Er ions were implanted into Si substrates using metal vapor vacuum arc (MEVVA) ion source implanter
and Er-doped Si thin films have been formed after rapid thermal annealing (RTA). It was analyzed by Rutherford back-scattering spectroscopy (RBS) that Er concentrations in the thin films were close to 10at% corresponding to the level of ~10 21 atoms/cm 3 and Er segregation in the surface layer of the thin films appeared with increasing the temperature of RTA. The recovery of irradiation damage
Er segregation and Si solid phase epitaxy of Si amorphous layers were closely dependent on annealing temperature
which would influence on photoluminescence around 1.54μm from Er-doped Si thin film.