Ageing and thermal recovery of advanced SiGe heterojunction bipolar transistors under long-term mixed-mode and reverse stress conditions
Long-term ageing behavior of SiGe HBTs under mixed-mode and reverse stress studied. Saturation of ageing rate and different thermal behavior under both stress types discussed. Results put together into ageing function for use in compact models. Recovery of stressed HBTs by high-temperature anneal within one hour.
thermal recovery sige heterojunction bipolar transistors reverse stress hot carrier injection mixed-mode stress