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    • 1. 发明授权
    • Method of recording information on and reproducing information from
magneto-optical recording medium
    • 在磁光记录介质上记录和再现信息的方法
    • US5283770A
    • 1994-02-01
    • US956047
    • 1992-10-02
    • Isamu NakaoMasahiko Kaneko
    • Isamu NakaoMasahiko Kaneko
    • G11B11/10G11B11/105G11B11/00G11B5/02
    • G11B11/10584G11B11/10506G11B11/10515
    • A magneto-optical recording medium has a multi-layer magnetic film comprising at least a reproducing layer, a memory layer, and a recording layer which are successively deposited in magnetically coupled relationship to each other. Information is recorded on the magneto-optical recording medium selectively in a first state in which the reproducing layer and the memory layer are magnetized by copying a magnetized condition of the recording layer, with a intensity-modulated light beam of a low intensity applied to the magneto-optical recording medium, or a second state in which the reproducing layer, the memory layer, and the recording layer are magnetized by an external recording magnetic field, with a intensity-modulated light beam of a high intensity applied to the magneto-optical recording medium. Recorded information is reproduced from the magneto-optical recording medium by copying the information from the memory layer to the reproducing layer in a limited high-temperature region which is produced due to a temperature distribution within a spot of a reproducing light beam applied to the magneto-optical recording medium.
    • 磁光记录介质具有至少包括以磁耦合关系彼此沉积的再现层,存储层和记录层的多层磁性膜。 信息被选择性地记录在第一状态中,其中再现层和存储层通过复制记录层的磁化条件而被磁化,其中强度调制的低强度光束施加到 磁光记录介质或其中再现层,存储层和记录层被外部记录磁场磁化的第二状态,其中强度调制的光束被施加到磁光学 记录介质。 通过将信息从存储层复制到再现层,在由限制的高温区域中复制记录的信息,该有限的高温区由于在施加到磁光的再现光束的一个点内的温度分布而产生 光学记录介质。
    • 2. 发明授权
    • Method of fabricating a high-density magnetooptic recording medium
    • 制造高密度磁光记录介质的方法
    • US5230930A
    • 1993-07-27
    • US832575
    • 1992-02-07
    • Katsuhisa ArataniMasahiko KanekoMasumi OhtaIsamu Nakao
    • Katsuhisa ArataniMasahiko KanekoMasumi OhtaIsamu Nakao
    • G11B11/10G11B11/105
    • G11B11/10582
    • A method of fabricating a magnetooptic recording medium (10) having at least a reproducing layer (11) and a recording layer (13), from which information is read out by changing the state of magnetization of the reproducing layer (11) comprises steps of forming the reproducing layer (11) on a substrate (21), putting a high-density magnetic recording medium (30) storing information in a high-density magnetic pattern into close contact with the reproducing layer (11) to copy the high-density magnetic pattern formed on the high-density magnetic recording medium (30) into the reproducing layer (11), and forming the recording layer (13) over the reproducing layer (11) after copying the high-density magnetic pattern into the reproducing layer, to copy the high-density magnetic pattern into the recording layer (13).
    • 一种制造具有至少再现层(11)和记录层(13)的磁光记录介质(10)的方法,通过改变再现层(11)的磁化状态从中读出信息,包括步骤: 在基板(21)上形成再现层(11),将存储高密度磁图案的信息的高密度磁记录介质(30)与再现层(11)紧密接触,以将高密度 在高密度磁记录介质(30)上形成到再现层(11)中的磁图案,以及在将高密度磁图案复制到再现层中之后,在再现层(11)上形成记录层(13) 以将高密度磁图案复制到记录层(13)中。
    • 5. 再颁专利
    • Multilayer optical disk
    • 多层光盘
    • USRE40136E1
    • 2008-03-04
    • US11091006
    • 2005-03-25
    • Masahiko KanekoNobuhiko UmezuKatsuhisa ArataniAriyoshi Nakaoki
    • Masahiko KanekoNobuhiko UmezuKatsuhisa ArataniAriyoshi Nakaoki
    • B32B3/02
    • G11B7/244G11B7/24G11B7/2531G11B7/2534G11B7/257G11B7/258G11B7/2585G11B2007/2571G11B2007/25713Y10T428/21
    • A multilayer optical disk having an information storage layer which can as well as be reproduced by a general purpose reproducing apparatus, for example, a compact disk player, and from which information can be read from other information storage layers by using an exclusive reproducing apparatus. The method of manufacturing a multilayer disk comprises the steps of forming a first substrate having a first information storage area enabling reproduction of information therein with a first light beam having a wavelength of 770 nm to 830 nm; forming a second substrate having a second information storage area enabling reproduction of information therein with a second light beam having a wavelength of 615-655 nm but which is relatively transparent with respect to said first light beam; and bonding said first substrate to said second substrate together without said first and second said information areas facing each other.
    • 具有信息存储层的多层光盘,其可以由通用再现装置(例如,光盘播放器)再现,并且可以通过使用专用再现装置从其它信息存储层读取信息。 制造多层盘的方法包括以下步骤:形成具有第一信息存储区域的第一基板,该第一信息存储区域能够利用波长为770nm至830nm的第一光束再现其中的信息; 形成具有第二信息存储区域的第二基板,所述第二信息存储区域能够利用波长为615-655nm但相对于所述第一光束相对透明的第二光束再现信息; 以及将所述第一基板与所述第二基板结合在一起,而所述第一和第二信息区域彼此面对。
    • 9. 发明授权
    • Thermomagnetic recording and reproducing system
    • US4612587A
    • 1986-09-16
    • US643976
    • 1984-08-20
    • Masahiko KanekoHitoshi Tamada
    • Masahiko KanekoHitoshi Tamada
    • G02F3/00G11B11/105G11B5/02G11B5/09G11B11/00G11B11/10
    • G11B11/10506G02F3/00G11B11/10515G11B11/10536G11B11/10589
    • A thermomagnetic recording and reproducing system for use in optical magnetic disc apparatus wherein at least a first layer (1) of soft magnetic material having an easy axis of magnetization normal to the layer surface, a transparent non-magnetic intermediate layer (2), a second layer (3) of soft magnetic material having an easy axis of magnetization normal to the layer surface and a metal film or semi-metal film (4) adjacent to the second magnetized layer are superposed on one another to form a recording medium (5). In recording, a bias magnetic field is applied to the first and second magnetized layers (1) and (3) so that the magnetized layers are magnetized to have a single magnetic domain over their whole surfaces and a magnetization directed perpendicular to the layer surface. Then, a light pulse having a first wavelength of, for example, a relatively short wavelength and of which optical absorptance in the magnetized layer is relatively high is made incident on the single magnetic domain of the first magnetized film (1) to form a cylindrical magnetic domain magnetized in the direction opposite to the magnetization direction by the applied bias magnetic field, thereby recording information bits on the first magnetized layer (1). A light pulse having a second wavelength of, for example, a relatively long wavelength which passes through the first and second magnetized layers (1) and (3) is made incident on the single magnetic domain of the second magnetized layer (3) to form a cylindrical magnetic domain magnetized in the direction opposite to the magnetization direction by the applied bias magnetic field. The information is read out from the medium (5) on which the recording was made as above by utilizing the magneto optic effect.