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1. 发明授权

US07049013B2 Magnetic recording medium and method of producing the same, and magnetic storage apparatus 失效
公开(公告)号：US07049013B2
公开(公告)日：2006-05-23
申请号：US09772051
申请日：2001-01-29
申请人： Kazuhisa Shida , Atsushi Endo , Chiaki Okuyama , Akira Kikuchi
发明人： Kazuhisa Shida , Atsushi Endo , Chiaki Okuyama , Akira Kikuchi
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/12854
摘要： A magnetic recording medium is provided with a substrate, and a magnetic layer made of a CoCr-based alloy and having a multi-layer structure and disposed above the substrate. The multi-layer structure has a first magnetic layer disposed above the substrate and at least one second magnetic layer disposed on the first magnetic layer on an opposite side from the substrate. The first magnetic layer has a Cr-content larger than that of the second magnetic layer, and has a larger sum total content of nonmagnetic elements which are other than Cr and have a larger atomic radius than Co than the second magnetic layer.

2. 发明授权

US06830807B2 Thermally stable low noise magnetic recording media 失效
标题翻译：耐热稳定的低噪音磁记录介质
公开(公告)号：US06830807B2
公开(公告)日：2004-12-14
申请号：US10186207
申请日：2002-06-27
申请人： Chiaki Okuyama , Atsushi Endo , Akira Kikuchi , Takashi Gouke , Reiko Murao
发明人： Chiaki Okuyama , Atsushi Endo , Akira Kikuchi , Takashi Gouke , Reiko Murao
IPC分类号： G11B562
CPC分类号： G11B5/7325 , G11B5/656 , Y10T428/265
摘要： A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.
摘要翻译：一种热稳定并产生低介质噪声的磁记录介质。通过提供由饱和磁通密度控制在预定范围内的CoCr合金制成的多个中间层，磁记录介质同时实现高S / Nm和热稳定性。

3. 发明授权

US06682834B2 Magnetic storage medium having a high recording density 失效
标题翻译：具有高记录密度的磁存储介质
公开(公告)号：US06682834B2
公开(公告)日：2004-01-27
申请号：US09805415
申请日：2001-03-13
申请人： Chiaki Okuyama , Reiko Murao , Atsushi Endo , Akira Kikuchi
发明人： Chiaki Okuyama , Reiko Murao , Atsushi Endo , Akira Kikuchi
IPC分类号： G11B368
CPC分类号： G11B5/656 , G11B5/66
摘要： A magnetic storage medium includes a magnetic layer of a Co alloy of a system Co—Cr—Pt—B—Cu, wherein the magnetic layer has a thickness t and a remnant magnetic flux density Br satisfying a relationship (t×Br) 2.0 nT·m≦(t×Br)≦7.0 nT·m, wherein the Co alloy contains, in addition to Co, Cr with a concentration &bgr; of 20-26 at % (20 at %≦&bgr;≦26 at %), Pt with a concentration &ggr; of 6-20 at % (6 at %≦&ggr;≦20 at %), B with a concentration &dgr; of 1-7 at % (1 at %≦&dgr;≦7 at %), and Cu with a concentration &egr; of 2-7 at % (2 at %≦&egr;≦7 at %).
摘要翻译：磁存储介质包括Co-Cr-Pt-B-Cu体系的Co合金的磁性层，其中磁性层具有厚度t和满足关系式（txBr）2.0nT.m的剩余磁通密度Br。 <=（TXBr）<= 7.0nT.m，其中除了Co之外，Co合金还含有浓度为20-26at％（20at％<=β<= 26at％）的Cr，浓度δ为6-20at％（6at％<=γ<= 20at％），B浓度为1-7at％（1at％≤Δ7at％）和Cu 浓度ε为2-7at％（2at％<=ε= 7 AT％）。

4. 发明申请

US20050069734A1 Thermally stable low noise magnetic recording media 失效
标题翻译：耐热稳定的低噪音磁记录介质
公开(公告)号：US20050069734A1
公开(公告)日：2005-03-31
申请号：US10975282
申请日：2004-10-28
申请人： Chiaki Okuyama , Akira Kikuchi , Takashi Gouke
发明人： Chiaki Okuyama , Akira Kikuchi , Takashi Gouke
IPC分类号： G11B5/738 , G11B5/62 , G11B5/64 , G11B5/73 , B32B1/00
CPC分类号： G11B5/7325 , G11B5/656 , Y10T428/265
摘要： A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.
摘要翻译：一种热稳定并产生低介质噪声的磁记录介质。通过提供由饱和磁通密度控制在预定范围内的CoCr合金制成的多个中间层，磁记录介质同时实现高S / Nm和热稳定性。

