Patent ID: 6605495
Filing Date: 2003-08-12
Classification: G02F,H01L

Abstract:
A method of fabricating a thin film transistor liquid crystal display (TFT-LCD) with a repair circuit, the method comprising the step of:providing a substrate, at least one transistor region for forming a thin film transistor (TFT) and at least one crossover region being on the substrate; forming a first metal layer on the substrate; patterning the first metal layer by removing a part of the first metal layer to form a gate electrode in the transistor area, a scan line passing through the crossover region and a first repair pad at either side of the crossover region simultaneously on the substrate; depositing a dielectric layer and a semiconductor layer sequentially on the substrate to cover the gate electrode, the scan line, and each first repair pad; forming an etching stop on the semiconductor layer, the etching stop being positioned above the gate electrode; depositing a doped semiconductor layer on the semiconductor layer and the etching stop; forming a second metal layer on the doped semiconductor layer; patterning the second metal layer, the doped semiconductor layer and the semiconductor layer by removing a part of the second metal layer, the doped semiconductor layer and the semiconductor layer to form a source electrode and a drain electrode and to define an active area of the thin film transistor in the transistor region and to form a signal line passing through the crossover region simultaneously; forming a passivation layer on the substrate; patterning the passivation layer by removing a part of the passivation layer positioned above the drain electrode to form a first via hole extending to the top surface of the drain electrode and a second via hole extending to the top surface of a first metal electrode in a peripheral area of the panel; forming a transparent conductive layer on the substrate to fill up the first via hole on the drain electrode; and patterning the transparent conductive layer by removing a part of the transparent conductive layer to form a pixel electrode electrically connected to the drain electrode via the first via hole and simultaneously form a second repair pad above each first repair pad, each first repair pad and the second repair pad form a repair circuit region.