-
公开(公告)号：US4842917A
公开(公告)日：1989-06-27
申请号：US88380
申请日：1987-08-24
申请人： Tomoyuki Ohno , Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Takaaki Shirakura , Shinya Matsuoka , Makoto Sano , Takao Nakamura , Kazumasa Takagi , Tokuumi Fukazawa , Kenzo Susa
发明人： Tomoyuki Ohno , Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Takaaki Shirakura , Shinya Matsuoka , Makoto Sano , Takao Nakamura , Kazumasa Takagi , Tokuumi Fukazawa , Kenzo Susa
IPC分类号： G11B5/73
CPC分类号： G11B5/7325 , Y10S428/90 , Y10T428/24355
摘要： A magnetic recording medium having a magnetic film formed on a substrate directly or through an underlayer from an alloy containing Co as a principal component. The central line average surface roughness Ra and maximum surface roughness Rmax of the magnetic film in a direction perpendicular to the direction of magnetic recording are selected so as to fall within the ranges of 1 nm.ltoreq.Ra.ltoreq.20 nm and Rmax.ltoreq.25 Ra, respectively, and the in-plane magnetic anisotropy energy Ku of the magnetic film is selected to fall within the range of 0.ltoreq.Ku.ltoreq.8.times.10.sup.5 erg/cm.sup.3. Thus, it is possible to minimize the value of modulation which represents the degree of variation of read output on the same circumference of a magnetic disk. It is also possible to reduce the noise generated in read and write operations by forming the magnetic film so as have no crystallographic orientation.
摘要翻译： 一种磁记录介质，其具有直接或通过底层从基板上形成的含有Co作为主要成分的合金的磁性膜。 选择磁性膜在垂直于磁记录方向的方向上的中心线平均表面粗糙度Ra和最大表面粗糙度Rmax，使其落入1nm≤Ra<20nm的范围内，并且Rmax < / = 25Ra，磁性膜的面内磁各向异性能Ku被选择在0≤K≤5×10 5Ω/ cm 3的范围内。 因此，可以将表示在磁盘的同一圆周上的读取输出的变化程度的调制值最小化。 也可以通过形成磁性膜来减少读取和写入操作中产生的噪声，从而没有结晶取向。
-
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.
-
3.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。
-
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。
-
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。
-
6.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。
-
公开(公告)号：US4786553A
公开(公告)日：1988-11-22
申请号：US30600
申请日：1987-03-27
申请人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Norikazu Tsumita , Tsuneo Suganuma , Yoshio Gobara , Masaaki Hayashi , Makoto Sano , Takaaki Shirakura
发明人： Yoshihiro Shiroishi , Sadao Hishiyama , Hiroyuki Suzuki , Norikazu Tsumita , Tsuneo Suganuma , Yoshio Gobara , Masaaki Hayashi , Makoto Sano , Takaaki Shirakura
CPC分类号： G11B5/64 , Y10S428/90 , Y10T428/1266 , Y10T428/12854 , Y10T428/12944 , Y10T428/265
摘要： A magnetic recording medium comprises a non-magnetic substrate and a thin magnetic film, the thin magnetic film being composed mainly of Co, Ni and at least one of Zr and Hf, and a concentration of Zr, Hf or Zr and Hf as contained in the thin magnetic film being 0.1 to 30% by atom on the basis of the total of Co and Ni, and has a considerably higher corrosion resistance than that of the conventional magnetic recording medium having a thin Co-Ni magnetic film.
摘要翻译： 磁记录介质包括非磁性基片和薄磁膜，该薄磁膜主要由Co，Ni和Zr和Hf中的至少一种组成，Zr，Hf或Zr和Hf的浓度包含在 基于Co和Ni的总和，薄磁膜为0.1至30原子％，并且具有比具有薄Co-Ni磁性膜的常规磁记录介质更高的耐腐蚀性。
-
公开(公告)号：US5825591A
公开(公告)日：1998-10-20
申请号：US768958
申请日：1996-12-18
申请人： Takao Nakamura , Nobuya Sekiyama , Keiko Nakano , Kenji Furusawa , Hiroyuki Kataoka , Takaaki Shirakura , Shinya Matsuoka
发明人： Takao Nakamura , Nobuya Sekiyama , Keiko Nakano , Kenji Furusawa , Hiroyuki Kataoka , Takaaki Shirakura , Shinya Matsuoka
CPC分类号： G11B5/6005
摘要： The present invention relates to a magnetic disk unit of a high memory capacity wherein a magnetic head and a magnetic disk with a lubricant layer formed on the surface thereof are allowed to perform a relative motion in a mutually contacted state to write and read out information of a high recording density, and the invention is also concerned with the shape and material of the magnetic head suitable for a continual sliding motion of the head on the magnetic disk surface, as well as the lubricant layer formed on the disk surface. According to the present invention, the magnetic head, which has a slider surface of a predetermined curvature, is supported by an arm through a spring and is pushed onto the magnetic disk surface with the lubricant layer formed thereon, then with rotation of the magnetic disk, the lubricant layer liquefies and information is recorded or read out in a contacted state of the head and the disk. The distance between the magnetic head and the disk surface can be shortened to a great extent and the recording density of the magnetic disk can be increased remarkably, thereby permitting a larger capacity of the magnetic disk unit.
