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11. 发明授权

US5666332A Magneto-optical recording medium permitting an initializing magnetic field smaller than a recording magnetic field, and method of recording there on 失效
标题翻译：允许小于记录磁场的初始化磁场的磁光记录介质及其记录方法
公开(公告)号：US5666332A
公开(公告)日：1997-09-09
申请号：US652810
申请日：1996-05-23
申请人： Junichiro Nakayama , Michinobu Mieda , Junji Hirokane , Akira Takahashi
发明人： Junichiro Nakayama , Michinobu Mieda , Junji Hirokane , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10521 , G11B11/10586 , G11B11/10506
摘要： A magneto-optical recording medium with a first, second, and third magnetic layers which are laminated on a substrate. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer has an in-plane magnetization at room temperature, and has a perpendicular magnetization at or above a temperature falling within a range between room temperature and its Curie temperature. The third magnetic layer has an in-plane magnetization at room temperature, and has a perpendicular magnetization at or above a temperature falling within a range between room temperature and the temperature at which a transition occurs in the second magnetic layer from the in-plane magnetization to the perpendicular magnetization. Accordingly, since the second and third magnetic layers have the in-plane magnetization at room temperature, it is possible to previously direct the magnetization of the third magnetic layer in a single specific direction by the induction of an initializing magnetic field during a rise in temperature caused by a laser beam projection. Therefore, the initializing magnetic field can be set smaller than a recording magnetic field. As a result, it is possible to reduce the size of a recording device.
摘要翻译：一种磁光记录介质，其具有层叠在基板上的第一，第二和第三磁性层。第一磁性层在室温和居里温度之间的温度范围内具有垂直磁化强度。第二磁性层在室温下具有平面内的磁化强度，并且具有等于或高于室温和其居里温度之间的范围内的垂直磁化强度。第三磁性层在室温下具有平面内的磁化强度，并且具有等于或高于室温至第二磁性层中从平面内磁化发生转变的温度之间的范围内的垂直磁化强度到垂直磁化。因此，由于第二和第三磁性层在室温下具有面内磁化，因此可以通过在温度升高期间感应初始化磁场来预先引导第三磁性层的单一特定方向的磁化由激光束投影引起。因此，初始化磁场可以设定为小于记录磁场。结果，可以减小记录装置的尺寸。

12. 发明授权

US5644566A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5644566A
公开(公告)日：1997-07-01
申请号：US432683
申请日：1995-05-02
申请人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Junji Hirokane , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Junji Hirokane , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/105 , G11B7/00
CPC分类号： G11B11/10586 , G11B11/10517
摘要： An intermediate layer is formed between a memory layer and a writing layer. The intermediate layer shows in-plane magnetization at room temperature, and perpendicular magnetization within a temperature range within which the coercive force of the memory layer is lower than that of the writing layer. The Curie point of the intermediate layer is lower than that of the memory layer. Like a conventional method, light-intensity modulation overwriting is performed by irradiating laser light whose intensity has been modulated between high level and low level while applying a recording magnetic field after performing an initialization. Even when there are variations in the raised temperature by the irradiation of laser light of high level, it is possible to perform stable overwriting with light-intensity modulation by satisfactorily restraining the exchange forces between the intermediate layer and the writing layer from causing coupling.
摘要翻译：在存储层和写入层之间形成中间层。中间层在室温下显示出平面内的磁化强度，在存储层的矫顽力低于书写层的温度范围内的垂直磁化强度。中间层的居里点低于存储层的居里点。像传统方法一样，通过在执行初始化之后照射记录磁场的同时照射强度已经被调制在高电平和低电平之间的激光来执行光强调制重写。即使通过高水平的激光照射而升高的温度存在变化，也可以通过令人满意地抑制中间层与书写层之间的交换作用而进行光强调制来进行稳定的重写。

