Heavily Te-Doped GaAs Layers by Plasma-Assisted Epitaxy

Abstract
N-type GaAs layers, which were heavily doped with Te above 2×1019 cm-3, were epitaxially grown on (100)GaAs at a substrate temperature around 550°C by plasma-assisted epitaxy. These n+-GaAs layers showed mirror faced surface and their Hall mobilities were about 900 cm2/Vsec. These characteristics were not changed by annealing at 550°C for 10 min. The present technology has potential use for the formation of non-alloyed ohmic contacts.