Scanning Eectron Beam Annealing of Oxygen Donors in Czochralski Silicon

Abstract

The destruction of the oxygen donor complex in Czochralski silicon has been studied using scanning electron beam annealing in the range 550°C to 1050° C for 5s to 1000s. A two stage annealing schedule ensured a rapid rise to the target temperature and overscanning provided a uniform, non-distorting heating field. Four point probe and spreading resistance measurements showed a very rapid donor destruction rate above 650° C; between 550° C and 650°C the lower donor destruction rate allowed a study of the annealing behaviour.