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1. 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。

2. 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。

3. 发明授权

US06603619B1 Magnetic storage medium and heat assisted recording and reproduction method 有权
标题翻译：磁存储介质和热辅助记录和再现方法
公开(公告)号：US06603619B1
公开(公告)日：2003-08-05
申请号：US09479255
申请日：2000-01-07
申请人： Kunio Kojima , Yasushi Ogimoto , Shinzo Sawamura , Hiroyuki Katayama
发明人： Kunio Kojima , Yasushi Ogimoto , Shinzo Sawamura , Hiroyuki Katayama
IPC分类号： G11B502
CPC分类号： G11B5/74 , G11B5/64 , G11B2005/0016 , G11B2005/0018 , G11B2005/0021
摘要： A magnetic storage medium includes a magnetic storage medium that exhibits a magnetic compensation temperature specified higher than room temperature to minimize effects of heat generated by a head using magneto-resistance effect. In a heat assisted recording and reproduction method using such a magnetic storage medium, during reproduction, the S/N ratio in a reproduction signal is enhanced by optimizing the bias current applied to the head using magneto-resistance effect. A magnetic storage medium and a heat assisted recording and reproduction method using such a magnetic storage medium whereby information is magnetically recorded and reproduced by heating a read-out domain are offered that enables signal reproduction with a good S/N ratio despite possible use of a head exhibiting magneto-resistance effect.
摘要翻译：磁存储介质包括表现出高于室温的磁补偿温度的磁存储介质，以最小化使用磁阻效应的磁头所产生的热的影响。在使用这种磁存储介质的热辅助记录和再现方法中，在再现期间，通过使用磁阻效应优化施加到磁头的偏置电流来增强再现信号中的S / N比。提供使用这样的磁存储介质的磁存储介质和热辅助记录和再现方法，其中信息通过加热读出域磁记录和再现，其使得能够以良好的S / N比进行信号再现，尽管可能使用头显示磁阻效应。

4. 发明授权

US06593014B1 Thermomagnetic recording medium, thermomagnetic recording and reproducing method, and thermomagnetic recording and reproducing device 有权
标题翻译：热磁记录介质，热磁记录和再现方法以及热磁记录和再现装置
公开(公告)号：US06593014B1
公开(公告)日：2003-07-15
申请号：US09580812
申请日：2000-05-26
申请人： Yasushi Ogimoto , Kenji Nakanishi , Masaki Hamamoto , Kunio Kojima , Hiroyuki Katayama
发明人： Yasushi Ogimoto , Kenji Nakanishi , Masaki Hamamoto , Kunio Kojima , Hiroyuki Katayama
IPC分类号： G11B1100
CPC分类号： G11B11/10584 , G11B5/74 , G11B5/82 , G11B11/10515 , G11B11/10586 , G11B11/10595 , G11B2005/0005 , G11B2005/0021 , Y10T428/12611
摘要： A thermomagnetic recording medium includes a thermal change layer whose thermal conductivity is induced to change by a metal-to-insulator transition, is greater on a lower temperature side of a transition temperature and is smaller on a higher temperature side thereof. A thermomagnetic recording method includes setting a recording or reproducing temperature higher than the temperature of the recording medium at the circumference of a light spot and higher than a threshold temperature for change of the thermal conductivity of the thermal change layer. A thermomagnetic recording and reproducing device is provided with the above-mentioned thermomagnetic recording medium, an optical pickup and a magnetic head and conducts recording and reproduction by the above-mentioned thermomagnetic recording and reproducing device.
摘要翻译：热磁记录介质包括其热导率被金属 - 绝缘体转变而变化的热变化层在转变温度的较低温度侧较大，并且在其较高温度侧较小。热磁记录方法包括在光点的周围设置高于记录介质的温度的记录或再现温度，并且高于用于改变热变性层的热导率的阈值温度。具有上述热磁记录介质，光拾取器和磁头的热磁记录和再现装置，并通过上述热磁记录和再现装置进行记录和再现。

