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MOCVD Precursor Delivery Monitored and Controlled Using UV Spectroscopy

Published online by Cambridge University Press:  15 February 2011

Brian J. Rappoli ,
William J. DeSisto ,
Tobin J. Marks  and
John A. Belot
Brian J. Rappoli
Affiliation:
Chemistry Division and Electronics Science and Technology Division, Naval Research Laboratory, Washington, DC. 20375
William J. DeSisto
Affiliation:
Chemistry Division and Electronics Science and Technology Division, Naval Research Laboratory, Washington, DC. 20375
Tobin J. Marks
Affiliation:
Department of Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, IL. 60208
John A. Belot
Affiliation:
Department of Chemistry and Science and Technology Center for Superconductivity, Northwestern University, Evanston, IL. 60208
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Abstract

The glyme adducts of bis(1,1,1,5,5,5-hexafluoro-2,4-pentanedionate)barium, Ba(hfac)2•glyme, are frequently employed as precursors in the MOCVD fabrication of HTSC thin films. The physical properties of these precursors can be modified by changing the glyme ligand in the barium complex. In this study, gas phase concentrations of two barium complexes as a function of purge time and bubbler temperature have been examined by in-situ UV spectroscopy. Also presented are the details of a UV spectrophotometric-based feedback control system designed to maintain constant gas phase concentration of 2,2,6,6-tetramethyl-3,5-heptadionate (thd) precursors, Cu(thd)2 and Y(thd)3, during MOCVD growth of mixed metal oxide films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 474: Symposium L – Epitaxial Oxide Thin Films III , 1997 , 69
Copyright
Copyright © Materials Research Society 1997

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References

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