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1. 发明公开

EP0782135A3 Magneto-optical recording medium and method for reproducing therefrom 失效
标题翻译： Magnetooptisches Aufzeichnungsmedium und Verfahren zur Wiedergabe davon
公开(公告)号：EP0782135A3
公开(公告)日：1998-07-08
申请号：EP96309394
申请日：1996-12-20
申请人： SHARP KK
发明人： HIROKANE JUNJI , NAKAYAMA JUNICHIRO , NAKAJIMA JUNSAKU , TAKAHASHI AKIRA , OHTA KENJI
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10515 , G11B11/10584 , G11B11/10589 , G11B11/10593
摘要： A magneto-optical recording medium is arranged so that (1) a first transparent dielectric layer, (2) a reproduction layer showing in-plane magnetization at room temperature while showing perpendicular magnetization in response to temperature rise, (3) a second transparent dielectric layer, (4) a recording layer made of perpendicular magnetization film; and (5) a protective layer are laminated on a substrate in this order. The reproduction layer has a thickness of 5nm to 30nm, the second transparent dielectric layer has a thickness of 6nm to 40nm, and the recording layer has a thickness of 20nm to 80nm. It is possible to separately reproduce individual recording bit even when one or more adjacent recording bits exist within the diameter of the light beam converged onto a target recording bit. This is because the information of a recording magnetic domain of a portion showing in-plane magnetization is masked.
摘要翻译：磁光记录介质被布置成使得（1）第一透明介电层，（2）再现层，其在室温下显示面内磁化同时响应于温度升高而显示垂直磁化，（3）第二透明电介质层，（4）由垂直磁化膜制成的记录层; 和（5）保护层依次层压在基板上。再生层的厚度为5nm〜30nm，第二透明介电层的厚度为6nm〜40nm，记录层的厚度为20nm〜80nm。即使在收敛到目标记录位上的光束的直径内存在一个或多个相邻的记录位，也可以分别再现各个记录位。这是因为屏蔽显示面内磁化的部分的记录磁畴的信息。

2. 发明公开

EP0767457A3 Magneto-optical recording device 失效
标题翻译： Vorrichtung zur magnetooptischen Aufzeichnung
公开(公告)号：EP0767457A3
公开(公告)日：1998-09-30
申请号：EP96119605
申请日：1991-01-18
申请人： SHARP KK
发明人： NAKAYAMA JUNICHIRO , MIYAKE TOMOYUKI , KATAYAMA HIROYUKI , OHTA KENJI
IPC分类号： G11B5/40 , G11B5/60 , G11B11/105 , G11B23/50 , G11B33/14 , G11B11/10 , G11B21/21
CPC分类号： G11B5/6005 , G11B5/40 , G11B5/6011 , G11B5/6082 , G11B11/1058 , G11B23/505 , G11B33/148
摘要： A magneto-optical recording device has a flying head that floats over a magneto-optical disk according to the rotation of the magneto-optical disk. The flying head includes a head slider (11). A solid lubricant (13) is applied to the bottom surface of the head slider facing the magneto-optical disk. Since the solid lubricant makes the flying head contact with the magneto-optical disk smoothly, the scratching and wear of the magneto-optical disk and the flying head decrease. Therefore, the reliability and the durability of the magneto-optical recording device can improve. Physical protrusions and recessions or holes containing fluorocarbon oil therein may be formed instead of the solid lubricant. In this case, the contact area between the flying head and the magneto-optical disk is also smaller than the case where physical protrusions and recessions are not formed. In addition, with a configuration such that thin-film layers made of a fluorocarbon resin having an excellent lubricity are formed on both sides of the bottom surface of the head slider, since the magneto-optical disk comes into contact with the head smoothly, the reliability and the durability of the magneto-optical recording device can improve.
摘要翻译：磁光记录装置具有根据磁光盘的旋转而浮动在磁光盘上的飞头。飞头包括头滑块。将固体润滑剂施加到面向磁光盘的磁头滑块的底表面上。由于固体润滑剂使飞头与磁光盘平滑地接触，所以磁光盘和飞头的划伤和磨损降低。因此，可以提高磁光记录装置的可靠性和耐久性。可以形成其中包含氟碳油的物理突起和凹陷或孔，而不是固体润滑剂。在这种情况下，飞头和磁光盘之间的接触面积也小于没有形成物理突起和凹陷的情况。另外，由于磁头与磁头滑块的底面的两侧形成具有优异的润滑性的氟碳树脂制的薄膜层，所以由于磁光盘顺利地与磁头接触，所以，可以提高磁光记录装置的可靠性和耐久性。

