In:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, American Vacuum Society, Vol. 24, No. 4 ( 2006-07-01), p. 1208-1212
Abstract:
Thin films of zirconium dioxide, ZrO2, have been deposited on silicon substrates by metal organic chemical vapor deposition using the single precursor zirconium 3-methyl-3-pentoxide, {Zr[OC(CH3)(C2H5)2]4, Zr(mp)4}, with no additional oxygen source, and the chemical vapor deposition reaction mechanism was also investigated. Zr(mp)4 is a liquid at room temperature and shows an excellent one-step weight loss and a low residual weight less than 3% in its thermogravimetric analysis. The deposition rate was found to be ∼13Å∕min at the substrate temperature of 300 °C with the activation energy of 33.5kJ∕mol, which was obtained at the moderate precursor temperature of 70 °C and 50 sccm of the N2 carrier gas. By gas chromatography/mass spectrometry and nuclear magnetic resonance analyses of the thermally decomposed vapor phase products collected during the deposition of ZrO2 films, it was clearly found that the ZrO2 films are grown via β-hydrogen elimination processes of the Zr(mp)4 single precursor. An x-ray photoelectron spectroscopy investigation of the ZrO2 films revealed an almost negligible carbon incorporation, which indicates that, except for the β-hydrogen elimination processes, no additional decomposition and/or recombination processes contributed to the growth of the ZrO2 films. The morphology, crystallinity, and electrical properties of the ZrO2 films were characterized by x-ray diffraction, scanning electron microscopy, and cap acitance-voltage measurements.
Type of Medium:
Online Resource
ISSN:
0734-2101
,
1520-8559
Language:
English
Publisher:
American Vacuum Society
Publication Date:
2006
detail.hit.zdb_id:
1475424-1
detail.hit.zdb_id:
797704-9
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