公开(公告)号：US07862915B2

公开(公告)日：2011-01-04

申请号：US11640979

申请日：2006-12-19

申请人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

发明人： Tomoyuki Maeda ,  Migaku Takahashi ,  Masahiro Oka

IPC分类号： G11B5/65

CPC分类号： G11B5/7325 ,  G11B5/1278 ,  G11B5/82

摘要： According to one embodiment, a multilayered underlayer including a first underlayer containing Cu aligned in a (111) plane and a second underlayer formed on the Cu underlayer and containing Cu and nitrogen as main components is formed.

摘要翻译： 根据一个实施方案，形成包含在（111）面中排列的Cu的第一底层和形成在Cu底层上并含有Cu和氮作为主要成分的第二底层的多层底层。

公开(公告)号：US20100165510A1

公开(公告)日：2010-07-01

申请号：US12601372

申请日：2008-05-21

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/82

CPC分类号： G11B5/667 ,  G11B5/65 ,  G11B5/66 ,  G11B5/7379

摘要： A magnetic recording medium comprising a substrate, at least one soft magnetic underlayer formed on the substrate, a perpendicular magnetic recording layer formed on the soft magnetic underlayer, and a protective layer formed on the perpendicular magnetic recording layer, is provided wherein the perpendicular magnetic recording layer is comprised of a primary recording layer, a non-magnetic intermediate layer and an auxiliary layer; the primary recording layer comprises magnetic crystal grains and grain boundary portions surrounding the magnetic crystal grains, and has a perpendicular magnetic anisotropy; the auxiliary layer has a negative magneto crystalline anisotropy; and the non-magnetic intermediate layer is formed between the primary recording layer and the auxiliary layer and comprises at least one metal selected from Ru, Rh and Ir, or at least one alloy thereof. This magnetic recording medium exhibits high heat resistance and good recording/reproducing characteristics, and enables a high recording density.

摘要翻译： 一种磁记录介质，其特征在于，包括基板，形成在基板上的至少一个软磁性底层，形成在软磁性底层上的垂直磁记录层和形成在垂直磁记录层上的保护层，其中垂直磁记录 层由主记录层，非磁性中间层和辅助层构成; 主记录层包括磁晶粒和围绕磁晶粒的晶界部分，并且具有垂直的磁各向异性; 辅助层具有负磁结晶各向异性; 并且非磁性中间层形成在初级记录层和辅助层之间，并且包含至少一种选自Ru，Rh和Ir的金属，或其至少一种合金。 该磁记录介质具有高的耐热性和良好的记录/再现特性，并且能够实现高的记录密度。

公开(公告)号：US07618708B2

公开(公告)日：2009-11-17

申请号：US10926868

申请日：2004-08-26

申请人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Andrew Chak Chung Yu ,  Makoto Inoue ,  Migaku Takahashi ,  Kazuyuki Tohji ,  Jeyaderan Balachandran

发明人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Andrew Chak Chung Yu ,  Makoto Inoue ,  Migaku Takahashi ,  Kazuyuki Tohji ,  Jeyaderan Balachandran

IPC分类号： B32B5/16

CPC分类号： B82Y25/00 ,  G11B5/855 ,  Y10T428/254 ,  Y10T428/2991 ,  Y10T428/2995

摘要： An organic layer capable of forming surface areas having an adsorption property different from that of a periphery due to the chemical change of a surface functional group is formed on a board. The surface of the organic layer is patterned and oxidized by a scanning probe microscope to form an array pattern in which small sections for adsorbing nanoparticles are arranged. Then, nanoparticle dispersed solution is applied to the organic layer having the array pattern or the organic layer is dipped in the nanoparticle dispersed solution to form a particle layer on the organic layer. At this time, the nanoparticles in the nanoparticle dispersed solution are respectively fixed only onto the small sections. Therefore, a nanoparticle array on which groups of nanoparticles are arranged in an array can be obtained. Thus, the nanoparticle array on which the groups of the nanoscale particles are arranged on the board is efficiently formed.

