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1. 发明授权

US06804822B2 Magnetic recording medium and magnetic recording apparatus using same 有权
标题翻译：磁记录介质和使用其的磁记录装置
公开(公告)号：US06804822B2
公开(公告)日：2004-10-12
申请号：US10132775
申请日：2002-04-25
申请人： Junichi Sato , Kosuke Watanabe , Kunio Kojima , Hiroyuki Katayama , Hiroshi Fuji , Kenji Ohta
发明人： Junichi Sato , Kosuke Watanabe , Kunio Kojima , Hiroyuki Katayama , Hiroshi Fuji , Kenji Ohta
IPC分类号： G11B724
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/74 , G11B5/82 , G11B11/10508 , G11B11/10584 , G11B11/10591 , G11B2005/0005 , G11B2005/0021
摘要： A magnetic recording medium, which includes a substrate and an amorphous magnetic layer, made of an amorphous magnetic material, for magnetic recording of data, is provided with an underlayer between the substrate and the amorphous magnetic layer, the underlayer being made of amorphous metal element, and having a mean thickness of 10 nm or less. In this manner, movement of magnetic domain walls of the amorphous magnetic layer is effectively limited by minute irregularities on a surface of the underlayer. This realizes a stable formation of a minute recording mark. This realizes recording having a sufficient signal quality, even when the high-density recording is performed by forming such a minute recording mark that a shortest length of the recording mark is less than 100 nm. Moreover, this allows the magnetic recording medium to have a simplified layer structure. Further, a magnetic recording apparatus magnetically records data onto a magnetic recording medium having the above arrangement, by heating a portion of the magnetic layer by radiating a light beam locally, and by applying a magnetic field on at least part of the portion of the magnetic layer on which the light beam is radiated. This provides a magnetic recording apparatus for high-density recording.
摘要翻译：包括由非晶磁性材料制成的用于磁记录数据的基板和非晶磁性层的磁记录介质在基板和非晶磁性层之间设置有底层，底层由非晶金属元件平均厚度为10nm以下。以这种方式，非晶磁性层的磁畴壁的运动被有效地限制在底层表面上的微小凹凸。这实现了一个稳定的分钟记录标记的形成。这实现了具有足够的信号质量的记录，即使当通过形成记录标记的最短长度小于100nm的这种微小记录标记来执行高密度记录时。此外，这允许磁记录介质具有简化的层结构。此外，磁记录装置将数据磁记录到具有上述结构的磁记录介质上，通过局部辐射光束加热磁性层的一部分，并且通过在磁体的至少一部分上施加磁场光束辐射的层。这提供了用于高密度记录的磁记录装置。

2. 发明授权

US06947236B2 Magnetic signal recording method and magnetic recording-reproduction apparatus 有权
标题翻译：磁信号记录方法和磁记录再现装置
公开(公告)号：US06947236B2
公开(公告)日：2005-09-20
申请号：US09925907
申请日：2001-08-09
申请人： Masaki Hamamoto , Hiroyuki Katayama , Kunio Kojima , Junichi Sato , Kazuhisa Takayama , Kosuke Watanabe
发明人： Masaki Hamamoto , Hiroyuki Katayama , Kunio Kojima , Junichi Sato , Kazuhisa Takayama , Kosuke Watanabe
IPC分类号： G11B11/10 , G11B5/00 , G11B5/02 , G11B11/105
CPC分类号： G11B5/00 , G11B2005/0002 , G11B2005/0021
摘要： A magnetic signal recording method of the present invention superimposes a recording edge of a recordable region on a region where there is substantial equality between (a) a coercive force in a region on a magnetic recording medium in which the coercive force has been varied, and (b) magnetic field intensity, which is generated by a magnetic recording head. The magnetic field intensity has a magnetic field distribution whose lowering rate in an in-track position is maximum in the region. The magnetic recording head, whose recording magnetic field is distributed in a rectangular shape, is used in this way so as to form a magnetic bit having a rectangular shape that is suitable for reproduction performed by a common reproduction head having a rectangular reproduction region, thereby improving an S/N of a reproduction signal dramatically.
摘要翻译：本发明的磁信号记录方法将可记录区域的记录边缘叠加在（a）在矫顽力已经变化的磁记录介质上的区域中的矫顽力之间基本相等的区域，以及（b）由磁记录头产生的磁场强度。磁场强度具有磁场分布，其在轨道位置的下降率在该区域中是最大的。以这种方式使用其记录磁场分布为矩形形状的磁记录头，以便形成具有矩形形状的磁头，该矩形形状适于由具有矩形再现区域的共同再现头执行的再现，由此大大提高了再生信号的S / N。

