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High Quality Gate Insulator for Very-Low Temperature Poly-Si TFT Employing Nitrous Oxygen Plasma Pre-Treatment

  • Moon Young Shin (a1), Sang-Myeon Han (a1), Min-Cheol Lee (a1), Hee-Sun Shin (a1), Min-Koo Han (a1), Jang-Yeon Kwon (a2) and Takashi Noguchi (a2)...

We have proposed nitrous oxide (N2O) plasma pre-treatment in order to reduce the oxide charge densities as well as to increase the breakdown field of silicon dioxide film for flexible display. Our experimental results show that the proposed treatment improved both the flat-band voltage from –3V to –1.8V and the breakdown voltage of gate oxide from 7MV/cm to 9.5MV/cm, respectively. The proposed treatment also improved poly-Si TFT characteristics such as low sub-threshold swing of 0.43V/dec.

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