Nitrogen-rich carbon nitride films were prepared by three different deposit
ion methods on fused silica, stainless steel and silicon cantilever substra
tes. Their optical properties were studied by spectroscopic ellipsometry an
d UV spectrometry. Mechanical properties such as plastic and Vickers microh
ardness, Young's modulus, adhesion and film stress were also tested. The re
sults were compared with the properties of films with lower nitrogen concen
trations.