| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal foil sheet that has a continuous pattern configured seamlessly in a longitudinal direction thereof so as to be suitably usable for a collector for a secondary battery.SOLUTION: A roll-like metal foil sheet used as a collector for a secondary battery includes: a seamless, continuous etching pattern, in which through holes with a predetermined shape are arranged regularly at constant intervals; and an unprocessed part which is continued in a longitudinal direction in a belt-like manner, wherein the unprocessed part is provided with one of a positioning hole, a conveying hole and a detection mark. |
