For the the growth of boron-containing compounds by CVD, various classes of boron compounds have beed used, such as halides, B2H6 and borhydrides, boron alkyls, alkoxides.
For example, for boron nitride thin films, mixtures of a boron-containing precursor (B2H6 or BCl3, BF3), and N2 or NH3 as source of nitrogen, and hydrogen and chlorine as coreactants and noble gases as carrier, are applied for c-BN deposition. The review of this area has been given by Konyashin et al. [[i]]
[i] Igor Konyashin,* Joachim Bill, and Fritz Aldinger
Chem. Vap. Deposition 1997,3, No. 5, “ Plasma-Assisted CVD of Cubic Boron Nitride”
http://www.researchgate.net/profile/I_Konyashin/publication/247950388_Plasma-assisted_CVD_of_cubic_boron_nitride/links/54d1cd2f0cf25ba0f041d07c.pdf