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1.发明授权公开(公告)号：US06893746B1
公开(公告)日：2005-05-17
申请号：US10111608
申请日：2000-10-30
申请人： Fumiyoshi Kirino , Norio Ohta , Kouichirou Wakabayashi , Teruaki Takeuchi , Harumi Hieida , Masaki Sekine , Hiroyuki Awano , Akira Yano , Satoshi Matsunuma , Nobuyuki Inaba , Tetsunori Koda
发明人： Fumiyoshi Kirino , Norio Ohta , Kouichirou Wakabayashi , Teruaki Takeuchi , Harumi Hieida , Masaki Sekine , Hiroyuki Awano , Akira Yano , Satoshi Matsunuma , Nobuyuki Inaba , Tetsunori Koda
CPC分类号： G11B5/65 , G11B5/00 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/7325 , G11B5/74 , G11B5/82 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagnetic film is composed of a magnetic material which has saturation magnetization larger than that of the information-recording film. Accordingly, the leak magnetic flux from the ferromagnetic film is larger than that from the information-recording film. The magnetic recording medium and a magnetic recording apparatus are obtained, which are excellent in thermal stability and which are preferred to perform super high density recording.
摘要翻译： 磁记录介质包括在基板上的信息记录膜和铁磁膜。 信息记录膜由例如具有垂直磁化的非晶铁磁材料构成。 此外，铁磁膜由具有比信息记录膜的饱和磁化强度大的饱和磁化强度的磁性材料构成。 因此，来自铁磁膜的泄漏磁通量大于来自信息记录膜的漏磁通量。 获得磁性记录介质和磁记录装置，其热稳定性优异，并且优选进行超高密度记录。
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2.发明授权公开(公告)号：US06699602B2
公开(公告)日：2004-03-02
申请号：US10084944
申请日：2002-03-01
申请人： Mitsutoshi Honda , Hiroki Yamamoto , Takashi Naito , Tatsumi Hirano , Tetsuo Nakazawa , Fumiyoshi Kirino , Teruaki Takeuchi , Akira Yano , Nobuyuki Inaba , Satoshi Matsunuma
发明人： Mitsutoshi Honda , Hiroki Yamamoto , Takashi Naito , Tatsumi Hirano , Tetsuo Nakazawa , Fumiyoshi Kirino , Teruaki Takeuchi , Akira Yano , Nobuyuki Inaba , Satoshi Matsunuma
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/72 , G11B5/8404 , G11B5/8408 , Y10S428/90 , Y10T428/12465 , Y10T428/12618
摘要： An amorphous magnetic recording medium comprising a substrate and an amorphous magnetic layer, where a magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical phases vertically stacked one upon another in the main phase is formed on the top side or the bottom side directly or through at least one of other layers to bring the amorphous magnetic layer into a finer magnetic domain structure, can satisfy high density recording.
摘要翻译： 一种非晶磁记录介质，包括基板和非晶磁性层，其中包括主相的磁畴形成控制层和主相中的水平排列的1至3种离散的球形隔离相或1至3种 在主相中垂直层叠的离散球相直接或通过其它层中的至少一个形成在顶侧或底侧，以使非晶磁性层进入更细的磁畴结构，可以满足高密度记录。
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3.发明授权公开(公告)号：US06815098B2
公开(公告)日：2004-11-09
申请号：US10411299
申请日：2003-04-11
申请人： Satoshi Matsunuma , Akira Yano , Tsuyoshi Onuma , Takanobu Takayama , Harumi Hieida , Kouichirou Wakabayashi
发明人： Satoshi Matsunuma , Akira Yano , Tsuyoshi Onuma , Takanobu Takayama , Harumi Hieida , Kouichirou Wakabayashi
IPC分类号： G11B566
CPC分类号： G11B5/00 , G11B5/012 , G11B5/66 , G11B5/74 , G11B5/851 , Y10S428/90 , Y10T428/12465 , Y10T428/12868 , Y10T428/265
摘要： A magnetic recording medium comprises, on a substrate, a soft magnetic layer, a first seed layer, a second seed layer, and a recording layer having an artificial lattice structure. The first seed layer contains oxide of Fe. The second seed layer contains one of Pd and Pt, Si, and N. The magnetic exchange coupling force in the in-plane direction of the recording layer is weakened by the first seed layer and the second seed layer. Accordingly, minute recording magnetic domains can be formed in the recording layer, and the magnetization transition area is distinct as well. Even when information is recorded at a high density, the information can be reproduced with low noise. A magnetic storage apparatus, which is provided with such a magnetic recording medium, makes it possible to achieve an areal recording density of 150 gigabits/square inch.