摘要翻译： 在板上形成能够形成由于表面官能团的化学变化而具有与周围不同的吸附性的表面积的有机层。 通过扫描探针显微镜对有机层的表面进行图案化和氧化，形成其中排列有用于吸附纳米颗粒的小截面的阵列图案。 然后，将纳米颗粒分散溶液施加到具有阵列图案的有机层，或者将有机层浸渍在纳米颗粒分散溶液中以在有机层上形成颗粒层。 此时，纳米颗粒分散溶液中的纳米颗粒分别仅固定在小部分上。 因此，可以获得纳米颗粒阵列，其中纳米颗粒组排列成阵列。 因此，能够有效地形成纳米级的纳米粒子群配置在基板上的纳米粒子阵列。

公开(公告)号：US20090147401A1

公开(公告)日：2009-06-11

申请号：US12300073

申请日：2007-05-05

申请人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

发明人： Migaku Takahashi ,  Shin Saito ,  Tomoyuki Maeda ,  Akihiko Takeo ,  Yuzo Sasaki ,  Ryuji Sakaguchi

IPC分类号： G11B5/127 ,  G11B5/33

CPC分类号： G11B5/667 ,  G11B5/7325

摘要： The present invention provides a magnetic recording medium capable of recording or reproducing high-density information by reducing the grain size of a perpendicular magnetic recording layer and improving vertical orientation, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. The perpendicular magnetic recording medium includes: a non-magnetic substrate; and at least an soft magnetic layer, an under layer, an intermediate layer, and a perpendicular magnetic recording film that are formed on the non-magnetic substrate. At least one layer of the intermediate layer is made of an alloy material of an element having an fcc structure and an element having a bcc structure or an hcp structure, and has both a crystal structure having (111) orientation and an irregular layer lattice (stacking fault) caused by a mixture of the fcc structure and the bcc structure. The at least one layer of the intermediate layer is made of an alloy material of at least one element that is selected from a group composed of Pt, Ir, Pd, Au, Ni, and Co, which is a main ingredient, and has the fcc structure, and an element having the bcc structure or the hcp structure.

摘要翻译： 本发明提供一种能够通过减小垂直磁记录层的晶粒尺寸并提高垂直取向来记录或再现高密度信息的磁记录介质，其制造方法和磁记录/再现装置。 垂直磁记录介质包括：非磁性基板; 以及形成在非磁性基板上的至少软磁性层，下层，中间层和垂直磁记录膜。 中间层的至少一层由具有fcc结构的元素和具有bcc结构或hcp结构的元素的合金材料制成，并且具有具有（111）取向的晶体结构和不规则层晶格（ 堆叠故障）由fcc结构和bcc结构的混合引起。 中间层的至少一层由选自由作为主要成分的Pt，Ir，Pd，Au，Ni和Co组成的组中的至少一种元素的合金材料制成，并且具有 fcc结构，以及具有bcc结构或hcp结构的元素。

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。

公开(公告)号：US20050158585A1

公开(公告)日：2005-07-21

申请号：US10509244

申请日：2003-03-20

申请人： Migaku Takahashi ,  Shin Saito ,  David Djayaprawira

发明人： Migaku Takahashi ,  Shin Saito ,  David Djayaprawira

IPC分类号： B32B15/01 ,  C22C38/02 ,  C22C38/06 ,  C23C28/00 ,  G11B5/66 ,  G11B5/667 ,  G11B5/73 ,  G11B5/84 ,  G11B5/851 ,  H01F10/14 ,  H01F41/14 ,  B05D5/12

CPC分类号： C22C38/02 ,  B32B15/01 ,  C22C38/06 ,  C23C28/321 ,  C23C28/34 ,  C23C28/343 ,  C23C28/347 ,  G11B5/66 ,  G11B5/667 ,  G11B5/8404 ,  G11B5/851 ,  Y10T428/265

摘要： A vertical magnetic recording medium has a low-noise characteristic compared to media of a permalloy or sendust crystalline material, including a high-flatness soft magnetic backing layer, and enabling recording/reproduction of information at high recording density, a magnetic recorder provided with the vertical magnetic recording medium, a vertical magnetic recording medium manufacturing method and apparatus. The vertical magnetic recording medium has a multilayer structure on a substrate, in which a soft magnetic backing layer, a vertical recording layer of a ferromagnetic body, and a protective layer are formed. The soft magnetic backing layer is formed of an FeSiAlN film of a soft magnetic material. The atom % of each element of Fe, Si, Al, and N of the FeSiAlN film can be changed by changing the flow rate of N2 gas in a mixture gas of N2 gas and Ar gas introduced into the chamber.

