Patent ID: 7772132

Claim:
A method for forming a zirconium oxide (ZrO 2 ) layer over a substrate in a chamber, comprising: controlling a temperature of the substrate; and repeating a unit cycle of an atomic layer deposition (ALD) method, the unit cycle comprising: supplying a zirconium (Zr) source into the chamber, parts of the Zr source being adsorbed into a surface of the substrate, purging parts of the Zr source remaining inside the chamber, supplying a reaction gas for reacting with the adsorbed parts of the Zr source, and purging non-reacted parts of the reaction gas remaining inside the chamber and reaction byproducts, wherein the temperature of the substrate and a concentration of the reaction gas are controlled such that the ZrO 2 layer is formed with a tetragonal structure, wherein controlling a temperature of the substrate comprises controlling the temperature of the substrate to be in a range from approximately 250° C. to approximately 350° C., and wherein supplying the reaction gas comprises supplying ozone (O 3 ) gas having a concentration of at least approximately 150 g/m 3 .