3. 发明授权

US06876603B2 Information write/read head including an optical slit having a light emitting section whose width is shorter than a light beam diffraction limit 有权
$Information write/read head including an optical slit having a light emitting section whose width is shorter than a light beam diffraction limit$
标题翻译：信息写入/读取头，包括具有宽度短于光束衍射极限的发光部的光学狭缝
公开(公告)号：US06876603B2
公开(公告)日：2005-04-05
申请号：US09864060
申请日：2001-05-23
申请人： Hiroshi Fuji , Hiroyuki Katayama , Kunio Kojima , Kenji Ohta
发明人： Hiroshi Fuji , Hiroyuki Katayama , Kunio Kojima , Kenji Ohta
IPC分类号： G11B11/10 , G11B5/00 , G11B5/02 , G11B5/127 , G11B13/04 , G11B21/10 , G11B11/00
CPC分类号： G11B5/127 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： An information write/read head writes or reads information on or from recording tracks by the heat-assisted system. The information write/read head includes a magnetic head provided in such a manner that a longitudinal direction of a magnetic gap crosses a scanning direction. Further, the information write/read head includes an aperture slit having a length of not less than a diffraction limit of a light beam, and a width shorter than the diffraction limit in the direction orthogonal to the recording track, which is formed in such a manner that the longitudinal direction thereof is aligned in a scanning direction of the recording track.
摘要翻译：信息写入/读取头通过热辅助系统在记录轨道上或从记录轨迹读取信息。信息写入/读取头包括以使得磁隙的纵向方向与扫描方向交叉的方式设置的磁头。此外，信息写入/读取头包括具有不小于光束的衍射极限的长度的孔径狭缝，并且其宽度比在与记录轨道正交的方向上的衍射极限短，使得其纵向方向在记录轨道的扫描方向上对齐。

4. 发明授权

US06816334B2 Information recording and reproducing device and tracking servo system therefor 有权
标题翻译：信息记录和再现装置及跟踪伺服系统
公开(公告)号：US06816334B2
公开(公告)日：2004-11-09
申请号：US09881279
申请日：2001-06-14
申请人： Kosuke Watanabe , Kunio Kojima , Hiroyuki Katayama
发明人： Kosuke Watanabe , Kunio Kojima , Hiroyuki Katayama
IPC分类号： G11B5596
CPC分类号： G11B5/59611 , G11B5/59677 , G11B13/04 , G11B13/045
摘要： An information recording and reproducing device includes a magnetic information detecting section for magnetically detecting magnetic information recorded at a given position on a recording medium, an optical information detecting section for optically detecting optical information recorded at a given position on each track of the recording medium, and a positional control section for controlling a position on the track using the detected magnetic information and optical information.

5. 发明授权

US06333827B1 Magnetic signal reproducing device, magnetic signal reproducing method and magnetic recording medium for high density reproduction 失效
标题翻译：磁信号再现装置，磁信号再现方法和用于高密度再现的磁记录介质
公开(公告)号：US06333827B1
公开(公告)日：2001-12-25
申请号：US09596572
申请日：2000-06-16
申请人： Masaki Hamamoto , Kunio Kojima , Hiroyuki Katayama , Shinzo Sawamura , Junichi Sato
发明人： Masaki Hamamoto , Kunio Kojima , Hiroyuki Katayama , Shinzo Sawamura , Junichi Sato
IPC分类号： G11B502
CPC分类号： G11B5/00 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： The present invention is a magnetic signal reproducing device for reproducing information from a magnetic recording medium in which a polarity of magnetization is inverted at a first temperature during temperature change. The device includes local temperature raising device for locally raising the temperature of the magnetic recording medium, and reproducing device for magnetically detecting information recorded on the magnetic recording medium. In the device, during a reproducing operation, the local temperature raising device forms an area having a lower temperature than the first temperature and an area having a higher temperature than the first temperature within an area in the magnetic recording medium, thereby reducing contribution to reproduced signal from magnetization of an area other than a reproduction target area.
摘要翻译：本发明是一种用于从磁记录介质再现信息的磁信号再现装置，其中磁化极性在温度变化时在第一温度下反转。该装置包括用于局部提高磁记录介质的温度的本地升温装置和用于磁记录在磁记录介质上的信息的再现装置。在该装置中，在再现操作期间，局部升温装置形成具有比第一温度低的温度的区域和具有比磁记录介质中的区域内的第一温度更高的温度的区域，从而减少对再现的贡献来自再生目标区域以外的区域的磁化的信号。

