Actas de congresos
Morphological And Electrical Study Of Poly-sige Alloy Deposited By Vertical Lpcvd
Registro en:
Proceedings - Electrochemical Society. , v. PV 2005-08, n. , p. 188 - 196, 2005.
2-s2.0-31844438333
Autor
Teixeira R.C.
Doi I.
Zakia M.B.P.
Diniz J.A.
Institución
Resumen
In this paper authors report morphological and deposition analysis of polySiGe thin films by means of AFM, SEM and Raman measurements and electrical characteristics of MOS capacitors using poly-SiGe electrodes. The samples were deposited in a pancake vertical LPCVD system using Silane and Germane as precursor gases in a Hydrogen carrier flow. The process pressure was 5 or 10 Torr, in a temperature range from 500°C to 750°C. Surface RMS roughness, grain size and deposition rate are evaluated. We found that very uniform films can be obtained, with rms roughness below 4 nm and grain size below 50 nm. Deposition rates as high as 1500 Å/min are achieved. The deposited samples presented Rs values well bellow similar poly-Si films and electrical characterization shows poly-SiGe as a suitable material for MOS devices. PV 2005-08
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