ELECTROLYTIC COPPER FOIL

摘要

PROBLEM TO BE SOLVED: To provide copper foil highly adhesive to an etching resist layer by the surface finishing in the etching process of a copper-foil circuit without applying physical polishing such as buffing. SOLUTION: A titanium material of >=6.0 crystal grain size number is used in a rotary cathode drum in the electrolysis for manufacturing electrolytic copper foil. The electrolytic copper foil uses deposited torn-off and wound foil obtained by adding 0.2-20 mg/L glue and/or gelatin to a copper sulfate solution to be used as an electrolyte and with the crystal on the glossy-surface side of the foil having >=20% twin crystal structure.