| 摘要 |
PROBLEM TO BE SOLVED: To efficiently manufacture perforated foil large in freedom of size, pitches, etc., of holes without causing cost increase. SOLUTION: Metallic foil 5 is arranged on a metallic mold 4 having a punching hole 4a, when an elastic body 3 arranged on the metallic foil 5 is pressurized from above, the elastic body 3 is pushed in the punching hole 4a with the metallic foil 5, the metallic foil 5 is punched out by shearing force between the elastic body 3 pushed in the punching hole 4a and an edge part of the punching hole 4a, and a hole 5a corresponding to the punching hole 4a is formed on the metallic foil 5.
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