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A Study of $Al_2O_3$ :C Films on Si(100) Grown by Low Pressure MOCVD

Singh, MP and Thakur, CS and Bhat, N and Shivashankar, SA (2003) A Study of $Al_2O_3$ :C Films on Si(100) Grown by Low Pressure MOCVD. In: Novel Materials and Processes for Advanced CMOS. Symposium, Novel Materials and Processes for Advanced CMOS. Symposium, Boston, MA, USA, pp. 349-54.

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We report the characterization of carbonaceous aluminium oxide, $Al_2O_3$:C, films grown on Si(100) by metalorganic chemical vapor deposition. The focus is on the study of the effects of carbon on the dielectric properties of aluminium oxide in a qualitative manner. The carbon present in the aluminium oxide film derives from aluminium acetylacetonate used as the source of aluminium. As-grown films comprise nanometer-sized grains of alumina (~20-50 nm) in an amorphous carbonaceous matrix, as examined by X-ray diffractometry (XRD) and transmission electron microscopy (TEM). The films are shiny; they are smooth as observed by scanning electron microscopy (SEM). An attempt has been made to explore the defects (viz., oxide charge density) in the aluminium oxide films using room temperature high frequency capacitance-voltage (C-V) and current-voltage (I-V) measurements. The hysteresis and stretch-out in the high frequency C-V plots is indicative of charge trapping. The role of heteroatoms, as characterized by X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FTIR) spectroscopy, in the transport of charge in Al2O3:C films is discussed

Item Type: Conference Paper
Publisher: Material Research Society
Additional Information: Copyright of this article belongs to IEE.
Department/Centre: Division of Chemical Sciences > Materials Research Centre
Date Deposited: 10 Jul 2007
Last Modified: 27 Aug 2008 12:44
URI: http://eprints.iisc.ac.in/id/eprint/10402

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