Ji. Song et al., POTENTIALLY HIGH-PERFORMANCE CARBON-DOPED GALNP GAAS HETEROJUNCTION BIPOLAR-TRANSISTORS WITH DIFFERENT COMPOSITIONAL BASE GRADINGS/, Electronics Letters, 30(7), 1994, pp. 605-606
The characteristics of carbon-doped GaInP/GaAs heterojunction bipolar
transistors (HBTs) with a compositionally-graded base are reported. Th
e characteristics of HBTs with three different linearly-graded AlxGa1-
xAs bases (x = 0 --> 0.1, 0 --> 0.2, 0 --> 0.3) are compared with thos
e of an HBT without base grading. Nearly ideal transistor characterist
ics were observed for x values up to 0.2, indicating possible high-spe
ed operation of graded base GaInP/GaAs HBTs.