公开(公告)号：US06377526B1

公开(公告)日：2002-04-23

申请号：US09283050

申请日：1999-04-01

申请人： Richard C. Vining ,  Kent Macleod

发明人： Richard C. Vining ,  Kent Macleod

IPC分类号： G11B700

CPC分类号： G11B20/1252 ,  G11B7/0037 ,  G11B7/0055 ,  G11B7/006 ,  G11B11/10519 ,  G11B11/10595 ,  G11B19/12 ,  G11B27/329 ,  G11B2020/1232 ,  G11B2020/1267 ,  G11B2020/1285 ,  G11B2220/218

摘要： A method for selectively enabling writing of data multiple times onto a write-once read-many optical disk by a host system, the disk having a disk type indicator, and each sector having a SWF field and a flag field and user data, wherein new data bits replace existing data bits in a one-for-one ratio without mapping, comprising the steps of: reading a disk type indicator; setting a firmware flag allowing writing to the disk if the disk type is erasable WORM; receiving a write command from the host system, the command specifying a sector to write to; reading the contents of the disk SWF and flag fields for the sector; overwriting all user data on the sector with all zeroes if the firmware flag is set; replacing every user data bit in the sector with a zero in a one-for-one ratio without mapping; and resetting the contents of the disk SWF and flag fields to indicate the sector is available for writing. Apparatus for selectively enabling writing of data multiple times onto a write-once read-many optical disk by a host system, the disk having a disk type indicator, and each sector having a SWF field and a flag field and user data, wherein new data bits replace existing data bits in a one-for-one ratio without mapping, comprising an optical disk drive having: a spindle motor rotating an optical disk; an optical assembly/laser generating a laser beam adapted to heat a minute region on the optical disk; a bias magnet affecting the polarity of the heated region; a write/read channel driving the optical assembly/laser and bias magnet; a write/read controller adapted to process a unique erase command and thereby controlling the optical assembly/laser and bias magnet to write every user data bit of a sector to zero in a one-for-one ratio without mapping; and a small computer system interface receiving write commands from a host system.

摘要翻译： 一种用于选择性地允许数据由主机系统多次写入一次写入许多光盘的方法，该盘具有盘类型指示符，并且每个扇区具有SWF字段和标志字段以及用户数据，其中新 数据位以一比一的比例替换现有的数据位而不进行映射，包括以下步骤：读取磁盘类型指示符; 设置固件标志，如果磁盘类型为可擦除WORM，则允许写入磁盘; 从主机系统接收写入命令，该命令指定要写入的扇区; 读取磁盘SWF的内容和扇区的标志字段; 如果设置了固件标志，则覆盖扇区上的所有用户数据全为零; 以一比一的比例替换扇区中的每个用户数据位，而不进行映射; 并重置磁盘SWF的内容和标志字段以指示扇区可用于写入。 用于选择性地允许由主机系统将数据多次写入到一次写入许可光盘上的装置，该盘具有盘类型指示符，并且每个扇区具有SWF字段和标志字段以及用户数据，其中新数据 比特替换现有数据比例，而不进行映射，包括具有：主轴电机旋转光盘的光盘驱动器; 产生适于加热光盘上的微小区域的激光束的光学组件/激光器; 影响加热区域极性的偏置磁体; 驱动光学组件/激光器和偏置磁体的写入/读取通道; 写入/读取控制器，其适于处理唯一的擦除命令，从而控制光学组件/激光器和偏置磁体，以一比一的比例将扇区的每个用户数据位写入零，而不进行映射; 以及从主机系统接收写命令的小型计算机系统接口。

公开(公告)号：US5787056A

公开(公告)日：1998-07-28

申请号：US766015

申请日：1996-12-13

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

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

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

CPC分类号： G11B11/10584 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10506

摘要： If the Curie points of the first magnetic layer, second magnetic layer, third magnetic layer and fourth magnetic layer of alloys of rare-earth metal and transition metal as ferrimagnetic materials showing perpendicular magnetization from room temperature to their Curie points are indicated as Tc1, Tc2, Tc3 and Tc4, respectively, the Curie points and room temperature are related by: room temperature

摘要翻译： 如果作为铁氧体材料的稀土金属和过渡金属的合金的第一磁性层，第二磁性层，第三磁性层和第四磁性层的居里点显示出从室温到居里点的垂直磁化率，表示为Tc1，Tc2 ，Tc3和Tc4，居里点和室温分别与室温

公开(公告)号：US5680373A

公开(公告)日：1997-10-21

申请号：US370360

申请日：1995-01-09

申请人： Masatoshi Sato ,  Jun Saito ,  Hideki Akasaka

发明人： Masatoshi Sato ,  Jun Saito ,  Hideki Akasaka

IPC分类号： G11B11/105 ,  G11B11/00

CPC分类号： G11B11/105 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10519 ,  G11B11/10521 ,  G11B11/10586

摘要： In a magnetooptical reproducing apparatus and method, data recorded in a first layer of a magnetooptical recording medium is transcribed to a second layer by a reproduction magnetic field and is optically reproduced from the second layer.

