| 摘要 |
PROBLEM TO BE SOLVED: To provide an FPC which maintains excellent bondability between a resin film and copper foil and has a high degree of freedom in arrangement relation between the resin film and a positioning marker with excellent transmissive visibility at a resin film portion remaining after removal of the copper foil by chemical etching, and a copper-clad laminate for obtaining the FPC.SOLUTION: The copper-clad laminate includes a resin film and copper foil which are directly laminated. The peel strength between the resin film and the copper foil is 0.5 N/mm or more. The resin film remaining after removal of a part of the copper foil by chemical etching has a transmissive visibility Vdefined by a formula: V=(T-T)×C/100 (T: total light transmittance (unit: %), T: diffuse transmittance (unit: %), and C: transparency (unit: %)) satisfying: V≥10%. |
