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1.发明申请公开(公告)号：US20090106783A1
公开(公告)日：2009-04-23
申请号：US12316592
申请日：2008-12-12
CPC分类号： G11B11/10536 , G11B5/1278 , G11B5/314 , G11B7/1387 , G11B11/10541 , G11B11/1058 , G11B2005/0002 , G11B2005/0021
摘要： The present invention provides an electromagnetic field generating element, an information recording/reproducing head, and an information recording/reproducing apparatus. The electromagnetic field generating element makes it possible to restrain magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for use in thermally assisted magnetic field recording/reproduction using a near field. The information recording/reproducing head and the information recording/reproducing apparatus can carry out high frequency magnetic recording/reproducing.The electromagnetic field generating element of the present invention includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiated, to the plate-like-shaped conductor, laser light substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of the near field in the plate-like-shaped conductor. Moreover, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.
摘要翻译： 本发明提供一种电磁场产生元件，信息记录/再现头和信息记录/再现装置。 电磁场产生元件使得可以抑制在使用近场的热辅助磁场记录/再现中使用的高频记录/再现头中的磁场衰减或磁场延迟。 信息记录/再现头和信息记录/再现装置可以执行高频磁记录/再现。 本发明的电磁场产生元件包括：（i）基板，（ii）各自设置在基板上并各自用作支撑部分的导体，（iii）设置在导体上的板状导体和（ iv）设置在基板上的半导体激光元件。 半导体激光元件对板状导体照射基本上平行于板状导体的延伸平坦表面的激光。 这导致板状导体中的近场的产生。 此外，通过向板状导体供给电流来产生磁场。
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2.发明授权公开(公告)号：US07489597B2
公开(公告)日：2009-02-10
申请号：US11238024
申请日：2005-09-27
CPC分类号： G11B11/10536 , G11B5/1278 , G11B5/314 , G11B7/1387 , G11B11/10541 , G11B11/1058 , G11B2005/0002 , G11B2005/0021
摘要： An electromagnetic field generating element restrains magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for thermally assisted magnetic field recording/reproduction using a near field. An information recording/reproducing head and an information recording/reproducing apparatus carry out high frequency magnetic recording/reproduction. The electromagnetic field generating element includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiates laser light to the plate-like-shaped conductor substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of a near field in the plate-like-shaped conductor. In addition, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.
摘要翻译： 电磁场产生元件抑制用于使用近场的热辅助磁场记录/再现的高频记录/再现头中的磁场衰减或磁场延迟。 信息记录/再现头和信息记录/再现装置执行高频磁记录/再现。 电磁场产生元件包括：（i）衬底，（ii）各自设置在衬底上并各自用作支撑部分的导体，（iii）设置在导体上的板状导体，以及（iv）半导体 激光元件设置在基板上。 半导体激光元件将激光照射到与板状导体的延伸的平坦面平行的板状导体上。 这导致在板状导体中产生近场。 另外，通过向板状导体供给电流来产生磁场。
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3.发明申请公开(公告)号：US20060075417A1
公开(公告)日：2006-04-06
申请号：US11238024
申请日：2005-09-27
CPC分类号： G11B11/10536 , G11B5/1278 , G11B5/314 , G11B7/1387 , G11B11/10541 , G11B11/1058 , G11B2005/0002 , G11B2005/0021
摘要： The present invention provides an electromagnetic field generating element, an information recording/reproducing head, and an information recording/reproducing apparatus. The electromagnetic field generating element makes it possible to restrain magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for use in thermally assisted magnetic field recording/reproduction using a near field. The information recording/reproducing head and the information recording/reproducing apparatus can carry out high frequency magnetic recording/reproducing. The electromagnetic field generating element of the present invention includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiated, to the plate-like-shaped conductor, laser light substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of the near field in the plate-like-shaped conductor. Moreover, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.
