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Analysis of the transient body effect model for an LTPS TFT on a plastic substrate

Title
Analysis of the transient body effect model for an LTPS TFT on a plastic substrate
Authors
Choi, YunyeongLee, TaekyeongPark, JisunShin, Hyungsoon
Ewha Authors
신형순박지선
SCOPUS Author ID
신형순scopus; 박지선scopus
Issue Date
2021
Journal Title
SOLID-STATE ELECTRONICS
ISSN
0038-1101JCR Link

1879-2405JCR Link
Citation
SOLID-STATE ELECTRONICS vol. 175
Keywords
Flexible displayLTPS TFTTransient body effectSPICE modelPolyimide PIBody effectSimulation guideline
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
This work investigates the transient current in the subthreshold region of a low-temperature polycrystalline silicon thin-film transistor (LTPS TFT) on a polyimide (PI) substrate. The measurement of this current shows an instability that is not seen in the device on a glass substrate; the instability appears as a current variation under constant voltage and overshoot or undershoot under external stress voltage transitions. To explain this effect for a TFT on a PI substrate, a transient body effect (TBE) is suggested due to a threshold voltage shift caused by the charge distribution inside the substrate. A SPICE model is proposed based on this concept, and it shows excellent agreement with device measurements. The model offers a simulation guideline for LTPS TFTs on PI substrates.
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DOI
10.1016/j.sse.2020.107948
Appears in Collections:
엘텍공과대학 > 전자공학과 > Journal papers
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