Patent ID: 8040452

Claim:
A manufacturing method of a pixel unit of a TFT-LCD array substrate, comprising the steps of: depositing sequentially on a substrate stacked layers of a gate metal layer, a first gate insulating layer, an active layer, and an ohmic contact layer, and then patterning the stacked layers to form a gate island; depositing sequentially a second insulating layer and a source/drain metal layer on the substrate, patterning the second insulating layer and the source/drain metal layer so as to form a source electrode on the second insulating layer and form an opening on the gate island to expose the ohmic contact layer in a source region, a drain region, and a channel region between the source region and the drain region of the TFT; depositing a pixel electrode material layer on the substrate, patterning the pixel electrode material layer and the ohmic contact layer exposed in the opening so that the ohmic contact layer on the channel region is removed, the source electrode is connected with the ohmic contact layer in the source region via the pixel electrode material layer on the source electrode, the drain electrode and the pixel electrode connected with each other are formed on the second insulating layer, and the drain electrode is connected with the ohmic contact layer in the drain region; and depositing a passivation layer on the substrate to cover the TFT.