公开(公告)号：US20100079911A1

公开(公告)日：2010-04-01

申请号：US12597699

申请日：2008-04-28

申请人： Ryuji Sakaguchi ,  Gouhei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra Singh

发明人： Ryuji Sakaguchi ,  Gouhei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra Singh

IPC分类号： G11B5/127 ,  G11B5/66 ,  G11B5/667 ,  B05D5/12

CPC分类号： G11B5/65 ,  G11B5/66

摘要： A perpendicular magnetic recording medium is provided, which has a backing layer, a primer layer, an intermediate layer and at least one perpendicular magnetic recording layer, and is characterized in that the perpendicular magnetic recording layer contains Co and Cr, and at least one of the perpendicular magnetic recording layer or layers has a granular structure comprising ferromagnetic crystal grains and grain boundaries comprised of non-magnetic tungsten oxide. The perpendicular magnetic recording layer may be a double-layered structure comprising the tungsten oxide grain boundary-containing layer and a Cr oxide, Si oxide, Ta oxide or Ti oxide grain boundary-containing layer formed on the tungsten oxide grain boundary-containing layer. The perpendicular magnetic recording medium exhibits good perpendicular orientation and has ferromagnetic crystal grains with extremely small grain size, and thus, is superior in high recording density characteristic.

摘要翻译： 提供了一种具有背衬层，底漆层，中间层和至少一个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含有Co和Cr，并且其中至少一个 垂直磁记录层具有包含铁磁晶粒和由非磁性氧化钨构成的晶界的粒状结构。 垂直磁记录层可以是包含形成在氧化钨晶界含有层上的氧化钨晶界层和在氧化钨晶界含有层上形成的Cr氧化物，氧化硅，氧化物或氧化钛晶界的层的双层结构。 垂直磁记录介质具有良好的垂直取向，并且具有极小晶粒尺寸的铁磁晶粒，因此具有优异的高记录密度特性。

公开(公告)号：US20100247961A1

公开(公告)日：2010-09-30

申请号：US12525943

申请日：2008-01-16

申请人： Ryuji Sakaguchi ,  Gohei Kurokawak ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra K. Singh

发明人： Ryuji Sakaguchi ,  Gohei Kurokawak ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra K. Singh

IPC分类号： G11B5/33

CPC分类号： G11B5/8404 ,  G11B5/7325

摘要： In a perpendicular magnetic recording medium having at least a soft magnetic back layer, an underlayer, an intermediate layer and a perpendicular magnetic recording layer on a nonmagnetic substrate, at least one layer in the intermediate layer contains Re as a main component element and contains, as a second main component element, an element having an hcp structure or an element having a bcc structure. The concentration of Re as the main component element of the intermediate layer is within the range from 55 to 99.5 atomic percent. The second component element is Co or Cr.

摘要翻译： 在非磁性基板上至少具有软磁性背层，底层，中间层和垂直磁记录层的垂直磁记录介质中，中间层中的至少一层含有Re作为主要成分元素， 作为第二主要元件元件，具有hcp结构的元件或具有bcc结构的元件。 作为中间层的主要成分的Re的浓度在55〜99.5原子％的范围内。 第二组分元素是Co或Cr。

公开(公告)号：US20100136370A1

公开(公告)日：2010-06-03

申请号：US12530423

申请日：2008-02-19

申请人： Ryuji Sakaguchi ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra K. Singh

发明人： Ryuji Sakaguchi ,  Gohei Kurokawa ,  Yuzo Sasaki ,  Tatsu Komatsuda ,  Amarendra K. Singh

IPC分类号： G11B5/33

CPC分类号： G11B5/7325 ,  Y10T428/11

摘要： The present invention provides a magnetic recording medium capable of reducing the diameter of particles of a perpendicular magnetic recording layer and obtaining a high perpendicular orientation to enable information to be recorded or reproduced at a high density, a method of manufacturing the same, and a magnetic recording/reproducing apparatus. A perpendicular magnetic recording medium includes a non-magnetic substrate; and at least a soft magnetic layer, an underlayer, an intermediate layer, and a perpendicular magnetic recording layer that are formed on the non-magnetic substrate in this order. The underlayer is a (111) crystal orientation layer having an fcc structure, and the intermediate layer includes a (110) crystal orientation layer having a bcc structure and a (002) crystal orientation layer having an hcp structure in this order. The (110) crystal orientation layer having the bcc structure includes 60 at % or more of Cr.

