In-situ monitoring for CVD processes
Hopfe, V, Sheel, DW, Spee, CIMA, Tell, R, Martin, P, Beil, A, Pemble, ME, Weiss, R, Vogt, U and Graehlert, W 2003, 'In-situ monitoring for CVD processes' , Thin Solid Films, 442 (1-2) , pp. 60-65.
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Aiming towards process control of industrial high yield/high volume CVD reactors, the potential of optical sensors as a monitoring tool has been explored. The sensors selected are based on both Fourier transform infrared spectroscopy (FTIR) and tunable diode laser spectroscopy (NIR-DLS). The former has the advantage of wide spectral capability, and well established databases. NIR-DLS spectroscopy has potentially high sensitivity, laser spatial resolution, and the benefits of comparatively easier integration capabilities-including optical fibre compatibility. The proposed technical approach for process control is characterised by a 'chemistry based' feedback system with in-situ optical data as input information. The selected optical sensors continuously analyze the gas phase near the surface of the growing layer. The spectroscopic data has been correlated with process performance and layer properties which, in turn establish data basis for process control. The new process control approach is currently being verified on different industrialised CVD coaters. One of the selected applications deals with the deposition of SnO2 layers on glass based on the oxidation of (CH3)2SnCl2, which is used in high volume production for low-E glazing.
|Uncontrolled Keywords:||Chemical vapour deposition (CVD), fourier transform infrared spectroscopy (FTIR), tin oxide, diode laser spectroscopy (DLS)|
|Themes:||Subjects / Themes > Q Science > QD Chemistry|
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Science & Technology|
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
|Journal or Publication Title:||Thin Solid Films|
|Depositing User:||H Kenna|
|Date Deposited:||03 Sep 2007 14:25|
|Last Modified:||27 Sep 2011 12:27|
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