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Kinetics of residual doping in 4H-SiC epitaxial layers grown in vacuum
KTH, Tidigare Institutioner                               , Mikroelektronik och informationsteknik, IMIT.ORCID-id: 0000-0002-0292-224X
Vise andre og tillknytning
2002 (engelsk)Inngår i: Journal of Crystal Growth, ISSN 0022-0248, E-ISSN 1873-5002, Vol. 240, nr 04-mar, s. 501-507Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Investigation on residual Al, B, and N co-doping of 4H-SiC epitaxial layers is reported. The layers were produced by sublimation epitaxy in Ta growth cell environment at different growth temperatures and characterized by secondary ion mass spectrometry. The vapor interaction with Ta was considered through calculations of cohesive energies of several Si-, Al-, B-, and N-containing vapor molecules and also of diatomic Ta-X molecules. An analysis of kinetic mechanisms responsible for impurity incorporation is performed. Among residuals, B exhibits a stronger incorporation dependence on temperature and growth at lower temperatures can favor B decrease in the layers. Under the growth conditions in this study (Ta environment and presence of attendant Al and N), B incorporation is assisted by Si2C vapor molecule. Boron tends to occupy carbon sites at higher temperatures, i.e. higher growth rates.

sted, utgiver, år, opplag, sider
2002. Vol. 240, nr 04-mar, s. 501-507
Emneord [en]
doping, impurities, vapor phase epitaxy, inorganic compounds, semiconducting materials, sublimation epitaxy, ta-container, crystals
Identifikatorer
URN: urn:nbn:se:kth:diva-21588ISI: 000175912000027OAI: oai:DiVA.org:kth-21588DiVA, id: diva2:340286
Merknad
QC 20100525Tilgjengelig fra: 2010-08-10 Laget: 2010-08-10 Sist oppdatert: 2017-12-12bibliografisk kontrollert

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Linnarsson, Margareta K.

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