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    • 6. 发明申请
    • PRINTED WIRING BOARD
    • 印刷线路板
    • US20130048355A1
    • 2013-02-28
    • US13537885
    • 2012-06-29
    • Toru FURUTAHirofumi FUTAMURAHisashi MINOURA
    • Toru FURUTAHirofumi FUTAMURAHisashi MINOURA
    • H05K1/11H05K1/09H05K1/00
    • H05K3/4602H05K1/0373H05K3/4644H05K2201/0209H05K2201/068H05K2201/09563H05K2201/09854
    • A printed wiring board has a core substrate including an insulative base material and having a penetrating hole, a first conductive circuit formed on a first surface of the substrate, a second conductive circuit formed on a second surface of the substrate, and a through-hole conductor including a copper-plated film and formed in the penetrating hole such that the through-hole conductor is connecting the first and second conductive circuits. The insulative base material of the substrate includes reinforcing material and resin and has a thermal expansion coefficient in a Z direction which is set at or above a thermal expansion coefficient of the copper-plated film of the through-hole conductor and set at or below 23 ppm, and the insulative base material of the substrate has a thermal expansion coefficient in an XY direction which is set lower than the thermal expansion coefficient of the copper-plated film of the through-hole conductor.
    • 印刷电路板具有包括绝缘基材并具有贯通孔的芯基板,形成在基板的第一表面上的第一导电电路,形成在基板的第二表面上的第二导电电路和通孔 导体,其包括镀铜膜,并形成在贯通孔中,使得通孔导体连接第一和第二导电电路。 基板的绝缘基材包括增强材料和树脂,并且在Z方向上的热膨胀系数设定在通孔导体的镀铜膜的热膨胀系数以上且设定在23以下 ppm,并且基板的绝缘基材的XY方向的热膨胀系数设定为低于通孔导体的镀铜膜的热膨胀系数。