Patent ID: 7569400

Claim:
A method of manufacturing a ferroelectric film including a ferroelectric shown by a general formula (Pb 1-d Bi d )(B 1-a X a )O 3 , B including at least one of Zr and Ti; X including at least one of Nb and Ta; “a” being in a range of “0.05≦a≦0.4”; “d” being in a range of “0<d<1”; and the method comprising: mixing a sol-gel raw material including a hydrolysis-condensation product of a metal alkoxide containing at least Zr and Ti, a polycarboxylic acid or a polycarboxylic acid ester, and an organic solvent; and forming a ferroelectric precursor solution including an ester bond by esterification of the polycarboxylic acid or a polycarboxylic acid derived from the polycarboxylic acid ester and the metal alkoxide.