摘要翻译： 本发明提供一种电磁场产生元件，信息记录/再现头和信息记录/再现装置。 电磁场产生元件使得可以抑制在使用近场的热辅助磁场记录/再现中使用的高频记录/再现头中的磁场衰减或磁场延迟。 信息记录/再现头和信息记录/再现装置可以执行高频磁记录/再现。 本发明的电磁场产生元件包括：（i）基板，（ii）各自设置在基板上并各自用作支撑部分的导体，（iii）设置在导体上的板状导体和（ iv）设置在基板上的半导体激光元件。 半导体激光元件对板状导体照射基本上平行于板状导体的延伸平坦表面的激光。 这导致板状导体中的近场的产生。 此外，通过向板状导体供给电流来产生磁场。
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4.发明授权公开(公告)号：US07690009B2
公开(公告)日：2010-03-30
申请号：US12316592
申请日：2008-12-12
CPC分类号： G11B11/10536 , G11B5/1278 , G11B5/314 , G11B7/1387 , G11B11/10541 , G11B11/1058 , G11B2005/0002 , G11B2005/0021
摘要： An electromagnetic field generating element restrains magnetic field attenuation or magnetic field delay in a high frequency recording/reproducing head for thermally assisted magnetic field recording/reproduction using a near field. An information recording/reproducing head and an information recording/reproducing apparatus carry out high frequency magnetic recording/reproduction. The electromagnetic field generating element includes: (i) a substrate, (ii) conductors each provided on the substrate and each serving as a supporting section, (iii) a plate-like-shaped conductor provided on the conductors and (iv) a semiconductor laser element provided on the substrate. The semiconductor laser element irradiates laser light to the plate-like-shaped conductor substantially parallel to an extending flat surface of the plate-like-shaped conductor. This causes generation of a near field in the plate-like-shaped conductor. In addition, a magnetic field is generated by supplying a current to the plate-like-shaped conductor.
摘要翻译： 电磁场产生元件抑制用于使用近场的热辅助磁场记录/再现的高频记录/再现头中的磁场衰减或磁场延迟。 信息记录/再现头和信息记录/再现装置执行高频磁记录/再现。 电磁场产生元件包括：（i）衬底，（ii）各自设置在衬底上并各自用作支撑部分的导体，（iii）设置在导体上的板状导体，以及（iv）半导体 激光元件设置在基板上。 半导体激光元件将激光照射到与板状导体的延伸的平坦面平行的板状导体上。 这导致在板状导体中产生近场。 另外，通过向板状导体供给电流来产生磁场。
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公开(公告)号：US08766275B2
公开(公告)日：2014-07-01
申请号：US13574993
申请日：2010-12-28
申请人： Naoyasu Iketani , Tomohiro Nozawa , Yoshiaki Nozaki , John K. Twynam , Hiroshi Kawamura , Keiichi Sakuno
发明人： Naoyasu Iketani , Tomohiro Nozawa , Yoshiaki Nozaki , John K. Twynam , Hiroshi Kawamura , Keiichi Sakuno
IPC分类号： H01L31/0256
CPC分类号： H01L27/0605 , H01L27/0629
摘要： This composite semiconductor device has a normally-on first field effect transistor and a normally-off second field effect transistor connected in series between first and second terminals, gates of the first and second field effect transistors being connected to second and third terminals, respectively, and N diodes being connected in series in a forward direction between a drain and a source of the second field effect transistor. Therefore, a drain-source voltage (Vds) of the second field effect transistor can be restricted to a voltage not higher than a withstand voltage of the second field effect transistor.
摘要翻译： 该复合半导体器件具有在第一和第二端子之间串联连接的常开第一场效应晶体管和常关第二场效应晶体管，第一和第二场效应晶体管的栅极分别连接到第二和第三端子， 并且N个二极管在第二场效应晶体管的漏极和源极之间沿正向串联连接。 因此，第二场效应晶体管的漏极 - 源极电压（Vds）可以被限制在不高于第二场效应晶体管的耐受电压的电压。
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6.发明授权
公开(公告)号：US5637394A
公开(公告)日：1997-06-10
申请号：US356857
申请日：1994-12-15
申请人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
发明人： Junsaku Nakajima , Naoyasu Iketani , Yoshiteru Murakami , Akira Takahashi , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10584 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium comprising a readout layer and a recording layer has a relationship that an external magnetic field H1 is smaller than an external magnetic field H4, where the H1 is a minimum external magnetic field necessary to make a magnetization direction of the readout layer direct to the direction reverse to a magnetization direction of the recording layer substantially at the room temperature, and the H4 is a maximum external magnetic field necessary to make the magnetization direction of the readout layer direct to the direction same as the magnetization direction of the recording layer at an high temperature not lower than a predetermined temperature. Moreover, the magneto-optical disk is provided, between the readout layer and the recording layer, with an intermediate layer which inhibits an effective bias magnetic field from the recording layer to the readout layer at the room temperature. Since it is possible to reproduce only the information in the high-temperature area close to the center of the laser beam irradiated during reproducing, recording density is improved. Furthermore, since an initializing magnetic field at reproducing is not necessary and the reproducing magnetic field can be made smaller, the apparatus can be made smaller and the electric power consumption can be decreased.
