| 摘要 |
PROBLEM TO BE SOLVED: To obtain the manufacturing method of a metal foil without the generation of wrinkles in the metal foil even in winding or unwinding, without the generation of blocking even in an annealing process and without the generation of troubles even in the usage by users. SOLUTION: In the rolling of the metal foil, when Li is defined as the circumferential length in the width direction of a winding coil at the time of rolling, L0 is defined as the average length of Li ,ΔLi (=Li -L0 ) is defined as the deviation of the circumferential length,ΔLi /L0×10<5> =I-unit is defined, IM means I-unit in the central part, IE means the average value of I-unit in both end parts, Imax means the maximum part and Imin means the minimum part when a local distortion exists in the intermediate part, the metal foil is winded while regulating so as to be 35>IE-IM>-30, moreover Imax -Imin <20.
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