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1. 发明申请

US20070259214A1 Perpendicular Magnetic Recording Medium and Perpendicular Magnetic Recording/Reproducing Apparatus 失效
标题翻译：垂直磁记录介质和垂直磁记录/再现设备
公开(公告)号：US20070259214A1
公开(公告)日：2007-11-08
申请号：US11666309
申请日：2005-10-28
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/667
CPC分类号： G11B5/732
摘要： The invention provides a perpendicular magnetic recording medium in which the recording density is greatly increased with little deviation of the crystal structure. A perpendicular magnetic recording medium has at least a soft magnetic under layer, an orientation control layer, a perpendicular magnetic layer, and a protective layer, which are formed on a nonmagnetic substrate, the orientation control layer consisting of a plurality of layers including a seed layer and an intermediate layer from the substrate side. Preferably, the seed layer and the intermediate layer each have a hexagonal close-packed (hcp) structure, and the average grain size of the seed layer is between 8 nm and 20 nm. The main component of the seed layer is preferably Mg, and the main component of the intermediate layer is preferably Ru.
摘要翻译：本发明提供了一种垂直磁记录介质，其中记录密度大大增加，晶体结构几乎没有偏差。垂直磁记录介质至少形成在非磁性基板上的软磁下层，取向控制层，垂直磁性层和保护层，所述取向控制层由包括种子的多个层层和中间层。优选地，种子层和中间层各自具有六方密堆积（hcp）结构，种子层的平均晶粒尺寸在8nm和20nm之间。种子层的主要成分优选为Mg，中间层的主要成分优选为Ru。

2. 发明授权

US08116035B2 Magnetic recording medium having a secondary recording layer made of a material having a negative crystal magnetic anisotropy and magnetic recording and reproducing apparatus 有权
标题翻译：具有由具有负晶体磁各向异性的材料制成的辅助记录层和磁记录和再现装置的磁记录介质
公开(公告)号：US08116035B2
公开(公告)日：2012-02-14
申请号：US11917088
申请日：2006-06-09
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/74 , G11B5/66
CPC分类号： H01F10/3227 , G11B5/65 , G11B5/66 , G11B5/855 , H01F10/007 , H01F10/16 , H01F10/3286
摘要： The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.
摘要翻译：本发明提供一种磁记录介质和磁记录和重放装置。磁记录介质包括基板11，形成在基板11上的底层12，形成在下层12上的磁记录层13和形成在磁记录层13上的保护层14。磁记录层13 由相互交换耦合的主记录层14和辅助记录层15组成。主记录层14具有磁性粒子和围绕磁性粒子的非磁性材料，并且具有垂直的磁各向异性。辅助记录层15由具有负晶体磁各向异性的材料制成，其易磁化平面是介质的平面。

3. 发明申请

US20090034119A1 Perpendicular Magnetic Recording Medium, and Perpendicular Magnetic Recording and Reproducing Apparatus 失效
标题翻译：垂直磁记录介质和垂直磁记录和再现设备
公开(公告)号：US20090034119A1
公开(公告)日：2009-02-05
申请号：US11886635
申请日：2006-03-29
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/127 , G11B5/667
CPC分类号： G11B5/667 , H01F10/16 , H01F10/30
摘要： The invention provides a perpendicular recording medium with high recording density, and a magnetic recording and reproducing apparatus, by improving the function of magnetic anisotropy of a soft magnetic underlayer. The perpendicular recording medium has at least a soft magnetic underlayer and a perpendicular magnetic recording layer on a non-magnetic substrate, wherein when Ku⊥ (erg/cm3) is defined as a perpendicular magnetic anisotropic energy, and Ms (emu/cm 3) is defined as a saturation magnetization of the soft magnetic underlayer, Ku⊥ of the soft magnetic underlayer has a negative value and Ku⊥
摘要翻译：通过提高软磁性底层的磁各向异性的功能，本发明提供了具有高记录密度的垂直记录介质和磁记录和再现装置。垂直记录介质在非磁性基板上至少具有软磁性底层和垂直磁记录层，其中当Ku⊥（erg / cm3）被定义为垂直磁各向异性能时，Ms（emu / cm 3）定义为软磁性底层的饱和磁化强度，软磁性底层的Ku⊥为负值，Ku⊥<-2piMs2。结果，软磁性底层的易磁化轴在基板表面平坦地取向，这有效地抑制了WATE现象和尖峰噪声。

