SURFACE-TREATED COPPER FOIL
    9.
    发明公开

    公开(公告)号:US20240308183A1

    公开(公告)日:2024-09-19

    申请号:US18546748

    申请日:2022-02-04

    IPC分类号: B32B15/20 B32B15/04 B32B15/08

    摘要: A surface-treated copper foil which maintains peel strength against the resin substrate of the surface-treated copper foil and achieves desired low transmission loss even at high frequencies is provided. The surface-treated copper foil of the present invention includes an electrolytic copper foil, at least one roughened layer that covers one surface of the electrolytic copper foil, an anti-rust layer that covers the at least one roughened layer, and a silane coupling agent-treated layer that covers the anti-rust layer, in which a surface of the surface-treated copper foil on a side of the layers (the surface to be bonded to the resin substrate) has a developed interfacial area ratio Sdr of 40% or less, an arithmetic mean peak curvature Spc of 200 mm−1 or less and a root mean square gradient Sdq of 0.30 to 0.90, or particles on the surface to be bonded of the surface-treated copper foil have an average particle size of 0.50 μm or less and an average particle length of 0.40 to 0.70 μm.