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1. 发明授权

US07183011B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US07183011B2
公开(公告)日：2007-02-27
申请号：US10346838
申请日：2003-01-17
申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
发明人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
IPC分类号： G11B5/64
CPC分类号： G11B5/732 , G11B5/7325
摘要： A magnetic recording medium for perpendicular magnetic recording system includes a nonmagnetic substrate and layers sequentially laminated on the substrate. The layers include a seed layer comprised of a metal or an alloy with a face centered cubic crystal structure, a nonmagnetic underlayer of a metal or an alloy with a hexagonal closest packed crystal structure, a magnetic layer having a granular structure including ferromagnetic crystalline grains with a hexagonal closest packed structure and nonmagnetic grain boundary region of mainly oxide surrounding the crystalline grains, a protective layer, and a liquid lubricant layer.
摘要翻译：用于垂直磁记录系统的磁记录介质包括非磁性衬底和顺序层压在衬底上的层。这些层包括由金属或具有面心立方晶体结构的合金构成的种子层，金属的非磁性底层或具有六方最接近的堆积晶体结构的合金，具有包含铁磁性晶粒的粒状结构的磁性层，主要包围晶粒的氧化物的六方最密堆积结构和非磁性晶界区域，保护层和液体润滑剂层。

2. 发明授权

US08039133B2 Magnetic recording medium and method for manufacturing the same 有权
标题翻译：磁记录介质及其制造方法
公开(公告)号：US08039133B2
公开(公告)日：2011-10-18
申请号：US11114578
申请日：2005-04-26
申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
发明人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
IPC分类号： G11B5/66
CPC分类号： G11B5/656 , G11B5/712 , G11B5/851 , Y10S428/90 , Y10T428/12465
摘要： A magnetic recording medium, and method of manufacturing the same, is provided with excellent recording performance by employing a granular magnetic layer having a specified composition. A magnetic recording medium according to the present invention comprises a nonmagnetic underlayer, a granular magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on a nonmagnetic substrate. The granular magnetic layer consists of ferromagnetic crystal grains containing cobalt and nonmagnetic grain boundary region surrounding the ferromagnetic crystal grains. The ferromagnetic crystal grains contain platinum in the range of 15 at % to 17 at %.
摘要翻译：磁记录介质及其制造方法通过采用具有特定组成的粒状磁性层而具有良好的记录性能。根据本发明的磁记录介质包括顺序层压在非磁性基底上的非磁性底层，粒状磁性层，保护膜和液体润滑层。颗粒状磁性层由铁磁性晶粒构成，包含铁磁性晶粒周围的钴和非磁性晶界。铁磁晶粒含有15原子％至17原子％的铂。

3. 发明授权

US07247395B2 Magnetic recording medium exhibiting low noise and high coercive force 有权
标题翻译：表现出低噪音，高矫顽力的磁记录介质
公开(公告)号：US07247395B2
公开(公告)日：2007-07-24
申请号：US10319842
申请日：2002-12-16
申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
发明人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/7325 , G11B5/65
摘要： A magnetic recording medium exhibiting low noise and having a sufficiently high coercive force includes a magnetic layer having a granular structure including ferromagnetic crystal grains with a hexagonal closed packed structure and a nonmagnetic grain boundary region of mainly an oxide intervening between the crystal grains. An underlayer has a body-centered cubic lattice structure. A nonmagnetic intermediate layer with the hexagonal closest packed structure includes Ru, Os, and/or Re, which are provided between the magnetic layer and the underlayer. A degree of mismatching Δ=|d1−d2|/d1 is at most 10%, for instance, in a range from 2.5% to 7.0%, where d1 is a spacing of lattice planes of the crystal grains in the magnetic layer and d2 is a spacing of the lattice planes of the crystal grains in the intermediate layer. A proportion of the crystal grains with a grain size of equal or greater than 8 nm are at most 10% of the crystal grains included in the intermediate layer and a standard deviation of the grain size is at most 1.4 nm. The layers are deposited without preheating the substrate.
摘要翻译：表现出低噪声并且具有足够高的矫顽力的磁记录介质包括具有包括具有六方密闭堆积结构的铁磁晶粒和主要是介于晶粒之间的氧化物的非磁性晶界区域的颗粒结构的磁性层。底层具有体心立方晶格结构。具有六方最密堆积结构的非磁性中间层包括设置在磁性层和底层之间的Ru，Os和/或Re。 Δ不一致的程度达到= 10％以下，例如在 2.5％至7.0％，其中d 1是磁性层中晶粒的晶格间距，d 2是晶体的晶格面间距中间层的晶粒。晶粒尺寸等于或大于8nm的晶粒的比例至多为包含在中间层中的晶粒的10％，并且晶粒尺寸的标准偏差为至多1.4nm。在不预热基底的情况下沉积这些层。

