Patent ID: 7135421

Claim:
A method of forming a dielectric film comprising: forming a layer of hafnium aluminum oxide by atomic layer deposition including: pulsing a hafnium containing precursor into a reaction chamber containing a substrate, the reaction chamber substantially without another reactant precursor during the pulsing of the hafnium containing precursor, the hafnium containing precursor having a composition without aluminum; and pulsing an aluminum containing precursor into the reaction chamber, the reaction chamber substantially without another reactant precursor during the pulsing of the aluminum containing precursor, the aluminum containing precursor having a composition without hafnium, wherein pulsing the hafnium containing precursor and pulsing the aluminum containing precursor is performed during an atomic layer deposition cycle to form hafnium aluminum oxide and after pulsing the hafnium containing precursor and after pulsing the aluminum containing precursor the reaction chamber is subjected to a process selected from a group consisting of evacuating the reaction chamber, purging the reaction chamber with a purging gas, and a combination of evacuating and purging the reaction chamber.