Patent ID: 7449346

Claim:
A method of manufacturing a ferroelectric thin film, the method comprising: forming on a substrate a metal nitride-based precursor layer containing one selected from the group consisting of TiN, Zr x Ti (1-x) N (0<x<1), FeN, and NbN; forming on the metal nitride-based precursor layer a mixed gas atmosphere containing oxygen (O 2 ) and one reactive gas selected from the group consisting of PbO(g), Bi 2 O 3 (g), and K 2 O(g); and annealing the metal nitride-based precursor layer in the mixed gas atmosphere and forming a ferroelectric thin film containing one selected from the group consisting of PbTiO 3 , PbZr 2 Ti (1-x) O 3 (0<x<1), Bi 2 Ti 2 O 7 , Bi 4 Ti 3 O 12 , BiFeO 3 , and KNbO 3 .