| abstract |
The present invention provides a laminated film with a metal layer that can simplify the manufacturing process, has high productivity, and can improve reliability when used in a flexible printed wiring board. In a laminated film with a metal layer in which a metal layer is laminated on at least one surface of a heat resistant insulating film via a heat resistant resin layer containing an organic solvent-soluble thermoplastic polyimide as an essential component, the glass of the heat resistant resin layer Lamination with metal layer, characterized in that transition temperature is in the range of 200-320 ° C, adhesive strength of laminated film with metal layer is 8 N / cm or more, and solder heat resistance after moisture absorption is 260 ° C or more the film. [Selection figure] None |