5. 发明授权

US07368187B2 Thermally stable low noise magnetic recording media 失效
标题翻译：耐热稳定的低噪音磁记录介质
公开(公告)号：US07368187B2
公开(公告)日：2008-05-06
申请号：US10975282
申请日：2004-10-28
申请人： Chiaki Okuyama , Akira Kikuchi , Takashi Gouke
发明人： Chiaki Okuyama , Akira Kikuchi , Takashi Gouke
IPC分类号： G11B5/66
CPC分类号： G11B5/7325 , G11B5/656 , Y10T428/265
摘要： A magnetic recording medium which is thermally stable and produces low media noise. By providing a plurality of intermediate layers made of a CoCr alloy of which saturation magnetic flux densities are controlled within a predetermined range, the magnetic recording medium simultaneously realizes both a high S/Nm and thermal stability.
摘要翻译：一种热稳定并产生低介质噪声的磁记录介质。通过提供由饱和磁通密度控制在预定范围内的CoCr合金制成的多个中间层，磁记录介质同时实现高S / Nm和热稳定性。

6. 发明授权

US06753102B2 Magnetic recording medium and magnetic recording apparatus 失效
标题翻译：磁记录介质和磁记录装置
公开(公告)号：US06753102B2
公开(公告)日：2004-06-22
申请号：US10107724
申请日：2002-03-27
申请人： Reiko Murao , Chiaki Okuyama , Akira Kikuchi
发明人： Reiko Murao , Chiaki Okuyama , Akira Kikuchi
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/66
摘要： An object of this invention is to provide a magnetic recording medium in which its S/Nm (output/medium noise ratio) is improved. This magnetic recording medium is comprised of a first foundation layer made of alloy material composed of mainly Cr with added B, a second foundation layer made of alloy material in which Mo is mixed in Cr, an intermediate layer made of alloy material composed of mainly Co with added Cr and Ta, a lower magnetic layer and an upper magnetic layer made of alloy material composed of mainly Co with added Cr, Pt, B and a protective film composed of mainly C, these layers being formed in this order from the bottom.
摘要翻译：本发明的目的是提供一种其S / Nm（输出/中等噪声比）提高的磁记录介质。该磁记录介质包括由主要由Cr组成的合金材料制成的第一基础层B，由Cr中的Mo混合的合金材料制成的第二基础层，由主要由Co组成的合金材料制成的中间层添加Cr和Ta，下层磁性层和由主要由Co组成的合金材料制成的上部磁性层，添加Cr，Pt，B和主要由C组成的保护膜，这些层从底部开始依次形成。

7. 发明授权

US06686069B1 Magnetic recording medium with improved control layer 失效
标题翻译：具有改善控制层的磁记录介质
公开(公告)号：US06686069B1
公开(公告)日：2004-02-03
申请号：US09671053
申请日：2000-09-27
申请人： Chiaki Okuyama , Naoya Saitoh , Akira Kikuchi
发明人： Chiaki Okuyama , Naoya Saitoh , Akira Kikuchi
IPC分类号： G11B566
CPC分类号： G11B5/667 , G11B5/656 , G11B5/7325 , Y10S428/90
摘要： A magnetic recording medium includes a non-magnetic substrate, a first non-magnetic control layer disposed above the substrate, a soft magnetic layer disposed above the first control layer, and a second non-magnetic control layer disposed above the soft magnetic layer. A primary magnetic layer is disposed above the second control layer.
摘要翻译：磁记录介质包括非磁性基板，设置在基板上方的第一非磁性控制层，设置在第一控制层上方的软磁性层和设置在软磁性层上方的第二非磁性控制层。主磁性层设置在第二控制层的上方。

