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    • 3. 发明授权
    • Magneto-optical recording medium
    • 磁光记录介质
    • US5644566A
    • 1997-07-01
    • US432683
    • 1995-05-02
    • Junichiro NakayamaMichinobu MiedaHiroyuki KatayamaJunji HirokaneAkira TakahashiKenji Ohta
    • Junichiro NakayamaMichinobu MiedaHiroyuki KatayamaJunji HirokaneAkira TakahashiKenji Ohta
    • G11B11/105G11B7/00
    • G11B11/10586G11B11/10517
    • An intermediate layer is formed between a memory layer and a writing layer. The intermediate layer shows in-plane magnetization at room temperature, and perpendicular magnetization within a temperature range within which the coercive force of the memory layer is lower than that of the writing layer. The Curie point of the intermediate layer is lower than that of the memory layer. Like a conventional method, light-intensity modulation overwriting is performed by irradiating laser light whose intensity has been modulated between high level and low level while applying a recording magnetic field after performing an initialization. Even when there are variations in the raised temperature by the irradiation of laser light of high level, it is possible to perform stable overwriting with light-intensity modulation by satisfactorily restraining the exchange forces between the intermediate layer and the writing layer from causing coupling.
    • 在存储层和写入层之间形成中间层。 中间层在室温下显示出平面内的磁化强度,在存储层的矫顽力低于书写层的温度范围内的垂直磁化强度。 中间层的居里点低于存储层的居里点。 像传统方法一样,通过在执行初始化之后照射记录磁场的同时照射强度已经被调制在高电平和低电平之间的激光来执行光强调制重写。 即使通过高水平的激光照射而升高的温度存在变化,也可以通过令人满意地抑制中间层与书写层之间的交换作用而进行光强调制来进行稳定的重写。
    • 4. 发明授权
    • Light modulation method for magneto-optical recording device
    • 磁光记录装置的光调制方法
    • US5422865A
    • 1995-06-06
    • US163355
    • 1993-12-07
    • Hiroyuki KatayamaJunji HirokaneJunichiro NakayamaAkira TakahashiKenji Ohta
    • Hiroyuki KatayamaJunji HirokaneJunichiro NakayamaAkira TakahashiKenji Ohta
    • G11B11/10G11B11/105G11B13/04
    • G11B11/10506G11B11/10521
    • A magneto-optical recording method includes the steps of applying an external magnetic field perpendicularly onto the magnetic thin film with perpendicular magnetization of a magneto-optical recording medium and projecting a light beam onto the magneto-optical recording medium; and modulating the intensity of the light beam between the first light intensity and the second light intensity in response to the information to be recorded while shifting a spot of the light beam, thereby recording information. In the above method, the first light intensity is set such that by reducing the coercive force of the magnetic thin film with perpendicular magnetization, a magnetic domain is formed on the magnetic thin film with perpendicular magnetization, and that the magnetic domain is moved as the spot of the light beam is shifted. The second light intensity is set such that by increasing the coercive force of the magnetic thin film with perpendicular magnetization, the magnetic domain is fixed to the position.
    • 磁光记录方法包括以下步骤:利用磁光记录介质的垂直磁化将磁场垂直地施加到磁性薄膜上并将光束投射到磁光记录介质上; 以及响应于要移动光束的点而要记录的信息,调制第一光强度和第二光强度之间的光束的强度,从而记录信息。 在上述方法中,第一光强度被设定为通过以垂直磁化强度降低磁性薄膜的矫顽力,在磁性薄膜上以垂直磁化形成磁畴,并且磁畴作为 光束的光斑被移动。 第二光强度被设定为通过以垂直磁化强度增加磁性薄膜的矫顽力,将磁畴固定在该位置上。
    • 5. 发明授权
    • Magneto-optical recording method of overwriting without requiring an
initialization magnet
    • 重写磁光记录方法,不需要初始化磁铁
    • US5402408A
    • 1995-03-28
    • US964428
    • 1992-10-21
    • Junji HirokaneHiroyuki KatayamaJunichiro NakayamaMichinobu MiedaKenji Ohta
    • Junji HirokaneHiroyuki KatayamaJunichiro NakayamaMichinobu MiedaKenji Ohta
    • G11B11/105G11B11/10G11B7/24
    • G11B11/10584G11B11/10506G11B11/10519G11B11/10586
    • A magneto-optical recording method for rewriting of information including the steps of projecting a light beam, whose intensity varies in response to information to be recorded, onto a magnetic thin film with perpendicular magnetization while an external magnetic field of a constant intensity is being applied thereto; and arranging the magnetization direction of an area irradiated with the light beam of the magnetic thin film with perpendicular magnetization in the direction of the external magnetic field when projecting the light beam of high intensity, while arranging it in the direction of demagnetizing field, opposite to the direction of the external magnetic field generated by magnetization in the vicinity of the irradiated area when projecting the light beam of low intensity, and a magneto-optical memory element provided with a base whereon the magnetic thin film with perpendicular magnetization and an in-plane magnetization film are formed. With the above arrangement, an overwriting operation can be carried out through light intensity modulation without requiring an initialization magnet.
