Patent ID: 8158197
Filing Date: 2012-04-17
Classification: C23C,H01L

Abstract:
1. A method for forming a tantalum nitride film comprising the steps, according to the CVD technique, of simultaneously introducing a raw gas consisting of a coordination compound constituted by an elemental tantalum (Ta) having a coordinated ligand represented by the general formula: N═(R, R′) (in the formula, R and R′ may be the same or different and each represents an alkyl group having 1 to 6 carbon atoms) and a halogen gas into a film-forming chamber to thus form, on a substrate, a film of a halogenated compound represented by the following general formula: TaN x (Hal) y (R, R′) z (in the formula, Hal represents a halogen atom), reacting the halogenated compound film with a hydrogen atom-containing gas by the introduction thereof into the chamber, to remove N atoms bonded to Ta atoms in the film through cleavage, to remove the halogen atoms and/or the R(R′) groups bonded to N atoms in the film through cleavage and to thus form a tantalum nitride film rich in tantalum atoms.