Flexible Metal-Clad Laminate Plate

Abstract

Disclosed is a flexible metal clad laminate plate with good appearance which can be manufactured by a metalizing method such as evaporation coating, sputtering or plating. The flexible metal clad laminate plate has a polyimide film. The polyamide film is produced by reacting an aromatic diamine with an aromatic acid dianhydride to produce a polyamide acid and then imidizing the polyamide. The polyamide film has (A) an inflexion point of the storage modulus falling within the range from 270 to 340° C., (B) the peak top of tan δ; (which is a value given by dividing the loss modulus by the storage modulus) falling within the range from 320 to 410° C., (C) the storage modulus at 400° C. falling within the range from 0.5 to 1.5 GPa, and (D) the storage modulus α1 (GPa) at the inflexion point and the storage modulus α2 (GPa) at 400° C. both falling within the range satisfying Formula (1) below 85≧{(α1−α2)/α1}×100≧70.  (Formula 1)

Dependencies are inferred from the claim text.