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1. 发明授权

US06365287B1 Magnetic recording media and magnetic storage device 有权
标题翻译：磁记录介质和磁存储装置
公开(公告)号：US06365287B1
公开(公告)日：2002-04-02
申请号：US09487172
申请日：2000-01-19
申请人： Nobuyuki Inaba , Tomoo Yamamoto , Teruaki Takeuchi , Masukazu Igarashi , Yoshio Takahashi
发明人： Nobuyuki Inaba , Tomoo Yamamoto , Teruaki Takeuchi , Masukazu Igarashi , Yoshio Takahashi
IPC分类号： G11B566
CPC分类号： G11B5/65 , G11B5/714
摘要： It is an object of the present invention to provide a magnetic recording medium which has a high level of magnetic anisotropy energy, retains stably the state of recording magnetization within the operating temperature range and is suitable for high-density recording with a low noise level, and a magnetic storage device for the magnetic recording medium. For attaining the above object, the magnetic recording film of the magnetic recording medium is characterized in that its magnetic anisotropy energy constant Ku at an absolute temperature of 300 K is greater than 3.6×106 erg/cc and the average particle diameter is larger than 5 nm and smaller than 12 nm.
摘要翻译：本发明的目的是提供一种具有高水平的磁各向异性能的磁记录介质，将记录磁化的状态稳定地保持在工作温度范围内并且适合于具有低噪声水平的高密度记录，以及用于磁记录介质的磁存储装置。为了达到上述目的，磁记录介质的磁记录膜的特征在于其绝对温度为300K时的磁各向异性能常数Ku大于3.6×10 6 erg / cc，平均粒径大于5nm 并小于12nm。

2. 发明授权

US06627255B2 Method of manufacturing a magnetic recording media 失效
标题翻译：制造磁记录介质的方法
公开(公告)号：US06627255B2
公开(公告)日：2003-09-30
申请号：US10056088
申请日：2002-01-28
申请人： Nobuyuki Inaba , Tomoo Yamamoto , Teruaki Takeuchi , Masukazu Igarashi , Yoshio Takahashi
发明人： Nobuyuki Inaba , Tomoo Yamamoto , Teruaki Takeuchi , Masukazu Igarashi , Yoshio Takahashi
IPC分类号： B05D512
CPC分类号： G11B5/65 , G11B5/714
摘要： It is an object of the present invention to provide a magnetic recording medium which has a high level of magnetic antisotropy energy, retains stably the state of recording magnetization within the operating temperature range and is suitable for high-density recording with a low noise level, and a magnetic storage device for the magnetic recording medium. For attaining the above object, the magnetic recording film of the magnetic recording medium is characterized in that its magnetic anisotropy energy constant Ku at an absolute temperature of 300 K is greater than 3.6×106 erg/cc and the average particle diameter is larger than 5 nm and smaller than 12 nm.
摘要翻译：本发明的目的是提供一种具有高水平的磁性反向能量的磁记录介质，将记录磁化的状态稳定地保持在工作温度范围内，并适用于具有低噪声水平的高密度记录，以及用于磁记录介质的磁存储装置。为了实现上述目的，磁记录介质的磁记录膜的特征在于其绝对温度为300K的磁各向异性能常数Ku大于3.6×10 6 / g / cc，平均粒径较大超过5nm且小于12nm。

3. 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。

4. 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。

5. 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。

6. 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。

7. 发明授权

US06893746B1 Magnetic recording medium with high thermal stability, method for producing the same, and magnetic recording apparatus 失效
标题翻译：具有高热稳定性的磁记录介质，其制造方法和磁记录装置
公开(公告)号：US06893746B1
公开(公告)日：2005-05-17
申请号：US10111608
申请日：2000-10-30
申请人： Fumiyoshi Kirino , Norio Ohta , Kouichirou Wakabayashi , Teruaki Takeuchi , Harumi Hieida , Masaki Sekine , Hiroyuki Awano , Akira Yano , Satoshi Matsunuma , Nobuyuki Inaba , Tetsunori Koda
发明人： Fumiyoshi Kirino , Norio Ohta , Kouichirou Wakabayashi , Teruaki Takeuchi , Harumi Hieida , Masaki Sekine , Hiroyuki Awano , Akira Yano , Satoshi Matsunuma , Nobuyuki Inaba , Tetsunori Koda
IPC分类号： G11B5/00 , G11B5/64 , G11B5/66 , G11B5/74 , G11B5/82 , G11B5/70 , G11B11/105
CPC分类号： G11B5/65 , G11B5/00 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/7325 , G11B5/74 , G11B5/82 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic recording medium comprises an information-recording film and a ferromagnetic film on a substrate. The information-recording film is composed of, for example, an amorphous ferrimagnetic material having perpendicular magnetization. Further, the ferromagnetic film is composed of a magnetic material which has saturation magnetization larger than that of the information-recording film. Accordingly, the leak magnetic flux from the ferromagnetic film is larger than that from the information-recording film. The magnetic recording medium and a magnetic recording apparatus are obtained, which are excellent in thermal stability and which are preferred to perform super high density recording.
摘要翻译：磁记录介质包括在基板上的信息记录膜和铁磁膜。信息记录膜由例如具有垂直磁化的非晶铁磁材料构成。此外，铁磁膜由具有比信息记录膜的饱和磁化强度大的饱和磁化强度的磁性材料构成。因此，来自铁磁膜的泄漏磁通量大于来自信息记录膜的漏磁通量。获得磁性记录介质和磁记录装置，其热稳定性优异，并且优选进行超高密度记录。