摘要翻译： 在磁光再现装置和方法中，记录在磁光记录介质的第一层中的数据通过再现磁场转录到第二层，并从第二层被光学再现。

公开(公告)号：US5458987A

公开(公告)日：1995-10-17

申请号：US91904

申请日：1993-07-16

申请人： Masatoshi Sato ,  Jun Saito ,  Hideki Akasaka

发明人： Masatoshi Sato ,  Jun Saito ,  Hideki Akasaka

IPC分类号： G11B11/105 ,  G11B5/66

CPC分类号： G11B11/10519 ,  G11B11/105 ,  G11B11/10506 ,  G11B11/10521 ,  G11B11/10586 ,  Y10S428/90 ,  Y10S430/146 ,  Y10T428/12493 ,  Y10T428/12771 ,  Y10T428/12861 ,  Y10T428/12951

摘要： A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical recording medium comprises the steps of using, as the medium, a multilayered magnetic recording medium consisting of a first layer having a perpendicular magnetic anisotropy acting as a recording layer, and a second layer having a perpendicular magnetic anisotropy acting as a reference layer; moving the medium; applying an initial field so that, before recording, the direction of magnetization of the recording layer is left unchanged, and that of the reference layer is aligned either upward or downward; radiating a laser beam onto the medium; pulse modulating an intensity of the laser beam in accordance with binary data to be recorded; when the laser beam is radiated, applying a bias field to the irradiated portion; and when the intensity of the pulse-modulated laser beam is at high level, forming one of the bit having upward-magnetization and that having downward-magnetization, and when the intensity of the pulse-modulated laser beam is at low level, forming the other bit.

摘要翻译： 使用具有向上磁化的位和在磁光记录介质的记录层上具有向下磁化的位的数据记录数据的磁光记录方法包括以下步骤：使用由第一层构成的多层磁记录介质 具有作为记录层的垂直磁各向异性，和具有作为参考层的垂直磁各向异性的第二层; 移动媒体; 施加初始场，使得在记录之前，记录层的磁化方向保持不变，并且参考层的磁化方向向上或向下排列; 将激光束照射到介质上; 根据要记录的二进制数据对激光束的强度进行脉冲调制; 当激光束被照射时，向照射部分施加偏置场; 并且当脉冲调制激光束的强度处于高电平时，形成具有向上磁化并具有向下磁化的位之一，并且当脉冲调制激光束的强度处于低电平时，形成 其他位

公开(公告)号：US5420836A

公开(公告)日：1995-05-30

申请号：US948452

申请日：1992-09-21

申请人： Hajime Machida

发明人： Hajime Machida

IPC分类号： C09D5/23 ,  G11B11/105 ,  G11B13/04 ,  G11B11/10 ,  G11B11/12

CPC分类号： G11B11/10586 ,  G11B11/10519

摘要： A method of magneto-optical recording and overwriting information onto a double-layer magneto-optical recording medium which has laminated first and second magnetic layers having different coercive forces at a lower operation temperature and a higher operation temperature of which one is a recording operation temperature and the other is an erasing operation temperature, without using an initializing external magnetic field. The method includes the steps of recording by applying a laser beam to an area of the recording medium at a power level corresponding to one of these operating temperatures and erasing by applying a laser beam to an area of the recording medium at a different power level corresponding to the other of the operating temperatures, while applying a bias magnetic field to the magneto-optical recording medium with the same magnetization direction during both recording and erasing, the intensity of the bias magnetic field being greater than the coercive forces of the first and second magnetic layers at the lower operation temperature.

