利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

254 条记录 (耗时 0.04 秒)

    Magneto-optic memory medium and a method for producing the same
    1.
    发明授权
    Magneto-optic memory medium and a method for producing the same 失效
    磁光存储介质及其制造方法

    公开(公告)号：US5643687A

    公开(公告)日：1997-07-01

    申请号：US358682

    申请日：1994-12-19

    申请人： Naoyasu Iketani ,  Hiroyuki Katayama ,  Junichiro Nakayama ,  Kenji Ohta

    发明人： Naoyasu Iketani ,  Hiroyuki Katayama ,  Junichiro Nakayama ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  G11B7/257 ,  G11B11/105 ,  G11B5/66

    CPC分类号： G11B7/2578 ,  G11B11/10582 ,  G11B11/10584 ,  G11B11/10593 ,  G11B7/252 ,  G11B2007/24306 ,  G11B2007/25706 ,  G11B2007/2571 ,  G11B2007/25713 ,  G11B2007/25715 ,  G11B2007/25718 ,  G11B7/2531 ,  G11B7/2533 ,  G11B7/2534 ,  G11B7/2585 ,  Y10S428/90 ,  Y10T428/24942 ,  Y10T428/2495 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optic memory medium including a first dielectric layer having a first main surface and a second main surface; a second dielectric layer for covering the first main surface of the first dielectric layer; and a magneto-optic memory layer for covering the second dielectric layer. The first dielectric layer is formed of an oxide having a refractive index in the range of 2.4 or more and 3.5 or less, and the second dielectric layer is formed of a material containing no oxygen. The magneto-optic memory medium is produced by the steps of forming a first layer by performing reactive sputtering in an atmosphere of a first sputter gas using a material containing a first element as a target; switching the first sputter gas to a second sputter gas; forming a second layer on the first layer by performing reactive sputtering in an atmosphere of the second sputter gas using a material containing the first element as a target; and forming a magneto-optic memory layer on the second dielectric layer.

    摘要翻译： 一种磁光存储介质，包括具有第一主表面和第二主表面的第一介电层; 第二电介质层，用于覆盖第一介电层的第一主表面; 以及用于覆盖第二介电层的磁光存储层。 第一电介质层由折射率在2.4以上且3.5以下的氧化物形成，第二电介质层由不含氧的材料形成。 磁光存储介质通过以下步骤制造：通过使用包含第一元素作为靶的材料在第一溅射气体的气氛中进行反应溅射来形成第一层; 将第一溅射气体切换到第二溅射气体; 通过使用包含第一元素作为目标的材料在第二溅射气体的气氛中进行反应溅射，在第一层上形成第二层; 以及在所述第二电介质层上形成磁光存储层。

    Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens
    4.
    发明授权
    Magneto-optical recording method using the relation of beam diameter and an aperture of converging lens 失效
    使用光束直径与会聚透镜孔径的磁光记录方法

    公开(公告)号：US06483785B1

    公开(公告)日：2002-11-19

    申请号：US09685829

    申请日：2000-10-10

    申请人： Yoshiteru Murakami ,  Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta ,  Naoyasu Iketani

    发明人： Yoshiteru Murakami ,  Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta ,  Naoyasu Iketani

    IPC分类号： G11B1100

    CPC分类号： G11B7/126 ,  G11B7/00718 ,  G11B11/10506 ,  G11B11/10515 ,  G11B11/10517 ,  G11B11/10543 ,  G11B11/10584 ,  G11B11/10586 ,  G11B11/10595 ,  Y10S428/90

    摘要： Featured is a recording and reproducing method for recording and reproducing information on and from a recording medium. The medium includes a base having a property that a light can be transmitted therethrough, a readout layer formed on the base, which has an in-plane magnetization at room temperature, whereas, a transition occurs from in-plane magnetization to perpendicular magnetization as temperature rises and a recording layer formed on said readout layer for recording thereon information magneto-optically. A groove for guiding a light beam is formed on a readout layer side of the base and a groove width is set substantially equal to a land width formed between grooves. The recording layer on the grooves and the recording layer on lands are used in recording and reproducing information. Further a light beam is incident on a converging lens of an optical head, the light beam having a larger diameter &ohgr; than an aperture &agr; of the converging lens for converging the light beam on a predetermined position of the magneto-optical recording medium.

