Wiring substrate and method for manufacturing wiring substrate

    公开(公告)号:US11792929B2

    公开(公告)日:2023-10-17

    申请号:US17588457

    申请日:2022-01-31

    CPC classification number: H05K1/116 H05K3/26 H05K3/389 H05K3/422 H05K2201/0989

    Abstract: A wiring substrate includes a first insulating layer, a first conductor layer, a second insulating layer, a second conductor layer, a connection conductor penetrating through the second insulating layer and connecting the first and second conductor layers, and a coating film formed on a surface of the first conductor layer such that the coating film is adhering the first conductor layer and the second insulating layer. The first conductor layer includes a conductor pad and a wiring pattern such that the conductor pad is in contact with the connection conductor and the wiring pattern is covered by the coating film, the conductor pad of the first conductor layer has a surface facing the second insulating layer and having a first surface roughness higher than a surface roughness of a surface of the wiring pattern, and the coating film has opening such that the opening is exposing the conductor pad entirely.

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