期刊
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
卷 210, 期 4, 页码 796-801出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssa.201228656
关键词
magnetron sputtering; microstructure; plasma-enhanced chemical vapor deposition; SiO2; thin films; TiO2
资金
- Junta de Andalucia [P09-CTS-5189, TEP5283, P10-FQM-6900]
- Ministry of Economy and Competitiveness [CONSOLIDER CSD2008-00023, MAT2010-21228, MAT2010-18447]
We have deposited TiO2 and SiO2 thin films by techniques as different as plasma-enhanced chemical vapor deposition (PECVD) and reactive magnetron sputtering under experimental conditions where highly directional deposition fluxes are avoided. The results indicate that whatever the deposition technique employed or even the precursor gas in the PECVD technique, films share common microstructural features: a mounded surface topography and a columnar arrangement in the bulk, with the column width growing linearly with film thickness. With the help of a Monte Carlo model of the deposition, we conclude that these common aspects are explained by solely taking into consideration the incorporation of a low-energy, isotropically directed, deposition flux onto a substrate at low temperature and under a weak plasma/surface interaction environment.
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