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公开(公告)号：US5644566A
公开(公告)日：1997-07-01
申请号：US432683
申请日：1995-05-02
申请人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Junji Hirokane , Akira Takahashi , Kenji Ohta
发明人： Junichiro Nakayama , Michinobu Mieda , Hiroyuki Katayama , Junji Hirokane , Akira Takahashi , Kenji Ohta
IPC分类号： G11B11/105 , G11B7/00
CPC分类号： G11B11/10586 , G11B11/10517
摘要： An intermediate layer is formed between a memory layer and a writing layer. The intermediate layer shows in-plane magnetization at room temperature, and perpendicular magnetization within a temperature range within which the coercive force of the memory layer is lower than that of the writing layer. The Curie point of the intermediate layer is lower than that of the memory layer. Like a conventional method, light-intensity modulation overwriting is performed by irradiating laser light whose intensity has been modulated between high level and low level while applying a recording magnetic field after performing an initialization. Even when there are variations in the raised temperature by the irradiation of laser light of high level, it is possible to perform stable overwriting with light-intensity modulation by satisfactorily restraining the exchange forces between the intermediate layer and the writing layer from causing coupling.
摘要翻译： 在存储层和写入层之间形成中间层。 中间层在室温下显示出平面内的磁化强度，在存储层的矫顽力低于书写层的温度范围内的垂直磁化强度。 中间层的居里点低于存储层的居里点。 像传统方法一样，通过在执行初始化之后照射记录磁场的同时照射强度已经被调制在高电平和低电平之间的激光来执行光强调制重写。 即使通过高水平的激光照射而升高的温度存在变化，也可以通过令人满意地抑制中间层与书写层之间的交换作用而进行光强调制来进行稳定的重写。
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32.发明授权
公开(公告)号：US5640374A
公开(公告)日：1997-06-17
申请号：US659391
申请日：1996-06-06
IPC分类号： G11B11/10 , G11B7/013 , G11B11/105 , G11B20/10 , G11B11/00
CPC分类号： G11B20/10009 , G11B11/10515 , G11B11/10584 , G11B11/10586 , G11B7/24085
摘要： A recording layer having a recording magnetic domain for recording thereon information is formed. A readout layer for reading the information by the application of a light beam is formed on the recording layer. An intermediate layer made of a film having in-plane magnetization is formed between the recording layer and readout layer to control a magnetic exchange coupling force between the recording layer and readout layer. The readout layer is arranged so that the stable magnetic domain width in the readout layer is larger than that of the recording magnetic domain in the recording layer at room temperature. At a readout temperature achieved by the light beam, the stable magnetic domain width becomes smaller than that of the recording magnetic domain, and the magnetization direction in the recording magnetic domain is copied. Consequently, the information on the recording layer is read only from a section corresponding to a central portion of the light beam through the readout layer by the light beam, and the effect of other magnetic domains adjacent to the magnetic domain to be read in the readout layer can be reduced. It is thus possible to achieve high density recording of information on the recording layer.
摘要翻译： 形成具有用于在其上记录信息的记录磁畴的记录层。 在记录层上形成用于通过施加光束读取信息的读出层。 在记录层和读出层之间形成由具有面内磁化强度的膜构成的中间层，以控制记录层和读出层之间的磁交换耦合力。 读出层被布置成使得读出层中的稳定的磁畴宽度大于在室温下在记录层中的记录磁畴的稳定的磁畴宽度。 在由光束获得的读出温度下，稳定的磁畴宽度变得小于记录磁畴的磁畴宽度，并且记录磁畴中的磁化方向被复制。 因此，记录层上的信息仅从对应于通过光束的读出层的光束的中心部分的部分读取，并且与磁畴相邻的其它磁畴的影响将被读取到读出 层可以减少。 因此，可以在记录层上实现信息的高密度记录。
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33.发明授权
公开(公告)号：US5087535A
公开(公告)日：1992-02-11
申请号：US19704
申请日：1987-02-27
申请人： Junji Hirokane , Hiroyuki Katayama , Akira Takahashi , Tetsuya Inui , Kenji Ohta , Junichi Washo , Tomoyuki Miyake , Kazuo Van , Michinobu Mieda
发明人： Junji Hirokane , Hiroyuki Katayama , Akira Takahashi , Tetsuya Inui , Kenji Ohta , Junichi Washo , Tomoyuki Miyake , Kazuo Van , Michinobu Mieda
CPC分类号： G03F1/54 , G03F1/68 , G11B7/261 , Y10S430/146
摘要： A photo-mask and a method of manufacturing a photo-mask, which includes the steps of applying a resist film onto a substrate of quartz, glass and the like, subjecting the resist film to light exposure and development to form a fine resist pattern, etching the mask substrate covered by the fine resist pattern causing a non-light transmitting thin film of Cr, Ta, etc. to adhere thereon by vapor deposition, sputtering and the like, and removing the thin film on the resist pattern together with the resist film, thereby to form the photo-mask.
