The dual-seed-crystal method is developed and used to study the growth
of 4H- and 6H-SiC boule crystals by varying particular growth paramet
ers, e.g. the distance between the growth front and the source materia
l and the face polarity of the seeds. A range of values is elaborated
for a series of growth parameters, which leads to the growth of single
crystals. The grown SiC crystals are electrically and optically chara
cterized, (C) 1997 Elsevier Science S,A.