4. 发明授权

US07879466B2 Perpendicular magnetic recording medium, and perpendicular magnetic recording and reproducing apparatus 失效
标题翻译：垂直磁记录介质和垂直磁记录和再现设备
公开(公告)号：US07879466B2
公开(公告)日：2011-02-01
申请号：US11886635
申请日：2006-03-29
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/65 , G11B5/667
CPC分类号： G11B5/667 , H01F10/16 , H01F10/30
摘要： The invention provides a perpendicular recording medium with high recording density, and a magnetic recording and reproducing apparatus, by improving the function of magnetic anisotropy of a soft magnetic underlayer. The perpendicular recording medium has at least a soft magnetic underlayer and a perpendicular magnetic recording layer on a non-magnetic substrate, wherein when Ku⊥ (erg/cm3) is defined as a perpendicular magnetic anisotropic energy, and Ms (emu/cm 3) is defined as a saturation magnetization of the soft magnetic underlayer, Ku⊥ of the soft magnetic underlayer has a negative value and Ku⊥
摘要翻译：通过提高软磁性底层的磁各向异性的功能，本发明提供了具有高记录密度的垂直记录介质和磁记录和再现装置。垂直记录介质在非磁性基板上至少具有软磁性底层和垂直磁记录层，其中当Ku⊥（erg / cm3）被定义为垂直磁各向异性能时，Ms（emu / cm 3）被定义为软磁性底层的饱和磁化强度，软磁性底层的Ku⊥为负值，Ku⊥<-2＆pgr; Ms2。结果，软磁性底层的易磁化轴在基板表面平坦地取向，这有效地抑制了WATE现象和尖峰噪声。

5. 发明授权

US07687158B2 Perpendicular magnetic recording medium and perpendicular magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质和垂直磁记录/再现装置
公开(公告)号：US07687158B2
公开(公告)日：2010-03-30
申请号：US11666309
申请日：2005-10-28
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/66
CPC分类号： G11B5/732
摘要： The invention provides a perpendicular magnetic recording medium in which the recording density is greatly increased with little deviation of the crystal structure. A perpendicular magnetic recording medium has at least a soft magnetic under layer, an orientation control layer, a perpendicular magnetic layer, and a protective layer, which are formed on a nonmagnetic substrate, the orientation control layer consisting of a plurality of layers including a seed layer and an intermediate layer from the substrate side. Preferably, the seed layer and the intermediate layer each have a hexagonal close-packed (hcp) structure, and the average grain size of the seed layer is between 8 nm and 20 nm. The main component of the seed layer is preferably Mg, and the main component of the intermediate layer is preferably Ru.
摘要翻译：本发明提供了一种垂直磁记录介质，其中记录密度大大增加，晶体结构几乎没有偏差。垂直磁记录介质至少形成在非磁性基板上的软磁下层，取向控制层，垂直磁性层和保护层，所述取向控制层由包括种子的多个层层和中间层。优选地，种子层和中间层各自具有六方密堆积（hcp）结构，种子层的平均晶粒尺寸在8nm和20nm之间。种子层的主要成分优选为Mg，中间层的主要成分优选为Ru。