13. 发明授权

US5640374A Magneto-optical recording medium having intermediate layer of in-plane magnetization and method of reproducing from the medium 失效
标题翻译：具有平面内磁化的中间层的磁光记录介质和从介质再现的方法
公开(公告)号：US5640374A
公开(公告)日：1997-06-17
申请号：US659391
申请日：1996-06-06
申请人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
发明人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
IPC分类号： G11B11/10 , G11B7/013 , G11B11/105 , G11B20/10 , G11B11/00
CPC分类号： G11B20/10009 , G11B11/10515 , G11B11/10584 , G11B11/10586 , G11B7/24085
摘要： A recording layer having a recording magnetic domain for recording thereon information is formed. A readout layer for reading the information by the application of a light beam is formed on the recording layer. An intermediate layer made of a film having in-plane magnetization is formed between the recording layer and readout layer to control a magnetic exchange coupling force between the recording layer and readout layer. The readout layer is arranged so that the stable magnetic domain width in the readout layer is larger than that of the recording magnetic domain in the recording layer at room temperature. At a readout temperature achieved by the light beam, the stable magnetic domain width becomes smaller than that of the recording magnetic domain, and the magnetization direction in the recording magnetic domain is copied. Consequently, the information on the recording layer is read only from a section corresponding to a central portion of the light beam through the readout layer by the light beam, and the effect of other magnetic domains adjacent to the magnetic domain to be read in the readout layer can be reduced. It is thus possible to achieve high density recording of information on the recording layer.
摘要翻译：形成具有用于在其上记录信息的记录磁畴的记录层。在记录层上形成用于通过施加光束读取信息的读出层。在记录层和读出层之间形成由具有面内磁化强度的膜构成的中间层，以控制记录层和读出层之间的磁交换耦合力。读出层被布置成使得读出层中的稳定的磁畴宽度大于在室温下在记录层中的记录磁畴的稳定的磁畴宽度。在由光束获得的读出温度下，稳定的磁畴宽度变得小于记录磁畴的磁畴宽度，并且记录磁畴中的磁化方向被复制。因此，记录层上的信息仅从对应于通过光束的读出层的光束的中心部分的部分读取，并且与磁畴相邻的其它磁畴的影响将被读取到读出层可以减少。因此，可以在记录层上实现信息的高密度记录。

14. 发明授权

US5982713A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5982713A
公开(公告)日：1999-11-09
申请号：US719753
申请日：1996-09-25
申请人： Junichiro Nakayama , Junji Hirokane , Michinobu Mieda , Akira Takahashi
发明人： Junichiro Nakayama , Junji Hirokane , Michinobu Mieda , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586
摘要： A magneto-optical recording medium includes first, second, and third magnetic layers laminated in this order. The first magnetic layer, made of a rare earth-transition metal alloy, has a great coercive force at room temperature and is transition metal rich in a temperature range between room temperature and a Curie temperature of the first magnetic layer. The second magnetic layer, made of a rare earth-transition metal alloy, has a Curie temperature higher than that of the first magnetic layer and is rare-earth metal rich at room temperature. The third magnetic layer, made of a rare earth-transition metal alloy, has a Curie temperature higher than that of the first magnetic layer, and a compensation temperature falling in a temperature range between room temperature and the Curie temperature of the third magnetic layer. A magnetization of the third magnetic layer is transferred to the first magnetic layer at a temperature higher than room temperature. A perpendicular magnetic anisotropy Ku3 satisfies 0.3.times.10.sup.6 erg/cc
摘要翻译：磁光记录介质包括依次层叠的第一，第二和第三磁性层。由稀土 - 过渡金属合金制成的第一磁性层在室温下具有很大的矫顽力，并且是在室温和第一磁性层的居里温度之间的温度范围内富含过渡金属。由稀土 - 过渡金属合金制成的第二磁性层的居里温度高于第一磁性层的居里温度，并且在室温下富含稀土金属。由稀土 - 过渡金属合金制成的第三磁性层的居里温度高于第一磁性层的居里温度，并且补偿温度落在室温和第三磁性层的居里温度之间的温度范围内。在高于室温的温度下将第三磁性层的磁化转移到第一磁性层。垂直磁各向异性Ku3满足0.3×10 6 erg / cc

15. 发明授权

US5838645A Magneto-optical recording medium having a plurality of magnetic layers 失效
标题翻译：具有多个磁性层的磁光记录介质
公开(公告)号：US5838645A
公开(公告)日：1998-11-17
申请号：US866594
申请日：1997-05-30
申请人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
发明人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing nonmagnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译：具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层层，以及通过照射光束从中读出数据的再现层，它们在其间插入非磁性中间层的顺序层叠。辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。第一和第二温度满足条件表示为：室温<第二温度<第一温度APPROXLESS光束点中的最大温度。因此，在再现层中立即产生并擦除反向磁畴，并且所得到的再现信号是矩形信号，从而可以提供能够精确地再现高密度记录数据的磁光记录介质。

