| abstract |
An object of the present invention is to provide an electrolytic copper coating that exhibits a bendability and flexibility equal to or better than those of rolled copper foil after the heat history in a circuit board fabrication process, especially after a heat history equivalent to the heat history applied when bonding with a polyimide film. The present invention provides an electrolytic copper coating and a method of manufacturing the same wherein, when performing heat treatment so that the LMP value shown in Equation 1 becomes 9000 or more, the result becomes a crystal distribution of crystal grains, having a maximum length of crystal grains after heat treatment of 10 µm or more, of 70% or more: LMP = T + 273 * 20 + Logt nwhere, 20 is a material constant of copper, T is temperature (°C), and t is time (hr). |