摘要翻译： 包括读出层和记录层的磁光记录介质具有外部磁场H1小于外部磁场H4的关系，其中H1是使读出磁化方向发生所需的最小外部磁场 层直接与基本上在室温下的记录层的磁化方向相反的方向，并且H4是使读出层的磁化方向直到与磁化方向相同的方向所需的最大外部磁场 记录层在不低于预定温度的高温下进行。 此外，在读出层和记录层之间设置磁光盘，其中间层在室温下抑制从记录层到读出层的有效偏置磁场。 由于只能再现靠近在再现期间照射的激光束的中心的高温区域的信息，所以记录密度提高。 此外，由于不需要再现时的初始化磁场并且可以使再现磁场更小，所以可以使装置更小，并且可以降低电力消耗。
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7.发明授权
公开(公告)号：US5563852A
公开(公告)日：1996-10-08
申请号：US350317
申请日：1994-12-05
IPC分类号： C23C14/18 , C23C14/34 , C23C14/56 , G11B11/105 , G11B5/66
CPC分类号： C23C14/3414 , C23C14/185 , C23C14/568 , G11B11/10582 , G11B11/10586 , G11B11/10589
摘要： A magneto-optical recording medium includes a readout layer has in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to perpendicular magnetization when temperature thereof is raised, and a recording layer for recording thereon information. The composition of the readout layer varies in a direction perpendicular to the surface thereof, and in the readout layer, the Co density on the light incident side is higher than the Co density on the interface between the readout layer and the recording layer. Therefore, the Curie temperature on the reproducing light incident side of the readout layer is high and the the polar Kerr rotation angle in reproducing increases, thereby achieving improvements in a reproducing signal quality. On the other hand, since the Curie temperature on the interface is low, the shift of the threshold temperature at which a transition occurs from in-plane to perpendicular by the magnetic interaction between the layers can be suppressed, thereby achieving a high quality reproducing signal without changing the laser power required for reproduction very much.
摘要翻译： 磁光记录介质包括读出层，其在室温下具有面内磁化，并且其温度升高时从面内磁化转变为垂直磁化，并且在其上记录信息的记录层。 读出层的组成在垂直于其表面的方向上变化，在读出层中，光入射侧的Co密度高于读出层与记录层之间的界面上的Co密度。 因此，读出层的再现光入射侧的居里温度高，再现时的极性克尔旋转角度增加，从而实现再现信号质量的改善。 另一方面，由于界面的居里温度低，所以可以抑制通过层之间的磁相互作用从平面到垂直发生的阈值温度的偏移，从而实现高质量再现信号 而不需要更改再生所需的激光功率。
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8.发明授权Optical recording medium having a wobbling section for recording address information and methods of recording and reproduction using same 失效具有用于记录地址信息的摆动部分和使用其的记录和再现方法的光学记录介质
公开(公告)号：US5933411A
公开(公告)日：1999-08-03
申请号：US890401
申请日：1997-07-09
申请人： Tetsuya Inui , Hideaki Sato , Junichiro Nakayama , Naoyasu Iketani , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
发明人： Tetsuya Inui , Hideaki Sato , Junichiro Nakayama , Naoyasu Iketani , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
CPC分类号： G11B7/005 , G11B7/00718 , G11B7/00745 , G11B7/0901 , G11B7/261 , G11B11/10578 , G11B11/10582 , G11B7/0938 , G11B7/24
摘要： An optical disk has address recording sections each of which has a wobbled part of one of side walls of a groove. Each address recording section is formed by providing convexes of a groove in an adjacent land so as to widen the groove. With the wobbles thus provided in a concavo-convex form, address information is recorded. Besides, the address recording sections thus provided in the grooves are linearly disposed in radial directions of the optical disk. By thus arranging the optical disk on whose grooves and/or lands information is recorded, mixing of wobble frequency components in reproduced information signals does not occur, the sector method is applicable to the optical disk, and information signals of high quality can be obtained.
