Focused ion beam milling for the fabrication of 160 nm channel length IGZO TFTs on flexible polymer substrates
MetadataShow full item record
SubjectFabrication technology; Flexible electronics; Thin-fm transistors; InGaZnO; AC performance; Focused ion beam
The quest for short channel length transistors is an important challenge in the semiconductor industry. A similar trend is observed in the field of flexible electronics where sensor conditioning circuits and transceivers have to be realized on plastic foils. Here the use of a focused Ga+ ion beam (FIB) to structure the channel of a flexible InGaZnO-based thin-film transistor (TFT) is presented. The resulting flexible TFT exhibits a channel length of 160nm and an effective field effect mobility of 4 cm(2) V-1 s(-1). Furthermore, the optimized Ga+ beam milling does not damage the Al2O3 gate insulator underneath, leading to a gate leakage current of <200 pA. The extreme channel length demonstrates that focused ion beams can complement conventional fabrication approaches, overcoming current limitations imposed by flexible substrates. While the dimensions result in short channel effects and a drain conductance of 25 mu S limiting the DC applicability of the FIB TFT, the device also exhibits a high internal gain of 3.4dB. Consequently, a transit frequency of 6 MHz 19 MHz <= 0.5V. This shows that highly scaled flexible TFTs for analog circuits can be fabricated by ion beam milling.
Showing items related by title, author, creator and subject.
Abdellah A; Abdelhalim A; Loghin F; Kohler P; Ahmad Z; Scarpa G; Lugli P (2013)Carbon nanotubes (CNTs) are demonstrated as one of the most interesting materials for gas sensing. The possibility to obtain CNT thin-films via solution-processing techniques has paved the way for low-cost applications of ...
Fabrication of carbon nanotube thin films on flexible substrates by spray deposition and transfer printing Abdelhalim A; Abdellah A; Scarpa G; Lugli P (2013)We present two different processes for the deposition of high quality CNT films on flexible substrates. The first is a simple and low cost transfer printing process that transfers CNT films deposited on glass to a flexible ...
Fabrication, characterization and modeling of flexible electronic components based on CNT networks Lugli P; Abdellah A; Abdelhalim A; Albrecht A; Becherer M; Cagatay E; Colasanti S; Falco A; Loghin F; El-Molla S; Salmeron J; Rivadeneyra A (IEEE, 2016)In this contribution, we will present a modeling approach based on a stochastic algorithm that can generate non-rigid solid objects in a three-dimensional space, emulating with high fidelity the typical fabrication processes ...