摘要翻译： 磁记录介质在基板上包括软磁层，第一晶种层，第二晶种层和具有人造晶格结构的记录层。 第一种子层含有Fe的氧化物。 第二种子层包含Pd和Pt，Si和N中的一个。记录层的面内方向上的磁交换耦合力被第一种子层和第二种子层削弱。 因此，可以在记录层中形成分钟记录磁畴，并且磁化过渡区也是不同的。 即使当以高密度记录信息时，可以以低噪声再现信息。 具有这种磁记录介质的磁存储装置使得可以实现150吉比特/平方英寸的面积记录密度。
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公开(公告)号：US06602621B2
公开(公告)日：2003-08-05
申请号：US10026636
申请日：2001-12-27
申请人： Satoshi Matsunuma , Akira Yano , Tsuyoshi Onuma , Takanobu Takayama , Harumi Hieida , Kouichirou Wakabayashi
发明人： Satoshi Matsunuma , Akira Yano , Tsuyoshi Onuma , Takanobu Takayama , Harumi Hieida , Kouichirou Wakabayashi
IPC分类号： G11B566
CPC分类号： G11B5/00 , G11B5/012 , G11B5/66 , G11B5/74 , G11B5/851 , Y10S428/90 , Y10T428/12465 , Y10T428/12868 , Y10T428/265
摘要： A magnetic recording medium comprises, on a substrate, a soft magnetic layer, a first seed layer, a second seed layer, and a recording layer having an artificial lattice structure. The first seed layer contains oxide of Fe. The second seed layer contains one of Pd and Pt, Si, and N. The magnetic exchange coupling force in the in-plane direction of the recording layer is weakened by the first seed layer and the second seed layer. Accordingly, minute recording magnetic domains can be formed in the recording layer, and the magnetization transition area is distinct as well. Even when information is recorded at a high density, the information can be reproduced with low noise. A magnetic storage apparatus, which is provided with such a magnetic recording medium, makes it possible to achieve an areal recording density of 150 gigabits/square inch.
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5.发明授权公开(公告)号：US06863998B2
公开(公告)日：2005-03-08
申请号：US10307301
申请日：2002-12-02
IPC分类号： G11B5/64 , G11B5/65 , G11B5/667 , G11B5/73 , G11B5/738 , G11B5/851 , H01F10/16 , G11B5/66 , G11B5/70
CPC分类号： G11B5/667 , G11B5/653 , G11B5/7325 , G11B5/851 , Y10S428/90
摘要： A magnetic recording medium 100 comprises, on a substrate 1, a first orientation control layer 2, a second orientation control layer 4, a soft magnetic layer 6, a non-magnetic layer 8, a recording layer 12, and a carbon protective layer 14. The recording layer 12 is formed of an FePt ordered alloy phase which exhibits ferromagnetism and an FePt3 ordered alloy phase which exhibits paramagnetism. Accordingly, the magnetic coupling force, which acts between those of the FePt ordered alloy phase, is broken by the paramagnetic FePt3 ordered alloy phase. The magnetic interaction between those of the FePt ordered alloy phase is reduced, and thus the noise is reduced. Further, the high density recording can be performed, and the medium is excellent in thermal stability, because the FePt ordered alloy having high crystalline magnetic anisotropy is used for the recording layer 12.
摘要翻译： 磁记录介质100在基板1上包括第一取向控制层2，第二取向控制层4，软磁层6，非磁性层8，记录层12和碳保护层14 记录层12由显示铁磁性的FePt有序合金相和显示顺磁性的FePt 3有序合金相形成。 因此，作用于FePt有序合金相的磁耦合力被顺磁性FePt3有序合金相破坏。 FePt有序合金相的磁相互作用减小，噪声降低。 此外，可以进行高密度记录，并且由于具有高结晶磁各向异性的FePt有序合金用于记录层12，介质的热稳定性优异。
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公开(公告)号：US07348077B2
公开(公告)日：2008-03-25
申请号：US10930755
申请日：2004-09-01
申请人： Enji Fujita , Hideaki Yamanaka , Tsuyoshi Onuma , Satoshi Matsunuma , Akira Yano , Tetsunori Koda , Katsusuke Shimazaki
发明人： Enji Fujita , Hideaki Yamanaka , Tsuyoshi Onuma , Satoshi Matsunuma , Akira Yano , Tetsunori Koda , Katsusuke Shimazaki
CPC分类号： G11B5/66 , G11B5/656 , G11B5/667 , G11B5/732 , G11B5/7325
摘要： A magnetic recording medium based on the perpendicular magnetic recording system includes a substrate; a back layer which is formed on the substrate and which is formed of a soft magnetic material; an in-plane magnetized layer which is formed on the back layer and which has in-plane magnetization; and a recording layer which is formed on the in-plane magnetized layer and which has perpendicular magnetization, wherein the in-plane magnetized layer has a coercivity in an in-plane direction larger than a magnetic field generated by residual magnetization in a perpendicular direction of the recording layer. The influence on the reproduction output, caused by the mirror image effect of the soft magnetic back layer is reduced in wide range recording densities, thereby improving the resolution by decreasing the difference between the reproduction outputs of the magnetic recording medium at the low recording density and at the high recording density.
