公开(公告)号：US06811889B2

公开(公告)日：2004-11-02

申请号：US10121780

申请日：2002-04-12

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： G11B11105

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; and 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. The composition of the readout magnetic film may be chosen such that the exchange coupling force from the recording magnetic film does not affect the magnetization around the surface of the readout magnetic film on the side on which the readout light is incident.

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; 以及用于光学地读取信息的读出磁性膜，读出的磁性膜能够通过交换耦合力与记录磁性膜磁耦合。 可以选择读出磁性膜的组成，使得来自记录磁性膜的交换耦合力不影响在读出光入射侧的读出磁性膜的表面周围的磁化。

公开(公告)号：US20030185124A1

公开(公告)日：2003-10-02

申请号：US10403097

申请日：2003-04-01

申请人： Sony Corporation

发明人： Masato Hattori ,  Seiji Ohbi ,  Takashi Kawakami ,  Manabu Kii

IPC分类号： G11B007/00

CPC分类号： G11B20/1883 ,  G11B11/10523 ,  G11B11/10584 ,  G11B11/10595 ,  G11B20/00086 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B23/36 ,  G11B27/034 ,  G11B27/105 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B27/32 ,  G11B27/329 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/20 ,  G11B2220/2529

摘要： A storage medium initializing method includes steps of recording on a storage medium a management table configured to manage a replacement area for a defect area in a data area in the storage medium; recording a unique identification on the storage medium; and recording management data in the data area. The step of recording a unique identification includes recording the unique identification on the storage medium, but outside an area managed by the management data. The method optional includes initialization and cancellation steps.

公开(公告)号：US20020150001A1

公开(公告)日：2002-10-17

申请号：US09921523

申请日：2001-08-03

申请人： FUJITSU LIMITED

发明人： Yoshiyuki Nanba

IPC分类号： G11B011/00

CPC分类号： G11B11/10526 ,  G11B11/10515 ,  G11B11/10523 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10597

摘要： A magnetooptic recording medium has at least a recording layer for recording data and a reproducing layer for reproducing the data recorded in the recording layer onto a substrate and reproduces the data by setting a proper reproducing laser power upon reproduction. According to the magnetooptic recording medium, magnetizing directions of a buffer area, a sector address area, and a gap area which are sandwiched between data areas in which the data is recorded are uniformly magnetized in the recording direction.

摘要翻译： 磁光记录介质至少具有用于记录数据的记录层和用于将记录在记录层中的数据再现到基板上的再现层，并且通过在再现时设置适当的再现激光功率来再现数据。 根据磁光记录介质，在记录数据的数据区域之间的缓冲区域，扇区地址区域和间隙区域的磁化方向在记录方向上均匀地磁化。

公开(公告)号：US20020119348A1

公开(公告)日：2002-08-29

申请号：US10121780

申请日：2002-04-12

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

IPC分类号： G11B011/105

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.

公开(公告)号：US5683803A

公开(公告)日：1997-11-04

申请号：US433088

申请日：1995-05-03

申请人： Junichiro Nakayama ,  Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66 ,  B32B5/16

CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10523 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

摘要： A magneto-optical recording medium includes a first magnetic layer and a second magnetic layer being laminated. When information is to be recorded on the first magnetic layer, first, a magnetization direction in the second magnetic layer is arranged in one direction with an application of an initialization magnetic field. Then, an intensity modulated light beam is projected while applying thereto a recording magnetic field so as to change the magnetization direction in the second magnetic layer. Thereafter, the magnetization direction in the second magnetic layer is copied to the first magnetic layer, thereby recording information. The first magnetic layer has a magnetization in an intermediate direction between a perpendicular direction and an in-plane direction at room temperature, while has a perpendicular magnetization at above a predetermined temperature. Therefore, a smaller exchange coupling force is exerted from the first magnetic layer to the second magnetic layer at room temperature, thereby enabling a rewriting information with a smaller initialization magnetic field compared with the conventional method, thereby achieving a reduction in size of the apparatus and power conservation.

摘要翻译： 磁光记录介质包括层叠的第一磁性层和第二磁性层。 当要在第一磁性层上记录信息时，首先，通过施加初始化磁场，将第二磁性层中的磁化方向布置在一个方向上。 然后，施加强度调制光束，同时向其施加记录磁场，以改变第二磁性层中的磁化方向。 此后，将第二磁性层中的磁化方向复制到第一磁性层，从而记录信息。 第一磁性层在室温下具有在垂直方向和面内方向之间的中间方向上的磁化强度，同时具有高于预定温度的垂直磁化强度。 因此，与常规方法相比，在室温下从第一磁性层向第二磁性层施加较小的交换耦合力，从而能够实现与常规方法相比具有较小初始化磁场的重写信息，从而实现装置的尺寸减小 省电。

公开(公告)号：US5175721A

公开(公告)日：1992-12-29

申请号：US575013

申请日：1990-08-30

申请人： Junichiro Nakayama ,  Tomoyuki Miyake ,  Hiroyuki Katayama ,  Kenji Ohta

发明人： Junichiro Nakayama ,  Tomoyuki Miyake ,  Hiroyuki Katayama ,  Kenji Ohta

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B19/02

CPC分类号： G11B11/10595 ,  G11B11/10517 ,  G11B11/10523 ,  G11B11/1056 ,  G11B19/02

摘要： A recording and reading method and device of magneto-optical memory elements are provided to record and read an information signal to and from the magneto-optical memory elements, which contain at least two magnetic layers that are magnetically coupled, by means of a light-intensity modulated overwriting method employing a recording magnetic field and an initializing magnetic field feature is included for applying the initializing magnetic field to the magneto-optical memory elements at least one time between the point of time when moving the magneto-optical memory elements to a recording or reading position, finishing a reading or recording, and ascertaining the selected operation such as recording or erasing and the point of time when subsequent recording begins such that the initializing magnetic field is not applied at the same time as the recording magnetic field.

