Patent ID: 8105468
Filing Date: 2012-01-31
Classification: C23C,H01L

Abstract:
1. A method for forming a tantalum nitride film comprising the steps of: 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 NH adsorbing the raw gas and NH reacting the surface adsorption film containing the reduced compound with H radicals derived from an H atom-containing gas to break the Ta—N bonds and to break and remove the remaining R(R′) groups bonded to the N atoms in the foregoing reduced compound; and alternately repeating the adsorption step and the reaction step to form a tantalum nitride film rich in tantalum atoms.