Physics of the Solid State
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Change of the elastic strain in SiC films growing on Si substrates by the method of consistent atomic substitution
Eremeev I. A.1, Vorobev V.G.1, Grashchenko A. S.
2, Semencha A.V.
3, Osipov A. V.
1, Kukushkin S. A.
1
1Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences, St. Petersburg, Russia
2St. Petersburg State University, St. Petersburg, Russia
3Peter the Great Saint-Petersburg Polytechnic University, St. Petersburg, Russia
2St. Petersburg State University, St. Petersburg, Russia
3Peter the Great Saint-Petersburg Polytechnic University, St. Petersburg, Russia
Email: iuriyeremeev528@gmail.com, vmaximg@bk.ru, asgrashchenko@bk.ru, vil-l@yandex.ru, andrey.v.osipov@gmail.com, sergey.a.kukushkin@gmail.com
Sequential stages of synthesis of SiC epitaxial films on n- and p-type Si(111) substrates in a mixture of carbon monoxide and silane are studied by X-ray diffraction (XRD) and Raman scattering methods. It was found that the elastic strain in SiC films grown on n-type Si(111) is absent in contrast to SiC films grown on p-type Si(111), where the deformations are formed and completely relaxed by the 40 min of synthesis. A dramatic change in the SiC film structure is observed on the third minute of the growth, which is associated with the formation and growth of pores in the SiC layer. Differences in the lattice constants of SiC films grown on p- and n-type Si substrates are determined and verified via analysis of the change in the curvature of SiC/Si wafers. Keywords: Silicon carbide on silicon, elastic strain, nanostructures, microstructure evolution.
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