摘要翻译： 垂直磁记录介质与坡莫合金或铁硅铝结晶材料的介质相比具有低噪声特性，包括高平坦度软磁背衬层，并且能够以高记录密度记录/再现信息，磁记录器具有 垂直磁记录介质，垂直磁记录介质制造方法和装置。 垂直磁记录介质在其上形成软磁背衬层，铁磁体垂直记录层和保护层的基板上具有多层结构。 软磁背衬层由软磁材料的FeSiAlN膜形成。 FeSiAlN膜的Fe，Si，Al和N的各元素的原子％可以通过改变引入到室中的N 2气体和Ar气体的混合气体中的N 2气体的流量来改变。

公开(公告)号：US20130257573A1

公开(公告)日：2013-10-03

申请号：US13825584

申请日：2011-09-22

申请人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Akimasa Sakuma ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

发明人： Migaku Takahashi ,  Tomoyuki Ogawa ,  Yasunobu Ogata ,  Akimasa Sakuma ,  Naoya Kobayashi ,  Chammika Ruwan Polwatta Gallage ,  Kaori Kohara

IPC分类号： H01F7/02 ,  H01F41/02

CPC分类号： H01F7/02 ,  B22F9/22 ,  B22F2998/10 ,  B22F2999/00 ,  B82Y30/00 ,  C01B21/0602 ,  C01B21/0622 ,  C01P2004/62 ,  C01P2004/64 ,  C01P2006/12 ,  C01P2006/42 ,  C22C29/16 ,  H01F1/065 ,  H01F1/083 ,  H01F41/02 ,  Y10T428/2982 ,  B22F2201/013 ,  B22F1/0088 ,  B22F2201/016 ,  C22C33/0235 ,  B22F1/0085

摘要： The present invention relates to ferromagnetic particles comprising an Fe16N2 compound phase in an amount of not less than 70% as measured by Mössbauer spectrum, and at least one metal element X selected from the group consisting of Mn, Ni, Ti, Ga, Al, Ge, Zn, Pt and Si in such an amount that a molar ratio of the metal element X to Fe is 0.04 to 25%, the ferromagnetic particles having a BHmax value of not less than 5 MGOe, and a process for producing the ferromagnetic particles, and further relates to an anisotropic magnet or a bonded magnet which is obtained by magnetically orienting the ferromagnetic particles. The ferromagnetic particles according to the present invention can be produced in an industrial scale and are in the form of Fe16N2 particles comprising different kinds of metal elements having a large BHmax value.

摘要翻译： 本发明涉及由Mössbauer光谱测定的不少于70％的Fe 16 N 2化合物相和至少一种选自Mn，Ni，Ti，Ga，Al的金属元素X的铁磁性颗粒， Ge，Zn，Pt和Si，金属元素X与Fe的摩尔比为0.04〜25％，BHmax值为5MGOe以上的铁磁性粒子，以及铁磁性粒子的制造方法 并且还涉及通过磁性取向铁磁性颗粒获得的各向异性磁体或粘结磁体。 根据本发明的铁磁颗粒可以以工业规模生产，并且是包含具有大的BHmax值的不同种类的金属元素的Fe16N2颗粒的形式。

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。

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。

公开(公告)号：US07297423B2

公开(公告)日：2007-11-20

申请号：US11067137

申请日：2005-02-25

申请人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Makoto Inoue ,  Kenji Yazawa ,  Migaku Takahashi ,  Yasuo Tateno ,  Teiichi Miyauchi

发明人： Mikihisa Mizuno ,  Yuichi Sasaki ,  Makoto Inoue ,  Kenji Yazawa ,  Migaku Takahashi ,  Yasuo Tateno ,  Teiichi Miyauchi

IPC分类号： B01J13/12

CPC分类号： H01P3/081 ,  H05K1/0233 ,  H05K1/0373 ,  H05K2201/0215 ,  H05K2201/086 ,  Y10T428/24917 ,  Y10T428/25 ,  Y10T428/257 ,  Y10T428/31609

摘要： A PCB that can transmit a high frequency signal of a GHz band with a low loss includes an insulator and magnetic nanoparticles dispersed in the insulator.

摘要翻译： 可以以低损耗传输GHz频带的高频信号的PCB包括分散在绝缘体中的绝缘体和磁性纳米颗粒。