6. 发明申请

US20090231755A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 有权
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US20090231755A1
公开(公告)日：2009-09-17
申请号：US11917088
申请日：2006-06-09
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/127 , G11B5/66
CPC分类号： H01F10/3227 , G11B5/65 , G11B5/66 , G11B5/855 , H01F10/007 , H01F10/16 , H01F10/3286
摘要： The invention provides a magnetic recording medium, and a magnetic recording and reproducing apparatus. The magnetic recording medium includes a substrate 11, an under layer 12 formed on the substrate 11, a magnetic recording layer 13 formed on the under layer 12, and a protective layer 14 formed on the magnetic recording layer 13. The magnetic recording layer 13 is composed of a primary recording layer 14 and a secondary recording layer 15 which are mutually exchange-coupled. The primary recording layer 14 has magnetic grains and a nonmagnetic material that surrounds the magnetic grains, and has a perpendicular magnetic anisotropy. The secondary recording layer 15 is made of a material having a negative crystal magnetic anisotropy and its easy plane of the magnetization is a plane of the medium.
摘要翻译：本发明提供一种磁记录介质和磁记录和重放装置。磁记录介质包括基板11，形成在基板11上的底层12，形成在下层12上的磁记录层13和形成在磁记录层13上的保护层14。磁记录层13 由相互交换耦合的主记录层14和辅助记录层15组成。主记录层14具有磁性粒子和围绕磁性粒子的非磁性材料，并且具有垂直的磁各向异性。辅助记录层15由具有负晶体磁各向异性的材料制成，其易磁化平面是介质的平面。

7. 发明申请

US20080118781A1 Perpendicular Magnetic Recording Media, Production Process Thereof, and Perpendicular Magnetic Recording and Reproducing Apparatus 有权
标题翻译：垂直磁记录介质及其制造方法及垂直磁记录再生装置
公开(公告)号：US20080118781A1
公开(公告)日：2008-05-22
申请号：US11795326
申请日：2006-01-31
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/667 , G11B5/738 , G11B5/82 , G11B5/84 , G11B5/852 , H01F10/26
CPC分类号： G11B5/1278 , G11B5/667 , G11B5/8404 , H01F10/30 , H01F10/3286
摘要： Perpendicular magnetic recording media enabling high-density recording and reproduction of information, as well as a production process thereof, and a magnetic recording and reproducing apparatus, are provided. Perpendicular magnetic recording media, having at least a soft magnetic underlayer and perpendicular magnetic recording layer on a disc-shaped nonmagnetic substrate, in which the soft magnetic underlayer has at least two soft magnetic layers, and Ru or Re between the two soft magnetic layers, are provided; the easy axis of magnetization of the soft magnetic underlayer has a desired direction; the easy axis of magnetization of the soft magnetic underlayer is substantially distributed in a direction except a radial direction of the nonmagnetic substrate, and, the bias magnetic field of the antiferromagnetic coupling in the direction of the easy axis of magnetization of the soft magnetic underlayer is 10 Oersteds (790 A/m) or greater.
摘要翻译：提供了能够进行信息的高密度记录和再现的垂直磁记录介质及其制造过程以及磁记录和再现装置。垂直磁记录介质，其中软磁性底层具有至少两个软磁性层，以及两个软磁性层之间的Ru或Re，在至少具有软磁性底层和垂直磁记录层的盘形非磁性基板上，被提供; 软磁性底层的易磁化轴具有期望的方向; 软磁性底层的易磁化轴基本上分布在除非磁性基板的径向以外的方向上，软磁性底层的易磁化轴方向的反铁磁耦合的偏置磁场为 10奥斯特（790 A / m）或更高。

8. 发明授权

US07943248B2 Perpendicular magnetic recording media, production process thereof, and perpendicular magnetic recording and reproducing apparatus 有权
标题翻译：垂直磁记录介质及其制造方法以及垂直磁记录再生装置
公开(公告)号：US07943248B2
公开(公告)日：2011-05-17
申请号：US11795326
申请日：2006-01-31
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/66
CPC分类号： G11B5/1278 , G11B5/667 , G11B5/8404 , H01F10/30 , H01F10/3286
摘要： Perpendicular magnetic recording media enabling high-density recording and reproduction of information, as well as a production process thereof, and a magnetic recording and reproducing apparatus, are provided. Perpendicular magnetic recording media, having at least a soft magnetic underlayer and perpendicular magnetic recording layer on a disc-shaped nonmagnetic substrate, in which the soft magnetic underlayer has at least two soft magnetic layers, and Ru or Re between the two soft magnetic layers, are provided; the easy axis of magnetization of the soft magnetic underlayer has a desired direction; the easy axis of magnetization of the soft magnetic underlayer is substantially distributed in a direction except a radial direction of the nonmagnetic substrate, and, the bias magnetic field of the antiferromagnetic coupling in the direction of the easy axis of magnetization of the soft magnetic underlayer is 10 Oersteds (790 A/m) or greater.
摘要翻译：提供了能够进行信息的高密度记录和再现的垂直磁记录介质及其制造过程以及磁记录和再现装置。垂直磁记录介质，其中软磁性底层具有至少两个软磁性层，以及两个软磁性层之间的Ru或Re，在至少具有软磁性底层和垂直磁记录层的盘形非磁性基板上，被提供; 软磁性底层的易磁化轴具有期望的方向; 软磁性底层的易磁化轴基本上分布在除非磁性基板的径向以外的方向上，软磁性底层的易磁化轴方向的反铁磁耦合的偏置磁场为 10奥斯特（790 A / m）或更高。

