“…Important materials being prepared by CVD for electronic and optic devices include Si, Ge, Si 3 N 4 , SiO 2 , GaAs, CdS, ZnSe, and related compounds (Spear (1982); Green and Levy (1985); Gentilman et al (1981); Hess et al (1985)). Superconducting materials such as Nb 3 Sn, Nb 3 Ge, and NbC x N y (Wahl and Schmanderer (1989)) and YBa 2 -Cu 3 O 7-δ (Kim et al (1991)). Erosion-and corrosionresistant coatings commonly applied by CVD to tooling materials are TiC, TiN, and Al 2 O 3 .…”