J. Vanhellemont et al., IMPLANTATION TEMPERATURE-DEPENDENT DISTRIBUTION OF NISI2 FORMED BY ION-BEAM SYNTHESIS IN SILICON, Applied physics letters, 62(22), 1993, pp. 2795-2797
The formation and distribution of NiSi2 in (111) silicon by Ni-ion imp
lantation with a fluence of 1.1 X 10(17) cm-2 and an energy of 90 keV
is studied as a function of the temperature during implantation. For t
emperatures below 200-degrees-C, a buried layer of NiSi2 precipitates
is formed. Increasing the temperature gradually from 200 to 350-degree
s-C leads first to the formation of a double buried NiSi2 layer which
with increasing temperature evolves into an epitaxial NiSi2 surface la
yer. A tentative model to explain for the observed anomalous behavior
is presented.