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    Magnetooptical recording medium allowing overwriting with two or more magnetic layers
    1.
    发明授权
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers 失效
    允许使用两个或多个磁性层重写的磁光记录介质和利用该磁光记录介质的记录方法

    公开(公告)号：US6028824A

    公开(公告)日：2000-02-22

    申请号：US80215

    申请日：1998-05-18

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

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

    CPC分类号： G11B11/10519 ,  G11B11/10591 ,  G11B11/10506

    摘要： A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 具有第一磁性层和具有比第一磁性层更高的居里点和较低的矫顽力并与第一磁性层交换耦合的第二磁性层的磁光记录介质满足以下关系：其中HH是矫顽力 第一磁性层; HL是第二磁性层的矫顽力; Ms是第二磁性层的饱和磁化强度; h是其厚度; σw是第一和第二磁性层之间的磁壁能量。

    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same
    3.
    发明授权
    Magnetooptical recording medium allowing overwriting with two or more magnetic layers and recording method utilizing the same 失效
    允许使用两个或多个磁性层重写的磁光记录介质和利用该磁光记录介质的记录方法

    公开(公告)号：US5481410A

    公开(公告)日：1996-01-02

    申请号：US312930

    申请日：1994-09-30

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    IPC分类号： G11B11/105 ,  G11B13/04

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591 ,  Y10T428/26

    摘要： A magnetooptical recording medium is provided with a transparent substrate, a first magnetic layer, a second magnetic layer having a higher Curie point and a lower coercive force than those of the first magnetic layer and being exchange coupled with the first magnetic layer. The medium further includes a third magnetic layer located between the first and second magnetic layers, so that the first magnetic layer is closer to the transparent substrate than the second and third magnetic layers and the third magnetic layer is closer to the transparent substrate than the second magnetic layer. Also disclosed is a process for recording on such a medium.

    摘要翻译： 磁光记录介质设置有透明基板，第一磁性层，具有比第一磁性层更高的居里点和更低的矫顽力的第二磁性层，并与第一磁性层交换耦合。 所述介质还包括位于所述第一和第二磁性层之间的第三磁性层，使得所述第一磁性层比所述第二和第三磁性层更靠近所述透明基板，并且所述第三磁性层比所述第二磁性层更靠近所述透明基板 磁性层。 还公开了在这种介质上进行记录的过程。

    Method for producing a magnetooptical recording medium
    4.
    发明授权
    Method for producing a magnetooptical recording medium 失效
    磁光记录介质的制造方法

    公开(公告)号：US5525378A

    公开(公告)日：1996-06-11

    申请号：US296163

    申请日：1994-08-26

    申请人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    发明人： Yoichi Osato ,  Hisaaki Kawade ,  Eiichi Fujii ,  Nobuhiro Kasama ,  Tadashi Kobayashi

    IPC分类号： G11B11/105 ,  H05H1/00

    CPC分类号： G11B11/10506 ,  G11B11/10519 ,  G11B11/10586 ,  G11B11/10591 ,  Y10T428/26

    摘要： A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.

    摘要翻译： 具有第一磁性层和具有比第一磁性层更高的居里点和较低的矫顽力并与第一磁性层交换耦合的第二磁性层的磁光记录介质满足以下关系：其中HH是 第一磁性层的矫顽力; HL是第二磁性层的矫顽力; Ms是第二磁性层的饱和磁化强度; h是其厚度; σw是第一和第二磁性层之间的磁壁能量。

    Information recording apparatus, information recording method, information playback apparatus, and information playback method
    6.
    发明授权
    Information recording apparatus, information recording method, information playback apparatus, and information playback method 有权
    信息记录装置，信息记录方法，信息重放装置和信息重放方法

    公开(公告)号：US07808869B2

    公开(公告)日：2010-10-05

    申请号：US12048142

    申请日：2008-03-13

    申请人： Tadashi Kobayashi

    发明人： Tadashi Kobayashi

    IPC分类号： G11B7/00

    CPC分类号： G11B19/122 ,  G11B7/00736

    摘要： According to one embodiment, an information recording apparatus which records content compliant with a second DVD standard on an information storage medium, the second DVD standard being a DVD standard later than a first DVD standard defined for a first image quality and being defined for a second image quality higher than the first image quality, includes a determination unit configured to determine whether narrow burst cutting area (NBCA) of the information storage medium is valid or not, and whether supported maximum recording speed of the information storage medium is triple speed or more of a predetermined recording speed, and a recording unit configured to perform real-time recording of the content compliant with the second standard on the information storage medium on the basis of the determination.

