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1. 发明授权

US06251532B1 Magnetic recording medium and magnetic storage device using the same 失效
标题翻译：磁记录介质及使用其的磁存储装置
公开(公告)号：US06251532B1
公开(公告)日：2001-06-26
申请号：US08555415
申请日：1995-11-09
申请人： Masaaki Futamoto , Nobuyuki Inaba , Tomoo Yamamoto , Masukazu Igarashi , Yuzuru Hosoe , Akira Ishikawa
发明人： Masaaki Futamoto , Nobuyuki Inaba , Tomoo Yamamoto , Masukazu Igarashi , Yuzuru Hosoe , Akira Ishikawa
IPC分类号： B32B1501
CPC分类号： G11B5/656 , C22C27/06 , G11B5/64 , G11B5/66 , Y10S428/90
摘要： A magnetic recording medium capable of reducing noise and an error rate of the medium comprises a nonmagnetic substrate; a magnetic layer formed on the surface of the nonmagnetic substrate directly or through a nonmagnetic underlayer; and a protective layer formed on the magnetic layer. The magnetic recording medium satisfies the following relationships: −0.5≦{Hc(1)−Hc(p)}/Hc(1)≦0.3 Hc(1)≧2 kOe 20 G×&mgr;m≦Br(1)×t≦100 G×&mgr;m where Hc(1) is a corecivity of the magnetic layer measured in the longitudinal direction; Hc(p) is a coercivity of the magnetic layer measured in the perpendicular direction; Br(1) is a remanent magnetization of the magnetic layer measured in the longitudinal direction; and “t” is a layer thickness of the magnetic layer.
摘要翻译：能够降低介质的噪声和误差率的磁记录介质包括非磁性衬底; 直接或通过非磁性底层形成在非磁性基片的表面上的磁性层; 以及形成在磁性层上的保护层。磁记录介质满足以下关系：-0.5 <= {Hc（1）-Hc（p）} / Hc（1）<= 0.3Hc（1）> = 2 kOe20 Gxmum <= Br（1）xt < 100 Gxmum其中Hc（1）是沿纵向测量的磁性层的集中度; Hc（p）是在垂直方向上测量的磁性层的矫顽力; Br（1）是沿纵向测量的磁性层的剩磁; “t”为磁性层的层厚。

2. 发明授权

US06544672B1 Magnetic recording medium and magnetic storage 失效
标题翻译：磁记录介质和磁存储
公开(公告)号：US06544672B1
公开(公告)日：2003-04-08
申请号：US09678382
申请日：2000-10-03
申请人： Masaaki Futamoto , Nobuyuki Inaba , Tomoo Yamamoto , Masukazu Igarashi , Yuzuru Hosoe , Akira Ishikawa
发明人： Masaaki Futamoto , Nobuyuki Inaba , Tomoo Yamamoto , Masukazu Igarashi , Yuzuru Hosoe , Akira Ishikawa
IPC分类号： G11B566
CPC分类号： G11B5/656 , C22C27/06 , G11B5/64 , G11B5/66 , Y10S428/90
摘要： Disclosed is a magnetic recording medium capable of reducing noise and an error rate of the medium. The medium comprises a nonmagnetic substrate; a magnetic layer formed on the surface of the nonmagnetic substrate directly or through a nonmagnetic underlayer; and a protective layer formed on the magnetic layer; wherein the magnetic recording medium satisfies the following relationships: −0.5≦{Hc(1)−Hc(p)}/Hc(1)≦0.3 Hc(1)≧2 kOe 20 G×&mgr;m≦Br(1)×t≦100 G×&mgr;m where Hc(1) indicates a corecivity of the magnetic layer measured in the longitudinal direction; Hc(p) indicates a coercivity of the magnetic layer measured in the perpendicular direction; Br(1) indicates a remanent magnetization of the magnetic layer measured in the longitudinal direction; and “t” indicates a layer thickness of the magnetic layer.
摘要翻译：公开了能够降低介质的噪声和错误率的磁记录介质。介质包括非磁性基底; 直接或通过非磁性底层形成在非磁性基片的表面上的磁性层; 以及形成在所述磁性层上的保护层; 其中所述磁记录介质满足以下关系：其中Hc（1）表示在纵向方向上测量的磁性层的堆积率; Hc（p）表示在垂直方向测量的磁性层的矫顽力; Br（1）表示在纵向测定的磁性层的残留磁化强度; “t”表示磁性层的层厚度。

