| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a porous metal foil sheet easy to work, capable of reducing working cost and preventing production of burrs and breakage when worked, and having strength. SOLUTION: This forming method is to laminate an ultraviolet ray hardening type, heat peeling type or water soluble adhesive tape 2 on a metal foil sheet 1 of less than 50μm thick, to uniformly drill a large number of holes 5 numerical aperture of which is to be more than 25% by punching work on the ultraviolet ray hardening type adhesive tape 2 and the metal foil sheet 1, to lose adhesive force from the adhesive tape 2 and to peel the adhesive tape 2 from the metal foil sheet 1.
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