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    Optical recording medium having pit rows on every other boundary and reproducing method thereof
    41.
    发明授权
    Optical recording medium having pit rows on every other boundary and reproducing method thereof 失效
    在每隔一个边界具有凹坑排的光记录介质及其再现方法

    公开(公告)号：US5673250A

    公开(公告)日：1997-09-30

    申请号：US468776

    申请日：1995-06-06

    申请人： Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta ,  Shigeo Terashima

    发明人： Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta ,  Shigeo Terashima

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/26 ,  G11B11/10 ,  G11B11/105 ,  G11B27/10

    CPC分类号： G11B7/24085 ,  G11B11/10565 ,  G11B7/00718 ,  G11B7/0938 ,  G11B7/261

    摘要： Grooves and lands are provided to a magneto-optical disk so as to be alternately arranged, and recording bit strings are formed on the grooves and lands respectively so that information is recorded. Moreover, pit rows are formed on boundary sections between the adjoining grooves and lands so that address information of a recording/reproducing track is recorded, and the pit rows are formed every other boundary section. When the grooves and the lands are scanned as the recording/reproducing track by a light, an address of the recording/reproducing track is read out from the pit rows, and successively, discrimination is made whether the recording/reproducing track which is scanned by an optical spot is the groove or the land. This prevents crosstalk which causes inclusion of address information in the next pit rows, thereby, making it possible to obtain accurate address information. Moreover, since a total number of formed pit rows can be decreased and accuracy in a shape of pits is relieved, an optical recording medium can be easily produced.

    摘要翻译： 将槽和焊盘提供给磁光盘以交替布置，并且分别在沟槽和焊盘上形成记录位串，以便记录信息。 此外，凹坑行形成在相邻的凹槽和平台之间的边界部分上，从而记录记录/再现轨迹的地址信息，并且每隔一个边界部分形成凹坑行。 当通过光将凹槽和平台作为记录/再现轨道进行扫描时，从凹坑行读出记录/再现轨道的地址，并且依次区分是否由 一个光点是凹槽或土地。 这防止了在下一个凹坑行中包含地址信息的串扰，从而可以获得准确的地址信息。 此外，由于可以减少形成的凹坑排的总数，并且可以减轻凹坑形状的精度，因此可以容易地制造光学记录介质。

    Magnetic recording medium and information recording-reproduction method using the same
    42.
    发明授权
    Magnetic recording medium and information recording-reproduction method using the same 失效
    磁记录介质和使用该磁记录介质的信息记录再现方法

    公开(公告)号：US5656385A

    公开(公告)日：1997-08-12

    申请号：US88608

    申请日：1993-07-07

    申请人： Junsaku Nakajima ,  Akira Takahashi ,  Junji Hirokane ,  Yoshiteru Murakami ,  Kenji Ohta

    发明人： Junsaku Nakajima ,  Akira Takahashi ,  Junji Hirokane ,  Yoshiteru Murakami ,  Kenji Ohta

    IPC分类号： G11B11/10 ,  G03G5/16 ,  G11B5/00 ,  G11B5/02 ,  G11B5/64 ,  G11B5/65 ,  G11B5/66 ,  G11B5/74 ,  G11B11/105 ,  G11B13/04 ,  G11B19/02

    CPC分类号： G03G5/16 ,  G11B11/10589 ,  G11B13/045 ,  G11B5/00 ,  G11B5/656 ,  G11B11/10504 ,  G11B11/10515 ,  G11B11/10532 ,  G11B19/02 ,  G11B2005/0002 ,  G11B2005/0021 ,  G11B5/74 ,  Y10S428/90

    摘要： A magnetic recording medium having a recording layer made up of a ferrimagnetic material whose compensation temperature is included within room temperatures and an information recording-reproduction method using the magnetic recording medium. During recording, while a light beam is projected on the recording layer so as to raise the temperature of a recording portion, information is recorded by applying a signal magnetic field from a magnetic head. During reproduction, while a light beam is projected on a reproducing portion of the recording layer so as to raise the temperature thereof, information is reproduced by detecting leakage flux from the reproducing portion by the magnetic head. Thus, during reproduction, no magnetic flux is generated from other portions of the recording layer not irradiated by the light beam. With the arrangement, crosstalk due to leakage flux from adjoining tracks not irradiated by the optical beam can be eliminated. Therefore, track pitches can be made narrower so as to increase recording density of the magnetic recording medium. Further, since crosstalk from adjoining tracks is eliminated, a high S/N can be achieved.

