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Polycrvstalline zinc nitride films are deposited on Coming 7059 ghss substrates by pulsed filtered cathodic vacum arc deposition(PFCVAD).The crystallographic structure is studied by means of x-ray diffraction.These measurements show that all the films are crystallized in the eubic structure.in a preferred orientation along the (332) and (631) directions.Weak XRD signal shows small crystallites distributed in an amorphous tissue.A small improvement of crystallinity is observed with annealing.Optical parameters such as absorption.energy band gap.Urbach teil,extinction coeffcients have been determined.The Urbach tail energy is decreased with anneeding at 500°C for one hour.Energy band gap values are found to be increased by annealing.