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In recent years, the increasing use of active matrix flat-panel displays and bio-medical imagers in commercial electronic products has drawn a significant attention to thin-film transistors (TFT) and technologies. TFTs on amorphousand poly-silicon as well as newly emerging organic, transparent metal oxide and nano-composite semiconductor technologies are becoming increasingly common. Flat panel displays are finding widespread use in many products such as cellular phones, personal digital assistants (PDAs), camcorders, laptop personal computers (PCs). The active matrix display is composed of a grid or matrix of picture elements called "pixels". Thousands or millions of these pixels together create an image on the display, in which the TFTs act as switches to individually turn each pixel. More increasingly TFTs are starting to be used as analog circuit elements for rudimentary signal conditioning.