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41. 发明授权

US5777953A Arrangement of magneto-optical recording medium which capable of reproducing an individual bit 失效
标题翻译：能够再现单个位的磁光记录介质的布置
公开(公告)号：US5777953A
公开(公告)日：1998-07-07
申请号：US769254
申请日：1996-12-18
申请人： Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
发明人： Junji Hirokane , Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
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。

42. 发明授权

US5656385A Magnetic recording medium and information recording-reproduction method using the same 失效
标题翻译：磁记录介质和使用该磁记录介质的信息记录再现方法
公开(公告)号：US5656385A
公开(公告)日：1997-08-12
申请号：US88608
申请日：1993-07-07
申请人： Junsaku Nakajima , Akira Takahashi , Junji Hirokane , Yoshiteru Murakami , Kenji Ohta
发明人： Junsaku Nakajima , Akira Takahashi , Junji Hirokane , Yoshiteru Murakami , Kenji Ohta
IPC分类号： G11B11/10 , G03G5/16 , G11B5/00 , G11B5/02 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/74 , G11B11/105 , G11B13/04 , G11B19/02
CPC分类号： G03G5/16 , G11B11/10589 , G11B13/045 , G11B5/00 , G11B5/656 , G11B11/10504 , G11B11/10515 , G11B11/10532 , G11B19/02 , G11B2005/0002 , G11B2005/0021 , G11B5/74 , Y10S428/90
摘要： A magnetic recording medium having a recording layer made up of a ferrimagnetic material whose compensation temperature is included within room temperatures and an information recording-reproduction method using the magnetic recording medium. During recording, while a light beam is projected on the recording layer so as to raise the temperature of a recording portion, information is recorded by applying a signal magnetic field from a magnetic head. During reproduction, while a light beam is projected on a reproducing portion of the recording layer so as to raise the temperature thereof, information is reproduced by detecting leakage flux from the reproducing portion by the magnetic head. Thus, during reproduction, no magnetic flux is generated from other portions of the recording layer not irradiated by the light beam. With the arrangement, crosstalk due to leakage flux from adjoining tracks not irradiated by the optical beam can be eliminated. Therefore, track pitches can be made narrower so as to increase recording density of the magnetic recording medium. Further, since crosstalk from adjoining tracks is eliminated, a high S/N can be achieved.
摘要翻译：一种磁记录介质，其具有由补偿温度包括在室温内的铁氧体材料制成的记录层和使用该磁记录介质的信息记录再现方法。在记录期间，当光束投射在记录层上以提高记录部分的温度时，通过施加来自磁头的信号磁场来记录信息。在再现期间，当光束投射在记录层的再现部分上以升高其温度时，通过由磁头检测来自再现部分的漏磁通来再现信息。因此，在再现期间，不会由不被光束照射的记录层的其它部分产生磁通量。利用该布置，可以消除由于未被光束照射的相邻轨道的漏磁通引起的串扰。因此，可以使轨道间距更窄，以提高磁记录介质的记录密度。此外，由于消除了来自相邻轨道的串扰，可以实现高S / N。