摘要翻译： 本发明涉及具有高存储容量的磁盘单元，其中磁头和在其表面上形成有润滑层的磁盘被允许在相互接触的状态下执行相对运动以写入和读出信息 高记录密度，并且本发明还涉及适用于磁头在磁盘表面上的连续滑动运动的磁头的形状和材料以及形成在磁盘表面上的润滑剂层。 根据本发明，具有预定曲率的滑块表面的磁头通过弹簧由臂支撑，并且在其上形成润滑剂层的同时被推到磁盘表面上，然后随着磁盘的旋转 润滑剂层液化并且在头部和盘的接触状态下记录或读出信息。 磁头和盘表面之间的距离可以被很大程度地缩短，从而可以显着地提高磁盘的记录密度，从而允许磁盘单元的容量更大。
-
公开(公告)号：US5744256A
公开(公告)日：1998-04-28
申请号：US945527
申请日：1992-09-16
CPC分类号： G11B5/66 , Y10S428/90 , Y10T428/1284 , Y10T428/12847 , Y10T428/12854 , Y10T428/12931
摘要： The present invention relates to a high-density magnetic recording medium (or "media" as it is sometimes called) for a recording/reproduction system (such as thosed used in computer disk drives) and, more particularly, to a magnetic recording medium having a plurality of magnetic recording layers such that the uppermost layer is comparatively thinner and more densely structured than the lower magnetic recording layers. The present magnetic recording medium comprises a non-magnetic plated substrate, a non-magnetic underlying layer laminated on the plated substrate, a plurality of magnetic alloy layers including the uppermost layer laminated onto the underlying layer, a non-magnetic covering layer laminated onto the uppermost layer, and a lubricating layer formed onto the non-magnetic covering layer. The present invention improves the corrosion resistance of an alloy-type magnetic recording medium while maintaining or exceeding the recording/reproducing characteristics of such media, all at a desirable cost of production.
摘要翻译： 本发明涉及用于记录/再现系统（诸如在计算机磁盘驱动器中使用的）的高密度磁记录介质（或有时称为“介质”），更具体地说，涉及一种具有 多个磁记录层，使得最上层比下磁记录层相对较薄和更致密地构造。 本磁记录介质包括非磁性电镀衬底，层压在电镀衬底上的非磁性底层，多层磁性合金层，包括层压在下层上的最上层，层叠在第一层上的非磁性覆盖层 最上层和形成在非磁性覆盖层上的润滑层。 本发明在保持或超过这种介质的记录/再现特性的同时，以合乎理想的生产成本提高合金型磁记录介质的耐腐蚀性。
-
公开(公告)号：US5158833A
公开(公告)日：1992-10-27
申请号：US484526
申请日：1990-02-26
CPC分类号： G11B5/656 , Y10S428/90 , Y10T428/12465 , Y10T428/12931 , Y10T428/30
摘要： A magnetic recording medium having high recording density and being capable of obtaining excellent over-write characteristics by having a magnetic layer including Co and Ni as its principal components on a non-magnetic substrate, the Ni content of the magnetic layer is greater at portions closer to the surface of the magnetic layer in the direction of its thickness; the Ni content at portions closer to the surface of the magnetic layer is 20.about.50 at %; and the portion closer to the surface of the magnetic layer has at least one element selected from the group consisting of Zr, Ti, Pt, Ru, Ta, Rh, V, Nb, Cr and Pd.
摘要翻译： 一种具有高记录密度并且能够通过在非磁性衬底上具有包括Co和Ni作为主要成分的磁性层而获得优异的叠加特性的磁记录介质，磁性层的Ni含量在接近部分时更大 在其厚度方向到磁性层的表面; 靠近磁性层表面的部分的Ni含量为20％; 并且更靠近磁性层表面的部分具有选自Zr，Ti，Pt，Ru，Ta，Rh，V，Nb，Cr和Pd中的至少一种元素。
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.041 秒)