    • 一种用于重写信息的磁光记录方法,包括以下步骤:将强度随着要记录的信息而变化的光束投射到具有恒定强度的外部磁场的垂直磁化的磁性薄膜上, 到; 以及当投射高强度光束时,沿着外部磁场的方向,使磁性薄膜的光束照射的区域的磁化方向排列成与退磁场相反的方向 当投射低强度光束时,在照射区域附近由磁化产生的外部磁场的方向以及设置有具有垂直磁化和平面内的磁性薄膜的基底的磁光存储元件 形成磁化膜。 通过上述配置,可以通过光强调制而不需要初始化磁体来进行重写操作。
    • 6. 发明授权
    • Method of manufacturing a master plate where its guide groove has an
inclined angle
    • 制造其导向槽具有倾斜角的主板的方法
    • US5347510A
    • 1994-09-13
    • US4266
    • 1993-01-14
    • Junji HirokaneHiroyuki KatayamaJunichiro NakayamaMichinobu MiedaKenji Ohta
    • Junji HirokaneHiroyuki KatayamaJunichiro NakayamaMichinobu MiedaKenji Ohta
    • G01Q80/00G11B7/007G11B7/24G11B7/26
    • G11B7/24076G11B7/261
    • A master plate for manufacturing a stamper for injecting molding of an optical memory device has a substrate having a plurality of guiding grooves on a surface thereof with a predetermined interval. The respective edge portions of the guiding grooves are inclined with respect to the surface of the substrate at an angle not more than 30.degree.. According to a manufacturing method of the master plate, the post-baking process is carried out at a baking temperature of not less than 150.degree. C. and an etching gas containing O.sub.2 gas of 4 (SCCM) to 10 (SCCM) is used. Thus, even when the copying is carried out with respect to the substrate of the optical memory device according to the injection molding process wherein the stamper, which is manufactured based on the above-mentioned master plate, is used, the mold release of the stamper can be carried out without being caught by the substrate. Thus, it is possible to keep the respective shapes of the guiding grooves of the s tamper, thereby enabling of manufacturing the substrate of the optical memory device with high repeatability.
    • 用于制造用于注射成型光学存储器件的压模的母板具有在其表面上以预定间隔具有多个导向槽的衬底。 引导槽的各个边缘部分相对于基板的表面以不大于30°的角度倾斜。 根据主板的制造方法,后烘烤处理在不低于150℃的烘烤温度下进行,并且使用含有4(SCCM)至10(SCCM)的O 2气体的蚀刻气体。 因此,即使在使用根据上述主板制造的压模的注射成型工艺相对于光学存储器件的基板进行复印时,压模的脱模 可以在不被基材捕获的情况下进行。 因此,可以保持篡改器的引导槽的各自的形状,从而能够以高重复性制造光学存储器件的基板。
    • 8. 发明授权
    • Optical recording element and driving system
    • 光学记录元件和驱动系统
    • US5459711A
    • 1995-10-17
    • US219253
    • 1994-03-29
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • Kenji OhtaTetsuya InuiHiroyuki KatayamaAkira TakahashiJunji HirokaneYukinori NishitaniMichinobu MiedaKazuo Van
    • G11B7/0045G11B7/013G11B7/09G11B7/125G11B7/24G11B7/24085G11B11/105G11B19/02G11B3/78
    • G11B7/0045G11B11/10528G11B11/10578G11B11/10595G11B19/02G11B7/0938G11B7/126G11B7/24G11B7/24085
    • An optical recording element comprising a recording medium which includes an information recording area formed at every unit in a non-continuous condition, the recording medium further including sample pits disposed at intervals of a fixed distance for providing basic information about the locations of the recording units in same track. Each sample pit comprises a plurality of pits disposed next to the sequence of the recording units so that the spacing between the pits differs from the spacing between the recording units. At least one of the plurality of pits is a long-sized inclined pit which is inclined at an angle in the range of 6.degree. to 80.degree. to a recording track. A driving system for driving the optical recording element for recording information in the non-continuous recording area or erasing information stored therein with a light beam the output of which is varied as required and checking whether said recording or erasing has been correctly performed, within a very short time in which the light beam passes through the non-continuous recording area. By using the optical recording element in combination with its driving system, the processing speed for reducing, erasing and verifying these functions can be greatly improved and the irradiating position of the light beam at every recording unit can be correctly controlled.
