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Viscous flow reactor with quartz crystal microbalance for thin film growth by atomic layer deposition

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3 Author(s)
Elam, J.W. ; University of Colorado, Boulder, Colorado 80309-0215 ; Groner, M.D. ; George, S.M.

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A chemical reactor was constructed for growing thin films using atomic layer deposition (ALD) techniques. This reactor utilizes a viscous flow of inert carrier gas to transport the reactants to the sample substrates and to sweep the unused reactants and reaction products out of the reaction zone. A gas pulse switching method is employed for introducing the reactants. An in situ quartz crystal microbalance (QCM) in the reaction zone is used for monitoring the ALD film growth. By modifying a commercially available QCM housing and using polished QCM sensors, quantitative thickness measurements of the thin films grown by ALD are obtained in real time. The QCM is employed to characterize the performance of the viscous flow reactor during Al2O3 ALD. © 2002 American Institute of Physics.

Published in:

Review of Scientific Instruments  (Volume:73 ,  Issue: 8 )