| 摘要 |
Provided is an electrolytic copper foil having a surface roughness Rz of 2.0 µm or less, wherein a foil thickness difference in the width direction is 1.5% or less. Also provided is the electrolytic copper foil, wherein the foil thickness difference in the width direction is 1.3% or less. Further provided is the electrolytic copper foil, wherein a variation in the roughness in the width direction (Rzmax-Rzmin)/Rzavg is 15% or less. An object of the present invention is to provide an electrolytic copper foil having low surface roughness, wherein the formation of an "elongation wrinkle" and a discolored streak along the length direction is suppressed by allowing the thickness to be uniform in the width and length directions.
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