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

Claim 3:
4. A method for manufacturing a surface-treated copper foil, comprising:
a roughening treatment step of forming a roughened layer on at least one surface of an electrolytic copper foil wherein a noncontact roughness Spd of the roughened layer is made to be more than 2.6 peaks/μm2 and a surface roughness RzJIS of the rust preventive layer is made to be greater than 2.5 μm; and
a rust preventive treatment step of forming at least a nickel layer as a rust preventive layer on the roughened layer wherein a thickness of the nickel layer is made to be 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 made to be 1.4 to 2.6 peaks/μm2 and a surface roughness RzJIS of the rust preventive layer is made to be 1.0 to 2.5 μm.