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1. 发明申请

US20110032638A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM, MANUFACTURING PROCESS OF THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THE SAME 审中-公开
公开(公告)号：US20110032638A1
公开(公告)日：2011-02-10
申请号：US12907943
申请日：2010-10-19
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
IPC分类号： G11B5/012 , G11B5/667
CPC分类号： G11B5/667 , G11B5/66 , G11B5/84 , G11B5/852
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nonmagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.

2. 发明申请

US20110151144A1 PERPENDICULAR MAGNETIC RECORDING MEDIUM, MANUFACTURING PROCESS OF THE SAME, AND MAGNETIC RECORDING/REPRODUCING APPARATUS USING THE SAME 审中-公开
标题翻译：全息磁记录介质，其制造方法和使用其的磁记录/再现装置
公开(公告)号：US20110151144A1
公开(公告)日：2011-06-23
申请号：US12969351
申请日：2010-12-15
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
IPC分类号： G11B5/852 , B05D3/00 , B82Y10/00 , B82Y40/00
CPC分类号： G11B5/667 , G11B5/66 , G11B5/84 , G11B5/852
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nonmagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.
摘要翻译：本发明的实施例提供了一种改进的飞行能力，高读取信号质量并且能够抑制由杂散场引起的记录磁化的磁衰减的垂直磁记录介质。在一个实施例中，垂直记录层在其上具有软磁性底层的衬底上形成，然后在衬底和软磁性底层之间形成无定形或纳米晶层。软磁性底层包括第一和第二非晶软磁性层，以及在这些第一和第二非晶软磁性层之间形成的非磁性层。第一和第二非晶软磁性层分别在基板的径向方向上具有单轴各向异性，并且彼此反铁磁耦合。

3. 发明申请

US20050244679A1 Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same 有权
标题翻译：垂直磁记录介质及其制造方法以及使用其的磁记录/再现装置
公开(公告)号：US20050244679A1
公开(公告)日：2005-11-03
申请号：US11107588
申请日：2005-04-15
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
IPC分类号： G11B5/667 , G11B5/127 , G11B5/66 , G11B5/73 , G11B5/738 , G11B5/84 , G11B5/851 , G11B5/852 , H01F10/13 , H01F10/16 , H01F10/32 , H01F41/18
CPC分类号： G11B5/667 , G11B5/66 , G11B5/84 , G11B5/852
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nomnagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.
摘要翻译：本发明的实施例提供了一种改进的飞行能力，高读取信号质量并且能够抑制由杂散场引起的记录磁化的磁衰减的垂直磁记录介质。在一个实施例中，垂直记录层在其上具有软磁性底层的衬底上形成，然后在衬底和软磁性底层之间形成无定形或纳米晶层。软磁性底层包括第一和第二非晶软磁性层，以及在第一和第二非晶软磁性层之间形成的正磁性层。第一和第二非晶软磁性层分别在基板的径向方向上具有单轴各向异性，并且彼此反铁磁耦合。

4. 发明授权

US07875371B2 Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic recording/reproducing apparatus using the same 有权
标题翻译：垂直磁记录介质及其制造方法以及使用其的磁记录/再现装置
公开(公告)号：US07875371B2
公开(公告)日：2011-01-25
申请号：US11107588
申请日：2005-04-15
申请人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
发明人： Reiko Arai , Kiwamu Tanahashi , Yoshinori Honda , Mineaki Kodama
IPC分类号： G11B5/667 , G11B5/738
CPC分类号： G11B5/667 , G11B5/66 , G11B5/84 , G11B5/852
摘要： Embodiments of the invention provide a perpendicular magnetic recording medium improved for fly ability, high in read signal quality, and capable of suppressing magnetic decay of recorded magnetization to be caused by stray fields. In one embodiment, a perpendicular recording layer is formed over a substrate with a soft magnetic underlayer therebetween, then an amorphous or nano-crystalline layer is formed between the substrate and the soft magnetic underlayer. The soft magnetic underlayer includes first and second amorphous soft magnetic layers, as well as a nonmagnetic layer formed between those first and second amorphous soft magnetic layers. The first and second amorphous soft magnetic layers are given uniaxial anisotropy in the radial direction of the substrate respectively and coupled with each other antiferromagnetically.
摘要翻译：本发明的实施例提供了一种改进的飞行能力，高读取信号质量并能够抑制由杂散场引起的记录磁化的磁衰减的垂直磁记录介质。在一个实施例中，垂直记录层在其上具有软磁性底层的衬底上形成，然后在衬底和软磁性底层之间形成无定形或纳米晶层。软磁性底层包括第一和第二非晶软磁性层，以及在这些第一和第二非晶软磁性层之间形成的非磁性层。第一和第二非晶软磁性层分别在基板的径向方向上具有单轴各向异性，并且彼此反铁磁耦合。

