Patent ID: 7378160

Claim:
An electrolytic copper foil having a surface roughness Rz in a range of 0.90 to 1.20 μm, a normal-temperature tensile strength in a range of 30.5 to 37.9 kgf/mm 2 , a normal-temperature elongation in a range of 6.62 to 8.90%, a high-temperature tensile strength in a range of 20.1 to 22.3 kgf/mm 2 and a high-temperature elongation in a range of 12.1 to 18.2% and produced by using an electrolytic solution containing copper, an organosulfur compound and an amine compound having a specific skeleton represented by undermentioned general formula (1), which is synthesized by an addition reaction of an amine compound with a compound having one or more epoxy groups in a molecule thereof, wherein R 1 and R 2 are each selected from the group consisting of hydroxyalkyl groups, ether groups, aromatic groups, aromatic-substituted alkyl groups, unsaturated hydrocarbon groups, and alkyl groups, A represents an epoxy compound residue, and n represents an integer greater than or equal to 1.