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1. 发明授权

US06468602B2 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：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。

2. 发明授权

US06255006B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06255006B1
公开(公告)日：2001-07-03
申请号：US09227916
申请日：1999-01-08
申请人： Kazunori Ohnami , Hiroshi Kanazawa , Hiroshi Sakai
发明人： Kazunori Ohnami , Hiroshi Kanazawa , Hiroshi Sakai
IPC分类号： G11B566
CPC分类号： G11B5/66 , Y10S428/90 , Y10S428/928 , Y10T428/12507 , Y10T428/12535 , Y10T428/12812 , Y10T428/12819 , Y10T428/12826 , Y10T428/12833 , Y10T428/1284 , Y10T428/12847 , Y10T428/12854 , Y10T428/12931
摘要： A magnetic recording medium comprising a non-magnetic substrate having thereon a non-magnetic undercoat, a magnetic film and optionally a protective film. The magnetic film comprises a material containing Co as a main component. The non-magnetic undercoat comprises at least two layers including a first undercoat film and a second undercoat film provided on the first undercoat film. The first undercoat film comprises a material containing Cr as a main component, and the second undercoat film comprises a material selected from the group consisting of a Cr/Nb-base alloy, a Cr/W-base alloy, a Cr/V-base alloy and a Cr/Mo-base alloy as a main component.
摘要翻译：一种磁记录介质，包括其上具有非磁性底涂层的非磁性基底，磁性膜和任选的保护膜。磁性膜包含含有Co作为主要成分的材料。非磁性底涂层包括至少两层，包括设置在第一底涂膜上的第一底涂膜和第二底涂膜。第一底涂膜包含以Cr为主要成分的材料，第二底涂层包含选自Cr / Nb基合金，Cr / W基合金，Cr / V碱合金和Cr / Mo基合金为主要成分。

3. 发明授权

US6090496A Magnetic recording medium and non-magnetic alloy film 失效
标题翻译：磁记录介质和非磁性合金膜
公开(公告)号：US6090496A
公开(公告)日：2000-07-18
申请号：US104345
申请日：1998-06-25
申请人： Hiroshi Kanazawa , Hiroshi Sakai , Kazunori Ohnami
发明人： Hiroshi Kanazawa , Hiroshi Sakai , Kazunori Ohnami
IPC分类号： G11B5/66 , H01F10/02
CPC分类号： G11B5/66 , Y10S428/90 , Y10S428/928 , Y10T428/12743 , Y10T428/12854 , Y10T428/12931 , Y10T428/12944 , Y10T428/265
摘要： A magnetic recording medium having sufficiently low noise and high coercive force suitable for use with a MR head. The magnetic recording medium comprises a non-magnetic substrate 1, a non-magnetic underlayer 2, a magnetic layer 3 and a protective layer 4. The magnetic layer comprises a Co alloy and the non-magnetic underlayer comprises a first underlayer 21 comprising an Al--Co--Ni alloy and a second underlayer 22 comprising Cr or a Cr alloy laminated on the first underlayer.
摘要翻译：具有足够低噪音和高矫顽力的磁记录介质，适用于MR磁头。磁记录介质包括非磁性基底1，非磁性底层2，磁性层3和保护层4.磁性层包括Co合金，非磁性底层包括第一底层21，其包括Al -Co-Ni合金和层叠在第一底层上的包含Cr或Cr合金的第二底层22。

4. 发明授权

US07087325B2 Magnetic recording medium and production process thereof 有权
标题翻译：磁记录介质及其制备方法
公开(公告)号：US07087325B2
公开(公告)日：2006-08-08
申请号：US10361827
申请日：2003-02-11
申请人： Hiroshi Kanazawa , Hiroshi Sakai , Hiroshi Ohsawa , Kazunori Ohnami
发明人： Hiroshi Kanazawa , Hiroshi Sakai , Hiroshi Ohsawa , Kazunori Ohnami
IPC分类号： B32B5/66 , B32B5/70
CPC分类号： G11B5/65 , C23C14/568 , G11B5/656 , G11B5/66 , G11B5/851
摘要： The present invention relates to a magnetic recording medium, which has excellent magnetic characteristics. The present invention also relates to a method for producing a magnetic recording medium where a plurality of targets are repeatedly sputtered several times in sequential order to form non-magnetic and magnetic films on a substrate.
摘要翻译：本发明涉及具有优异磁特性的磁记录介质。本发明还涉及一种磁记录介质的制造方法，其中多个靶被依次重复溅射多次，以在衬底上形成非磁性和磁性膜。

5. 发明授权

US06316062B1 Magnetic recording medium and method of producing the same 有权
标题翻译：磁记录介质及其制造方法
公开(公告)号：US06316062B1
公开(公告)日：2001-11-13
申请号：US09508836
申请日：2000-03-17
申请人： Ryuji Sakaguchi , Kazuo Kobayashi , Hiroshi Sakai , Mikio Suzuki , Kenichi Yoneyama , Kazunori Ohnami
发明人： Ryuji Sakaguchi , Kazuo Kobayashi , Hiroshi Sakai , Mikio Suzuki , Kenichi Yoneyama , 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。

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