Patent ID: 6537840
Filing Date: 2003-03-25
Classification: G02F,H01L

Abstract:
A process for manufacturing a thin film transistor liquid crystal display, comprising the steps of:(a) providing a substrate having a transistor area, a capacitor area, a pixel area, and a gate pad area; (b) depositing and patterning a first metal layer on the substrate to form a gate electrode, a capacitor upper electrode, and a pad electrode respectively in the transistor area, the capacitor area, and the gate pad area; (c) depositing and patterning an insulating layer, a semiconductor layer, a doped silicon layer and a second metal layer to (1) form an island structure in the transistor area and a capacitor in the capacitor area, and (2) remove the second metal layer, the doped silicon layer, the semiconductor layer and the insulating layer in the pixel area and the gate pad area to expose the substrate in the pixel area and expose the pad electrode in the gate pad area; (d) depositing a transparent conducting layer; and (e) forming a patterned photo resist layer above the transparent conductive layer to form a mask, and using the mask to (1) define a channel area in the transistor area, and remove the transparent conducting layer within the channel area so as to define pixel electrodes, and (2) remove parts of the second metal layer and the doped silicon layer uncovered by the transparent conducting layer so as to define a source electrode and a drain electrode in the transistor area, therefore, the source electrode and the drain electrode being separated by the channel area to expose the semiconductor layer within the channel area.