ELEKTROLYTKUPFERFOLIE MIT HOHER ZUGSPANNUNG UND VERFAHREN ZU DEREN HERSTELLUNG

摘要

There is provided an electrodeposited copper foil, in which the surface roughness of a matte surface side of the copper foil is smoothed and the tensile strength thereof, particularly after heating is enhanced, and having not more than 2.5 mu m in the surface roughness Rz of a matte surface of a copper foil and not less than 40 kgf in the tensile strength of a copper foil after heating. There is also provided a process for producing a high tensile strength electrodeposited copper foil comprising a step of electrolyzing with an electrolyte containing a copper sulfate and sulfuric acid as main components, and containing 0.01 to 0.10 g/l of a polyether reperesented by the structural formula of -CH2CH2O-, 0.5 to 1.0 g/l of tin ions, 0.5 to 5.0 g/l of iron ions and less than 0.1 mg/l of chlorine ions.