Patent ID: 7636135

Claim:
A thin film transistor liquid crystal display (TFT-LCD) array substrate, comprising: a substrate: a gate line and a data line formed on the substrate and intersecting with each other to define a pixel region; a pixel electrode formed in the pixel region; and a TFT that is formed on the substrate and has a gate electrode connected with the gate line, a source electrode connected with the data line, and a drain electrode connected with the pixel electrode, wherein a first insulating layer, a semiconductor layer, and an ohmic contact layer are formed sequentially on the gate line and the gate electrode, and the ohmic contact layer is formed on a source region and a drain region of the semiconductor layer and exposes a channel; wherein a second insulating layer is formed on the substrate, covers the sidewalls of the gate line and gate electrode, the first insulating layer, the semiconductor layer, and the ohmic contact layer, and exposes the ohmic contact layer in the source region and the drain region; wherein the data line, the source electrode, the pixel electrode, and the drain electrode are formed on the second insulating layer, and the source electrode and the drain electrode contact the ohmic contact layer in the source region and the drain region through the exposure in the second insulating layer, respectively; and wherein a passivation layer is formed on the TFT, the gate line and the data line, and exposes the pixel electrode.