Patent ID: 7425473
Filing Date: 2008-09-16
Classification: G02F,H01L

Abstract:
1. A method for making thin film transistors, TFTs, on a substrate, comprising the steps of: applying a first conductor metal on the substrate; patterning and etching the first conductor metal to form gate bus-lines having gate electrodes, and to form data bus-lines having corresponding data bus-line segments separated from one another at cross over regions where the data bus-lines and the gate bus-lines would intersect; applying on the substrate, a first layer of TFT gate insulation, a second layer of semiconducting material and a third layer of ohmic contact material; patterning and etching the third layer, the second layer and the first layer to form bridging structures in the form of TFTs, the bridging structures crossing over the gate bus-lines at the cross over regions; applying a second conductor metal on the substrate; patterning and etching the second conductor metal to form TFT source electrode terminals of the TFTs and TFT drain electrode terminals of the TFTs, and to comprise continuous data bus-lines extending over the bridging structures to connect the corresponding data bus-line segments; applying a passivation layer on the substrate; patterning and etching the passivation layer to form via holes through the passivation layer to the pads and through the passivation layer to the source electrode terminal; and applying a transparent conducting material on the substrate to form pixel electrodes and storage capacitors.