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41. 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。

42. 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）。

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