Title
Bias Stress Stability of ITO Transistors and its Dependence on Dielectric Properties
Abstract
Amorphous oxide semiconductors (AOS) can be processed at low-temperature and their field-effect transistors (FETs) have demonstrated very low off-state current [1], offering promise for low-power back-end-of-line (BEOL) applications. Indium tin oxide (ITO) FETs have recently shown good characteristics [2] and good mobility (>50 cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> V <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−1</sup> s <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">−1</sup> [3]), but their stability and degradation remain unknown, e.g. given the mobility-stability trade-off in AOS [4], [5]. Here we investigate, for the first time, the influence of gate dielectric material and thickness on ITO-FET stability, which impacts bias stress through trap states. We find that HfO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> is more stable than Al <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> O <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> as a gate dielectric for ITO FETs, which contradicts previous stability studies of other AOS.
Year
DOI
Venue
2022
10.1109/DRC55272.2022.9855789
2022 Device Research Conference (DRC)
Keywords
DocType
ISSN
bias stress stability,ITO transistors,dielectric properties,amorphous oxide semiconductors,field-effect transistors,off-state current,low-power back-end-of-line applications,BEOL,mobility-stability trade-off,AOS,gate dielectric material,ITO-FET stability,trap states,stability studies,indium tin oxide FET,indium tin oxide,ITO,HfO2
Conference
1548-3770
ISBN
Citations 
PageRank 
978-1-6654-9884-5
0
0.34
References 
Authors
0
10
Name
Order
Citations
PageRank
Lauren Hoang100.34
Alwin Daus200.34
Sumaiya Wahid300.34
Jimin Kwon400.34
Jung-Soo Ko500.34
Shengjun Qin600.34
Mahnaz Islam700.34
Krishna C. Saraswat818630.79
H.-S Philip Wong900.34
Eric Pop105012.07