Pulsed electron beam annealing of ion implanted Si layers

Abstract
Pulsed electron beam annealing (PEBA) of ion implanted Si layers was investigated by MeV 4He+ backscattering and TEM techniques. Silicon substrates, (100) and (lll) in orientation, were implanted either with 28Si+ ions or As ions, and another set of samples was implanted with both ions. The implantation energy ranged between 50 and 200 keV with a total dose of 5 × 1015/cm2 It was found that electron beam. annealing is effective in reordering ion-damaged layers in some cases where thermal annealing (∼ 550°C) is not. Pulsed electron beam annealing apparently causes melting of the surface region. The results show that the melt depth depends on the microstructure of the implanted layers.

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