8. 发明授权

US06674594B1 Read/write head and magnetic recording device 失效
标题翻译：读/写磁头和磁记录装置
公开(公告)号：US06674594B1
公开(公告)日：2004-01-06
申请号：US10031338
申请日：2002-01-25
申请人： Kouichirou Wakabayashi , Teruaki Takeuchi , Nobuyuki Inaba
发明人： Kouichirou Wakabayashi , Teruaki Takeuchi , Nobuyuki Inaba
IPC分类号： G11B502
CPC分类号： G11B5/127 , G11B5/00 , G11B5/012 , G11B5/3103 , G11B5/3967 , G11B5/4886 , G11B5/596 , G11B5/59627 , G11B5/59655 , G11B5/59683 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic recording apparatus includes a laser light source (132), a recording magnetic head (131) and a magnetoresistive element. The recording magnetic head includes a pair of magnetic poles (100 and 101), between which the magnetoresistive element is interposed. A rotary actuator (Sa) positions the recording magnetic head at a desired track of a magnetic recording medium. A laser beam can be radiated onto the magnetic recording medium to raise the temperature of a region (302) of the medium. This region has a width of the order of the track width. The raised temperature lowers the coercive force of this region, where a recording magnetic field can be applied for high density recording. The rotary actuator may form a yaw angle (&thgr;) with a track of the magnetic recording medium. Even in this case, the recording magnetic head (131) and the reproducing element have no tracking offset from the code track. In addition, if the size of the magnetic poles (100 and 101) of the recording magnetic head are set within a predetermined range, the region (302) heated by the laser beam does not deviate from a recording magnetic field application region (303).
摘要翻译：磁记录装置包括激光源（132），记录磁头（131）和磁阻元件。记录磁头包括一对磁极（100和101），磁阻元件插在其间。旋转致动器（Sa）将记录磁头定位在磁记录介质的期望轨道处。可以将激光束照射到磁记录介质上以升高介质的区域（302）的温度。该区域具有轨道宽度顺序的宽度。升高的温度降低了该区域的矫顽力，其中可以应用记录磁场用于高密度记录。旋转致动器可以与磁记录介质的轨道形成偏航角（θ）。即使在这种情况下，记录磁头（131）和再现元件也没有跟踪轨迹的跟踪偏移。此外，如果将记录磁头的磁极（100和101）的尺寸设定在预定范围内，则由激光束加热的区域（302）不会偏离记录磁场施加区域（303）。

9. 发明授权

US06541125B2 Magnetic recording medium 有权
公开(公告)号：US06541125B2
公开(公告)日：2003-04-01
申请号：US10001995
申请日：2001-12-05
申请人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Teruaki Takeuchi , Yukio Honda
发明人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Teruaki Takeuchi , Yukio Honda
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/656 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： A magnetic recording medium includes a substrate, an underlayer provided on the substrate, a Co alloy magnetic film formed through the underlayer, and a protective film for protecting the magnetic film, wherein the underlayer has a two-layer structure of an lower underlayer contacted with the substrate and an upper underlayer contacted with the Co alloy magnetic film, the upper underlayer is a Co—Crx—My alloy film having a hexagonal close-packed structure, where 25 atomic %≦x+y≦50 atomic %, 0.5 atomic %≦y, nonmagnetic element M is one selected from the group of elements B, Si, Ge, C, Al, P, Ti, V, Nb, Zr, Hf, Mn, Rh, Os, Ir, Re, Pd, Pt, Mo, Ta, W, Ag and Au. Thereby the medium can be increased in its coercive force and can be improved in its thermal stability characteristics.

10. 发明授权

US06383667B1 Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US06383667B1
公开(公告)日：2002-05-07
申请号：US09413813
申请日：1999-10-07
申请人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Teruaki Takeuchi , Yukio Honda
发明人： Masaaki Futamoto , Nobuyuki Inaba , Yoshiyuki Hirayama , Teruaki Takeuchi , Yukio Honda
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/656 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： A magnetic recording medium includes a substrate, an underlayer provided on the substrate, a Co alloy magnetic film formed through the underlayer, and a protective film for protecting the magnetic film, wherein the underlayer has a two-layer structure of an lower underlayer contacted with the substrate and an upper underlayer contacted with the Co alloy magnetic film, the upper underlayer is a Co—Crx—My alloy film having a hexagonal close-packed structure, where 25 atomic %≦x+y≦50 atomic %, 0.5 atomic %≦y, nonmagnetic element M is one selected from the group of elements B, Si, Ge, C, Al, P, Ti, V, Nb, Zr, Hf, Mn, Rh, Os, Ir, Re, Pd, Pt, Mo, Ta, W, Ag and Au. Thereby the medium can be increased in its coercive force and can be improved in its thermal stability characteristics.
摘要翻译：磁记录介质包括基板，设置在基板上的底层，通过底层形成的Co合金磁膜和用于保护磁性膜的保护膜，其中底层具有与下层接触的下层结构基底和与Co合金磁膜接触的上基底层，上底层是具有六方密堆积结构的Co-Crx-My合金膜，其中25原子％<= x + y <= 50原子％，0.5 原子％<= y，非磁性元素M是选自元素B，Si，Ge，C，Al，P，Ti，V，Nb，Zr，Hf，Mn，Rh，Os，Ir，Re，Pd ，Pt，Mo，Ta，W，Ag和Au。因此，介质的矫顽力可以提高，并且可以提高其热稳定性。

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