43. 发明授权

US5631096A Magneto optical memory device 失效
标题翻译：磁光存储器件
公开(公告)号：US5631096A
公开(公告)日：1997-05-20
申请号：US400464
申请日：1995-03-07
申请人： Junsaku Nakajima , Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
发明人： Junsaku Nakajima , Yoshiteru Murakami , Kenji Ohta , Akira Takahashi
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10508 , G11B11/10515 , G11B11/10586 , G11B11/10521 , Y10S428/90
摘要： A magneto-optical memory device is provided with a base whereon a first magnetic film which exhibits in-plane magnetization at room temperature and exhibits perpendicular magnetization at above room temperature, a second magnetic film having its Curie temperature above room temperature; and a third magnetic film having its Curie temperature set above the Curie temperature of the second magnetic film, which exhibits perpendicular magnetization in a temperature range between room temperature and Curie temperature are laminated in this order. When recording, the temperature of the third magnetic film is raised to the vicinity of its Curie temperature, and information is recorded thereon by an external magnetic field. As the magnetization of the second magnetic film having a temperature rise above its Curie temperature disappears, an exchange coupling force is not exerted between the first magnetic film and the third magnetic film. In the above arrangement, since the effect from the magnetization of the first magnetic film can be avoided, information can be recorded on the third magnetic film by a small external magnetic field, thereby permitting a reduction in electric power consumption and in the size of the apparatus.
摘要翻译：磁光存储器件设置有第一磁性膜的基底，第一磁性膜在室温下表现出平面内的磁化强度，并且在室温以上表现出垂直的磁化强度，第二磁性膜的居里温度高于室温; 并且将其居里温度设定在高于室温和居里温度之间的温度范围内的垂直磁化强度的第二磁性膜的居里温度的第三磁性膜依次层叠。当记录时，第三磁性膜的温度升高到其居里温度附近，并且通过外部磁场在其上记录信息。随着具有高于其居里温度的温度升高的第二磁性膜的磁化消失，在第一磁性膜和第三磁性膜之间不产生交换耦合力。在上述结构中，由于可以避免第一磁性膜的磁化的影响，所以可以通过小的外部磁场将信息记录在第三磁性膜上，从而能够降低电力消耗和仪器。

44. 发明授权

US5962126A Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer 失效
标题翻译：用于从具有读出层，转印层和记录层的磁光记录介质再现数据的方法和装置
公开(公告)号：US5962126A
公开(公告)日：1999-10-05
申请号：US975517
申请日：1997-11-20
申请人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
发明人： Michinobu Mieda , Hiroyuki Katayama , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/10 , G11B11/105 , G11B5/66
CPC分类号： G11B11/10515 , G11B11/10586 , Y10S428/90 , Y10T428/26
摘要： The invention features an apparatus and method for reproducing recorded bits from a magneto-optical recording medium. The medium includes a base, a readout layer formed on the base, a transfer layer formed on the readout layer and a recording layer formed on the transfer layer. The readout and recording layers each exhibit perpendicular magnetization in a temperature range between room temperature and, respectively, the readout layer's Curie temperature and the recording layer's Curie temperature. The transfer layer is predominant in-plane magnetization at room temperature and an in-plane to perpendicular magnetization transition occurs at a temperature above room temperature. Also, the recording layer Curie temperature is lower than the Curie temperature of the transfer layer. The reproducing method includes the steps of projecting a light beam, applying a subsidiary magnetic field and reproducing information based on reflected light from the readout layer while applying the subsidiary magnetic field. The light beam is projected onto the readout layer from the side of the base so the in-plane to perpendicular magnetization transition occurs in a portion of the transfer layer, the portion corresponding to a central portion of the light beam spot. The intensity of the subsidiary magnetic field is higher than the coercive force of the readout layer and less than the exchange coupling force exerted from the recording-layer and the transfer layer to the readout layer.
摘要翻译：本发明的特征在于一种用于从磁光记录介质再现记录位的装置和方法。介质包括基底，形成在基底上的读出层，形成在读出层上的转印层和形成在转印层上的记录层。读出和记录层各自在室温和读出层的居里温度和记录层的居里温度之间的温度范围内呈现垂直磁化强度。转移层在室温下是主要的面内磁化，并且在高于室温的温度下发生面内到垂直磁化转变。此外，记录层居里温度低于转印层的居里温度。再现方法包括以下步骤：投射光束，施加辅助磁场，并且在施加辅助磁场的同时基于来自读出层的反射光再现信息。光束从基底侧投射到读出层上，因此在转移层的一部分中发生垂直磁化转变，该部分对应于光束点的中心部分。辅助磁场的强度高于读出层的矫顽力，并且小于从记录层和转印层施加到读出层的交换耦合力。

