| 摘要 |
PROBLEM TO BE SOLVED: To provide a production method which stably and efficiently (i.e., inexpensively) produces rolled copper foil having high bending properties suitable for a flexible wiring member such as a flexible printed wiring board. SOLUTION: In the method for producing rolled copper foil, the rolled copper foil after base material annealing and before a final cold rolling step has an intensity ratio of the X-ray diffraction peak of copper crystals satisfying I<SB>�200}Cu</SB>/I<SB>�220}Cu</SB>≥10 in a result obtained by X-ray diffraction 2θ/θmeasurement with respect to the rolled face of the rolled copper foil, and in the copper foil in all the steps of the rolled copper foil after the final cold rolling step and before recrystallization annealing, the intensity ratio of the X-ray diffraction peak of the copper crystals satisfies I<SB>�200}Cu</SB>/I<SB>�220}Cu</SB>≥1. COPYRIGHT: (C)2010,JPO&INPIT |
