Patent ID: 7951251

Claim:
A method for producing a flexible metal-clad laminate, the method comprising laminating a metal foil to an adhesive film with a thermal roll laminator including at least one pair of metal rollers, the adhesive film including a polyimide film and an adhesive layer containing a thermoplastic polyimide, the adhesive layer being disposed on at least one surface of the polyimide film, the method comprising forming the polyimide film by a process comprising: step (A) of casting and applying a solution containing a polyamic acid onto a support to form a gel film; step (B) of stripping off the gel film and fixing both ends of the gel film; and step (C) of heating and transporting the film with both ends being fixed, wherein in at least a portion of step (C), the film is transported in a state loosened in the TD direction such that a distance between from one fixed end to a second fixed end of said both ends of gel film is smaller than a width of the film.