摘要翻译： 基于垂直磁记录系统的磁记录介质包括基板; 背衬层，其形成在所述基板上并且由软磁性材料形成; 面内磁化层，其形成在背层上并具有面内磁化; 以及形成在所述面内磁化层上并且具有垂直磁化的记录层，其中所述面内磁化层的面内方向的矫顽力大于在垂直方向上的残余磁化产生的磁场的矫顽力 录音层。 在宽范围的记录密度下，由软磁背层的镜像效果引起的对再现输出的影响减小，从而通过将低记录密度的磁记录介质的再现输出与 在高记录密度。
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公开(公告)号：US20050048321A1
公开(公告)日：2005-03-03
申请号：US10930755
申请日：2004-09-01
申请人： Enji Fujita , Hideaki Yamanaka , Tsuyoshi Onuma , Satoshi Matsunuma , Akira Yano , Tetsunori Koda , Katsusuke Shimazaki
发明人： Enji Fujita , Hideaki Yamanaka , Tsuyoshi Onuma , Satoshi Matsunuma , Akira Yano , Tetsunori Koda , Katsusuke Shimazaki
CPC分类号： G11B5/66 , G11B5/656 , G11B5/667 , G11B5/732 , G11B5/7325
摘要： A magnetic recording medium based on the perpendicular magnetic recording system includes a substrate; a back layer which is formed on the substrate and which is formed of a soft magnetic material; an in-plane magnetized layer which is formed on the back layer and which has in-plane magnetization; and a recording layer which is formed on the in-plane magnetized layer and which has perpendicular magnetization, wherein the in-plane magnetized layer has a coercivity in an in-plane direction larger than a magnetic field generated by residual magnetization in a perpendicular direction of the recording layer. The influence on the reproduction output, caused by the mirror image effect of the soft magnetic back layer is reduced in wide range recording densities, thereby improving the resolution by decreasing the difference between the reproduction outputs of the magnetic recording medium at the low recording density and at the high recording density.
摘要翻译： 基于垂直磁记录系统的磁记录介质包括基板; 背衬层，其形成在所述基板上并且由软磁性材料形成; 面内磁化层，其形成在背层上并具有面内磁化; 以及形成在所述面内磁化层上并且具有垂直磁化的记录层，其中所述面内磁化层的面内方向的矫顽力大于在垂直方向上的残余磁化产生的磁场的矫顽力 录音层。 在宽范围的记录密度下，由软磁背层的镜像效果引起的对再现输出的影响减小，从而通过将低记录密度的磁记录介质的再现输出与 在高记录密度。
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8.发明授权公开(公告)号：US06994923B2
公开(公告)日：2006-02-07
申请号：US10460197
申请日：2003-06-13
申请人： Tetsunori Koda , Akira Yano , Enji Fujita , Tsuyoshi Onuma , Satoshi Matsunuma
发明人： Tetsunori Koda , Akira Yano , Enji Fujita , Tsuyoshi Onuma , Satoshi Matsunuma
摘要： A magnetic recording medium in which the medium noise is reduced and information can be recorded at a high S/N level, and a method for producing the magnetic recording medium are provided. A magnetic recording apparatus, which is excellent in thermal stability and which makes it possible to perform the high density recording, is provided. When films are formed for the magnetic recording medium based on the perpendicular magnetic recording method, the content of B in a seed layer is made sufficiently larger than the content of B in a recording layer. Accordingly, B is diffused from the seed layer to the recording layer to facilitate the segregation of B at the crystal grain boundary in the recording layer. Thereby, the magnetic interaction between the crystal grains in the recording layer is further reduced. Thus, it is possible to greatly reduce the transition noise.
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公开(公告)号：US07050253B2
公开(公告)日：2006-05-23
申请号：US10404071
申请日：2003-04-02
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： G11B5/02
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, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means 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 the 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.
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公开(公告)号：US06221508B1
公开(公告)日：2001-04-24
申请号：US09206869
申请日：1998-12-08
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： C23C1500
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, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means 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 magneto-resistance 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 the 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，用于使磁头相对于磁体相对移动的装置 记录介质和记录/重放信号处理器装置，用于对磁头执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的磁头组成 所述磁记录介质被构造成包括基板和形成在其上的一个或多个底层之间形成的磁性层，其中至少一个底层是由其中含有Ni的非晶或微晶材料制成的特定层 作为其主要成分或主要成分，还含有至少一种 选自Nb和Ta的元素。
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