公开(公告)号：US5605733A

公开(公告)日：1997-02-25

申请号：US7969

申请日：1993-01-22

申请人： Akira Ishikawa ,  Sadao Hishiyama ,  Tomoo Yamamoto ,  Yoshihiro Shiroishi ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yukio Kato

发明人： Akira Ishikawa ,  Sadao Hishiyama ,  Tomoo Yamamoto ,  Yoshihiro Shiroishi ,  Tomoyuki Ohno ,  Yotsuo Yahisa ,  Yukio Kato

IPC分类号： G11B5/64 ,  G11B5/73 ,  G11B5/84 ,  G11B5/66

CPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/656 ,  G11B5/7325 ,  G11B5/8404 ,  Y10T428/24355 ,  Y10T428/265

摘要： A thin-film magnetic recording medium improves the magnetostatic and dynamic magnetic characteristics of the conventional magnetic recording media. In one embodiment, the substrate surface is textured in both the circumferential and radial directions. In further embodiments, a variety of underlayers (13) and crystal orientation control layers (17) are provided in accordance with specific parameters to control the crystal structure of the magnetic layer (14). Finally, an embodiment includes multiple magnetic layers (14, 19) having respectively different residual magnetic flux densities and thicknesses, but similar dot products of residual magnetic flux density and thickness.

摘要翻译： 薄膜磁记录介质改善了常规磁记录介质的静磁和动态磁特性。 在一个实施例中，衬底表面在周向和径向方向上均纹理化。 在另外的实施例中，根据具体参数提供各种底层（13）和晶体取向控制层（17）以控制磁性层（14）的晶体结构。 最后，一个实施例包括分别具有不同剩余磁通密度和厚度的多个磁性层（14,19），但是剩余磁通密度和厚度的类似点积。

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.

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

IPC分类号： G11B5/64 ,  G11B5/73 ,  H01F1/00

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。

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

IPC分类号： G11B5/64 ,  G11B5/73

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：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

IPC分类号： G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/72 ,  G11B5/73

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。

公开(公告)号：US5815343A

公开(公告)日：1998-09-29

申请号：US967346

申请日：1997-10-27

申请人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

发明人： Akira Ishikawa ,  Yoshihiro Shiroishi ,  Yuzuru Hosoe ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Masukazu Igarashi ,  Akira Osaki ,  Yoshiki Kato ,  Jun Fumioka

IPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/62 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/78 ,  G11B5/82 ,  G11B17/00

CPC分类号： G11B5/012 ,  G11B5/39 ,  G11B5/64 ,  G11B5/656 ,  G11B5/66 ,  G11B5/7315 ,  G11B5/7325 ,  G11B5/8404

摘要： A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.

摘要翻译： 磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。 在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。 或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

公开(公告)号：US6057021A

公开(公告)日：2000-05-02

申请号：US944472

申请日：1997-10-06

申请人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

发明人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84 ,  G11B5/60

CPC分类号： G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： In a magnetic recording medium having a non-magnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

摘要翻译： 在具有非磁盘基板和形成在非磁盘基板的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙度Ra（r）为0.3nm〜3nm 矫顽力的取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。

公开(公告)号：US5750230A

公开(公告)日：1998-05-12

申请号：US155515

申请日：1993-11-22

申请人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

发明人： Akira Ishikawa ,  Yuzuru Hosoe ,  Yoshihiro Shiroishi ,  Masatoshi Takeshita ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Akira Osaki ,  Kiwamu Tanahashi ,  Jun Fumioka ,  Yoshiki Kato ,  Masaki Ohura ,  Yukio Katoh

IPC分类号： G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/84

CPC分类号： G11B5/7325 ,  G11B5/64 ,  G11B5/66 ,  G11B5/8404 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/265

摘要： In a magnetic recording medium having a nonmagnetic disk substrate and a magnetic film formed on the surface of the non-magnetic disk substrate, a surface average roughness factor Ra(r) on the surface of the medium being from 0.3 nm to 3 nm, an orientation ratio of coercivity being from 0.1 to 0.7, and an in-plane magnetic anisotropic energy being from 3.times.10.sup.4 J/m.sup.3 to 5.times.10.sup.5 J/m.sup.3. By using such a medium, it is possible to provide a magnetic recording apparatus in which the magnetic head is capable of flying in a low position and high-density recording is achieved.

摘要翻译： 在具有非磁性盘基片和形成在非磁盘基片的表面上的磁性膜的磁记录介质中，介质表面的表面平均粗糙系数Ra（r）为0.3nm至3nm， 矫顽力取向比为0.1〜0.7，面内磁各向异性能为3×104J / m3〜5×105J / m3。 通过使用这种介质，可以提供磁头能够在低位置飞行的磁记录装置，并且实现高密度记录。