Abnormal Output Characteristics of p-Type Low Temperature Polycrystalline Silicon Thin Film Transistor Fabricated on Polyimide Substrate

作者：Lee Seok Woo; Park Chang Bum; Jeon Pyo Jin; Min Sung Wook; Lim June Yeong; Lee Han Sol; Yoo Jae Sung; Yoo Soon Sung; Im Seongil^*

来源：IEEE Journal of the Electron Devices Society, 2016, 4(1): 7-10.

DOI：10.1109/JEDS.2015.2493561

• Thin-film transistor (TFT)
• LTPS
• self-heating effect
• hot carrier effect
• polyimide (PI)
• flexible

We report on an abnormal output characteristics in p-type low temperature polycrystalline silicon thin-film transistors fabricated on polyimide (PI); negative differential conductance behavior is often observed in saturation region of drain current from large width devices. To understand such abnormal output characteristics, device dimension dependence was studied in a systematic way. As a result, we found that enhanced self-heating is mainly responsible originating from the poor thermal conductivity of PI substrate. A related degradation model is also proposed.

• 出版日期2016-1