[Ultraviolet transmission spectra of BC(x)N thin films].

BCN, BC2N and BC3N thin films with transmission increasing properties in the ultraviolet region were deposited by RF magnetron sputtering with different sputtering power (80-130 W). Fourier transform infrared absorption and X-ray photoelectron spectroscopy results suggested that the films were atomnic-level hybrids composed of B, 'C and N atoms. The compositions and transmission increasing properties of samples in the ultraviolet region were strongly influenced by sputtering power, which determined the transmission increasing properties in the ultraviolet region by changing compositions. And the lower the atomic number of C in the thin films, the better the transmission increasing properties in the ultraviolet region. The BCN thin films deposited at the sputtering power of 110 W possessed the lowest atonic number of C and the best transmission increasing properties in the ultraviolet region. And the increase in average transmissivity from 200 to 350 nm was about 40% compared with glass.