Trap properties of asymmetrical double-gate polysilicon thin-film transistors with low frequency noise in terms of the grain boundaries direction.

Autor: Hastas, Nikolaos, Tsormpatzoglou, Andreas, Pappas, Ilias, Kouvatsos, Dimitrios N., Moschou, Despina C., Voutsas, Apostolos T., Dimitriadis, Charalabos A.
Zdroj: 2012 28th International Conference on Microelectronics Proceedings; 1/ 1/2012, p339-342, 4p
Abstrakt: Low frequency drain current fluctuation noise was measured in two types of polysilicon double gate thin film transistors fabricated by sequential lateral solidification technique keeping the back gate grounded. In X-oriented devices, the grain boundaries are parallel to the drain current flow, while in Y-oriented devices the grain boundaries are lying perpendicular to the drain current flow. The noise spectra consist of generation-recombination (g-r) and flicker noise components. In X-oriented TFTs the g-r centers are related to bulk traps located in the grains, whereas in Y-oriented TFTs the g-r centers correspond to grain boundary traps in addition to bulk traps in the grains. [ABSTRACT FROM PUBLISHER]
Databáze: Complementary Index