公开(公告)号：US06690626B2

公开(公告)日：2004-02-10

申请号：US10125143

申请日：2002-04-18

申请人： Masahiro Birukawa ,  Tomoyuki Hiroki ,  Yasushi Hozumi

发明人： Masahiro Birukawa ,  Tomoyuki Hiroki ,  Yasushi Hozumi

IPC分类号： G11B1100

CPC分类号： G11B11/10584 ,  G11B7/00745 ,  G11B11/10578 ,  G11B11/10582 ,  G11B11/10597

摘要： On a disk-shaped substrate in which a predetermined region ranging in a radial direction is used as a data region for recording/reproduction, a first dielectric layer, a magnetic layer, and a second dielectric layer are provided. The data region includes recording/reproducing tracks composed of a plurality of discontinuous grooves or lands ranging from an innermost track to an outermost track. Magnetic anisotropy of each of magnetic layers positioned between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the recording/reproducing tracks, so that the magnetic layers are magnetically separated only between the recording/reproducing tracks and not magnetically separated in flat portions without grooves. Thus, reflectance is even in the flat portions, thereby allowing tilt detection.

摘要翻译： 在其中使用沿径向范围的预定区域作为记录/再现用的数据区域的盘形基板上，设置第一介电层，磁性层和第二介质层。 数据区域包括由从最内侧的轨道到最外侧轨道的多个不连续的槽或焊盘组成的记录/再现轨迹。 位于相应的记录/再现轨道之间的每个磁性层的磁各向异性被降低到比位于记录/再现轨道上的磁性层的磁各向异性低的水平，使得磁层仅在记录 /再现轨道，并且在没有凹槽的平坦部分中不磁性地分离。 因此，在平坦部分中的反射率是均匀的，从而允许倾斜检测。

公开(公告)号：US06765847B2

公开(公告)日：2004-07-20

申请号：US10125742

申请日：2002-04-18

申请人： Masahiro Birukawa ,  Yasumori Hino ,  Yasushi Hozumi ,  Tomoyuki Hiroki

发明人： Masahiro Birukawa ,  Yasumori Hino ,  Yasushi Hozumi ,  Tomoyuki Hiroki

IPC分类号： G11B1100

CPC分类号： G11B11/10582 ,  G11B11/10578 ,  G11B11/10584

摘要： On a disk-shaped substrate with pits and grooves, a first dielectric layer, a magnetic layer, and a second dielectric layer are formed. A data region used for recording/reproduction includes a plurality of tracks, and is divided into a plurality of segments. Each segment includes a pit region and a groove region. Recording/reproducing tracks are composed of the grooves. Magnetic anisotropy of a magnetic layer positioned on each of lands between the respective recording/reproducing tracks is reduced to a level lower than that of magnetic anisotropy of the magnetic layers positioned on the grooves, so that the recording/reproducing tracks are magnetically separated. On an inner side of an innermost recording/reproducing track and on an outer side of an outermost recording/reproducing track, at least one dummy track is provided, respectively.

摘要翻译： 在具有凹坑和凹槽的盘状基板上形成第一介电层，磁性层和第二介质层。 用于记录/再现的数据区包括多个轨道，并被分成多个段。 每个段包括凹坑区和凹槽区。 记录/再现轨道由凹槽组成。 位于相应的记录/再现轨道之间的每个区域上的磁性层的磁各向异性被降低到低于定位在凹槽上的磁性层的磁各向异性的水平，使得记录/再现轨迹被磁分离。 在最内记录/再现轨迹的内侧和最外侧记录/重放轨道的外侧上分别设置至少一个虚拟轨迹。

公开(公告)号：US08526293B2

公开(公告)日：2013-09-03

申请号：US12682828

申请日：2009-06-12

申请人： Rie Kojima ,  Masahiro Birukawa ,  Kenji Narumi ,  Noboru Yamada

发明人： Rie Kojima ,  Masahiro Birukawa ,  Kenji Narumi ,  Noboru Yamada

IPC分类号： G11B3/70 ,  G11B5/84 ,  G11B7/26

CPC分类号： G11B7/1387 ,  G11B7/00454 ,  G11B7/006 ,  G11B7/08511 ,  G11B7/24 ,  G11B7/24038 ,  G11B7/2433 ,  G11B7/2578 ,  G11B7/266 ,  G11B2007/0013 ,  G11B2007/24312 ,  G11B2007/24314 ,  G11B2007/24316 ,  G11B2007/25706 ,  G11B2007/25708 ,  G11B2007/2571 ,  G11B2007/25715

