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41.发明授权
公开(公告)号：US5777953A
公开(公告)日：1998-07-07
申请号：US769254
申请日：1996-12-18
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
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 5 nm to 30 nm, the second transparent dielectric layer has a thickness of 6 nm to 40 nm, and the recording layer has a thickness of 20 nm to 80 nm. 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强度，（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，第二透明电介质层的厚度为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记录位，也可以分别再现单个记录位。 这是因为屏蔽显示面内磁化的部分的记录磁畴的信息。
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公开(公告)号：US5595805A
公开(公告)日：1997-01-21
申请号：US318536
申请日：1994-10-05
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10584 , G11B11/10586 , Y10S428/90
摘要： A magneto-optical medium has a substrate through which a light beam is transmitted and a recording-reproduction layer. The recording-reproduction layer, which exhibits an in-plane magnetization characteristic at the first temperature while still containing magnetization components in the perpendicular direction corresponding to information, comes to exhibit a perpendicular magnetization characteristic above the second temperature higher than the first temperature. In this magneto-optical recording medium, information is reproduced by utilizing a temperature distribution of the recording-reproduction layer being subjected to irradiation of a light beam and by raising the temperature of a portion within a light spot of the light beam from the first temperature to the second temperature.
摘要翻译： 磁光介质具有透射光束的基板和记录再生层。 在与信息对应的垂直方向上仍然含有磁化成分的情况下，在第一温度下表现出面内磁化特性的记录再现层在高于第一温度的第二温度以上呈现垂直磁化特性。 在该磁光记录介质中，通过利用经受光束照射的记录再生层的温度分布，并且通过将来自第一温度的光束的光斑内的部分的温度升高来再现信息 到第二个温度。
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公开(公告)号：US5427833A
公开(公告)日：1995-06-27
申请号：US175957
申请日：1993-12-30
CPC分类号： G11B5/6005 , G11B11/1058 , G11B11/10584 , Y10S428/90 , Y10S428/928 , Y10T428/218 , Y10T428/24355 , Y10T428/31935
摘要： A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.
摘要翻译： 本发明的磁光记录介质的表面具有精细和物理的突出和凹陷的纹理。 物理突起和凹陷的形状在介质上的每个径向位置处变化，使得例如在记录介质的内部形成粗糙的突起和凹陷，并且在其外部形成微小的突起和凹陷。 因此，通过外部部分中的空气层，基于恒定的角速度法，从介质旋转的浮动浮动力等于内部部分的浮力。 因此，由于浮动头的浮动高度与介质上的径向位置无关地变得恒定，所以可以在恒定的记录条件下记录信息，从而可以提高记录的准确性。 关于本发明的磁光记录介质的表面的处理方法，例如，在粗糙度小的纹理带用于外部的粗糙度较小的纹理带时，粗糙度大的纹理带用于介质的内部， 其部分。 结果，产生具有上述特性的磁光记录介质。
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公开(公告)号：US5328740A
公开(公告)日：1994-07-12
申请号：US650283
申请日：1991-02-04
IPC分类号： G11B11/10 , B29C59/02 , B29L17/00 , G11B5/60 , G11B7/26 , G11B11/105 , B32B3/02 , B32B3/10 , G11B5/66
CPC分类号： G11B5/6005 , G11B11/1058 , G11B11/10584 , Y10S428/90 , Y10S428/928 , Y10T428/218 , Y10T428/24355 , Y10T428/31935
摘要： A surface of a magneto-optical recording medium of the present invention is textured with fine and physical protrusions and recessions. The shapes of physical protrusions and recessions vary at each radial locations on the medium such that, for example, rough protrusions and recessions are formed in inner parts of the recording medium and fine protrusions and recessions are formed in outer parts thereof. Therefore, floating force given to a floating head from the medium being rotated based on the constant angular velocity method through an air layer in the outer parts equals floating force in the inner parts. Consequently, since the floating height of the floating head becomes constant irrespective of radial locations on the medium, information can be recorded under constant recording conditions, permitting the accuracy of the recording to improve. Regarding a method for processing the surface of a magneto-optical recording medium relating to the present invention, for example, a texture tape whose roughness is large is used in inner parts of the medium while a texture tape whose roughness is small is used in outer parts thereof. As a result, a magneto-optical recording medium having the above characteristics is produced.
