Dependence of annealing on stability of transparent amorphous InGaZnO thin film transistor

Dependence of annealing on stability of transparent amorphous InGaZnO thin film transistor
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退火对透明非晶InGaZnO薄膜晶体管稳定性的依赖性

DOI:
10.1016/j.mssp.2013.02.013
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发表时间:
2013-10
影响因子:
4.1
通讯作者:
Zhang, Jianhua
Zhang, Jianhua
中科院分区:
工程技术3区
文献类型:
--
作者:
Li, Xifeng;Xin, Enlong;Chen, Longlong;Shi, Jifeng;Li, Chunya;Zhang, Jianhua

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在相对较低的温度(200℃)下成功制备了底栅透明IGZO-TFT。该器件在200℃下退火4h,具有良好的电学性能,饱和迁移率为8.2cm2V−1s−1,亚阈值摆幅为1.0V/dec,通断电流比为5×106。结果表明,后退火处理可以显著提高TFT器件的稳定性。施加20V的正栅极偏置应力5000s后,器件退火1h,显示出较大的正电压偏移4.7V。然而,器件退火4h后显示出更小的Vthshift,为0.04V,并且更加稳定。
Bottom-gate transparent IGZO–TFT had been successfully fabricated at relatively low temperature (200°C). The devices annealing for 4h at 200°C exhibit good electrical properties with saturation mobility of 8.2cm2V−1s−1, subthreshold swing of 1.0V/dec and on/off current ratio of 5×106. The results revealed that the stability of TFT devices can be improved remarkably by post-annealing treatment. After applying positive gate bias stress of 20V for 5000s, the device annealing for 1h shows a larger positive Vthshift of 4.7V. However, the device annealing for 4h exhibits a much smaller Vthshift of 0.04V and more stable.
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