Figure 2

Variation in the IDG−VGS transfer characteristics for the (a) IGZO-TFT and (b) IGO-TFT with a lapse of stress time for 104 s under the DBS of 20 V.
A VDS of 10 V was applied for the measurements. The negative shift in VTH for the IGZO-TFT was 1.7 V after the DBS, contrary to the IGO-TFT, which showed almost no shift in VTH.