45. 发明授权

US5335220A Optical recording element and driving system 失效
标题翻译：光学记录元件和驱动系统
公开(公告)号：US5335220A
公开(公告)日：1994-08-02
申请号：US821361
申请日：1992-01-16
申请人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
发明人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
IPC分类号： G11B7/0045 , G11B7/013 , G11B7/09 , G11B7/125 , G11B7/24 , G11B7/24085 , G11B11/105 , G11B19/02 , G11B3/78
CPC分类号： G11B7/0045 , G11B11/10528 , G11B11/10578 , G11B11/10595 , G11B19/02 , G11B7/0938 , G11B7/126 , G11B7/24 , G11B7/24085
摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.
摘要翻译：一种光记录元件，包括记录介质，该记录介质包括在非连续状态下在每个单元处形成的信息记录区域，所述记录介质还包括以固定距离间隔设置的样品坑，以提供关于记录单元的位置的基本信息在同一轨道。每个采样坑包括靠近记录单元序列设置的多个凹坑，使得凹坑之间的间隔与记录单元之间的间隔不同。多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。一种驱动系统，用于驱动用于在非连续记录区域中记录信息的光学记录元件，或者用存储在其中的光束擦除信息，该光束的输出根据需要变化，并且检查是否正确地执行了所述记录或擦除光束通过非连续记录区域的非常短的时间。通过与其驱动系统结合使用光学记录元件，可以大大提高用于减少，擦除和验证这些功能的处理速度，并且可以正确地控制每个记录单元处的光束的照射位置。

46. 发明授权

US5170390A Optical recording element and driving system 失效
标题翻译：光学记录元件和驱动系统
公开(公告)号：US5170390A
公开(公告)日：1992-12-08
申请号：US394750
申请日：1989-08-16
申请人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
发明人： Kenji Ohta , Tetsuya Inui , Hiroyuki Katayama , Akira Takahashi , Junji Hirokane , Yukinori Nishitani , Michinobu Mieda , Kazuo Van
IPC分类号： G11B7/0045 , G11B7/013 , G11B7/09 , G11B7/125 , G11B7/24 , G11B7/24085 , G11B11/105 , G11B19/02
CPC分类号： G11B7/0045 , G11B11/10528 , G11B11/10578 , G11B11/10595 , G11B19/02 , G11B7/0938 , G11B7/126 , G11B7/24 , G11B7/24085
摘要： An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of recording units in the same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.

47. 发明授权

US5595805A Magneto-optical recording medium 失效
标题翻译：磁光记录介质
公开(公告)号：US5595805A
公开(公告)日：1997-01-21
申请号：US318536
申请日：1994-10-05
申请人： Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Junsaku Nakajima , Akira Takahashi , Kenji Ohta
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。

48. 发明授权

US5427833A Magneto-optical recording medium and method for processing the surface 失效
标题翻译：磁光记录介质及表面处理方法
公开(公告)号：US5427833A
公开(公告)日：1995-06-27
申请号：US175957
申请日：1993-12-30
申请人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
发明人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
IPC分类号： G11B11/10 , B29C59/02 , B29L17/00 , G11B5/60 , G11B7/26 , G11B11/105 , 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。

49. 发明授权

US5328740A Magneto-optical recording medium and method for processing the surface 失效
标题翻译：磁光记录介质及表面处理方法
公开(公告)号：US5328740A
公开(公告)日：1994-07-12
申请号：US650283
申请日：1991-02-04
申请人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
发明人： Junichiro Nakayama , Yoshiteru Murakami , Hiroyuki Katayama , Kenji Ohta
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。

50. 发明授权

US5082690A Process for manufacturing a magneto-optic disc 失效
标题翻译：制造磁光盘的方法
公开(公告)号：US5082690A
公开(公告)日：1992-01-21
申请号：US523756
申请日：1990-05-15
申请人： Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Yoshiteru Murakami , Kenji Ohta
发明人： Tomoyuki Miyake , Hiroyuki Katayama , Junichiro Nakayama , Yoshiteru Murakami , Kenji Ohta
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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