    • 一种光记录元件,包括记录介质,该记录介质包括在非连续状态下在每个单元处形成的信息记录区域,所述记录介质还包括以固定距离间隔设置的样品坑,以提供关于记录单元的位置的基本信息 在同一轨道。 每个采样坑包括靠近记录单元序列设置的多个凹坑,使得凹坑之间的间隔与记录单元之间的间隔不同。 多个凹坑中的至少一个是相对于记录轨道以6°至80°的角度倾斜的长尺寸倾斜凹坑。 一种驱动系统,用于驱动用于在非连续记录区域中记录信息的光学记录元件,或者用存储在其中的光束擦除信息,该光束的输出根据需要变化,并且检查是否正确地执行了所述记录或擦除 光束通过非连续记录区域的非常短的时间。 通过与其驱动系统结合使用光学记录元件,可以大大提高用于减少,擦除和验证这些功能的处理速度,并且可以正确地控制每个记录单元处的光束的照射位置。
    • 10. 发明授权
    • Photo-mask for use in manufacturing an optical memory disc, a method for
making the photo-mask and a method for manufacturing the optical memory
disc
    • 用于制造光存储盘的照相掩模,用于制造光掩模的方法和用于制造光存储盘的方法
    • US4839251A
    • 1989-06-13
    • US36426
    • 1987-04-09
    • Kenji OhtaAkira TakahashiTetsuya InuiJunji HirokaneHiroyuki Katayama
    • Kenji OhtaAkira TakahashiTetsuya InuiJunji HirokaneHiroyuki Katayama
    • G11B7/26
    • G11B7/261
    • A photo-mask for use in manufacturing an optical memory disc has a substrate having a disc shape and made of a transparent material, and a film deposited on the substrate and formed with a predetermined pattern of grooves extending spirally or concentrically to the center of the disc shaped substrate such as to leave a thin film at the bottom of the grooves, and a number of microscopic pits in the form of minute indentations with a predetermined spacing aligned along the grooves so as to substantially leave no film at the bottom of the indentations. Thus, a light which has passed through the thin film at grooves is weakened and a light which has passed through the indentations loses substantially no power, and a light applied elsewhere on the film is cut off. The photo-mask is made through the steps of depositing an opaque film on a substrate having a disc shape and made of a transparent material, impinging a first laser at places where the grooves are to be formed, and impinging a second laser at places where the pits are to be formed. The first laser is weaker in power than the second laser.
    • 用于制造光学存储盘的光掩模具有盘形状并由透明材料制成的基板,以及沉积在基板上并形成有螺旋状或同心地延伸到其中心的预定图案的凹槽的薄膜 盘形基板,例如在凹槽的底部留下薄膜,并且具有沿着凹槽对准的预定间隔的微小凹痕形式的多个微凹坑,以便在凹痕的底部基本上不留下薄膜 。 因此,通过凹槽处的薄膜的光被削弱,并且已经穿过凹痕的光基本上不会损失功率,并且切断在膜上其他地方施加的光。 光掩模是通过以下步骤制成的:通过在具有圆盘形状并由透明材料制成的衬底上沉积不透明膜,将第一激光照射到要形成凹槽的位置,并将第二激光照射在 坑将形成。 第一个激光器的功率比第二个激光器弱。