Patent ID: 6984417

Claim:
A method of fabricating a ferroelectric PZT film on a substrate, comprising selecting MOCVD conditions for producing a ferroelectric PZT material, and forming the film by liquid delivery MOCVD on the substrate under said MOCVD conditions for producing said ferroelectric PZT material, wherein said selecting MOCVD conditions comprises: establishing a correlative empirical matrix of plots of each of ferroelectric polarization, leakage current density, and atomic percent lead in PZT films, as a function of each of temperature, pressure and liquid precursor solution A/B ratio, wherein A/B ratio is the ratio of Pb to (Zr+Ti); identifying from said plots an inflection point of each plot, wherein a region of operation with respect to independent process variables of temperature, pressure and liquid precursor solution A/B ratio corresponds to the inflection point or a vicinity thereof; and conducting the liquid delivery MOCVD at temperature, pressure and liquid precursor solution A/B ratio values selected from said region of operation.