公开(公告)号：US20110058460A1

公开(公告)日：2011-03-10

申请号：US12814091

申请日：2010-06-11

申请人： Masaki Yamamoto ,  Hirohisa Yamada ,  Yasuhiro Harada ,  Go Mori ,  Hideharu Tajima ,  Shigemi Maeda ,  Yoshiteru Murakami

发明人： Masaki Yamamoto ,  Hirohisa Yamada ,  Yasuhiro Harada ,  Go Mori ,  Hideharu Tajima ,  Shigemi Maeda ,  Yoshiteru Murakami

IPC分类号： G11B7/00

CPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/005 ,  G11B7/08511 ,  G11B7/12 ,  G11B7/126 ,  G11B7/1263 ,  G11B7/24 ,  G11B7/24038 ,  G11B19/125 ,  G11B19/128 ,  G11B2007/0013

摘要： In an optical information storage medium reproduction apparatus (10) for reproducing an optical information storage medium including a plurality of information recording layers each including a recording mark having a length shorter than an optical system resolution limit, reproduction laser power for reading an information recording layer closest to a reproduction-laser-incident surface of the optical information storage medium is set to be lower than reproduction laser power for reading an information recording layer farthest from the reproduction-laser-incident surface but not lower than minimum reproduction laser power that satisfies a reproduction signal characteristic that the optical information storage medium reproduction apparatus (10) requires. With the arrangement, it is possible to prevent that the information recording layer closest to the reproduction-laser-incident surface is irradiated wrongly with reproduction laser having high reproduction laser power, thereby making it possible to obtain successful reproduction quality. That is, it is possible to realize the optical information storage medium reproduction apparatus (10) that can set optimum reproduction laser power and perform stable super resolution reproduction.

摘要翻译： 在用于再现包括多个信息记录层的光信息存储介质的光学信息存储介质再现设备（10）中，每个信息记录层包括长度短于光学系统分辨率极限的记录标记，用于读取信息记录层的再现激光功率 最靠近光学信息存储介质的再现激光入射表面被设置为低于用于读取距再生激光入射面最远的信息记录层的再生激光功率，但不低于满足 光信息存储介质再生装置（10）要求的再现信号特性。 通过这种布置，可以防止最接近再现激光入射表面的信息记录层与具有高再现激光功率的再现激光器错误地照射，从而可以获得成功的再现质量。 也就是说，可以实现能够设置最佳再现激光功率并且执行稳定的超分辨率再现的光学信息存储介质再现装置（10）。

公开(公告)号：US20100054093A1

公开(公告)日：2010-03-04

申请号：US12513110

申请日：2007-07-17

申请人： Noboru Iwata ,  Yoshiteru Murakami

发明人： Noboru Iwata ,  Yoshiteru Murakami

IPC分类号： G11B11/00

CPC分类号： G11B5/855 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/743 ,  G11B7/1387 ,  G11B11/10536 ,  G11B11/10584

摘要： A magnetic recording medium (1a) includes: a plurality of magnetic dots (13), provided on a substrate (11), in each of which information is stored by heating of the magnetic body; and separator layers (50). Each of the separator layers (50) is structured such that a metallic body layer (52) and two dielectric body layers (51) are alternately stacked in an in-plane direction of the substrate (11). Each of the separator layers (50) separates two magnetic dots from each other in the in-plane direction. Both sides of each of the magnetic dots (13) in the in-plane direction of the substrate (11) have contact with two dielectric body layers (52), respectively. This provides a magnetic recording medium (1a) whose magnetic dots (13) can be entirely heated with a reduction in the amount of power that is consumed by a recording head.

