STUDY ON THE OPTICAL PROPERTIES AND HYDROGEN CONTENT OF THE SILICON NITRIDE THIN FILM

The Si₃N₄ thin films have been manufactured by electron cyclotron resonance plasma enhanced chemical vapour deposition technology on the KBr and (111) monocrystal Si sub-strates, The infrared optical properties of the Si₃N₄ film have been studied by analysing its IR spectrum. The results show that the Si₃N₄ film can be used as an antireflexion and an-tireflectiug film of Si surface, The H content of Si₃N₄ thin film has been estimated from the infrared absorption area. It is obtained that the H content of the Si₃N₄ film deposited on the KBr substrate is lower than that deposited on Si substrate, and it derceases with increasing deposition temperature. The Raman spectra of the Si₃N₄ film deposited at 360℃ has also been measured.