tesi R. Miscioscia.pdf - EleA@UniSA
tesi R. Miscioscia.pdf - EleA@UniSA
tesi R. Miscioscia.pdf - EleA@UniSA
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Chapter 2<br />
A survey on the state of the art<br />
Organic Thin-Film Transistors<br />
processing<br />
This chapter is a brief overview of common features, technology<br />
and advances in the OTFT branch of Organic Electronics. This<br />
introduction, without pretending to be neither complete nor extensive<br />
has the objective to sketch out the framework in which the present<br />
thesis goes to insert itself. Some significant Literature results have<br />
been collected about materials, dielectrics, channel organic<br />
semiconductors and the related processing techniques to make easier<br />
the tagging of the major on-going activities in OTFT and in the<br />
interest sectors where investigations and optimizations are still<br />
necessary.<br />
2.1 Performance parameters<br />
Performance of a single organic FET can be evaluated by<br />
considering results already assessed for MOSFET devices because<br />
they share with them part of the working principles, firstapproximation<br />
models and some circuital topologies they are<br />
intended to be used for [3][4][5].<br />
In particular for the sake of their technological and design<br />
relevance a great part of the attention is today dedicated to:<br />
Charge mobility (µ)<br />
Gate leakages<br />
Gate breakdown voltages<br />
Ion/Ioff ratio<br />
Threshold and on-set voltages<br />
Sub threshold slope