16. 发明授权

US5684764A Magneto-optical recording medium having a plurality of magnetic layers 失效
标题翻译：具有多个磁性层的磁光记录介质
公开(公告)号：US5684764A
公开(公告)日：1997-11-04
申请号：US595259
申请日：1996-02-01
申请人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
发明人： Junji Hirokane , Michinobu Mieda , Junichiro Nakayama , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing non-magnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译：具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层层，以及通过照射光束从中读出数据的再现层，它们在介于其间的非磁性中间层的顺序层叠。辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。第一和第二温度满足表示为：室温<第二温度<第一温度

17. 发明授权

US5659537A Magneto-optical recording medium and method of reproducing from same 失效
标题翻译：磁光记录介质及其再现方法
公开(公告)号：US5659537A
公开(公告)日：1997-08-19
申请号：US459338
申请日：1995-06-02
申请人： Junji Hirokane , Junichiro Nakayama , Michinobu Mieda , Akira Takahashi
发明人： Junji Hirokane , Junichiro Nakayama , Michinobu Mieda , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10593 , G11B11/10515 , G11B11/10584
摘要： A recording layer including a recording magnetic domain for recording thereon information is formed. A reproducing layer for reproducing information by projecting thereto a light beam is formed on the recording layer. A non-magnetic intermediate layer for intercepting a magnetic exchange coupling force exerted between the recording layer and the reproducing layer is formed between the recording layer and the reproducing layer. The reproducing layer is arranged such that the width of the stable magnetic domain on the reproducing layer at room temperature is larger than the width of the recording magnetic domain in the recording layer. At a reproducing temperature by the light beam, the width of the stable magnetic domain becomes smaller than the width of the recording magnetic domain, and the information is copied by the leakage magnetic flux of the recording magnetic domain. Depending on whether or not the information transferred to the reproducing layer is reproduced, the effects from other magnetic domain adjacent to the magnetic domain to be reproduced from the reproducing layer can be prevented, thereby enabling a high density recording of information on the recording layer.
摘要翻译：形成包括用于在其上记录信息的记录磁畴的记录层。在记录层上形成用于通过向其投射光来再现信息的再现层。在记录层和再现层之间形成用于截取在记录层和再现层之间施加的磁交换耦合力的非磁性中间层。再现层被布置成使得在室温下再现层上的稳定磁畴的宽度大于记录层中记录磁畴的宽度。在光束的再现温度下，稳定磁畴的宽度变得小于记录磁畴的宽度，并且通过记录磁畴的泄漏磁通来复制信息。根据传送到再现层的信息是否被再现，可以防止从再现层再现的与磁畴相邻的其它磁畴的影响，从而能够在记录层上高密度地记录信息。

18. 发明授权

US5498485A Magneto-optical recording medium and manufacturing method thereof 失效
标题翻译：磁光记录介质及其制造方法
公开(公告)号：US5498485A
公开(公告)日：1996-03-12
申请号：US207054
申请日：1994-03-08
申请人： Junichiro Nakayama , Hiroyuki Katayama , Junji Hirokane , Michinobu Mieda
发明人： Junichiro Nakayama , Hiroyuki Katayama , Junji Hirokane , Michinobu Mieda
IPC分类号： G11B11/105 , G11B5/66 , G11B11/00
CPC分类号： G11B11/10582 , G11B11/10586
摘要： A magneto-optical recording medium has a recording layer including two magnetic layers. The magneto-optical recording medium satisfies a condition of .vertline.A.sub.1.K.sub.1 -A.sub.2.K.sub.2 .vertline..ltoreq.0.18 (erg.sup.2 /cm.sup.4) wherein A.sub.1, K.sub.1, A.sub.2, and K.sub.2 respectively represent an exchange constant of a first magnetic layer, a perpendicular magnetic anisotropy of the first magnetic layer, an exchange constant of a second magnetic layer, and a perpendicular magnetic anisotropy of the second magnetic layer. First and Second magnetic layers are made of TbFeCo.
摘要翻译：磁光记录介质具有包括两个磁性层的记录层。磁光记录介质满足条件| A1.K1-A2.K2 |