    摘要翻译： 特色是用于在记录介质上记录和再现信息的记录和再现方法。 该介质包括具有光可以透射的性质的基底，形成在基底上的读出层，其在室温下具有面内磁化强度，而从平面内磁化转变为垂直磁化转变为温度 并且在所述读出层上形成用于在其上记录光学信息的记录层。 在基板的读出层侧形成用于引导光束的槽，并且将槽宽度设定为与槽之间形成的焊盘宽度大致相等。 凹槽上的记录层和焊盘上的记录层用于记录和再现信息。 此外，光束入射到光学头的会聚透镜上，所述光束具有比会聚透镜的孔径α更大的直径Ω，用于将光束会聚在磁光记录介质的预定位置。

    Magneto-optical recording medium and method of reproducing magneto-optical information using thereof
    6.
    发明授权
    Magneto-optical recording medium and method of reproducing magneto-optical information using thereof 失效
    磁光记录介质及其再现磁光信息的方法

    公开(公告)号：US5637394A

    公开(公告)日：1997-06-10

    申请号：US356857

    申请日：1994-12-15

    申请人： Junsaku Nakajima ,  Naoyasu Iketani ,  Yoshiteru Murakami ,  Akira Takahashi ,  Hiroyuki Katayama ,  Kenji Ohta

    发明人： Junsaku Nakajima ,  Naoyasu Iketani ,  Yoshiteru Murakami ,  Akira Takahashi ,  Hiroyuki Katayama ,  Kenji Ohta

    IPC分类号： G11B11/105 ,  G11B5/66

    CPC分类号： G11B11/10586 ,  G11B11/10515 ,  G11B11/10584 ,  Y10S428/90 ,  Y10T428/26 ,  Y10T428/265

    摘要： A magneto-optical recording medium comprising a readout layer and a recording layer has a relationship that an external magnetic field H1 is smaller than an external magnetic field H4, where the H1 is a minimum external magnetic field necessary to make a magnetization direction of the readout layer direct to the direction reverse to a magnetization direction of the recording layer substantially at the room temperature, and the H4 is a maximum external magnetic field necessary to make the magnetization direction of the readout layer direct to the direction same as the magnetization direction of the recording layer at an high temperature not lower than a predetermined temperature. Moreover, the magneto-optical disk is provided, between the readout layer and the recording layer, with an intermediate layer which inhibits an effective bias magnetic field from the recording layer to the readout layer at the room temperature. Since it is possible to reproduce only the information in the high-temperature area close to the center of the laser beam irradiated during reproducing, recording density is improved. Furthermore, since an initializing magnetic field at reproducing is not necessary and the reproducing magnetic field can be made smaller, the apparatus can be made smaller and the electric power consumption can be decreased.

    摘要翻译： 包括读出层和记录层的磁光记录介质具有外部磁场H1小于外部磁场H4的关系，其中H1是使读出磁化方向发生所需的最小外部磁场 层直接与基本上在室温下的记录层的磁化方向相反的方向，并且H4是使读出层的磁化方向直到与磁化方向相同的方向所需的最大外部磁场 记录层在不低于预定温度的高温下进行。 此外，在读出层和记录层之间设置磁光盘，其中间层在室温下抑制从记录层到读出层的有效偏置磁场。 由于只能再现靠近在再现期间照射的激光束的中心的高温区域的信息，所以记录密度提高。 此外，由于不需要再现时的初始化磁场并且可以使再现磁场更小，所以可以使装置更小，并且可以降低电力消耗。

    Magneto-optical memory element
    8.
    再颁专利
    Magneto-optical memory element 失效
    磁光存储元件

    公开(公告)号：USRE35629E

    公开(公告)日：1997-10-14

    申请号：US136019

    申请日：1993-10-14

    申请人： Yoshiteru Murakami ,  Akira Takahashi ,  Kazuo Van ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

    发明人： Yoshiteru Murakami ,  Akira Takahashi ,  Kazuo Van ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B11/10584 ,  G11B11/10586

    摘要： A magneto-optical memory element has a multi-layer construction in the order from a side first receiving light from a light-source which includes a first transparent dielectric film, a rare earth transition metal alloy film, a second transparent dielectric film and a reflective film. The magneto-optical device uses circular dichroism effect of a magnetic mater for reading information. The rare earth transition metal alloy film has a refractive index represented by n.+-..DELTA.n wherein n=3.2-3.55i and .DELTA.n=0.05-0.03i. The thickness of film is about 18 to 46 nm. The second transparent dielectric film has a refractive index of 2.0.+-.0.2 and a film thickness of 80 to 108 nm.