6. 发明授权

US06367924B1 Thermally assisted magnetic recording medium 有权
标题翻译：热辅助磁记录介质
公开(公告)号：US06367924B1
公开(公告)日：2002-04-09
申请号：US09481304
申请日：2000-01-11
申请人： Junichi Sato , Yasushi Ogimoto , Kunio Kojima , Masaki Hamamoto , Hiroyuki Katayama , Shinzo Sawamura
发明人： Junichi Sato , Yasushi Ogimoto , Kunio Kojima , Masaki Hamamoto , Hiroyuki Katayama , Shinzo Sawamura
IPC分类号： B41J201
CPC分类号： G11B11/10584 , G11B5/72 , G11B11/10586 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021 , Y10T428/24802
摘要： The present invention provides a thermally assisted magnetic recording medium consists of a recording region for recording information including a recording layer and a carbon nitride film provided on a side from which light is incident with respect to the recording layer, wherein the recording region is locally heated using light as a heat source for magnetically recording and reproducing information.
摘要翻译：本发明提供了一种热辅助磁记录介质，由用于记录信息的记录区域组成，该记录区域包括记录层和设置在相对于记录层入射的一侧的碳氮化物膜，其中记录区域被局部加热使用光作为用于磁记录和再现信息的热源。

7. 发明授权

US06687195B2 Magnetic recording head and magnetic recording device 有权
标题翻译：磁记录头和磁记录装置
公开(公告)号：US06687195B2
公开(公告)日：2004-02-03
申请号：US10014311
申请日：2001-12-11
申请人： Shintaro Miyanishi , Kunio Kojima , Hiroyuki Katayama , Hiroshi Fuji
发明人： Shintaro Miyanishi , Kunio Kojima , Hiroyuki Katayama , Hiroshi Fuji
IPC分类号： G11B1100
CPC分类号： G11B5/488 , G11B5/127 , G11B5/17 , G11B5/29 , G11B5/3103 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： A light emitting device for focusing a laser beam without adopting an optical lens system is provided, as well as a composite magnetic recording head and a magnetic recording device, which realize a smaller laser spot diameter and a sharp magnetic field distribution, whereby an optical-assisted high density magnetic recording can be realized, and which also realize a simplified head structure, and improvements in productivity and costs. The composite magnetic recording head is prepared by integrally forming a magnetic coil layer for use in magnetic recording at around the center of the surface-emitting laser aperture, and further, a shielding plate is formed at the center of the laser aperture. As a result, a laser beam can be focused on the irradiation surface of the magnetic recording medium at portion right below the shielding member so as to locally heat the irradiated portion, and further a magnetic field for magnetic recording is applied in the laser heated portion, thereby realizing a high density magnetic recording.
摘要翻译：提供了一种不采用光学透镜系统来聚焦激光束的发光装置，以及实现较小的激光光斑直径和尖锐的磁场分布的复合磁记录头和磁记录装置，可以实现辅助的高密度磁记录，并且还实现了简化的头部结构，并且提高了生产率和成本。复合磁记录头通过在表面发射激光器孔的中心周围整体地形成用于磁记录的磁性线圈层，并且还在激光孔的中心形成遮蔽板。结果，可以将激光束聚焦在屏蔽部件正下方的部分的磁记录介质的照射表面上，以便局部加热照射部分，并且在激光加热部分中进一步施加用于磁记录的磁场，从而实现高密度磁记录。

