Patent ID: 7381475

Claim:
A treated copper foil comprising a copper foil on at least one side of which roughening particles are deposited to make a roughening treated surface, said roughening treated surface having a surface roughness Rz of 1.5 to 4.0 μm and luminosity of not more than 30, wherein a height of projections formed of said roughening particles is 1 to 5 μm and 200 to 25000 of said projections are distributed in a 100 μm×100 μm area, and a surface formed with projections formed from said roughening particles is formed with a stainproof layer in the ranges of Ni: 0.01 to 0.5 mg/dm 2 , Zn: 0.01 to 0.5 mg/dm 2 , Cr: 0.01 to 0.3 mg/dm 2 .