Analysis of negative bias temperature instability in body-tied low-temperature polycrystalline silicon thin-film transistors

Chih Yang Chen*, Ming Wen Ma, Wei Cheng Chen, Hsiao Yi Lin, Kuan Lin Yeh, Shen De Wang, Tan Fu Lei

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

13 Scopus citations

Abstract

Negative bias temperature instability (NBTI) degradation mechanism in body-tied low-temperature polycrystalline silicon thin-film transistors (LTPS TFTs) is analyzed by the charge-pumping (CP) technique. The properties of bulk trap states (including interface and grain boundary trap states) are directly characterized from the CP current. The increase of the fixed oxide charges is also extracted, which has not been quantified in previous studies of NBTI degradation in LTPS TFTs. The experimental results confirm that the NBTI degradation in LTPS TFTs is caused by the generation of bulk trap states and oxide trap states.

Original languageEnglish
Pages (from-to)165-167
Number of pages3
JournalIEEE Electron Device Letters
Volume29
Issue number2
DOIs
StatePublished - 02 2008
Externally publishedYes

Keywords

  • Charge-pumping (CP) technique
  • Low-temperature polycrystalline silicon thin-film transistors (LTPS TFTs)
  • Negative bias temperature instability (NBTI)

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