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1. 发明公开

EP1422708A1 Magneto-optical memory medium and reproducing method thereof 失效
标题翻译： Magnetooptisches Speichermedium unddazugehörigesWiedergabeverfahren
公开(公告)号：EP1422708A1
公开(公告)日：2004-05-26
申请号：EP04003323.5
申请日：1998-03-06
申请人： SHARP KABUSHIKI KAISHA
发明人： Takahashi, Akira , Mieda, Michinobu , Iketani, Naoyasu , Mori, Go , Nakajima, Junsaku , Murakami, Yoshiteru , Hirokane, Junji
IPC分类号： G11B11/105
CPC分类号： G11B11/10584 , G11B11/10515 , G11B11/10586 , G11B11/10593
摘要： A magneto-optical memory medium according to the present invention comprises a reproducing layer, which has in-plane magnetization at room temperature and perpendicular magnetization when heated to above a predetermined temperature by a reproducing light beam; a recording layer, which is magnetostatically coupled to the reproducing layer; and an in-plane magnetized layer, provided adjacent to the recording layer, which has a Curie temperature at the above-mentioned predetermined temperature. In this medium, at temperatures below the predetermined temperature, signals recorded at high density in the recording layer are masked, and the above-mentioned magnetostatic coupling is suppressed, by magnetic masking by the in-plane magnetized layer. At temperatures above the predetermined temperature, however, within a domain forming part of the in-plane magnetized layer, the recording layer and the reproducing layer are magnetostatically coupled, and a recording bit of the recording layer is copied and expanded to a magnetic domain in the reproducing layer. Accordingly, with this medium, by reproducing from an expanded magnetic domain of the reproducing layer, even information from recording bits recorded at high density can be reproduced with high signal quality.
摘要翻译：根据本发明的磁光存储介质包括再现层，其在室温下具有面内磁化并且通过再现光束被加热到高于预定温度时的垂直磁化; 记录层，其被静磁耦合到再现层; 以及与记录层相邻的面内磁化层，居里温度在上述规定温度。在该介质中，在低于预定温度的温度下，记录层中以高密度记录的信号被掩蔽，并且通过面内磁化层的磁屏蔽来抑制上述静磁耦合。然而，在高于预定温度的温度下，在形成面内磁化层的一部分的区域内，磁静电耦合记录层和再现层，并且将记录层的记录位复制并扩展到磁畴再现层。因此，利用该介质，通过从再现层的扩展磁畴再现，可以以高信号质量再现以高密度记录的记录位的信息。

2. 发明授权

EP0974961B1 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：一种磁光记录介质和用于记录和再现的方法和训练的磁光记录介质的光学头
公开(公告)号：EP0974961B1
公开(公告)日：2003-04-02
申请号：EP99120141.9
申请日：1993-11-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Murakami, Yoshiteru , Hirokane, Junji , Nakayama, Junichiro , Nakajima, Junsaku , Takahashi, Akira , Ohta, Kenji , Iketani, Naoyasu
IPC分类号： G11B11/10
CPC分类号： G11B7/126 , G11B7/00718 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10584 , G11B11/10586 , G11B11/10595 , Y10S428/90

3. 发明公开

EP0658891A3 Magneto-optical recording medium and method of reproducing magneto-optical information using thereof 失效
标题翻译：一种磁光记录介质和再现的磁 - 光信息的方法。
公开(公告)号：EP0658891A3
公开(公告)日：1995-09-27
申请号：EP94309416.9
申请日：1994-12-16
申请人： SHARP KABUSHIKI KAISHA
发明人： Nakajima, Junsaku , Murakami, Yoshiteru , Katayama, Hiroyuki , Iketani, Naoyasu , Takahashi, Akira , Ohta, Kenji
IPC分类号： G11B11/10
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.

4. 发明公开

EP0658891A2 Magneto-optical recording medium and method of reproducing magneto-optical information using thereof 失效
标题翻译：磁光记录介质和使用其的磁光信息的再现方法
公开(公告)号：EP0658891A2
公开(公告)日：1995-06-21
申请号：EP94309416.9
申请日：1994-12-16
申请人： SHARP KABUSHIKI KAISHA
发明人： Nakajima, Junsaku , Murakami, Yoshiteru , Katayama, Hiroyuki , Iketani, Naoyasu , Takahashi, Akira , Ohta, Kenji
IPC分类号： G11B11/10
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是使读出的磁化方向成为必需的最小外部磁场层指向与记录层的磁化方向大致相反的方向，并且H4是使读出层的磁化方向指向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。而且，磁光盘在读出层和记录层之间设置有中间层，该中间层在室温下抑制从记录层到读出层的有效偏置磁场。由于可以仅再现在再现期间照射的激光束的中心附近的高温区域中的信息，因此记录密度得到改善。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，所以可以使设备更小并且可以减少电力消耗。

