Printed wiring board and method for producing the same
    6.
    发明授权
    Printed wiring board and method for producing the same 有权
    印刷电路板及其制造方法

    公开(公告)号:US06715204B1

    公开(公告)日:2004-04-06

    申请号:US09720953

    申请日:2001-02-13

    IPC分类号: H05K302

    摘要: A printed circuit board and a method for manufacturing the same that facilitates the formation of an upper surface pattern and prevents a lower surface metal foil from being damaged when forming a blind via hole with a laser. A lower surface and an upper surface of an insulative substrate (5) are respectively coated with a lower surface metal foil (220) and an upper surface metal foil (210), the thickness of which is less than that of the lower surface metal foil (220). Next, an opening (213) is formed in the upper surface metal foil at a location corresponding to a blind via hole formation portion (35) of the insulative substrate. A blind via hole (3), the bottom of which is the lower surface metal foil, is formed by emitting a laser (8) against the blind via hole formation portion (35) through the opening (213). Then, a metal plating film (23) is applied to the wall of the blind via hole (3), and an upper surface pattern (21) and a lower surface pattern (22) are formed through etching.

    摘要翻译: 一种印刷电路板及其制造方法,其有助于形成上表面图案,并且在用激光形成盲孔时防止下表面金属箔被损坏。 绝缘基板(5)的下表面和上表面分别涂覆有下表面金属箔(220)和上表面金属箔(210),其厚度小于下表面金属箔的厚度 (220)。 接着,在与上述绝缘性基板的盲通孔形成部(35)对应的位置,在上表面金属箔上形成有开口部(213)。 通过开口(213)向盲通孔形成部分(35)发射激光器(8),形成底部金属薄片的盲孔(3)。 然后,将金属镀膜(23)施加到盲孔(3)的壁上,通过蚀刻形成上表面图案(21)和下表面图案(22)。