PRINTED WIRING BOARD
    182.
    发明公开

    公开(公告)号:US20230319987A1

    公开(公告)日:2023-10-05

    申请号:US18191062

    申请日:2023-03-28

    Abstract: A printed wiring board includes a first conductor layer, an insulating layer formed on the first conductor layer, a second conductor layer formed on a surface of the insulating layer and including a conductor circuit, and a via conductor formed in an opening formed in the insulating layer and connecting the first and second conductor layers. The second conductor layer and via conductor include a seed layer and an electrolytic plating layer formed on the seed layer such that the seed layer has a first layer and a second layer formed on the first layer, the first layer has a width greater than a width of the second layer in cross section of the conductor circuit in the second conductor layer and that the electrolytic plating layer has a width greater than the width of the first layer in cross section of the conductor circuit in the second conductor layer.

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