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公开(公告)号：US09818441B2
公开(公告)日：2017-11-14
申请号：US13577085
申请日：2011-02-03
CPC分类号： G11B5/7325 , G11B5/314 , G11B5/65 , G11B2005/0005 , G11B2005/0021
摘要： Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L10 structure, characterized in that at least one of the underlayers is predominantly comprised of MgO and comprises at least one oxide selected from SiO2, TiO2, Cr2O3, Al2O3, Ta2O5, ZrO2, Y2O3, CeO2, MnO, TiO and ZnO. The thermally assisted magnetic recording medium has a magnetic layer comprised of fine magnetic crystal grains, exhibiting a sufficiently weak exchange coupling between magnetic grains, and having a minimized coercive force dispersion.
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2.发明授权Method for manufacturing magnetic recording medium, and magnetic recording/reproducing apparatus 有权磁记录介质的制造方法以及磁记录/重放装置公开(公告)号：US09449632B2
公开(公告)日：2016-09-20
申请号：US13432931
申请日：2012-03-28
IPC分类号： C23C14/34 , G11B5/73 , C23C14/00 , C23C14/16 , C30B23/02 , C30B29/52 , G11B5/65 , G11B5/66 , C30B23/00 , G11B5/851
CPC分类号： G11B5/7325 , C23C14/0036 , C23C14/0042 , C23C14/165 , C30B23/002 , C30B23/025 , C30B29/52 , G11B5/656 , G11B5/66 , G11B5/851
摘要： A method for manufacturing a magnetic recording medium including at least a non-magnetic substrate, a soft magnetic underlayer, an orientation control layer that controls an orientation of an immediate upper layer, and a perpendicular magnetic layer in which a magnetization easy axis is mainly perpendicularly oriented with respect to the non-magnetic substrate so as to be laminated one another on the non-magnetic substrate. The perpendicular magnetic layer includes two or more magnetic layers, and each layer is subjected to a crystal growth such that each crystal grain composing each magnetic layer forms a columnar crystal continuous in a thickness direction together with the crystal grains composing the orientation control layer. The orientation control layer, formed of a Co—Cr alloy, is formed by the reactive sputtering using a mixture of a sputtering gas and nitrogen.
摘要翻译： 一种制造磁记录介质的方法，所述磁记录介质至少包括非磁性基板，软磁性底层，控制立即上层的取向的取向控制层以及磁化容易轴主要垂直的垂直磁性层 相对于非磁性基板被定向以在非磁性基板上彼此层叠。 垂直磁性层包含两层以上的磁性层，各层进行晶体生长，使构成各磁性层的各晶粒与构成取向控制层的晶粒一起形成与厚度方向连续的柱状晶体。 通过使用溅射气体和氮气的混合物的反应溅射形成由Co-Cr合金形成的取向控制层。
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3.发明授权公开(公告)号：US08351309B2
公开(公告)日：2013-01-08
申请号：US13033010
申请日：2011-02-23
IPC分类号： G11B7/085
CPC分类号： G11B5/65 , G11B5/7325 , G11B2005/0021
摘要： Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L10 structure, characterized in that at least one of the underlayers is predominantly comprised of MgO and comprises at least one kind of a metal element having a melting point of at least 2,000° C., such as Nb, Mo, Ru, Ta or W. The thermally assisted magnetic recording medium has magnetic crystal grains having uniform size in the magnetic layer, and has a narrow switching field distribution (SFD), and a magnetic recording storage provided with the thermally assisted magnetic recording medium exhibits a high SN ratio.
摘要翻译： 公开了一种热辅助磁记录介质，其包括基板，形成在基板上的多个底层，以及形成在底层上的主要由具有L10结构的合金组成的磁性层，其特征在于，至少一个 底层主要由MgO组成，并且包括至少一种熔点至少为2000℃的金属元素，例如Nb，Mo，Ru，Ta或W.该热辅助磁记录介质具有磁性晶粒 在磁性层中具有均匀的尺寸，并且具有窄的开关场分布（SFD），并且设置有热辅助磁记录介质的磁记录存储体呈现高SN比。
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公开(公告)号：US20110293966A1
公开(公告)日：2011-12-01
申请号：US13115744
申请日：2011-05-25
IPC分类号： G11B5/64
摘要： A magnetic recording medium which has been made by forming at least one magnetic layer having a granular structure on a substrate by sputtering, wherein said at least one magnetic recording layer having a granular structure comprises magnetic grains separated from each other by an oxide, and is made by sputtering a target comprising cobalt oxide and substantially free from metallic chromium and a chromium alloy. The magnetic grains in the granular structure have an average grain diameter of not larger than 6 nm, and are separated from each other by the oxide with a grain boundary width of at least 1.5 nm. The magnetic grains are minute and separated from each other with an enhanced grain boundary width, and the magnetic recording medium exhibits an enhanced recording density and improved electromagnetic conversion characteristics.
