Sp. Mcalister et al., DC AND TEMPERATURE-DEPENDENT CHARACTERISTICS OF INP DOUBLE-HETEROSTRUCTURE BIPOLAR-TRANSISTORS WITH QUATERNARY COLLECTOR, Electronics Letters, 29(16), 1993, pp. 1415-1417
The Letter reports the first study of the temperature dependence of th
e DC characteristics of InP-band double heterostructure bipolar transi
stors which have a quaternary collector. The quaternary layer was spac
ed away from the base-collector junction to improve the HBT characteri
stics. The devices exhibited useful gain over seen orders of magnitude
of current and had breakdown voltages of approximately 8 V. The DC ga
in decreased with decreasing temperature whereas the ideality factors
increased.