US07056604B2 Magnetic recording media and magnetic recording system using the same 失效
公开(公告)号：US07056604B2
公开(公告)日：2006-06-06
申请号：US10452723
申请日：2003-06-03
申请人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
发明人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/39 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/26
摘要： A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.

9. 发明授权

US06574060B2 Magnetic storage apparatus 失效
标题翻译：磁存储装置
公开(公告)号：US06574060B2
公开(公告)日：2003-06-03
申请号：US09799073
申请日：2001-03-06
申请人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
发明人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
IPC分类号： G11B502
CPC分类号： G11B5/7325 , C23C14/185 , G11B5/00 , G11B5/012 , G11B2005/001 , G11B2005/0016 , Y10S428/90 , Y10S428/928 , Y10T428/1107 , Y10T428/1121 , Y10T428/12507 , Y10T428/1266 , Y10T428/12667 , Y10T428/12674 , Y10T428/12819 , Y10T428/12826 , Y10T428/12868 , Y10T428/12944 , Y10T428/265
摘要： In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, a way to cause the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magnetoresistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of hte underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.
摘要翻译：在具有磁记录介质的磁存储装置中，用于以预先指定的记录方向驱动该介质的驱动单元，包括记录器部分和再现部分的磁头组件，使磁头相对于磁记录介质和记录/重放信号处理器，用于对磁头进行信号输入并用于实现来自磁头的输出信号的再现，所述磁头的再现部分由磁阻效应型磁头而所述磁记录介质被构造成包括衬底和形成在其上的一个或多个底层之间的磁性层，其中至少一个底层是由非晶或微晶材料制成的特定层，其中含有Ni作为其主要成分或主要成分，还含有至少一种e 选自Nb和Ta组成的组。

10. 发明授权

US07182974B2 Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium 失效
标题翻译：磁记录介质及其制造方法以及使用这种磁记录介质的磁记录系统
公开(公告)号：US07182974B2
公开(公告)日：2007-02-27
申请号：US10774371
申请日：2004-02-10
申请人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
发明人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
IPC分类号： B05D5/12
CPC分类号： G11B5/64 , G11B5/66 , G11B5/84 , Y10T428/12465 , Y10T428/12875 , Y10T428/31
摘要： A magnetic recording medium having a high coercive force and being capable of high-density writing/reading has a substrate, a soft magnetic layer, a non-magnetic intermediate layer, a magnetic layer, a protective layer, and a lubricating layer. The magnetic layer is characterized by stacking fault density and dispersion of particle diameters. The stacking fault density should preferably be no larger than 0.05, and the dispersion of particle diameters should preferably be no larger than 0.4. The magnetic recording medium has a coercive force larger than 4000 Oe, is highly stable to thermal decay, and has a recording density in excess of 50 Gbit/in2.
摘要翻译：具有高矫顽磁力并且能够进行高密度写入/读取的磁记录介质具有基板，软磁层，非磁性中间层，磁性层，保护层和润滑层。磁性层的特征在于堆垛层错密度和粒径分散。堆垛层错密度优选为0.05以下，粒径分布优选为0.4以下。磁记录介质具有大于4000Oe的矫顽力，对热衰减高度稳定，并且具有超过50Gbit / in 2的记录密度。

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