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公开(公告)号：US5982713A
公开(公告)日：1999-11-09
申请号：US719753
申请日：1996-09-25
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10586
摘要： A magneto-optical recording medium includes first, second, and third magnetic layers laminated in this order. The first magnetic layer, made of a rare earth-transition metal alloy, has a great coercive force at room temperature and is transition metal rich in a temperature range between room temperature and a Curie temperature of the first magnetic layer. The second magnetic layer, made of a rare earth-transition metal alloy, has a Curie temperature higher than that of the first magnetic layer and is rare-earth metal rich at room temperature. The third magnetic layer, made of a rare earth-transition metal alloy, has a Curie temperature higher than that of the first magnetic layer, and a compensation temperature falling in a temperature range between room temperature and the Curie temperature of the third magnetic layer. A magnetization of the third magnetic layer is transferred to the first magnetic layer at a temperature higher than room temperature. A perpendicular magnetic anisotropy Ku3 satisfies 0.3.times.10.sup.6 erg/cc
摘要翻译： 磁光记录介质包括依次层叠的第一，第二和第三磁性层。 由稀土 - 过渡金属合金制成的第一磁性层在室温下具有很大的矫顽力，并且是在室温和第一磁性层的居里温度之间的温度范围内富含过渡金属。 由稀土 - 过渡金属合金制成的第二磁性层的居里温度高于第一磁性层的居里温度，并且在室温下富含稀土金属。 由稀土 - 过渡金属合金制成的第三磁性层的居里温度高于第一磁性层的居里温度，并且补偿温度落在室温和第三磁性层的居里温度之间的温度范围内。 在高于室温的温度下将第三磁性层的磁化转移到第一磁性层。 垂直磁各向异性Ku3满足0.3×10 6 erg / cc
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公开(公告)号：US5838645A
公开(公告)日：1998-11-17
申请号：US866594
申请日：1997-05-30
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing nonmagnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译： 具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层 层，以及通过照射光束从中读出数据的再现层，它们在其间插入非磁性中间层的顺序层叠。 辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。 再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。 第一和第二温度满足条件表示为：室温<第二温度<第一温度APPROXLESS光束点中的最大温度。 因此，在再现层中立即产生并擦除反向磁畴，并且所得到的再现信号是矩形信号，从而可以提供能够精确地再现高密度记录数据的磁光记录介质。
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公开(公告)号：US5684764A
公开(公告)日：1997-11-04
申请号：US595259
申请日：1996-02-01
IPC分类号： G11B11/10 , G11B11/105 , G11B11/00
CPC分类号： G11B11/10515 , G11B11/10586
摘要： A magneto-optical disk provided with a record layer having a recording magnetic domain where data are recorded, an auxiliary reproduction layer for transferring the record data in the record layer to a reproduction layer by generating a floating magnetic field corresponding to the data in the record layer, and the reproduction layer from which the data are read out through irradiation of a light beam, which are sequentially layered while interposing non-magnetic intermediate layers therebetween. The stable magnetic domain width in the auxiliary reproduction layer is shorter than the recording magnetic domain width at room temperature and extends as the temperature rises and becomes longer at or above a first temperature. The stable magnetic domain width in the reproduction layer is longer than the recording magnetic domain width at room temperature and lessens as the temperature rises and becomes shorter at or above a second temperature which is lower than the first temperature. The first and second temperatures satisfy a condition expressed as: room temperature