摘要翻译： 磁记录介质（1a）包括：设置在基板（11）上的多个磁点（13），每个磁点通过加热磁体而存储信息; 和隔离层（50）。 每个分隔层（50）被构造成使得金属体层（52）和两个介电体层（51）在基板（11）的面内方向上交替堆叠。 每个分隔层（50）在面内方向上分离两个磁性点。 在基板（11）的面内方向上的每个磁性点（13）的两侧分别与两个介电体层（52）接触。 这提供了一种磁记录介质（1a），其磁点（13）可以被完全加热，同时减少了由记录头消耗的功率量。

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：US6031816A

公开(公告)日：2000-02-29

申请号：US330495

申请日：1999-06-11

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： G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/24 ,  G11B7/26 ,  G11B11/105

CPC分类号： G11B7/005 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/261 ,  G11B11/10578 ,  G11B11/10582 ,  G11B7/0938 ,  G11B7/24

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。

公开(公告)号：US6001467A

公开(公告)日：1999-12-14

申请号：US13987

申请日：1993-02-05

申请人： Kenji Ohta ,  Akira Takahashi ,  Yoshiteru Murakami ,  Junichiro Nakayama ,  Tomoyuki Miyake

发明人： Kenji Ohta ,  Akira Takahashi ,  Yoshiteru Murakami ,  Junichiro Nakayama ,  Tomoyuki Miyake

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。

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。

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。

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。

公开(公告)号：US5705286A

公开(公告)日：1998-01-06

申请号：US163096

申请日：1993-12-07

申请人： Junji Hirokane ,  Yoshiteru Murakami ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

发明人： Junji Hirokane ,  Yoshiteru Murakami ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

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

CPC分类号： G11B11/10586 ,  Y10S428/90

摘要： A magneto-optical recording medium has an exchange-coupled triplilayer film wherein a readout layer which has in-plane magnetization at room temperature, and in which a transition occurs from in-plane magnetization to perpendicular magnetization when temperature thereof is raised above T.sub.1, an intermediate layer which has perpendicular magnetization at room temperature, the perpendicular magnetization being maintained from room temperature to Curie temperature T.sub.3, and a recording layer which has perpendicular magnetization at room temperature, the perpendicular magnetization been maintained from room temperature to Curie temperature T.sub.2 which are laminated in this order, and the temperatures T.sub.1, T.sub.2 and T.sub.3 satisfy the following inequality: T.sub.1

摘要翻译： 磁光记录介质具有交换耦合三层膜，其中在室温下具有面内磁化的读出层，并且其温度升高到T1以上时从平面内磁化转变为垂直磁化的读出层， 在室温下具有垂直磁化的中间层，垂直磁化维持在室温至居里温度T3，以及在室温下具有垂直磁化的记录层，垂直磁化维持在室温至居里温度T2之间，层压 按照该顺序，温度T1，T2和T3满足以下不等式：T1

公开(公告)号：US5657299A

公开(公告)日：1997-08-12

申请号：US588629

申请日：1996-01-19

申请人： Junsaku Nakajima ,  Yoshiteru Murakami ,  Akira Takahashi

发明人： Junsaku Nakajima ,  Yoshiteru Murakami ,  Akira Takahashi

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B11/00 ,  G11B5/66

CPC分类号： G11B11/10593

摘要： A magneto-optical recording medium has magnetic multi-layers including a reproductive layer, which is a magnetic layer having perpendicular magnetic anisotropy, for reading out magneto-optically recorded information and a recording layer, which is a magnetic layer having perpendicular magnetic anisotropy, for magneto-optically recording information. In the magneto-optical recording medium, the following conditions are fulfilled:H.sub.C1 (ta)+.sigma.w(ta)/2M.sub.S1 (ta)h.sub.1

摘要翻译： 磁光记录介质具有磁性多层，包括作为具有垂直磁各向异性的磁性层的复制层，用于读出磁光记录的信息，以及作为具有垂直磁各向异性的磁性层的记录层，用于 磁光记录信息。 在磁光记录介质中满足以下条件：HC1（ta）+ sigma w（ta）/ 2MS1（ta）h1 <-HC1（t）+ sigmaw（t）/ 2MS1（t）h1， 40（nm）其中h1是生殖层的厚度，HC1（ta）是室温下的生殖层的矫顽力（ta），MS1（ta）是饱和磁化强度 的生物层MS2（ta）是记录层的饱和磁化强度，σw（ta）是在所述生殖层和记录层之间形成的磁畴壁的磁畴壁能量，HC1（t）是矫顽力 温度（t）不高于室温的一定温度（tm）的生殖层MS1（t）是生殖层的饱和磁化强度，MS2（t）是记录层的饱和磁化强度， 和σw（t）是在生殖层和记录层之间形成的磁畴壁的磁畴壁能。