5. 发明授权

EP0818778B1 Optical disc with dispersed wobble sections, manufacturing method and recording and reproducing method 失效
标题翻译：光盘具有分散的摆动部，制造方法，以及用于记录和再现的方法
公开(公告)号：EP0818778B1
公开(公告)日：2004-06-23
申请号：EP97111464.0
申请日：1997-07-07
申请人： SHARP KABUSHIKI KAISHA
发明人： Inui, Tetsuya , Sato, Hideaki , Nakayama, Junichiro , Iketani, Naoyasu , Mieda, Michinobu , Murakami, Yoshiteru , Hirokane, Junji , Takahashi, Akira
IPC分类号： G11B7/007 , G11B7/013 , G11B7/26 , G11B7/09
CPC分类号： G11B7/005 , G11B7/00718 , G11B7/00745 , G11B7/0901 , G11B7/0938 , G11B7/24 , G11B7/261 , G11B11/10578 , G11B11/10582

6. 发明公开

EP1006520A3 Magneto-optical recording medium 有权
标题翻译：一种磁光记录介质
公开(公告)号：EP1006520A3
公开(公告)日：2001-11-28
申请号：EP99123588.8
申请日：1999-11-26
申请人： SHARP KABUSHIKI KAISHA
发明人： Iketani, Naoyasu , Mori, Go , Mieda, Michinobu , Takahashi, Akira
IPC分类号： G11B11/105
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10584
摘要： In order to provide a magneto-optical recording medium which can select a single recording magnetic domain in the recording layer (4) accurately and expand and transfer the same to the reproducing layer (1), the magneto-optical recording medium is arranged in the following manner. That is, the magnetization direction of the reproducing layer (1) is in-plane at room temperature and shifts to perpendicular at or above a predetermined temperature T trans. . The recording layer (4) is a magnetic layer which is magneto-statically coupled to the reproducing layer (1) and shows the perpendicular magnetization up to its Curie temperature. The magnetic mask layer (3) is provided between the recording layer (4) and reproducing layer (1), and the magnetization thereof is reduced to 0 (zero) at or above a predetermined temperature (T m ) which is at or above T trans. . The magnetization of the magnetic mask layer (3) is larger than that of the recording layer (4) at least in a range between room temperature and T trans. .

7. 发明公开

EP1006520A2 Magneto-optical recording medium 有权
标题翻译：磁光记录介质
公开(公告)号：EP1006520A2
公开(公告)日：2000-06-07
申请号：EP99123588.8
申请日：1999-11-26
申请人： SHARP KABUSHIKI KAISHA
发明人： Iketani, Naoyasu , Mori, Go , Mieda, Michinobu , Takahashi, Akira
IPC分类号： G11B11/10
CPC分类号： G11B11/10586 , G11B11/10515 , G11B11/10584
摘要： In order to provide a magneto-optical recording medium which can select a single recording magnetic domain in the recording layer accurately and expand and transfer the same to the reproducing layer, the magneto-optical recording medium is arranged in the following manner. That is, the magnetization direction of the reproducing layer is in-plane at room temperature and shifts to perpendicular at or above a predetermined temperature T trans. . The recording layer is a magnetic layer which is magneto-statically coupled to the reproducing layer and shows the perpendicular magnetization up to its Curie temperature. The magnetic mask layer is provided between the recording layer and reproducing layer, and the magnetization thereof is reduced to 0 (zero) at or above a predetermined temperature (T m ) which is at or above T trans. . The magnetization of the magnetic mask layer is larger than that of the recording layer at least in a range between room temperature and T trans. .
摘要翻译：为了提供一种能够精确地选择记录层中的单个记录磁畴并将其扩展并传送到再现层的磁光记录介质，以下列方式设置磁光记录介质。也就是说，再现层的磁化方向在室温下是平面内的并且在预定温度Ttrans或以上移动到垂直。记录层是与再现层磁静态耦合的磁性层，并且示出了垂直磁化直至居里温度。在记录层和再现层之间提供磁屏蔽层，并且其磁化在等于或大于Ttrans或更高的预定温度（Tm）或更高时降低到0（零）。磁屏蔽层的磁化为至少在室温和Ttrans之间的范围内比记录层的厚度大。

