Deconvolution of Hot Carrier and Cold Carrier Injection in ZnO TFTs
2020
Positive bias instability stress (PBI) and hot carrier injection stress (HCI) was done on ZnO thin-film transistors (TFTs) with 100°C Al 2 O 3 . The threshold voltage (V T ), transconductance (g m ), and subthreshold slope (SS) were monitored. HCI stress with two intermittent sense measurements where the first I DS -V GS is measured at the drain contact and the second is measured at the source contact to separate the contribution of the hot carrier and cold carrier injection on the V T shift. PBI stress was done to determine the viability of the carrier injection separation using only HCI.
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