公开(公告)号：US20050180269A1

公开(公告)日：2005-08-18

申请号：US11105846

申请日：2005-04-14

申请人： Yoshiyuki Nanba

发明人： Yoshiyuki Nanba

IPC分类号： G11B5/02 ,  G11B11/105 ,  G11B11/00

CPC分类号： G11B11/10526 ,  G11B11/10515 ,  G11B11/10523 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10597

摘要： A magnetooptic recording medium has at least a recording layer for recording data and a reproducing layer for reproducing the data recorded in the recording layer onto a substrate and reproduces the data by setting a proper reproducing laser power upon reproduction. According to the magnetooptic recording medium, magnetizing directions of a buffer area, a sector address area, and a gap area which are sandwiched between data areas in which the data is recorded are uniformly magnetized in the recording direction.

摘要翻译： 磁光记录介质至少具有用于记录数据的记录层和用于将记录在记录层中的数据再现到基板上的再现层，并且通过在再现时设置适当的再现激光功率来再现数据。 根据磁光记录介质，在记录数据的数据区域之间的缓冲区域，扇区地址区域和间隙区域的磁化方向在记录方向上均匀地磁化。

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：US5784353A

公开(公告)日：1998-07-21

申请号：US813294

申请日：1997-03-10

申请人： Tsutomu Matsui

发明人： Tsutomu Matsui

IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/0055 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B7/26 ,  G11B11/105

CPC分类号： G11B11/10523 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1398 ,  G11B7/268 ,  G11B7/0055 ,  G11B7/0908 ,  G11B7/0917

摘要： An optical disk initializing apparatus includes the first optical system having a gain waveguide laser, a collimator lens, diffraction gratings, and a 45.degree. mirror, the second optical system having a 680-nm red laser, a polarizing beam splitter, a collimator lens, and a .lambda./4 plate, a dichroic mirror, an objective lens, an optical sensor, a phase compensator, a voltage-current conversion amplifier, and an objective lens actuator. The first optical system outputs a first beam for initialization. The second optical system outputs a second beam having a wavelength different from that of the first beam. The dichroic mirror multiplexes the beam emerging from the first optical system and the second beam emerging from the second optical system. The objective lens focuses an output beam emerging from the dichroic mirror on a phase change recording or magneto-optical recording optical disk. The optical sensor detects a focusing error signal from a return beam of the second beam reflected by the optical disk. The phase compensator, the voltage-current conversion amplifier, and the objective lens actuator focus the objective lens in accordance with the focusing error signal output from the optical sensor.

摘要翻译： 光盘初始化装置包括具有增益波导激光器的第一光学系统，准直透镜，衍射光栅和45°反射镜，第二光学系统具有680nm红色激光，偏振分束器，准直透镜， 和λ/ 4板，分色镜，物镜，光学传感器，相位补偿器，电压 - 电流转换放大器和物镜驱动器。 第一光学系统输出用于初始化的第一光束。 第二光学系统输出具有与第一光束不同的波长的第二光束。 分色镜复用从第一光学系统出射的光束和从第二光学系统出射的第二光束。 物镜将从分色镜出射的输出光束聚焦在相变记录或磁光记录光盘上。 光学传感器检测来自由光盘反射的第二光束的返回光束的聚焦误差信号。 相位补偿器，电压 - 电流转换放大器和物镜致动器根据从光学传感器输出的聚焦误差信号对物镜进行聚焦。

公开(公告)号：US5590099A

公开(公告)日：1996-12-31

申请号：US570471

申请日：1995-12-11

申请人： Giichi Shibuya ,  Masanori Shibahara ,  Suguru Takayama ,  Hajime Utsunomiya

发明人： Giichi Shibuya ,  Masanori Shibahara ,  Suguru Takayama ,  Hajime Utsunomiya

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B19/00 ,  G11B19/02 ,  G11B19/20 ,  G11B11/00 ,  G11B13/00

CPC分类号： G11B11/10506 ,  G11B11/10595 ,  G11B19/00 ,  G11B19/02 ,  G11B19/20 ,  G11B11/10508 ,  G11B11/10523

摘要： In a magneto-optical recording disc of the magnetic field modulation recording mode, recording of information for the first time is carried out in an optical modulation mode at a linear velocity which is higher than a reading linear velocity. The time required for recording is reduced while the recorded disc produces satisfactory outputs on playback.

摘要翻译： 在磁场调制记录模式的磁光记录盘中，以比读取线速度高的线速度在光调制模式中进行第一次的信息记录。 记录所需的时间减少，而录制的光盘播放时会产生令人满意的输出。