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Thin Film Transistor Modeling: Frequency Dispersion, Michael Shur

Semiconductor Technology for Ultra-Large Scale Integrated Circuits and Thin Film Transistors VI (ULSIC vs TFT 6)

Using new materials (including organic materials), scaling down to shorter device sizes, using printed TFT technology, and operating Thin Film Transistors (TFTs) at higher frequencies all bring upfront the issues of frequency dispersion of the TFT current-voltage and capacitance-voltage characteristics. This dispersion depends on the interplay of the contact phenomena and electron transport in the device channel. The standard way to account for the frequency dispersion is using the Elmore model (see Fig. 1 a) [1,2], which introduces the RC delays to reflect the propagation time of the carriers along the channel. However, this model is not sufficient for the …