Patent ID: RE41426

Claim:
A manufacturing method of a thin film transistor (TFT) for a liquid crystal display comprising the steps of: preparing a transparent substrate having a first and a second surfaces opposite each other; forming a gate wire including a plurality of gate lines and a gate electrode connected to one of the gate lines, a channel layer located at a position corresponding to the gate electrode, a gate insulating layer between the channel layer and the gate electrode, and a data wire which includes a plurality of data lines defining a pixel region enclosed by the gate lines and the data lines, a source electrode connected to one of the data lines and the channel layer, and a drain electrode connected to the channel layer and separated from the source electrode on the first surface of the substrate; depositing a passivation layer over the first surface of the substrate; patterning the passivation layer to form a first contact hole exposing a portion of the drain electrode; depositing a transparent conductive layer; coating a negative photoresist on the transparent conductive layer; front exposing the negative photoresist by irradiating light from the first surface of the substrate using a first mask having first openings at positions corresponding to the first contact hole and the pixel region; developing the negative photoresist; and etching the transparent conductive layer by using the negative photoresist as an etch mask to form a pixel electrode connected to the drain electrode via the first contact hole.