4. 发明申请

US20050196642A1 Magnetic recording medium and method for manufacturing the same 有权
公开(公告)号：US20050196642A1
公开(公告)日：2005-09-08
申请号：US11114578
申请日：2005-04-26
申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
发明人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
IPC分类号： C23C14/14 , C23C14/34 , G11B5/64 , G11B5/65 , G11B5/712 , G11B5/73 , G11B5/738 , G11B5/851 , H01F10/16 , H01F10/28 , B32B5/16
CPC分类号： G11B5/656 , G11B5/712 , G11B5/851 , Y10S428/90 , Y10T428/12465
摘要： A magnetic recording medium, and method of manufacturing the same, is provided with excellent recording performance by employing a granular magnetic layer having a specified composition. A magnetic recording medium according to the present invention comprises a nonmagnetic underlayer, a granular magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on a nonmagnetic substrate. The granular magnetic layer consists of ferromagnetic crystal grains containing cobalt and nonmagnetic grain boundary region surrounding the ferromagnetic crystal grains. The ferromagnetic crystal grains contain platinum in the range of 15 at % to 17 at %.

5. 发明授权

US06899964B2 Magnetic recording medium and method for manufacturing the same 有权
标题翻译：磁记录介质及其制造方法
公开(公告)号：US06899964B2
公开(公告)日：2005-05-31
申请号：US10317017
申请日：2002-12-11
申请人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
发明人： Miyabi Nakamura , Takahiro Shimizu , Hiroyuki Uwazumi , Naoki Takizawa , Tadaaki Oikawa
IPC分类号： C23C14/14 , C23C14/34 , G11B5/64 , G11B5/65 , G11B5/712 , G11B5/73 , G11B5/738 , G11B5/851 , H01F10/16 , H01F10/28 , G11B5/66 , G11B5/70 , H01J1/00
CPC分类号： G11B5/656 , G11B5/712 , G11B5/851 , Y10S428/90 , Y10T428/12465
摘要： A magnetic recording medium, and method of manufacturing the same, is provided with excellent recording performance by employing a granular magnetic layer having a specified composition. A magnetic recording medium according to the present invention comprises a nonmagnetic underlayer, a granular magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on a nonmagnetic substrate. The granular magnetic layer consists of ferromagnetic crystal grains containing cobalt and nonmagnetic grain boundary region surrounding the ferromagnetic crystal grains. The ferromagnetic crystal grains contain platinum in the range of 15 at % to 17 at %.
摘要翻译：磁记录介质及其制造方法通过采用具有特定组成的粒状磁性层而具有良好的记录性能。根据本发明的磁记录介质包括顺序层压在非磁性基底上的非磁性底层，粒状磁性层，保护膜和液体润滑层。颗粒状磁性层由铁磁性晶粒构成，包含铁磁性晶粒周围的钴和非磁性晶界。铁磁晶粒含有15原子％至17原子％的铂。