摘要翻译： 一种在双层磁光记录介质上磁光记录和重写信息的方法，其具有在较低操作温度下具有不同矫顽力的层压的第一和第二磁性层，以及较高的操作温度，其中一个是记录操作温度 另一种是擦除操作温度，而不使用初始化外部磁场。 该方法包括以对应于这些操作温度之一的功率电平将激光束施加到记录介质的区域并通过以对应于不同功率电平施加激光束到记录介质的区域来擦除的步骤 在另一个操作温度下，同时在记录和擦除期间以相同的磁化方向对磁光记录介质施加偏置磁场，偏磁场的强度大于第一和第二磁场的矫顽力 磁性层在较低的工作温度。

公开(公告)号：US5357493A

公开(公告)日：1994-10-18

申请号：US933771

申请日：1992-08-24

申请人： Yukinori Okazaki ,  Mieko Kobukata

发明人： Yukinori Okazaki ,  Mieko Kobukata

IPC分类号： G11B11/105 ,  G11B13/04

CPC分类号： G11B11/10519 ,  G11B11/10536

摘要： In a magneto-optic memory device for recording information on a magneto-optic recording medium having a magneto-optic recording film irradiated by a first small diameter light spot and a second larger diameter light spot which is substantially concentric with the first light spot, the temperature of a portion of the recording film around a recording position is changed by the irradiation of the second light spot in accordance with an information signal to be recorded, between a temperature, which is lower than a compensation temperature of the recording film and produces spontaneous magnetization of the recording film having intensity necessary for recording information, and a temperature which is higher than the compensation temperature of the recording film and produces spontaneous magnetization of the recording film having intensity necessary for recording information, and the intensity of the first light spot is increased to raise the temperature of the recording position of the recording film so as to reach near the Curie temperature of the recording film, thereby erasing old information and recording new information at the same time.

摘要翻译： 在用于在具有由第一小直径光点照射的磁光记录膜和与第一光斑基本同心的第二较大直径光点的磁光记录介质上记录信息的磁光存储器件中， 记录膜周围记录位置的一部分的温度根据要记录的信息信号在第二光点的照射之间在低于记录膜的补偿温度的温度之间改变，并产生自发的 具有记录信息所需的强度的记录膜的磁化和高于记录膜的补偿温度的温度，并且产生具有记录信息所需的强度的记录膜的自发磁化，并且第一光点的强度是 增加以提高记录位置的温度 以便达到接近记录膜的居里温度，从而同时擦除旧信息并记录新信息。

公开(公告)号：US5343449A

公开(公告)日：1994-08-30

申请号：US128766

申请日：1993-09-17

申请人： Kazutomo Miyata

发明人： Kazutomo Miyata

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

CPC分类号： G11B11/10519 ,  G11B11/10586

摘要： A medium comprises a reading layer, a memory layer and a writing layer. The reading layer, the memory layer and the writing layer are exchange-coupled to each other to form a three-layered structure. The medium satisfies the following condition at room temperature and during reproduction:i) 2M.sub.SR H.sub.CR t.sub.R .sigma..sub.W12 ;iii) Hb

摘要翻译： 介质包括读取层，存储层和写入层。 读取层，存储层和写入层彼此交换耦合以形成三层结构。 介质在室温和再生期间满足以下条件：i）2MSRHCRtR sigma W12; iii）Hb <（sigma WR1 / 2MSRtR）+ HCR，其中tR是读取层的膜厚度，t1是存储层的膜厚度，MSR是读取层的饱和磁化强度，MS1是存储器的饱和磁化强度 HCR是读取层的矫顽力，HC1是存储层的矫顽力，sigma WR1是读取层和存储层之间的交换耦合力，σW12是存储层与写入之间的交换耦合力 层，Hb是记录磁场。

公开(公告)号：US5014252A

公开(公告)日：1991-05-07

申请号：US570978

申请日：1990-08-22

申请人： Hideki Akasaka ,  Masatoshi Sato

发明人： Hideki Akasaka ,  Masatoshi Sato

IPC分类号： G11B11/105

CPC分类号： G11B11/10586 ,  G11B11/10506 ,  G11B11/10519

摘要： A magnetooptical recording method for recording data using a bit having upward-magnetization and a bit having downward-magnetization on a recording layer of a magnetooptical-recording medium comprises the steps of using, as the medium, a multilayered magnetic recording medium consisting of a first layer having a perpendicular magnetic anisotropy acting as a recording layer, and a second layer having a perpendicular magnetic anisotropy acting as a reference layer; moving the medium; applying an initial field so that, before recording, the direction of magnetization of the recording layer is left unchanged and that of the reference layer is aligned either upward or downward; radiating two adjacent laser beams, i.e., a leading beam and a trailing beam onto the medium; the leading beam being an erasing beam of low level which is not modulated in principle; the trailing beam is a writing beam which is pulse modulated between high level and basis level in accordance with binary data to be recorded; and the basis level being able to have an intensity equal to or lower than the low level and to be zero level; when the trailing laser beam is radiated, applying a bias field to the irradiated portion; and when the intensity of the pulse-modulated laser beam is at high level, forming one of the bit having upward-magnetization, and when the leading low-level laser beam is radiated, forming the other bit.

