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公开(公告)号：US4833020A
公开(公告)日：1989-05-23
申请号：US149678
申请日：1988-01-28
申请人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Yoshio Gobara , Norikazu Tsumita , Masaki Ohura , Masaaki Hayashi
发明人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Yoshio Gobara , Norikazu Tsumita , Masaki Ohura , Masaaki Hayashi
CPC分类号： G11B5/7325 , Y10S428/90 , Y10S428/928 , Y10T428/12465 , Y10T428/12986 , Y10T428/265
摘要： In a magnetic recording medium including an underlayer and a magnetic layer formed sequentially on a substrate, the underlayer is composed of a composite underlayer having an at least two-layered structure, the underlayer on the side of the substrate is made of a material providing low modulation to the magnetic recording medium while the underlayer on the side of the magnetic layer is made of a material providing a high S/N ratio to the medium. This makes it possible to obtain a magnetic recording medium having low modulation and high S/N ratio.
摘要翻译： 在包括在基板上顺序形成的底层和磁性层的磁记录介质中，底层由具有至少两层结构的复合底层构成，底层侧的底层由提供低的材料制成 调制到磁记录介质，而磁层的底层由介质提供高S / N比的材料制成。 这使得可以获得具有低调制和高S / N比的磁记录介质。
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公开(公告)号：US6010794A
公开(公告)日：2000-01-04
申请号：US852096
申请日：1997-05-06
申请人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
发明人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
摘要： A magnetic recording medium including a substrate and a magnetic layer on the substrate which is a Co-based alloy including Pt and/or Ir, including at least one of Ti, Zr, Hr, V, Nb, Ta, Cr, Mo, W, Ge, and Si, and including oxygen. A magnetic memory apparatus including the magnetic recording medium.
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公开(公告)号：US4883711A
公开(公告)日：1989-11-28
申请号：US133357
申请日：1987-12-15
申请人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Norikazu Tsumita , Yasushi Kitazaki , Masaki Ohura , Sadanori Nagaike
发明人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Norikazu Tsumita , Yasushi Kitazaki , Masaki Ohura , Sadanori Nagaike
CPC分类号： G11B5/7325 , G11B5/72 , Y10S428/90 , Y10T428/12465 , Y10T428/265
摘要： A magnetic recording medium in which a non-magnetic intermediate layer made of an alloy substantially composed of at least one element selected from the group consisting of Zr, Hf, Ta, Ti and Nb is disposed between a magnetic layer formed on a substrate and a non-magnetic overcoat layer formed on the magnetic layer. Since the impact shock resistance and the vibration resistance of the magnetic recording medium can be improved and the head-medium spacing of the magnetic disc apparatus can be decreased extremely by disposing the non-magnetic intermediate layer, it can provide a increase in the recording density, particularly, in a thin film type magnetic recording medium using a metallic magnetic thin film or metal oxide thin film as the magnetic layer. It can also improve the corrosion resistance in the case of a metallic magnetic thin film type medium.
摘要翻译： 一种磁记录介质，其中由在由Zr，Hf，Ta，Ti和Nb组成的组中选出的至少一种元素基本上构成的合金制成的非磁性中间层设置在形成在基板上的磁性层和 形成在磁性层上的非磁性外涂层。 由于可以通过设置非磁性中间层来提高磁记录介质的冲击冲击强度和抗振动性，并且能够极大地降低磁盘装置的头 - 介质间隔，因此可提高记录密度 特别是在使用金属磁性薄膜或金属氧化物薄膜作为磁性层的薄膜型磁记录介质中。 也可以在金属磁性薄膜型介质的情况下提高耐腐蚀性。
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4.发明授权公开(公告)号：US06627253B2
公开(公告)日：2003-09-30
申请号：US09897502
申请日：2001-07-03
申请人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
发明人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
IPC分类号： B32B3100
CPC分类号： G11B5/7325 , G11B5/656 , Y10T428/12465
摘要： A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ge and Si, except for Si, whose concentration is 1 to 40 at. and 0.1 to 10 at. of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained. A process for producing the magnetic recording medium for longitudinal medium and a magnetic memory apparatus using the magnetic recording medium for longitudinal recording are also disclosed.
摘要翻译： 公开了一种用于具有低介质噪声，高S / N比和高可靠性的耐腐蚀性的纵向记录用磁记录介质。 通过从包含1至35at。的Co基合金制备磁性层。 选自Pt和Ir中的至少一种元素的％，1至17at。 ％的选自Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W，Ge和Si中的至少一种元素，Si除外，其浓度为1〜40at。 和0.1〜10at。 的氧，用于纵向记录的磁记录介质具有1,200Oe以上的面内矫顽力和不大于0.85的矫顽正方形。 还公开了用于制造用于纵向介质的磁记录介质的方法和使用用于纵向记录的磁记录介质的磁存储装置。
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公开(公告)号：US06335103B1
公开(公告)日：2002-01-01
申请号：US08852096
申请日：1997-05-06
申请人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
发明人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
IPC分类号： H01F100
CPC分类号： G11B5/7325 , G11B5/656 , Y10S428/928 , Y10T428/12465 , Y10T428/12861
摘要： A magnetic recording medium including a substrate and a magnetic layer on the substrate which is a Co-based alloy including Pt and/or Ir, including at least one of Ti, Zr, Hr, V, Nb, Ta, Cr, Mo, W, Ge, and Si, and including oxygen. A magnetic memory apparatus including the magnetic recording medium.
