Patent ID: 8256077
Filing Date: 2012-09-04
Classification: C23C,H01G,H01L,Y10T

Abstract:
1. A method for forming a capacitor dielectric, the method comprising: depositing a tantalum oxide layer over a substrate; performing a post-treatment on the tantalum oxide layer to provide the tantalum oxide layer with a tetragonal phase; and depositing a zirconium oxide layer over the tantalum oxide layer such that the zirconium oxide layer has a tetragonal phase, wherein depositing the tantalum oxide layer and depositing the zirconium oxide layer are performed using an atomic layer deposition process, wherein the atomic layer deposition process of the zirconium oxide layer is performed by repeating a first unit deposition cycle until the zirconium oxide layer has a thickness of approximately 40 Å to approximately 100 Å, the first unit deposition cycle comprising introducing a zirconium source, introducing a first purge gas, introducing a first reactant, and introducing a second purge gas.