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Journal of Electroceramics

, Volume 28, Issue 1, pp 74–79 | Cite as

Characteristics of short-channel amorphous In-Ga-Zn-O thin film transistors and their circuit performance as a load inverter

  • Jin-Seong Park
Article

Abstract

The characteristics of amorphous In-Ga-Zn-O(IGZO) thin film transistors (TFTs) and load inverters with a short channel length were studied. The IGZO TFTs showed a mobility value of > 5 cm2/Vs with a Vth value of -1.62 V. No degradation of the TFT properties, such as a negative shift of Vth or degradation of the subthreshold slope by the short-channel effect, were observed down to a channel length of 2 μm. A load inverter using an IGZO TFT with a gate length of 2 μm and resistor of 1 MΩ was fabricated and characterized, and a voltage gain of 4 was obtained at a VDD value of 10 V. Additionally, the action of a dynamic inverter operating at frequencies of 1 and 10 kHz was characterized. Complete inverter action was obtained at 1 kHz, while an delay time of 0.53 μs was observed at 10 kHz. These promising results indicate that short channel IGZO TFTs are candidate for TFTs in the display industry, including active-matrix organic light-emitting diodes or multi-view three-dimension TV.

Keywords

InGaZnO Oxide thin film transistor Short channel Load invertor 

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Copyright information

© Springer Science+Business Media, LLC 2012

Authors and Affiliations

  1. 1.Department of Materials Science and EngineeringDankook UniversityCheonanRepublic of Korea

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