Patent ID: 6982103

Claim:
A chemical vapor deposition method of forming a barium strontium titanate-comprising dielectric layer having a varied concentration of barium and strontium within the layer, comprising: providing barium and strontium to a substrate by flowing at least one metal organic precursor to the substrate, and providing titanium to the substrate, and flowing a constant composition oxidizer stream to the substrate, under conditions effective to deposit a barium strontium titanate-comprising dielectric layer on the substrate; the barium and strontium being provided to the substrate during all of the deposit of said layer at a substantially constant atomic ratio of barium to strontium; and during said deposit, changing a rate of flow of the constant composition oxidizer stream to the substrate at least once to effect a change in relative atomic concentration of barium to strontium within the deposited barium strontium titanate-comprising dielectric layer.