Abstract: A polymeric film and process for making same, the film comprising residues of 5(6)-amino-2-(p-aminophenyl) benzimidazole, aromatic diamine, and aromatic diacid-chloride, in the form of polymer having a polymer chain including a salt of formula I, wherein C+ is a sodium, potassium, or calcium cation, the film having a thickness of about 1 to 50 micrometers, and a dielectric constant of 4.5 or greater at 2 GHz in the absence of any particulate additives that increase the dielectric constant of the film.