| abstract |
【Task】 Providing a method for manufacturing a drilling entry sheet that provides excellent hole positioning accuracy in drilling of copper-clad laminates. [Solution] In the manufacturing method of the drill hole entry sheet in which the resin composition layer is attached to at least one surface of the metal foil, the resin composition layer is subjected to a surface smoothing treatment, and the surface roughness of the resin composition layer is determined from the center line. A method for producing an entry sheet for drilling, in which the average roughness (Ra) is 0.2 to 1.0 μm and the ten-point average roughness (Rz) is 2 to 10 μm. [Selection] None |