The reaction of Co with epitaxial Si1-yCy(001) films is investigated with r
egard to dependence on annealing temperature and C concentration y. Resista
nce measurements and RBS analysis reveal a small increase in the disilicide
formation temperature. The electrical properties are very similar for thin
CoSi2 films grown at 650 degrees C on Si0.999C0.001 and on Si. Whereas the
CoSi2 is fully polycrystalline on Si(001), partially oriented CoSi2 has be
en observed on C-containing substrate layers. An increase of the number of
epitaxially grown CoSi2 crystallites has been observed with increasing C co
ncentration. (C) 2000 Elsevier Science B.V. All rights reserved.