Browsing by Author "Li, Yi-Chieh"

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Dimension dependent immunity of X-ray irradiation on low-temperature polycrystalline-silicon TFTs
(2017-06-01)
Wei, Yin-Chang
;
Li, Yi-Chieh
;
Lee, I-Che
;
Cheng, Huang-Chung
;
電子工程學系及電子研究所
Typically, each element in a large-area flat-panel X-ray image sensor consists of a photodetector and amorphous silicon (a-Si) thin-film transistor (TFT) switches. In order to reduce noise, increase sensor dynamic range, and increase carrying capacity, the low-temperature polycrystalline-silicon (LTPS) TFTs have been proposed as a candidate to replace the a-Si TFTs. However, there are concerns regarding the impact of X-ray radiation in LTPS-TFTs, and several studies have been conducted to inquire into the same. In this paper, we show that LTPS TFTs with small channel length (<2 mu m) are almost immune to X-ray radiation. (C) 2017 The Japan Society of Applied Physics