摘要翻译： 本发明的磁光记录介质的表面具有精细和物理的突出和凹陷的纹理。 物理突起和凹陷的形状在介质上的每个径向位置处变化，使得例如在记录介质的内部形成粗糙的突起和凹陷，并且在其外部形成微小的突起和凹陷。 因此，通过外部部分中的空气层，基于恒定的角速度法，从介质旋转的浮动浮动力等于内部部分的浮力。 因此，由于浮动头的浮动高度与介质上的径向位置无关地变得恒定，所以可以在恒定的记录条件下记录信息，从而可以提高记录的准确性。 关于本发明的磁光记录介质的表面的处理方法，例如，在粗糙度小的纹理带用于外部的粗糙度较小的纹理带时，粗糙度大的纹理带用于介质的内部， 其部分。 结果，产生具有上述特性的磁光记录介质。
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公开(公告)号：US5082690A
公开(公告)日：1992-01-21
申请号：US523756
申请日：1990-05-15
IPC分类号： G11B11/10 , F26B13/10 , G11B11/105
CPC分类号： F26B13/103 , G11B11/10584
摘要： The present invention provides a process for manufacturing a magneto-optic disc comprising at least a transparent substrate, a magneto-optic recording film, and a protecting film made of resin for protecting the magneto-optic recording film, comprising the steps of forming the magneto-optic recording film over the entire one side surface of the transparent substrate; providing in a portion adjacent to the peripheral edge of the magneto-optic recording film an annular groove extending in depth through the magneto-optic recording film to the transparent substrate; and forming the protecting film over the surfaces of the magneto-optic recording film and the annular groove.
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公开(公告)号：US5490131A
公开(公告)日：1996-02-06
申请号：US731790
申请日：1991-07-18
申请人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
发明人： Kenji Ohta , Toshikazu Nagaura , Masayasu Futagawa , Shinji Yamagami , Yoshiteru Murakami , Hiroyuki Ikenaga , Michinobu Mieda , Tetsuya Inui , Akira Takahashi
IPC分类号： G11B7/24 , G11B7/243 , G11B7/253 , G11B7/2534 , G11B7/2542 , G11B7/257 , G11B7/258 , G11B7/2585 , G11B7/26 , G11B11/105 , G11B11/12
CPC分类号： G11B7/2542 , G11B11/10586 , G11B7/24 , G11B7/252 , G11B7/26 , G11B2007/24306 , G11B2007/25708 , G11B2007/25713 , G11B7/2534 , G11B7/2585
摘要： An optical disk including a transparent plastic substrate, a recording film formed on an one side surface of said substrate, a first protective film covering said recording film, and a moisture-impermeable film formed on the other side surface of said substrate via or not via an intermediate film.
摘要翻译： 一种光盘，包括透明塑料基板，形成在所述基板的一个侧表面上的记录膜，覆盖所述记录膜的第一保护膜和形成在所述基板的另一侧表面上的不透湿膜，经由或不经由 中间膜。
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47.发明授权Magneto-optic reproducing device using right and left circularly polarized light 失效使用右侧和左侧圆形偏振光的磁光复制装置
公开(公告)号：US5202860A
公开(公告)日：1993-04-13
申请号：US664183
申请日：1991-03-04
IPC分类号： G11B11/105
CPC分类号： G11B11/10545
摘要： A reproducing optical device for a magneto-optical recording medium related to the present invention having light sources that emit linearly polarized lights towards a magneto-optical recording medium, polarization directions of the linearly polarized lights being mutually orthogonal. A quarter wavelength plate disposed between the recording medium and the light sources converts each of the linearly polarized lights into right and left circularly polarized lights respectively. Corresponding to recorded information, the recording medium has magnetized sections that are magnetized in a perpendicularly upward and downward direction with respect to a medium surface. Moreover, the recording medium displays the property of circular dichroism. When the right circularly polarized light and the left circularly polarized light are reflected off the recording medium, a first and a second photodetector generate a first and a second reproduced signal respectively, based on variation in reflected light intensity of each of the circularly polarized lights. This variation corresponds to the upward and the downward magnetization directions of the magnetized sections and is due to the circular dichroism effect. There is a phase difference of half a cycle between the first and the second reproduced signal and the signals vary inversely with respect to each other. Consequently, disk noise is cancelled by differentially amplifying the first and the second reproduced signal, and an SN ratio of a reproduced signal thereby can be improved.
