The possibility of forming carbon nitride CNx by high dose nitrogen implantation into carbon film has been investigated.The sample is evaluated by Fourier transformation infrared absorption spectroscopy(FTIR)
X-ray photoelectron spectroscopy(XPS)
X-ray diffraction analysis(XRD) and Vickers microhardness measurement.The results verify the formation of C-N covalent bond in the sample during the process of high dose nitrogen implantation into carbon film.