http://www.cnr.it/ontology/cnr/individuo/prodotto/ID24940
Modelling Velocity Saturation Effects in Polysilicon Thin-Film Transistors (Articolo in rivista)
- Type
- Label
- Modelling Velocity Saturation Effects in Polysilicon Thin-Film Transistors (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1143/JJAP.45.4374 (literal)
- Alternative label
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- A. Valletta; P. Gaucci; L. Mariucci; G. Fortunato; (literal)
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- http://jjap.jsap.jp/link?JJAP/45/4374/ (literal)
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- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- IFN-CNR, Via Cineto Romano 42, 00156 Roma, Italy (literal)
- Titolo
- Modelling Velocity Saturation Effects in Polysilicon Thin-Film Transistors (literal)
- Abstract
- By using full-two dimensional (2D) numerical simulations, it is found that, similarly to crystalline silicon, velocity saturation effects occur also in polysilicon thin-film transistors (TFTs). Therefore, precise modelling of output characteristics in short channel polysilicon TFTs should take into account velocity saturation effects, which influence the saturation current. Since full-2D numerical simulations are time consuming and unpractical for circuit simulations, we introduced velocity saturation in the gradual channel approximation (GCA), but still we found a non satisfactory agreement with experimental results, especially for short channel devices. We attributed this behaviour to the presence of a strong longitudinal electric field, that is neglected in GCA, when velocity saturation occurs. So we have developed a new quasi-2D model, that takes in account both carrier velocity saturation and the effects of the longitudinal field, which nicely reproduce the experimental data. (literal)
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