摘要翻译： 使用具有向上磁化的位和在磁光记录介质的记录层上具有向下磁化的位的数据记录数据的磁光记录方法包括以下步骤：将作为介质的多层磁记录介质用作第一 具有作为记录层的垂直磁各向异性的层和具有作为参考层的垂直磁各向异性的第二层; 移动媒体; 施加初始场，使得在记录之前，记录层的磁化方向保持不变，并且参考层的磁化方向向上或向下排列; 将两个相邻的激光束，即前导光束和后向光束照射到介质上; 前导光束是原则上未调制的低电平擦除光束; 拖尾光束是根据要记录的二进制数据在高电平和基准电平之间进行脉冲调制的写入光束; 并且基准能够具有等于或低于低水平的强度并且为零水平; 当后向激光束被照射时，向照射部分施加偏置场; 并且当脉冲调制激光束的强度处于高电平时，形成具有向上磁化的位之一，并且当引导低级激光束被辐射时，形成另一位。

公开(公告)号：US4993011A

公开(公告)日：1991-02-12

申请号：US425503

申请日：1989-10-20

申请人： Kenji Torazawa ,  Satoshi Sumi ,  Seiji Murata ,  Shigekazu Minechika

发明人： Kenji Torazawa ,  Satoshi Sumi ,  Seiji Murata ,  Shigekazu Minechika

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/08 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B11/105

CPC分类号： G11B11/10597 ,  G11B11/10519 ,  G11B11/10532 ,  G11B11/10576 ,  G11B7/0045 ,  G11B7/08 ,  G11B7/125 ,  G11B7/131 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/0909

摘要： An erasing beam B1 and a recording beam B2 emitted from a laser diode array 20 are focused on different tracks of a optical magnetic disk D, the erasing beam B1 being focused on a track located ahead of a track on which the recording beam B2 is focused. The reflected beams of the erasing beam B1 and the recording beam B2 are separated respectively into two polarized components by means of a polarized beam splitter 17 and the polarized components are received by photo sensor means 23 and 24. Based on outputs of the photo sensor means 23 and 24, an address signal, a focus error signal and a tracking error signal are obtained. At the time of reproduction, the laser diode array 20 emits a reproducing beam so that the photo sensor means provide a reproducing signal.

摘要翻译： 从激光二极管阵列20发射的擦除光束B1和记录光束B2聚焦在光盘D的不同轨道上，擦除光束B1被聚焦在位于记录光束B2聚焦的光道前方的光道上 。 擦除光束B1和记录光束B2的反射光束通过偏振光束分离器17分别分离成两个偏振分量，并且偏振分量被光传感器装置23和24接收。基于光传感器装置 23和24，获得地址信号，聚焦误差信号和跟踪误差信号。 在再现时，激光二极管阵列20发射再现光束，使得光传感器装置提供再现信号。

公开(公告)号：US5679474A

公开(公告)日：1997-10-21

申请号：US479831

申请日：1995-06-07

申请人： Tsutomu Shiratori

发明人： Tsutomu Shiratori

IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B5/66 ,  G11B13/00 ,  G11C13/06

CPC分类号： G11B11/10591 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10582 ,  G11B11/10584 ,  Y10S428/90 ,  Y10S430/146

摘要： A magneto-optical recording medium with wide operating margins is disclosed. The magneto-optical recording medium includes a vertical magnetic films of exchange-coupled liminated structure composed of a first magnetic layer with a high coercive force H.sub.H and a low Curie temperature T.sub.L and a second magnetic layer with a lower coercive force H.sub.L and a higher Curie temperature T.sub.H in comparison with those of the first magnetic layer. The first magnetic layer has a gradient of the Curie temperature along the direction of thickness of the layer so that the Curie temperature is higher at a position closer to the second magnetic layer. The recording method utilizing the recording medium according to the present invention is also disclosed.

摘要翻译： 公开了具有宽操作裕度的磁光记录介质。 磁光记录介质包括由矫顽力高的第一磁性层HH和低居里温度TL组成的交换耦合限制结构的垂直磁性膜和具有较低矫顽磁力的第二磁性层和较高的居里 温度TH与第一磁性层相比较。 第一磁性层沿着层的厚度方向具有居里温度的梯度，使得靠近第二磁性层的位置的居里温度较高。 还公开了利用根据本发明的记录介质的记录方法。