MANUFACTURE OF FILM CAPACITOR

PURPOSE:To make it possible to produce the metallized film having a margin part in a highly efficient manner by a method wherein, when the metallized film is manufactured, a corona discharge treatment is selectively conducted on the part where metal is vapordeposited on one or both sides of a resin film. CONSTITUTION:When a metallized film is manufactured, a corona discharge treatment is selectively conducted on the part where metal is vapor-deposited on one or both sides of a resin film 8. For example, the polyprophylene film 8 guided by a guide roll 7 reaches an earth role 9, and a corona discharge is conducted between the earth role 9 and an electrode role 10. As an electrode part 11 and a non-electrode part 12 are arranged on the electrode 10 and also as a discharge mask 14 is provided between the earth role 9 and the electrode role 10, the corona discharge is conducted only when the electrode 11 passes through the clearance 13 of the mask 14, and a corona discharge treatment part 15 and a nonpcorona treatment part 16 are formed. Then, the film 8 is guided to a cooling roller 17, the electrode material 19 sent from an evaporation source 18 is adhered to the corona discharge treatment part 15 only, and an electrode part 20 is formed.