3. 发明授权

US06177208B1 Magnetic recording system and magnetic recording medium used therefor 失效
标题翻译：磁记录系统和磁记录介质
公开(公告)号：US06177208B1
公开(公告)日：2001-01-23
申请号：US09317852
申请日：1999-05-25
申请人： Tomoo Yamamoto , Nobuyuki Inaba , Masukazu Igarashi , Masaaki Futamoto , Yuzuru Hosoe , Ichiro Tamai , Emi Mangyo , Kazusuke Yamanaka
发明人： Tomoo Yamamoto , Nobuyuki Inaba , Masukazu Igarashi , Masaaki Futamoto , Yuzuru Hosoe , Ichiro Tamai , Emi Mangyo , Kazusuke Yamanaka
IPC分类号： G11B566
CPC分类号： B82Y10/00 , G11B5/00 , G11B5/012 , G11B5/3903 , G11B5/656 , G11B5/82 , G11B2005/3996 , Y10S428/90
摘要： A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in reliability can be realized by making the magnetic layer of the magnetic recording medium from a mixture comprising at least one non-magnetic compound selected from the group consisting of oxides and nitrides and a magnetic material comprising Co and Pt as main components and specifying the molar ratio of Pt to Co in the magnetic layer, and employing a magnetoresistive read back magnetic recording head.
摘要翻译：可以实现高S / N的磁记录系统和低误码率，能够执行至少1吉比特/ 1平方英寸的高记录密度的写入和读取以及可靠性高的磁记录系统。来自包含选自氧化物和氮化物的至少一种非磁性化合物和包含Co和Pt作为主要成分的磁性材料并指定磁性层中Pt与Co的摩尔比的混合物的磁记录介质，并且使用磁阻回读磁记录头。

4. 发明授权

US5919581A Magnetic recording system and magnetic recording medium used therefor 失效
标题翻译：磁记录系统和磁记录介质
公开(公告)号：US5919581A
公开(公告)日：1999-07-06
申请号：US670121
申请日：1996-06-25
申请人： Tomoo Yamamoto , Nobuyuki Inaba , Masukazu Igarashi , Masaaki Futamoto , Yuzuru Hosoe , Ichiro Tamai , Emi Mangyo , Kazusuke Yamanaka
发明人： Tomoo Yamamoto , Nobuyuki Inaba , Masukazu Igarashi , Masaaki Futamoto , Yuzuru Hosoe , Ichiro Tamai , Emi Mangyo , Kazusuke Yamanaka
IPC分类号： G11B5/66 , G11B5/00 , G11B5/012 , G11B5/39 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/82 , G11B20/14 , G11B5/68 , G11B5/706
CPC分类号： B82Y10/00 , G11B5/00 , G11B5/3903 , G11B5/656 , G11B2005/3996 , G11B5/012 , G11B5/82 , Y10S428/90
摘要： A magnetic recording system high in S/N and low in bit error rate, capable of carrying out writing and reading of high recording density of at least 1 gigabit per 1 square inch and high in reliability can be realized by making the magnetic layer of the magnetic recording medium from a mixture comprising at least one non-magnetic compound selected from the group consisting of oxides and nitrides and a magnetic material comprising Co and Pt as main components and specifying the molar ratio of Pt to Co in the magnetic layer, and employing a magnetoresistive read back magnetic recording head.
摘要翻译：可以实现高S / N的磁记录系统和低误码率，能够执行至少1吉比特/ 1平方英寸的高记录密度的写入和读取以及可靠性高的磁记录系统。来自包含选自氧化物和氮化物的至少一种非磁性化合物和包含Co和Pt作为主要成分的磁性材料并指定磁性层中Pt与Co的摩尔比的混合物的磁记录介质，并且使用磁阻回读磁记录头。

