COPPER ELECTROLYTIC SOLUTION USED FOR PRODUCING ELECTROLYTIC COPPER FOIL, AND ELECTROLYTIC COPPER FOIL OBTAINED BY USING THE COPPER ELECTROLYTIC SOLUTION

摘要

PPROBLEM TO BE SOLVED: To provide a copper electrolytic solution which stably imparts an electrolytic copper foil a lower profile than that of a low profile electrolytic copper foil which has been conventionally supplied in a market. PSOLUTION: The adopted sulfuric acid-based copper electrolytic solution for achieving the purpose includes Janus green added to a copper electrolytic solution for producing the low profile electrolytic copper foil, which is an acidic copper sulfate electrolytic solution containing 3-mercapto-1-propane sulfonic acid, a polymer of a quaternary ammonium salt having a cyclic structure, and chlorine. A method for producing the electrolytic copper foil includes carrying out electrolysis in the sulfuric acid-based copper electrolytic solution at a predetermined temperature and with a predetermined current density. The electrolytic copper foil is obtained by the production method. A surface-treated copper foil is obtained by subjecting the deposition face of the electrolytic copper foil to one or more treatments selected from among roughening treatment, rust-preventing treatment, and silane coupling treatment. PCOPYRIGHT: (C)2007,JPO&INPIT