Anisotype, p+-GaAs/n-In0.15Ga0.85As heterojunction field-effect transistors, grown by molecular beam epitaxy and fabricated by a self-aligned process, have been investigated for digital logic applications. Peak transconductance of 411 mS/mm and a K-value of 292 mA/V2/mm were obtained for an enhancement-mode device with gate length of 1 mu m. Preliminary analysis of a nonisolated device leads to a cut off frequency of 17.5 GHz.
Published in:
Electronics Letters
(Volume:26
,
Issue:
13
)
Date of Publication: 21 June 1990