Electron beam annealing of ion implanted Al

Abstract
Pulsed electron beam annealing of Zn‐ and Sb‐implanted Al has been investigated with ion backscattering and transmission electron microscopy. The impurity redistribution produced by 50‐nsec pulses with deposited energies of 1.1 and 1.6 J/cm2 is shown to be due to diffusion in the liquid phase and provides an estimate of the melt time (∼300 nsec for 1.6 J/cm2). Comparison with conventional thermal annealing further supports an interpretation with uniform diffusion in the near‐surface region. In addition, precipitation of AsSb was found to occur within the liquid phase, which is consistent with the Al‐Sb phase diagram.

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