6. 发明申请

US20050000795A1 Magnetic recording medium and method of manufacturing the same 审中-公开
标题翻译：磁记录介质及其制造方法
公开(公告)号：US20050000795A1
公开(公告)日：2005-01-06
申请号：US10898981
申请日：2004-07-27
申请人： Naoki Takizawa , Takahiro Shimizu , Hiroyuki Uwazumi , Tadaaki Oikawa , Miyabi Nakamura
发明人： Naoki Takizawa , Takahiro Shimizu , Hiroyuki Uwazumi , Tadaaki Oikawa , Miyabi Nakamura
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/73 , G11B5/851 , C23C14/00 , B32B5/16 , C23C14/32
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/851
摘要： A magnetic recording medium exhibits a high coercive force and suppresses noises caused therefrom at a low level. The magnetic recording medium includes a nonmagnetic substrate, a nonmagnetic undercoating layer on the substrate where the undercoating layer has a hexagonal close packing structure or a combination of the hexagonal close packing structure and a body center cubic structure. The magnetic recording medium includes a nonmagnetic intermediate layer on the undercoating layer, where the intermediate layer has a hexagonal close packing structure or a combination of the hexagonal close packing structure and a body center cubic structure, and a magnetic layer on the intermediate layer. The magnetic layer has a granular structure formed of ferromagnetic crystal grains and oxide grain boundaries or nitride grain boundaries surrounding the ferromagnetic crystal grains.
摘要翻译：磁记录介质表现出高的矫顽力，并且抑制由此引起的噪声。磁记录介质包括非磁性基底，基底上的非磁性底涂层，其中底涂层具有六方密封结构或六方密封结构和体心立方结构的组合。磁记录介质包括在底涂层上的非磁性中间层，其中中间层具有六边形密堆积结构或六方密堆积结构和体心立方结构的组合，以及中间层上的磁性层。磁性层具有由铁磁性晶粒和包围铁磁性晶粒的氧化物晶界或氮化物晶界形成的粒状结构。

7. 发明申请

US20050008773A1 Method of manufacturing a magnetic recording medium 有权
标题翻译：制造磁记录介质的方法
公开(公告)号：US20050008773A1
公开(公告)日：2005-01-13
申请号：US10915565
申请日：2004-08-11
申请人： Akira Iso , Hiroyuki Uwazumi , Takahiro Shimizu , Naoki Takizawa , Miyabi Nakamura
发明人： Akira Iso , Hiroyuki Uwazumi , Takahiro Shimizu , Naoki Takizawa , Miyabi Nakamura
IPC分类号： G11B5/73 , G11B5/738 , G11B5/84 , G11B5/851 , B05D5/12
CPC分类号： G11B5/7325 , G11B5/8404
摘要： A method of manufacturing a magnetic recording medium facilitates preventing a film inflation from occurring in an environmental condition range between −40° C. and 80° C. and an 80% relative humidity. The magnetic recording medium includes a plastic substrate and an undercoating layer on the plastic substrate. The undercoating layer is provided with a columnar structure, which prevents water (moisture) between the plastic substrate and the undercoating layer from aggregating and, therefore, the film inflation from occurring.
摘要翻译：制造磁记录介质的方法有助于防止在-40℃至80℃和80％相对湿度之间的环境条件下发生膜膨胀。磁记录介质包括塑料基板和塑料基板上的底涂层。底涂层设置有柱状结构，其防止塑料基底和底涂层之间的水（水分）聚集，并且因此发生膜膨胀。

8. 发明授权

US07160571B2 Method of manufacturing a magnetic recording medium 有权
标题翻译：制造磁记录介质的方法
公开(公告)号：US07160571B2
公开(公告)日：2007-01-09
申请号：US10915565
申请日：2004-08-11
申请人： Akira Iso , Hiroyuki Uwazumi , Takahiro Shimizu , Naoki Takizawa , Miyabi Nakamura
发明人： Akira Iso , Hiroyuki Uwazumi , Takahiro Shimizu , Naoki Takizawa , Miyabi Nakamura
IPC分类号： B05D5/12
CPC分类号： G11B5/7325 , G11B5/8404
摘要： A method of manufacturing a magnetic recording medium facilitates preventing a film inflation from occurring in an environmental condition range between −40° C. and 80° C. and an 80% relative humidity. The magnetic recording medium includes a plastic substrate and an undercoating layer on the plastic substrate. The undercoating layer is provided with a columnar structure, which prevents water (moisture) between the plastic substrate and the undercoating layer from aggregating and, therefore, the film inflation from occurring.
摘要翻译：制造磁记录介质的方法有助于防止在-40℃至80℃和80％相对湿度之间的环境条件下发生膜膨胀。磁记录介质包括塑料基板和塑料基板上的底涂层。底涂层设置有柱状结构，其防止塑料基底和底涂层之间的水（水分）聚集，并且因此发生膜膨胀。

