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91. 发明授权

US5955191A Magneto-optical recording medium and a reproducing method using such a medium 失效
标题翻译：磁光记录介质和使用这种介质的再现方法
公开(公告)号：US5955191A
公开(公告)日：1999-09-21
申请号：US898270
申请日：1997-07-22
申请人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
发明人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10593 , G11B11/10515 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A super-resolution magneto-optical recording medium has a reproducing layer, an in-plane magnetization layer and a recording layer. The reproducing layer and the recording layer are magnetostatically coupled, and each of the layers is made of a rare-earth transition-metal alloy which has a greater transition-metal sublattice moment than the compensation composition, and exhibits perpendicular magnetization, if it exists alone. At a temperature not more than the Curie temperature, the in-plane magnetization layer is exchange-coupled with the reproducing layer so as to allow the reproducing layer to exhibit in-plane magnetization. Since the reproducing layer is allowed to exhibit in-plane magnetization by the in-plane magnetization layer, it is not necessary to use a material containing a greater rare-earth metal sublattice moment as the reproducing layer. Therefore, at portions in the in-plane magnetization layer having temperatures higher than the Curie temperature, the directions of the transition-metal sublattice moments of the reproducing layer and the recording layer are aligned in parallel with each other. Thus, the reproducing polarity of this medium becomes the same as the polarity of a magneto-optical recording medium without a reproducing layer, thereby allowing compatibility with each other.
摘要翻译：超分辨率磁光记录介质具有再现层，平面内磁化层和记录层。再现层和记录层是静磁耦合的，并且每个层由稀土过渡金属合金制成，其具有比补偿组合物更大的过渡金属亚晶格力矩，并且如果单独存在则呈现垂直磁化。在不高于居里温度的温度下，面内磁化层与再生层交换耦合，以使再现层呈现面内磁化。由于通过面内磁化层允许再现层表现出平面内的磁化，因此不需要使用含有较大稀土金属亚晶格力矩的材料作为再生层。因此，在具有高于居里温度的面内的磁化层的部分，再现层和记录层的过渡金属亚晶格矩的方向彼此平行排列。因此，该介质的再现极性与没有再现层的磁光记录介质的极性相同，从而允许彼此兼容。

92. 发明授权

US5936916A Magneto-optical recording medium with multiple magnetic layers and methods related thereto 失效
标题翻译：具有多个磁性层的磁光记录介质及其相关方法
公开(公告)号：US5936916A
公开(公告)日：1999-08-10
申请号：US18267
申请日：1998-02-04
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 , G11B5/66
CPC分类号： G11B11/10584 , G11B11/10519 , G11B11/10586 , G11B11/10506
摘要： If the Curie points of the first magnetic layer, second magnetic layer, third magnetic layer and fourth magnetic layer of alloys of rare-earth metal and transition metal as ferrimagnetic materials showing perpendicular magnetization from room temperature to their Curie points are indicated as Tc1, Tc2, Tc3 and Tc4, respectively, the Curie points and room temperature are related by: room temperature
摘要翻译：如果作为铁氧体材料的稀土金属和过渡金属的合金的第一磁性层，第二磁性层，第三磁性层和第四磁性层的居里点显示出从室温到居里点的垂直磁化率，表示为Tc1，Tc2 ，Tc3和Tc4，居里点和室温分别与室温

93. 发明授权

US5926444A Magneto-optical recording medium for achieving super resolution reproduction of high resolution recorded information 失效
标题翻译：用于实现高分辨率记录信息的超分辨率再现的磁光记录介质
公开(公告)号：US5926444A
公开(公告)日：1999-07-20
申请号：US892922
申请日：1997-07-15
申请人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
发明人： Junji Hirokane , Yoshiteru Murakami , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10584 , G11B11/10586
摘要： A magneto-optical recording medium of the present invention has a recording layer made of a perpendicular magnetization film, and a readout layer which is in an in-plane magnetization state at room temperature and changes into a perpendicular magnetization state with a rise in temperature. When the magneto-optical recording medium is irradiated with a light beam, the readout layer separates into three regions: a region in an in-plane magnetization state, a region in a perpendicular magnetization state, and a region having a temperature not lower than the Curie temperature thereof. Only the region in the perpendicular magnetization state allows copying of the magnetization of the recording layer. Therefore, even when the diameter and intervals of recording bits on the recording layer are very small, it is possible to reproduce a target recording bit separately from a recording bit adjacent to the target recording bit.
摘要翻译：本发明的磁光记录介质具有由垂直磁化膜构成的记录层和在室温下处于面内磁化状态的读出层，随温度升高而变为垂直磁化状态。当磁光记录介质被光束照射时，读出层分为三个区域：面内磁化状态的区域，垂直磁化状态的区域和温度不低于居里温度。只有垂直磁化状态的区域才允许复制记录层的磁化。因此，即使当记录层上的记录位的直径和间隔非常小时，也可以与目标记录位相邻的记录位分开再现目标记录位。