    摘要翻译： 根据一个实施例，一种信息记录装置，其将符合第二DVD标准的内容记录在信息存储介质上，所述第二DVD标准是比为第一图像质量定义的第一DVD标准晚的DVD标准，并且被定义为第二DVD标准 具有高于第一图像质量的图像质量，包括确定单元，其被配置为确定信息存储介质的窄突发切割区域（NBCA）是否有效，以及信息存储介质的支持的最大记录速度是否为三倍以上 以及记录单元，其被配置为基于所述确定在所述信息存储介质上执行符合所述第二标准的内容的实时记录。

    INFORMATION RECORDING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION PLAYBACK APPARATUS, AND INFORMATION PLAYBACK METHOD
    7.
    发明申请
    INFORMATION RECORDING APPARATUS, INFORMATION RECORDING METHOD, INFORMATION PLAYBACK APPARATUS, AND INFORMATION PLAYBACK METHOD 有权
    信息记录装置，信息记录方法，信息回放装置和信息回放方法

    公开(公告)号：US20080267028A1

    公开(公告)日：2008-10-30

    申请号：US12048142

    申请日：2008-03-13

    申请人： Tadashi Kobayashi

    发明人： Tadashi Kobayashi

    IPC分类号： G11B19/04

    CPC分类号： G11B19/122 ,  G11B7/00736

    摘要： According to one embodiment, an information recording apparatus which records content compliant with a second DVD standard on an information storage medium, the second DVD standard being a DVD standard later than a first DVD standard defined for a first image quality and being defined for a second image quality higher than the first image quality, includes a determination unit configured to determine whether narrow burst cutting area (NBCA) of the information storage medium is valid or not, and whether supported maximum recording speed of the information storage medium is triple speed or more of a predetermined recording speed, and a recording unit configured to perform real-time recording of the content compliant with the second standard on the information storage medium on the basis of the determination.

    摘要翻译： 根据一个实施例，一种信息记录装置，其将符合第二DVD标准的内容记录在信息存储介质上，所述第二DVD标准是比为第一图像质量定义的第一DVD标准晚的DVD标准，并且被定义为第二DVD标准 具有高于第一图像质量的图像质量，包括确定单元，其被配置为确定信息存储介质的窄突发切割区域（NBCA）是否有效，以及信息存储介质的支持的最大记录速度是否为三倍以上 以及记录单元，其被配置为基于所述确定在所述信息存储介质上执行符合所述第二标准的内容的实时记录。

    Optical disc, optical disc recording/reproducing apparatus, and optical disc recording/reproducing method
    9.
    发明授权
    Optical disc, optical disc recording/reproducing apparatus, and optical disc recording/reproducing method 有权
    光盘，光盘记录/再现装置和光盘记录/再现方法

    公开(公告)号：US07317678B2

    公开(公告)日：2008-01-08

    申请号：US11448796

    申请日：2006-06-08

    申请人： Tadashi Kobayashi

    发明人： Tadashi Kobayashi

    IPC分类号： G11B7/24 ,  G11B5/09

    CPC分类号： G11B7/00736 ,  G11B7/00456 ,  G11B7/0053 ,  G11B7/0062 ,  G11B7/1267

    摘要： In an optical disc in/from which data is recorded or reproduced by irradiating a storage area on the optical disc with a laser, information containing recording velocity information (RVI) for recording/reproduction, which represents a linear velocity different from the standard linear velocity, and write strategy information (WSI) corresponding to the recording velocity information is stored in a land pre-pit or the like on the optical disc.

    摘要翻译： 在通过用激光照射光盘上的存储区域来记录或再现数据的光盘中，包含用于记录/再现的记录速度信息（RVI）的信息，其表示与标准线速度不同的线速度 ，并且将与记录速度信息相对应的写入策略信息（WSI）存储在光盘上的陆地预制凹坑等中。