Patent ID: 7560395

Claim:
A method comprising: forming a source region and a drain region separated by a body region; forming a gate; and forming a dielectric layer above the body region and below the gate, the dielectric layer containing a hafnium tantalum oxide layer, the hafnium tantalum oxide being a bimetal oxide, the hafnium tantalum oxide layer formed as one or more monolayers by a layer-by-layer process having a plurality of cycles, each cycle including: introducing a precursor containing hafnium to a substrate; and introducing a precursor containing tantalum to the substrate such that a purging process is performed between introducing the precursor containing hafnium and introducing the precursor containing tantalum, wherein introducing each precursor is performed at a pressure, a substrate temperature, and pulsing parameters selected individually for each precursor to form hafnium titanium oxide in the cycle.