94. 发明授权

US5901118A Magneto-optical recording medium having a readout layer and a recording layer 失效
标题翻译：具有读出层和记录层的磁光记录介质
公开(公告)号：US5901118A
公开(公告)日：1999-05-04
申请号：US803168
申请日：1997-02-19
申请人： Naoyasu Iketani , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
发明人： Naoyasu Iketani , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586 , G11B11/10584 , G11B11/10515
摘要： A magneto-optical recording medium having a substrate whereupon a transparent dielectric layer, a readout layer showing in-plane magnetization at room temperature and perpendicular magnetization with an increase in temperature, a metal film layer, a recording layer made of a perpendicularly magnetized film, and a protective layer are formed in this order, wherein the film thickness of the readout layer is between 5 nm and 30 nm, the film thickness of the metal film layer is between 6 nm and 40 nm, and the film thickness of the recording layer is between 20 nm and 80 nm. Since recording domain information at a portion showing in-plane magnetization is masked, even when adjacent recording bit enters into the beam diameter of a light beam focused, it is possible to separately reproduce individual recording bits with high signal quality.
摘要翻译：具有基板的磁光记录介质，其中透明介电层，在室温下显示出面内磁化的读出层和随温度升高的垂直磁化，金属膜层，垂直磁化膜制成的记录层，并且依次形成保护层，其中读出层的膜厚度在5nm和30nm之间，金属膜层的膜厚度在6nm和40nm之间，记录层的膜厚度在20nm和80nm之间。由于在显示面内磁化的部分记录域信息被掩蔽，所以即使当相邻的记录位进入聚焦的光束的光束直径时，也可以分离再现具有高信号质量的各个记录位。

95. 发明授权

US5633838A Magneto-optical recording medium having two reproduction layers and a method for reproducing thereof 失效
标题翻译：具有两个再现层的磁光记录介质及其再现方法
公开(公告)号：US5633838A
公开(公告)日：1997-05-27
申请号：US582481
申请日：1996-01-03
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 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A non-magnetic intermediate layer is provided between a reproductive layer and a recording layer. The reproductive layer is composed of a first reproductive layer and a second reproductive layer. When the first reproductive layer has a temperature that is higher than a first critical temperature, its stable magnetic domain width becomes smaller than a recording magnetic domain width so that the magnetization is reversed. When the second reproductive layer has a temperature that is higher than a second critical temperature, its stable magnetic domain width becomes larger than the recording magnetic domain width so that the reversed magnetic domain is collapsed. The first critical temperature is lower than the second critical temperature. A reproductive output having abrupt rising and falling can be obtained by the generation and the collapse of the reverse magnetic domain on the reproductive layer. For this reason, higher density recording required for larger capacity can be achieved.
摘要翻译：在生殖层和记录层之间设置非磁性中间层。生殖层由第一生殖层和第二生殖层组成。当第一生殖层具有高于第一临界温度的温度时，其稳定的磁畴宽度变得小于记录磁畴宽度，使得磁化反转。当第二生殖层具有高于第二临界温度的温度时，其稳定的磁畴宽度变得大于记录磁畴宽度，使得反向磁畴被折叠。第一临界温度低于第二临界温度。具有突然上升和下降的生殖输出可以通过生殖层上的反向磁畴的产生和崩溃获得。为此，可以实现更大容量所需的更高密度的记录。

96. 发明授权

US06295271B1 Optical recording medium having tracks, each track having a plurality of wobble sections/one-side wobble regions 失效
标题翻译：具有轨道的光记录介质，每个轨道具有多个摆动部分/一侧摆动区域
公开(公告)号：US06295271B1
公开(公告)日：2001-09-25
申请号：US09475414
申请日：1999-12-30
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
IPC分类号： G11B724
CPC分类号： G11B7/005 , G11B7/00718 , G11B7/00745 , G11B7/0901 , G11B7/0938 , G11B7/24 , G11B7/261 , G11B11/10578 , G11B11/10582
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。