5. 发明授权

US5759681A Magnetic recording medium and magnetic recording system using the same 失效
标题翻译：磁记录介质和使用磁记录系统的磁记录系统
公开(公告)号：US5759681A
公开(公告)日：1998-06-02
申请号：US595303
申请日：1996-02-01
申请人： Yuzuru Hosoe , Kazuetsu Yoshida , Nobuyuki Inaba , Tomoo Yamamoto , Akira Ishikawa , Masaaki Futamoto , Hiroyuki Kataoka , Yoshihiro Shiroishi
发明人： Yuzuru Hosoe , Kazuetsu Yoshida , Nobuyuki Inaba , Tomoo Yamamoto , Akira Ishikawa , Masaaki Futamoto , Hiroyuki Kataoka , Yoshihiro Shiroishi
IPC分类号： G11B5/127 , G11B5/39 , G11B5/66
CPC分类号： G11B5/1278 , G11B5/3967 , G11B5/66 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magnetic recording system includes an intermediate layer arranged between adjacent ones of a plurality of magnetic layers constituting a magnetic recording medium, the magnetic recording medium driven by a drive section in the recording direction, and a magnetic head including a write section and a read-back section set in relative motion with respect to the magnetic recording medium. Signals are applied to the magnetic head and the output signals from the magnetic head are read back by a read/write signal processing device. The read-back section of the magnetic head includes a magnetoresistive magnetic head. The magnetic layers of the magnetic recording medium include crystal grains having different crystal orientations and existing in overlapped positions in the direction perpendicular to the medium surface. High-density information read/write operation thus is made possible with an improved reliability.
摘要翻译：磁记录系统包括布置在构成磁记录介质的多个磁性层的相邻磁记录层之间的中间层，由记录方向上的驱动部分驱动的磁记录介质，以及包括写入区和读出区的磁头，相对于磁记录介质相对运动地设置。信号被施加到磁头，并且来自磁头的输出信号由读/写信号处理装置读回。磁头的回读部分包括磁阻磁头。磁记录介质的磁性层包括具有不同晶体取向并且在与介质表面垂直的方向上重叠位置的晶粒。因此，高密度信息读/写操作可以提高可靠性。

6. 发明申请

US20050123806A1 Magnetic recording medium and magnetic recording and reproducing apparatus 有权
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US20050123806A1
公开(公告)日：2005-06-09
申请号：US11036064
申请日：2005-01-18
申请人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
发明人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
IPC分类号： G11B5/66 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/73
CPC分类号： G11B5/64 , Y10T428/12465 , Y10T428/12986 , Y10T428/265 , Y10T428/31
摘要： A magnetic recording medium having a substrate, an under-layer formed on the substrate, a magnetic layer formed on the substrate and a protective layer formed on the magnetic layer. The magnetic layer comprises Co, Cr and Pt with a thickness being from 10 nm to 22 nm. Further, a coercivity of the magnetic layer is not less than 2000 Oe, and a fluctuation field of magnetic viscosity at a field strength equal to remanence coercivity or coercivity is not less than 30 Oe.
摘要翻译：具有基板的磁记录介质，在基板上形成的下层，形成在基板上的磁性层和形成在磁性层上的保护层。磁性层包括厚度为10nm至22nm的Co，Cr和Pt。此外，磁性层的矫顽力不小于2000Oe，磁场强度等于剩磁矫顽力或矫顽磁力的磁场粘度的波动范围不小于30Oe。

7. 发明授权

US06613428B2 Magnetic recording medium and magnetic recording and reproducing apparatus wherein the magnetic layer has a fluctuation of field; A or Hf of not less than 30 Oersteds 失效
标题翻译：磁记录介质和磁记录和再现装置，其中磁层具有磁场的波动; A或Hf不小于30奥斯特
公开(公告)号：US06613428B2
公开(公告)日：2003-09-02
申请号：US09849404
申请日：2001-05-07
申请人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
发明人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
IPC分类号： G11B564
CPC分类号： G11B5/64 , Y10T428/12465 , Y10T428/12986 , Y10T428/265 , Y10T428/31
摘要： A thin film magnetic recording medium including a magnetic layer having a fluctuation field defined as S/Xirr, where S is magnetic viscosity and Xirr is irreversible susceptibility Xirr. The fluctuation field of the magnetic layer is not less than 15 oersteds.
摘要翻译：一种薄膜磁记录介质，包括具有定义为S / Xirr的波动场的磁性层，其中S是磁粘度和Xirr是不可逆的磁化率Xirr。磁性层的波动场不小于15奥斯特。

8. 发明授权

US06310748B1 Magnetic thin film magnetic recording medium 失效
标题翻译：磁性薄膜磁记录介质
公开(公告)号：US06310748B1
公开(公告)日：2001-10-30
申请号：US08521363
申请日：1995-08-31
申请人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
发明人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
IPC分类号： G11B566
CPC分类号： G11B5/64 , Y10T428/12465 , Y10T428/12986 , Y10T428/265 , Y10T428/31
摘要： A ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.
摘要翻译：铁磁薄膜用于提供噪声低且S / N高的磁记录介质。作为磁记录介质的磁性膜的铁磁性薄膜使得在等于剩磁矫顽力或矫顽力的场强下，25℃下磁力粘度的波动范围不小于15奥斯特，矫顽力不小于 2000奥斯特。