5. 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。

6. 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。

7. 发明授权

US06721237B2 Composite magnetic head device 有权
标题翻译：复合磁头装置
公开(公告)号：US06721237B2
公开(公告)日：2004-04-13
申请号：US09803312
申请日：2001-03-09
申请人： Kunio Kojima , Masaki Hamamoto , Junichi Satoh , Hiroyuki Katayama
发明人： Kunio Kojima , Masaki Hamamoto , Junichi Satoh , Hiroyuki Katayama
IPC分类号： G11B1100
CPC分类号： G11B5/00 , G11B5/102 , G11B5/105 , G11B5/127 , G11B5/3103 , G11B5/3967 , G11B19/04 , G11B2005/0002 , G11B2005/0005 , G11B2005/001 , G11B2005/0021
摘要： A composite magnetic head device includes a recording head and a reproducing head for magnetically recording and reproducing information on and from a recording medium, and further includes heat sources for heating the recording medium when recording and reproducing. As the heat sources, diffraction grating patterns for the recording head and the reproducing head are formed independently. With this structure, when recording and reproducing information based on the thermal distribution of the recording medium heated by the heat sources, the thermal damage on the recording medium can be suppressed, and the likelihood of such problem that the recording medium is heated too much and the information recorded in the heated portion are erased can be prevented.
摘要翻译：复合磁头装置包括记录头和用于在记录介质上磁记录和再现信息的再现头，还包括用于在记录和再现时加热记录介质的热源。作为热源，记录头和再现头的衍射光栅图案独立地形成。利用这种结构，当基于由热源加热的记录介质的热分布来记录和再现信息时，可以抑制记录介质上的热损伤，以及记录介质被加热太多的可能性，可以防止记录在加热部分中的信息被擦除。

8. 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。

9. 发明授权

US06400654B1 Magneto-optical recording and reproducing device capable of suppressing cross talk 失效
标题翻译：能够抑制串扰的磁光记录再现装置
公开(公告)号：US06400654B1
公开(公告)日：2002-06-04
申请号：US09530887
申请日：2000-07-03
申请人： Shinzo Sawamura , Hiroyuki Katayama
发明人： Shinzo Sawamura , Hiroyuki Katayama
IPC分类号： G11B1100
CPC分类号： G11B11/10532 , G11B5/00 , G11B11/10504 , G11B11/10554 , G11B11/10586 , G11B13/045 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021
摘要： The present magnetic recording and reproducing device is provided with a magnetic head (5), which, during recording, applies an external magnetic field to a recording medium (6) having a recording layer made of a ferrimagnetic material, and with a laser light source, which increases the temperature of the recording medium (6) in domains (Tr1 and Tr2) which are opposite the magnetic head (5), but exclude a track to be recorded (Tr), which is a domain for recording. Consequently, a magnetic recording and reproducing device can be provided which is capable of suppressing crosstalk and realizing higher recording density than conventionally.
摘要翻译：本磁记录和再现装置设置有磁头（5），其在记录期间将外部磁场施加到具有由铁磁材料制成的记录层的记录介质（6），并且具有激光光源，这增加了与磁头（5）相对的域（Tr1和Tr2）中的记录介质（6）的温度，但是排除了用于记录的域的要记录的轨道（Tr）。因此，可以提供能够抑制串扰并实现比传统方式更高的记录密度的磁记录和再现装置。

10. 发明授权

US06500530B1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06500530B1
公开(公告)日：2002-12-31
申请号：US09412146
申请日：1999-10-05
申请人： Shinzo Sawamura , Hiroyuki Katayama
发明人： Shinzo Sawamura , Hiroyuki Katayama
IPC分类号： G11B566
CPC分类号： G11B5/65 , G11B5/00 , G11B5/66 , G11B5/74 , G11B2005/0002 , G11B2005/0005 , G11B2005/0021 , Y10S428/90 , Y10T428/24942
摘要： A magnetic recording medium of the present invention comprises a first magnetic layer and a second magnetic layer each having different magnetization, coercive force, and temperature characteristics. By magnetically coupling the first and second magnetic layers to each other, gradual temperature dependence of magnetization can be realized.
摘要翻译：本发明的磁记录介质包括具有不同磁化强度，矫顽磁力和温度特性的第一磁性层和第二磁性层。通过将第一和第二磁性层彼此磁耦合，可以实现磁化的逐渐的温度依赖性。

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