摘要翻译： 本发明提供一种磁记录介质，其能够减小垂直磁记录层的颗粒的直径并获得高垂直取向以使信息以高密度记录或再现，其制造方法和磁性 记录/再现装置。 垂直磁记录介质包括非磁性基片; 以及至少形成在非磁性基板上的软磁性层，底层，中间层和垂直磁记录层。 底层是具有fcc结构的（111）晶体取向层，中间层包括具有bcc结构的（110）晶体取向层和具有hcp结构的（002）晶体取向层。 具有bcc结构的（110）结晶取向层包含60原子％以上的Cr。

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：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：US08012613B2

公开(公告)日：2011-09-06

申请号：US12663350

申请日：2008-06-06

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： G11B5/66

CPC分类号： G11B5/732 ,  Y10T428/11

摘要： A magnetic recording medium is provided, which has at least one soft magnetic layer, at least one seed layer, at least one underlayer and at least one perpendicular magnetic recording layer, and is characterized in that the or each seed layer is comprised of a covalently bonded material. The covalently bonded material preferably predominantly comprises a nitride having a hexagonal crystal structure, more preferably, predominantly comprises aluminum nitride having a hexagonal wurtzite crystal structure. This magnetic recording medium is superior in recording and reproducing an information with high density.

摘要翻译： 提供了一种磁记录介质，其具有至少一个软磁层，至少一个种子层，至少一个底层和至少一个垂直磁记录层，其特征在于该或每个种子层由共价 粘合材料。 共价键合的材料优选主要包含具有六方晶系结构的氮化物，更优选主要包含具有六方纤锌矿晶体结构的氮化铝。 这种磁记录介质在高密度记录和再现信息方面是优越的。

公开(公告)号：US20100173175A1

公开(公告)日：2010-07-08

申请号：US12663350

申请日：2008-06-06

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： G11B5/33 ,  B05D5/12

CPC分类号： G11B5/732 ,  Y10T428/11

摘要： A magnetic recording medium is provided, which has at least one soft magnetic layer, at least one seed layer, at least one underlayer and at least one perpendicular magnetic recording layer, and is characterized in that the or each seed layer is comprised of a covalently bonded material. The covalently bonded material preferably predominantly comprises a nitride having a hexagonal crystal structure, more preferably, predominantly comprises aluminum nitride having a hexagonal wurtzite crystal structure. This magnetic recording medium is superior in recording and reproducing an information with high density.

摘要翻译： 提供了一种磁记录介质，其具有至少一个软磁层，至少一个种子层，至少一个底层和至少一个垂直磁记录层，其特征在于该或每个种子层由共价 粘合材料。 共价键合的材料优选主要包含具有六方晶系结构的氮化物，更优选主要包含具有六方纤锌矿晶体结构的氮化铝。 这种磁记录介质在高密度记录和再现信息方面是优越的。

公开(公告)号：US08968484B2

公开(公告)日：2015-03-03

申请号：US13210884

申请日：2011-08-16

申请人： Ryuji Sakaguchi ,  Ryo Tanaka ,  Norio Oshima

发明人： Ryuji Sakaguchi ,  Ryo Tanaka ,  Norio Oshima

IPC分类号： B08B1/02 ,  G11B5/84

CPC分类号： G11B5/8404

摘要： Provided is a method of manufacturing a magnetic recording mediums comprising employing a lifting and drying device for cleaning substrates by immersing one or more disk-like substrates with a central hole into a cleaning liquid disposed in a cleaning tank and lifting and drying the substrates, the lifting and drying device including: a hanger mechanism that is inserted through the central hole of the substrates and supports a plurality of the substrates while being hung thereon; an elevation mechanism that elevates the hanger mechanism between a position where the substrates are immersed into the cleaning liquid inside the cleaning tank and a position where the substrates are lifted from the cleaning tank; and an ejection mechanism that is disposed in the cleaning tank and ejects the cleaning liquid from the downside of the hanger mechanism toward the substrate.

