公开(公告)号：US06707766B2

公开(公告)日：2004-03-16

申请号：US10099968

申请日：2002-03-19

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B1100

CPC分类号： G11B11/10593 ,  G11B11/10584

摘要： A magneto-optical storage medium includes an interference layer, a magnetic domain expansion layer, an intermediate layer, a magnetic masking layer, a recording layer, and a protection layer which are sequentially formed on a substrate. The magnetic domain expansion layer produces a smaller frictional force due to wall coercivity than do the other magnetic layers. The intermediate layer has the Curie temperature TC2 which is lower than those of the other magnetic layers. The magnetic masking layer is in a perpendicular magnetization state at temperatures that are in a proximity of TC2, and changes into an in-plane magnetization state at temperatures that are higher than the proximity of TC2. The recording layer produces a higher coercive force than those produced by the magnetic domain expansion layer at room temperature.

摘要翻译： 磁光存储介质包括依次形成在基板上的干涉层，磁畴扩展层，中间层，磁屏蔽层，记录层和保护层。 与其它磁性层相比，磁畴扩展层由于壁矫顽力而产生较小的摩擦力。 中间层的居里温度TC2低于其他磁性层的居里温度TC2。 磁屏蔽层在接近TC2的温度下处于垂直磁化状态，并且在高于TC2的接近度的温度下变为面内磁化状态。 记录层产生比在室温下由磁畴扩展层产生的矫顽力更高的矫顽力。

公开(公告)号：US06338911B1

公开(公告)日：2002-01-15

申请号：US09429082

申请日：1999-10-29

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B566

CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10593 ,  Y10S428/90

摘要： A reproduction layer, a magnetic domain extending layer, an intermediate layer, and a recording layer are formed in this order. The magnetic domain extending layer, the intermediate layer, and the recording layer are exchange-coupled. The intermediate layer has a Curie temperature lower than that of any other magnetic layer. A non-magnetic intermediate layer is formed between the reproduction layer and the magnetic domain extending layer. Upon reproduction, magnetization information in the recording layer is transferred to and extended in the magnetic domain extending layer, where an extended magnetic domain is formed. The reproduction layer is magnetostatically coupled with the magnetic domain extending layer, so that the extended magnetic domain is transferred to the reproduction layer. This makes it possible to provide a magneto-optical recording medium characterized in moving of magnetic domain walls and extension of magnetic domains in good conditions, and increased signal intensity with a simpler structure.

摘要翻译： 依次形成再生层，磁畴延伸层，中间层和记录层。 磁畴延伸层，中间层和记录层是交换耦合的。 中间层的居里温度低于任何其他磁性层的居里温度。 在再现层和磁畴延伸层之间形成非磁性中间层。 在再现时，记录层中的磁化信息被转移到扩展磁畴的磁畴延伸层中并扩展。 再现层与磁畴延伸层磁静电耦合，从而将扩展磁畴转移到再现层。 这使得可以提供一种磁光记录介质，其特征在于在良好的条件下磁畴壁的移动和磁畴的延伸，并且以更简单的结构增加信号强度。

公开(公告)号：US06128274A

公开(公告)日：2000-10-03

申请号：US188581

申请日：1998-11-09

申请人： Go Mori ,  Michinobu Mieda ,  Naoyasu Iketani ,  Ippei Suzuki ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Go Mori ,  Michinobu Mieda ,  Naoyasu Iketani ,  Ippei Suzuki ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B7/24 ,  G11B7/241 ,  G11B7/257 ,  G11B11/105

CPC分类号： G11B7/252 ,  G11B7/24056 ,  G11B7/24067 ,  G11B11/10584 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25718 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2542 ,  G11B7/2578

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： 本发明的光盘包括形成在光记录膜的相对侧上的光盘入射侧的透明电介质膜，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，由此能够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。

公开(公告)号：US5982715A

公开(公告)日：1999-11-09

申请号：US116328

申请日：1998-07-15

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Ippei Suzuki ,  Junji Hirokane ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Ippei Suzuki ,  Junji Hirokane ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10584 ,  G11B11/10593 ,  G11B11/10515

摘要： A magneto-optical recording medium with a reproducing layer that exhibits in-plane magnetization at room temperature and that comes to exhibit perpendicular magnetization as temperature rises. The second shielding layer is used to block the magnetization of record bits other than a record bit to be reproduced from being copied on a signal reproducing area in the reproducing layer. Consequently, even in the case of high-density record bits in the recording layer, only the magnetization of the record bit to be reproduced is copied on the reproducing layer. Therefore, the application of the magneto-optical recording medium makes it possible to produce superior reproducing signals even in the case where the records bits with high density are formed on the recording layer.

