Method for producing printed wiring board

    公开(公告)号:US11197379B2

    公开(公告)日:2021-12-07

    申请号:US16495259

    申请日:2018-03-29

    IPC分类号: H05K3/42 H05K3/00 H05K3/46

    摘要: The method for producing a printed wiring board according to the present invention with use of a metal-clad laminated sheet including a metal foil laminated on each of both surfaces of an insulating resin base material, the method at least including: a step (1) of irradiating a predetermined position in a surface (A) of the metal-clad laminated sheet with a laser to provide a via hole leading to the metal foil in a surface opposite to the surface (A); and a step (2) of irradiating a predetermined position in a surface (B), located in the opposite side to the surface (A), of the metal-clad laminated sheet with a laser to provide a via hole leading to the metal foil in a surface opposite to the surface (B).