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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/100/1805

Title: Low temperature silicon nitride deposited by Cat-CVD for deep submicron metal-oxide-semiconductor devices
Authors: PATIL, SB
KUMBHAR, A
WAGHMARE, P
RAO, VR
DUSANE, RO
Keywords: chemical-vapor-deposition
microcrystalline silicon
films
Issue Date: 2001
Publisher: ELSEVIER SCIENCE SA
Citation: THIN SOLID FILMS,395,270-274
Abstract: Silicon nitride as a gate dielectric can improve the performance of ULSI CMOS devices by decreasing the gate leakage currents. In this paper we report a a-SiN:H gate dielectric fabricated using Cat-CVD at a relatively low substrate temperature of similar to 250 degreesC, using silane and ammonia as the source gases. The films were deposited at various gas pressures, (NH3/SiH4) flow rate ratios and at different filament temperatures (T-F). The deposition parameters, i.e. total gas pressure and gas composition (silane+ammonia) were optimized to deposit insulating and transparent films with high break-down strength. The structural properties of these films were studied by Fourier transform infrared (FTIR) spectroscopy and ultraviolet-visible (UV-vis) spectroscopy. Films with bandgap as high as 5.5 eV were obtained. The optimized conditions were used to deposit ultrathin films of the order of 8 rim thickness for deep-submicron CMOS technology. Electrical properties such as C-V and I-V measurements were studied on metal-nitride-semiconductor (MNS) capacitor structures. These characterization results on MNS capacitors show break-down fields of the order of 10 MV cm(-1) and good interface properties. (C) 2001 Elsevier Science BN. All rights reserved.
URI: http://dx.doi.org/10.1016/S0040-6090(01)01281-0
http://dspace.library.iitb.ac.in/xmlui/handle/10054/15053
http://hdl.handle.net/100/1805
ISSN: 0040-6090
Appears in Collections:Proceedings papers

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