Stretched polycarbonate films filled with carbon black

A polycarbonate film having a surface resistivity of 1 to 10.sup.9 .OMEGA. and a thickness of 0.002 mm to 0.4 mm containing carbon black or graphite in an amount of 10 to 40% by weight, obtained by a process comprising dispersing the corresponding amount of carbon black or graphite in a solution of a thermoplastic aromatic polycarbonate with a Mw (weight average molecular weight) of 20,000 to 300,000, producing a cast film of 0.004 mm to 0.42 mm thickness and stretching the cast film monoaxially or biaxially by at least 5% to at most 250%, said polycarbonate film being characterized in that its elongation at break is greater than that of a corresponding unstretched similarly filled film having an identical thickness.