Diamond synthesis by DC thermal plasma CVD at 1 atm |
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Authors: | Z P Lu L Stachowicz P Kong J Heberlein E Pfender |
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Institution: | (1) Department of Mechanical Engineering, University of Minnesota, 55455 Minneapolis, Minnesota;(2) Idaho National Engineering Laboratory, 83415 Idaho Falls, Idaho |
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Abstract: | Diamond crystals and films have been success full y synthesized by DC thermal plasma jet CVD at a pressure of I atrn. A novel triple torch plasma reactor has been used to generate a convergent plasma volume to entrain the participating gases. Three coalescing plasma jets produces! by this reactor direct the dissociated and ionized gaseous species onto ( 100) silicon wafer substrates where the diamond grows. In a typical 10-min run, depending on the method of .substrate preparation, either microcrystals with sizes up to 8 m or continuous films with thicknesses of 1–2 m have been obtained. X-ray diffraction, scanning electron microscopy, and Raman spectroscopy have been used for the characterization of the crystals and of the films. |
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Keywords: | Diamond plasma synthesis atmospheric pressure triple-torch plasma reactor |
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