摘要翻译： 一种磁记录介质，其通过溅射在基板上形成具有颗粒结构的至少一个磁性层而制成的，其中所述至少一个具有颗粒结构的磁记录层包括通过氧化物彼此分离的磁性颗粒，并且是 通过溅射包含氧化钴并且基本上不含金属铬和铬合金的靶制成。 颗粒状结构中的磁性颗粒的平均粒径不大于6nm，并且通过具有至少1.5nm的晶界宽度的氧化物彼此分离。 磁性颗粒是微小的并且具有增加的晶界宽度彼此分离，并且磁记录介质表现出增强的记录密度和改善的电磁转换特性。
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5.发明授权公开(公告)号：US08034471B2
公开(公告)日：2011-10-11
申请号：US12536225
申请日：2009-08-05
申请人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
发明人： Shinichi Ishibashi , Migaku Takahashi , Shin Saito , Yuzo Sasaki , Atsushi Hashimoto , Gohei Kurokawa , Tomoyuki Maeda , Akihiko Takeo
IPC分类号： G11B5/66
摘要： In a perpendicular magnetic recording medium in which at least a soft magnetic underlayer, an orientation control layer, a magnetic recording layer and a protective layer are formed on a non-magnetic substrate in order from the bottom, the orientation control layer has a laminated structure of two or more layers including an intermediate layer and a seed layer which is disposed closer to the non-magnetic substrate than the intermediate layer. The seed layer includes two or more kinds of elements having a face-centered cubic structure, has face-centered cubic (111) plane crystals oriented in a direction perpendicular to a substrate surface, and has a pseudo-hexagonal structure.
摘要翻译： 在从底部起依次形成至少软磁性底层，取向控制层，磁记录层和保护层的垂直磁记录介质中，取向控制层具有层叠结构 包括比中间层更靠近非磁性基板设置的中间层和种子层的两层以上的层。 种子层包括具有面心立方结构的两种或更多种元件，具有在垂直于衬底表面的方向上取向的面心立方（111）面晶体，并且具有假六边形结构。
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6.发明申请公开(公告)号：US20110205862A1
公开(公告)日：2011-08-25
申请号：US13033010
申请日：2011-02-23
CPC分类号： G11B5/65 , G11B5/7325 , G11B2005/0021
摘要： Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of underlayers formed on the substrate, and a magnetic layer which is formed on the underlayers and predominantly comprised of an alloy having a L10 structure, characterized in that at least one of the underlayers is predominantly comprised of MgO and comprises at least one kind of a metal element having a melting point of at least 2,000° C., such as Nb, Mo, Ru, Ta or W. The thermally assisted magnetic recording medium has magnetic crystal grains having uniform size in the magnetic layer, and has a narrow switching field distribution (SFD), and a magnetic recording storage provided with the thermally assisted magnetic recording medium exhibits a high SN ratio.
摘要翻译： 公开了一种热辅助磁记录介质，其包括基板，形成在基板上的多个底层，以及形成在底层上的主要由具有L10结构的合金组成的磁性层，其特征在于，至少一个 底层主要由MgO组成，并且包括至少一种熔点至少为2000℃的金属元素，例如Nb，Mo，Ru，Ta或W.该热辅助磁记录介质具有磁性晶粒 在磁性层中具有均匀的尺寸，并且具有窄的开关场分布（SFD），并且设置有热辅助磁记录介质的磁记录存储体呈现高SN比。
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7.发明申请公开(公告)号：US20100209741A1
公开(公告)日：2010-08-19
申请号：US12670815
申请日：2008-07-25
申请人： Yuzo Sasaki , Atsushi Hashimoto
发明人： Yuzo Sasaki , Atsushi Hashimoto
摘要： A perpendicular magnetic recording medium is provided, which has a soft magnetic layer, an under layer, an intermediate layer and a perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer is comprised of at least one magnetic layer, which magnetic layer or at least one of which magnetic layers comprises cobalt-based ferromagnetic crystal grains and grain boundaries comprised of an oxide, wherein the ferromagnetic crystal grains further comprise ruthenium. The perpendicular magnetic recording medium has ferromagnetic crystal grains with extremely small grain size and exhibiting enhanced discretion, as well as good perpendicular orientation in the perpendicular magnetic recording layer, and thus, the medium is capable of recording and reproducing information with high density.
摘要翻译： 提供一种具有软磁层，下层，中间层和垂直磁记录层的垂直磁记录介质，其特征在于垂直磁记录层由至少一个磁性层组成，该磁性层 层或其中至少一个磁性层包括钴基铁磁晶粒和由氧化物组成的晶界，其中铁磁晶粒还包含钌。 垂直磁记录介质具有极小的晶粒尺寸的铁磁晶粒，并且在垂直磁记录层中表现出增强的判断力以及良好的垂直取向，因此该介质能够高密度地记录和再现信息。
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公开(公告)号：US07106953B2
公开(公告)日：2006-09-12
申请号：US09887587
申请日：2001-06-22
CPC分类号： H04N5/91 , G11B27/105 , G11B27/329 , G11B2220/20 , H04N5/765 , H04N5/775
摘要： An audio and video recording and reproduction apparatus of the present invention is an audio and video recording and reproduction apparatus, comprising: an input switching device for switching an input between a first input signal including a first audio and video signal which is input from a first input, a second input signal including a second audio and video signal which is input from a second input, and a third input signal including a third audio and video signal which is input from a third input, and for outputting one of the first signal, the second signal, and the third signal; and a recording device for recording the second input signal and the third input signal on the information recording medium as one recording unit when the input switching device switches the input from the second input signal to the third input signal.
