Patent ID: 7217617

Claim:
A method of forming a capacitor having a capacitor dielectric layer comprising ABO 3 , where “A” is selected from the group consisting of Group IIA and Group IVB metal elements and mixtures thereof, where “B” is selected from the group consisting of Group IVA elements and mixtures thereof, the method comprising: feeding a plurality of precursors comprising A, B and O to a chamber having a substrate positioned therein under conditions effective to chemical vapor deposit an ABO 3 -comprising dielectric layer over the substrate; during the feeding, varying pressure within the chamber effective to produce different concentrations of B at different elevations in the deposited layer and where higher comparative pressure produces greater concentration of B in the deposited layer; and incorporating the ABO 3 -comprising dielectric layer into a capacitor, the ABO 3 -comprising dielectric layer comprising a capacitor dielectric layer of the capacitor and having a dielectric constant k of at least 20 in the capacitor.