Abstract
AbstractMoisture contamination of HfO2 and ZrO2 ultrathin dielectric films, deposited by atomic layer chemical vapor deposition (ALCVD™), is investigated and compared to that of native SiO2. Results show that HfO2 and ZrO2 surfaces adsorb higher amounts of moisture and bind moisture more strongly than SiO2 surfaces. A multilayer model is developed to represent the dynamics of moisture interaction with these three oxides. Using this model, the fundamental kinetic parameters are determined. The adsorption rate constants are of the same order of magnitude for all three surfaces. However, the desorption rate constants for ZrO2 and HfO2 are almost three orders of magnitude lower than that for SiO2. Activation energies for desorption of water molecules from the first two layers are 33, 27, and 19 kJ/mol, for ZrO2, HfO2, and SiO2, respectively. Results obtained in this study suggest that the HfO2 and ZrO2, as the new dielectric materials, are more prone to moisture contamination than SiO2. © 2004 American Institute of Chemical Engineers AIChE J, 50: 1881–1888, 2004
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
