| 摘要 |
<p>[Problem] To provide a rolled copper foil which has a moderately roughened surface whereby the foil has improved handleability, and which has excellent flexibility, is less apt to suffer surface scratches when being handled, and has satisfactory surface etchability. [Solution] A rolled copper foil which has a ratio of the surface roughness (Ra) to the foil thickness (t), Ra/t, of 0.004-0.007. When a 25-µm-long cross-section of the copper foil which extends along a direction parallel to the rolling direction of the copper foil is produced using a focused ion beam and a scanning ion microscope image of the cross-section is examined, then the average value (Lsa) of the depths (Ls) to which shear zones extend in the foil-thickness direction satisfies the following relationship with the thickness (t) of the copper foil: 0.01=Lsa/t=0.4.</p> |