摘要翻译： 1.一种磁记录介质，其特征在于，在所述基板上具有由Ti，Zr，Hr，V，Nb，Ta，Cr，Mo，W中的至少一种构成的包含Pt和/或Ir的Co基合金的基板和磁性层 ，Ge和Si，并且包括氧。 一种包括磁记录介质的磁存储装置。
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公开(公告)号：US5665478A
公开(公告)日：1997-09-09
申请号：US328400
申请日：1994-10-24
申请人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
发明人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
CPC分类号： G11B5/7325 , G11B5/656 , Y10S428/928 , Y10T428/12465 , Y10T428/12861
摘要： A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Ge and Si, except for Si, whose concentration is 1 to 40 at. %, and 0.1 to 10 at. % of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained.
摘要翻译： 公开了一种用于具有低介质噪声，高S / N比和高可靠性的耐腐蚀性的纵向记录用磁记录介质。 通过从包含1至35at。的Co基合金制备磁性层。 选自Pt和Ir中的至少一种元素的％，1至17at。 ％的选自Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W，Ge和Si中的至少一种元素，Si除外，其浓度为1〜40at。 ％，0.1〜10at。 获得氧的百分比，用于纵向记录的磁记录介质，其平面矫顽力为1200奥斯或更高，矫顽正方形不大于0.85。
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7.发明授权
公开(公告)号：US5143794A
公开(公告)日：1992-09-01
申请号：US391181
申请日：1989-08-08
申请人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
发明人： Hiroyuki Suzuki , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Yotsuo Yahisa , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Takaaki Shirakura , Noriyuki Shige , Kazumasa Takagi
CPC分类号： G11B5/7325 , G11B5/656 , Y10S428/928 , Y10T428/12465 , Y10T428/12861
摘要： A magnetic recording medium for longitudinal recording with a low media noise, a high S/N ratio and high reliabilities in corrosion resistance is disclosed. By making a magnetic layer from a Co-based alloy comprising 1 to 35 at. % of at least one element selected from the group consisting of Pt and Ir, 1 to 17 at. % of at least one element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W. Ge and Si, except for Si, whose concentration is 1 to 40 at. %, and 0.1 to 10 at. % of oxygen, a magnetic recording medium for longitudinal recording having an inplane coercivity of 1,200 Oe or more and a coercive squares of not more than 0.85 is obtained.A process for producing the magnetic recording medium for longitudinal medium and a magnetic memory apparatus using the magnetic recording medium for longitudinal recording are also disclosed.
摘要翻译： 公开了一种用于具有低介质噪声，高S / N比和高可靠性的耐腐蚀性的纵向记录用磁记录介质。 通过从包含1至35at。的Co基合金制备磁性层。 选自Pt和Ir中的至少一种元素的％，1至17at。 ％的选自Ti，Zr，Hf，V，Nb，Ta，Cr，Mo，W.Ge和Si中的至少一种元素，Si除外，其浓度为1至40at。 ％，0.1〜10at。 获得氧的百分比，用于纵向记录的磁记录介质，其平面矫顽力为1200奥斯或更高，矫顽正方形不大于0.85。 还公开了用于制造用于纵向介质的磁记录介质的方法和使用用于纵向记录的磁记录介质的磁存储装置。
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公开(公告)号：US5147732A
公开(公告)日：1992-09-15
申请号：US412988
申请日：1989-09-26
申请人： Yoshihiro Shiroishi , Takeo Yamashita , Sadao Hishiyama , Noriyuki Kumasaka , Yoshibumi Matsuda , Hiroyuki Suzuki , Kazumasa Takagi , Norikazu Tsumita , Masaki Ohura , Tomoyuki Ohno
发明人： Yoshihiro Shiroishi , Takeo Yamashita , Sadao Hishiyama , Noriyuki Kumasaka , Yoshibumi Matsuda , Hiroyuki Suzuki , Kazumasa Takagi , Norikazu Tsumita , Masaki Ohura , Tomoyuki Ohno
IPC分类号： G11B5/64 , G11B5/66 , G11B11/105
CPC分类号： G11B5/65 , G11B11/10593 , G11B5/66 , Y10S428/90 , Y10S428/928 , Y10T428/12861
摘要： Disclosed are longitudinal recording media comprising a composite magnetic film formed on a nonmagnetic substrate directly or through a nonmagnetic underlayer, in which all of magnetic thin films constituting the composite magnetic film are magnetically connected, the composite magnetic film has a single in-plane coercivity, and the in-plane coercivity is greater than the in-plane coercivity of a longitudinal magnetically anisotropic magnetic thin film constituting a magnetic thin film nearest to an information recording side among the magnetic thin films constituting the composite film.
