利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.008 秒)

    Surface acoustic wave device
    2.
    发明公开
    Surface acoustic wave device 失效
    一种表面声波装置。

    公开(公告)号：EP0065389A2

    公开(公告)日：1982-11-24

    申请号：EP82302321.3

    申请日：1982-05-06

    申请人： Hitachi, Ltd.

    发明人： Yamada, Jun ,  Hazama, Katashi

    IPC分类号： H03H9/145

    CPC分类号： H03H9/14508

    摘要： A surface acoustic wave device comprises on a piezoelectric substrate an interdigital transducer having an interdigital sending electrode part (1') in the formed direction and an interdigital reflecting electrode part (2') in the reverse direction. An electrical phase difference of 0 (radian) is applied between the sending and reflecting electrode parts while a distance (6') between the sending and reflecting electrode parts providing a geometrical phase difference therebetween is established to be where n is a positive integer and λ 0 is the wavelength of surface acoustic wave.

    An optical information disc
    4.
    发明公开
    An optical information disc 失效
    光学信息媒介

    公开(公告)号：EP0280028A3

    公开(公告)日：1990-09-05

    申请号：EP88100697.7

    申请日：1988-01-19

    申请人： HITACHI, LTD.

    发明人： Tokushuku, Nobuhiro ,  Yanagihara, Hitoshi ,  Hazama, Katashi ,  Yoshii, Masaki ,  Ebinuma, Naotake

    IPC分类号： G11B7/24

    CPC分类号： G11B7/26 ,  G11B7/0938 ,  G11B7/24

    摘要： An optical disc consists of a base plate, a reflective thin layer, and a protective thin layer. The optical disc has sample mark area (32) having two sample marks (10, 11), one (10) of which is off-set one side of a track, another (11) of which is off-set another side of a track. These sample marks are produced by an injection molding with replica technique. At the time of the injection molding, additional pressure moves soft injected plastic resin, which causes double transcription (10a, 11a) of the sample marks (10, 11). For preventing the double transcription, groove areas (35, 36) are provided both sides of the sample mark area (32). The groove areas (35, 36) has an anchor effect at the time of injection molding.

    An optical information disc
    5.
    发明公开
    An optical information disc 失效
    Optische信息平台

    公开(公告)号：EP0280028A2

    公开(公告)日：1988-08-31

    申请号：EP88100697.7

    申请日：1988-01-19

    申请人： HITACHI, LTD.

    发明人： Tokushuku, Nobuhiro ,  Yanagihara, Hitoshi ,  Hazama, Katashi ,  Yoshii, Masaki ,  Ebinuma, Naotake

    IPC分类号： G11B7/24

    CPC分类号： G11B7/26 ,  G11B7/0938 ,  G11B7/24

    摘要： An optical disc consists of a base plate, a reflective thin layer, and a protective thin layer. The optical disc has sample mark area (32) having two sample marks (10, 11), one (10) of which is off-set one side of a track, another (11) of which is off-set another side of a track. These sample marks are produced by an injection molding with replica technique. At the time of the injection molding, additional pressure moves soft injected plastic resin, which causes double transcription (10a, 11a) of the sample marks (10, 11). For preventing the double transcription, groove areas (35, 36) are provided both sides of the sample mark area (32). The groove areas (35, 36) has an anchor effect at the time of injection molding.

    摘要翻译： 光盘由基板，反射薄层和保护薄层组成。 光盘具有样品标记区域（32），其具有两个采样标记（10,11），其中一个（10）偏离轨迹的一侧，另一个（11）偏离了一个轨迹的另一侧 跟踪。 这些样品标记通过具有复制技术的注射成型制备。 在注射成型时，另外的压力移动软注射的塑料树脂，这导致样品标记（10,11）的双重转录（10a，11a）。 为了防止双重转录，在样品标记区域（32）的两侧设置有凹槽区域（35,36）。 槽区域（35,36）在注射成型时具有锚固效果。