摘要翻译： 具有记录数据的记录磁畴的磁光盘，用于通过产生与记录中的数据相对应的浮动磁场将记录层中的记录数据传送到再现层的辅助再现层 层，以及通过照射光束从中读出数据的再现层，它们在介于其间的非磁性中间层的顺序层叠。 辅助再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度短，随着温度升高而延长，在第一温度以上也变长。 再生层中的稳定的磁畴宽度比室温下的记录磁畴宽度长，随着温度的升高而降低，在比第一温度低的第二温度以上也变短。 第一和第二温度满足表示为：室温<第二温度<第一温度
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公开(公告)号：US5659537A
公开(公告)日：1997-08-19
申请号：US459338
申请日：1995-06-02
IPC分类号： G11B11/10 , G11B11/105 , G11B7/00
CPC分类号： G11B11/10593 , G11B11/10515 , G11B11/10584
摘要： A recording layer including a recording magnetic domain for recording thereon information is formed. A reproducing layer for reproducing information by projecting thereto a light beam is formed on the recording layer. A non-magnetic intermediate layer for intercepting a magnetic exchange coupling force exerted between the recording layer and the reproducing layer is formed between the recording layer and the reproducing layer. The reproducing layer is arranged such that the width of the stable magnetic domain on the reproducing layer at room temperature is larger than the width of the recording magnetic domain in the recording layer. At a reproducing temperature by the light beam, the width of the stable magnetic domain becomes smaller than the width of the recording magnetic domain, and the information is copied by the leakage magnetic flux of the recording magnetic domain. Depending on whether or not the information transferred to the reproducing layer is reproduced, the effects from other magnetic domain adjacent to the magnetic domain to be reproduced from the reproducing layer can be prevented, thereby enabling a high density recording of information on the recording layer.
摘要翻译： 形成包括用于在其上记录信息的记录磁畴的记录层。 在记录层上形成用于通过向其投射光来再现信息的再现层。 在记录层和再现层之间形成用于截取在记录层和再现层之间施加的磁交换耦合力的非磁性中间层。 再现层被布置成使得在室温下再现层上的稳定磁畴的宽度大于记录层中记录磁畴的宽度。 在光束的再现温度下，稳定磁畴的宽度变得小于记录磁畴的宽度，并且通过记录磁畴的泄漏磁通来复制信息。 根据传送到再现层的信息是否被再现，可以防止从再现层再现的与磁畴相邻的其它磁畴的影响，从而能够在记录层上高密度地记录信息。
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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。
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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。
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公开(公告)号：US07859983B2
公开(公告)日：2010-12-28
申请号：US10890916
申请日：2004-07-13
申请人： Junji Hirokane , Michinobu Mieda , Masanori Shimo
发明人： Junji Hirokane , Michinobu Mieda , Masanori Shimo
IPC分类号： G11B7/00
CPC分类号： G11B7/24038 , G11B7/263
摘要： An optical disk includes a plurality of disk sheets which are laminated, and each of which has a recording face on one of the surfaces and a flat back surface, wherein the plurality of disk sheets are laminated by adhesive layers in such a manner that between adjacent two disk sheets, a back surface of one of the disk sheets, on the opposite side of the surface where the recording face is formed, faces the disk surface of the other disk sheet. The foregoing structure realizes an optical disk of desirable recording/reproducing characteristics, which is flat and has a fixed interval between recording faces, and which permits the problems of coma aberration, spherical aberration, etc., to be suppressed.
摘要翻译： 光盘包括层叠的多个盘片，并且每个盘片在其一个表面上具有记录面和平坦的后表面，其中所述多个盘片以粘合层层压，使得在相邻 在形成有记录面的表面的相对侧上的一个盘片的背面的两个盘片面对另一盘片的盘表面。 上述结构实现了平坦的并且在记录面之间具有固定间隔的期望的记录/再现特性的光盘，并且允许抑制彗差，球面像差等问题。
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