97. 发明授权

US06122233A Optical disk having virtually constant width recording track and optical disk apparatus 失效
标题翻译：具有实际上恒定宽度的记录轨道和光盘装置的光盘
公开(公告)号：US06122233A
公开(公告)日：2000-09-19
申请号：US15011
申请日：1998-01-28
申请人： Naoyasu Iketani , Go Mori , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
发明人： Naoyasu Iketani , Go Mori , Michinobu Mieda , Yoshiteru Murakami , Junji Hirokane , Akira Takahashi
IPC分类号： G11B7/24 , G11B7/00 , G11B7/005 , G11B7/007 , G11B11/105 , G11B7/09
CPC分类号： G11B7/00745 , G11B11/10563 , G11B11/10565 , G11B7/00718
摘要： In an optical disk, grooves and lands serving as recording tracks are provided, the grooves are shaped so as to have virtually the same width, and in a first region, the two side walls of each groove wind in accordance with address information. The first region of the groove is formed with its leading portion located at the same angular position as the leading portion of at least one of the first regions of the adjacent grooves. Moreover, the winding portions corresponding to respective bits of the address information are formed in a manner so as to synchronize to the adjacent grooves. With this arrangement, it becomes possible to easily detect address information from the grooves and lands, and consequently to obtain an information reproducing signal with high quality.
摘要翻译：在光盘中，设置有用作记录轨迹的凹槽和凹槽，这些凹槽成形为具有实质上相同的宽度，并且在第一区域中，每个凹槽的两个侧壁根据地址信息而变风。凹槽的第一区域形成有其前端部分位于与相邻凹槽的第一区域中的至少一个的前端部分相同的角位置。此外，与地址信息的各个位对应的绕组部分以与相邻槽同步的方式形成。利用这种布置，可以容易地从凹槽和平台检测地址信息，从而获得高质量的信息再现信号。

98. 发明授权

US6042954A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US6042954A
公开(公告)日：2000-03-28
申请号：US844270
申请日：1997-04-18
申请人： Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi
发明人： Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , Y10S428/90
摘要： An magneto-optical recording medium includes: a transparent dielectric layer; a reproduction layer 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; a recording layer made of a perpendicularly magnetized film; and a protection layer, 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：磁光记录介质包括：透明介质层; 在室温下处于面内磁化状态并随着温度升高而变成垂直磁化状态的再生层; 非磁性中间层; 由垂直磁化膜制成的记录层; 和保护层，这些层依次依次形成。记录层由稀土和过渡金属合金制成，稀土金属由含有Gd的两种以上的稀土金属元素组成。存储在磁记录领域中的信息相对于处于平面内磁化状态的部分被掩蔽。因此，可以用较不强大的激光束执行记录，并且即使会聚光束覆盖其半径内的相邻记录位，也可以独立地再现每个记录位以产生高质量信号。

99. 发明授权

US5989705A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5989705A
公开(公告)日：1999-11-23
申请号：US748892
申请日：1996-11-14
申请人： Junsaku Nakajima , Yoshiteru Murakami , Akira Takahashi , Junji Hirokane
发明人： Junsaku Nakajima , Yoshiteru Murakami , Akira Takahashi , Junji Hirokane
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10593 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording disk includes a recording layer for recording information as a mark and a reproduction layer, laminated with the recording layer, to which magnetization direction of the recording layer is transferred at high temperatures, wherein the reproduction layer and the recording layer are magnetostatically coupled and are not exchange-coupled. The information is read out by using a temperature distribution generated by a light beam for reproduction. The recording layer has, on a side thereof to which the reproduction layer is not provided, a supplementary back layer of a soft magnetic material composed of ferromagnetic material. The magneto-optical disk is designed to generate good CNR and thereby improves recording density even when a short mark is reproduced.
摘要翻译：磁光记录盘包括用于记录作为标记的信息的记录层和与记录层层叠的记录层，记录层的高度方向在高温下被转印，其中再现层和记录层是磁静态耦合并且不交换耦合。通过使用由光束产生的温度分布来再现信息来读出信息。记录层在其不具有再现层的一侧具有由铁磁材料构成的软磁性材料的补充背层。磁光盘被设计成产生良好的CNR，从而即使在再现短标记时也提高记录密度。

100. 发明授权

US5939187A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5939187A
公开(公告)日：1999-08-17
申请号：US859614
申请日：1997-05-20
申请人： Junji Hirokane , Junichiro Nakayama , Akira Takahashi
发明人： Junji Hirokane , Junichiro Nakayama , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A magneto-optical recording medium includes a reproducing layer 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 made of a perpendicular magnetization film for recording information, an intermediate layer made of a non-magnetic film formed between the reproducing layer and the recording layer, and an in-plane magnetization layer 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：磁光记录介质包括在室温下具有面内磁化并且在不低于临界温度的升高的温度下具有垂直磁化的再现层，由用于记录信息的垂直磁化膜制成的记录层，中间层由形成在再现层和记录层之间的非磁性膜制成的层以及与再现层相邻的面内磁化层，其中磁化在临界温度附近的温度下降低。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点的直径的情况下，可以分别再现每个记录位，从而获得质量再现信号。

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