8. 发明公开

EP0918323A2 Optical disk 审中-公开
标题翻译： Optische普拉特
公开(公告)号：EP0918323A2
公开(公告)日：1999-05-26
申请号：EP98120847.3
申请日：1998-11-03
申请人： Sharp Kabushiki Kaisha
发明人： Mori, Go , Mieda, Michinobu , Iketani, Naoyasu , Suzuki, Ippei , Murakami, Yoshiteru , Takahashi, Akira
IPC分类号： G11B7/24
CPC分类号： G11B7/252 , G11B7/24056 , G11B7/24067 , G11B7/2533 , G11B7/2534 , G11B7/2542 , G11B7/2578 , G11B11/10584 , G11B2007/25706 , G11B2007/25708 , G11B2007/2571 , G11B2007/25713 , G11B2007/25715 , G11B2007/25718
摘要： An optical disk of the present invention includes a transparent dielectric film formed on a light incident side of the disk on an opposite side of an optical recording film so as to sandwich the transparent substrate therebetween, for suppressing bimetallic effects caused by a difference in thermal expansion between an optical recording film formed on an optical recording surface and the transparent substrate, whereby changes in tilt against temperature changes can be suppressed. Further, by an optimal selection of a reflectance of the transparent dielectric film, unwanted reflection due to multi-interference can be reduced at the same time.
摘要翻译：本发明的光盘包括在光记录膜的相反侧的光盘入射侧形成的透明电介质膜，以将透明基板夹在其间，用于抑制由热膨胀差引起的双金属效应在形成在光学记录表面上的光学记录膜与透明基板之间，由此可以抑制倾斜温度变化的变化。此外，通过对透明电介质膜的反射率的最佳选择，可以同时减少由于多次干涉引起的不期望的反射。

9. 发明公开

EP0596716A2 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：一种磁光记录载体，记录和重放方法，以及设计成用于该磁 - 光记录介质的光学头。
公开(公告)号：EP0596716A2
公开(公告)日：1994-05-11
申请号：EP93308777.7
申请日：1993-11-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Murakami, Yoshiteru , Hirokane, Junji , Nakayama, Junichiro , Nakajima, Junsaku , Takahashi, Akira , Ohta, Kenji , Iketani, Naoyasu
IPC分类号： G11B11/10
CPC分类号： G11B7/126 , G11B7/00718 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10584 , G11B11/10586 , G11B11/10595 , Y10S428/90
摘要： A magneto-optical recording medium is composed of a base (1) which has a property that a light can be transmitted therethrough, a readout layer (3) formed on the base, which has in-plane magnetization at room temperature, whereas, a transition occurs from in-plane magnetization to perpendicular magnetization as the temperature thereof is raised and a recording layer (4) formed on the readout layer for recording information magneto-optically. A recording and reproducing method and the optical head are designed for the magneto-optical recording medium. By the recording and reproducing method using the optical head, information recorded at high density can be reproduced.
摘要翻译：一种磁光记录介质由其中有一个属性没有光可以是反式mitted有碱的通过，形成在所述基底上形成读出层，其在室温下具有面内磁化，而，过渡的从面内发生磁化为将其温度升高垂直磁化和形成在读出层上用于磁光记录信息的记录层。一种记录和再现方法和光学头被设计用于磁 - 光记录介质。通过使用光学头的记录和再现方法，以高密度记录信息可以被再现。

10. 发明授权

EP0596716B1 Magneto-optical recording medium and recording and reproducing method and optical head designed for the magneto-optical recording medium 失效
标题翻译：一种磁光记录载体，记录和重放方法，以及设计成用于该磁 - 光记录介质的光学头
公开(公告)号：EP0596716B1
公开(公告)日：2002-05-15
申请号：EP93308777.7
申请日：1993-11-03
申请人： SHARP KABUSHIKI KAISHA
发明人： Murakami, Yoshiteru , Hirokane, Junji , Nakayama, Junichiro , Nakajima, Junsaku , Takahashi, Akira , Ohta, Kenji , Iketani, Naoyasu
IPC分类号： G11B11/10
CPC分类号： G11B7/126 , G11B7/00718 , G11B11/10506 , G11B11/10515 , G11B11/10517 , G11B11/10543 , G11B11/10584 , G11B11/10586 , G11B11/10595 , Y10S428/90

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