Patent ID: 8404314

Claim:
A thin-film forming method comprising: introducing a compound having a borazine skeleton into a portion above a substrate placed inside a reaction chamber; applying a negative charge to a feeding electrode that supports said substrate placed inside said reaction chamber; generating a plasma inside said reaction chamber by generating a high frequency energy using a plasma generator arranged opposite to said feeding electrode via said substrate so that at the portion above said substrate said compound is brought into a reaction active state with the borazine skeleton being maintained therein; and selectively sweeping cations out of the active components of said compound in said reaction active state onto said substrate by said negative charge applied to said feeding electrode and successively bonding the borazine skeletons of said cations to a film on said substrate and polymerizing the borazine skeletons to be deposited on said substrate, wherein said compound having a borazine skeleton is indicated by the following Formula (1): in which R 1 to R 6 are identical or different from one other, and respectively selected from the group consisting of a hydrogen atom, and an alkyl group, an alkenyl group and an alkynyl group each having carbon atoms of 1 to 4, independently, with at least one of R 1 to R 6 being not a hydrogen atom, wherein the voltage applied to the feeding electrode is −600V to −200V and a power of the high frequency energy generated by the plasma generator is 250 to 1500 W.