    摘要翻译： 磁光存储元件具有从第一次接收来自光源的一侧的顺序的多层结构，该光源包括第一透明电介质膜，稀土过渡金属合金膜，第二透明电介质膜和反射 电影。 磁光装置使用磁性体的圆二色性来读取信息。 稀土过渡金属合金膜的折射率为n +/- DELTA n，n = 3.2-3.55i，DELTA n = 0.05-0.03i。 膜的厚度为约18至46nm。 第二透明电介质膜的折射率为2.0 +/- 0.2，膜厚为80〜108nm。

    Magneto-optical recording medium
    9.
    发明授权
    Magneto-optical recording medium 失效
    磁光记录介质

    公开(公告)号：US5665467A

    公开(公告)日：1997-09-09

    申请号：US196978

    申请日：1994-02-15

    申请人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

    发明人： Junichiro Nakayama ,  Michinobu Mieda ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

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

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

    摘要： A magneto-optical recording medium includes a first magnetic layer, a second magnetic layer and a third magnetic layer respectively made of rare-earth-transition metal alloys which are laminated in this order. The first magnetic layer has a perpendicular magnetization in a temperature range between room temperature and its Curie temperature. The second magnetic layer made of GdFeCo is set such that its Curie temperature is higher than the Curie temperature of the first magnetic layer, coercive force thereof at room temperature is nearly zero, and that it has an in-plane magnetization at room temperature and a transition occurs therein from the in-plane magnetization to the perpendicular magnetization at above a predetermined temperature. The third magnetic layer is set such that it has a perpendicular magnetization in a temperature range of room temperature and its Curie temperature, its Curie temperature is higher than the Curie temperature of the first magnetic layer, and coercive force thereof at room temperature is smaller than the coercive force of the first magnetic layer.

    摘要翻译： 磁光记录介质包括依次层叠的分别由稀土 - 过渡金属合金制成的第一磁性层，第二磁性层和第三磁性层。 第一磁性层在室温和居里温度之间的温度范围内具有垂直磁化强度。 由GdFeCo制成的第二磁性层的居里温度设定为高于第一磁性层的居里温度，室温下的矫顽力接近零，在室温下具有面内磁化强度， 在从预定温度以上的面内磁化强度向垂直磁化发生。 第三磁性层被设定为使其在室温的温度范围内具有垂直磁化强度和居里温度，居里温度高于第一磁性层的居里温度，室温下的矫顽力小于 第一磁性层的矫顽力。

    Magneto-optical recording medium and magneto-optical recording apparatus capable of performing a light-modulation overwriting operation
    10.
    发明授权
    Magneto-optical recording medium and magneto-optical recording apparatus capable of performing a light-modulation overwriting operation 失效
    能够执行光调制重写操作的磁光记录介质和磁光记录装置

    公开(公告)号：US5615180A

    公开(公告)日：1997-03-25

    申请号：US198620

    申请日：1994-02-18

    申请人： Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

    发明人： Michinobu Mieda ,  Junichiro Nakayama ,  Hiroyuki Katayama ,  Akira Takahashi ,  Kenji Ohta

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

    CPC分类号： G11B11/10586 ,  G11B11/10534 ,  G11B11/10506 ,  G11B11/10519 ,  G11B11/10523

    摘要： A magneto-optical disk is provided with a recording layer that exhibits perpendicular magnetization, an intermediate layer wherein in-plane magnetization occurs at room temperature and a transition from the in-plane magnetization to perpendicular magnetization occurs as the temperature thereof rises, and an auxiliary layer that is made of a rare-earth-transition-metal alloy and that exhibits perpendicular magnetization, and these layers are laminated in this order. The composition of the rare-earth-transition-metal alloy is set so that the magnetic moment of the rare-earth metal is relatively greater than that of the transition metal at room temperature and the compensation temperature is located between room temperature and the Curie temperature T.sub.c3. A magneto-optical recording apparatus for rewriting information on the magneto-optical disk is provided with a single magnet for applying H.sub.w onto a portion on the magneto-optical disk irradiated by a light beam, as well as for applying H.sub.init having a greater intensity than H.sub.w onto a portion that is apart from the portion irradiated by the light beam. This arrangement makes it possible to achieve a more compact, thinner magneto-optical recording apparatus which allows light-modulation overwriting.

    摘要翻译： 磁光盘设置有表现出垂直磁化的记录层，其中在室温下发生面内磁化的中间层，并且随着其温度升高而发生从平面内磁化到垂直磁化的转变，辅助 层，其由稀土 - 过渡金属合金制成并且呈现垂直磁化，并且这些层依次层压。 设定稀土 - 过渡金属合金的组成使得稀土金属的磁矩在室温下比过渡金属的磁矩更大，并且补偿温度位于室温和居里温度之间 Tc3。 用于在磁光盘上重写信息的磁光记录装置设置有用于将Hw施加到由光束照射的磁光盘上的部分上的单个磁体，以及用于施加具有比光束更大的强度的Hinit Hw到与光束照射的部分分开的部分。 这种布置使得可以实现允许光调制重写的更紧凑，更薄的磁光记录装置。