摘要翻译： 提供了一种制造磁记录介质的方法，包括采用用于清洁基板的提升和干燥装置，将一个或多个具有中心孔的盘状基板浸入设置在清洗槽中的清洗液体中并提升和干燥基板， 提升和干燥装置，包括：吊架机构，其穿过基板的中心孔插入并支撑多个基板; 提升机构，其将所述基板浸入到所述清洗槽内的清洗液中的位置和所述基板从所述清洗槽提升的位置之间提升所述悬挂机构; 以及排出机构，其设置在所述清洗槽中，并且将所述清洗液从所述衣架机构的下侧朝向所述基板排出。

公开(公告)号：US20050121839A1

公开(公告)日：2005-06-09

申请号：US10953572

申请日：2004-09-30

申请人： Masato Fukushima ,  Ryuji Sakaguchi ,  Yukihisa Matsumura

发明人： Masato Fukushima ,  Ryuji Sakaguchi ,  Yukihisa Matsumura

IPC分类号： G11B5/73 ,  G11B5/82 ,  G11B5/84 ,  B28B1/14

CPC分类号： G11B5/7315 ,  G11B5/7325 ,  G11B5/82 ,  G11B5/8404 ,  Y10T428/12993

摘要： A process for producing a magnetic recording medium, which process comprises a texturing step for forming texture grooves having a line density of 7,500 lines/mm or more on the surface of a non-metallic substrate, and a step for forming an orientation-determining film, a non-magnetic undercoat layer, and a magnetic layer on the non-metallic substrate.

摘要翻译： 一种制造磁记录介质的方法，该方法包括在非金属基材的表面上形成线密度为7500线/ mm以上的纹理凹槽的纹理化步骤，以及用于形成取向决定膜的步骤 ，非磁性底涂层和非金属基材上的磁性层。

公开(公告)号：US06468602B2

公开(公告)日：2002-10-22

申请号：US09944178

申请日：2001-09-04

申请人： Ryuji Sakaguchi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kazunori Ohnami

发明人： Ryuji Sakaguchi ,  Hiroshi Sakai ,  Mikio Suzuki ,  Kazunori Ohnami

IPC分类号： H05H102

CPC分类号： G11B5/85 ,  C23C16/26 ,  G11B5/72 ,  G11B5/725 ,  G11B5/8408

摘要： The present invention provides a method for manufacturing a magnetic recording medium comprising the steps of forming a carbon protective film onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, using a reactant gas containing carbon atoms as a starting material, according to a plasma CVD method, wherein a mixed gas of hydrocarbon and hydrogen, in which the mixing ratio of hydrocarbon to hydrogen is in the range of 2 to 1˜1 to 100 by volume, is used as a reactant gas, during bias applying to said disc. In addition, the present invention provides a magnetic recording medium comprising a carbon protective film formed onto a disc, the non-magnetic substrate of which is layered with a non-magnetic base film and magnetic film, wherein said carbon protective film is formed according to a plasma CVD method, while applying bias.

摘要翻译： 本发明提供一种制造磁记录介质的方法，包括以下步骤：在非磁性基板上用非磁性基膜和磁性薄膜层叠形成碳保护膜，使用含有 碳原子作为起始原料，根据等离子体CVD法，其中烃与氢的混合比在烃与氢的混合比在2至1至1至100的范围内的混合气体用作 在施加到所述盘的偏压期间反应气体。 此外，本发明提供一种磁记录介质，其包含形成在盘上的碳保护膜，其非磁性基板与非磁性基膜和磁性膜层叠，其中所述碳保护膜根据 等离子体CVD法，同时施加偏压。