Epitaxial aluminum nitride thin films on 6H-silicon carbide, grown by magnetron sputter deposition
2000 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]
The research presented in this thesis is focused on epitaxial wurtzite-structure Aluminum Nitride (AlN) thin film synthesis, by ultra-high-vacuum (UHV) de magnetron sputter deposition, on Silicon Carbide (6H-SiC) substrates. The emphasis of the work has been put on controlling the growth and quality of the films to be able to use this material in electronic device applications.
The quality of epitaxial AlN films is significantly improved by using low energy ion assistance (Ei = 17-27 eV), during growth. The ion-assisted growth results in an increased surface mobility, which promotes domain boundary annihilation and epitaxial growth. This results in lateral expansion of column width (100 nm-wide at film thickness above 100 nm). The film characterization results show a very good crystal quality as well as high purity material. The measured concentrations of O, C, and Si in the film are at 3.5x1018, l. 3x1018 and 3.5xl 018 cm-3, respectively, which are among the purest AlN material as has been reported. The appearance of near band edge CL emission (6.02 eV at 4K) is also an evidence ofa high quality material.
Place, publisher, year, edition, pages
Linköping: Linköpings universitet , 2000. , p. 47
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 815
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:liu:diva-145906Libris ID: 7624499Local ID: LiU-TEK-LIC-2000:11ISBN: 9172196912 (print)OAI: oai:DiVA.org:liu-145906DiVA, id: diva2:1200206
Note
Most of the work has been done in the Thin Film Physics Division, Department of Physics and Measurement Technology, Linköping University, Sweden, except the secondary ion mass spectroscopy (SIMS) which are performed at the Analytical Instrumentation Facility, North Carolina State University, USA.
2018-04-232018-04-232023-03-13Bibliographically approved