摘要翻译： 一种具有再现层的磁光记录介质，其在室温下表现出平面内的磁化，并且随着温度升高而呈现垂直磁化强度。 第二屏蔽层用于阻止除被再现的记录位之外的记录位的磁化被复制在再现层中的信号再现区上。 因此，即使在记录层中的高密度记录位的情况下，只有将再现的记录位的磁化复制在再现层上。 因此，即使在记录层上形成具有高密度的记录位的情况下，也可以应用磁光记录介质来产生优良的再现信号。

公开(公告)号：US06477120B1

公开(公告)日：2002-11-05

申请号：US09451260

申请日：1999-11-30

申请人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

发明人： Naoyasu Iketani ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B1100

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 Ttrans.. 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 (Tm) which is at or above Ttrans.. The magnetization of the magnetic mask layer is larger than that of the recording layer at least in a range between room temperature and Ttrans..

摘要翻译： 为了提供可以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，磁光记录介质以如下方式布置。 也就是说，再现层的磁化方向在室温下处于平面，并在预定温度T trans以上移动到垂直方向。记录层是磁性层，磁性层与再现层磁耦合，并显示出 垂直磁化强度达其居里温度。 磁记录层设置在记录层和再现层之间，其磁化强度在等于或高于Ttrans的预定温度（Tm）以上或者高于Ttrans的0（零）。磁屏蔽层的磁化强度为 大于记录层的至少在室温和Ttrans之间的范围内。

公开(公告)号：US06388956B1

公开(公告)日：2002-05-14

申请号：US09440929

申请日：1999-11-16

申请人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

发明人： Go Mori ,  Naoyasu Iketani ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B1100

CPC分类号： G11B11/10593 ,  G11B11/10584

摘要： A magneto-optical storage medium includes an interference layer, a magnetic domain expansion layer, an intermediate layer, a magnetic masking layer, a recording layer, and a protection layer which are sequentially formed on a substrate. The magnetic domain expansion layer produces a smaller frictional force due to wall coercivity than do the other magnetic layers. The intermediate layer has the Curie temperature TC2 which is lower than those of the other magnetic layers. The magnetic masking layer is in a perpendicular magnetization state at temperatures that are in a proximity of TC2, and changes into an in-plane magnetization state at temperatures that are higher than the proximity of TC2. The recording layer produces a higher coercive force than those produced by the magnetic domain expansion layer at room temperature.

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。

公开(公告)号：US06272077B1

公开(公告)日：2001-08-07

申请号：US09479256

申请日：2000-01-07

申请人： Akira Takahashi ,  Michinobu Mieda ,  Naoyasu Iketani ,  Go Mori ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

发明人： Akira Takahashi ,  Michinobu Mieda ,  Naoyasu Iketani ,  Go Mori ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

IPC分类号： G11B1110

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，居里温度在上述预定温度。 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屏蔽，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中 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。

公开(公告)号：US06147939A

公开(公告)日：2000-11-14

申请号：US32985

申请日：1998-03-02

申请人： Akira Takahashi ,  Michinobu Mieda ,  Naoyasu Iketani ,  Go Mori ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

发明人： Akira Takahashi ,  Michinobu Mieda ,  Naoyasu Iketani ,  Go Mori ,  Junsaku Nakajima ,  Yoshiteru Murakami ,  Junji Hirokane

IPC分类号： G11B11/105 ,  G11B11/00

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，居里温度在上述预定温度。 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屏蔽，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中 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。

公开(公告)号：US6010780A

公开(公告)日：2000-01-04

申请号：US986994

申请日：1997-12-08

申请人： Junichiro Nakayama ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

发明人： Junichiro Nakayama ,  Go Mori ,  Michinobu Mieda ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10586 ,  G11B11/10584 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical memory medium is provided, on a substrate, with a first magnetic layer, which shows in-plane magnetization at room temperature and perpendicular magnetization above a certain temperature, and a second magnetic layer, which shows perpendicular magnetization within a range from room temperature up to its Curie temperature. The first magnetic layer is made up of alternating films of rare earth metals and transition metals. As a result, a magneto-optical memory medium can be provided which has a wide reproducing power margin, and which is able to prevent deterioration of characteristics due to repeated laser projection.

摘要翻译： 在基板上提供磁光存储介质，其具有第一磁性层，该第一磁性层在室温下显示出平面内的磁化强度和高于某一温度的垂直磁化强度;以及第二磁性层，其在 室温达到其居里温度。 第一磁性层由稀土金属和过渡金属的交替膜组成。 结果，可以提供具有宽的再现功率余量的磁光存储介质，并且能够防止由于重复的激光投影引起的特性的劣化。