Multiply scanned electron beam annealing of dual implants in GaAs

Abstract
A multiply scanned electron beam has been used to anneal dual implants of (Ga + Se) in GaAs. The implants were performed at room temperature, the dose being 9 × 1013 ions cm2 for both gallium and selenium ions. The percentage electrical activity was found to correlate with a decrease in dislocation density with increasing exposure time and majority of dislocations were perfect, interstitial loops with Burgers vectors of a/2 ⟨110⟩.