Patent ID: 7235813
Filing Date: 2007-06-26
Classification: H01L

Abstract:
1. A thin film transistor, comprising: a scan line, formed on a substrate; a gate electrode, formed on the substrate and electrically connected to the scan line, wherein the gate electrode has at least one notch; a gate dielectric layer, formed over the substrate, covering the scan line and the gate electrode; a drain region, formed over the notch of the gate electrode and the drain region overlapping a portion of the gate electrode at the edge of the notch and a portion of scan line; a trident source region, formed on the gate dielectric layer, wherein the trident source region comprises: two first projecting portions formed on the gate dielectric layer, wherein the two first projecting portions are over a region outside the notch of the gate electrode and the two first projecting portions overlap a portion of the gate electrode; a second projecting portion, formed over the scan line between the two first projecting portions, wherein the second projecting portion is shorter than the two first projecting portions; and a connection portion, connecting the second projecting portion and the two first projecting portions; and a channel layer, formed between the gate electrode and the drain and trident source regions.