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公开(公告)号：US6001467A
公开(公告)日：1999-12-14
申请号：US13987
申请日：1993-02-05
IPC分类号： G11B11/105 , G11B5/66
CPC分类号： G11B11/10586 , G11B11/10584 , Y10S428/90 , Y10T428/265
摘要： A magneto-optic memory medium comprising a dielectric film, a magneto-optic memory film, a dielectric film and a reflective film superposed in layers on a light trnasmitting substrate, the magneto-optic memory film being a rare earth-transition metal alloy film having the composition formula of:(Gd.sub.x Tb.sub.1-x).sub.y Fe.sub.1-ywherein x is 0.58 to 0.62, and y is 0.27 to 0.33, which is useful as a magneto-optic disc or magneto-optic card.
摘要翻译： 一种磁光存储介质，包括介电膜，磁光存储膜，电介质膜和叠层在光透射基底上的反射膜，所述磁光存储膜是稀土过渡金属合金膜，其具有 （GdxTb1-x）yFe1-y的组成式：x为0.58〜0.62，y为0.27〜0.33，可用作磁光盘或磁光卡。
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公开(公告)号：US5586109A
公开(公告)日：1996-12-17
申请号：US354457
申请日：1994-12-12
IPC分类号： G11B7/0045 , G11B7/007 , G11B7/09 , G11B7/24 , G11B7/26 , G11B11/105 , G11B3/70
CPC分类号： G11B7/261 , G11B11/10582 , G11B7/24 , G11B7/24079 , G11B7/26 , G11B7/00454 , G11B7/007 , G11B7/0938
摘要： A transparent substrate of an optical memory is produced by injection molding using a stamper. Grooves and lands are alternately arranged on the optical memory, for tracking of light converged on the optical memory. The groove width is set in the range of 0.3 .mu.m to 0.4 .mu.m and the groove depth is set in the rage of 80 nm to 100 nm. A decrease in the width of a land at each edge is restrained to 0.2 .mu.m in maximum. With such dimensions, even when the track pitch is set to about 1.4 .mu.m, it is possible to obtain a track crossing signal with intensity sufficient for performing an access operation to a target track. Moreover, since the dimensions bring about an improved reflectance at a land, the optical memory achieves an improved C/N and recording density.
摘要翻译： 通过使用压模的注射成型制造光学存储器的透明基板。 沟槽和焊盘交替布置在光学存储器上，用于跟踪会聚在光学存储器上的光。 槽宽度设定在0.3μm〜0.4μm的范围内，槽深度设定在80nm〜100nm的范围内。 每个边缘的陆地宽度减小最大限制在0.2亩。 利用这样的尺寸，即使当轨道间距设置为大约1.4μm时，也可以获得具有足以对目标轨道进行访问操作的强度的轨迹交叉信号。 此外，由于尺寸在陆地上产生改进的反射率，所以光学存储器实现了改进的C / N和记录密度。
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50.发明授权
公开(公告)号：US5331612A
公开(公告)日：1994-07-19
申请号：US922854
申请日：1992-07-31
申请人： Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
发明人： Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
IPC分类号： G11B5/02 , G11B11/10 , G11B11/105 , G11B13/04
CPC分类号： G11B11/10521 , G11B11/10508 , G11B11/1051 , G11B11/10528 , G11B11/1053 , G11B11/10595
摘要： A magneto-optical recording apparatus which records information through the processes of: first irradiating a light beam onto a magneto-optical recording medium having a recording film; and next applying an external magnetic field that is inverted in response to a recording signal onto the recording film while continuing the first process. In the above arrangement, the intensity of the light beam is dropped upon inversion of the external magnetic field so that information is not recorded. The intensity of the light beam is raised during non-inversion of the external magnetic field so that information is recorded. Further the magneto-optical recording apparatus is provided with a light intensity control device for varying the intensity of the light beam dependent of the lengths of recording bits so that the high-temperature area of the recording film is not widened. Since the width of the recording bits is uniformly maintained, the remaining of the recording bit after overwriting operation can be reduced; thus, the signal quality in reproduction can be enhanced.
摘要翻译： 一种磁光记录装置，其通过以下处理记录信息：首先将光束照射到具有记录膜的磁光记录介质上; 并且接着在继续进行第一处理的同时将响应于记录信号反转的外部磁场施加到记录膜上。 在上述布置中，光束的强度在外部磁场反转时下降，从而不记录信息。 在外部磁场的非反相期间，光束的强度升高，从而记录信息。 此外，磁光记录装置设置有光强度控制装置，用于根据记录位的长度改变光束的强度，使得记录膜的高温区域不会变宽。 由于记录位的宽度被均匀地保持，所以可以减少重写操作之后的记录位的剩余部分。 因此，可以提高再现中的信号质量。
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