摘要： The information recording medium (100) of the present invention includes: an information layer (110) including a recording layer (115) capable of changing its phase containing at least one selected from Ge—Te, Sb—Te and Ge—Sb, and two or more dielectric layers (117, 118) disposed on the optical beam incident side with respect to the recording layer (115); and a transparent layer (102) disposed on the optical beam incident side with respect to the information layer (110) adjacent to the information layer, made of a transparent material with respect to the optical beam, and having a refractive index n of 1.75 or more. When two dielectric layers (117, 118) from the near side to the transparent layer (102) each are referred to as a dielectric layer b (118) and a dielectric layer a (117) from the optical beam incident side among the two or more dielectric layers (117, 118), a relationship of the refractive index n of the transparent layer 102, a refractive index nb of the dielectric layer b (118) and a refractive index na of the dielectric layer a satisfies nb 1 by irradiation with optical beam.

摘要翻译： 本发明的信息记录介质（100）包括：信息层（110），包括能够改变其含有选自Ge-Te，Sb-Te和Ge-Sb中的至少一种的相的记录层（115），以及 设置在相对于记录层（115）的光束入射侧的两个或更多个电介质层（117,118）; 以及相对于信息层（110）设置在光束入射侧的相对于光束由透明材料制成的透明层（102），并且折射率n为1.75或 更多。 当从近侧到透明层（102）的两个电介质层（117,118）各自被称为介电层b（118）和电介质层a（117）时，来自光束入射侧的两个或 更多的电介质层（117,118），透明层102的折射率n，电介质层b（118）的折射率nb和电介质层a的折射率na之间的关系满足nb 1的光学系统来记录或再现信息。

公开(公告)号：US08451699B2

公开(公告)日：2013-05-28

申请号：US13580406

申请日：2011-02-23

申请人： Kenji Narumi ,  Masahiro Birukawa

发明人： Kenji Narumi ,  Masahiro Birukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0908 ,  G11B7/1387

摘要： The present invention accurately operates a tilt servo even if a gap servo is operated with a small gap. A condensing unit (102) generates a near-field light and condenses a laser beam on an optical disk (1), a light quantity detection unit (104) detects light quantity of return light from an area where the near-field light is generated, a gap control unit (105) controls a gap between the condensing unit (102) and the optical disk (1) based on the light quantity of the return light, a tilt calculation unit (106) calculates, in a state of controlling the gap, an inclination amount between the condensing unit (102) and the optical disk (1) based on the light quantity of the return light, a tilt error signal generation unit (107) generates from the inclination amount a tilt error signal, which is a signal from which a fluctuation component of the return light generated due to decentering of the optical disk (1) is removed, and a tilt control unit (108) controls the inclination between the condensing unit (102) and the optical disk (1) based on the tilt error signal.

摘要翻译： 即使间隙伺服以小的间隙操作，本发明也能精确地操作倾斜伺服。 聚光单元（102）产生近场光并将激光束聚光在光盘（1）上，光量检测单元（104）检测来自产生近场光的区域的返回光的光量 ，间隙控制单元（105）基于返回光的光量来控制聚光单元（102）和光盘（1）之间的间隙，倾斜计算单元（106）在控制 间隙，基于返回光的光量在聚光单元（102）和光盘（1）之间的倾斜量，倾斜误差信号生成单元（107）从倾斜量产生倾斜误差信号，倾斜误差信号是 去除由于光盘（1）的偏心而产生的返回光的波动分量的信号，并且倾斜控制单元（108）控制聚光单元（102）和光盘（1）之间的倾斜度， 基于倾斜误差信号。

公开(公告)号：US08422341B2

公开(公告)日：2013-04-16

申请号：US12596937

申请日：2008-04-22

申请人： Kenji Narumi ,  Masahiro Birukawa

发明人： Kenji Narumi ,  Masahiro Birukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/00736 ,  G11B7/08511 ,  G11B7/1387

摘要： An apparatus 100 according to the present invention is designed to read and/or write data from/on an information recording medium 1 using near-field light. The apparatus 100 includes: a light source 3 for emitting laser light; a condensing section 7 for producing the near-field light based on the laser light; a detecting section 22, 23 for detecting the relative positions of the condensing section 7 and the information recording medium 1; and a control section 14 for controlling the position of the condensing section 7. In starting a gap servo operation, the control section 14 controls the position of the condensing section 7 so that the gap servo operation is started at a different location on the information recording medium 1 from any other location where the gap servo operation has ever been started.