    摘要翻译： 一种磁记录介质，其具有由补偿温度包括在室温内的铁氧体材料制成的记录层和使用该磁记录介质的信息记录再现方法。 在记录期间，当光束投射在记录层上以提高记录部分的温度时，通过施加来自磁头的信号磁场来记录信息。 在再现期间，当光束投射在记录层的再现部分上以升高其温度时，通过由磁头检测来自再现部分的漏磁通来再现信息。 因此，在再现期间，不会由不被光束照射的记录层的其它部分产生磁通量。 利用该布置，可以消除由于未被光束照射的相邻轨道的漏磁通引起的串扰。 因此，可以使轨道间距更窄，以提高磁记录介质的记录密度。 此外，由于消除了来自相邻轨道的串扰，可以实现高S / N。

    Optical recording medium having pit rows
    46.
    发明授权
    Optical recording medium having pit rows 失效
    具有凹坑行的光记录介质

    公开(公告)号：US06058100A

    公开(公告)日：2000-05-02

    申请号：US928042

    申请日：1997-09-11

    申请人： Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta ,  Shigeo Terashima

    发明人： Michinobu Mieda ,  Junji Hirokane ,  Akira Takahashi ,  Kenji Ohta ,  Shigeo Terashima

    IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/005 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/26 ,  G11B11/10 ,  G11B11/105 ,  G11B27/10

    CPC分类号： G11B7/24085 ,  G11B11/10565 ,  G11B7/00718 ,  G11B7/0938 ,  G11B7/261

    摘要： Grooves and lands are provided to a magneto-optical disk so as to be alternately arranged, and recording bit strings are formed on the grooves and lands respectively so that information is recorded. Moreover, pit rows are formed on boundary sections between the adjoining grooves and lands so that address information of a recording/reproducing track is recorded, and the pit rows are formed every other boundary section. When the grooves and the lands are scanned as the recording/reproducing track by a light, an address of the recording/reproducing track is read out from the pit rows, and successively, discrimination is made whether the recording/reproducing track which is scanned by an optical spot is the groove or the land. This prevents crosstalk which causes inclusion of address information in the next pit rows, thereby, making it possible to obtain accurate address information. Moreover, since a total number of formed pit rows can be decreased and accuracy in a shape of pits is relieved, an optical recording medium can be easily produced.

    摘要翻译： 将槽和焊盘提供给磁光盘以交替布置，并且分别在沟槽和焊盘上形成记录位串，以便记录信息。 此外，凹坑行形成在相邻的凹槽和平台之间的边界部分上，从而记录记录/再现轨迹的地址信息，并且每隔一个边界部分形成凹坑行。 当通过光将凹槽和平台作为记录/再现轨迹进行扫描时，从凹坑行读出记录/再现轨道的地址，并且依次区分是否由 一个光点是凹槽或土地。 这防止了在下一个凹坑行中包含地址信息的串扰，从而可以获得准确的地址信息。 此外，由于可以减少形成的凹坑排的总数，并且可以减轻凹坑形状的精度，因此可以容易地制造光学记录介质。

    Arrangement of magneto-optical recording medium which capable of reproducing an individual bit
    47.
    发明授权
    Arrangement of magneto-optical recording medium which capable of reproducing an individual bit 失效
    能够再现单个位的磁光记录介质的布置

    公开(公告)号：US5777953A

    公开(公告)日：1998-07-07

    申请号：US769254

    申请日：1996-12-18

    申请人： Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

    发明人： Junji Hirokane ,  Junichiro Nakayama ,  Junsaku Nakajima ,  Akira Takahashi ,  Kenji Ohta

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

    CPC分类号： G11B11/10515 ,  G11B11/10584 ,  G11B11/10589 ,  G11B11/10593

    摘要： A magneto-optical recording medium is arranged so that (1) a first transparent dielectric layer, (2) a reproduction layer showing in-plane magnetization at room temperature while showing perpendicular magnetization in response to temperature rise, (3) a second transparent dielectric layer, (4) a recording layer made of perpendicular magnetization film; and (5) a protective layer are laminated on a substrate in this order. The reproduction layer has a thickness of 5 nm to 30 nm, the second transparent dielectric layer has a thickness of 6 nm to 40 nm, and the recording layer has a thickness of 20 nm to 80 nm. It is possible to separately reproduce individual recording bit even when one or more adjacent recording bits exist within the diameter of the light beam converged onto a target recording bit. This is because the information of a recording magnetic domain of a portion showing in-plane magnetization is masked.

