PUNCHED THIN FILM AND POWER STORAGE DEVICE USING THE SAME

PROBLEM TO BE SOLVED: To provide a punched thin film capable of improving adhesion with a coating material and a power storage device using the same.SOLUTION: A punched thin film 1 includes: a first surface 1a; and a second surface 1b facing the first surface 1a. A through-hole 11 penetrating from the first surface 1a to the second surface 1b is provided. The through-hole 11 has a first region 11a, having an opening in the first surface 1a, expanding from the second surface 1b side toward the first surface 1a and a second region 11b, having an opening in the second surface 1b, expanding from the first surface 1a side toward the second surface 1b. 【課題】塗工物との接着性を向上することが可能な穿孔薄膜及び穿孔薄膜を用いた蓄電装置を提供する。【解決手段】穿孔薄膜１は、第一面１ａと、第一面１ａに対向する第二面１ｂとを備え、第一面１ａから第二面１ｂに貫通する貫通孔１１が設けられる。貫通孔１１は、第一面１ａに開口して第二面１ｂ側から第一面１ａに向かって広がる第一領域１１ａと、第二面１ｂに開口して第一面１ａ側から第二面１ｂに向かって広がる第二領域１１ｂとを有する。【選択図】図２