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In this paper, a fully passivated InP/GaAsSb/InP DHBT on InP substrate with excellent DC and RF performance is developed. The epi-layers are grown by the MOCVD technique, with a base layer of 25nm and a collector layer of 130nm. The emitter width of the transistor is 0.35µm and the base contact is 0.3µm wide. The base and emitter contacts present an excellent contact resistivity. The current gain...
In this letter, we report on high-speed InAlAsSb/InGaSb/InAlAsSb double heterojunction bipolar transistors (HBTs) (DHBT) fabricated using a conventional triple-mesa process. Current gain cutoff frequencies fT of 52 GHz and maximum oscillation frequencies fMAX of 48 GHz were extracted from measured scattering parameters for devices with 1 ??15 ??m2 emitter size. To the best of our knowledge, these...
AlxIn1-XP/GaAs0.51Sb0.49 DHBTs with various aluminum contents have been grown by MBE. This was motivated by the poor current gain of the InP/GaAsSb structure. From x = 0.00 to 0.30 the best result is obtained with x = 0.25 with a current gain around 6 times higher.
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