A buried p-layer in a GaAs MESFET channel is successfully formed by (Si, ME
) co-implantation and rapid thermal annealing process. The effects of co-im
plantation dose on the measured electrical activity are investigated: and t
he results on MESFET implantation profiles are also discussed, when Si and
ME are co-implanted in the semi-insulating (SI) GaAs substrates. These modi
fied profiles are calculated by considering electrical activation and diffu
sion of both Si and Mg in the SI GaAs. The results are compared with an n-l
ayer measured by the C-V and I-V techniques. (C) 2001 Elsevier Science B.V.
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