9. 再颁专利

USRE41282E1 Perpendicular magnetic recording medium and a method of manufacturing the same 有权
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：USRE41282E1
公开(公告)日：2010-04-27
申请号：US11945854
申请日：2007-11-27
申请人： Hiroyuki Uwazumi , Yasushi Sakai , Tadaaki Oikawa , Miyabi Nakamura
发明人： Hiroyuki Uwazumi , Yasushi Sakai , Tadaaki Oikawa , Miyabi Nakamura
IPC分类号： G11B5/71 , G11B5/66 , C23C20/00
CPC分类号： G11B5/732 , G11B5/7325 , G11B5/851
摘要： A perpendicular magnetic recording medium has a granular magnetic layer and a nonmagnetic underlayer of a metal or an alloy having a hexagonal close packed (hcp) crystal structure. A seed layer of a metal or an alloy of a face-centered cubic (fcc) crystal structure is provided under the nonmagnetic underlayer. Such a perpendicular magnetic recording medium exhibits excellent magnetic characteristics even when the thickness of the underlayer or the total thickness of the underlayer and the seed layer is very thin. Excellent magnetic characteristics can be obtained even when of the substrate is not preheated. Accordingly, a nonmagnetic substrate, such as a plastic resin can be employed to reduce the manufacturing cost.
摘要翻译：垂直磁记录介质具有颗粒磁性层和具有六方密堆积（hcp）晶体结构的金属或合金的非磁性底层。在非磁性底层下方设置面心立方（fcc）晶体结构的金属种子层或合金。即使当底层的厚度或底层和种子层的总厚度非常薄时，这种垂直磁记录介质也表现出优异的磁特性。即使在未预热基板的情况下也能获得良好的磁特性。因此，可以采用塑料树脂等非磁性基板来降低制造成本。

10. 发明授权

US06794028B2 Perpendicular magnetic recording medium and a method of manufacturing the same 有权
标题翻译：垂直磁记录介质及其制造方法
公开(公告)号：US06794028B2
公开(公告)日：2004-09-21
申请号：US10227621
申请日：2002-08-23
申请人： Hiroyuki Uwazumi , Yasushi Sakai , Tadaaki Oikawa , Miyabi Nakamura
发明人： Hiroyuki Uwazumi , Yasushi Sakai , Tadaaki Oikawa , Miyabi Nakamura
IPC分类号： G11B566
CPC分类号： G11B5/851 , G11B5/66 , Y10S428/90 , Y10T428/24975
摘要： A perpendicular magnetic recording medium has a granular magnetic layer and a nonmagnetic underlayer of a metal or an alloy having a hexagonal closest-packed (hcp) crystal structure. A seed layer of a metal or an alloy of a face-centered cubic (fcc) crystal structure is provided under the nonmagnetic underlayer. Such a perpendicular magnetic recording medium exhibits excellent magnetic characteristics even when the thickness of the underlayer or the total thickness of the underlayer and the seed layer is very thin. Excellent magnetic characteristics can be obtained even when of the substrate is not preheated. Accordingly, a nonmagnetic substrate, such as a plastic resin can be employed to reduce the manufacturing cost.
摘要翻译：垂直磁记录介质具有颗粒状磁性层和具有六方密堆积（hcp）晶体结构的金属或合金的非磁性底层。在非磁性底层下方设置面心立方（fcc）晶体结构的金属种子层或合金。即使当底层的厚度或底层和种子层的总厚度非常薄时，这种垂直磁记录介质也表现出优异的磁特性。即使在未预热基板的情况下也能获得良好的磁特性。因此，可以采用塑料树脂等非磁性基板来降低制造成本。

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