3. 发明公开

EP0720161A3 Magneto-optical recording medium and method of reproducing from same 失效
标题翻译：一种磁光记录介质和再现的方法
公开(公告)号：EP0720161A3
公开(公告)日：1998-07-01
申请号：EP95108230
申请日：1995-05-29
申请人： SHARP KK
发明人： HIROKANE JUNJI , NAKAYAMA JUNICHIRO , MIEDA MICHINOBU , TAKAHASHI AKIRA
IPC分类号： G11B11/10 , G11B11/105
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.

4. 发明公开

EP0803870A3 Magneto-optical recording medium 失效
标题翻译： Magnetooptisches Aufzeichnungsmedium
公开(公告)号：EP0803870A3
公开(公告)日：1998-08-12
申请号：EP97106555
申请日：1997-04-21
申请人： SHARP KK
发明人： HIROKANE JUNJI , NAKAYAMA JUNICHIRO , NAKAJIMA JUNSAKU , TAKAHASHI AKIRA
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10586 , Y10S428/90
摘要： An magneto-optical recording medium includes: a transparent dielectric layer (2); a reproduction layer (3) that is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in temperature; a non-magnetic intermediate layer (4); a recording layer (5) made of a perpendicularly magnetized film; and a protection layer (6), the layers being formed one after another in this order. The recording layer is made of a rare-earth and transition metal alloy, and the rare earth metal is composed of more than two kinds of rare-earth-metal elements containing Gd. The information stored in a magnetic recording domain is masked with respect to a part that is in an in-plane magnetization state. Consequently, recording can be performed with a less powerful laser beam, and each recording bit can be reproduced independently to produce high quality signals even if the converged light beam covers a neighboring recording bit within its radius.
摘要翻译：一种磁光记录介质包括：透明介电层（2）; 再现层（3），其在室温下处于平面内磁化状态并随着温度升高而变为垂直磁化状态; 非磁性中间层（4）; 由垂直磁化膜制成的记录层（5）和保护层（6），各层依次形成。记录层由稀土过渡金属合金构成，稀土类金属由含有Gd的两种以上的稀土类金属元素构成。存储在磁记录域中的信息相对于处于面内磁化状态的部分被掩蔽。因此，即使聚焦光束覆盖其半径内的相邻记录位，也可以用较小功率的激光束执行记录，并且可以独立地再现每个记录位以产生高质量信号。

5. 发明公开

EP0810594A3 Magneto-optical recording medium 失效
标题翻译： MagnetooptischerAufzeichnungsträger
公开(公告)号：EP0810594A3
公开(公告)日：1998-07-22
申请号：EP97303570
申请日：1997-05-27
申请人： SHARP KK
发明人： HIROKANE JUNJI , NAKAYAMA JUNICHIRO , TAKAHASHI AKIRA
IPC分类号： G11B11/10 , G11B11/105
CPC分类号： G11B11/10586 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium includes a reproducing layer (1) which has in-plane magnetization at room temperature and has perpendicular magnetization at an elevated temperature of not less than a critical temperature, a recording layer (4) made of a perpendicular magnetization film for recording information, an intermediate layer (3) made of a non-magnetic film formed between the reproducing layer and the recording layer, and an in-plane magnetization layer (2) adjacent to the reproducing layer, in which magnetization is reduced at a temperature in a vicinity of the critical temperature. According to the described magneto-optical recording medium, since information recorded in a recording magnetic domain of a portion having the in-plane magnetization is masked, even in the case where adjacent recording bits fall within a diameter of a spot of a converged light beam, each recording bit can be reproduced separately, thereby obtaining a quality reproduced signal.
摘要翻译：一种磁光记录介质包括：在室温下具有平面内磁化并且在不低于临界温度的高温下具有垂直磁化的再现层（1）;由垂直磁化膜（4）构成的记录层（4）为了记录信息，在再现层和记录层之间形成的由非磁性膜构成的中间层（3）和与再现层相邻的面内磁化层（2），其中磁化在温度在临界温度附近。根据所述的磁光记录介质，由于记录在具有面内磁化的部分的记录磁畴中的信息被掩蔽，所以即使在相邻记录位落入会聚光束的光斑直径内的情况下每个记录位可以被单独再现，从而获得质量再现信号。

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