9. 发明授权

US06846577B2 Magnetic recording medium possessing a fluctuation field of not less than 30 Oe 失效
标题翻译：磁记录介质具有不小于30 Oe的波动场
公开(公告)号：US06846577B2
公开(公告)日：2005-01-25
申请号：US10386456
申请日：2003-03-13
申请人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
发明人： Kazusuke Yamanaka , Tomoo Yamamoto , Yuzuru Hosoe , Nobuyuki Inaba , Yasutaro Uesaka , Masaaki Futamoto , Yoshibumi Matsuda , Kenji Furusawa , Shinji Narishige
IPC分类号： G11B5/66 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/73
CPC分类号： G11B5/64 , Y10T428/12465 , Y10T428/12986 , Y10T428/265 , Y10T428/31
摘要： An ferromagnetic thin film is used to provide a magnetic recording medium whose noise is low and whose S/N value is high. The ferromagnetic thin film as the magnetic film of the magnetic recording medium is such that the fluctuation field of magnetic viscosity at 25° C. at the field strength equal to remanence coercivity or coercivity is not less than 15 oersteds and the coercivity is not less than 2000 oersteds.
摘要翻译：铁磁性薄膜用于提供噪声低且S / N值高的磁记录介质。作为磁记录介质的磁性膜的铁磁性薄膜使得在等于剩磁矫顽力或矫顽力的场强下，25℃下磁力粘度的波动范围不小于15奥斯特，矫顽力不小于 2000奥斯特。

10. 发明授权

US5650889A Magnetic recording medium containing heavy rare gas atoms, and a magnetic transducing system using the medium 失效
标题翻译：含有重稀土气原子的磁记录介质，以及使用介质的磁转换系统
公开(公告)号：US5650889A
公开(公告)日：1997-07-22
申请号：US380792
申请日：1995-01-30
申请人： Tomoo Yamamoto , Yuzuru Hosoe , Emi Mangyo , Masaaki Futamoto , Nobuyuki Inaba
发明人： Tomoo Yamamoto , Yuzuru Hosoe , Emi Mangyo , Masaaki Futamoto , Nobuyuki Inaba
IPC分类号： G11B5/012 , G11B5/64 , G11B5/82
CPC分类号： G11B5/656 , G11B5/012
摘要： A magnetic recording medium having a high coercivity and a high S/N ratio for high-density operation can include either a conductive or a nonconductive substrate. If the substrate is nonconductive, a conducting precoat layer is formed over the substrate. Further, an underlayer may be provided, over which a magnetic layer is formed by a bias sputtering method. The bias sputtering method may use Kr, Xe or Rn as a sputter gas, and employs a negative bias voltage. The magnetic recording medium has a product of remanent magnetization and magnetic layer thickness of 10-150 G.multidot..mu.m and a coercivity of 1600-4000 Oe. In combination with this magnetic recording medium, a large-capacity magnetic recording system has a write head that uses a magnetic material having a saturation magnetic flux density of more than 1.2 T in at least a part of the magnetic core; a read head utilizing the giant magnetoresistance effect; a signal processing circuit that utilizes maximum likelihood decoding; and circuits that correct for asymmetry of the reproduced signals from the magnetoresistive head. In addition, the flying height of the magnetic head slider is set to less than 0.05 .mu.m.
摘要翻译：具有高矫顽力和高S / N比的用于高密度操作的磁记录介质可以包括导电或非导电衬底。如果衬底不导电，则在衬底上形成导电预涂层。此外，可以设置底层，通过偏置溅射法在其上形成磁性层。偏置溅射法可以使用Kr，Xe或Rn作为溅射气体，并采用负偏置电压。磁记录介质具有10-150Gxμm的剩余磁化和磁性层厚度的产物，矫顽力为1600-4000Oe。与该磁记录介质相结合，大容量磁记录系统具有在至少一部分磁芯中使用饱和磁通密度大于1.2T的磁性材料的写头; 利用巨磁电阻效应的读头; 利用最大似然解码的信号处理电路; 以及校正来自磁阻头的再现信号的不对称性的电路。此外，磁头滑块的飞行高度设定为小于0.05μm。

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