9. 发明申请

US20080037407A1 Method for Manufacturing Perpendicular Magnetic Recording Medium, Perpendicular Magnetic Recording Medium, and Magnetic Recording/Reproducing Apparatus 审中-公开
标题翻译：垂直磁记录介质，垂直磁记录介质和磁记录/再现装置的制造方法
公开(公告)号：US20080037407A1
公开(公告)日：2008-02-14
申请号：US11662492
申请日：2005-09-15
申请人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
发明人： Migaku Takahashi , Masahiro Oka , Akira Kikitsu
IPC分类号： G11B5/84 , G11B5/64 , G11B5/65 , G11B5/82
CPC分类号： G11B5/656 , G11B5/84
摘要： One object of the present invention is to provide a perpendicular magnetic recording medium having a high coercive force by annealing, and in order to achieve the object, the present invention provides a method for manufacturing a perpendicular magnetic recording medium comprising a magnetic recording layer deposited on a non-magnetic substrate, in which at least a magnetic layer containing Co and a diffusive layer are stacked each other, and the stacked layers are annealed to produce a magnetic recording layer.
摘要翻译：本发明的一个目的是提供通过退火具有高矫顽力的垂直磁记录介质，为了实现该目的，本发明提供了一种用于制造垂直磁记录介质的方法，该方法包括沉积在其中至少含有Co和扩散层的磁性层彼此堆叠的非磁性衬底，并且层叠的层被退火以产生磁记录层。

10. 发明授权

US08221637B2 Method and apparatus for manufacturing magnetic recording media 失效
标题翻译：制造磁记录介质的方法和装置
公开(公告)号：US08221637B2
公开(公告)日：2012-07-17
申请号：US12829450
申请日：2010-07-02
申请人： Yoshiyuki Kamata , Katsuyuki Naito , Akira Kikitsu , Masatoshi Sakurai , Masahiro Oka
发明人： Yoshiyuki Kamata , Katsuyuki Naito , Akira Kikitsu , Masatoshi Sakurai , Masahiro Oka
IPC分类号： C23C14/46
CPC分类号： C23F4/00 , B82Y10/00 , G11B5/012 , G11B5/743 , G11B5/82 , G11B5/855 , H01J2237/30466 , H01J2237/3174
摘要： According to one embodiment, a method for manufacturing a magnetic recording medium includes forming patterns having protrusions and recesses of a ferromagnetic material onto a recording track section and a servo section on a substrate, forming a flattening film, a top surface of which is higher than that of the protrusion of the ferromagnetic material, onto the ferromagnetic material, and performing ion beam etching onto the flattening film up to a top surface of the protrusion of the ferromagnetic material, and determining an end point of flattening etching on the basis of a change in the total number of incident particles by means of an ion counter installed so as to be at an angle θ with respect to a perpendicular direction to the substrate in accordance with a material of the flattening film.
摘要翻译：根据一个实施例，一种制造磁记录介质的方法包括将具有铁磁材料的突起和凹陷的图案形成在记录轨道部分和基板上的伺服部分上，形成平坦化膜，其顶表面高于将铁磁材料的突出部分突出到铁磁材料上，并且对平坦化膜进行离子束蚀刻直到铁磁材料的突起的顶表面，并且基于变化确定平坦化蚀刻的终点在通过以与角度为角度安装的离子计数器的入射颗粒的总数中; 相对于基板的垂直方向，根据平坦化膜的材料。

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