Poly (tetrafluorethylene) and polyimide samples were irradiated by a p
ulsed laser source at 308 nm and the resulting surface morphology was
investigated. The photoablated surfaces show a strong dependence on th
e optical and structural parameters of the polymers. The roughness of
the fractal surfaces has been characterized by means of calculating th
eir fractal dimensions and the results are interpreted as a function o
f the polymer physical parameters.