    摘要翻译： 磁光记录介质被布置成使得（1）第一透明介电层，（2）再现层，其在室温下显示面内磁化同时响应于温度升高而显示垂直磁化强度，（3）第二透明电介质 层，（4）由垂直磁化膜制成的记录层; 和（5）保护层依次层压在基板上。 再生层的厚度为5nm〜30nm，第二透明电介质层的厚度为6nm〜40nm，记录层的厚度为20nm〜80nm。 即使在收敛到目标记录位上的光束的直径内存在一个或多个相邻记录位，也可以分别再现单个记录位。 这是因为屏蔽显示面内磁化的部分的记录磁畴的信息。

    Optical memory element and manufacturing method thereof
    48.
    发明授权
    Optical memory element and manufacturing method thereof 失效
    光存储元件及其制造方法

    公开(公告)号：US5470694A

    公开(公告)日：1995-11-28

    申请号：US74272

    申请日：1993-06-10

    申请人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

    发明人： Kenji Ohta ,  Junji Hirokane ,  Akira Takahashi ,  Tetsuya Inui ,  Shohichi Katoh ,  Toshihisa Deguchi

    IPC分类号： G11B7/26 ,  G03C5/16

    CPC分类号： G11B7/261 ,  Y10S430/136 ,  Y10S430/146

    摘要： A method for manufacturing an optical memory element including the steps of disposing a resist film on a substrate, placing a photo-mask carrying a guide groove pattern on the resist film so as to position the photo-mask over a predetermined position of the substrate, forming a guide groove pattern latent image on the resist film, developing the guide groove pattern latent image formed on the resist film, conducting an etching operation through the developed guide groove pattern as to form guide grooves in the substrate, removing the resist film from the substrate, and disposing a recording medium layer on the substrate having the guide grooves formed therein.

    摘要翻译： 一种用于制造光学存储元件的方法，包括以下步骤：在衬底上设置抗蚀剂膜，将在所述抗蚀剂膜上携带引导槽图案的光掩模放置在所述衬底的预定位置上， 在抗蚀剂膜上形成引导槽图案潜像，使形成在抗蚀剂膜上的引导槽图案潜像显影，通过显影导槽图案进行蚀刻操作，以在基板上形成引导槽， 并且在其上形成有引导槽的基板上设置记录介质层。

    Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer
    49.
    发明授权
    Method and apparatus for reproducing data from a magneto-optical recording medium having a readout layer, transfer layer and recording layer 失效
    用于从具有读出层，转印层和记录层的磁光记录介质再现数据的方法和装置

    公开(公告)号：US5962126A

    公开(公告)日：1999-10-05

    申请号：US975517

    申请日：1997-11-20

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

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

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

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

    摘要： The invention features an apparatus and method for reproducing recorded bits from a magneto-optical recording medium. The medium includes a base, a readout layer formed on the base, a transfer layer formed on the readout layer and a recording layer formed on the transfer layer. The readout and recording layers each exhibit perpendicular magnetization in a temperature range between room temperature and, respectively, the readout layer's Curie temperature and the recording layer's Curie temperature. The transfer layer is predominant in-plane magnetization at room temperature and an in-plane to perpendicular magnetization transition occurs at a temperature above room temperature. Also, the recording layer Curie temperature is lower than the Curie temperature of the transfer layer. The reproducing method includes the steps of projecting a light beam, applying a subsidiary magnetic field and reproducing information based on reflected light from the readout layer while applying the subsidiary magnetic field. The light beam is projected onto the readout layer from the side of the base so the in-plane to perpendicular magnetization transition occurs in a portion of the transfer layer, the portion corresponding to a central portion of the light beam spot. The intensity of the subsidiary magnetic field is higher than the coercive force of the readout layer and less than the exchange coupling force exerted from the recording-layer and the transfer layer to the readout layer.

    摘要翻译： 本发明的特征在于一种用于从磁光记录介质再现记录位的装置和方法。 介质包括基底，形成在基底上的读出层，形成在读出层上的转印层和形成在转印层上的记录层。 读出和记录层各自在室温和读出层的居里温度和记录层的居里温度之间的温度范围内呈现垂直磁化强度。 转移层在室温下是主要的面内磁化，并且在高于室温的温度下发生面内到垂直磁化转变。 此外，记录层居里温度低于转印层的居里温度。 再现方法包括以下步骤：投射光束，施加辅助磁场，并且在施加辅助磁场的同时基于来自读出层的反射光再现信息。 光束从基底侧投射到读出层上，因此在转移层的一部分中发生垂直磁化转变，该部分对应于光束点的中心部分。 辅助磁场的强度高于读出层的矫顽力，并且小于从记录层和转印层施加到读出层的交换耦合力。