8. 发明授权

US06667146B1 Optical recording medium and reproducing method therefor 失效
标题翻译：光记录介质及其再现方法
公开(公告)号：US06667146B1
公开(公告)日：2003-12-23
申请号：US09632655
申请日：2000-08-04
申请人： Yasushi Ogimoto , Kenji Nakanishi , Hiroshi Fuji , Kunio Kojima , Hiroyuki Katayama
发明人： Yasushi Ogimoto , Kenji Nakanishi , Hiroshi Fuji , Kunio Kojima , Hiroyuki Katayama
IPC分类号： G11B724
CPC分类号： G11B7/252 , B82Y10/00 , G11B7/24 , G11B2007/24312 , G11B2007/24314 , G11B2007/24316 , G11B2007/25706 , G11B2007/2571 , G11B2007/25715 , G11B2007/25716 , Y10S430/146
摘要： An optical recording medium includes a recording layer and a mask layer on a substrate. The mask layer is formed of a material whose light transmittance is decreased by light irradiation and is increased by heating.
摘要翻译：光记录介质包括在基板上的记录层和掩模层。掩模层由光照射下的透光率降低并通过加热而增加的材料形成。

9. 发明授权

US06661745B1 Optical reproducing and recording method, recording medium, and optical device 失效
标题翻译：光学再现和记录方法，记录介质和光学装置
公开(公告)号：US06661745B1
公开(公告)日：2003-12-09
申请号：US09537235
申请日：2000-03-28
申请人： Junji Tominaga , Nobufumi Atoda , Hiroshi Fuji , Hiroyuki Katayama , Kenji Ohta
发明人： Junji Tominaga , Nobufumi Atoda , Hiroshi Fuji , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B700
CPC分类号： B82Y10/00 , G11B7/1387 , G11B7/24065 , G11B11/10584 , G11B11/10586
摘要： An optical device and a recording medium are provided with a recording layer for recording information by radiation of light, and a mask layer which is formed closely to the recording layer, reduces its transmittance of light due to light or heat, and transmits light to the recording layer by using a near-field effect. An optical reproducing and recording method includes the steps of: emitting a laser beam onto the mask layer, generating a near field around an area of the mask layer that has transmittance being reduced by the laser beam, and reproducing or recording optical information in the recording layer by interaction between the near field and the recording layer. With this method, it is possible to provide the optical device, recording medium, and optical reproducing and recording method that can realize a high S/N ratio upon reproducing and recording and that can readily form a recording mark.
摘要翻译：光学器件和记录介质设置有用于通过照射光来记录信息的记录层和与记录层紧密相邻形成的掩模层，减少其由于光或热导致的光的透射率，并将光透射到记录层通过使用近场效应。光学再现和记录方法包括以下步骤：将激光束发射到掩模层上，产生围绕掩模层的区域的近场，该区域具有通过激光束减少的透射率，以及在记录中再现或记录光学信息通过近场和记录层之间的相互作用来形成层。利用这种方法，可以提供在再现和记录时可以实现高S / N比并且可以容易地形成记录标记的光学设备，记录介质和光学再现和记录方法。

10. 发明授权

US06819648B1 Optical sample and method of writing and reading information on the same 失效
标题翻译：光学样本和写入和读取信息的方法相同
公开(公告)号：US06819648B1
公开(公告)日：2004-11-16
申请号：US09585554
申请日：2000-06-02
申请人： Junji Tominaga , Nobufumi Atoda , Hiroshi Fuji , Hiroyuki Katayama , Kenji Ohta
发明人： Junji Tominaga , Nobufumi Atoda , Hiroshi Fuji , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B700
CPC分类号： G11B7/252 , B82Y10/00 , G11B7/24065 , G11B7/243 , G11B7/2534 , G11B2007/25706 , G11B2007/2571 , G11B2007/25715 , G11B2007/25716
摘要： An optical sample includes a mask layer made of a material in which an aperture is produced by a chemical change, which is reversible, upon application of heat or light, and a recording layer provided at a position where an evanescent field produced in the aperture when light is applied to the mask layer can reach. Since the aperture is produced in the mask layer by a chemical change, it can be opened and closed at a high speed and hence a high-speed transfer of information can be achieved.
摘要翻译：光学样品包括掩模层，其由其中通过化学变化产生孔的材料制成，其在施加热或光时是可逆的，以及设置在在孔中产生的ev逝场的位置处的记录层，光应用于掩模层可以达到。由于通过化学变化在掩模层中产生孔径，所以可以高速地打开和关闭孔，因此可以实现高速的信息传递。

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