Anomalous drain-induced barrier lowering effect of thin-film transistors due to capacitive coupling voltage of light-shield metal

Miryeon Kim, Hyungsoon Shin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The anomalous drain-induced barrier lowering (DIBL) effect of longchannel thin-film transistors (TFTs) with a light shield (LS) is investigated by two-dimensional (2D) device simulation. In long-channel TFTs with a LS, which is long enough to neglect the DIBL effect and the floating body effect, a decrease of threshold voltage (Vth) was observed at high drain voltages. The Vth lowering is due to the large potential of the LS induced by the high drain voltage which lowers the height of the source potential barrier. It is found that the LS-induced DIBL effect can be larger as the length of the LS increases or the thickness of the buried oxide decreases.

Original languageEnglish
Pages (from-to)1093-1095
Number of pages3
JournalElectronics Letters
Volume50
Issue number15
DOIs
StatePublished - 17 Jul 2014

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