D. Dieci et al., Electric-field-related reliability of AlGaAs/GaAs power HFETs: Bias dependence and correlation with breakdown, IEEE DEVICE, 48(9), 2001, pp. 1929-1937
This work shows experimental and simulated data of hot electron degradation
of power AlGaAs/GaAs HFETs with different gate lengths and recess widths,
and uses them to infer general indications on the bias and geometry depende
nce of the device high-field degradation, the meaningfulness of the break-d
own voltage figure of merit from a reliability standpoint, and the physical
phenomena taking place in the devices during the stress and leading to per
formance degradation. Possible formulations of a voltage-acceleration law f
or lifetime extrapolation are also tested.