Patent ID: 11952675
Assignee: NIPPON DENKAI, LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H  Y | IPC C  H

Claim 0:
1. A surface-treated copper foil comprising:
an electrolytic copper foil;
a roughened layer covering at least one surface side of the electrolytic copper foil; and
a rust preventive layer further covering the roughened layer,
wherein the rust preventive layer is at least one surface of the surface-treated copper foil; the rust preventive layer comprises at least a nickel layer; and a thickness of the nickel layer is 0.8 to 4.4 g/m2 in terms of mass per unit area of nickel; and
a noncontact roughness Spd of the rust preventive layer is 1.4 to 2.6 peaks/μm2 and a surface roughness RzJIS of the rust preventive layer is 1.0 to 2.5 μm.