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Dopant Incorporation Efficiency in CVD Silicon Carbide EpilayersIn order to ensure reproducible and reliable SiC semiconductor device characteristics, controlled dopant incorporation must be accomplished. Some of the many factors which greatly influence dopant incorporation are the site-competition effect, SiC(0001) substrate polarity, substrate temperature, and the dopant-source reactor concentration. In this paper, dopant incorporation is considered and compared for various dopants in the context of dopant incorporation efficiency. By using secondary ion mass spectrometry (SIMS), the relative dopant incorporation efficiencies were calculated by dividing the SIMS determined dopant concentration in the resulting epitaxial layer by the intentional gas phase dopant concentration used during the SiC CVD. Specifically, the relative magnitudes of dopant incorporation efficiencies for nitrogen, phosphorus, and boron in 6H-SiC (0001) Si-face epitaxial layers are compared as a function of the site-competition effect and the dopant-source reactor concentrations. This serves as a first approximation for comparison of the relative 'doping potencies' of some common dopants used in SiC CVD epitaxial growth.
Document ID
Document Type
Reprint (Version printed in journal)
Larkin, D. J.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Mat. Res. Soc. Symp. Proc.
Publisher: Materials Research Society
Volume: 410
Subject Category
Solid-State Physics
Report/Patent Number
NAS 1.15:112756
Accession Number
Distribution Limits
Public Use Permitted.
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