摘要翻译： 本发明公开了一种纵向记录介质，其包括直接或通过非磁性底层形成在非磁性基底上的复合磁性膜，其中构成复合磁性膜的所有磁性薄膜磁性连接，复合磁性膜具有单一的面内矫顽力， 并且面内矫顽力大于构成复合膜的磁性薄膜中构成最靠近信息记录侧的磁性薄膜的纵向磁各向异性磁性薄膜的面内矫顽力。
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公开(公告)号：US4939045A
公开(公告)日：1990-07-03
申请号：US172194
申请日：1988-03-23
申请人： Kazuetsu Yoshida , Yoshihiro Shiroishi , Makoto Saito , Norikazu Tsumita , Takeo Yamashita , Hiroyuki Suzuki , Yasushi Kitazaki , Masaki Ohura , Sadao Hishiyama , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Katsuhiro Kuroda , Sadanori Nagaike
发明人： Kazuetsu Yoshida , Yoshihiro Shiroishi , Makoto Saito , Norikazu Tsumita , Takeo Yamashita , Hiroyuki Suzuki , Yasushi Kitazaki , Masaki Ohura , Sadao Hishiyama , Tomoyuki Ohno , Yoshibumi Matsuda , Kazumasa Takagi , Katsuhiro Kuroda , Sadanori Nagaike
CPC分类号： G01R33/1207 , G11B5/64 , Y10S428/928 , Y10T428/12833 , Y10T428/12861
摘要： Disclosed are a magnetic recording medium having a magnetic recording layer formed of a magnetic thin film in which rotational hysteresis integral R.sub.H is within a range of from 0.4 to 1.3 in the measurement by a torque magnetometer, and a continuous magnetic recording medium in which crystal grains are substantially randomly arranged on the upper surface of a magnetic recording layer or on the surface of a non-magnetic subbing layer, and in which each of the crystal grains is made to be in the form of an ellipsoid or needle and to have a length-ways axial ratio of a major axis to a minor axis not smaller than 2, more preferably, not smaller than 4.
摘要翻译： 公开了一种磁记录介质，其具有由磁性薄膜形成的磁记录层，其中旋转磁滞积分RH在通过转矩磁力计的测量中在0.4至1.3的范围内，以及连续磁记录介质，其中晶粒 基本上随机地布置在磁记录层的上表面上或非磁性底层的表面上，并且其中每个晶粒被制成椭圆形或针状，并且具有长度 长轴与短轴的轴向比不小于2，更优选不小于4。
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公开(公告)号：US5236791A
公开(公告)日：1993-08-17
申请号：US399775
申请日：1989-08-28
申请人： Yotsuo Yahisa , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Shinichiro Saitoh , Suzuki Hiroyuki , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Noriyuki Shige , Kazumasa Takagi
发明人： Yotsuo Yahisa , Yoshihiro Shiroishi , Sadao Hishiyama , Tomoyuki Ohno , Shinichiro Saitoh , Suzuki Hiroyuki , Yoshibumi Matsuda , Norikazu Tsumita , Masaki Ohura , Noriyuki Shige , Kazumasa Takagi
CPC分类号： G11B5/72 , Y10S428/90 , Y10T428/12465 , Y10T428/12542 , Y10T428/12576 , Y10T428/1259 , Y10T428/12611 , Y10T428/1266 , Y10T428/12674 , Y10T428/12806 , Y10T428/12854 , Y10T428/12875 , Y10T428/12931
摘要： A magnetic recording medium that uses, as a protective coating layer provided on a magnetic layer for magnetically recording signals, a layer made of a nonmagnetic material consisting of two ore more elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W, and one or more elements of N, C, O, and B, or made of a magnetic material consisting of one or more elements of Co, Fe, Ni, and Gd, one or more elements of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, and W, and one or more elements of N, C, O, B, and Si is excellent in sliding endurance. When the protective coating layer is made of the nonmagnetic material, the magnetic recording medium is also excellent in corrosion resistance, and when the protective coating layer is made of the magnetic material, the spacing between a magnetic head and the magnetic recording medium can advantageously be made large. Both the cases are high in reliability, and suitable for high density magnetic recording. The magnetic recording medium can be used in combination with a magnetic head that uses a metal magnetic alloy as at least part of the magnetic core to provide an excellent magnetic storage.
摘要翻译： 一种磁记录介质，其使用设置在用于磁记录信号的磁性层上的保护涂层，由由Ti，Zr，Hf，V，Nb，Ta，Cr两种以上的元素组成的非磁性材料制成的层， Mo和W以及一种或多种N，C，O和B的元素，或由Co，Fe，Ni和Gd的一种或多种元素组成的磁性材料制成，Ti，Zr的一种或多种元素 ，Hf，V，Nb，Ta，Cr，Mo和W，N，C，O，B和Si的一种或多种元素的滑动耐久性优异。 当保护涂层由非磁性材料制成时，磁记录介质也具有优异的耐腐蚀性，并且当保护涂层由磁性材料制成时，磁头和磁记录介质之间的间距可以有利地是 做大了 这两种情况都具有高可靠性，适用于高密度磁记录。 磁记录介质可以与使用金属磁性合金作为磁芯的至少一部分的磁头组合使用以提供优异的磁存储。
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