摘要翻译： 光盘具有地址记录部分，每个地址记录部分具有凹槽的一个侧壁的摆动部分。 每个地址记录部分通过在相邻的凸台中提供凹槽的凸起来形成，以便加宽凹槽。 由于以这样提供的摆动形式为凹凸形式，所以记录地址信息。 此外，这样设置在凹槽中的地址记录部分在光盘的径向上线性地设置。 通过这样布置记录有槽和/或焊盘信息的光盘，不会发生重放信息信号中的摆动频率分量的混合，扇区方法可应用于光盘，并且可以获得高质量的信息信号。
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公开(公告)号：US5824426A
公开(公告)日：1998-10-20
申请号：US535967
申请日：1995-09-28
CPC分类号： C23C14/3407 , C23C14/185 , G11B11/10582 , G11B11/10586 , G11B7/26
摘要： A magneto-optical recording medium includes a readout layer having in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to a perpendicular magnetization when temperature rises, and a recording layer for storing information thereon magneto-optically. In the readout layer made of GdFeCo by adding Nd thereto, an amount of Nd to be added changes in a direction perpendicular to its film surface, and an amount of Nd is larger on a light incidence side than on the other side. As a result, even when a laser with a short wavelength is used, high density recording can be achieved as undesirable recording and reproducing operations due to a change in a magnetic interaction is prevented and also deterioration in quality of a reproducing signal is prevented.
摘要翻译： 磁光记录介质包括在室温下具有面内磁化的读出层，并且其中当温度升高时从面内磁化转变为垂直磁化的过渡;以及用于在磁光上存储信息的记录层。 在通过添加Nd而由GdFeCo制成的读出层中，要添加的Nd的量在垂直于其膜表面的方向上变化，并且Nd的量在光入射侧比在另一侧更大。 结果，即使使用具有短波长的激光器，由于防止了磁相互作用的变化而导致由于不期望的记录和再现操作而导致高密度记录，并且也防止再现信号的质量劣化。
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10.发明授权Method of manufacturing a magneto-optical recording medium having a readout layer with varying composition and curie temperature 失效具有具有不同组成和居里温度的读出层的磁光记录介质的制造方法
公开(公告)号：US5764601A
公开(公告)日：1998-06-09
申请号：US685115
申请日：1996-07-23
CPC分类号： C23C14/3414 , C23C14/185 , C23C14/568 , G11B11/10582 , G11B11/10586 , G11B11/10589
摘要： A magneto-optical recording medium includes a readout layer has in-plane magnetization at room temperature and in which a transition occurs from in-plane magnetization to perpendicular magnetization when temperature thereof is raised, and a recording layer for recording thereon information. The composition of the readout layer varies in a direction perpendicular to the surface thereof, and in the readout layer, the Co density on the light incident side is higher than the Co density on the interface between the readout layer and the recording layer. Therefore, the Curie temperature on the reproducing light incident side of the readout layer is high and the the polar Kerr rotation angle in reproducing increases, thereby achieving improvements in a reproducing signal quality. On the other hand, since the Curie temperature on the interface is low, the shift of the threshold temperature at which a transition occurs from in-plane to perpendicular by the magnetic interaction between the layers can be suppressed, thereby achieving a high quality reproducing signal without changing the laser power required for reproduction very much.
摘要翻译： 磁光记录介质包括读出层，其在室温下具有面内磁化，并且其温度升高时从面内磁化转变为垂直磁化，并且在其上记录信息的记录层。 读出层的组成在垂直于其表面的方向上变化，在读出层中，光入射侧的Co密度高于读出层与记录层之间的界面上的Co密度。 因此，读出层的再现光入射侧的居里温度高，再现时的极性克尔旋转角度增加，从而实现再现信号质量的改善。 另一方面，由于界面的居里温度低，所以可以抑制通过层之间的磁相互作用从平面到垂直发生的阈值温度的偏移，从而实现高质量再现信号 而不需要更改再生所需的激光功率。
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