摘要翻译： 根据本发明的设备100被设计为使用近场光从信息记录介质1上读/写数据。 装置100包括：用于发射激光的光源3; 用于产生基于激光的近场光的聚光部分7; 用于检测冷凝部分7和信息记录介质1的相对位置的检测部分22,23; 以及用于控制冷凝部分7的位置的控制部分14.在开始间隙伺服操作时，控制部分14控制冷凝部分7的位置，使得间隙伺服操作在信息记录的不同位置开始 任何其他间隙伺服操作已经开始的位置的介质1。

公开(公告)号：US08233372B2

公开(公告)日：2012-07-31

申请号：US12679049

申请日：2008-09-19

申请人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Katsuhiko Hayashi ,  Masahiro Birukawa

发明人： Yasuhiro Tanaka ,  Michihiro Yamagata ,  Katsuhiko Hayashi ,  Masahiro Birukawa

IPC分类号： G11B7/00

CPC分类号： G11B7/13927 ,  G11B7/1378 ,  G11B7/1387 ,  G11B2007/0013 ,  G11B2007/13727

摘要： An optical system for optical pickup, which optical system is used for performing recording, reproducing, and/or erasing of information on an optical recording medium and has a simple configuration, is provided. An optical pickup device 1 includes a collimator lens system 23, a beam expander 33, and an objective lens system 34 that includes an S-SIL element 27b. The beam expander 33 includes a lens element 33c that is supported so as to be movable in a direction perpendicular to an optical axis. By moving the lens element 33c in the direction perpendicular to the optical axis, a coma aberration of a spot on a recording layer can be compensated in a state where the interval between a surface of an optical recording medium 28 and the S-SIL element 27b opposed thereto is maintained constant.

摘要翻译： 提供了一种用于光学拾取器的光学系统，该光学系统用于在光学记录介质上执行信息的记录，再现和/或擦除并且具有简单的配置。 光拾取装置1包括准直透镜系统23，光束扩展器33和包括S-SIL元件27b的物镜系统34。 光束扩展器33包括透镜元件33c，该透镜元件被支撑为能够在垂直于光轴的方向上移动。 通过沿与光轴垂直的方向移动透镜元件33c，可以在光记录介质28的表面与S-SIL元件27b之间的间隔的状态下补偿记录层上的斑点的彗形像差 与之相对保持恒定。

公开(公告)号：US20080291573A1

公开(公告)日：2008-11-27

申请号：US10585117

申请日：2005-04-28

申请人： Motoyoshi Murakami ,  Masahiro Birukawa

发明人： Motoyoshi Murakami ,  Masahiro Birukawa

IPC分类号： G11B5/82 ,  B44C1/22

CPC分类号： G11B11/10582 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/84 ,  G11B11/10578 ,  G11B11/10584 ,  G11B11/10586 ,  G11B2005/0021

摘要： With a magnetic recording medium, servo pits have to be recorded one disk at a time, which is a problem in that it takes more time and is more expensive. In view of this, with the present invention, at least one signal region whose surface roughness is different from that of other than the signal region is formed on the substrate of a magnetic recording medium comprising a recording layer on a substrate, or on an under layer formed on a substrate.

摘要翻译： 使用磁记录介质，伺服凹坑一次必须记录一个磁盘，这是一个需要更多时间并且更昂贵的问题。 鉴于此，利用本发明，在包括基板上的记录层或下面的记录层的磁记录介质的基板上形成表面粗糙度与信号区域以外的表面粗糙度不同的至少一个信号区域 层。

公开(公告)号：US20050086679A1

公开(公告)日：2005-04-21

申请号：US10497273

申请日：2002-11-25

申请人： Motoyoshi Murakami ,  Takeshi Sakaguchi ,  Masahiro Birukawa

发明人： Motoyoshi Murakami ,  Takeshi Sakaguchi ,  Masahiro Birukawa

IPC分类号： G11B7/007 ,  G11B11/105 ,  G11B11/00 ,  G11B7/24 ,  G11B23/03

CPC分类号： B82Y10/00 ,  G11B5/746 ,  G11B7/24076 ,  G11B7/24079 ,  G11B11/10515 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10591

摘要： It is an object of the present invention to provide a magneto-optical recording medium including a recording film having at least a reproduction layer, an intermediate layer, and a recording layer, on an optical disk substrate, wherein the recording film is a magnetic film that is magnetically coupled and that has magnetic anisotropy in a direction vertical to its film surface, the recording magnetic domains formed in the recording layer are transferred to the reproduction layer, and recording information is reproduced by domain wall movement in the reproduction layer, and the recording layer has columnar structures that are oriented substantially vertically. Thus, it is possible to provide a magneto-optical recording medium with which signals below the diffraction limit of the light spot for recording and reproducing information can be reproduced at high speed, with which the recording density and the transfer speed can be significantly increased, and with which stable recording magnetic domains can be formed even if recorded at high density.