8. 发明授权

US06541104B2 Magnetic recording medium and a magnetic recording device 失效
标题翻译：磁记录介质和磁记录装置
公开(公告)号：US06541104B2
公开(公告)日：2003-04-01
申请号：US09801955
申请日：2001-03-08
申请人： Hideyuki Akimoto , Chiaki Okuyama , Iwao Okamoto
发明人： Hideyuki Akimoto , Chiaki Okuyama , Iwao Okamoto
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/24942 , Y10T428/24975 , Y10T428/265
摘要： A magnetic recording medium has a construction in which on a non-magnetic support member are successively stacked a seed layer made of a non-magnetic material that is mainly composed of Cr, a keeper layer made of an NiFe-type soft magnetic material, an intermediate layer made of a non-magnetic material that is mainly composed of Cr and a recording layer made of a magnetic material that is mainly composed of Co.
摘要翻译：磁记录介质具有以下结构：在非磁性支撑构件上依次堆叠由主要由Cr构成的非磁性材料制成的种子层，由NiFe型软磁性材料制成的保持层，由主要由Cr组成的非磁性材料制成的中间层和由主要由Co组成的磁性材料制成的记录层

9. 发明授权

US06299946B1 Method of manufacturing a recording medium 失效
标题翻译：制造记录介质的方法
公开(公告)号：US06299946B1
公开(公告)日：2001-10-09
申请号：US09520284
申请日：2000-03-06
申请人： Takashi Toyoguchi , Chiaki Okuyama
发明人： Takashi Toyoguchi , Chiaki Okuyama
IPC分类号： C08J704
CPC分类号： G11B5/8408 , G11B5/725
摘要： A method of manufacturing a recording medium includes the steps of: a) providing an underlayer on a substrate; b) providing a magnetic layer on the under layer; c) providing a protection layer of amorphous carbon on the magnetic layer; and d) providing a lubrication layer of fluorine on the protection layer, the lubrication layer including a bonding layer part which is strongly bonded to the protection layer and a mobile layer part which is not strongly bonded to the protection layer. The method further includes the steps of: e) implementing a UV curing process on the surface of the protection layer between the step c) and d), so that a ratio of the bonding layer part in the lubrication layer is increased.
摘要翻译：制造记录介质的方法包括以下步骤：a）在基底上提供底层; b）在下层上提供磁性层; c）在磁性层上提供无定形碳的保护层; 以及d）在所述保护层上设置氟的润滑层，所述润滑层包括与所述保护层牢固地接合的接合层部分和不牢固地结合到所述保护层的可移动层部分。该方法还包括以下步骤：e）在步骤c）和d）之间在保护层的表面上实施UV固化过程，使得润滑层中的结合层部分的比例增加。

10. 发明授权

US06071607A Magnetic recording medium and magnetic disk device 失效
标题翻译：磁记录介质和磁盘装置
公开(公告)号：US06071607A
公开(公告)日：2000-06-06
申请号：US797685
申请日：1997-01-31
申请人： Chiaki Okuyama , Kenji Sato , Iwao Okamoto , Masayoshi Shinohara
发明人： Chiaki Okuyama , Kenji Sato , Iwao Okamoto , Masayoshi Shinohara
IPC分类号： C22C19/07 , G11B5/02 , G11B5/39 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/73 , G11B5/738 , G11B5/85 , G11B5/851 , H01F10/16
CPC分类号： G11B5/7325 , G11B5/64 , G11B5/656 , G11B5/66 , Y10S428/90 , Y10T428/265
摘要： A magnetic recording medium comprising a nonmagnetic substrate and a magnetic recording film of a magnetic metal material deposited through a primer layer of a nonmagnetic metal material on the substrate, wherein the primer layer is formed of a metallic material composed mainly of chromium or chromium and molybdenum and the magnetic recording film is formed of a metallic material composed mainly of at least one member selected from the group consisting of cobalt, chromium, tantalum, and platinum. The magnetic recording medium enables high-density recording by taking advantage of high coercive force and, at the same time, can reduce the noise level and improve the S/N ratio.
摘要翻译：一种磁记录介质，包括非磁性基底和磁性金属材料的磁记录膜，所述磁性金属材料通过非磁性金属材料的底涂层沉积在基底上，其中底漆层由主要由铬或铬和钼组成的金属材料形成并且磁记录膜由主要由选自钴，铬，钽和铂中的至少一种构成的金属材料形成。磁记录介质可以通过利用高矫顽力实现高密度记录，并且同时可以降低噪声水平并提高S / N比。

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