| 摘要 |
The invention provides a treatment copper foil, which is low in roughness and high in peeling strength with an insulating resin substrate. After an absorption treatment, an active processing liquid after being impregnated is low in deterioration rate of the peeling strength, less in penetration amount and excellent in etching property. The copper foil is characterized in that the surface of the copper foil is sequentially equipped with a roughening treatment layer, a chromate layer and a silane coupling agent layer. The ten-point average roughness Rz of the copper foil surface is 1.0 mu m to 2.7 mu m. When the surface of the copper coil with the area thereof 177 mu M2 is measured by purple laser of visible light with the wavelength thereof 408 nm, the average interval S of local peaks is below 0.0230 mm and S does not include 0. |