5. 发明申请

US20080113225A1 Perpendicular magnetic recording medium and method for manufacturing the same 审中-公开
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：US20080113225A1
公开(公告)日：2008-05-15
申请号：US11983576
申请日：2007-11-09
申请人： Kiwamu Tanahashi , Yoshibumi Matsuda , Mineaki Kodama , Koji Sakamoto , Tomoo Yamamoto , Joe Inagaki
发明人： Kiwamu Tanahashi , Yoshibumi Matsuda , Mineaki Kodama , Koji Sakamoto , Tomoo Yamamoto , Joe Inagaki
IPC分类号： G11B5/66 , G11B5/84
CPC分类号： G11B5/66 , G11B5/65 , G11B5/851
摘要： Fluctuation of read/write characteristics during mass production is suppressed for a perpendicular magnetic recording medium having a perpendicular recording layer of a bi-layered structure, in which a first Co—Cr—Pt alloy magnetic layer containing an oxide and a second Co—Cr—Pt magnetic layer are formed successively. According to one embodiment, in a perpendicular magnetic recording medium, an adhesion layer, a soft magnetic underlayer, a seed layer, an intermediate layer, a perpendicular recording layer, a protective layer, and a lubricating layer are successively formed on a substrate. The perpendicular recording layer has a bi-layered structure in which a first Co—Cr—Pt alloy magnetic layer containing an oxide and a second Co—Cr—Pt alloy magnetic layer containing a marker element for measurement of a thickness selected from Mo, Mn, and V are successively formed, and the content of the marker element for measurement of thickness is about 1.5 at % or more and about 5 at % or less.
摘要翻译：对于具有双层结构的垂直记录层的垂直磁记录介质，抑制了批量生产期间读/写特性的波动，其中含有氧化物的第一Co-Cr-Pt合金磁性层和第二Co-Cr - 磁层依次形成。根据一个实施例，在垂直磁记录介质中，在基板上依次形成粘合层，软磁性底层，种子层，中间层，垂直记录层，保护层和润滑层。垂直记录层具有双层结构，其中含有氧化物的第一Co-Cr-Pt合金磁性层和含有用于测量选自Mo，Mn的标记元素的第二Co-Cr-Pt合金磁性层，V依次形成，厚度测定用标记要素的含量为1.5at％以上约5at％以下。

6. 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。

7. 发明授权

US07217467B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质和磁记录/再现装置
公开(公告)号：US07217467B2
公开(公告)日：2007-05-15
申请号：US10699737
申请日：2003-11-04
申请人： Reiko Arai , Kiwamu Tanahashi , Atsushi Kikugawa
发明人： Reiko Arai , Kiwamu Tanahashi , Atsushi Kikugawa
IPC分类号： G11B5/667 , G11B5/673
CPC分类号： G11B5/732 , G11B5/667 , G11B2005/0029
摘要： A magnetic recording/reproducing apparatus is disclosed with high storage capability. The apparatus also prevents fluctuation of readback output and decay of magnetization or erasure of recorded magnetization in the recording layer. A soft magnetic underlayer and a perpendicular recording layer are formed in specific order on the substrate of a magnetic disk. The soft magnetic underlayer has a triple-layered structure in which a domain control layer, including an anti-ferromagnetic layer, is sandwiched between two first and second soft magnetic layers. The thickness of the first and second soft magnetic layers (d1, d2) is between 25 nm and 150 nm and a ratio of d1/d2 is within a range of 0.3 to 1.5. Accordingly, magnetic domains in the soft magnetic underlayer of a perpendicular magnetic recording medium can be controlled and magnetic domain wall motion can be inhibited.
摘要翻译：公开了具有高存储能力的磁记录/重放装置。该装置还防止记录层中的回读输出波动和磁化衰减或记录磁化的擦除。在磁盘的基板上以特定顺序形成软磁性底层和垂直记录层。软磁性底层具有三层结构，其中包括反铁磁层的域控制层夹在两个第一和第二软磁层之间。第一和第二软磁性层（d 1，d 2）的厚度为25nm〜150nm，d 1 / d 2的比例为0.3〜1.5。因此，可以控制垂直磁记录介质的软磁性底层中的磁畴，并且可以抑制磁畴壁运动。

8. 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。

9. 发明授权

US07153596B2 Perpendicular magnetic recording medium, manufacturing process of the same, and magnetic storage apparatus using the same 有权
标题翻译：垂直磁记录介质，其制造工艺及其使用的磁存储装置
公开(公告)号：US07153596B2
公开(公告)日：2006-12-26
申请号：US10697002
申请日：2003-10-31
申请人： Kiwamu Tanahashi , Reiko Arai , Atsushi Kikugawa
发明人： Kiwamu Tanahashi , Reiko Arai , Atsushi Kikugawa
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/1278 , G11B5/66 , G11B5/84
摘要： A soft magnetic underlayer includes a first amorphous soft magnetic layer to which an exchange bias magnetic field is applied directly from an antiferromagnetic layer or via a ferromagnetic layer, and a second amorphous soft magnetic layer which is formed on the first amorphous soft magnetic layer via a non-magnetic layer. The first amorphous soft magnetic layer and the second amorphous soft magnetic layer are antiferromagnetically coupled.
摘要翻译：软磁性底层包括第一非晶软磁性层，其中直接从反铁磁性层或通过铁磁性层施加交换偏置磁场，以及第二非晶软磁性层，其通过经由非磁性层。第一非晶软磁层和第二非晶软磁层是反铁磁耦合的。

10. 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。

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