Topographic and Reflectometric Investigation of Crystallographic Defects and Surface Roughness in 4H Silicon Carbide Homoepitaxial Layers Deposited at Various Growth Rates

• Authors: W. Wierzchowski , K. Wieteska , K. Mazur , K. Kościewicz , T. Balcer , W. Strupiński , C. Paulmann
• Languages of publication: EN

Abstracts

EN

Undoped 4H silicon carbide epitaxial layers were deposited by means of CVD method with growth rates of 2 μm/h, 5 μm/h and 11 μm/h at 1540°C on n-doped 8°, 4° and 0° off-cut 4H-SiC (00·1) substrates. The structural defects were studied before and after growth of the epitaxial layers by means of conventional Lang topography, synchrotron white beam and monochromatic beam topography and by means of X-ray specular reflectometry. The topographic investigations confirmed the continuation of the dislocations in the epitaxial deposit on the 8° and 4° off-cut substrates without new extended defects. The important difference occurred in the surface roughness of the epitaxial layers, which increased for higher growth rates. The epitaxial layers grown on 0° off-cut substrates at analogous condition contained usually other SiC polytypes, but the influence of the growth rate on the distribution of the polytypes was observed.

Keywords

EN

61.05.cm; 61.72.Ff; 61.72.up

Discipline

• 61.05.cm: X-ray reflectometry (surfaces, interfaces, films)
• 61.72.up: Other materials
• 61.72.Ff: Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 4
• Pages: 915-919

Dates

published

2012-04

Contributors

author

W. Wierzchowski

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

K. Wieteska

• National Centre for Nuclear Research, Andrzeja Sołtana 7, 05-400 Otwock-Świerk, Poland

author

K. Mazur

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

K. Kościewicz

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

T. Balcer

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

W. Strupiński

• Institute of Electronic Materials Technology, Wólczyńska 133, 01-919 Warsaw, Poland

author

C. Paulmann

• HASYLAB at DESY, Notkestr. 85, 22603 Hamburg, Germany

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Identifiers

DOI

10.12693/APhysPolA.121.915