High-performance amorphous gallium indium zinc oxide thin-film transistors through N2O plasma passivation

被引:118
作者
Park, Jaechul [1 ]
Kim, Sangwook [1 ]
Kim, Changjung [1 ]
Kim, Sunil [1 ]
Song, Ihun [1 ]
Yin, Huaxiang [1 ]
Kim, Kyoung-Kok [1 ]
Lee, Sunghoon [1 ]
Hong, Kiha [1 ]
Lee, Jaecheol [2 ]
Jung, Jaekwan [2 ]
Lee, Eunha [2 ]
Kwon, Kee-Won [3 ]
Park, Youngsoo [1 ]
机构
[1] Samsung Adv Inst Technol, Semicond Device Lab, Yongin, Gyeonggi Do, South Korea
[2] Samsung Adv Inst Technol, Analyt Engn Ctr, Yongin, Gyeonggi Do, South Korea
[3] Sungkyunkwan Univ, Dept Semicond Syst Engn, Suwon 440746, Gyeonggi Do, South Korea
关键词
D O I
10.1063/1.2962985
中图分类号
O59 [应用物理学];
学科分类号
摘要
Amorphous-gallium-indium-zinc-oxide (a-GIZO) thin filmtransistors (TFTs) are fabricated without annealing, using processes and equipment for conventional a-Si:H TFTs. It has been very difficult to obtain sound TFT characteristics, because the a-GIZO active layer becomes conductive after dry etching the Mo source/drain electrode and depositing the a-SiO2 passivation layer. To prevent such damages, N2O plasma is applied to the back surface of the a-GIZO channel layer before a-SiO2 deposition. N2O plasma-treated a-GIZO TFTs exhibit excellent electrical properties: a field effect mobility of 37 cm(2)/V s, a threshold voltage of 0.1 V, a subthreshold swing of 0.25 V/decade, and an I-on/off ratio of 7. (C) 2008 American Institute of Physics.
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页数:3
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