19. 发明授权

US5402408A Magneto-optical recording method of overwriting without requiring an initialization magnet 失效
标题翻译：重写磁光记录方法，不需要初始化磁铁
公开(公告)号：US5402408A
公开(公告)日：1995-03-28
申请号：US964428
申请日：1992-10-21
申请人： Junji Hirokane , Hiroyuki Katayama , Junichiro Nakayama , Michinobu Mieda , Kenji Ohta
发明人： Junji Hirokane , Hiroyuki Katayama , Junichiro Nakayama , Michinobu Mieda , Kenji Ohta
IPC分类号： G11B11/105 , G11B11/10 , G11B7/24
CPC分类号： G11B11/10584 , G11B11/10506 , G11B11/10519 , G11B11/10586
摘要： A magneto-optical recording method for rewriting of information including the steps of projecting a light beam, whose intensity varies in response to information to be recorded, onto a magnetic thin film with perpendicular magnetization while an external magnetic field of a constant intensity is being applied thereto; and arranging the magnetization direction of an area irradiated with the light beam of the magnetic thin film with perpendicular magnetization in the direction of the external magnetic field when projecting the light beam of high intensity, while arranging it in the direction of demagnetizing field, opposite to the direction of the external magnetic field generated by magnetization in the vicinity of the irradiated area when projecting the light beam of low intensity, and a magneto-optical memory element provided with a base whereon the magnetic thin film with perpendicular magnetization and an in-plane magnetization film are formed. With the above arrangement, an overwriting operation can be carried out through light intensity modulation without requiring an initialization magnet.
摘要翻译：一种用于重写信息的磁光记录方法，包括以下步骤：将强度随着要记录的信息而变化的光束投射到具有恒定强度的外部磁场的垂直磁化的磁性薄膜上，到; 以及当投射高强度光束时，沿着外部磁场的方向，使磁性薄膜的光束照射的区域的磁化方向排列成与退磁场相反的方向当投射低强度光束时，在照射区域附近由磁化产生的外部磁场的方向以及设置有具有垂直磁化和平面内的磁性薄膜的基底的磁光存储元件形成磁化膜。通过上述配置，可以通过光强调制而不需要初始化磁体来进行重写操作。

20. 发明授权

US5347510A Method of manufacturing a master plate where its guide groove has an inclined angle 失效
标题翻译：制造其导向槽具有倾斜角的主板的方法
公开(公告)号：US5347510A
公开(公告)日：1994-09-13
申请号：US4266
申请日：1993-01-14
申请人： Junji Hirokane , Hiroyuki Katayama , Junichiro Nakayama , Michinobu Mieda , Kenji Ohta
发明人： Junji Hirokane , Hiroyuki Katayama , Junichiro Nakayama , Michinobu Mieda , Kenji Ohta
IPC分类号： G01Q80/00 , G11B7/007 , G11B7/24 , G11B7/26
CPC分类号： G11B7/24076 , G11B7/261
摘要： A master plate for manufacturing a stamper for injecting molding of an optical memory device has a substrate having a plurality of guiding grooves on a surface thereof with a predetermined interval. The respective edge portions of the guiding grooves are inclined with respect to the surface of the substrate at an angle not more than 30.degree.. According to a manufacturing method of the master plate, the post-baking process is carried out at a baking temperature of not less than 150.degree. C. and an etching gas containing O.sub.2 gas of 4 (SCCM) to 10 (SCCM) is used. Thus, even when the copying is carried out with respect to the substrate of the optical memory device according to the injection molding process wherein the stamper, which is manufactured based on the above-mentioned master plate, is used, the mold release of the stamper can be carried out without being caught by the substrate. Thus, it is possible to keep the respective shapes of the guiding grooves of the s tamper, thereby enabling of manufacturing the substrate of the optical memory device with high repeatability.
摘要翻译：用于制造用于注射成型光学存储器件的压模的母板具有在其表面上以预定间隔具有多个导向槽的衬底。引导槽的各个边缘部分相对于基板的表面以不大于30°的角度倾斜。根据主板的制造方法，后烘烤处理在不低于150℃的烘烤温度下进行，并且使用含有4（SCCM）至10（SCCM）的O 2气体的蚀刻气体。因此，即使在使用根据上述主板制造的压模的注射成型工艺相对于光学存储器件的基板进行复印时，压模的脱模可以在不被基材捕获的情况下进行。因此，可以保持篡改器的引导槽的各自的形状，从而能够以高重复性制造光学存储器件的基板。

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