Multiple conductive layer tft

Abstract

A multiple layer pixel architecture for an active matrix display is provided having a common bus line on a metal level separate from that on which the gate electrodes of the thin-film transistors (TFTs) are formed. A multilayer electronic structure includes a TFT for driving a pixel of an active matrix optoelectronic device and a capacitor for storing charge to maintain an electrical state of said active matrix pixel, wherein the structure includes a substrate bearing at least four conducting layers separated by at least three dielectric layers, first and second ones of said conducting layers defining drain/source electrodes and a gate electrode of said transistor respectively, and third and fourth ones of said conducting layers defining respective first and second plates of said capacitor, wherein said capacitor and said transistor are laterally positioned such that they overlap in a vertical direction.