Fig. 1. Equivalent circuit diagram of GOA critical TFT device

Fig. 2. M2 transfer characteristic curves

Fig. 3. Equivalent circuit diagram of pulse simulation test and sequence diagram of each test signal

Fig. 4. PU waveform of pulse simulation when VGH=34 V

Fig. 5. M2 transfer characteristic curves at different pulse time when VGH=34 V（inset：V_th variation with time）

Fig. 6. M2 transfer characteristic curve under Pulse at different VGH for 10 min（inset：V_th variation with VGH）

Fig. 7. PU waveform of different pulse experiments at different VGHand M2 transfer characteristic curves after 10 min pulse.（a）PU waveform at different Inputvoltage（b）M2 transfer characteristic curve at different Input voltage pulse；（c）PU waveform at different CLK voltages；（d）M2 transfer characteristic curve under different CLK voltage pulses.

Fig. 8. Cross-section diagram of IGZO-TFT

Fig. 9. M2 transfer characteristic curves after heating at 230 ℃ for 20 min

Fig. 10. M2 transfer characteristic curves after 17 h pulse at VGH=30 V and LVGL=-10 V