Patent ID: 7771835

Claim:
An electrolytic copper foil which is manufactured using a copper electrolytic solution, the copper electrolytic solution containing, as additives, an organo-sulfur compound and at least one quaternary amine compound with a specific skeleton expressed by at least one of the following general formulae (2)-(4), (6), (7) and (9), which is obtained by an addition reaction between a compound which has one or more epoxy groups per molecule and an amine compound, followed by a quaternization of the nitrogen, wherein n 1 is an integer of 1 to 5, wherein n 3 is an integer of 1 to 3 and wherein R 1 and R 2 in the general formulae (2)-(4), (6), (7) and (9) each separately is a group selected from the group consisting of a hydroxyalkyl group, an ether group, an aromatic group, an aromatic-substituted alkyl group, an unsaturated hydrocarbon group and an alkyl group, R 3 is a benzyl group, an allyl group or an alkyl group with 1 to 5 carbon atoms, and X 1 − is Cl − , Br − or CH 3 SO 4 − .