摘要翻译： 本发明的目的是提供一种磁光记录介质，其包括在光盘基板上至少具有再现层，中间层和记录层的记录膜，其中记录膜是磁性膜 其磁耦合并且在垂直于其膜表面的方向上具有磁各向异性，将形成在记录层中的记录磁畴传送到再现层，并且通过再现层中的畴壁移动来再现记录信息，并且 记录层具有基本垂直取向的柱状结构。 因此，可以提供一种磁光记录介质，可以高速再现用于记录和再现信息的光点的衍射极限以下的信号，从而可以显着提高记录密度和传送速度， 即使以高密度记录，也可以形成稳定的记录磁畴。

公开(公告)号：US06399227B1

公开(公告)日：2002-06-04

申请号：US08160976

申请日：1993-11-30

申请人： Yoshihiko Kudoh ,  Yasumori Hino ,  Yuuichi Fukamachi ,  Masahiro Birukawa

发明人： Yoshihiko Kudoh ,  Yasumori Hino ,  Yuuichi Fukamachi ,  Masahiro Birukawa

IPC分类号： B32B1518

CPC分类号： G11B11/10591 ,  G11B11/10523 ,  G11B11/10584 ,  Y10T428/1143 ,  Y10T428/12646 ,  Y10T428/12861 ,  Y10T428/12931 ,  Y10T428/24942 ,  Y10T428/265

摘要： A magneto-optical recording medium including a recording layer for recording information and a substrate for supporting the recording layer is disclosed. The recording layer includes: a recording magnetic film for recording the information, the recording magnetic film being formed of a perpendicular magnetic anisotropy film; a readout magnetic film for optically reading out the information, the readout magnetic film being capable of being magnetically coupled with the recording magnetic film by an exchange-coupling force; and a controlling magnetic film, provided between the recording magnetic film and the readout magnetic film, for controlling the exchange-coupling force. The controlling magnetic film has in-plane magnetic anisotropy at room temperature, thereby suppressing the exchange-coupling force between the recording magnetic film and the readout magnetic film, and when the temperature of the controlling magnetic film reaches a predetermined temperature by a readout light irradiation, the controlling magnetic film stops the suppression of the exchange-coupling force, whereby the information recorded in the recording magnetic film is magnetically transferred to the readout magnetic film.

摘要翻译： 公开了包括用于记录信息的记录层和用于支撑记录层的基板的磁光记录介质。 记录层包括：用于记录信息的记录磁性膜，记录磁性膜由垂直磁各向异性膜形成; 用于光学读出信息的读出磁膜，读出磁膜能够通过交换耦合力与记录磁性膜磁耦合; 以及设置在记录磁性膜和读出磁性膜之间的用于控制交换耦合力的控制磁性膜。 控制磁性膜在室温下具有面内的磁各向异性，从而抑制记录磁性膜与读出的磁性膜之间的交换耦合力，并且当控制磁性膜的温度通过读出光照射达到预定温度时 控制磁膜阻止了交换耦合力的抑制，由此记录在记录磁膜中的信息被磁性地传送到读出的磁性膜。

公开(公告)号：US5864520A

公开(公告)日：1999-01-26

申请号：US886149

申请日：1997-06-30

申请人： Yuichi Fukamachi ,  Masahiro Birukawa

发明人： Yuichi Fukamachi ,  Masahiro Birukawa

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

CPC分类号： G11B11/10584 ,  G11B11/10504 ,  G11B11/10586 ,  G11B11/10515

摘要： In a magneto-optical recording medium for super resolution reproduction, a recording layer having a Curie temperature of 300.degree. C. or higher is used. An inhibition force for inhibiting movement of a domain wall in the recording layer is enhanced, while the magnetization is sufficiently increased such that a contraction force, which decreases a surface area of the domain wall, can be decreased. Thus, recording domains become stable during recording and erasing. Further, cross erasing characteristics can be improved, while maintaining previously used recording and erasing powers. The inhibition force becomes larger than the contraction force, even if the Curie temperature is low, when the recording layer is made of a first magnetic material for forming recording domains which have a compensation temperature between 0.degree. and 200.degree. C., or when the compensation temperature of the recording layer is between 0.degree. and 200.degree. C.

摘要翻译： 在用于超分辨率再现的磁光记录介质中，使用居里温度为300℃或更高的记录层。 增强了抑制记录层中畴壁运动的抑制力，同时磁化强度得到充分提高，从而减小了畴壁表面积减小的收缩力。 因此，记录域在记录和擦除期间变得稳定。 此外，可以提高交叉擦除特性，同时保持先前使用的记录和擦除功率。 抑制力变得比收缩力大，即使居里温度低，当记录层由用于形成补偿温度在0〜200℃之间的记录区域的第一磁性材料制成时，或者当 记录层的补偿温度为0〜200℃。