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9.发明授权Graft copolymer, thermoplastic resin composition, molded article, and method for producing graft copolymer 有权接枝共聚物，热塑性树脂组合物，成型品和接枝共聚物的制造方法公开(公告)号：US09556302B2
公开(公告)日：2017-01-31
申请号：US14232116
申请日：2012-07-11
申请人： Takumi Miyahiro , Masanori Ito , Seiji Tamai , Fumitoshi Takeda , Kazunori Takahashi , Tomoyoshi Akiyama , Hajime Tomita , Haruki Okuno , Shunsaku Kubota , Masaaki Okada , Atsushi Hashimoto , Yoshiaki Takada , Nobuyuki Nakashima , Jiichiro Yoshida , Takayoshi Fujiwara , Shouta Kosaka
发明人： Takumi Miyahiro , Masanori Ito , Seiji Tamai , Fumitoshi Takeda , Kazunori Takahashi , Tomoyoshi Akiyama , Hajime Tomita , Haruki Okuno , Shunsaku Kubota , Masaaki Okada , Atsushi Hashimoto , Yoshiaki Takada , Nobuyuki Nakashima , Jiichiro Yoshida , Takayoshi Fujiwara , Shouta Kosaka
IPC分类号： C08L69/00 , C08L77/00 , C08L25/12 , C08F212/08 , C08F285/00 , C08L51/04 , C08F265/04 , C08F297/02
CPC分类号： C08F285/00 , C08F212/08 , C08F220/44 , C08F265/04 , C08F297/02 , C08L25/12 , C08L51/04 , C08L69/00 , C08L77/00 , Y10T428/254 , C08L51/003
摘要： Provided is a thermoplastic resin composition having excellent weather resistance, impact resistance, and fluidity and also excellent color developing properties and residence heat stability. A graft copolymer (A) prepared by graft polymerization of a certain amount of a specific monomer (a2)onto a certain amount of composite rubber (a1) composed of a conjugated diene rubber polymer and a cross-linked acrylic ester polymer. The tetrahydrofuran-soluble portion of the composite rubber (a1) has a weight-average molecular weight of 50000 or more in terms of polystyrene and a degree of swelling in toluene of 7.0 or more, or in the composite rubber contained in the graft copolymer, the number of particles having an equivalent-circle diameter of 150 nm or less is 50% or less of the total number of the composite rubber particles.
摘要翻译： 本发明提供耐候性，耐冲击性，流动性优异，显色性和停留热稳定性优异的热塑性树脂组合物。 通过将一定量的特定单体（a2）接枝聚合到由共轭二烯橡胶聚合物和交联丙烯酸酯聚合物构成的一定量的复合橡胶（a1）上制备的接枝共聚物（A）。 复合橡胶（a1）的四氢呋喃可溶部分的聚苯乙烯换算的重均分子量为50000以上，甲苯的溶胀度为7.0以上，或接枝共聚物中所含的复合橡胶中， 当量圆直径为150nm以下的粒子数为复合橡胶粒子总数的50％以下。
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公开(公告)号：US09245563B2
公开(公告)日：2016-01-26
申请号：US14114641
申请日：2012-05-14
申请人： Atsushi Hashimoto
发明人： Atsushi Hashimoto
CPC分类号： G11B5/667 , G11B5/732 , Y10T156/10
摘要： Provided is a magnetic recording medium which maintains high vertical orientation of a vertical magnetic layer, and which is capable of realizing high recording densification. In the magnetic recording medium, at least a soft magnetic underlying layer (30), seed layers (31, 32), an orientation control layer (33), and a vertical magnetic layer are laminated in this order on the non-magnetic substrate. The soft magnetic underlying layer (30) has an amorphous or microcrystalline structure. The seed layers (31, 32) include a first seed layer (31) formed from a metal oxide or a metal nitride, and a second seed layer (32) which is formed on the first seed layer and is formed from a metal formed with an island-shape or a net shape. In the orientation control layer (33) and the vertical magnetic layer, respective crystal grains constitute columnar crystals that are continuous in a thickness direction based on the second seed layer (32).
摘要翻译： 提供了一种保持垂直磁性层的高垂直取向并且能够实现高记录致密化的磁记录介质。 在磁记录介质中，至少一个软磁下层（30），种子层（31,32），取向控制层（33）和垂直磁性层依次层叠在非磁性基板上。 软磁下层（30）具有非晶或微晶结构。 种子层（31,32）包括由金属氧化物或金属氮化物形成的第一种子层（31）和形成在第一籽晶层上并由形成有金属氧化物的金属形成的第二籽晶层（32） 岛状或网状。 在取向控制层（33）和垂直磁性层中，各晶粒构成基于第二籽晶层（32）在厚度方向上连续的柱状晶体。
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