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NTIS 바로가기Journal of the Electrochemical Society : JES, v.143 no.10, 1996년, pp.3251 - 3256
Bouteville, A. (Laboratoire de Physico‐) , Imhoff, L. (Chimie des Surfaces, Ecole Nationale Supé) , Remy, J. C. (rieure d'Arts et Mé)
A thermodynamic study of titanium nitride formation on a patterned oxidized silicon substate in the TiCl4<>NH3-H2 gaseous phase was carried out. Calculations were performed in the temperature range of 700-1300 K and in the total pressure range of 27-133 Pa. On a silicon oxide surface, TiN formation occurs according to a three-step mechanism involving TiCl3 formation as an intermediate compound. On a TiN surface, the deposition occurs in the same manner. On a silicon surface, titanium disilicide or silicon nitride are the only condensed phases obtained at equilibrium in the TiCl4<>-rich and NH3-rich cases, respectively. Because silicon diffusion is allowed through TiSi2<> and not through Si3N4<>, TiN can only grow on a Si3N4<> surface. In spite of the fact that Si3N4<> is not conductive, the formation of a thin Si3N4<> covering layer is necessary for TiN growth. Calculations show that the best TiN yield is obtained with an ammonia-rich gaseous phase at a deposition temperature of about 1100 K.(Author abstract)
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